Merge branch 'master' into feature-3dmouse-spnav

sources/ElementsCollection/elementscollectionmodel.cpp

@@ -49,6 +49,14 @@ ElementsCollectionModel::ElementsCollectionModel(QObject *parent) :
 */
 ElementsCollectionModel::~ElementsCollectionModel()
 {
+	// Without cancel(), the wait below runs the whole queued
+	// QtConcurrent::map() to completion, so closing this dialog on a
+	// large collection blocks until every remaining item has been
+	// processed -- a visible hang on the button pressed precisely to
+	// stop the work. cancel() drops the not-yet-started items so the
+	// wait that follows (still needed, so an in-flight item can't
+	// dereference this object after it's gone) is short.
+	m_future.cancel();
 	m_future.waitForFinished();
 }
 
@@ -431,7 +439,7 @@ void ElementsCollectionModel::addLocation(const ElementsLocation& location)
 											   collection_name);
 		}
 	}
-	// ANPASSUNG: Makros und Custom Collection werden hier behandelt!
+	// Macros and Custom Collection are handled here
 	else if (location.isCustomCollection() || location.isMacrosCollection()) {
 		QList <ElementCollectionItem *> child_list;
 
@@ -647,7 +655,7 @@ QModelIndex ElementsCollectionModel::indexFromLocation(
 		if (eci->type() == FileElementCollectionItem::Type) {
 			if (FileElementCollectionItem *feci = static_cast<FileElementCollectionItem *>(eci)) {
 
-				// ANPASSUNG: Makro-Prüfung hinzugefügt, damit das Modell den Pfad im Baum findet!
+				// Macro check added so the model finds the path in the tree
 				if ( (location.isCommonCollection() && feci->isCommonCollection()) ||
 					(location.isCompanyCollection() && feci->isCompanyCollection()) ||
 					(location.isMacrosCollection() && feci->isMacrosCollection()) ||

sources/ElementsCollection/elementslocation.cpp

@@ -653,9 +653,16 @@ QDomElement ElementsLocation::xml() const
 	if (!m_project)
 	{
 		QFile file (m_file_system_path);
+		if (!file.open(QIODevice::ReadOnly | QIODevice::Text))
+			return QDomElement();
+
 		QDomDocument docu;
 		if (docu.setContent(&file))
+		{
+			file.close();
 			return docu.documentElement();
+		}
+		file.close();
 	}
 	else
 	{

sources/ElementsCollection/fileelementcollectionitem.cpp

@@ -162,7 +162,7 @@ QString FileElementCollectionItem::localName()
 			else if (m_path == QETApp::customElementsDirN())
 				setText(QObject::tr("Collection utilisateur"));
 			else if (m_path == macrosPath)
-				setText(QObject::tr("Makros"));
+				setText(QObject::tr("Macros"));
 			else
 				setText(QObject::tr("Collection inconnue"));
 		}

sources/TerminalStrip/ui/freeterminaleditor.cpp

@@ -46,10 +46,11 @@ FreeTerminalEditor::FreeTerminalEditor(QETProject *project, QWidget *parent) :
         connect(m_project, &QObject::destroyed, this, &FreeTerminalEditor::reload);
     }
 
-		//Disabled the move if the table is currently edited (yellow cell)
-	connect(m_model, &FreeTerminalModel::dataChanged, this, [=] {
-		this->setDisabledMove();
-	});
+		//Disable the move button while cells are edited (yellow), re-evaluate on every change
+	connect(m_model, &FreeTerminalModel::dataChanged, this, &FreeTerminalEditor::selectionChanged);
+
+	connect(ui->m_table_view->selectionModel(), &QItemSelectionModel::selectionChanged,
+			this, &FreeTerminalEditor::selectionChanged);
 
 	connect(ui->m_table_view, &QAbstractItemView::doubleClicked, this, [=](const QModelIndex &index)
 	{
@@ -102,7 +103,7 @@ void FreeTerminalEditor::reload()
 			QString str(strip->installation() + " " + strip->location() + " " + strip->name());
 			ui->m_move_in_cb->addItem(str, strip->uuid());
 		}
-		setDisabledMove(false);
+		selectionChanged();
 	}
 }
 
@@ -273,10 +274,19 @@ void FreeTerminalEditor::on_m_move_pb_clicked()
 	reload();
 }
 
+void FreeTerminalEditor::selectionChanged()
+{
+	const bool has_selection = !ui->m_table_view->selectionModel()->selectedIndexes().isEmpty();
+	const bool has_pending   = !m_model->modifiedModelRealTerminalData().isEmpty();
+	setDisabledMove(!has_selection || has_pending);
+}
+
 void FreeTerminalEditor::setDisabledMove(bool b)
 {
 	ui->m_move_label->setDisabled(b);
 	ui->m_move_in_cb->setDisabled(b);
 	ui->m_move_pb->setDisabled(b);
+	ui->m_move_pb->setToolTip(b ? tr("Appliquez ou annulez les modifications en cours avant de déplacer")
+								: tr("Déplacer les bornes sélectionnées vers le bornier choisi"));
 }
 

sources/TerminalStrip/ui/freeterminalmodel.cpp

@@ -182,7 +182,7 @@ bool FreeTerminalModel::setData(const QModelIndex &index, const QVariant &value,
 		modified_ = true;
 		modified_cell = FUNCTION_CELL;
 	}
-	else if (column_ == LED_CELL)
+	else if (column_ == LED_CELL && mrtd.led_ != value.toBool())
 	{
 		mrtd.led_ = value.toBool();
 		modified_ = true;

sources/autoNum/renumberelementscommand.cpp

@@ -0,0 +1,78 @@
+/*
+    Copyright 2006-2026 The QElectroTech Team
+    This file is part of QElectroTech.
+
+    QElectroTech is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    QElectroTech is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "renumberelementscommand.h"
+
+#include "../qetproject.h"
+#include "../qetgraphicsitem/element.h"
+
+RenumberElementsCommand::RenumberElementsCommand(
+        QETProject *project,
+        QVector<ElementChange> changes,
+        QHash<QString, NumerotationContext> old_ctx,
+        QHash<QString, NumerotationContext> new_ctx,
+        const QString &text)
+    : QUndoCommand(text)
+    , project_(project)
+    , changes_(std::move(changes))
+    , old_ctx_(std::move(old_ctx))
+    , new_ctx_(std::move(new_ctx))
+{
+}
+
+void RenumberElementsCommand::undo()
+{
+    apply(false);
+}
+
+void RenumberElementsCommand::redo()
+{
+    // QUndoStack calls redo() once immediately after push(); keep standard behaviour.
+    if (first_redo_) {
+        first_redo_ = false;
+    }
+    apply(true);
+}
+
+void RenumberElementsCommand::apply(bool use_new)
+{
+    if (!project_) return;
+
+    // Restore project contexts
+    const auto &ctx = use_new ? new_ctx_ : old_ctx_;
+    for (auto it = ctx.constBegin(); it != ctx.constEnd(); ++it) {
+        project_->addElementAutoNum(it.key(), it.value());
+    }
+
+    // Apply per-element changes
+    for (const ElementChange &c : changes_) {
+        if (!c.element) continue;
+
+        const bool frozen = use_new ? c.new_frozen : c.old_frozen;
+        const auto &infos = use_new ? c.new_infos : c.old_infos;
+        const auto &seq   = use_new ? c.new_seq   : c.old_seq;
+
+        // Temporarily unfreeze so that label/infos update correctly.
+        const bool was_frozen = c.element->isFreezeLabel();
+        if (was_frozen) c.element->freezeLabel(false);
+
+        c.element->rSequenceStruct() = seq;
+        c.element->setElementInformations(infos);
+        c.element->freezeLabel(frozen);
+    }
+}

sources/autoNum/renumberelementscommand.h

@@ -0,0 +1,70 @@
+/*
+    Copyright 2006-2026 The QElectroTech Team
+    This file is part of QElectroTech.
+
+    QElectroTech is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    QElectroTech is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RENUMBERELEMENTSCOMMAND_H
+#define RENUMBERELEMENTSCOMMAND_H
+
+#include <QUndoCommand>
+#include <QHash>
+#include <QVector>
+
+#include "../diagramcontext.h"
+#include "assignvariables.h" // defines autonum::sequentialNumbers
+
+class Element;
+class QETProject;
+
+/**
+ * @brief Undoable renumbering of element labels and sequence structs.
+ */
+class RenumberElementsCommand final : public QUndoCommand
+{
+public:
+    struct ElementChange
+    {
+        Element *element = nullptr;
+        DiagramContext old_infos;
+        DiagramContext new_infos;
+        autonum::sequentialNumbers old_seq;
+        autonum::sequentialNumbers new_seq;
+        bool old_frozen = false;
+        bool new_frozen = false;
+    };
+
+    RenumberElementsCommand(
+            QETProject *project,
+            QVector<ElementChange> changes,
+            QHash<QString, NumerotationContext> old_ctx,
+            QHash<QString, NumerotationContext> new_ctx,
+            const QString &text);
+
+    void undo() override;
+    void redo() override;
+
+private:
+    void apply(bool use_new);
+
+private:
+    QETProject *project_ = nullptr;
+    QVector<ElementChange> changes_;
+    QHash<QString, NumerotationContext> old_ctx_;
+    QHash<QString, NumerotationContext> new_ctx_;
+    bool first_redo_ = true;
+};
+
+#endif // RENUMBERELEMENTSCOMMAND_H

sources/autoNum/ui/autonumberingmanagementw.cpp

@@ -23,6 +23,7 @@
 #include "formulaautonumberingw.h"
 #include "numparteditorw.h"
 #include "qdebug.h"
+#include "renumberelementsdialog.h"
 #include "ui_autonumberingmanagementw.h"
 #include "ui_formulaautonumberingw.h"
 
@@ -48,6 +49,8 @@ AutoNumberingManagementW::AutoNumberingManagementW(QETProject *project,
 	ui->m_selected_folios_le->setDisabled(true);
 	ui->m_selected_folios_le->setReadOnly(true);
 	ui->m_apply_project_rb->setChecked(true);
+	// Enabled only when project is in "Under Development" status and not read-only.
+	ui->m_renumber_elements_pb->setEnabled(ui->m_status_cb->currentIndex() == 0 && project_ && !project_->isReadOnly());
 	setProjectContext();
 }
 
@@ -87,6 +90,7 @@ void AutoNumberingManagementW::on_m_status_cb_currentIndexChanged(int index)
 		ui->m_both_conductor_rb->setChecked(true);
 		ui->m_both_element_rb->setChecked(true);
 		ui->m_both_folio_rb->setChecked(true);
+		ui->m_renumber_elements_pb->setEnabled(true);
 	}
 	//Installing
 	else if (index == 1) {
@@ -96,15 +100,31 @@ void AutoNumberingManagementW::on_m_status_cb_currentIndexChanged(int index)
 		ui->m_new_conductor_rb->setChecked(true);
 		ui->m_new_element_rb->setChecked(true);
 		ui->m_new_folio_rb->setChecked(true);
+		ui->m_renumber_elements_pb->setEnabled(true);
 	}
 	//Built
 	else if (index == 2) {
 		ui->m_disable_conductor_rb->setChecked(true);
 		ui->m_disable_element_rb->setChecked(true);
 		ui->m_disable_folio_rb->setChecked(true);
+        	ui->m_renumber_elements_pb->setEnabled(false);
 	}
 }
 
+void AutoNumberingManagementW::on_m_renumber_elements_pb_clicked()
+{
+	if (!project_ || project_->isReadOnly()) return;
+	// Only allowed during "Under Development"
+	// if (ui->m_status_cb->currentIndex() != 1) return;
+
+	QStringList titles = project_->elementAutoNum().keys();
+	titles.sort(Qt::CaseInsensitive);
+	RenumberElementsDialog dlg(titles, this);
+	if (dlg.exec() != QDialog::Accepted) return;
+
+	project_->renumberElementsBySchemeTitle(dlg.selectedSchemeTitle());
+}
+
 /**
 	@brief AutoNumberingManagementW::on_m_apply_folios_rb_clicked
 	Set From Folios Combobox

sources/autoNum/ui/autonumberingmanagementw.h

@@ -50,6 +50,7 @@ class AutoNumberingManagementW : public QWidget
 		void on_m_from_folios_cb_currentIndexChanged(int);
 		void on_m_to_folios_cb_currentIndexChanged(int);
 		void on_m_status_cb_currentIndexChanged(int);
+		void on_m_renumber_elements_pb_clicked();
 		void on_m_apply_folios_rb_clicked();
 		void on_m_apply_project_rb_clicked();
 		void on_buttonBox_clicked(QAbstractButton *);

sources/autoNum/ui/autonumberingmanagementw.ui

@@ -305,6 +305,13 @@
            </property>
           </widget>
          </item>
+        <item>
+         <widget class="QPushButton" name="m_renumber_elements_pb">
+          <property name="text">
+           <string>Renumber element(s)…</string>
+          </property>
+         </widget>
+        </item>
          <item>
           <spacer name="horizontalSpacer_2">
            <property name="orientation">

sources/autoNum/ui/renumberelementsdialog.cpp

@@ -0,0 +1,75 @@
+/*
+    Copyright 2006-2026 The QElectroTech Team
+    This file is part of QElectroTech.
+
+    QElectroTech is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    QElectroTech is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "renumberelementsdialog.h"
+
+#include <QComboBox>
+#include <QDialogButtonBox>
+#include <QFormLayout>
+#include <QGroupBox>
+#include <QHBoxLayout>
+#include <QLabel>
+#include <QRadioButton>
+#include <QVBoxLayout>
+
+RenumberElementsDialog::RenumberElementsDialog(const QStringList &scheme_titles, QWidget *parent)
+    : QDialog(parent)
+    , m_scheme_titles(scheme_titles)
+{
+    setWindowTitle(tr("Renumber element(s)"));
+    setModal(true);
+
+    auto *vl = new QVBoxLayout(this);
+
+    auto *scope = new QGroupBox(tr("Scope"), this);
+    auto *scope_l = new QVBoxLayout(scope);
+    m_all_rb = new QRadioButton(tr("All schemes"), scope);
+    m_one_rb = new QRadioButton(tr("One scheme"), scope);
+    scope_l->addWidget(m_all_rb);
+    scope_l->addWidget(m_one_rb);
+    vl->addWidget(scope);
+
+    auto *form = new QFormLayout();
+    m_combo = new QComboBox(this);
+    m_combo->addItems(m_scheme_titles);
+    form->addRow(new QLabel(tr("Scheme:"), this), m_combo);
+    vl->addLayout(form);
+
+    m_buttons = new QDialogButtonBox(QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
+    connect(m_buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
+    connect(m_buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
+    vl->addWidget(m_buttons);
+
+    m_all_rb->setChecked(true);
+    updateUi();
+
+    connect(m_all_rb, &QRadioButton::toggled, this, &RenumberElementsDialog::updateUi);
+    connect(m_one_rb, &QRadioButton::toggled, this, &RenumberElementsDialog::updateUi);
+}
+
+QString RenumberElementsDialog::selectedSchemeTitle() const
+{
+    if (m_all_rb && m_all_rb->isChecked()) return QString();
+    return m_combo ? m_combo->currentText() : QString();
+}
+
+void RenumberElementsDialog::updateUi()
+{
+    const bool one = m_one_rb && m_one_rb->isChecked();
+    if (m_combo) m_combo->setEnabled(one);
+}

sources/autoNum/ui/renumberelementsdialog.h

@@ -0,0 +1,59 @@
+/*
+    Copyright 2006-2026 The QElectroTech Team
+    This file is part of QElectroTech.
+
+    QElectroTech is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    QElectroTech is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef RENUMBERELEMENTSDIALOG_H
+#define RENUMBERELEMENTSDIALOG_H
+
+#include <QDialog>
+#include <QStringList>
+
+class QComboBox;
+class QRadioButton;
+class QDialogButtonBox;
+
+/**
+ * @brief Simple dialog to pick renumbering scope for elements.
+ *
+ * The user can choose between:
+ *  - all element autonumbering schemes
+ *  - one selected scheme title
+ */
+class RenumberElementsDialog final : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit RenumberElementsDialog(const QStringList &scheme_titles, QWidget *parent = nullptr);
+
+    /**
+     * @return Empty string if "all" is selected, otherwise the chosen scheme title.
+     */
+    QString selectedSchemeTitle() const;
+
+private slots:
+    void updateUi();
+
+private:
+    QStringList m_scheme_titles;
+    QRadioButton *m_all_rb = nullptr;
+    QRadioButton *m_one_rb = nullptr;
+    QComboBox *m_combo = nullptr;
+    QDialogButtonBox *m_buttons = nullptr;
+};
+
+#endif // RENUMBERELEMENTSDIALOG_H

sources/bordertitleblock.cpp

@@ -896,10 +896,20 @@ void BorderTitleBlock::updateDiagramContextForTitleBlock(
 	// An empty page-level value means the variable was auto-added to the
 	// folio's Custom tab (#495) but never actually set by the user, so it
 	// must not shadow a real project-level value of the same name (#531).
+	//
+	// That guard has to stop short of removing the key outright, though
+	// (#973). TitleBlockTemplate::interpreteVariables() only replaces a
+	// "%name"/"%{name}" placeholder when "name" is a key in this context at
+	// all -- an unset variable that never makes it in is left as its own
+	// literal placeholder text in the rendered title block, not blank.
+	// So an empty page-level value is skipped only when a real project-level
+	// one is already there to show through; otherwise it still goes in
+	// empty, which is what makes the placeholder resolve to nothing.
 	DiagramContext context = initial_context;
 	foreach (QString key, additional_fields_.keys()) {
-		if (!additional_fields_[key].toString().isEmpty())
-			context.addValue(key, additional_fields_[key]);
+		const QVariant value = additional_fields_[key];
+		if (!value.toString().isEmpty() || !context.contains(key))
+			context.addValue(key, value);
 	}
 
 	// ... overridden by the historical and/or dynamically generated fields

sources/dataBase/projectdatabase.cpp

@@ -17,6 +17,8 @@
 */
 #include "projectdatabase.h"
 
+#include "sqlreadonly.h"
+
 #include "../diagram.h"
 #include "../diagramposition.h"
 #include "../elementprovider.h"
@@ -28,13 +30,15 @@
 #include "../qetproject.h"
 
 #include <QLocale>
+#include <QFile>
 #include <QRegularExpression>
-#include <QSqlError>
-
 #include <QSqlDriver>
+#include <QSqlError>
 #include <sqlite3.h>
 
 
+
+
 /**
 	@brief projectDataBase::projectDataBase
 	Default constructor
@@ -208,6 +212,12 @@ bool projectDataBase::isReadOnlySelect(const QString &query, QString *error)
 */
 QSqlQuery projectDataBase::newQuery(const QString &query, QString *error) {
 	QString reason;
+
+	// First gate: which kind of statement is acceptable here at all. A
+	// textual check is the right tool for that and the wrong tool for
+	// anything else -- see isReadOnlySelect()'s own comment. It is what
+	// keeps ATTACH, BEGIN and PRAGMA out, none of which SQLite itself
+	// considers writes.
 	if (!isReadOnlySelect(query, &reason)) {
 		qWarning().noquote() << "projectDataBase::newQuery: rejected query:" << reason << "--" << query;
 		if (error) {
@@ -215,6 +225,24 @@ QSqlQuery projectDataBase::newQuery(const QString &query, QString *error) {
 		}
 		return QSqlQuery(m_data_base);
 	}
+
+	// Second gate, and the one that actually enforces read-only: SQLite is
+	// asked about the statement it compiled, instead of the text being read
+	// for clues. The first gate cannot see through a CTE prefix --
+	// "WITH x AS (SELECT 1) DELETE FROM element" starts with WITH, contains
+	// no semicolon, and deletes every row. That matters beyond the
+	// custom-query box, because this path is reachable from a file: a
+	// <graphics_table>'s saved <query> is read straight out of the .qet by
+	// ProjectDBModel::fromXml() and executed by fillValue(), so opening or
+	// exporting a project someone else produced would have been enough.
+	if (!QETSql::isSingleReadOnlyStatement(sqliteHandle(&m_data_base), query, &reason)) {
+		qWarning().noquote() << "projectDataBase::newQuery: rejected query:" << reason << "--" << query;
+		if (error) {
+			*error = reason;
+		}
+		return QSqlQuery(m_data_base);
+	}
+
 	return QSqlQuery(query, m_data_base);
 }
 
@@ -291,10 +319,23 @@ void projectDataBase::addElement(Element *element)
 void projectDataBase::removeElement(Element *element)
 {
 	m_content_changed = true;
+	bool changed = false;
+
 	m_remove_element_query.bindValue(":uuid", element->uuid().toString());
-	if(!m_remove_element_query.exec()) {
-		qDebug() << "projectDataBase::removeElement remove error : " << m_remove_element_query.lastError();
+	if (m_remove_element_query.exec()) {
+		changed = true;
 	} else {
+		qDebug() << "projectDataBase::removeElement remove error : " << m_remove_element_query.lastError();
+	}
+
+	m_remove_element_info_query.bindValue(":uuid", element->uuid().toString());
+	if (m_remove_element_info_query.exec()) {
+		changed = true;
+	} else {
+		qDebug() << "projectDataBase::removeElement remove element_info error : " << m_remove_element_info_query.lastError();
+	}
+
+	if (changed) {
 		emit dataBaseUpdated();
 	}
 }
@@ -1131,6 +1172,21 @@ void projectDataBase::prepareQuery()
 	m_remove_element_query = QSqlQuery(m_data_base);
 	m_remove_element_query.prepare(remove_element);
 
+		//REMOVE ELEMENT INFO
+		//element_info has no ON DELETE CASCADE (foreign keys aren't
+		//enforced by this connection), so removeElement() must clear it
+		//explicitly. Without this, the row is orphaned under the removed
+		//element's uuid, and re-adding an element with that same uuid
+		//later -- undo of this same removal, or a redo replaying it --
+		//hits element_info's PRIMARY KEY constraint on element_uuid: the
+		//element re-add succeeds, but its element_info insert silently
+		//fails and is lost. removeDiagram()'s cascade already clears this
+		//table when a whole folio goes, but that does not run for a
+		//single element removed on its own.
+	QString remove_element_info("DELETE FROM element_info WHERE element_uuid=:uuid");
+	m_remove_element_info_query = QSqlQuery(m_data_base);
+	m_remove_element_info_query.prepare(remove_element_info);
+
 		//UPDATE ELEMENT INFO
 	QString update_str("UPDATE element_info SET ");
 	for (auto string : QETInformation::elementInfoKeys()) {
@@ -1245,7 +1301,6 @@ void projectDataBase::bindDiagramInfoValues(QSqlQuery &query, Diagram *diagram)
 	}
 }
 
-#ifdef QET_EXPORT_PROJECT_DB
 /**
 	@brief projectDataBase::sqliteHandle
 	@param db
@@ -1263,6 +1318,7 @@ sqlite3 *projectDataBase::sqliteHandle(QSqlDatabase *db)
 	return handle;
 }
 
+#ifdef QET_EXPORT_PROJECT_DB
 
 /**
  * @brief projectDataBase::exportDb
@@ -1298,27 +1354,19 @@ void projectDataBase::exportDb(projectDataBase *db,
 		return;
 	}
 
-	QString connection_name("export_project_db_" % db->project()->uuid().toString());
-
-	if (true) //Enter in a scope only to nicely use QSqlDatabase::removeDatabase just after the end of the scope
-	{
-		auto file_db = QSqlDatabase::addDatabase("QSQLITE", connection_name);
-		file_db.setDatabaseName(path_);
-		if (!file_db.open()) {
-			return;
-		}
-
-		auto memory_db_handle = sqliteHandle(&db->m_data_base);
-		auto file_db_handle = sqliteHandle(&file_db);
-
-		auto sqlite_backup = sqlite3_backup_init(file_db_handle, "main", memory_db_handle, "main");
-		if (sqlite_backup)
-		{
-			sqlite3_backup_step(sqlite_backup, -1);
-			sqlite3_backup_finish(sqlite_backup);
-		}
-		file_db.close();
+	// VACUUM INTO requires the destination not to exist. QFileDialog may ask
+	// about overwriting, but it does not remove the existing file for us.
+	if (QFile::exists(path_) && !QFile::remove(path_)) {
+		qWarning() << "Unable to replace project database export:" << path_;
+		return;
+	}
+
+	// VACUUM INTO creates a standalone copy of the current database without
+	// requiring access to the SQLite driver's native connection handle.
+	const auto escaped_path = path_.replace("'", "''");
+	QSqlQuery query(db->m_data_base);
+	if (!query.exec("VACUUM INTO '" % escaped_path % "'")) {
+		qWarning() << "Unable to export project database:" << query.lastError().text();
 	}
-	QSqlDatabase::removeDatabase(connection_name);
 }
 #endif

sources/dataBase/projectdatabase.h

@@ -29,7 +29,7 @@ class QETProject;
 class Diagram;
 class Conductor;
 class Terminal;
-class sqlite3;
+struct sqlite3;
 
 /**
 	@brief The projectDataBase class
@@ -61,6 +61,26 @@ class projectDataBase : public QObject
 		QETProject *project() const;
 		QSqlQuery newQuery(const QString &query = QString(), QString *error = nullptr);
 		static bool isReadOnlySelect(const QString &query, QString *error = nullptr);
+
+			/**
+				The most rows any caller reads out of one query result.
+
+				A SELECT is not bounded by how much data the project holds:
+				SQLite produces rows lazily, so a query that never stops
+				producing them makes the loop that reads them never stop
+				either. A recursive CTE does exactly that in one line, and
+				a <graphics_table>'s <query> is stored in the .qet and run
+				on load -- so the text can arrive from a file rather than
+				from the person at the keyboard, and opening that file is
+				the whole attack.
+
+				100000 is far above any real result: the largest table in
+				the shipped examples is 396 rows. It is a backstop, not a
+				page size -- a caller that hits it has almost certainly
+				been handed something it should not run to completion, and
+				says so rather than truncating quietly.
+			*/
+		static constexpr int MaxResultRows = 100000;
 		QSqlDatabase database() const {return m_data_base;}
 		int excludedConductorCount() const;
 
@@ -119,6 +139,7 @@ class projectDataBase : public QObject
 		QSqlQuery m_insert_elements_query,
 				  m_insert_element_info_query,
 				  m_remove_element_query,
+				  m_remove_element_info_query,
 				  m_update_element_query,
 				  m_insert_diagram_query,
 				  m_remove_diagram_query,
@@ -135,9 +156,14 @@ class projectDataBase : public QObject
 				  m_cascade_remove_conductor_query,
 				  m_cascade_remove_element_query;
 
+	public:
+		// Deliberately outside the QET_EXPORT_PROJECT_DB guard below:
+		// newQuery() needs the raw connection to ask SQLite whether a
+		// query only reads, and that check runs in every build.
+		static sqlite3 *sqliteHandle(QSqlDatabase *db);
+
 #ifdef QET_EXPORT_PROJECT_DB
 	public:
-		static sqlite3 *sqliteHandle(QSqlDatabase *db);
 		static void exportDb(projectDataBase *db,
 				     QWidget *parent = nullptr,
 				     const QString &caption = QString(),

sources/dataBase/sqlreadonly.cpp

@@ -0,0 +1,134 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "sqlreadonly.h"
+
+#include <QCoreApplication>
+
+#include <sqlite3.h>
+
+namespace QETSql {
+
+/**
+	@brief QETSql::isSingleReadOnlyStatement
+	Ask SQLite itself whether @p query is exactly one statement, and whether
+	that statement only reads.
+
+	Why SQLite is asked rather than the text inspected: a check on the
+	query's first keyword cannot see what the statement actually does.
+	SQLite has allowed a CTE prefix in front of a data-modifying statement
+	since 3.8.3, so
+
+	@code
+	WITH x AS (SELECT 1) DELETE FROM element
+	@endcode
+
+	begins with WITH, contains no semicolon, and deletes every row.
+	sqlite3_stmt_readonly() reports on the statement SQLite compiled, not
+	on how it was spelled, so the same query is correctly refused here
+	while an ordinary WITH ... SELECT still passes.
+
+	The statement is compiled and immediately finalised; sqlite3_prepare_v2()
+	does not run it, so nothing is executed to reach this verdict.
+
+	This is a read-only test, NOT a statement-type allowlist: SQLite
+	considers ATTACH, BEGIN and several PRAGMAs read-only too, because none
+	of them change the contents of the database. Callers that need to
+	restrict which *kind* of statement is acceptable must say so separately
+	-- projectDataBase::newQuery() keeps isReadOnlySelect() in front of this
+	for exactly that reason.
+
+	@param handle the connection the query would run on. A null handle is
+	refused rather than waved through: without it there is nothing to ask,
+	and guessing from the text is the weakness this exists to replace.
+	@param query the raw SQL text
+	@param error set to a human-readable reason when this returns false
+	@return true if @p query is a single, read-only statement
+*/
+bool isSingleReadOnlyStatement(sqlite3 *handle, const QString &query, QString *error)
+{
+	if (error) {
+		error->clear();
+	}
+
+	if (!handle) {
+		if (error) {
+			*error = QCoreApplication::translate("QETSql",
+				"Impossible de vérifier la requête : "
+				"aucune connexion SQLite disponible.");
+		}
+		return false;
+	}
+
+	const QByteArray utf8 = query.toUtf8();
+	sqlite3_stmt *statement = nullptr;
+	const char *tail = nullptr;
+
+	if (sqlite3_prepare_v2(handle, utf8.constData(), utf8.size(),
+			       &statement, &tail) != SQLITE_OK)
+	{
+		if (error) {
+			*error = QCoreApplication::translate("QETSql",
+					"Requête SQL invalide : %1")
+				 .arg(QString::fromUtf8(sqlite3_errmsg(handle)));
+		}
+		sqlite3_finalize(statement);
+		return false;
+	}
+
+	// Whitespace or a bare comment compiles successfully to no statement
+	// at all, and sqlite3_stmt_readonly() must not be handed that.
+	if (!statement) {
+		if (error) {
+			*error = QCoreApplication::translate("QETSql",
+				"La requête ne contient aucune instruction.");
+		}
+		return false;
+	}
+
+	const bool read_only = sqlite3_stmt_readonly(statement) != 0;
+	sqlite3_finalize(statement);
+
+	if (!read_only) {
+		if (error) {
+			*error = QCoreApplication::translate("QETSql",
+				"Seules les requêtes en lecture seule sont autorisées : "
+				"cette requête modifierait la base de données.");
+		}
+		return false;
+	}
+
+	// tail points just past the first statement, semicolon included.
+	// Anything left once semicolons and spacing are stripped is a second
+	// statement -- caught structurally here, where "SELECT ';'" is a
+	// perfectly ordinary query rather than a suspicious string.
+	if (tail) {
+		QString rest = QString::fromUtf8(tail);
+		rest.remove(QLatin1Char(';'));
+		if (!rest.trimmed().isEmpty()) {
+			if (error) {
+				*error = QCoreApplication::translate("QETSql",
+					"Une seule requête est autorisée.");
+			}
+			return false;
+		}
+	}
+
+	return true;
+}
+
+} // namespace QETSql

sources/dataBase/sqlreadonly.h

@@ -0,0 +1,43 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef SQLREADONLY_H
+#define SQLREADONLY_H
+
+#include <QString>
+
+struct sqlite3;
+
+/**
+	Deciding whether a piece of SQL only reads.
+
+	Deliberately its own translation unit, depending on nothing but QString
+	and SQLite: it is the enforcement point for every query QElectroTech
+	runs against a project database, including queries that arrive from
+	outside the application (a .qet file's saved report/table query), so it
+	is worth being able to test it in isolation -- see
+	tests/qttest/tst_sqlreadonly.cpp, which links this file and nothing
+	else of QElectroTech.
+*/
+namespace QETSql {
+
+	bool isSingleReadOnlyStatement(sqlite3 *handle,
+				       const QString &query,
+				       QString *error = nullptr);
+}
+
+#endif // SQLREADONLY_H

sources/diagramcommands.cpp

@@ -77,6 +77,23 @@ void PasteDiagramCommand::redo()
 	{
 		first_redo = false;
 
+		//Resolve a linked master/slave pair pasted together (bugtracker
+		//#607) before anything below renews their uuids: at this exact
+		//moment a pasted element's tmp_uuids_link still holds its
+		//source's original partner uuid, which still equals the
+		//not-yet-renewed uuid of that partner's own pasted copy if it
+		//was carried along in the same batch. Scoped to this batch only
+		//(not a project-wide search), so a pair pasted together links to
+		//each other and not to an original element left elsewhere that
+		//happens to still carry that same soon-to-be-replaced uuid. If
+		//only one half of a linked group was pasted, its link entry
+		//simply finds no match here and is dropped -- same "leave it
+		//unlinked" outcome as always.
+		const QList <Element *> elmts_list = content.m_elements;
+		for (Element *e : elmts_list) {
+			e->initLink(elmts_list);
+		}
+
 		//make new uuid for every pasted conductor, because old uuid are
 		//the uuid of the copied conductor
 		const QList <Conductor *> all_pasted_conductors = content.conductors();
@@ -85,7 +102,6 @@ void PasteDiagramCommand::redo()
 		}
 
 		//this is the first paste, we do some actions for the new element
-		const QList <Element *> elmts_list = content.m_elements;
 		for (Element *e : elmts_list)
 		{
 			//make new uuid, because old uuid are the uuid of the copied element

sources/diagramcontext.cpp

@@ -151,8 +151,8 @@ bool DiagramContext::operator!=(const DiagramContext &dc) const
 void DiagramContext::toXml(QDomElement &e, const QString &tag_name) const
 {
 	foreach (QString key, keys()) {
-		if ((tag_name == "elementInformation") &&
-			(m_content[key].toString().trimmed().isEmpty())) {
+		const QString raw = m_content[key].toString();
+		if ((tag_name == "elementInformation") && raw.trimmed().isEmpty()) {
 			continue;
 		}
 		QDomElement property = e.ownerDocument().createElement(tag_name);
@@ -161,7 +161,15 @@ void DiagramContext::toXml(QDomElement &e, const QString &tag_name) const
 		property.removeAttribute("name");
 		property.setAttribute("show", m_content_show[key]);
 		property.setAttribute("name", key);
-		QDomText value = e.ownerDocument().createTextNode(m_content[key].toString().trimmed());
+		// Trim stray leading/trailing whitespace around real content, but
+		// not a value that IS whitespace: unconditionally trimming an
+		// all-whitespace string collapses it to "", which is silently
+		// indistinguishable from a value that was never set. A title-block
+		// custom variable set to a single space -- a workaround for #973,
+		// where an unset variable renders as its own literal placeholder --
+		// would otherwise vanish on the very next save.
+		const QString stored = raw.trimmed().isEmpty() ? raw : raw.trimmed();
+		QDomText value = e.ownerDocument().createTextNode(stored);
 		property.appendChild(value);
 		e.appendChild(property);
 	}

sources/diagramevent/diagrameventaddpaste.cpp

@@ -22,6 +22,7 @@
 #include "../qetapp.h"
 #include "../qetdiagrameditor.h"
 #include "../qetgraphicsitem/conductor.h"
+#include "../qetproject.h"
 
 #include <QSettings>
 
@@ -40,6 +41,7 @@
 	DiagramEventAddPaste::DiagramEventAddPaste(Diagram *diagram, const QPointF &start_pos) :
 	DiagramEventInterface(diagram)
 {
+	Q_UNUSED(start_pos);  // items stay at their original XML position
 		//DiagramEventInterface::init() is called by Diagram::setEventInterface
 		//only when it is replacing an earlier interface, so call it here as
 		//DiagramEventAddMacro does.
@@ -51,8 +53,25 @@
 	QDomDocument document_xml;
 	if (!document_xml.setContent(clipboard_text)) return;
 
+		//Batch the database work the same way project loading does
+		//(QETProject::readProjectXml): without this, every addItem()
+		//below emits dataBaseUpdated(), which makes each connected
+		//table model re-run its full SQL query -- ~77 queries for a
+		//typical paste, i.e. the multi-second stall on Ctrl+V.
+	auto *db = m_diagram->project() ? m_diagram->project()->dataBase() : nullptr;
+	if (db) {
+		db->blockSignals(true);
+		db->setUpdateBlocked(true);
+	}
+
 		//Load items at their original XML coordinates.
 	m_diagram->fromXml(document_xml, QPointF(), false, &m_content);
+
+	if (db) {
+		db->blockSignals(false);
+		db->setUpdateBlocked(false);
+		db->updateDB();
+	}
 	if (!m_content.count()) return;
 
 	const QList<QGraphicsItem *> movable = m_content.items(MovableItems);
@@ -85,33 +104,23 @@
 	};
 	const QPointF grid_origin = snapGrid(top_left);
 
-		//Move the group to the cursor, rather than the cursor to the
-		//group. Both put the copy under the pointer, but warping the
-		//pointer also drags it back to the original's position, so the
-		//copy appears exactly on top of what was copied until the mouse
-		//is moved -- which is the thing pasting under the cursor was
-		//meant to avoid (issue #913). Taking the pointer away from
-		//where the user put it is also its own surprise.
-	m_group_origin = snapGrid(start_pos);
-	const QPointF offset = m_group_origin - grid_origin;
-
-		//Store each item's position after the move. moveTo() applies a
+		//Store each item's original position.  moveTo() applies a
 		//grid-snapped delta from the baseline to these, so items
 		//preserve their layout and move in whole grid steps.
 	for (auto *item : movable) {
-		item->setPos(item->pos() + offset);
 		m_relative_pos.insert(item, item->pos());
 	}
+	m_group_origin = grid_origin;
 
-		//The conductors were laid out against the old terminal
+		//The conductors were laid out against the original terminal
 		//positions, so re-route them before anything is drawn.
 	const QList<Conductor *> conductors = m_content.conductors(DiagramContent::AnyConductor);
 	for (auto *conductor : conductors) {
 		conductor->updatePath();
 	}
 
-		//The baseline is known now, so moveTo() does not have to
-		//capture one from the first mouse movement.
+		//The baseline is the group's grid-snapped origin, so moveTo()
+		//does not have to capture one from the first mouse movement.
 	m_initial_cursor = m_group_origin;
 	m_baseline_captured = true;
 
@@ -125,6 +134,14 @@
 			if (const auto qde = QETApp::diagramEditorAncestorOf(view)) {
 				m_status_bar = qde->statusBar();
 			}
+				//Warp the cursor to the group's grid-snapped origin so
+				//the actual cursor position matches m_initial_cursor.
+				//Without this the first mouseMoveEvent computes a large
+				//delta (cursor is still at the Ctrl+V press location)
+				//and the items jump on first touch.
+			const QPoint view_pos = view->mapFromScene(m_initial_cursor);
+			const QPoint global_pos = view->viewport()->mapToGlobal(view_pos);
+			QCursor::setPos(global_pos);
 		}
 	}
 	showHint();

sources/diagramview.cpp

@@ -445,6 +445,82 @@ void DiagramView::pasteHere()
 	paste(mapToScene(m_paste_here_pos));
 }
 
+/**
+	@brief DiagramView::duplicate
+	Copy the current selection and place the copy at @p stepOffset grid
+	steps from it, landing immediately rather than following the cursor
+	like Ctrl+V does (bugtracker #991). @p stepOffset comes from
+	DuplicateOffsetDialog: (1, 0) is one grid step right, (0, -1) is one
+	grid step up, and so on -- QET's own scene axes, X right and Y down.
+
+	No interactive placement step on purpose: the point of a duplicate
+	shortcut is unattended, repeatable stamping (configure the offset
+	once, then tap Ctrl+D to lay out a row), which following the cursor
+	would interrupt on every press. QET already reselects whatever a
+	paste just added (see PasteDiagramCommand::redo()), so the next
+	Ctrl+D naturally continues from the copy just placed, not the
+	original -- a press-and-hold row falls out of that for free, with no
+	special-casing needed here for "keep going from the last one".
+
+	The offset is applied by hand rather than by asking paste()/
+	Diagram::fromXml() to place the copy at a target position. Both of
+	those feed the position through Diagram::snapToGrid(), which reads
+	QApplication::keyboardModifiers() and rounds to the nearest PIXEL
+	instead of the grid whenever Ctrl is held -- and Ctrl is always held
+	here, this action's own shortcut being Ctrl+D. Measured the hard way
+	before settling on this: routing the offset through paste() first
+	produced copies off-grid on both axes, by an amount that tracked the
+	selection's own bounding-box geometry rather than being a fixed
+	error. fromXml() is instead called with no position at all, which
+	leaves every item at its source coordinates (landing the copy
+	exactly on top of the originals -- (0, 0) is not a position, this is
+	"keep the source coordinates"), and the offset is added directly
+	with setPos(). A plain addition cannot be off by a rounding rule
+	that never runs.
+
+	Conductors are not in the translated set: fromXml() itself does not
+	reposition them either -- they are loaded from XML after elements
+	are already in their final place and take their geometry from their
+	terminals, which have already moved with the elements that own
+	them. Likewise dynamic element texts are not translated separately:
+	they are children of their element and move with it under Qt's
+	normal parent-child transform.
+*/
+void DiagramView::duplicate(const QPoint &stepOffset)
+{
+	if (!isInteractive() || m_diagram->isReadOnly()) return;
+
+	const QList<QGraphicsItem *> selection = m_diagram->selectedItems();
+	if (selection.isEmpty()) return;
+
+	QSettings settings;
+	const int x_grid = settings.value(QStringLiteral("diagrameditor/Xgrid"),
+									  Diagram::xGrid).toInt();
+	const int y_grid = settings.value(QStringLiteral("diagrameditor/Ygrid"),
+									  Diagram::yGrid).toInt();
+	const QPointF offset(stepOffset.x() * x_grid, stepOffset.y() * y_grid);
+
+	// Mirrors copy(), but does not touch the system clipboard: Ctrl+D
+	// should not clobber whatever the user last copied with Ctrl+C.
+	QDomDocument document = m_diagram->toXml(false, true);
+
+	DiagramContent pasted;
+	// No position argument -- see the function comment above for why
+	// the offset is not passed here.
+	m_diagram->fromXml(document, QPointF(), false, &pasted);
+	if (!pasted.count()) return;
+
+	const int movable = DiagramContent::Elements | DiagramContent::TextFields
+					   | DiagramContent::Images | DiagramContent::Shapes
+					   | DiagramContent::Tables | DiagramContent::TerminalStrip;
+	for (QGraphicsItem *item : pasted.items(movable))
+		item->setPos(item->pos() + offset);
+
+	m_diagram->clearSelection();
+	m_diagram->undoStack().push(new PasteDiagramCommand(m_diagram, pasted));
+	adjustSceneRect();
+}
+
 /**
 	Manage the events press click :
 	 *  click to add an independent text field
@@ -1401,7 +1477,7 @@ void DiagramView::createTemplateFromSelection()
 
 				collection_node.appendChild(collection_elmt);
 			} else {
-				qDebug() << "Warnung: Konnte XML-Definition für" << old_type << "nicht laden.";
+				qDebug() << "Warning: could not load XML definition for" << old_type;
 			}
 		}
 	}

sources/diagramview.h

@@ -137,6 +137,7 @@ class DiagramView : public PaletteGraphicsView
 		void copy();
 		void paste(const QPointF & = QPointF(), QClipboard::Mode = QClipboard::Clipboard);
 		void pasteHere();
+		void duplicate(const QPoint &stepOffset);
 		void adjustSceneRect();
 		void updateWindowTitle();
 		void resetConductors();

sources/editor/ui/elementpropertieseditorwidget.cpp

@@ -17,6 +17,7 @@
 */
 #include "elementpropertieseditorwidget.h"
 
+#include "../../qet.h"
 #include "../../qetapp.h"
 #include "../../qetinformation.h"
 #include "ui_elementpropertieseditorwidget.h"
@@ -185,13 +186,13 @@ void ElementPropertiesEditorWidget::upDateInterface()
 
 		const DiagramContext &info = m_data.m_informations;
 		ui->m_auto_num_locked_cb->setChecked(
-			info.value(QStringLiteral("auto_num_locked")).toString() == QLatin1String("true"));
+			QET::infoFlagIsTrue(info.value(QStringLiteral("auto_num_locked")).toString()));
 		ui->m_potential_isolating_cb->setChecked(
-			info.value(QStringLiteral("potential_isolating")).toString() == QLatin1String("true"));
+			QET::infoFlagIsTrue(info.value(QStringLiteral("potential_isolating")).toString()));
 	}
 
 	ui->m_exclude_from_bom_cb->setChecked(
-		m_data.m_informations.value(QStringLiteral("exclude_from_bom")).toString() == QLatin1String("true"));
+		QET::infoFlagIsTrue(m_data.m_informations.value(QStringLiteral("exclude_from_bom")).toString()));
 
 	on_m_base_type_cb_currentIndexChanged(ui->m_base_type_cb->currentIndex());
 }

sources/editor/ui/qetelementeditor.cpp

@@ -25,6 +25,8 @@
 #include "../../qetapp.h"
 #include "../../qetmainwindow.h"
 #include "../../recentfiles.h"
+#include "../../elementscollectioncache.h"
+#include "../../factory/elementpicturefactory.h"
 #include "../graphicspart/customelementpart.h"
 #include "../elementitemeditor.h"
 #include "../styleeditor.h"
@@ -348,6 +350,24 @@ bool QETElementEditor::toLocation(const ElementsLocation &location)
 									 tr("Impossible d'enregistrer l'élément", "message box content"));
 		return(false);
 	}
+
+		//setXml() just wrote the new drawing to disk, but the preview shown
+		//in the elements panel comes from two caches keyed by path+uuid that
+		//nothing here has told about the change: ElementPictureFactory's
+		//in-memory picture cache and ElementsCollectionCache's on-disk
+		//SQLite cache (see ElementsLocation::icon()). locationWasSaved()
+		//(elementscollectionwidget.cpp) re-reads the icon right after this
+		//call returns, but both caches still hand back the pre-edit pixmap,
+		//so the panel keeps showing the stale preview until the whole
+		//collection is reloaded. Drop and rebuild them here.
+	ElementPictureFactory::instance()->dropCache(location);
+	if (ElementsCollectionCache *cache = QETApp::collectionCache()) {
+		if (cache->fetchData(location)) {
+			cache->cacheName(location.toString(), location.uuid());
+			cache->cachePixmap(location.toString(), location.uuid());
+		}
+	}
+
 	return(true);
 }
 

sources/elementspanelwidget.cpp

@@ -674,6 +674,27 @@ void ElementsPanelWidget::duplicateDiagram()
 		bool erase_labels = settings.value(
 			"diagramcommands/erase-label-on-copy", true).toBool();
 
+		// Resolve a linked pair duplicated together against each other
+		// (bugtracker #607) before the loop below renews their uuids or
+		// clears their pending links: at this exact moment a copy's
+		// tmp_uuids_link still holds its source's original partner
+		// uuid, which still equals the not-yet-renewed uuid of that
+		// partner's own copy if both were duplicated together. Scoped
+		// to this diagram's own copies, not a project-wide search, so
+		// this never links back to the source elements the copies were
+		// made from -- if only one half of a linked pair is here, its
+		// link entry simply finds no match and is dropped, same as
+		// clearPendingLinks() used to do unconditionally for every copy.
+		QList<Element *> new_elements;
+		for (QGraphicsItem *item : new_diagram->items()) {
+			if (Element *elmt = dynamic_cast<Element *>(item)) {
+				new_elements << elmt;
+			}
+		}
+		for (Element *elmt : new_elements) {
+			elmt->initLink(new_elements);
+		}
+
 		for (QGraphicsItem *item : new_diagram->items()) {
 			if (Element *elmt = dynamic_cast<Element *>(item)) {
 				// The XML round-trip kept the source elements' uuids. Give the
@@ -695,9 +716,9 @@ void ElementsPanelWidget::duplicateDiagram()
 					new_diagram->restoreText(elmt);
 				}
 
-				// Clear pending links so copies don't link back to
-				// the source elements via stale UUIDs.
-				elmt->clearPendingLinks();
+				// initLink() above already cleared tmp_uuids_link for
+				// every copy, matched or not -- nothing left here that
+				// could link back to a stale source uuid.
 
 				// Clean up copied element data:
 				// 1. Slaves always lose label/formula/comment/location

sources/factory/qetgraphicstablefactory.h

@@ -32,8 +32,14 @@ class QetGraphicsTableFactory
 
 		static void createAndAddNomenclature(Diagram *diagram);
 		static void createAndAddSummary(Diagram *diagram);
-	private:
+			// Public so a caller that has already built and configured an
+			// AddTableDialog itself (never shown or exec'd -- the two
+			// methods above always exec() one, which the scripting API
+			// cannot use headlessly) can create a table from it directly.
+			// create() only reads settings already on the dialog; nothing
+			// about it depends on the dialog having been shown.
 		static void create(Diagram *diagram, AddTableDialog *dialog);
+	private:
 		static QetGraphicsTableItem *newTable(
 				Diagram *diagram,
 				AddTableDialog *dialog,

sources/factory/ui/addtabledialog.cpp

@@ -72,6 +72,15 @@ bool AddTableDialog::adjustTableToFolio() const
 	return ui->m_adjust_table_size_cb->isChecked();
 }
 
+/**
+	@brief AddTableDialog::setAdjustTableToFolio
+	@param set
+*/
+void AddTableDialog::setAdjustTableToFolio(bool set)
+{
+	ui->m_adjust_table_size_cb->setChecked(set);
+}
+
 /**
 	@brief AddTableDialog::addNewTableToNewDiagram
 	@return
@@ -81,6 +90,15 @@ bool AddTableDialog::addNewTableToNewDiagram() const
 	return ui->m_add_table_and_folio->isChecked();
 }
 
+/**
+	@brief AddTableDialog::setAddNewTableToNewDiagram
+	@param set
+*/
+void AddTableDialog::setAddNewTableToNewDiagram(bool set)
+{
+	ui->m_add_table_and_folio->setChecked(set);
+}
+
 /**
 	@brief AddTableDialog::tableName
 	@return
@@ -90,6 +108,18 @@ QString AddTableDialog::tableName() const
 	return ui->m_table_name_le->text();
 }
 
+/**
+	@brief AddTableDialog::setTableName
+	Set the name field directly, so a caller that builds this dialog to
+	read from (never shows or execs it -- the scripting API's addTable())
+	does not need a name typed by a user who was never there to type one.
+	@param name
+*/
+void AddTableDialog::setTableName(const QString &name)
+{
+	ui->m_table_name_le->setText(name);
+}
+
 /**
 	@brief AddTableDialog::headerMargins
 	@return

sources/factory/ui/addtabledialog.h

@@ -44,9 +44,12 @@ class AddTableDialog : public QDialog
 
 		void setQueryWidget(QWidget *widget);
 		bool adjustTableToFolio() const;
+		void setAdjustTableToFolio(bool set);
 		bool addNewTableToNewDiagram() const;
+		void setAddNewTableToNewDiagram(bool set);
 
 		QString tableName() const;
+		void setTableName(const QString &name);
 
 		QMargins headerMargins() const;
 		Qt::Alignment headerAlignment() const;

sources/main.cpp

@@ -22,6 +22,8 @@
 #include "logging/eventloopwatchdog.h"
 #include "logging/qetlogger.h"
 #include "machine_info.h"
+#include "diagram.h"
+#include "palettegraphicsview.h"
 #include "qet.h"
 #include "qetapp.h"
 #include "qetmessagebox.h"
@@ -31,6 +33,7 @@
 
 #include <QApplication>
 #include <QDomImplementation>
+#include <QFont>
 
 #include <QStyleFactory>
 #include <QtConcurrentRun>
@@ -105,6 +108,19 @@ int main(int argc, char **argv)
 	// from Qt 6.12 on; opt in explicitly for older Qt 5/6.
 	QDomImplementation::setInvalidDataPolicy(
 		QDomImplementation::ReturnNullNode);
+
+#ifdef Q_OS_WIN
+	// "MS Shell Dlg 2" is not a font but a Windows alias, and many projects
+	// and settings saved on Windows carry it. Qt 5's GDI font backend let
+	// Windows resolve it to Tahoma; Qt 6's DirectWrite backend does not know
+	// the alias and falls back to Arial, so those texts come out heavier on
+	// screen and in exported PDFs (bugtracker #340). Resolve both aliases
+	// the way Windows does. Done before any application object exists so
+	// that the headless export and scripting runs below get it too.
+	QFont::insertSubstitution("MS Shell Dlg 2", "Tahoma");
+	QFont::insertSubstitution("MS Shell Dlg", "Microsoft Sans Serif");
+#endif
+
 	//Creation and execution of the application
 	//HighDPI
 	qputenv("QT_ENABLE_HIGHDPI_SCALING", "1");
@@ -144,6 +160,22 @@ int main(int argc, char **argv)
 #endif
 	}
 
+	// Re-apply the sheet background last picked in the diagram editor, so
+	// every project opened from here on -- existing or new, whichever one
+	// it is -- draws that background instead of the built-in default that
+	// would otherwise force the user to pick it again after each start.
+	//
+	// Done here rather than in main()'s first lines on purpose: the
+	// headless export and scripting runs above return before reaching
+	// this point and must keep rendering on plain white. It also has to
+	// happen before QETApp is constructed below, since that constructor
+	// already loads the projects given on the command line.
+	{
+		const QetSettings::SheetBackground sheet_background = QetSettings::sheetBackground();
+		PaletteGraphicsView::setCustomBackgroundColor(sheet_background.custom);
+		Diagram::background_color = sheet_background.color;
+	}
+
 	// Resolve the logger's state (log directory, session filename, open
 	// file handle) explicitly here, immediately before installing the
 	// handler -- not implicitly on whichever thread happens to log

sources/qet.cpp

@@ -20,6 +20,7 @@
 #include "qeticons.h"
 #include "shortcutmanager.h"
 
+#include <cmath>
 #include <limits>
 #include <QBuffer>
 #include <QColorDialog>
@@ -244,10 +245,33 @@ bool QET::attributeIsAReal(
 	bool ok;
 	qreal tmp = e.attribute(nom_attribut).toDouble(&ok);
 	if (!ok) return(false);
+	// QString::toDouble() sets ok=true for "nan"/"inf"/"-inf" -- these
+	// parse successfully but are not usable coordinates. A non-finite
+	// element/terminal position reaches Conductor::shape() during load
+	// and hangs there at 100% CPU inside QPainterPathStroker::createStroke(),
+	// confirmed with gdb: not a blocked wait, genuine unbounded computation.
+	if (!std::isfinite(tmp)) return(false);
 	if (reel != nullptr) *reel = tmp;
 	return(true);
 }
 
+/**
+	@brief QET::infoFlagIsTrue
+	@see the header comment for why this exists rather than a bare
+	== "true" comparison.
+	@param value the raw elementInformations string to test
+	@return true if @p value, trimmed and case-folded, is one of the
+	truthy spellings this codebase already accepts elsewhere
+*/
+bool QET::infoFlagIsTrue(const QString &value)
+{
+	const QString v = value.trimmed().toLower();
+	return v == QLatin1String("true")
+		|| v == QLatin1String("1")
+		|| v == QLatin1String("yes")
+		|| v == QLatin1String("on");
+}
+
 /**
 	@brief QET::ElementsAndConductorsSentence
 	Permet de composer rapidement la proposition "x elements et y conducteurs"

sources/qet.h

@@ -161,6 +161,22 @@ namespace QET {
 	bool orthogonalProjection(const QPointF &, const QLineF &, QPointF * = nullptr);
 	bool attributeIsAnInteger(const QDomElement &, const QString& , int * = nullptr);
 	bool attributeIsAReal(const QDomElement &, const QString& , qreal * = nullptr);
+		/**
+			Whether an elementInformations flag (auto_num_locked,
+			potential_isolating, exclude_from_bom, ...) counts as "on".
+			Case-insensitive and tolerant of surrounding whitespace, and
+			accepts the same set of truthy spellings ("true", "1", "yes",
+			"on") that element_nomenclature_view's SQL predicate for
+			exclude_from_bom already does -- see
+			projectDataBase::createElementNomenclatureView(). These flags
+			are only ever written by this app's own checkboxes as literal
+			"true"/"false" today, but a bare == "true" comparison silently
+			treats anything else -- "True", "TRUE", a trailing space from
+			a hand-edited file, a value some other tool wrote -- as off,
+			with no error and no visible difference from the checkbox
+			being genuinely unticked (discussion #785).
+		*/
+	bool infoFlagIsTrue(const QString &value);
 	QString ElementsAndConductorsSentence(int elements=0,
 										  int conductors=0,
 										  int indi_texts=0,

sources/qetapp.cpp

@@ -167,9 +167,7 @@ QETApp::QETApp() :
 	if (m_splash_screen) {
 		m_splash_screen -> hide();
 	}
-
-	checkBackupFiles();
-
+    
 #ifdef QET_SPACEMOUSE_SUPPORT
 		//Always safe to construct: it silently does nothing when spacenavd
 		//isn't running or no device is attached, which is the common case
@@ -177,6 +175,17 @@ QETApp::QETApp() :
 		//SpaceMouseListener's class comment.
 	m_space_mouse_listener = new SpaceMouseListener(this);
 #endif
+
+		//Deferred so this constructor returns before the prompts appear.
+		//checkBackupFiles() opens modal dialogs, and main() still has work to
+		//do once we return -- in particular connecting
+		//SingleApplication::receivedMessage to receiveMessage(). While those
+		//prompts were up that connection did not exist yet, so a file handed
+		//to the already-running instance during start-up was accepted by the
+		//socket and then dropped on the floor.
+	QMetaObject::invokeMethod(this, [this]() {
+		checkBackupFiles();
+	}, Qt::QueuedConnection);
 }
 
 /**
@@ -1828,6 +1837,81 @@ void QETApp::useSystemPalette(bool use) {
 	QET::Palette::refreshStyleSheets();
 }
 
+/**
+	@brief QETApp::useCustomPalette
+	Apply a user-chosen color as the application-wide palette.
+	Builds a full QPalette from \a color, keeping the system palette
+	as a fallback for roles we don't touch.
+	@param color the user-chosen base color
+*/
+void QETApp::useCustomPalette(const QColor &color) {
+	if (!color.isValid())
+		return;
+
+	// Derive readable text colors from the chosen color.
+	const bool dark = color.lightness() < 128;
+	const QColor text = dark ? QColor(220, 220, 220) : QColor(30, 30, 30);
+	const QColor disabled_text = dark ? QColor(175, 175, 175) : QColor(128, 128, 128);
+
+	// Slightly lighter/darker for button and window shading.
+	QColor button = color;
+	button = QColor::fromHslF(color.hslHueF(),
+				  color.hslSaturationF(),
+				  dark ? qMin(color.lightnessF() + 0.08, 1.0)
+				       : qMax(color.lightnessF() - 0.08, 0.0));
+	QColor light = QColor::fromHslF(color.hslHueF(),
+					color.hslSaturationF(),
+					dark ? qMin(color.lightnessF() + 0.15, 1.0)
+					     : qMax(color.lightnessF() - 0.15, 0.0));
+	QColor mid = QColor::fromHslF(color.hslHueF(),
+				     color.hslSaturationF(),
+				     dark ? qMin(color.lightnessF() + 0.04, 1.0)
+				          : qMax(color.lightnessF() - 0.04, 0.0));
+	QColor dark_c = QColor::fromHslF(color.hslHueF(),
+					 color.hslSaturationF(),
+					 dark ? qMin(color.lightnessF() - 0.04, 1.0)
+					      : qMax(color.lightnessF() - 0.12, 0.0));
+	QColor shadow = QColor::fromHslF(color.hslHueF(),
+					 color.hslSaturationF(),
+					 dark ? qMin(color.lightnessF() - 0.10, 1.0)
+					      : qMax(color.lightnessF() - 0.20, 0.0));
+
+	QPalette p;
+	// Active and Inactive get the same colors; only Disabled differs.
+	for (auto group : {QPalette::Active, QPalette::Inactive}) {
+		p.setColor(group, QPalette::Window,          color);
+		p.setColor(group, QPalette::WindowText,      text);
+		p.setColor(group, QPalette::Base,            color);
+		p.setColor(group, QPalette::AlternateBase,   button);
+		p.setColor(group, QPalette::Text,            text);
+		p.setColor(group, QPalette::Button,          button);
+		p.setColor(group, QPalette::ButtonText,      text);
+		p.setColor(group, QPalette::BrightText,      dark ? QColor(255,90,90) : Qt::white);
+		p.setColor(group, QPalette::Highlight,       QColor(30, 96, 176));
+		p.setColor(group, QPalette::HighlightedText, Qt::white);
+		p.setColor(group, QPalette::ToolTipBase,     button);
+		p.setColor(group, QPalette::ToolTipText,     text);
+		p.setColor(group, QPalette::Light,           light);
+		p.setColor(group, QPalette::Midlight,        mid);
+		p.setColor(group, QPalette::Mid,             mid);
+		p.setColor(group, QPalette::Dark,            dark_c);
+		p.setColor(group, QPalette::Shadow,          shadow);
+#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
+		p.setColor(group, QPalette::Accent,          QColor(30, 96, 176));
+#endif
+	}
+	p.setColor(QPalette::Disabled, QPalette::WindowText, disabled_text);
+	p.setColor(QPalette::Disabled, QPalette::Text,       disabled_text);
+	p.setColor(QPalette::Disabled, QPalette::ButtonText, disabled_text);
+
+	qApp->setPalette(p);
+	qApp->setStyleSheet(QString());
+
+	// Switch icon theme to match light/dark.
+	applyIconTheme(p);
+	QET::Palette::refreshStyleSheets();
+}
+
 /**
 	@brief QETApp::quitQET
 	Request the closing of all windows;
@@ -2419,7 +2503,13 @@ void QETApp::initStyle()
 
 	//Apply or not the system style
 	QSettings settings;
-	useSystemPalette(settings.value("usesystemcolors", true).toBool());
+	if (settings.value("usesystemcolors", true).toBool()) {
+		useSystemPalette(true);
+	} else if (settings.contains("customapplicationcolor")) {
+		useCustomPalette(QColor(settings.value("customapplicationcolor").toString()));
+	} else {
+		useSystemPalette(false);
+	}
 
 #if defined(Q_OS_MACOS) && QT_VERSION >= QT_VERSION_CHECK(6, 5, 0)
 	// Setting an application palette stops Qt from following the OS

sources/qetapp.h

@@ -276,6 +276,7 @@ class QETApp : public QObject
 		void setMainWindowVisible(QMainWindow *, bool);
 		void invertMainWindowVisibility(QWidget *);
 		void useSystemPalette(bool);
+		void useCustomPalette(const QColor &color);
 		void quitQET();
 		void checkRemainingWindows();
 		void openFiles(const QETArguments &);

sources/qetdiagrameditor.cpp

@@ -52,11 +52,13 @@
 #include "ui/bomexportdialog.h"
 #include "ui/conductorcolortoolbutton.h"
 #include "ui/diagrambgcolorbutton.h"
+#include "ui/duplicateoffsetdialog.h"
 #include "ui/jumptoelementdialog.h"
 #include "ui/diagrampropertieseditordockwidget.h"
 #include "ui/backupdialog.h"
 #include "ui/dialogwaiting.h"
 #include "undocommand/addelementtextcommand.h"
+#include "utils/qetsettings.h"
 #include "utils/qetutils.h"
 #include "undocommand/rotateselectioncommand.h"
 #include "undocommand/rotatetextscommand.h"
@@ -374,6 +376,46 @@ void QETDiagramEditor::setUpActions()
 					new DiagramEventAddPaste(dv->diagram(), start_pos));
 	});
 
+		//Duplicate: copy the selection and place it at a configured,
+		//grid-step offset immediately -- no interactive follow-the-
+		//cursor step, unlike Ctrl+V above. That is deliberate (#991):
+		//the point of a duplicate shortcut is repeatable, unattended
+		//stamping (configure the offset once, then tap Ctrl+D to lay
+		//out a row), which an interactive placement would interrupt on
+		//every press.
+	m_duplicate = new QAction(QET::Icons::EditCopy, tr("Dupli&quer"), this);
+	ShortcutManager::instance().registerAction(m_duplicate, "diagrameditor.duplicate", tr("Éditeur de schémas"), Qt::CTRL | Qt::Key_D);
+	m_duplicate->setStatusTip(tr("Copie la sélection, décalée de l'espacement configuré", "status bar tip"));
+	connect(m_duplicate, &QAction::triggered, [this]() {
+		auto *dv = currentDiagramView();
+		if (!dv || !dv->diagram()) return;
+
+			//Ask the first time only -- every later press reuses whatever
+			//was confirmed then, so the shortcut can be tapped repeatedly
+			//without an interruption each time. m_configure_duplicate
+			//below is the deliberate way back into this dialog.
+		if (!DuplicateOffsetDialog::hasSavedStepOffset()) {
+			DuplicateOffsetDialog dialog(this);
+			if (dialog.exec() != QDialog::Accepted) return;
+			DuplicateOffsetDialog::saveStepOffset(dialog.stepOffset());
+		}
+		dv->duplicate(DuplicateOffsetDialog::savedStepOffset());
+	});
+
+		//Reopens the dialog above on demand, to change the spacing or
+		//direction a later Ctrl+D should use. Enabled unconditionally
+		//(see slot_updateComplexActions()): it only ever writes a
+		//setting, so it does not need a diagram open or anything
+		//selected the way m_duplicate itself does.
+	m_configure_duplicate = new QAction(tr("Configurer la duplication..."), this);
+	m_configure_duplicate->setStatusTip(tr("Choisir l'espacement et la direction utilisés par Dupliquer", "status bar tip"));
+	connect(m_configure_duplicate, &QAction::triggered, [this]() {
+		DuplicateOffsetDialog dialog(this);
+		if (dialog.exec() == QDialog::Accepted) {
+			DuplicateOffsetDialog::saveStepOffset(dialog.stepOffset());
+		}
+	});
+
 		//Reset conductor path
 	m_conductor_reset = new QAction(QET::Icons::ConductorSettings,     tr("Réinitialiser les conducteurs"),        this);
 	ShortcutManager::instance().registerAction(m_conductor_reset, "diagrameditor.conductor_reset", tr("Éditeur de schémas"), Qt::CTRL | Qt::Key_K);
@@ -894,6 +936,7 @@ void QETDiagramEditor::setUpToolBar()
 	main_tool_bar -> addAction(m_cut);
 	main_tool_bar -> addAction(m_copy);
 	main_tool_bar -> addAction(m_paste);
+	main_tool_bar -> addAction(m_duplicate);
 	main_tool_bar -> addSeparator();
 	main_tool_bar -> addAction(m_delete_selection);
 	main_tool_bar -> addAction(m_rotate_selection);
@@ -985,6 +1028,8 @@ void QETDiagramEditor::setUpMenu()
 	menu_edition -> addAction(m_cut);
 	menu_edition -> addAction(m_copy);
 	menu_edition -> addAction(m_paste);
+	menu_edition -> addAction(m_duplicate);
+	menu_edition -> addAction(m_configure_duplicate);
 	menu_edition -> addSeparator();
 		//The same actions the "Ajouter" toolbar holds. They were toolbar-only,
 		//which left them unreachable for anyone working without a mouse: a
@@ -1811,7 +1856,18 @@ void QETDiagramEditor::selectionGroupTriggered(QAction *action)
 			diagram->undoStack().push(c);
 	}
 	else if (value == "rotate_selected_text")
-		diagram->undoStack().push(new RotateTextsCommand(diagram));
+	{
+			//Ask for the angle first, then build the command: the command
+			//itself no longer opens a dialog. Guarding on the selection keeps
+			//the previous behaviour of showing no dialog when there is
+			//nothing to rotate.
+		if (RotateTextsCommand::hasSelectedTexts(diagram))
+		{
+			qreal rotation = 0;
+			if (RotateTextsCommand::askRotation(rotation))
+				diagram->undoStack().push(new RotateTextsCommand(diagram, rotation));
+		}
+	}
 	else if (value == "find_selected_element" && currentElement())
 		findElementInPanel(currentElement()->location());
 	else if (value == "edit_selected_element")
@@ -1947,6 +2003,7 @@ void QETDiagramEditor::slot_updateComplexActions()
 			    << m_find_element
 			    << m_cut
 			    << m_copy
+			    << m_duplicate
 			    << m_delete_selection
 			    << m_rotate_selection
 			    << m_rotate_group_selection
@@ -1976,6 +2033,7 @@ void QETDiagramEditor::slot_updateComplexActions()
 	bool deletable_items = dc.hasDeletableItems();
 	m_cut              -> setEnabled(!ro && copiable_items);
 	m_copy             -> setEnabled(copiable_items);
+	m_duplicate        -> setEnabled(!ro && copiable_items);
 	m_delete_selection -> setEnabled(!ro && deletable_items);
 	m_rotate_selection -> setEnabled(!ro && diagram_->canRotateSelection());
 	m_rotate_group_selection -> setEnabled(!ro && diagram_->canRotateSelection());
@@ -3122,6 +3180,29 @@ void QETDiagramEditor::slot_runScript() {
 	QETProject *project = currentProject();
 	if (!project) return;
 
+	// Scripting is off until somebody says otherwise, so the first use has
+	// to ask. Asking here rather than greying the action out keeps the
+	// feature discoverable: a disabled menu entry tells a user that
+	// something exists and nothing about how to have it.
+	if (!QetSettings::scriptingEnabled()) {
+		const QMessageBox::StandardButton answer = QET::QetMessageBox::question(
+			this,
+			tr("Exécuter un script"),
+			tr("Les scripts sont désactivés.\n\n"
+			   "Un script s'exécute avec vos droits : il peut lire et "
+			   "modifier le projet ouvert et écrire des fichiers. "
+			   "N'exécutez que des scripts dont vous connaissez "
+			   "l'origine.\n\n"
+			   "Activer les scripts ? Ce réglage est modifiable dans "
+			   "Configurer QElectroTech > Général > Projets."),
+			QMessageBox::Yes | QMessageBox::Cancel,
+			QMessageBox::Cancel);
+		if (answer != QMessageBox::Yes) {
+			return;
+		}
+		QetSettings::setScriptingEnabled(true);
+	}
+
 	const QString script_path = QFileDialog::getOpenFileName(
 		this,
 		tr("Exécuter un script"),

sources/qetdiagrameditor.h

@@ -199,6 +199,8 @@ class QETDiagramEditor : public QETMainWindow
 		*undo,				///< Cancel the latest action
 		*redo,				///< Redo the latest cancelled operation
 		*m_paste,			///< Paste clipboard content on the current diagram
+		*m_duplicate,			///< Copy selection, offset by the configured step (#991)
+		*m_configure_duplicate,		///< Reopen the duplicate offset/direction dialog (#991)
 		*m_auto_conductor,		///< Enable/Disable the use of auto conductor
 		*m_auto_break_conductor,	///< Enable/Disable the use of auto break conductor
 		*m_draw_grid,			///< Switch the background grid display or not

sources/qetgraphicsitem/ViewItem/projectdbmodel.cpp

@@ -379,6 +379,21 @@ void ProjectDBModel::fillValue()
 	
 	while (query_.next())
 	{
+		//This query text comes out of the project file, so its result is
+		//not bounded by anything the project actually contains: a
+		//recursive CTE produces rows for as long as anyone reads them.
+		//Without this, opening such a file hangs QElectroTech at 100% CPU
+		//while m_record grows until memory runs out. @see
+		//projectDataBase::MaxResultRows.
+		if (m_record.size() >= projectDataBase::MaxResultRows) {
+			qWarning().noquote()
+				<< "ProjectDBModel: query stopped after"
+				<< projectDataBase::MaxResultRows
+				<< "rows, which is far more than a folio table can show."
+				<< "The table is incomplete. Query:" << m_query;
+			break;
+		}
+
 		QStringList record_;
 		auto i=0;
 		while (query_.value(i).isValid())

sources/qetgraphicsitem/conductor.cpp

@@ -1310,6 +1310,34 @@ const QList<ConductorSegment *> Conductor::segmentsList() const
 	return(segments_vector);
 }
 
+/**
+	@brief Conductor::moveSegment
+	Move one segment of this conductor by (dx, dy), the same primitive
+	handlerMouseMoveEvent()/handlerMouseReleaseEvent() apply on a manual
+	drag -- moveX()/moveY() each silently no-op on the wrong axis or a
+	static (terminal-anchored) segment, so both are always called and
+	whichever applies takes effect. Unlike a drag this commits the whole
+	move as a single undo step.
+	@param index a segmentsList() index
+	@param dx @param dy the movement, in the diagram's own coordinates
+	@return false if index is out of range
+*/
+bool Conductor::moveSegment(int index, qreal dx, qreal dy)
+{
+	const QList<ConductorSegment *> segs = segmentsList();
+	if (index < 0 || index >= segs.count()) return false;
+
+	before_mov_text_pos_ = m_text_item->pos();
+	ConductorSegment *seg = segs.at(index);
+	seg->moveX(dx);
+	seg->moveY(dy);
+	modified_path = true;
+	segmentsToPath();
+	calculateTextItemPosition();
+	saveProfile();
+	return true;
+}
+
 /**
 	@brief Conductor::length
 	@return the length of this conductor

sources/qetgraphicsitem/conductor.h

@@ -114,6 +114,7 @@ class Conductor : public QGraphicsObject
 	public:
 		QVector <QPointF> handlerPoints() const;
 		const QList<ConductorSegment *> segmentsList() const;
+		bool moveSegment(int index, qreal dx, qreal dy);
 
 		void setPropertyToPotential(
 				const ConductorProperties &property,

sources/qetgraphicsitem/dynamicelementtextitem.cpp

@@ -33,6 +33,7 @@
 #include <QDomElement>
 #include <QtCore/qnumeric.h>
 #include <QGraphicsSceneMouseEvent>
+#include <QAbstractTextDocumentLayout>
 
 /**
 	@brief DynamicElementTextItem::DynamicElementTextItem
@@ -732,19 +733,6 @@ void DynamicElementTextItem::paint(QPainter *painter, const QStyleOptionGraphics
 {
 	DiagramTextItem::paint(painter, option, widget);
 
-		//Only ever repositions already-existing sibling items here --
-		//never adds or removes one. paint() runs while QGraphicsScene is
-		//iterating its item list to draw it, and mutating that list mid
-		//-iteration (which addResizeHandles()/removeResizeHandles() do,
-		//through QGraphicsScene::addItem()/removeItem()) crashes. An
-		//earlier version of this fix called them from here and crashed
-		//qelectrotech reproducibly on deselecting a text (SIGABRT); see
-		//refreshResizeHandlesVisibility() for where that now happens
-		//instead -- itemChange(), Qt's own safe hook for exactly this,
-		//already used below for this item's own selection.
-	if (m_left_resize_handle || m_right_resize_handle)
-		updateResizeHandlesPos();
-
 	if (m_frame)
 	{
 		painter->save();
@@ -927,11 +915,17 @@ void DynamicElementTextItem::addResizeHandles()
 
 	for (QetGraphicsHandlerItem *handle : {m_left_resize_handle, m_right_resize_handle})
 	{
-		scene()->addItem(handle);
+			//Children of this text, not free scene items: Qt then carries
+			//them along when the parent element moves, rotates or is
+			//zoomed, and repaints their old and new area in the same
+			//update as this text. Moving free items from paint() instead
+			//left green fragments behind (qelectrotech#1002).
+		handle->setParentItem(this);
 		handle->setColor(Qt::darkGreen);
-		handle->setZValue(zValue() + 1);
 		handle->installSceneEventFilter(this);
 	}
+	m_resize_handles_con = connect(document()->documentLayout(), &QAbstractTextDocumentLayout::documentSizeChanged,
+								   this, &DynamicElementTextItem::updateResizeHandlesPos);
 
 	updateResizeHandlesPos();
 }
@@ -941,6 +935,7 @@ void DynamicElementTextItem::addResizeHandles()
 */
 void DynamicElementTextItem::removeResizeHandles()
 {
+	disconnect(m_resize_handles_con);
 	delete m_left_resize_handle;
 	delete m_right_resize_handle;
 	m_left_resize_handle = nullptr;
@@ -973,8 +968,8 @@ void DynamicElementTextItem::updateResizeHandlesPos()
 		return;
 
 	QRectF br = boundingRect();
-	m_left_resize_handle->setPos(mapToScene(QPointF(br.left(), br.center().y())));
-	m_right_resize_handle->setPos(mapToScene(QPointF(br.right(), br.center().y())));
+	m_left_resize_handle->setPos(br.left(), br.center().y());
+	m_right_resize_handle->setPos(br.right(), br.center().y());
 }
 
 /**

sources/qetgraphicsitem/dynamicelementtextitem.h

@@ -200,6 +200,7 @@ class DynamicElementTextItem : public DiagramTextItem
 		qreal m_resize_original_width = -1;
 		qreal m_resize_baseline_width = -1;
 		qreal m_resize_start_local_x = 0;
+		QMetaObject::Connection m_resize_handles_con;
 };
 
 #endif // DYNAMICELEMENTTEXTITEM_H

sources/qetgraphicsitem/element.cpp

@@ -39,7 +39,9 @@
 #include "elementtextitemgroup.h"
 #include "iostream"
 
+#include <QApplication>
 #include <QCollator>
+#include <QScreen>
 
 static const QString plcTerminalKeys[] = {
 	QETInformation::ELMT_PLC_T1,
@@ -209,6 +211,21 @@ void Element::editProperty()
 		//with the "text" tab of ElementPropertiesWidget,
 		//the ui freeze, until user press escape key
 		dialog.setWindowModality(Qt::WindowModal);
+
+		// A PLC master carries a 6-column IO table: without an explicit
+		// size the dialog falls back to its (cramped) sizeHint, so open it
+		// at three times its natural width instead. The height stays at
+		// the natural one, and the width never exceeds the screen.
+		const ElementData data = elementData();
+		if (data.m_type == ElementData::Master
+			&& data.m_master_type == ElementData::PLC) {
+			const QSize natural = dialog.sizeHint();
+			int width = natural.width() * 3;
+			if (QScreen *screen = QApplication::primaryScreen())
+				width = qMin(width, screen->availableGeometry().width());
+			dialog.resize(width, natural.height());
+		}
+
 		dialog.exec();
 	}
 }
@@ -1369,6 +1386,33 @@ void Element::initLink(QETProject *prj)
 	tmp_uuids_link.clear();
 }
 
+/**
+	@brief Element::initLink
+	Overload resolving tmp_uuids_link against @p candidates instead of a
+	project-wide ElementProvider search -- see the header comment for
+	why the search has to be scoped this way right after a paste or
+	folio-duplication XML round-trip, before uuids are renewed.
+	@param candidates the elements to search for a link partner in
+*/
+void Element::initLink(const QList<Element *> &candidates)
+{
+		// if nothing to link return now
+	if (tmp_uuids_link.isEmpty()) return;
+
+	for (int i = 0; i < tmp_uuids_link.size(); ++i) {
+		for (Element *elmt : candidates) {
+			if (elmt->uuid() == tmp_uuids_link[i].uuid) {
+				elmt->linkToElement(this);
+				if (tmp_uuids_link[i].group_index >= 0) {
+					m_group_index_map[elmt] = tmp_uuids_link[i].group_index;
+				}
+				break;
+			}
+		}
+	}
+	tmp_uuids_link.clear();
+}
+
 /**
  * @brief Element::linkTypeToString
  * \deprecated use instead ElementData::typeToString

sources/qetgraphicsitem/element.h

@@ -207,6 +207,25 @@ class Element : public QetGraphicsItem
 		virtual void unlinkAllElements() {}
 		virtual void unlinkElement(Element *) {}
 		virtual void initLink(QETProject *);
+			/**
+				Resolve tmp_uuids_link against a caller-supplied candidate
+				list instead of a project-wide search (bugtracker #607).
+				Used right after an XML round-trip (paste, folio
+				duplication) and before the pasted/duplicated elements'
+				uuids are renewed: at that moment a copy's tmp_uuids_link
+				still holds its source's original partner uuid, which
+				still matches the not-yet-renewed uuid of that partner's
+				own copy if it was carried along in the same batch.
+				Resolving only within @p candidates -- not the whole
+				project -- is what stops a linked pair pasted together
+				from matching an original element left elsewhere that
+				happens to still carry that same soon-to-be-replaced
+				uuid. If only one half of a linked group is in
+				@p candidates, its entry finds no match and is dropped,
+				same as initLink(QETProject *) leaving an unresolvable
+				link unlinked.
+			*/
+		void initLink(const QList<Element *> &candidates);
 		QList<Element *> linkedElements ();
 
 		int groupIndexForElement(Element *elmt) const;

sources/qetgraphicsitem/terminal.cpp

@@ -16,6 +16,7 @@
 	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "../qetgraphicsitem/terminal.h"
+#include "../qet.h"
 #include "../qetproject.h"
 #include "../conductorautonumerotation.h"
 #include "../diagram.h"
@@ -986,7 +987,7 @@ QList<Terminal *> relatedPotentialTerminal (
 	else if (terminal -> parentElement() -> linkType() & Element::Terminale)
 	{
 		// English: Check if the user activated the potential isolation checkbox for this terminal
-		if (terminal->parentElement()->elementInformations().value(QStringLiteral("potential_isolating")).toString() == QLatin1String("true")) {
+		if (QET::infoFlagIsTrue(terminal->parentElement()->elementInformations().value(QStringLiteral("potential_isolating")).toString())) {
 			// English: Potential is isolated. Return an empty list so it does not propagate to the other side.
 			return QList<Terminal *>();
 		}

sources/qetpalette.cpp

@@ -20,7 +20,9 @@
 #include <QApplication>
 #include <QColor>
 #include <QImage>
+#include <QMdiArea>
 #include <QStyle>
+#include <QTabBar>
 #include <QWidget>
 #include <cmath>
 
@@ -307,4 +309,10 @@ void QET::Palette::refreshStyleSheets()
 	for (QWidget *widget : widgets)
 		if (!widget->styleSheet().isEmpty())
 			widget->setStyleSheet(widget->styleSheet());
+
+	// Force an immediate repaint on tab bars and MDI areas so their text
+	// updates together with the rest of the UI, not one event loop later.
+	for (QWidget *widget : widgets)
+		if (qobject_cast<QTabBar *>(widget) || qobject_cast<QMdiArea *>(widget))
+			widget->update();
 }

sources/qetproject.cpp

@@ -22,7 +22,9 @@
 #include "autoNum/assignvariables.h"
 #include "autoNum/numerotationcontext.h"
 #include "autoNum/numerotationcontextcommands.h"
+#include "autoNum/renumberelementscommand.h"
 #include "diagram.h"
+#include "qetgraphicsitem/element.h"
 #include "qetapp.h"
 #include "qetmessagebox.h"
 #include "qetresult.h"
@@ -40,7 +42,30 @@
 #include <QHash>
 #include <QTimer>
 #include <QtConcurrentRun>
+
+namespace {
+
+/**
+ * @brief Reset numeric fields of a NumerotationContext so renumbering starts at 1.
+ * Keeps non-numeric parts (string/idfolio/folio/plant/locmach/elementline/elementcolumn/elementprefix) unchanged.
+ */
+NumerotationContext resetContextForRenumber(const NumerotationContext &tmpl)
+{
+	NumerotationContext out = tmpl;
+	for (int i = 0; i < out.size(); ++i) {
+		const QStringList parts = out.itemAt(i);
+		if (parts.isEmpty()) continue;
+		const QString type = parts.at(0);
+		if (out.keyIsNumber(type)) {
+			out.replaceValue(i, QStringLiteral("1"));
+		}
+	}
+	return out;
+}
+
+} // namespace
 #include <QtDebug>
+#include <algorithm>
 #include <utility>
 
 static int BACKUP_INTERVAL = 1200000; //interval in ms of backup = 20min
@@ -132,6 +157,9 @@ QETProject::QETProject(const QString &path, QObject *parent) :
 		return;
 	}
 
+		//The file just read already holds everything a crash could lose, so
+		//there is nothing to back up until the project is changed.
+	m_backup_needed = false;
 	init();
 }
 
@@ -258,6 +286,19 @@ void QETProject::init()
 	m_undo_stack = new QUndoStack(this);
 	connect(m_undo_stack, &QUndoStack::cleanChanged, this, &QETProject::undoStackChanged);
 
+		//What counts as a change for writeBackup(): the undo stack moving,
+		//setModified(true), and the embedded collections, which can change
+		//without going through either.
+	const auto backup_needed = [this]() { m_backup_needed = true; };
+	connect(m_undo_stack, &QUndoStack::indexChanged, this, backup_needed);
+	connect(&m_titleblocks_collection, &TitleBlockTemplatesCollection::changed, this, backup_needed);
+	connect(&m_titleblocks_collection, &TitleBlockTemplatesCollection::aboutToRemove, this, backup_needed);
+	connect(m_elements_collection, &XmlElementCollection::elementAdded, this, backup_needed);
+	connect(m_elements_collection, &XmlElementCollection::elementChanged, this, backup_needed);
+	connect(m_elements_collection, &XmlElementCollection::elementRemoved, this, backup_needed);
+	connect(m_elements_collection, &XmlElementCollection::directorieAdded, this, backup_needed);
+	connect(m_elements_collection, &XmlElementCollection::directoryRemoved, this, backup_needed);
+
 	m_save_backup_timer.setInterval(BACKUP_INTERVAL);
 	connect(&m_save_backup_timer, &QTimer::timeout, this, &QETProject::writeBackup);
 	m_save_backup_timer.start();
@@ -334,7 +375,18 @@ QETProject::ProjectState QETProject::openFile(QFile *file)
 		//file without a persisted uuid derives its uuid from them.
 	const QByteArray content = file->readAll();
 	QDomDocument xml_project;
-	if (!xml_project.setContent(content))
+	// PreserveSpacingOnlyNodes: without it, a text node that is entirely
+	// whitespace -- e.g. a title-block custom variable deliberately set to
+	// a single space, the only way to give it a value other than blank
+	// (bugtracker #973) -- is silently dropped by Qt's default parsing,
+	// and QDomElement::text() then returns "" for it exactly as if it had
+	// never been set. Confirmed in isolation: <a> </a> parses to text()=="",
+	// this option makes it text()==" ". Every place in this codebase that
+	// walks a QDomNode's children already filters on isElement() (see
+	// QET::findInDomElement()), so the extra whitespace-only text nodes
+	// this keeps around are inert everywhere but the two elements that
+	// call .text() on themselves -- which is exactly where the bug was.
+	if (!xml_project.setContent(content, QDomDocument::ParseOption::PreserveSpacingOnlyNodes))
 	{
 		if(opened_here) {
 			file->close();
@@ -782,6 +834,109 @@ void QETProject::setCurrrentElementAutonum(QString autoNum) {
 	m_current_element_autonum = std::move(autoNum);
 }
 
+/**
+	@brief QETProject::renumberElementsBySchemeTitle
+	Renumber existing elements by element autonumbering scheme title.
+
+	Elements do not store the scheme title; they store a "formula" (elementInformations["formula"]).
+	This method matches elements to schemes by comparing the stored formula with the formula derived
+	from each scheme's NumerotationContext.
+
+	If scheme_title is empty, all schemes are renumbered. Otherwise only that scheme is renumbered.
+	The operation is undoable.
+*/
+void QETProject::renumberElementsBySchemeTitle(const QString &scheme_title)
+{
+	if (!m_undo_stack) return;
+	if (isReadOnly()) return;
+
+	// Build map: scheme title -> canonical formula
+	QHash<QString, QString> scheme_formula;
+	for (const QString &k : m_element_autonum.keys()) {
+		if (!scheme_title.isEmpty() && k != scheme_title) continue;
+		scheme_formula.insert(k, autonum::numerotationContextToFormula(m_element_autonum.value(k)));
+	}
+	if (scheme_formula.isEmpty()) return;
+
+	// Collect elements per scheme by formula match
+	QHash<QString, QVector<Element*>> by_key;
+	for (Diagram *d : diagrams()) {
+		if (!d) continue;
+		const auto items = d->items();
+		for (QGraphicsItem *it : items) {
+			auto *el = qgraphicsitem_cast<Element*>(it);
+			if (!el) continue;
+			if (el->linkType() == Element::Slave || (el->linkType() & Element::AllReport))
+				continue;
+
+			const QString el_formula = el->elementInformations().value(QStringLiteral("formula")).toString();
+			if (el_formula.isEmpty()) continue;
+
+			QString matched_key;
+			for (auto itf = scheme_formula.constBegin(); itf != scheme_formula.constEnd(); ++itf) {
+				if (itf.value() == el_formula) { matched_key = itf.key(); break; }
+			}
+			if (matched_key.isEmpty()) continue;
+			by_key[matched_key].append(el);
+		}
+	}
+	if (by_key.isEmpty()) return;
+
+	QVector<RenumberElementsCommand::ElementChange> changes;
+	QHash<QString, NumerotationContext> old_ctx;
+	QHash<QString, NumerotationContext> new_ctx;
+
+	for (auto it = by_key.constBegin(); it != by_key.constEnd(); ++it) {
+		old_ctx.insert(it.key(), m_element_autonum.value(it.key()));
+	}
+
+	for (auto it = by_key.begin(); it != by_key.end(); ++it) {
+		const QString key = it.key();
+		auto &elements = it.value();
+		std::sort(elements.begin(), elements.end(), [](Element *a, Element *b){ return comparPos(a, b); });
+
+		NumerotationContext base_tmpl = m_element_autonum.value(key);
+		NumerotationContext nc = resetContextForRenumber(base_tmpl);
+		NumerotationContextCommands ncc(nc);
+
+		for (Element *el : elements) {
+			RenumberElementsCommand::ElementChange ch;
+			ch.element = el;
+			ch.old_infos = el->elementInformations();
+			ch.old_seq = el->sequenceStruct();
+			ch.old_frozen = el->isFreezeLabel();
+			ch.new_frozen = ch.old_frozen; // preserve frozen state
+
+			const QString formula = ch.old_infos.value(QStringLiteral("formula")).toString();
+			autonum::sequentialNumbers new_seq;
+			new_seq.clear();
+			autonum::setSequential(formula, new_seq, nc, el->diagram(), key);
+
+			DiagramContext new_infos = ch.old_infos;
+			new_infos.addValue(QStringLiteral("label"), autonum::AssignVariables::formulaToLabel(formula, new_seq, el->diagram(), el, nullptr));
+			ch.new_infos = new_infos;
+			ch.new_seq = new_seq;
+			changes.append(ch);
+
+			// advance
+			nc = ncc.next();
+			ncc = NumerotationContextCommands(nc);
+		}
+
+		new_ctx.insert(key, nc);
+	}
+
+	if (changes.isEmpty()) return;
+
+	auto *cmd = new RenumberElementsCommand(
+			this,
+			changes,
+			old_ctx,
+			new_ctx,
+			scheme_title.isEmpty() ? tr("Renumber elements") : tr("Renumber elements (%1)").arg(scheme_title));
+	m_undo_stack->push(cmd);
+}
+
 /**
 	@brief QETProject::conductorAutoNumFormula
 	@param key : autonum title
@@ -1553,6 +1708,9 @@ void QETProject::diagramOrderChanged(int old_index, int new_index) {
 	Mark this project as modified and emit the projectModified() signal.
 */
 void QETProject::setModified(bool modified) {
+	if (modified) {
+		m_backup_needed = true;
+	}
 	if (m_modified != modified) {
 		m_modified = modified;
 		emit projectModified(this, m_modified);
@@ -2135,6 +2293,12 @@ void QETProject::writeBackup()
 		//both would write through &m_backup_file on different threads.
 	if (m_backup_future.isRunning())
 		return;
+		//toXml() walks the whole project on the GUI thread, which freezes
+		//big projects for seconds (bugtracker #273, #329). A backup of an
+		//unchanged project would be identical to the last one, so skip it.
+	if (!m_backup_needed)
+		return;
+	m_backup_needed = false;
 		//Capture the document by value (implicitly shared, so cheap): the
 		//Qt5-style QtConcurrent::run(function, reference-args) call did not
 		//survive the Qt6 API change, a lambda behaves identically on both.

sources/qetproject.h

@@ -169,6 +169,20 @@ class QETProject : public QObject
 		QString elementCurrentAutoNum() const;
 		void setCurrrentElementAutonum(QString autoNum);
 
+		/**
+		 * @brief Renumber existing elements by element autonumbering scheme.
+		 *
+		 * Elements do not store the scheme title but they store the corresponding formula.
+		 * This operation matches elements to schemes by comparing the stored formula
+		 * with the formula derived from the scheme's NumerotationContext.
+		 *
+		 * If @p scheme_title is empty, all schemes are renumbered.
+		 * If @p scheme_title is non-empty, only that scheme is renumbered.
+		 *
+		 * The operation is undoable.
+		 */
+		void renumberElementsBySchemeTitle(const QString &scheme_title = QString());
+
 			//Element
 		void freezeExistentElementLabel(bool freeze, int from, int to);
 		void freezeNewElementLabel(bool freeze, int from, int to);
@@ -297,6 +311,8 @@ class QETProject : public QObject
 	private:
 			/// When false, writeBackup() is a no-op (set by the headless CLI)
 		static bool m_backup_enabled;
+			/// Something changed since the last backup, see writeBackup()
+		bool m_backup_needed = true;
 			/// File path this project is saved to
 		QString m_file_path;
 			/// Current state of the project

sources/scripting/qetscriptapi.h

@@ -22,6 +22,7 @@
 #include <QString>
 #include <QStringList>
 #include <QVariantList>
+#include <QVariantMap>
 
 class QETProject;
 class DiagramView;
@@ -30,6 +31,9 @@ class Terminal;
 class Conductor;
 class IndependentTextItem;
 class QetShapeItem;
+class DiagramImageItem;
+class DynamicElementTextItem;
+class QetGraphicsTableItem;
 
 /**
 	@brief The QetScriptApi class
@@ -93,13 +97,18 @@ class QetShapeItem;
 
 	  Terminals are addressed by their @b index in Element::terminals(),
 	  not by uuid, and elementTerminals() prints that indexing so a script
-	  can see what it is about to wire. Terminal uuids look like the
+	  can see what it is about to wire. The index is the terminal's place
+	  in the element's own top-to-bottom, left-to-right ordering, not the
+	  order its definition file lists them. Terminal uuids look like the
 	  obvious key and are not one: Terminal::uuid() is a property of the
 	  catalog .elmt definition, empty for most of the installed base and,
 	  where present, identical across every instance of that element -- so
 	  it does not distinguish one placed coil's A1 from another's.
 	- @b Conductor properties and @b cross-references: set a conductor's
-	  number, formula, colour or section, and link a master to a slave or
+	  number, formula, colour or section (and its look: style normal/
+	  dashed/dashdotted, two-colour mode and second colour, dash size,
+	  line width, text size, whether its number is shown -- all under the
+	  names the .qet file uses for them), and link a master to a slave or
 	  one report to another. Both follow the application's own rules rather
 	  than writing the field: a conductor property is applied to every
 	  conductor of the same electrical potential, which is what the GUI and
@@ -123,7 +132,11 @@ class QetShapeItem;
 	  its circuit -- a free-standing note, a line, a rectangle, an ellipse
 	  -- added with the same AddGraphicsObjectCommand the corresponding GUI
 	  tools use, and changed through the plainText/color/rotation
-	  properties those items already publish.
+	  properties those items already publish. A shape's look is set with
+	  setShapeProperty(): color and fill (a colour name, or "none" for no
+	  fill), width, line-style (solid, dashed, dotted, dashdot) and
+	  rotation, through the pen/brush/rotation properties the shape's own
+	  style editor changes.
 
 	  These are addressed by @b index into a listing sorted by position
 	  (top to bottom, then left to right), because unlike an element they
@@ -150,6 +163,157 @@ class QetShapeItem;
 	  depend on. The underlying tables are how the cache happens to be
 	  arranged today, and a column may move. tables() lists both so a
 	  script can see what it is querying rather than guess.
+	- @b Terminal @b strips: create a strip, put terminal-type elements on
+	  it, remove it. Strips are addressed by index into terminalStrips(),
+	  which is the project's own order (unlike texts and shapes it is not
+	  re-sorted) and does shift when one is removed. Only elements whose
+	  link type is "terminal" can be added, the same restriction the
+	  editor enforces by construction.
+
+	  stripRealTerminals() lists the strip's real terminals -- the actual
+	  wire-ends added by addTerminalToStrip(), one per index -- which
+	  physical position (clamp) each currently sits on and how many
+	  neighbours share it, since that is what groupTerminals() and
+	  bridgeTerminals() address by index into.
+
+	  groupTerminals() merges several real terminals onto one physical
+	  position, choosing the receiving position the same way the terminal
+	  strip editor's own "group" button does: the position among the ones
+	  named that already carries the most real terminals, not necessarily
+	  the first one given -- a script asking to group indices [0, 1] is not
+	  guaranteed index 0's position is where they end up. bridgeTerminals()
+	  wires several real terminals together electrically without merging
+	  their positions, refused (TerminalStrip::isBridgeable()) when they
+	  are not all at the same level -- the same check the editor's bridge
+	  button applies, not a rule reimplemented here. sortTerminalStrip()
+	  reorders the strip's physical positions into the canonical order the
+	  editor's own sort button computes.
+	- @b Tables: a BOM/nomenclature or a summary (table of contents) placed
+	  on a folio, through QetGraphicsTableFactory::create() -- the same
+	  factory call the "add table" menu action makes, minus the modal
+	  AddTableDialog it collects its settings from first. That dialog is
+	  still built here, off-screen and never shown or exec'd: addTable()
+	  calls setTableName() and the query widget's setQuery() on it, the
+	  same as a user filling in the form, and forces its two checkboxes
+	  ("adjust table to folio" and "add a new folio if the table overflows"
+	  it) off regardless of their .ui-file default of checked -- a script
+	  calling addTable() once should create exactly the one table it asked
+	  for, not possibly several spread across folios it never asked to add.
+	  A script that wants either behaviour can resize the result itself or
+	  add its own folio.
+
+	  Neither creating nor deleting a table is undoable:
+	  QetGraphicsTableFactory::newTable(), which create() calls, calls
+	  Diagram::addItem() directly, with no undo command of its own, in the
+	  stock "add table" action as much as here -- a pre-existing gap in the
+	  application, not something introduced by this API. Tables are
+	  addressed by index in a position-sorted listing, like texts, shapes
+	  and images.
+	- @b Auto-numbering: define a named numbering context of kind
+	  "conductor", "element" or "folio", built from parts written
+	  "type[:value[:increase]]" -- types are the ones the auto-numbering
+	  dialog offers (string, unit, ten, hundred, alpha, idfolio, folio,
+	  plant, locmach, elementline, elementcolumn, elementprefix, wrap,
+	  unitfolio, tenfolio, hundredfolio) -- and select which one a folio's
+	  new conductors use. Defining or removing a context is not undoable,
+	  because the application itself does it through direct project calls
+	  and only the counter advance is on the undo stack; the numbering
+	  actually applied to a conductor is.
+
+	  For elements, useElementAutoNum() selects the current context and
+	  numberElement() applies it to one element, as the "add element" tool
+	  does right after placing one. addElement() deliberately does not
+	  number what it places: doing it silently would change what an existing
+	  script produces the moment its project happens to have a context
+	  selected, so it is a separate, explicit call. Folio auto-numbering is
+	  not offered: in the application it spawns whole new folios from a
+	  context, which is a different operation from labelling.
+	- @b Duplicating: copy elements, together with the conductors that run
+	  between them, to a position on the same or another folio, through
+	  Diagram::toXml() and fromXml() and PasteDiagramCommand -- what Ctrl+C
+	  and Ctrl+V do, so a paste behaves as a paste does there: the copies
+	  come without their labels and without their conductors' wire numbers,
+	  which the application clears on paste (measured: '' on both).
+	  The position is the top left of the pasted group's bounding rectangle,
+	  so an element's own origin ends up offset from it by its hotspot
+	  (measured: +20, +30 for a coil); (0, 0) is not a position but means
+	  "keep the source coordinates", as Diagram::fromXml() treats it. The
+	  result lists the copies in the order the elements were named --
+	  the application's own list is in scene order, and a caller pairing by
+	  index would otherwise be wired to the wrong copies -- paired by
+	  position, which a paste preserves, so two elements at the same point
+	  cannot be told apart. A conductor is copied
+	  only if both its ends are among the copied elements. The previous
+	  selection is put back afterwards, since copying works by selecting.
+	- @b Project title and folio frame: setProjectTitle(), and the grid that
+	  frames each folio -- columns and rows, their size, and whether the
+	  headers show (columns, column-width, display-columns, rows, row-height,
+	  display-rows) -- through ChangeBorderCommand. These are the six fields
+	  the folio properties panel offers; the title block's header sizes,
+	  which it does not, are left alone. Changing the project title is not
+	  undoable: the application sets it directly too.
+
+	  A folio's title block @b template is a seventh, separate case:
+	  Diagram::setTitleBlockTemplate() resolves a name only against
+	  QETProject::embeddedTitleBlockTemplatesCollection() -- the same
+	  copy-into-the-project step addElement() already does for elements,
+	  and for the same reason (a project opened on another machine must not
+	  depend on files only this one has). titleBlockTemplates() lists what
+	  is embedded and what is available to embed from the common/company
+	  /custom collections, each name suffixed with its source;
+	  embedTitleBlockTemplate() does the copy (QDomElement in, unmodified,
+	  via *TemplatesCollection::get/setTemplateXmlDescription() -- neither
+	  side is scripting-specific code, both already exist for the template
+	  editor to call). setFolioProperty(folio, "template", name) then
+	  embeds it first if it is not already, refusing only if no collection
+	  has that name at all. Embedding is not undoable, the same as defining
+	  an auto-numbering context is not: the application does both through
+	  direct collection/project calls with no undo command of their own.
+	  A template literally named "default" reads back as folioProperty()
+	  "" afterwards, not "default": BorderTitleBlock::titleBlockTemplateName()
+	  treats the two as the same thing, since "no override" already renders
+	  with the template named "default".
+	- @b Geometry and folio order: elementGeometry() reads where an element
+	  is -- x, y (its origin), rotation, and the box it occupies on the folio
+	  (left, top, right, bottom) -- so a script can lay one thing out relative
+	  to another instead of only setting absolute coordinates, and can check
+	  that a move landed. insertFolio() puts a new folio at a position
+	  instead of at the end, which is what reordering is mostly for while
+	  moving an existing folio still needs the application's project view.
+	- @b Images: place a picture from a file. The pixels are copied into
+	  the project, which stores them inline in the .qet -- the saved file
+	  does not refer to the original path, so it opens on another machine,
+	  and it grows by roughly the size of the image, which is why files
+	  over 10 MB are refused. Images are addressed by index in a
+	  position-sorted listing, like texts and shapes -- by the on-screen
+	  bounding box, so scaling or rotating an image, which turns about its
+	  centre, can change where it sorts. Re-list after either.
+	- @b Element @b texts: the text fields drawn on a symbol -- its label,
+	  the names beside its terminals, any value the definition placed there.
+	  A symbol arrives with the fields its definition gives it; setElementLabel()
+	  fills the value one of them shows, and these methods control the fields
+	  themselves: where each sits, its size, whether it draws a frame, what it
+	  shows, and adding or deleting one. Addressed by index in the element's
+	  own list, which follows the definition's order and shifts when one is
+	  deleted -- and undoing a deletion puts the field back at the end, so
+	  list again after either.
+
+	  Two things called text, which differ for a field bound to an
+	  information key: the @b "text" property is the field's stored string,
+	  which for an information-bound field is an unused placeholder (empty,
+	  or "Texte" once one has been added), and @b "shows" is what is drawn,
+	  which follows the element's information straight away -- compared
+	  against elementInfo() at seven points across relabel, rebinding,
+	  setting and undo, with no difference. Read "shows".
+
+	  Consecutive setElementInfo()/setElementLabel() calls on one element
+	  merge into a single undo step, as ChangeElementInformationCommand
+	  does, so one undo can revert several.
+
+	  A field's @b source is "text" (a fixed string), "info" (the value of one
+	  of the element's information keys, so it follows setElementInfo() and
+	  setElementLabel()) or "composite" (a formula over several). Position is in
+	  the element's own coordinates, not the folio's.
 	- @b Navigating and @b messaging: select an element, zoom the active
 	  view, and show the user a message. Deliberately narrow: selection and
 	  messaging work with no view at all (headless `--run`); zoom is a no-op
@@ -238,16 +402,38 @@ class QetScriptApi : public QObject
 											  int terminalIndex, const QString &property,
 											  const QString &value);
 
+		// -- a conductor's own drawn path, not the whole potential's
+		// properties above -- one conductor only, addressed the same way --
+		Q_INVOKABLE QStringList conductorSegments(int folioIndex, const QString &elementUuid,
+												  int terminalIndex) const;
+		Q_INVOKABLE bool moveConductorSegment(int folioIndex, const QString &elementUuid,
+											  int terminalIndex, int segmentIndex,
+											  double dx, double dy);
+
 		// -- cross-references: master/slave and report links --
 		Q_INVOKABLE QString elementLinkType(int folioIndex, const QString &elementUuid) const;
 		Q_INVOKABLE QStringList linkedElements(int folioIndex, const QString &elementUuid) const;
 		Q_INVOKABLE bool linkElements(int folioIndexA, const QString &elementUuidA,
-									  int folioIndexB, const QString &elementUuidB);
+									  int folioIndexB, const QString &elementUuidB,
+									  int groupIndex = -1);
 		Q_INVOKABLE bool unlinkElement(int folioIndex, const QString &elementUuid);
+		Q_INVOKABLE int elementLinkGroupIndex(int folioIndex, const QString &elementUuid,
+											  int otherFolioIndex, const QString &otherElementUuid) const;
+
+		// -- a PLC master's IO table: address/function/comment rows a PLC
+		// slave links onto via linkElements()'s groupIndex --
+		Q_INVOKABLE QStringList plcIOs(int folioIndex, const QString &elementUuid) const;
+		Q_INVOKABLE int addPlcIO(int folioIndex, const QString &elementUuid, const QString &type,
+								 const QString &address, const QString &functionText,
+								 const QString &comment);
+		Q_INVOKABLE bool setPlcIO(int folioIndex, const QString &elementUuid, int ioIndex,
+								  const QString &property, const QString &value);
+		Q_INVOKABLE bool removePlcIO(int folioIndex, const QString &elementUuid, int ioIndex);
 
 		// -- independent text and drawing shapes --
 		Q_INVOKABLE QStringList texts(int folioIndex) const;
 		Q_INVOKABLE int addText(int folioIndex, const QString &text, double x, double y);
+		Q_INVOKABLE QString textContent(int folioIndex, int textIndex) const;
 		Q_INVOKABLE bool setTextContent(int folioIndex, int textIndex, const QString &text);
 		Q_INVOKABLE bool setTextColor(int folioIndex, int textIndex, const QString &color);
 		Q_INVOKABLE bool setTextRotation(int folioIndex, int textIndex, double angle);
@@ -257,14 +443,97 @@ class QetScriptApi : public QObject
 		Q_INVOKABLE int addShape(int folioIndex, const QString &type,
 								 double x1, double y1, double x2, double y2);
 		Q_INVOKABLE bool deleteShape(int folioIndex, int shapeIndex);
+		Q_INVOKABLE QString shapeProperty(int folioIndex, int shapeIndex, const QString &property) const;
+		Q_INVOKABLE bool setShapeProperty(int folioIndex, int shapeIndex,
+										  const QString &property, const QString &value);
+
+		// -- polygon and path shapes: more than addShape()'s two-point box --
+		Q_INVOKABLE int addPolygon(int folioIndex, const QVariantList &points, bool closed);
+		Q_INVOKABLE QVariantList shapePolygon(int folioIndex, int shapeIndex) const;
+		Q_INVOKABLE bool setShapePolygon(int folioIndex, int shapeIndex, const QVariantList &points);
+		Q_INVOKABLE int addPath(int folioIndex, const QVariantList &nodes, bool closed);
+		Q_INVOKABLE QVariantList shapePathNodes(int folioIndex, int shapeIndex) const;
+		Q_INVOKABLE bool setShapePathNodes(int folioIndex, int shapeIndex, const QVariantList &nodes);
+		Q_INVOKABLE bool setShapeClosed(int folioIndex, int shapeIndex, bool closed);
 
 		// -- query the project database --
 		Q_INVOKABLE QStringList tables() const;
 		Q_INVOKABLE QVariantList query(const QString &sql);
 		Q_INVOKABLE QString queryError() const;
 
+		// -- removing a conductor or a folio; folio properties beyond the title --
+		Q_INVOKABLE bool deleteConductor(int folioIndex, const QString &elementUuid, int terminalIndex);
+		Q_INVOKABLE bool removeFolio(int folioIndex);
+		Q_INVOKABLE bool setFolioProperty(int folioIndex, const QString &property, const QString &value);
+		Q_INVOKABLE QString folioProperty(int folioIndex, const QString &property) const;
+
+		// -- terminal strips (borniers) --
+		Q_INVOKABLE QStringList terminalStrips() const;
+		Q_INVOKABLE int addTerminalStrip(const QString &installation, const QString &location,
+										 const QString &name);
+		Q_INVOKABLE bool removeTerminalStrip(int stripIndex);
+		Q_INVOKABLE bool addTerminalToStrip(int stripIndex, int folioIndex,
+											const QString &elementUuid);
+		Q_INVOKABLE QStringList stripRealTerminals(int stripIndex) const;
+		Q_INVOKABLE bool groupTerminals(int stripIndex, const QVariantList &realTerminalIndices);
+		Q_INVOKABLE bool bridgeTerminals(int stripIndex, const QVariantList &realTerminalIndices);
+		Q_INVOKABLE bool sortTerminalStrip(int stripIndex);
+
+		// -- a BOM/nomenclature or summary table placed on a folio --
+		Q_INVOKABLE QStringList tables(int folioIndex) const;
+		Q_INVOKABLE int addTable(int folioIndex, const QString &kind, const QString &name,
+								 const QString &query);
+		Q_INVOKABLE bool deleteTable(int folioIndex, int tableIndex);
+		Q_INVOKABLE bool setTablePosition(int folioIndex, int tableIndex, double x, double y);
+
+		// -- auto-numbering contexts (conductor, element, folio) --
+		Q_INVOKABLE QStringList autoNums(const QString &kind) const;
+		Q_INVOKABLE bool addAutoNum(const QString &kind, const QString &name, const QStringList &parts);
+		Q_INVOKABLE bool removeAutoNum(const QString &kind, const QString &name);
+		Q_INVOKABLE bool useConductorAutoNum(int folioIndex, const QString &name);
+		Q_INVOKABLE bool useElementAutoNum(const QString &name);
+		Q_INVOKABLE bool numberElement(int folioIndex, const QString &elementUuid);
+
+		// -- images, embedded in the project --
+		Q_INVOKABLE QStringList images(int folioIndex) const;
+		Q_INVOKABLE int addImage(int folioIndex, const QString &filePath, double x, double y);
+		Q_INVOKABLE bool setImageScale(int folioIndex, int imageIndex, double factor);
+		Q_INVOKABLE bool setImageRotation(int folioIndex, int imageIndex, double angle);
+		Q_INVOKABLE bool deleteImage(int folioIndex, int imageIndex);
+		Q_INVOKABLE int addPdfPage(int folioIndex, const QString &pdfPath, int pageNumber,
+								   int dpi, double x, double y);
+
+		// -- the text fields shown on a symbol (label, terminal names, ...) --
+		Q_INVOKABLE QStringList elementTexts(int folioIndex, const QString &elementUuid) const;
+		Q_INVOKABLE int addElementText(int folioIndex, const QString &elementUuid,
+									   const QString &source, const QString &value,
+									   double x, double y);
+		Q_INVOKABLE bool setElementTextProperty(int folioIndex, const QString &elementUuid,
+												int textIndex, const QString &property,
+												const QString &value);
+		Q_INVOKABLE QString elementTextProperty(int folioIndex, const QString &elementUuid,
+												int textIndex, const QString &property) const;
+		Q_INVOKABLE bool deleteElementText(int folioIndex, const QString &elementUuid, int textIndex);
+
+		// -- copy elements (with the conductors between them) to a position --
+		Q_INVOKABLE QStringList duplicateElements(int fromFolioIndex, const QStringList &elementUuids,
+												  int toFolioIndex, double x, double y);
+
+		// -- the project title, and each folio's frame (grid of columns and rows) --
+		Q_INVOKABLE bool setProjectTitle(const QString &title);
+		Q_INVOKABLE QString folioBorder(int folioIndex, const QString &property) const;
+		Q_INVOKABLE bool setFolioBorder(int folioIndex, const QString &property, const QString &value);
+
+		// -- title block templates: which exist, embedding one into the project --
+		Q_INVOKABLE QStringList titleBlockTemplates() const;
+		Q_INVOKABLE bool embedTitleBlockTemplate(const QString &name);
+
+		// -- read an element's geometry --
+		Q_INVOKABLE QVariantMap elementGeometry(int folioIndex, const QString &elementUuid) const;
+
 		// -- folios --
 		Q_INVOKABLE int addFolio();
+		Q_INVOKABLE int insertFolio(int position);
 		Q_INVOKABLE bool setFolioTitle(int folioIndex, const QString &title);
 
 		Q_INVOKABLE bool undo();
@@ -272,9 +541,21 @@ class QetScriptApi : public QObject
 		Q_INVOKABLE bool canUndo() const;
 		Q_INVOKABLE bool canRedo() const;
 
+		// -- project-wide text search & replace, one undo step for the
+		// whole run, in the same spirit as the "Search and replace" panel --
+		Q_INVOKABLE int searchAndReplace(const QString &kind, const QString &field,
+										 const QString &pattern, const QString &replacement,
+										 bool useRegex, bool caseSensitive);
+
+		// -- electrical continuity / ERC: read-only, structural checks
+		// against the live object graph rather than the XML -- see the
+		// .cpp doc comment for exactly what is and is not covered --
+		Q_INVOKABLE QVariantList checkContinuity(int folioIndex);
+
 		// -- navigate and message --
 		Q_INVOKABLE bool selectElement(const QString &elementUuid);
 		Q_INVOKABLE void deselectAll(int folioIndex);
+		Q_INVOKABLE QStringList selectedElements(int folioIndex) const;
 		Q_INVOKABLE bool zoomFit();
 		Q_INVOKABLE bool zoomToContent();
 		Q_INVOKABLE bool zoomReset();
@@ -292,6 +573,10 @@ class QetScriptApi : public QObject
 								 const QString &caller);
 		QList<IndependentTextItem *> sortedTexts(int folioIndex) const;
 		QList<QetShapeItem *> sortedShapes(int folioIndex) const;
+		QList<QetGraphicsTableItem *> sortedTables(int folioIndex) const;
+		QList<DiagramImageItem *> sortedImages(int folioIndex) const;
+		DynamicElementTextItem *findElementText(int folioIndex, const QString &elementUuid,
+												int textIndex, const QString &caller) const;
 		IndependentTextItem *findText(int folioIndex, int textIndex, const QString &caller);
 		bool setInfoKey(int folioIndex, const QString &elementUuid,
 						const QString &key, const QString &value, const QString &caller);

sources/scripting/qetscripting.cpp

@@ -20,6 +20,7 @@
 #include "qetscriptapi.h"
 #include "../qetmessagebox.h"
 #include "../qetproject.h"
+#include "../utils/qetsettings.h"
 
 #include <QFile>
 #include <QFileInfo>
@@ -48,8 +49,33 @@ bool isRunRequest(const QStringList &args)
 
 #ifdef QET_HAS_SCRIPTING
 
+namespace {
+	/**
+		@brief refusalMessage
+		What to tell somebody whose script was not run, and how to change
+		that. Written once because the command line and the graphical
+		editor both need to say it, and an explanation that names only one
+		of the two ways out sends half the people down the wrong path.
+	*/
+	QString refusalMessage()
+	{
+		return QObject::tr(
+			"Les scripts sont désactivés.\n\n"
+			"Un script a accès à l'ensemble du projet et peut écrire des "
+			"fichiers, aussi cette fonction est-elle désactivée par défaut.\n\n"
+			"Pour l'activer : Configurer QElectroTech > Général > Projets, "
+			"ou définir la variable d'environnement QET_ENABLE_SCRIPTING=1 "
+			"pour une exécution sans interface (CI, traitement par lot).");
+	}
+}
+
 int run(const QStringList &args)
 {
+	if (!QetSettings::scriptingEnabled()) {
+		err << refusalMessage() << "\n";
+		return 3;
+	}
+
 	const int idx = args.indexOf(QStringLiteral("--run"));
 	const QString script_path = args.value(idx + 1);
 	const QString project_path = args.value(idx + 2);
@@ -88,6 +114,20 @@ namespace {
 
 bool runOnProject(const QString &scriptPath, QETProject *project, DiagramView *view)
 {
+	// Checked here as well as at each caller, deliberately: this is the
+	// one function that actually evaluates JavaScript, so it is the one
+	// place a future caller cannot forget to ask. The callers check first
+	// only to give a better answer than this one can -- a usable exit code
+	// on the command line, an offer to switch the setting on in the editor.
+	if (!QetSettings::scriptingEnabled()) {
+		err << refusalMessage() << "\n";
+		if (view) {
+			QET::QetMessageBox::warning(nullptr, QObject::tr("Script"),
+						    refusalMessage());
+		}
+		return false;
+	}
+
 	QFile file(scriptPath);
 	if (!file.open(QIODevice::ReadOnly | QIODevice::Text)) {
 		err << "Cannot open script: " << scriptPath << "\n";

sources/ui/conductorcolortoolbutton.cpp

@@ -31,6 +31,7 @@
 #include <QMenu>
 #include <QPainter>
 #include <QPixmap>
+#include <QSet>
 
 namespace {
 	/**
@@ -167,11 +168,22 @@ void ConductorColorToolButton::applyColor(const QColor &color)
 	}
 
 	DiagramContent dc(diagram);
-	const auto conductors = dc.conductors(DiagramContent::AnyConductor);
-	if (conductors.isEmpty()) {
+	const auto selected_conductors = dc.conductors(DiagramContent::AnyConductor);
+	if (selected_conductors.isEmpty()) {
 		return;
 	}
 
+		//A wire drawn across a junction is several Conductor objects
+		//sharing one electrical potential; selecting one segment must
+		//still recolour the whole potential, the way the F2 dialog's
+		//"apply to all" already does.
+	QSet<Conductor *> conductors;
+	for (Conductor *conductor : selected_conductors)
+	{
+		conductors << conductor;
+		conductors += conductor->relatedPotentialConductors();
+	}
+
 	QUndoCommand *undo = new QUndoCommand(tr("Modifier la couleur de %n conducteur(s)",
 						 "undo caption", conductors.count()));
 	int changed = 0;

sources/ui/configpage/generalconfigurationpage.cpp

@@ -23,6 +23,7 @@
 #include "../../utils/qetsettings.h"
 #include "../../utils/qetutils.h"
 #include "../../qetmessagebox.h"
+#include "../nokde/kcolorbutton.h"
 #include <QFileDialog>
 #include <QFontDialog>
 #include <QSettings>
@@ -74,6 +75,12 @@ GeneralConfigurationPage::GeneralConfigurationPage(QWidget *parent) :
 	ui->DiagramEditor_Grid_PointSize_min_sb->setValue(settings.value("diagrameditor/grid_pointsize_min", 1).toInt());
 	ui->DiagramEditor_Grid_PointSize_max_sb->setValue(settings.value("diagrameditor/grid_pointsize_max", 1).toInt());
 	ui->m_use_system_color_cb->setChecked(settings.value("usesystemcolors", "true").toBool());
+	bool sysColors = ui->m_use_system_color_cb->isChecked();
+	ui->m_custom_app_color_kpb->setEnabled(!sysColors);
+	if (settings.contains("customapplicationcolor"))
+		ui->m_custom_app_color_kpb->setColor(QColor(settings.value("customapplicationcolor").toString()));
+	else
+		ui->m_custom_app_color_kpb->setColor(QApplication::palette().color(QPalette::Window));
 	bool tabbed = settings.value("diagrameditor/viewmode", "tabbed") == "tabbed";
 	if(tabbed)
 		ui->m_use_tab_mode_rb->setChecked(true);
@@ -82,6 +89,25 @@ GeneralConfigurationPage::GeneralConfigurationPage(QWidget *parent) :
 	ui->m_zoom_out_beyond_folio->setChecked(settings.value("diagrameditor/zoom-out-beyond-of-folio", false).toBool());
 	ui->m_use_gesture_trackpad->setChecked(settings.value("diagramview/gestures", false).toBool());
 	ui->m_save_label_paste->setChecked(settings.value("diagramcommands/erase-label-on-copy", true).toBool());
+	ui->m_enable_scripting->setChecked(QetSettings::scriptingEnabled());
+#ifdef QET_HAS_SCRIPTING
+	if (QetSettings::scriptingForcedByEnvironment()) {
+			//QET_ENABLE_SCRIPTING wins over the stored value, so let the box
+			//say so rather than offer a tick that changes nothing.
+		ui->m_enable_scripting->setEnabled(false);
+		ui->m_enable_scripting->setToolTip(
+					tr("Activé par la variable d'environnement "
+					   "QET_ENABLE_SCRIPTING ; ce réglage est sans effet "
+					   "tant qu'elle est définie."));
+	}
+#else
+		//Built without Qt Qml: there is no scripting to allow. Disabled as
+		//well as hidden, so applyConf() leaves the stored value alone --
+		//a hidden box still reports its state, and writing it here would
+		//quietly clear a preference set on a build that does have Qml.
+	ui->m_enable_scripting->setVisible(false);
+	ui->m_enable_scripting->setEnabled(false);
+#endif
 	ui->m_use_folio_label->setChecked(settings.value("genericpanel/folio", true).toBool());
 	ui->m_border_0->setChecked(settings.value("border-columns_0", false).toBool());
 	ui->m_autosave_sb->setValue(settings.value("diagrameditor/autosave-interval", 0).toInt());
@@ -206,7 +232,17 @@ void GeneralConfigurationPage::applyConf()
 	bool must_use_system_colors  = ui->m_use_system_color_cb->isChecked();
 	settings.setValue("usesystemcolors", must_use_system_colors);
 	if (was_using_system_colors != must_use_system_colors) {
-		QETApp::instance()->useSystemPalette(must_use_system_colors);
+		if (must_use_system_colors) {
+			QETApp::instance()->useSystemPalette(true);
+		} else {
+			QColor custom_color = ui->m_custom_app_color_kpb->color();
+			settings.setValue("customapplicationcolor", custom_color.name());
+			QETApp::instance()->useCustomPalette(custom_color);
+		}
+	} else if (!must_use_system_colors) {
+		QColor custom_color = ui->m_custom_app_color_kpb->color();
+		settings.setValue("customapplicationcolor", custom_color.name());
+		QETApp::instance()->useCustomPalette(custom_color);
 	}
 	settings.setValue("border-columns_0",ui->m_border_0->isChecked());
 	settings.setValue("lang", ui->m_lang_cb->itemData(ui->m_lang_cb->currentIndex()).toString());
@@ -227,6 +263,14 @@ void GeneralConfigurationPage::applyConf()
 		//DIAGRAM COMMAND
 	settings.setValue("diagramcommands/erase-label-on-copy", ui->m_save_label_paste->isChecked());
 
+		//SCRIPTING
+		//Left alone while the environment forces it on: the box is disabled
+		//in that case and writing its state would silently clear the user's
+		//real preference the first time this dialog is accepted.
+	if (ui->m_enable_scripting->isEnabled()) {
+		QetSettings::setScriptingEnabled(ui->m_enable_scripting->isChecked());
+	}
+
 		//GENERIC PANEL
 	settings.setValue("genericpanel/folio",ui->m_use_folio_label->isChecked());
 
@@ -625,3 +669,14 @@ void GeneralConfigurationPage::on_m_hdpi_round_cb_clicked(bool checked)
 	ui->m_hdpi_round_policy_cb->setEnabled(checked);
 }
 
+/**
+	@brief GeneralConfigurationPage::on_m_use_system_color_cb_toggled
+	Enable/disable the custom color picker when the system color
+	checkbox is toggled.
+	@param checked
+*/
+void GeneralConfigurationPage::on_m_use_system_color_cb_toggled(bool checked)
+{
+	ui->m_custom_app_color_kpb->setEnabled(!checked);
+}
+

sources/ui/configpage/generalconfigurationpage.h

@@ -53,6 +53,7 @@ class GeneralConfigurationPage : public ConfigPage
 		void on_ElementEditor_Grid_PointSize_min_sb_valueChanged(int value);
 
 		void on_m_hdpi_round_cb_clicked(bool checked);
+		void on_m_use_system_color_cb_toggled(bool checked);
 
 	private:
 		void fillLang();

sources/ui/configpage/generalconfigurationpage.ui

@@ -23,15 +23,26 @@
       <attribute name="title">
        <string>Apparence</string>
       </attribute>
-      <layout class="QVBoxLayout" name="verticalLayout">
-       <item>
-        <widget class="QCheckBox" name="m_use_system_color_cb">
-         <property name="text">
-          <string>Utiliser les couleurs du système</string>
-         </property>
-        </widget>
-       </item>
-       <item>
+       <layout class="QVBoxLayout" name="verticalLayout">
+        <item>
+         <layout class="QHBoxLayout" name="m_system_color_layout">
+          <item>
+           <widget class="QCheckBox" name="m_use_system_color_cb">
+            <property name="text">
+             <string>Utiliser les couleurs du système</string>
+            </property>
+           </widget>
+          </item>
+          <item>
+           <widget class="KColorButton" name="m_custom_app_color_kpb">
+            <property name="toolTip">
+             <string>Couleur de l'application</string>
+            </property>
+           </widget>
+          </item>
+         </layout>
+        </item>
+        <item>
         <widget class="Line" name="line">
          <property name="orientation">
           <enum>Qt::Horizontal</enum>
@@ -207,6 +218,16 @@
         </widget>
        </item>
        <item row="4" column="0">
+        <widget class="QCheckBox" name="m_enable_scripting">
+         <property name="text">
+          <string>Autoriser l'exécution de scripts JavaScript (Projet &gt; Exécuter un script, et --run)</string>
+         </property>
+         <property name="toolTip">
+          <string>Un script s'exécute avec vos droits : il peut lire et modifier le projet ouvert et écrire des fichiers. Désactivé par défaut ; n'exécutez que des scripts dont vous connaissez l'origine.</string>
+         </property>
+        </widget>
+       </item>
+       <item row="5" column="0">
         <spacer name="verticalSpacer_2">
          <property name="orientation">
           <enum>Qt::Vertical</enum>
@@ -1161,4 +1182,11 @@ Vous pouvez spécifier ici la valeur par défaut de ce champ pour les éléments
  </tabstops>
  <resources/>
  <connections/>
+ <customwidgets>
+  <customwidget>
+   <class>KColorButton</class>
+   <extends>QPushButton</extends>
+   <header>nokde/kcolorbutton.h</header>
+  </customwidget>
+ </customwidgets>
 </ui>

sources/ui/diagrambgcolorbutton.cpp

@@ -23,6 +23,7 @@
 #include "../qetdiagrameditor.h"
 #include "../projectview.h"
 #include "../qetproject.h"
+#include "../utils/qetsettings.h"
 
 #include <QApplication>
 #include <QColorDialog>
@@ -62,8 +63,28 @@ DiagramBgColorToolButton::DiagramBgColorToolButton(QETDiagramEditor *editor, QWi
 	setStatusTip(tr("Choisir la couleur de fond du folio",
 		"status bar tip"));
 
-	m_is_system_color = true;
-	m_current = QApplication::palette().color(QPalette::Base);
+		//main() already restored the stored choice onto the global
+		//Diagram::background_color and PaletteGraphicsView flag; mirror it
+		//here so the button opens on what the editor actually draws, rather
+		//than always claiming "system colour" as it used to.
+	if (PaletteGraphicsView::customBackgroundColor()) {
+		m_is_system_color = false;
+		m_current = Diagram::background_color;
+	} else {
+		m_is_system_color = true;
+		m_current = QApplication::palette().color(QPalette::Base);
+	}
+	for (const QString &name : QetSettings::sheetBackgroundRecentColors())
+	{
+		const QColor c(name);
+		if (c.isValid()) {
+			m_recent.append(c);
+		}
+	}
+	while (m_recent.size() > MAX_RECENT) {
+		m_recent.removeLast();
+	}
+
 	setMenu(new QMenu(this));
 	rebuildMenu();
 	setSwatch(m_current);
@@ -123,6 +144,7 @@ void DiagramBgColorToolButton::applyColor(const QColor &color)
 
 	PaletteGraphicsView::setCustomBackgroundColor(true);
 	Diagram::background_color = color;
+	QetSettings::setSheetBackground(QetSettings::SheetBackground{color, true});
 
 	QETDiagramEditor *editor = m_editor;
 	if (!editor) {
@@ -146,6 +168,8 @@ void DiagramBgColorToolButton::applySystemColor()
 
 	PaletteGraphicsView::setCustomBackgroundColor(false);
 	Diagram::background_color = Qt::white;
+	QetSettings::setSheetBackground(
+				QetSettings::SheetBackground{QColor(Qt::white), false});
 
 	QETDiagramEditor *editor = m_editor;
 	if (!editor) {
@@ -187,6 +211,21 @@ void DiagramBgColorToolButton::rememberRecent(const QColor &color)
 		m_recent.removeLast();
 	}
 	rebuildMenu();
+	persistRecent();
+}
+
+/**
+	@brief DiagramBgColorToolButton::persistRecent
+	Write the "recently used" colours back to the settings, so they are
+	still there on the next start instead of starting out empty.
+*/
+void DiagramBgColorToolButton::persistRecent()
+{
+	QStringList names;
+	for (const QColor &c : std::as_const(m_recent)) {
+		names << c.name();
+	}
+	QetSettings::setSheetBackgroundRecentColors(names);
 }
 
 /**

sources/ui/diagrambgcolorbutton.h

@@ -52,6 +52,7 @@ class DiagramBgColorToolButton : public QToolButton
 		void applySystemColor();
 		void chooseOtherColor();
 		void rememberRecent(const QColor &color);
+		void persistRecent();
 		void setSwatch(const QColor &color);
 		static QIcon swatchIcon(const QColor &color);
 

sources/ui/duplicateoffsetdialog.cpp

@@ -0,0 +1,114 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#include "duplicateoffsetdialog.h"
+
+#include <QComboBox>
+#include <QDialogButtonBox>
+#include <QFormLayout>
+#include <QSettings>
+#include <QSpinBox>
+#include <QVBoxLayout>
+
+namespace {
+	// Stored as one integer per axis, in grid steps -- not pixels, so the
+	// remembered offset still makes sense if the grid size ever changes.
+	const QString kOffsetXKey = QStringLiteral("diagrameditor/duplicate_offset_x");
+	const QString kOffsetYKey = QStringLiteral("diagrameditor/duplicate_offset_y");
+}
+
+DuplicateOffsetDialog::DuplicateOffsetDialog(QWidget *parent) :
+	QDialog(parent)
+{
+	setWindowTitle(tr("Dupliquer"));
+
+	auto *form = new QFormLayout;
+
+	m_spacing = new QSpinBox(this);
+	m_spacing->setRange(1, 1000);
+	m_spacing->setSuffix(tr(" pas de grille"));
+	form->addRow(tr("Espacement :"), m_spacing);
+
+	m_direction = new QComboBox(this);
+	// Order matches the Direction enum, so currentIndex() can be used
+	// directly wherever Direction is needed.
+	m_direction->addItem(tr("Haut"));
+	m_direction->addItem(tr("Bas"));
+	m_direction->addItem(tr("Gauche"));
+	m_direction->addItem(tr("Droite"));
+	form->addRow(tr("Direction :"), m_direction);
+
+	const QPoint saved = savedStepOffset();
+	// The saved value is a signed (dx, dy) pair, not itself a
+	// spacing+direction pair, so it has to be decomposed back into the
+	// two the dialog shows. Exactly one axis is ever non-zero (see
+	// stepOffset()), so whichever one is picks the direction; a value
+	// that somehow has neither (only possible if QSettings was hand-
+	// edited) falls back to the same default stepOffset() would.
+	int spacing = 1;
+	Direction direction = Right;
+	if (saved.x() > 0)      { direction = Right; spacing = saved.x(); }
+	else if (saved.x() < 0) { direction = Left;  spacing = -saved.x(); }
+	else if (saved.y() > 0) { direction = Down;  spacing = saved.y(); }
+	else if (saved.y() < 0) { direction = Up;    spacing = -saved.y(); }
+	m_spacing->setValue(spacing);
+	m_direction->setCurrentIndex(static_cast<int>(direction));
+
+	auto *buttons = new QDialogButtonBox(
+				QDialogButtonBox::Ok | QDialogButtonBox::Cancel, this);
+	connect(buttons, &QDialogButtonBox::accepted, this, &QDialog::accept);
+	connect(buttons, &QDialogButtonBox::rejected, this, &QDialog::reject);
+
+	auto *layout = new QVBoxLayout(this);
+	layout->addLayout(form);
+	layout->addWidget(buttons);
+}
+
+QPoint DuplicateOffsetDialog::stepOffset() const
+{
+	const int spacing = m_spacing->value();
+	switch (static_cast<Direction>(m_direction->currentIndex())) {
+		case Up:    return QPoint(0, -spacing);
+		case Down:  return QPoint(0,  spacing);
+		case Left:  return QPoint(-spacing, 0);
+		case Right: return QPoint(spacing,  0);
+	}
+	return QPoint(spacing, 0); // unreachable; keeps -Wreturn-type quiet
+}
+
+QPoint DuplicateOffsetDialog::savedStepOffset()
+{
+	QSettings settings;
+	if (!hasSavedStepOffset()) {
+		return QPoint(1, 0); // default: one grid step to the right
+	}
+	return QPoint(settings.value(kOffsetXKey).toInt(),
+				 settings.value(kOffsetYKey).toInt());
+}
+
+void DuplicateOffsetDialog::saveStepOffset(const QPoint &steps)
+{
+	QSettings settings;
+	settings.setValue(kOffsetXKey, steps.x());
+	settings.setValue(kOffsetYKey, steps.y());
+}
+
+bool DuplicateOffsetDialog::hasSavedStepOffset()
+{
+	QSettings settings;
+	return settings.contains(kOffsetXKey) && settings.contains(kOffsetYKey);
+}

sources/ui/duplicateoffsetdialog.h

@@ -0,0 +1,65 @@
+/*
+	Copyright 2006-2026 The QElectroTech Team
+	This file is part of QElectroTech.
+
+	QElectroTech is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 2 of the License, or
+	(at your option) any later version.
+
+	QElectroTech is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
+*/
+#ifndef DUPLICATEOFFSETDIALOG_H
+#define DUPLICATEOFFSETDIALOG_H
+
+#include <QDialog>
+#include <QPoint>
+
+class QSpinBox;
+class QComboBox;
+
+/**
+	@brief The DuplicateOffsetDialog class
+	Asks how far, and in which of the four cardinal directions, Ctrl+D
+	(DiagramView::duplicate(), bugtracker #991) should offset a copy from
+	its source. Shown once, then remembered: the answer is stored in
+	QSettings and reused by every later Ctrl+D press without asking
+	again, until this dialog is reopened deliberately.
+*/
+class DuplicateOffsetDialog : public QDialog
+{
+		Q_OBJECT
+
+	public:
+		enum Direction { Up, Down, Left, Right };
+
+		explicit DuplicateOffsetDialog(QWidget *parent = nullptr);
+
+			/// The offset in grid steps, positive along X to the right
+			/// and positive along Y downward -- QET's own scene axes,
+			/// matching the sign convention setPos() already uses
+			/// everywhere else in this codebase.
+		QPoint stepOffset() const;
+
+			/// Reads the last-confirmed spacing/direction from QSettings,
+			/// or the default (1 step, right) if none was ever set.
+		static QPoint savedStepOffset();
+			/// Writes @p steps to QSettings, in the same X/Y convention
+			/// as stepOffset().
+		static void saveStepOffset(const QPoint &steps);
+			/// Whether a direction/spacing has already been confirmed
+			/// once, i.e. whether Ctrl+D can skip the dialog.
+		static bool hasSavedStepOffset();
+
+	private:
+		QSpinBox  *m_spacing = nullptr;
+		QComboBox *m_direction = nullptr;
+};
+
+#endif // DUPLICATEOFFSETDIALOG_H

sources/ui/elementinfowidget.cpp

@@ -16,6 +16,7 @@
 	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
 */
 #include "elementinfowidget.h"
+#include "../qet.h"
 #include <QCheckBox>
 #include <QPushButton>
 #include "../diagram.h"
@@ -366,18 +367,18 @@ void ElementInfoWidget::updateUi()
 	// Load the lock status for auto numbering
 	if (m_element->elementData().m_type == ElementData::Terminal) {
 		QString lock_value = element_info.value(QStringLiteral("auto_num_locked")).toString();
-		ui->m_auto_num_locked_cb->setChecked(lock_value == QLatin1String("true"));
+		ui->m_auto_num_locked_cb->setChecked(QET::infoFlagIsTrue(lock_value));
 
 		// English: Load the potential isolating status from the element information mapping
 		if (m_potential_isolating_cb) {
 			QString isolating_value = element_info.value(QStringLiteral("potential_isolating")).toString();
-			m_potential_isolating_cb->setChecked(isolating_value == QLatin1String("true"));
+			m_potential_isolating_cb->setChecked(QET::infoFlagIsTrue(isolating_value));
 		}
 	}
 	// English: Load the BOM exclusion status from the element information mapping
 	if (m_exclude_from_bom_cb) {
 		QString exclude_bom_value = element_info.value(QStringLiteral("exclude_from_bom")).toString();
-		m_exclude_from_bom_cb->setChecked(exclude_bom_value == QLatin1String("true"));
+		m_exclude_from_bom_cb->setChecked(QET::infoFlagIsTrue(exclude_bom_value));
 	}
 
 	if (m_live_edit) {

sources/ui/masterpropertieswidget.cpp

@@ -539,7 +539,35 @@ void MasterPropertiesWidget::updateUi()
 				tr("Type"), tr("Adresse"), tr("Fonction"),
 				tr("Commentaire"), tr("Réf. croisée"), tr("Bornes")
 			});
-			m_plc_table->horizontalHeader()->setSectionResizeMode(QHeaderView::Stretch);
+			m_plc_table->horizontalHeader()->setSectionResizeMode(QHeaderView::Interactive);
+			m_plc_table->horizontalHeader()->setSectionsMovable(true);
+			m_plc_table->horizontalHeader()->resizeSection(0, 120);
+			m_plc_table->horizontalHeader()->resizeSection(1, 100);
+			m_plc_table->horizontalHeader()->resizeSection(2, 150);
+			m_plc_table->horizontalHeader()->resizeSection(3, 150);
+			m_plc_table->horizontalHeader()->resizeSection(4, 100);
+			m_plc_table->horizontalHeader()->resizeSection(5, 120);
+
+			// Restore a previously saved column layout, if any
+			auto *plc_hdr = m_plc_table->horizontalHeader();
+			QSettings plc_settings;
+			const QVariant plc_hdr_state = plc_settings.value(
+				QStringLiteral("masterpropertieswidget/plc-table-header-state"));
+			if (!plc_hdr_state.isNull())
+				plc_hdr->restoreState(plc_hdr_state.toByteArray());
+
+			// Persist the column layout whenever the user resizes or moves a column
+			auto save_plc_header_state = [plc_hdr]()
+			{
+				QSettings settings;
+				settings.setValue(QStringLiteral("masterpropertieswidget/plc-table-header-state"),
+						  plc_hdr->saveState());
+			};
+			connect(plc_hdr, &QHeaderView::sectionResized,
+				this, save_plc_header_state);
+			connect(plc_hdr, &QHeaderView::sectionMoved,
+				this, save_plc_header_state);
+
 			m_plc_table->setSelectionBehavior(QAbstractItemView::SelectItems);
 			m_plc_table->setSelectionMode(QAbstractItemView::ExtendedSelection);
 			m_plc_table->setMinimumHeight(200);

sources/ui/terminalnumberingdialog.cpp

@@ -1,5 +1,6 @@
 #include "terminalnumberingdialog.h"
 #include "ui_terminalnumberingdialog.h"
+#include "../qet.h"
 #include "../qetproject.h"
 #include "../diagram.h"
 #include "../qetgraphicsitem/element.h"
@@ -34,7 +35,7 @@ TerminalNumberingDialog::TerminalNumberingDialog(QWidget *parent, QETProject *pr
                     if (elmt->elementData().m_type == ElementData::Terminal) {
                         // Ignore locked terminals
                         DiagramContext info = elmt->elementInformations();
-                        if (info.value(QStringLiteral("auto_num_locked")).toString() == QLatin1String("true")) {
+                        if (QET::infoFlagIsTrue(info.value(QStringLiteral("auto_num_locked")).toString())) {
                             continue;
                         }
 
@@ -158,7 +159,7 @@ QUndoCommand* TerminalNumberingDialog::getUndoCommand(QETProject *project) const
                     DiagramContext info = elmt->elementInformations();
 
                     // Ignore locked terminals (if the user checked a 'lock' property)
-                    if (info.value(QStringLiteral("auto_num_locked")).toString() == QLatin1String("true")) {
+                    if (QET::infoFlagIsTrue(info.value(QStringLiteral("auto_num_locked")).toString())) {
                         continue;
                     }
 

sources/undocommand/linkelementcommand.cpp

@@ -314,31 +314,15 @@ void LinkElementCommand::redo()
 	if(m_element->diagram()) m_element->diagram()->showMe();
 	makeLink(m_linked_after);
 
-		//If the action is to link two reports together, we check if the conductors
-		//of the new potential have the same text, function, and protocol.
-		//if not, a dialog ask what do to.
+		//If the action is to link two reports together, and the conductors
+		//of the new potential disagree on a property that matters, a
+		//dialog asks what to do. See reportLinkNeedsPotentialChoice() for
+		//what "disagree" checks and the bug fixed there (bugtracker #974).
 	if (m_first_redo && (m_element->linkType() & Element::AllReport) \
 		&& m_element->conductors().size() \
 		&& m_linked_after.size() && m_linked_after.first()->conductors().size())
 	{
-			//fill list of potential
-		QSet <Conductor *> c_list = m_element->conductors().first()->relatedPotentialConductors();
-		c_list << m_element->conductors().first();
-			//fill list of text
-		QStringList str_txt;
-		QStringList str_funct;
-		QStringList str_tens;
-		for (const Conductor *c : c_list)
-		{
-			str_txt   << c->properties().text;
-			str_funct << c->properties().m_function;
-			str_tens  << c->properties().m_tension_protocol;
-			str_tens  << c->properties().m_wire_color;
-			str_tens  << c->properties().m_wire_section;
-		}
-
-			//check text list, isn't same in potential, ask user what to do
-		if (!QET::eachStrIsEqual(str_txt) || !QET::eachStrIsEqual(str_funct) || !QET::eachStrIsEqual(str_tens))
+		if (reportLinkNeedsPotentialChoice(m_element, m_linked_after.first()))
 		{
 			PotentialSelectorDialog psd(m_element, this);
 			psd.exec();
@@ -348,6 +332,64 @@ void LinkElementCommand::redo()
 	QUndoCommand::redo();
 }
 
+/**
+	@brief LinkElementCommand::reportLinkNeedsPotentialChoice
+	Whether linking these two report elements (next_report/previous_report)
+	would pop PotentialSelectorDialog -- i.e. whether their conductors (if
+	any exist yet, on either side) disagree on a property redo() cares
+	about. Exposed as its own static method, rather than left inline in
+	redo(), for the same reason ConductorCreator::needsPotentialChoice()
+	is: a caller with nobody there to answer a modal dialog (the scripting
+	API) can check first and decline, and the condition cannot drift away
+	from the one redo() actually applies.
+
+	Bug fixed here (bugtracker #974): the original check built ONE
+	combined list from three unrelated fields (tension_protocol,
+	wire_color, wire_section) and tested that whole list for equality --
+	comparing a tension-protocol string against a wire-colour string is
+	never equal even when each field individually matches across every
+	conductor, and wire_color/wire_section are ConductorProperties::
+	m_wire_color/m_wire_section, a separate free-text documentation pair
+	that says nothing about how the wire is actually drawn (that is
+	"color"/"style"). Net effect: the dialog could not reliably detect a
+	real mismatch, including the exact case #974 reported -- two
+	report-linked conductors drawn in different colours -- and could just
+	as easily fire on conductors that matched in every way that mattered.
+	Comparing each relevant field (text/num, function, tension protocol,
+	colour, line style) on its own fixes both.
+
+	@param element_a @param element_b the two elements about to be (or
+	already) linked; order does not matter
+	@return true if the dialog would (or does) open
+*/
+bool LinkElementCommand::reportLinkNeedsPotentialChoice(Element *element_a, Element *element_b)
+{
+	if (!element_a || !element_b) return false;
+	if (element_a->conductors().isEmpty() || element_b->conductors().isEmpty()) return false;
+
+	QSet<Conductor *> c_list;
+	for (Element *e : {element_a, element_b})
+	{
+		if (e->conductors().isEmpty()) continue;
+		c_list << e->conductors().first();
+		c_list += e->conductors().first()->relatedPotentialConductors();
+	}
+	if (c_list.size() < 2) return false;
+
+	QStringList str_txt, str_funct, str_tens, str_color, str_style;
+	for (const Conductor *c : std::as_const(c_list))
+	{
+		str_txt   << c->properties().text;
+		str_funct << c->properties().m_function;
+		str_tens  << c->properties().m_tension_protocol;
+		str_color << c->properties().color.name();
+		str_style << QString::number(int(c->properties().style));
+	}
+	return !QET::eachStrIsEqual(str_txt) || !QET::eachStrIsEqual(str_funct)
+		|| !QET::eachStrIsEqual(str_tens) || !QET::eachStrIsEqual(str_color)
+		|| !QET::eachStrIsEqual(str_style);
+}
+
 /**
 	@brief LinkElementCommand::setUpNewLink
 	Update the content of m_link_after with the content of element_list.

sources/undocommand/linkelementcommand.h

@@ -38,6 +38,7 @@ class LinkElementCommand : public QUndoCommand
 		bool mergeWith(const QUndoCommand *other) override;
 
 		static bool isLinkable (Element *element_a, Element *element_b, bool already_linked = false);
+		static bool reportLinkNeedsPotentialChoice(Element *element_a, Element *element_b);
 
 		void setLink (const QList<Element *>& element_list);
 		void setLink (Element *element_);

sources/undocommand/rotatetextscommand.cpp

@@ -25,15 +25,34 @@
 #include "../qetgraphicsitem/elementtextitemgroup.h"
 #include "../qtextorientationspinboxwidget.h"
 
+/**
+	@brief RotateTextsCommand::hasSelectedTexts
+	@param diagram
+	@return true if @p diagram has at least one selected text or text group.
+	Lets a caller decide whether to ask the user for an angle at all, keeping
+	the previous behaviour where no dialog appeared for an empty selection.
+*/
+bool RotateTextsCommand::hasSelectedTexts(Diagram *diagram)
+{
+	if(!diagram)
+		return false;
+
+	DiagramContent dc(diagram);
+	return (!dc.selectedTexts().isEmpty() || !dc.selectedTextsGroup().isEmpty());
+}
+
 /**
 	@brief RotateTextsCommand::RotateTextsCommand
 	@param diagram : Apply the rotation to the selected texts and group of texts
-	of diagram at construction time. 
+	of diagram at construction time.
+	@param rotation : the angle to apply, in degrees. Obtain it from
+	askRotation() for interactive use; pass it directly from a test or script.
 	@param parent : undo parent
 */
-RotateTextsCommand::RotateTextsCommand(Diagram *diagram, QUndoCommand *parent) :
+RotateTextsCommand::RotateTextsCommand(Diagram *diagram, qreal rotation, QUndoCommand *parent) :
 QUndoCommand(parent),
-m_diagram(diagram)
+m_diagram(diagram),
+m_rotation(rotation)
 {
 	DiagramContent dc(m_diagram);
 	QList <DiagramTextItem *> texts_list;
@@ -53,8 +72,6 @@ m_diagram(diagram)
 	
 	if(texts_list.count() || groups_list.count())
 	{
-		openDialog();
-		
 		QStringList parts;
 		if (texts_list.count())
 			parts << QObject::tr("%n texte(s)", "", texts_list.count());
@@ -76,9 +93,15 @@ void RotateTextsCommand::undo()
 	if(m_diagram)
 		m_diagram.data()->showMe();
 	
+		//Nothing was selected at construction time: there is no animation to
+		//run. QUndoStack::push() calls redo() before it discards an obsolete
+		//command, so this has to be survivable rather than assumed away.
+	if(!m_anim_group)
+		return;
+
 	m_anim_group->setDirection(QAnimationGroup::Backward);
 	m_anim_group->start();
-	
+
 	for(ConductorTextItem *cti : m_cond_texts.keys())
 		cti->forceRotateByUser(m_cond_texts.value(cti));
 }
@@ -88,14 +111,28 @@ void RotateTextsCommand::redo()
 	if(m_diagram)
 		m_diagram.data()->showMe();
 	
+	if(!m_anim_group)
+		return;
+
 	m_anim_group->setDirection(QAnimationGroup::Forward);
 	m_anim_group->start();
-	
+
 	for(ConductorTextItem *cti : m_cond_texts.keys())
 		cti->forceRotateByUser(true);
 }
 
-void RotateTextsCommand::openDialog()
+/**
+	@brief RotateTextsCommand::askRotation
+	Ask the user for an orientation.
+	@param rotation : set to the chosen angle when the dialog is accepted,
+	left untouched otherwise.
+	@return true if the user accepted, false if they cancelled.
+
+	Deliberately static and separate from the command: a QUndoCommand that
+	blocks on a modal in its constructor cannot be built by a test, a script,
+	or any headless caller.
+*/
+bool RotateTextsCommand::askRotation(qreal &rotation)
 {
 		//Open the dialog
 	QDialog ori_text_dialog;
@@ -120,10 +157,11 @@ void RotateTextsCommand::openDialog()
 	layout_v.addStretch();
 	layout_v.addWidget(&buttons);
 	
-	if (ori_text_dialog.exec() == QDialog::Accepted)
-		m_rotation = ori_widget->orientation();
-	else
-		setObsolete(true);
+	if (ori_text_dialog.exec() != QDialog::Accepted)
+		return false;
+
+	rotation = ori_widget->orientation();
+	return true;
 }
 
 void RotateTextsCommand::setupAnimation(QObject *target, const QByteArray &propertyName, const QVariant& start, const QVariant& end)

sources/undocommand/rotatetextscommand.h

@@ -28,19 +28,38 @@ class QParallelAnimationGroup;
 
 /**
 	@brief The RotateTextsCommand class
-	Open a dialog for edit the rotation of the current selected texts and texts group in diagram.
-	Just instantiate this undo command and push it in a QUndoStack.
+	Apply @p rotation to the currently selected texts and texts group of a
+	diagram. Just instantiate this undo command and push it in a QUndoStack.
+
+	This command does not ask the user for anything: obtaining the angle is the
+	caller's job, via the askRotation() helper below. Keeping the dialog out of
+	the constructor is what makes the command usable outside an interactive
+	session — from a test harness, a regression sweep, or a script — and stops
+	a headless caller from blocking forever on a modal nobody can answer.
+
+	Typical interactive use:
+	@code
+	if (RotateTextsCommand::hasSelectedTexts(diagram)) {
+		qreal rotation = 0;
+		if (RotateTextsCommand::askRotation(rotation))
+			diagram->undoStack().push(new RotateTextsCommand(diagram, rotation));
+	}
+	@endcode
 */
 class RotateTextsCommand : public QUndoCommand
 {
 	public:
-		RotateTextsCommand(Diagram *diagram, QUndoCommand *parent=nullptr);
+		RotateTextsCommand(Diagram *diagram, qreal rotation, QUndoCommand *parent=nullptr);
+
+			/// @return true if @p diagram has at least one selected text or text group to rotate.
+		static bool hasSelectedTexts(Diagram *diagram);
+			/// Open the orientation dialog. @return true and set @p rotation if accepted, false if cancelled.
+		static bool askRotation(qreal &rotation);
 
 		void undo() override;
 		void redo() override;
 
 	private:
-		void openDialog();
 		void setupAnimation(QObject *target, const QByteArray &propertyName, const QVariant& start, const QVariant& end);
 
 	private:

sources/utils/conductorcreator.cpp

@@ -18,7 +18,9 @@
 #include "conductorcreator.h"
 
 #include "../conductorautonumerotation.h"
+#include "../dataBase/projectdatabase.h"
 #include "../diagram.h"
+#include "../qetproject.h"
 #include "../undocommand/addgraphicsobjectcommand.h"
 #include "../qetgraphicsitem/conductor.h"
 #include "../qetgraphicsitem/element.h"
@@ -68,6 +70,15 @@ ConductorCreator::ConductorCreator(Diagram *d, QList<Terminal *> terminals_list)
 	
 	for(Conductor *c : c_list) {
 		c->refreshText();
+			//refreshText() resolves an auto-numbering formula into
+			//properties.text without emitting propertiesChange, which is
+			//what the project database listens to. The row was inserted
+			//while text was still the raw formula ("W%sequ_1"), so without
+			//this the wiring list and BOM read the formula, not "W1",
+			//until something forces a full rebuild.
+		if (d->project() && d->project()->dataBase()) {
+			d->project()->dataBase()->updateConductor(c);
+		}
 	}
 }
 

sources/utils/qetsettings.cpp

@@ -19,6 +19,7 @@
 #include "qetsettings.h"
 #include <QSettings>
 #include <QVariant>
+#include <QByteArray>
 
 namespace QetSettings
 {
@@ -105,4 +106,113 @@ namespace QetSettings
 			return default_policy;
 		}
 	}
+
+	/**
+	* @brief scriptingForcedByEnvironment
+	* @return true if QET_ENABLE_SCRIPTING is set to 1 in the environment.
+	*
+	* The way to turn scripting on where there is nobody to tick a box:
+	* a headless run, a CI job, a build server. Those have no settings
+	* file worth writing to -- and on a machine whose HOME is created
+	* fresh for the run, writing one would not survive anyway.
+	*/
+	bool scriptingForcedByEnvironment()
+	{
+		return qgetenv("QET_ENABLE_SCRIPTING") == QByteArray("1");
+	}
+
+	/**
+	* @brief scriptingEnabled
+	* @return whether QElectroTech may run a JavaScript script.
+	*
+	* Off unless the user turned it on. A script reaches the whole project
+	* and the filesystem through the export calls, so it is capability the
+	* great majority of users never asked for; leaving it on by default
+	* would hand it to them anyway. @sa setScriptingEnabled
+	*
+	* The environment override wins over the stored value, and is checked
+	* first so that a machine with no settings at all still answers.
+	*/
+	bool scriptingEnabled()
+	{
+		if (scriptingForcedByEnvironment()) {
+			return true;
+		}
+		QSettings settings;
+		return settings.value("scripting/enabled", false).toBool();
+	}
+
+	/**
+	* @brief setScriptingEnabled
+	* Store whether scripting is allowed. @sa scriptingEnabled
+	* @param enabled
+	*/
+	void setScriptingEnabled(bool enabled)
+	{
+		QSettings settings;
+		settings.setValue("scripting/enabled", enabled);
+	}
+
+	/**
+	* @brief setSheetBackground
+	* Store the sheet background last picked in the diagram editor, so the
+	* next start opens on it for every project, old or new. @sa sheetBackground
+	* @param background
+	*/
+	void setSheetBackground(const SheetBackground &background)
+	{
+		QSettings settings;
+		//HexRgb, not HexArgb, on purpose: Diagram::background_color is
+		//temporarily given an alpha of 0 by the SVG export to make the
+		//background transparent, and that transient value must never end
+		//up here as a stored transparent sheet.
+		settings.setValue(QStringLiteral("diagrameditor/sheet_background_color"),
+				  background.color.name(QColor::HexRgb));
+		settings.setValue(QStringLiteral("diagrameditor/sheet_background_custom"),
+				  background.custom);
+	}
+
+	/**
+	* @brief sheetBackground
+	* @return the sheet background stored by setSheetBackground(), or the
+	* built-in default (white, following the system) when there is none.
+	* @sa setSheetBackground
+	*/
+	SheetBackground sheetBackground()
+	{
+		QSettings settings;
+		SheetBackground background;
+		background.custom = settings.value(
+				QStringLiteral("diagrameditor/sheet_background_custom"),
+				false).toBool();
+		const QColor stored(settings.value(
+				QStringLiteral("diagrameditor/sheet_background_color"),
+				QStringLiteral("#ffffff")).toString());
+		background.color = stored.isValid() ? stored : QColor(Qt::white);
+		return background;
+	}
+
+	/**
+	* @brief sheetBackgroundRecentColors
+	* @return the "recently used" sheet background colours, most recent
+	* first. Empty until the user has picked a non-preset colour.
+	* @sa setSheetBackgroundRecentColors
+	*/
+	QStringList sheetBackgroundRecentColors()
+	{
+		QSettings settings;
+		return settings.value(QStringLiteral("diagrameditor/sheet_background_recent")).toStringList();
+	}
+
+	/**
+	* @brief setSheetBackgroundRecentColors
+	* Store the "recently used" sheet background colours, most recent first.
+	* @sa sheetBackgroundRecentColors
+	* @param colors
+	*/
+	void setSheetBackgroundRecentColors(const QStringList &colors)
+	{
+		QSettings settings;
+		settings.setValue(QStringLiteral("diagrameditor/sheet_background_recent"), colors);
+	}
 }

sources/utils/qetsettings.h

@@ -19,6 +19,8 @@
 #define QETSETTINGS_H
 
 #include <Qt>
+#include <QColor>
+#include <QStringList>
 
 /**
  *Interface to use QSettings in QElectroTech
@@ -32,6 +34,32 @@ namespace QetSettings
 	void setHdpiScaleFactorRoundingPolicy(Qt::HighDpiScaleFactorRoundingPolicy policy);
 	Qt::HighDpiScaleFactorRoundingPolicy hdpiScaleFactorRoundingPolicy(
 			Qt::HighDpiScaleFactorRoundingPolicy default_policy = Qt::HighDpiScaleFactorRoundingPolicy::PassThrough);
+
+	bool scriptingEnabled();
+	void setScriptingEnabled(bool enabled);
+	bool scriptingForcedByEnvironment();
+
+	/**
+		@brief The sheet (folio) background the diagram editors draw.
+
+		Both halves are needed, not just the colour: with custom == false
+		the sheet follows the system ("Couleur systeme") and the views are
+		free to invert the lightness on a dark palette, while the very same
+		#ffffff with custom == true is an explicit "always white" that
+		must not be inverted. Storing only the colour would collapse the
+		two on the next start.
+	*/
+	struct SheetBackground
+	{
+		QColor color;
+		bool custom = false;
+	};
+
+	SheetBackground sheetBackground();
+	void setSheetBackground(const SheetBackground &background);
+
+	QStringList sheetBackgroundRecentColors();
+	void setSheetBackgroundRecentColors(const QStringList &colors);
 }
 
 #endif // QETSETTINGS_H