Merge branch 'QT6' into master

initial release to Qt6 TODO: -remove KCoreAddons -remove KWidgetsAddons * QT6: (24 commits) QT6: No Qt::AA_EnableHighDpiScaling in QT6 QT6: TeDo mod QList for DeleteQGraphicsItemCommand QT6: Todo Fix QtConcurrent (remove KCoreAddons?) QT6: Todo QVariant::setValue QT6: std::min needs further tweaking QPrinting class needs further tweaking QT6: QStyleOptionGraphicsItem Add QActionGroup QT6: QStyleOptionGraphicsItem QT6: QLibraryInfo Totest QRegularExpression ok? QT6: QStyleOptionGraphicsItem QT6: QMouseEvent QT6: QDropEvent QT6: Fix deprecated QRegExp QT6: hooks added QT6: Mod unused function put in comments Add missing include QActionGroup QT6: set C++17 QT6: diagramitemweight set val to Font::Weight ...
2025-12-19 14:50:53 +01:00 · 2020-10-03 16:18:03 +02:00
parent 3b71cb7dfe 9f3c173b9f
commit f5d2fc3916
32 changed files with 1124 additions and 691 deletions
--- a/SingleApplication/singleapplication.pri
+++ b/SingleApplication/singleapplication.pri
@@ -1,5 +1,5 @@
 QT += core network
-CONFIG += c++11
+CONFIG += c++17

 HEADERS += $$PWD/singleapplication.h \
    $$PWD/singleapplication_p.h
--- a/SingleApplication/singleapplication_p.cpp
+++ b/SingleApplication/singleapplication_p.cpp
@@ -218,7 +218,22 @@ void SingleApplicationPrivate::connectToPrimary( int msecs, ConnectionType conne
 		writeStream << blockServerName.toLatin1();
 		writeStream << static_cast<quint8>(connectionType);
 		writeStream << instanceNumber;
-		quint16 checksum = qChecksum(initMsg.constData(), static_cast<quint32>(initMsg.length()));
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+		quint16 checksum =
+				qChecksum(
+					initMsg.constData(),
+					static_cast<quint32>(initMsg.length()));
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+		quint16 checksum =
+				qChecksum(
+					QByteArrayView(
+						initMsg.constData(),
+						static_cast<quint32>(initMsg.length())));
+#endif
 		writeStream << checksum;

 		// The header indicates the message length that follows
@@ -239,10 +254,21 @@ void SingleApplicationPrivate::connectToPrimary( int msecs, ConnectionType conne

 quint16 SingleApplicationPrivate::blockChecksum()
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	return qChecksum(
 				static_cast <const char *>( memory->data() ),
 				offsetof( InstancesInfo, checksum )
 				);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	return qChecksum(
+				QByteArrayView(
+					static_cast <const char *>( memory->data() ),
+					offsetof( InstancesInfo, checksum )));
+
+#endif
 }

 qint64 SingleApplicationPrivate::primaryPid()
@@ -366,8 +392,21 @@ void SingleApplicationPrivate::readInitMessageBody( QLocalSocket *sock )
 	quint16 msgChecksum = 0;
 	readStream >> msgChecksum;

-	const quint16 actualChecksum = qChecksum( msgBytes.constData(), static_cast<quint32>( msgBytes.length() - sizeof( quint16 ) ) );
-	
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	const quint16 actualChecksum =
+			qChecksum(
+				msgBytes.constData(),
+				static_cast<quint32>( msgBytes.length() - sizeof( quint16 ) ) );
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	const quint16 actualChecksum =
+			qChecksum(
+				QByteArrayView(
+					msgBytes.constData(),
+					static_cast<quint32>(msgBytes.length() - sizeof(quint16))));
+#endif
 	bool isValid = readStream.status() == QDataStream::Ok &&
 			QLatin1String(latin1Name) == blockServerName &&
 			msgChecksum == actualChecksum;
--- a/qelectrotech.pro
+++ b/qelectrotech.pro
@@ -220,7 +220,7 @@ UI_SOURCES_DIR = sources/ui/
 UI_HEADERS_DIR = sources/ui/

 # Configuration de la compilation
-CONFIG += c++11 debug_and_release warn_on
+CONFIG += c++17 debug_and_release warn_on

 # Nom du binaire genere par la compilation
 TARGET = qelectrotech
@@ -229,8 +229,8 @@ TARGET = qelectrotech
 unix:QMAKE_LIBS_THREAD -= -lpthread
 unix|win32: LIBS += -lsqlite3

-# Enable C++11
-QMAKE_CXXFLAGS += -std=c++11
+# Enable C++17
+QMAKE_CXXFLAGS += -std=c++17

 # Description de l'installation
 target.path        = $$join(INSTALL_PREFIX,,,$${QET_BINARY_PATH})
--- a/sources/ElementsCollection/elementslocation.cpp
+++ b/sources/ElementsCollection/elementslocation.cpp
@@ -144,11 +144,23 @@ bool ElementsLocation::operator!=(const ElementsLocation &other) const
 */
 QString ElementsLocation::baseName() const
 {
-	QRegExp regexp("^.*([^/]+)\\.elmt$");
-	if (regexp.exactMatch(m_collection_path)) {
-		return(regexp.capturedTexts().at(1));
+	QRegularExpression regexp("^.*(?<name>[^/]+)\\.elmt$");
+	if (!regexp.isValid())
+	{
+		qWarning() <<"this is an error in the code"
+			  << regexp.errorString()
+			  << regexp.patternErrorOffset();
+		return QString();
 	}
-	return(QString());
+
+	QRegularExpressionMatch match = regexp.match(m_collection_path);
+	if (!match.hasMatch())
+	{
+		qDebug()<<"no Match => return"
+			<<m_collection_path;
+		return QString();
+	}
+	return match.captured("name");
 }

 /**
@@ -368,12 +380,22 @@ bool ElementsLocation::addToPath(const QString &string)
 ElementsLocation ElementsLocation::parent() const
 {
 	ElementsLocation copy(*this);
-	QRegExp re1("^([a-z]+://)(.*)/*$");
-	if (re1.exactMatch(m_collection_path)) {
-		QString path_proto = re1.capturedTexts().at(1);
-		QString path_path = re1.capturedTexts().at(2);
-		QString parent_path = path_path.remove(QRegExp("/*[^/]+$"));
-		copy.setPath(path_proto + parent_path);
+	QRegularExpression re ("^(?<path_proto>[a-z]+://.*)/.*$");
+	if (!re.isValid())
+	{
+		qWarning()
+			<<QObject::tr("this is an error in the code")
+			<< re.errorString()
+			<< re.patternErrorOffset();
+	}
+	QRegularExpressionMatch match = re.match(m_collection_path);
+	if (!match.hasMatch())
+	{
+		qDebug()
+			<<"no Match => return"
+			<<m_collection_path;
+	}else {
+		copy.setPath(match.captured("path_proto"));
 	}
 	return(copy);
 }
@@ -734,6 +756,7 @@ bool ElementsLocation::setXml(const QDomDocument &xml_document) const
 		//Element doesn't exist, we create the element
 		else
 		{
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 			QString path_ = collectionPath(false);
 			QRegExp rx ("^(.*)/(.*\\.elmt)$");

@@ -750,7 +773,12 @@ bool ElementsLocation::setXml(const QDomDocument &xml_document) const
 				qDebug() << "ElementsLocation::setXml :"
 						" rx don't match";
 			}
-
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+		qDebug()<<"Help code for QT 6 or later";
+#endif
 		}
 	}

--- a/sources/createdxf.cpp
+++ b/sources/createdxf.cpp
@@ -1040,11 +1040,11 @@ void Createdxf::drawArcEllipse(
 /*
 * Utility functions
 */
-static QRectF scaleRect(QRectF rect)
-{
-    QRectF ro(rect.bottomLeft().x() * Createdxf::xScale,
-		Createdxf::sheetHeight - (rect.bottomLeft().y() * Createdxf::yScale),
-		rect.width() * Createdxf::xScale,
-		rect.height() * Createdxf::yScale);
-    return ro;
-}
+//static QRectF scaleRect(QRectF rect)
+//{
+//    QRectF ro(rect.bottomLeft().x() * Createdxf::xScale,
+//		Createdxf::sheetHeight - (rect.bottomLeft().y() * Createdxf::yScale),
+//		rect.width() * Createdxf::xScale,
+//		rect.height() * Createdxf::yScale);
+//    return ro;
+//}
--- a/sources/diagramview.cpp
+++ b/sources/diagramview.cpp
@@ -34,6 +34,8 @@
 #include "changetitleblockcommand.h"
 #include "conductorcreator.h"

+#include <QDropEvent>
+
 /**
 	Constructeur
 	@param diagram Schema a afficher ; si diagram vaut 0, un nouveau Diagram est utilise
@@ -200,7 +202,19 @@ void DiagramView::handleElementDrop(QDropEvent *event)
 		return;
 	}

-	diagram()->setEventInterface(new DiagramEventAddElement(location, diagram(), mapToScene(event->pos())));
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	diagram()->setEventInterface(
+				new DiagramEventAddElement(
+					location, diagram(), mapToScene(event->pos())));
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	diagram()->setEventInterface(
+				new DiagramEventAddElement(
+					location, diagram(), event->position()));
+#endif
+
 		//Set focus to the view to get event
 	this->setFocus();
 }
@@ -268,7 +282,19 @@ void DiagramView::handleTextDrop(QDropEvent *e) {
 		iti -> setHtml (e -> mimeData() -> text());
 	}

-	m_diagram -> undoStack().push(new AddItemCommand<IndependentTextItem *>(iti, m_diagram, mapToScene(e->pos())));
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+
+	m_diagram -> undoStack().push(
+				new AddItemCommand<IndependentTextItem *>(
+					iti, m_diagram, mapToScene(e->pos())));
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	m_diagram -> undoStack().push(
+				new AddItemCommand<IndependentTextItem *>(
+					iti, m_diagram, e->position()));
+#endif
 }

 /**
@@ -423,7 +449,14 @@ void DiagramView::mousePressEvent(QMouseEvent *e)
 	if (m_event_interface && m_event_interface->mousePressEvent(e)) return;

 		//Start drag view when hold the middle button
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	if (e->button() == Qt::MidButton)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (e->button() == Qt::MiddleButton)
+#endif
 	{
 		m_drag_last_pos = e->pos();
 		viewport()->setCursor(Qt::ClosedHandCursor);
@@ -473,7 +506,14 @@ void DiagramView::mouseMoveEvent(QMouseEvent *e)
 	if (m_event_interface && m_event_interface->mouseMoveEvent(e)) return;

 		//Drag the view
-	if (e->buttons() == Qt::MidButton)
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (e->button() == Qt::MidButton)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (e->button() == Qt::MiddleButton)
+#endif
 	{
 		QScrollBar *h = horizontalScrollBar();
 		QScrollBar *v = verticalScrollBar();
@@ -534,7 +574,14 @@ void DiagramView::mouseReleaseEvent(QMouseEvent *e)
 	if (m_event_interface && m_event_interface->mouseReleaseEvent(e)) return;

 		//Stop drag view
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	if (e->button() == Qt::MidButton)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (e->button() == Qt::MiddleButton)
+#endif
 	{
 		viewport()->setCursor(Qt::ArrowCursor);
 	}
@@ -567,7 +614,15 @@ void DiagramView::mouseReleaseEvent(QMouseEvent *e)
 			});
 			QMenu *menu = new QMenu(this);
 			menu->addAction(act);
+
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 			menu->popup(e->globalPos());
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+			menu->popup(e->pos());
+#endif
 		}

 		m_free_rubberbanding = false;
--- a/sources/editor/elementview.cpp
+++ b/sources/editor/elementview.cpp
@@ -373,7 +373,14 @@ ElementContent ElementView::pasteWithOffset(const QDomDocument &xml_document) {
 	@param e QMouseEvent decrivant l'evenement souris
 */
 void ElementView::mousePressEvent(QMouseEvent *e) {
-	if (e->buttons() == Qt::MidButton)
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (e->button() == Qt::MidButton)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (e->button() == Qt::MiddleButton)
+#endif
 	{
 		setCursor( (Qt::ClosedHandCursor));
 		reference_view_ = e->pos();
@@ -387,7 +394,14 @@ void ElementView::mousePressEvent(QMouseEvent *e) {
 	Manage the event move mouse
 */
 void ElementView::mouseMoveEvent(QMouseEvent *e) {
-	if (e->buttons() == Qt::MidButton)
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (e->button() == Qt::MidButton)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (e->button() == Qt::MiddleButton)
+#endif
 	{
 		QScrollBar *h = horizontalScrollBar();
 		QScrollBar *v = verticalScrollBar();
@@ -405,7 +419,15 @@ void ElementView::mouseMoveEvent(QMouseEvent *e) {
 	Manage event release click mouse
 */
 void ElementView::mouseReleaseEvent(QMouseEvent *e) {
-	if (e -> button() == Qt::MidButton) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (e->button() == Qt::MidButton)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (e->button() == Qt::MiddleButton)
+#endif
+	{
 		setCursor(Qt::ArrowCursor);
 		adjustSceneRect();
 		return;
--- a/sources/editor/graphicspart/partarc.cpp
+++ b/sources/editor/graphicspart/partarc.cpp
@@ -61,7 +61,14 @@ void PartArc::paint(QPainter *painter, const QStyleOptionGraphicsItem *options,
 		//Always remove the brush
 	painter -> setBrush(Qt::NoBrush);
 	QPen t = painter -> pen();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	t.setCosmetic(options && options -> levelOfDetail < 1.0);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	t.setCosmetic(options && options -> levelOfDetailFromTransform(painter->worldTransform()) < 1.0);
+#endif
 	painter -> setPen(t);

 	if (isSelected())
--- a/sources/editor/graphicspart/partellipse.cpp
+++ b/sources/editor/graphicspart/partellipse.cpp
@@ -55,8 +55,15 @@ void PartEllipse::paint(QPainter *painter, const QStyleOptionGraphicsItem *optio
 	applyStylesToQPainter(*painter);

 	QPen t = painter -> pen();
-	t.setCosmetic(options && options -> levelOfDetail < 1.0);

+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	t.setCosmetic(options && options -> levelOfDetail < 1.0);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	t.setCosmetic(options && options -> levelOfDetailFromTransform(painter->worldTransform()) < 1.0);
+#endif
 	if (isSelected())
 		t.setColor(Qt::red);

--- a/sources/editor/graphicspart/partline.cpp
+++ b/sources/editor/graphicspart/partline.cpp
@@ -79,8 +79,15 @@ void PartLine::paint(QPainter *painter, const QStyleOptionGraphicsItem *options,
 	applyStylesToQPainter(*painter);
 	QPen t = painter -> pen();
 	t.setJoinStyle(Qt::MiterJoin);
-	t.setCosmetic(options && options -> levelOfDetail < 1.0);

+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	t.setCosmetic(options && options -> levelOfDetail < 1.0);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	t.setCosmetic(options && options -> levelOfDetailFromTransform(painter->worldTransform()) < 1.0);
+#endif
 	if (isSelected()) t.setColor(Qt::red);

 	painter -> setPen(t);
--- a/sources/editor/graphicspart/partpolygon.cpp
+++ b/sources/editor/graphicspart/partpolygon.cpp
@@ -66,7 +66,14 @@ void PartPolygon::paint(QPainter *painter, const QStyleOptionGraphicsItem *optio
 	applyStylesToQPainter(*painter);

 	QPen t = painter -> pen();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	t.setCosmetic(options && options -> levelOfDetail < 1.0);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	t.setCosmetic(options && options -> levelOfDetailFromTransform(painter->worldTransform()) < 1.0);
+#endif
 	if (isSelected()) t.setColor(Qt::red);
 	painter -> setPen(t);

--- a/sources/editor/graphicspart/partrectangle.cpp
+++ b/sources/editor/graphicspart/partrectangle.cpp
@@ -51,8 +51,14 @@ void PartRectangle::paint(QPainter *painter, const QStyleOptionGraphicsItem *opt
 	Q_UNUSED(widget);
 	applyStylesToQPainter(*painter);
 	QPen t = painter -> pen();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	t.setCosmetic(options && options -> levelOfDetail < 1.0);
-
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	t.setCosmetic(options && options -> levelOfDetailFromTransform(painter->worldTransform()) < 1.0);
+#endif
 	if (isSelected())
 		t.setColor(Qt::red);

--- a/sources/editor/graphicspart/partterminal.cpp
+++ b/sources/editor/graphicspart/partterminal.cpp
@@ -62,37 +62,52 @@ const QDomElement PartTerminal::toXml(QDomDocument &xml_document) const

 /**
 	Dessine la borne
-	@param p QPainter a utiliser pour rendre le dessin
+	@param painter QPainter a utiliser pour rendre le dessin
 	@param options Options pour affiner le rendu
 	@param widget Widget sur lequel le rendu est effectue
 */
-void PartTerminal::paint(QPainter *p, const QStyleOptionGraphicsItem *options, QWidget *widget) {
+void PartTerminal::paint(
+		QPainter *painter,
+		const QStyleOptionGraphicsItem *options,
+		QWidget *widget)
+{
 	Q_UNUSED(widget);
-	p -> save();
+	painter -> save();

 	// annulation des renderhints
-	p -> setRenderHint(QPainter::Antialiasing,          false);
-	p -> setRenderHint(QPainter::TextAntialiasing,      false);
-	p -> setRenderHint(QPainter::SmoothPixmapTransform, false);
+	painter -> setRenderHint(QPainter::Antialiasing,          false);
+	painter -> setRenderHint(QPainter::TextAntialiasing,      false);
+	painter -> setRenderHint(QPainter::SmoothPixmapTransform, false);

 	QPen t;
 	t.setWidthF(1.0);
-	t.setCosmetic(options && options -> levelOfDetail < 1.0);

+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	t.setCosmetic(options && options -> levelOfDetail < 1.0);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	t.setCosmetic(
+				options
+				&& options->levelOfDetailFromTransform(
+					painter->worldTransform())
+				< 1.0);
+#endif
 	// dessin de la borne en rouge
 	t.setColor(isSelected() ? Terminal::neutralColor : Qt::red);
-	p -> setPen(t);
-	p -> drawLine(QPointF(0.0, 0.0), d -> second_point);
+	painter -> setPen(t);
+	painter -> drawLine(QPointF(0.0, 0.0), d -> second_point);

 	// dessin du point d'amarrage au conducteur en bleu
 	t.setColor(isSelected() ? Qt::red : Terminal::neutralColor);
-	p -> setPen(t);
-	p -> setBrush(Terminal::neutralColor);
-	p -> drawPoint(QPointF(0.0, 0.0));
-	p -> restore();
+	painter -> setPen(t);
+	painter -> setBrush(Terminal::neutralColor);
+	painter -> drawPoint(QPointF(0.0, 0.0));
+	painter -> restore();

 	if (m_hovered)
-		drawShadowShape(p);
+		drawShadowShape(painter);
 }

 /**
--- a/sources/editor/graphicspart/partterminal.h
+++ b/sources/editor/graphicspart/partterminal.h
@@ -55,7 +55,10 @@ class PartTerminal : public CustomElementGraphicPart {
 		QString xmlName() const override { return(QString("terminal")); }
 		void fromXml(const QDomElement &) override;
 		const QDomElement toXml(QDomDocument &) const override;
-		void paint(QPainter *, const QStyleOptionGraphicsItem *, QWidget *) override;
+		void paint(
+				QPainter *painter,
+				const QStyleOptionGraphicsItem *,
+				QWidget *) override;

 		QPainterPath shape() const override;
 		QPainterPath shadowShape() const override {return shape();}
--- a/sources/editor/qetelementeditor.cpp
+++ b/sources/editor/qetelementeditor.cpp
@@ -1471,7 +1471,14 @@ void QETElementEditor::slot_createPartsList()
 				QString part_desc = cep -> name();
 				QListWidgetItem *qlwi = new QListWidgetItem(part_desc);
 				QVariant v;
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 				v.setValue<QGraphicsItem *>(qgi);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+				qDebug()<<"Help code for QT 6 or later";
+#endif
 				qlwi -> setData(42, v);
 				m_parts_list -> addItem(qlwi);
 				qlwi -> setSelected(qgi -> isSelected());
--- a/sources/machine_info.cpp
+++ b/sources/machine_info.cpp
@@ -46,9 +46,9 @@ void Machine_info::send_info_to_debug()
 {
 	qInfo()<<"debugging enabled:"
 		<< QLibraryInfo::isDebugBuild();
-
 	qInfo()<< "Qt library version:"
 		<< QLibraryInfo::version();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	qInfo()<< "Qt library location default prefix:"
 		<< QLibraryInfo::location(QLibraryInfo::PrefixPath);
 	qInfo()<< "Qt library location documentation:"
@@ -80,6 +80,43 @@ void Machine_info::send_info_to_debug()
 #ifndef Q_OS_WIN
 	qInfo()<< "Qt library location Qt settings:"
 		<< QLibraryInfo::location(QLibraryInfo::SettingsPath);
+#endif
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qInfo()<< "Qt library path default prefix:"
+		<< QLibraryInfo::path(QLibraryInfo::PrefixPath);
+	qInfo()<< "Qt library path documentation:"
+		<< QLibraryInfo::path(QLibraryInfo::DocumentationPath);
+	qInfo()<< "Qt library path headers:"
+		<< QLibraryInfo::path(QLibraryInfo::HeadersPath);
+	qInfo()<< "Qt library path libraries:"
+		<< QLibraryInfo::path(QLibraryInfo::LibrariesPath);
+	qInfo()<< "Qt library path executables:"
+		<< QLibraryInfo::path(QLibraryInfo::LibraryExecutablesPath);
+	qInfo()<< "Qt library path Qt binaries:"
+		<< QLibraryInfo::path(QLibraryInfo::BinariesPath);
+	qInfo()<< "Qt library path Qt plugins:"
+		<< QLibraryInfo::path(QLibraryInfo::PluginsPath);
+//	qInfo()<< "Qt library path installed QML extensions:"
+//		<< QLibraryInfo::path(QLibraryInfo::ImportsPath);
+	qInfo()<< "Qt library path installed QML extensions:"
+		<< QLibraryInfo::path(QLibraryInfo::Qml2ImportsPath);
+	qInfo()<< "Qt library path dependent Qt data:"
+		<< QLibraryInfo::path(QLibraryInfo::ArchDataPath);
+	qInfo()<< "Qt library path independent Qt data:"
+		<< QLibraryInfo::path(QLibraryInfo::DataPath);
+	qInfo()<< "Qt library path translation:"
+		<< QLibraryInfo::path(QLibraryInfo::TranslationsPath);
+	qInfo()<< "Qt library path examples:"
+		<< QLibraryInfo::path(QLibraryInfo::ExamplesPath);
+	qInfo()<< "Qt library path Qt testcases:"
+		<< QLibraryInfo::path(QLibraryInfo::TestsPath);
+#ifndef Q_OS_WIN
+	qInfo()<< "Qt library path Qt settings:"
+		<< QLibraryInfo::path(QLibraryInfo::SettingsPath);
+#endif
 #endif
 	qInfo()<< "GitRevision " + QString(GIT_COMMIT_SHA);
 	qInfo()<< "QElectroTech V " + QET::displayedVersion;
--- a/sources/main.cpp
+++ b/sources/main.cpp
@@ -166,7 +166,13 @@ int main(int argc, char **argv)
 	QCoreApplication::setApplicationName("QElectroTech");
 	//Creation and execution of the application
 	//HighDPI
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+#endif
 	SingleApplication app(argc, argv, true);
 #ifdef Q_OS_MACOS
 	//Handle the opening of QET when user double click on a .qet .elmt .tbt file
--- a/sources/print/projectprintwindow.cpp
+++ b/sources/print/projectprintwindow.cpp
@@ -23,7 +23,13 @@
 #include "qeticons.h"

 #include <QPrintPreviewWidget>
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 #include <QDesktopWidget>
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+#endif
 #include <QScreen>
 #include <QPainter>
 #include <QPageSetupDialog>
@@ -45,7 +51,14 @@ void ProjectPrintWindow::launchDialog(QETProject *project, QWidget *parent)
 	}

 	auto printer_ = new QPrinter();
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	printer_->setOrientation(QPrinter::Landscape);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+#endif
 	printer_->setDocName(doc_name);
 	printer_->setOutputFileName(file_name);
 	printer_->setCreator(QString("QElectroTech %1").arg(QET::displayedVersion));
@@ -55,7 +68,14 @@ void ProjectPrintWindow::launchDialog(QETProject *project, QWidget *parent)
 print_dialog.setWindowFlags(Qt::Sheet);
 #endif
 	print_dialog.setWindowTitle(tr("Options d'impression", "window title"));
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	print_dialog.setEnabledOptions(QAbstractPrintDialog::PrintToFile | QAbstractPrintDialog::PrintShowPageSize);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+#endif
 	if (print_dialog.exec() == QDialog::Rejected) {
 		delete  printer_;
 		return;
@@ -213,8 +233,15 @@ void ProjectPrintWindow::printDiagram(Diagram *diagram, bool fit_page, QPainter
 		diagram->render(painter, QRectF(), diagram_rect, Qt::KeepAspectRatio);
 	} else {
 			//Print on one or several pages
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 		auto printed_rect = full_page ? printer->paperRect() : printer->pageRect();
-
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+	auto printed_rect = full_page ? printer->paperRect(QPrinter::Millimeter) : printer->pageRect(QPrinter::Millimeter);
+#endif
 		auto used_width  = printed_rect.width();
 		auto used_height = printed_rect.height();
 		auto h_pages_count = horizontalPagesCount(diagram, option, full_page);
@@ -231,9 +258,16 @@ void ProjectPrintWindow::printDiagram(Diagram *diagram, bool fit_page, QPainter
 			auto x_offset = 0;
 			for (auto j=0 ; j<h_pages_count ; ++j)
 			{
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 				page_grid.last() << QRect(QPoint(x_offset, y_offset),
 										  QSize(qMin(used_width, diagram_rect.width() - x_offset),
 												qMin(used_height, diagram_rect.height() - y_offset)));
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+				qDebug()<<"Help code for QT 6 or later";
+#endif
 				x_offset += used_width;
 			}
 			y_offset += used_height;
@@ -294,9 +328,18 @@ QRect ProjectPrintWindow::diagramRect(Diagram *diagram, const ExportProperties &
 * @return The width of the "poster" in number of page for print the diagram
 * with the orientation and the paper format used by the actual printer
 */
-int ProjectPrintWindow::horizontalPagesCount(Diagram *diagram, const ExportProperties &option, bool full_page) const
+int ProjectPrintWindow::horizontalPagesCount(
+		Diagram *diagram, const ExportProperties &option, bool full_page) const
 {
-	QRect printable_area = full_page ? m_printer-> paperRect() : m_printer-> pageRect();
+	QRect printable_area;
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	printable_area = full_page ? m_printer-> paperRect() : m_printer-> pageRect();
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+				qDebug()<<"Help code for QT 6 or later";
+#endif
 	QRect diagram_rect = diagramRect(diagram, option);

 	int h_pages_count = int(ceil(qreal(diagram_rect.width()) / qreal(printable_area.width())));
@@ -311,9 +354,18 @@ int ProjectPrintWindow::horizontalPagesCount(Diagram *diagram, const ExportPrope
 * @return The height of the "poster" in number of pages for print the diagram
 * with the orientation and paper format used by the actual printer
 */
-int ProjectPrintWindow::verticalPagesCount(Diagram *diagram, const ExportProperties &option, bool full_page) const
+int ProjectPrintWindow::verticalPagesCount(
+		Diagram *diagram, const ExportProperties &option, bool full_page) const
 {
-	QRect printable_area = full_page ? m_printer->paperRect() : m_printer->pageRect();
+	QRect printable_area;
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	printable_area = full_page ? m_printer->paperRect() : m_printer->pageRect();
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+				qDebug()<<"Help code for QT 6 or later";
+#endif
 	QRect diagram_rect = diagramRect(diagram, option);

 	int v_pages_count = int(ceil(qreal(diagram_rect.height()) / qreal(printable_area.height())));
@@ -371,6 +423,7 @@ QString ProjectPrintWindow::settingsSectionName(const QPrinter *printer)

 void ProjectPrintWindow::loadPageSetupForCurrentPrinter()
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	QSettings settings;
 	QString printer_section = settingsSectionName(m_printer);

@@ -413,10 +466,17 @@ void ProjectPrintWindow::loadPageSetupForCurrentPrinter()

 	settings.endGroup();
 	settings.endGroup();
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+#endif
 }

 void ProjectPrintWindow::savePageSetupForCurrentPrinter()
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	QSettings settings;
 	QString printer_section = settingsSectionName(m_printer);

@@ -444,6 +504,12 @@ void ProjectPrintWindow::savePageSetupForCurrentPrinter()
 	settings.endGroup();
 	settings.endGroup();
 	settings.sync();
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+#endif
 }

 /**
--- a/sources/qet.cpp
+++ b/sources/qet.cpp
@@ -25,6 +25,7 @@
 #include <QSaveFile>
 #include <QTextStream>
 #include <QRegularExpression>
+#include <QActionGroup>

 /**
 	Permet de convertir une chaine de caracteres ("n", "s", "e" ou "w")
@@ -164,9 +165,9 @@ bool QET::lineContainsPoint(const QLineF &line, const QPointF &point) {
 	@return true si le projete orthogonal du point sur la droite appartient au
 	segment de droite.
 */
-bool QET::orthogonalProjection(const QPointF &point,
-			       const QLineF &line,
-			       QPointF *intersection) {
+bool QET::orthogonalProjection(
+		const QPointF &point,const QLineF &line,QPointF *intersection)
+{
 	// recupere le vecteur normal de `line'
 	QLineF line_normal_vector(line.normalVector());
 	QPointF normal_vector(line_normal_vector.dx(), line_normal_vector.dy());
@@ -210,9 +211,9 @@ bool QET::orthogonalProjection(const QPointF &point,
 	@param entier Pointeur facultatif vers un entier
 	@return true si l'attribut est bien un entier, false sinon
 */
-bool QET::attributeIsAnInteger(const QDomElement &e,
-			       const QString& nom_attribut,
-			       int *entier) {
+bool QET::attributeIsAnInteger(
+		const QDomElement &e,const QString& nom_attribut,int *entier)
+{
 	// verifie la presence de l'attribut
 	if (!e.hasAttribute(nom_attribut)) return(false);
 	// verifie la validite de l'attribut
@@ -231,9 +232,9 @@ bool QET::attributeIsAnInteger(const QDomElement &e,
 	@param reel Pointeur facultatif vers un double
 	@return true si l'attribut est bien un reel, false sinon
 */
-bool QET::attributeIsAReal(const QDomElement &e,
-			   const QString& nom_attribut,
-			   qreal *reel) {
+bool QET::attributeIsAReal(
+		const QDomElement &e,const QString& nom_attribut,qreal *reel)
+{
 	// verifie la presence de l'attribut
 	if (!e.hasAttribute(nom_attribut)) return(false);
 	// verifie la validite de l'attribut
@@ -258,7 +259,8 @@ bool QET::attributeIsAReal(const QDomElement &e,
 	@return la proposition decrivant le nombre d'elements, de conducteurs et de
 	textes
 */
-QString QET::ElementsAndConductorsSentence(int elements_count,
+QString QET::ElementsAndConductorsSentence(
+		int elements_count,
 		int conductors_count,
 		int texts_count,
 		int images_count,
@@ -333,9 +335,14 @@ QString QET::ElementsAndConductorsSentence(int elements_count,
 /**
 	@return the list of \a tag_name elements directly under the \a e XML element.
 */
-QList<QDomElement> QET::findInDomElement(const QDomElement &e, const QString &tag_name) {
+QList<QDomElement> QET::findInDomElement(
+		const QDomElement &e, const QString &tag_name)
+{
 	QList<QDomElement> return_list;
-	for (QDomNode node = e.firstChild() ; !node.isNull() ; node = node.nextSibling()) {
+	for (QDomNode node = e.firstChild() ;
+		 !node.isNull() ;
+		 node = node.nextSibling())
+	{
 		if (!node.isElement()) continue;
 		QDomElement element = node.toElement();
 		if (element.isNull() || element.tagName() != tag_name) continue;
@@ -352,18 +359,24 @@ QList<QDomElement> QET::findInDomElement(const QDomElement &e, const QString &ta
 	@param children tag XML a rechercher
 	@return La liste des elements XML children
 */
-QList<QDomElement> QET::findInDomElement(const QDomElement &e,
-					 const QString &parent,
-					 const QString &children) {
+QList<QDomElement> QET::findInDomElement(
+		const QDomElement &e,const QString &parent,const QString &children)
+{
 	QList<QDomElement> return_list;

 	// parcours des elements parents
-	for (QDomNode enfant = e.firstChild() ; !enfant.isNull() ; enfant = enfant.nextSibling()) {
+	for (QDomNode enfant = e.firstChild() ;
+		 !enfant.isNull() ;
+		 enfant = enfant.nextSibling())
+	{
 		// on s'interesse a l'element XML "parent"
 		QDomElement parents = enfant.toElement();
 		if (parents.isNull() || parents.tagName() != parent) continue;
 		// parcours des enfants de l'element XML "parent"
-		for (QDomNode node_children = parents.firstChild() ; !node_children.isNull() ; node_children = node_children.nextSibling()) {
+		for (QDomNode node_children = parents.firstChild() ;
+			 !node_children.isNull() ;
+			 node_children = node_children.nextSibling())
+		{
 			// on s'interesse a l'element XML "children"
 			QDomElement n_children = node_children.toElement();
 			if (!n_children.isNull() && n_children.tagName() == children) return_list.append(n_children);
@@ -404,8 +417,8 @@ QString QET::license()
 */
 QList<QChar> QET::forbiddenCharacters()
 {
-	return(QList<QChar>() << '\\' << '/' << ':' << '*' << '?' << '"'
-	       << '<' << '>' << '|');
+	return(QList<QChar>()
+		   << '\\' << '/' << ':' << '*' << '?' << '"'<< '<' << '>' << '|');
 }

 /**
@@ -614,7 +627,14 @@ bool QET::writeXmlFile(QDomDocument &xml_doc, const QString &filepath, QString *
 	}

 	QTextStream out(&file);
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	out.setCodec("UTF-8");
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	out.setEncoding(QStringConverter::Utf8);
+#endif
 	out.setGenerateByteOrderMark(false);
 	out << xml_doc.toString(4);
 	if  (!file.commit())
@@ -741,7 +761,14 @@ bool QET::writeToFile(QDomDocument &xml_doc, QFile *file, QString *error_message

 	QTextStream out(file);
 	out.seek(0);
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	out.setCodec("UTF-8");
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	out.setEncoding(QStringConverter::Utf8);
+#endif
 	out.setGenerateByteOrderMark(false);
 	out << xml_doc.toString(4);
 	if (opened_here) {
--- a/sources/qetapp.cpp
+++ b/sources/qetapp.cpp
@@ -167,7 +167,14 @@ void QETApp::setLanguage(const QString &desired_language) {
 	QString languages_path = languagesPath();

 	// load Qt library translations
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	QString qt_l10n_path = QLibraryInfo::location(QLibraryInfo::TranslationsPath);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	QString qt_l10n_path = QLibraryInfo::path(QLibraryInfo::TranslationsPath);
+#endif
 	if (!qtTranslator.load("qt_" + desired_language, qt_l10n_path)) {
 		qtTranslator.load("qt_" + desired_language, languages_path);
 	}
@@ -1155,8 +1162,9 @@ QFont QETApp::diagramTextsItemFont(qreal size)
 							   "Sans Serif").toString();
 	qreal diagram_texts_item_size     = settings.value("diagramitemsize",
 							   9.0).toDouble();
-	qreal diagram_texts_item_weight   = settings.value("diagramitemweight"
-							   ).toDouble();
+	auto diagram_texts_item_weight =
+			static_cast<QFont::Weight>(
+				settings.value("diagramitemweight").toInt());
 	QString diagram_texts_item_style  = settings.value("diagramitemstyle",
 							   "normal").toString();

--- a/sources/qetgraphicsitem/ViewItem/qetgraphicstableitem.cpp
+++ b/sources/qetgraphicsitem/ViewItem/qetgraphicstableitem.cpp
@@ -970,6 +970,7 @@ void QetGraphicsTableItem::adjustColumnsWidth()
 	int sum_=0;
 	for(auto i= 0 ; i<m_model->columnCount() ; ++i)
 	{
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 		auto at_a = std::min(m_minimum_column_width.size()-1, i);               //In case of the I is higher than m_minimum_column_width or
 		auto at_b = std::min(m_header_item->minimumSectionWidth().size()-1, i); //m_header_item->minimumSectionWidth().size()
 		m_header_item->resizeSection(
@@ -978,6 +979,12 @@ void QetGraphicsTableItem::adjustColumnsWidth()
 						m_minimum_column_width.at(at_a),
 						m_header_item->minimumSectionWidth().at(at_b))+b);
 		sum_+= m_header_item->sectionSize(i);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+		qDebug()<<"Help code for QT 6 or later";
+#endif
 	}


--- a/sources/qetgraphicsitem/conductor.cpp
+++ b/sources/qetgraphicsitem/conductor.cpp
@@ -470,15 +470,15 @@ QPointF Conductor::extendTerminal(const QPointF &terminal, Qet::Orientation term

 /**
 	Dessine le conducteur sans antialiasing.
-	@param qp Le QPainter a utiliser pour dessiner le conducteur
+	@param painter Le QPainter a utiliser pour dessiner le conducteur
 	@param options Les options de style pour le conducteur
 	@param qw Le QWidget sur lequel on dessine
 */
-void Conductor::paint(QPainter *qp, const QStyleOptionGraphicsItem *options, QWidget *qw)
+void Conductor::paint(QPainter *painter, const QStyleOptionGraphicsItem *options, QWidget *qw)
 {
 	Q_UNUSED(qw);
-	qp -> save();
-	qp -> setRenderHint(QPainter::Antialiasing, false);
+	painter -> save();
+	painter -> setRenderHint(QPainter::Antialiasing, false);

 		// Set the color of conductor
 	QColor final_conductor_color(m_properties.color);
@@ -500,7 +500,7 @@ void Conductor::paint(QPainter *qp, const QStyleOptionGraphicsItem *options, QWi
 	conductor_pen.setWidthF(m_mouse_over? (m_properties.cond_size) +4 : (m_properties.cond_size));

 		//Set the QPen and QBrush to the QPainter
-	qp -> setBrush(conductor_brush);
+	painter -> setBrush(conductor_brush);
 	QPen final_conductor_pen = conductor_pen;

 		//Set the conductor style
@@ -509,14 +509,22 @@ void Conductor::paint(QPainter *qp, const QStyleOptionGraphicsItem *options, QWi
 	final_conductor_pen.setJoinStyle(Qt::SvgMiterJoin); // better rendering with dot

 		//Use a cosmetique line, below a certain zoom
-	if (options && options -> levelOfDetail < 1.0) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (options && options -> levelOfDetail < 1.0)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (options && options->levelOfDetailFromTransform(painter->worldTransform()) < 1.0)
+#endif
+	{
 		final_conductor_pen.setCosmetic(true);
 	}

-	qp -> setPen(final_conductor_pen);
+	painter -> setPen(final_conductor_pen);

 		//Draw the conductor
-	qp -> drawPath(path());
+	painter -> drawPath(path());
 		//Draw the second color
 	if(m_properties.m_bicolor)
 	{
@@ -525,20 +533,20 @@ void Conductor::paint(QPainter *qp, const QStyleOptionGraphicsItem *options, QWi
 		QVector<qreal> dash_pattern;
 		dash_pattern << m_properties.m_dash_size-2 << m_properties.m_dash_size;
 		final_conductor_pen.setDashPattern(dash_pattern);
-		qp->save();
-		qp->setPen(final_conductor_pen);
-		qp->drawPath(path());
-		qp->restore();
+		painter->save();
+		painter->setPen(final_conductor_pen);
+		painter->drawPath(path());
+		painter->restore();
 	}

 	if (m_properties.type == ConductorProperties::Single) {
-		qp -> setBrush(final_conductor_color);
+		painter -> setBrush(final_conductor_color);
 		m_properties.singleLineProperties.draw(
-			qp,
+			painter,
 			middleSegment() -> isHorizontal() ? QET::Horizontal : QET::Vertical,
 			QRectF(middleSegment() -> middle() - QPointF(12.0, 12.0), QSizeF(24.0, 24.0))
 		);
-		if (isSelected()) qp -> setBrush(Qt::NoBrush);
+		if (isSelected()) painter -> setBrush(Qt::NoBrush);
 	}

 		//Draw the junctions
@@ -546,15 +554,15 @@ void Conductor::paint(QPainter *qp, const QStyleOptionGraphicsItem *options, QWi
 	if (!junctions_list.isEmpty()) {
 		final_conductor_pen.setStyle(Qt::SolidLine);
 		QBrush junction_brush(final_conductor_color, Qt::SolidPattern);
-		qp -> setPen(final_conductor_pen);
-		qp -> setBrush(junction_brush);
-		qp -> setRenderHint(QPainter::Antialiasing, true);
+		painter -> setPen(final_conductor_pen);
+		painter -> setBrush(junction_brush);
+		painter -> setRenderHint(QPainter::Antialiasing, true);
 		foreach(QPointF point, junctions_list) {
-			qp -> drawEllipse(QRectF(point.x() - 1.5, point.y() - 1.5, 3.0, 3.0));
+			painter -> drawEllipse(QRectF(point.x() - 1.5, point.y() - 1.5, 3.0, 3.0));
 		}
 	}

-	qp -> restore();
+	painter -> restore();
 }

 /// @return le Diagram auquel ce conducteur appartient, ou 0 si ce conducteur est independant
--- a/sources/qetgraphicsitem/element.cpp
+++ b/sources/qetgraphicsitem/element.cpp
@@ -33,6 +33,7 @@
 #include "elementtextitemgroup.h"
 #include "elementpicturefactory.h"
 #include "iostream"
+#include <QDomElement>

 class ElementXmlRetroCompatibility
 {
@@ -210,7 +211,15 @@ void Element::paint(
 		drawHighlight(painter, options);
 	}

-	if (options && options -> levelOfDetail < 1.0) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (options && options -> levelOfDetail < 1.0)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (options && options->levelOfDetailFromTransform(painter->worldTransform()) < 1.0)
+#endif
+	{
 		painter->drawPicture(0, 0, m_low_zoom_picture);
 	} else {
 		painter->drawPicture(0, 0, m_picture);
@@ -762,8 +771,14 @@ bool Element::fromXml(
 								  "links_uuids",
 								  "link_uuid");
 	foreach (QDomElement qdo, uuid_list)
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 		tmp_uuids_link << qdo.attribute("uuid");
-
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+		qDebug()<<"Help code for QT 6 or later";
+#endif
 	//uuid of this element
 	m_uuid= QUuid(e.attribute("uuid", QUuid::createUuid().toString()));

--- a/sources/qetgraphicsitem/terminal.cpp
+++ b/sources/qetgraphicsitem/terminal.cpp
@@ -262,23 +262,30 @@ void Terminal::removeConductor(Conductor *conductor)
 /**
 	@brief Terminal::paint
 	Fonction de dessin des bornes
-	@param p Le QPainter a utiliser
+	@param painter Le QPainter a utiliser
 	@param options Les options de dessin
 */
 void Terminal::paint(
-		QPainter *p,
+		QPainter *painter,
 		const QStyleOptionGraphicsItem *options,
 		QWidget *)
 {
 	// en dessous d'un certain zoom, les bornes ne sont plus dessinees
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	if (options && options -> levelOfDetail < 0.5) return;
-
-	p -> save();
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (options && options->levelOfDetailFromTransform(painter->worldTransform()) < 0.5)
+		return;
+#endif
+	painter -> save();

 	//annulation des renderhints
-	p -> setRenderHint(QPainter::Antialiasing,          false);
-	p -> setRenderHint(QPainter::TextAntialiasing,      false);
-	p -> setRenderHint(QPainter::SmoothPixmapTransform, false);
+	painter -> setRenderHint(QPainter::Antialiasing,          false);
+	painter -> setRenderHint(QPainter::TextAntialiasing,      false);
+	painter -> setRenderHint(QPainter::SmoothPixmapTransform, false);

 	// on travaille avec les coordonnees de l'element parent
 	QPointF c = mapFromParent(d->m_pos);
@@ -287,23 +294,31 @@ void Terminal::paint(
 	QPen t;
 	t.setWidthF(1.0);

-	if (options && options -> levelOfDetail < 1.0) {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
+	if (options && options -> levelOfDetail < 1.0)
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	if (options && options->levelOfDetailFromTransform(painter->worldTransform()) < 1.0)
+#endif
+	{
 		t.setCosmetic(true);
 	}

 	// dessin de la borne en rouge
 	t.setColor(Qt::red);
-	p -> setPen(t);
-	p -> drawLine(c, e);
+	painter -> setPen(t);
+	painter -> drawLine(c, e);

 	// dessin du point d'amarrage au conducteur en bleu
 	t.setColor(hovered_color_);
-	p -> setPen(t);
-	p -> setBrush(hovered_color_);
+	painter -> setPen(t);
+	painter -> setBrush(hovered_color_);
 	if (hovered_) {
-		p -> setRenderHint(QPainter::Antialiasing, true);
-		p -> drawEllipse(QRectF(c.x() - 2.5, c.y() - 2.5, 5.0, 5.0));
-	} else p -> drawPoint(c);
+		painter -> setRenderHint(QPainter::Antialiasing, true);
+		painter -> drawEllipse(QRectF(c.x() - 2.5, c.y() - 2.5, 5.0, 5.0));
+	} else painter -> drawPoint(c);

 	//Draw help line if needed,
 	if (diagram() && m_draw_help_line)
@@ -365,7 +380,7 @@ void Terminal::paint(
 		m_help_line_a -> setLine(line);
 	}

-	p -> restore();
+	painter -> restore();
 }

 /**
--- a/sources/qetgraphicsitem/terminal.h
+++ b/sources/qetgraphicsitem/terminal.h
@@ -61,7 +61,9 @@ class Terminal : public QGraphicsObject
 		*/
 		int type() const override { return Type; }

-		void   paint        (QPainter *,const QStyleOptionGraphicsItem *,
+		void paint(
+				QPainter *painter,
+				const QStyleOptionGraphicsItem *,
 				QWidget *) override;
 		void   drawHelpLine (bool draw = true);
 		QLineF HelpLine     () const;
--- a/sources/qetproject.cpp
+++ b/sources/qetproject.cpp
@@ -16,11 +16,6 @@
 	along with QElectroTech.  If not, see <http://www.gnu.org/licenses/>.
 */

-#include <QTimer>
-#include <QStandardPaths>
-#include <utility>
-#include <QtConcurrent>
-#include <QHash>

 #include "qetproject.h"
 #include "diagram.h"
@@ -37,6 +32,13 @@
 #include "numerotationcontextcommands.h"
 #include "assignvariables.h"

+#include <QTimer>
+#include <QStandardPaths>
+#include <utility>
+#include <QtConcurrent>
+#include <QHash>
+#include <QtDebug>
+
 static int BACKUP_INTERVAL = 120000; //interval in ms of backup = 2min

 /**
@@ -1691,11 +1693,16 @@ NamesList QETProject::namesListForIntegrationCategory()
 */
 void QETProject::writeBackup()
 {
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	QDomDocument xml_project(toXml());
-	QtConcurrent::run(QET::writeToFile,
-					  xml_project,
-					  &m_backup_file,
-					  nullptr);
+	QtConcurrent::run(
+				QET::writeToFile,xml_project,&m_backup_file,nullptr);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	qDebug()<<"Help code for QT 6 or later";
+#endif
 }

 /**
--- a/sources/qetxml.cpp
+++ b/sources/qetxml.cpp
@@ -274,7 +274,14 @@ bool QETXML::writeXmlFile(
 	}

 	QTextStream out(&file);
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	out.setCodec("UTF-8");
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	out.setEncoding(QStringConverter::Utf8);
+#endif
 	out.setGenerateByteOrderMark(false);
 	out << xml_document.toString(4);
 	file.close();
--- a/sources/qtextorientationwidget.cpp
+++ b/sources/qtextorientationwidget.cpp
@@ -17,6 +17,7 @@
 */
 #include "qtextorientationwidget.h"
 #include <algorithm>
+#include <QMouseEvent>

 /**
 	Constructeur
@@ -254,8 +255,14 @@ void QTextOrientationWidget::paintEvent(QPaintEvent *event) {
 */
 void QTextOrientationWidget::mouseMoveEvent(QMouseEvent *event) {
 	if (read_only_) return;
-	
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	bool drawn_angle_hovered = positionIsASquare(event -> localPos(), &highlight_angle_);
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	bool drawn_angle_hovered = positionIsASquare(event -> position(), &highlight_angle_);
+#endif

 	if (must_highlight_angle_ != drawn_angle_hovered) {
 		must_highlight_angle_ = drawn_angle_hovered;
@@ -271,8 +278,14 @@ void QTextOrientationWidget::mouseReleaseEvent(QMouseEvent *event) {
 	if (read_only_) return;

 	double clicked_angle;
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 	bool drawn_angle_clicked = positionIsASquare(event -> localPos(), &clicked_angle);
-	
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+	bool drawn_angle_clicked = positionIsASquare(event -> position(), &clicked_angle);
+#endif
 	if (drawn_angle_clicked) {
 		setOrientation(clicked_angle);
 		emit(orientationChanged(clicked_angle));
--- a/sources/richtext/richtexteditor.cpp
+++ b/sources/richtext/richtexteditor.cpp
@@ -75,6 +75,7 @@
 #include <QHBoxLayout>
 #include <QPushButton>
 #include <QDialogButtonBox>
+#include <QActionGroup>

 QT_BEGIN_NAMESPACE

@@ -86,14 +87,14 @@ QT_BEGIN_NAMESPACE

 namespace qdesigner_internal {
 	// Richtext simplification filter helpers: Elements to be discarded
-	static inline bool filterElement(const QStringRef &name)
+	static inline bool filterElement(const QStringView &name)
 	{
 		return name != QLatin1String("meta") && name != QLatin1String("style");
 	}

 	// Richtext simplification filter helpers: Filter attributes of elements
 	static inline void filterAttributes(
-			const QStringRef &name,
+			const QStringView &name,
 			QXmlStreamAttributes *atts,
 			bool *paragraphAlignmentFound)
 	{
@@ -122,8 +123,8 @@ namespace qdesigner_internal {
 		}
 	}

-	// Richtext simplification filter helpers: Check for blank QStringRef.
-	static inline bool isWhiteSpace(const QStringRef &in)
+	// Richtext simplification filter helpers: Check for blank QStringView.
+	static inline bool isWhiteSpace(const QStringView &in)
 	{
 		const int count = in.size();
 		for (int i = 0; i < count; i++)
@@ -150,7 +151,7 @@ namespace qdesigner_internal {
 			case QXmlStreamReader::StartElement:
 				elementCount++;
 				if (filterElement(reader.name())) {
-					const QStringRef name = reader.name();
+					const QStringView name = reader.name();
 					QXmlStreamAttributes attributes = reader.attributes();
 					filterAttributes(name, &attributes, &paragraphAlignmentFound);
 					writer.writeStartElement(name.toString());
--- a/sources/titleblocktemplate.cpp
+++ b/sources/titleblocktemplate.cpp
@@ -430,10 +430,10 @@ void TitleBlockTemplate::parseColumns(const QString &cols_string) {
 	QRegularExpression abs_col_size_format,rel_col_size_format;
 	abs_col_size_format.setPattern("^([0-9]+)(?:px)?$");
 	abs_col_size_format.setPatternOptions(QRegularExpression::CaseInsensitiveOption);
-	//QRegExp rel_col_size_format("^([rt])([0-9]+)%$", Qt::CaseInsensitive);
 	rel_col_size_format.setPattern("^([rt])([0-9]+)%$");
 	rel_col_size_format.setPatternOptions(QRegularExpression::CaseInsensitiveOption);
 	bool conv_ok;
+	qDebug() <<"is QRegularExpression ok?";

 #if QT_VERSION < QT_VERSION_CHECK(5, 14, 0)	// ### Qt 6: remove
 	QStringList cols_descriptions =
--- a/sources/undocommand/deleteqgraphicsitemcommand.cpp
+++ b/sources/undocommand/deleteqgraphicsitemcommand.cpp
@@ -191,7 +191,14 @@ void DeleteQGraphicsItemCommand::setPotentialsOfRemovedElements()

 				if (exist_ == false)
 				{
+#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)	// ### Qt 6: remove
 					m_connected_terminals.append(qMakePair<Terminal *, Terminal *>(hub_terminal, t));
+#else
+#if TODO_LIST
+#pragma message("@TODO remove code for QT 6 or later")
+#endif
+					qDebug()<<"Help code for QT 6 or later";
+#endif
 					Conductor *new_cond = new Conductor(hub_terminal, t);
 					new_cond->setProperties(properties);
 					new AddItemCommand<Conductor*>(new_cond, t->diagram(), QPointF(), this);
--- a/sources/undocommand/linkelementcommand.cpp
+++ b/sources/undocommand/linkelementcommand.cpp
@@ -285,6 +285,10 @@ void LinkElementCommand::makeLink(const QList<Element *> &element_list)

 	//All elements stored in to_unlink is unwanted we unlink it from m_element
 	if (!to_unlink.isEmpty())
+	{
 		foreach(Element *elmt, to_unlink)
+		{
 			m_element->unlinkElement(elmt);
 		}
+	}
+}