Reapply "Add cable management: drawing, cores, numbering, cross-references and cable list"

This reverts commit 2bb3343d2d.

sources/cable/cablepropertieseditorwidget.h

@@ -0,0 +1,115 @@
+/*
+	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 CABLEPROPERTIESEDITORWIDGET_H
+#define CABLEPROPERTIESEDITORWIDGET_H
+
+#include "cable.h"
+
+#include "../PropertiesEditor/propertieseditorwidget.h"
+
+#include <QList>
+#include <QMetaObject>
+#include <QPointer>
+
+class CablePropertiesWidget;
+class CablePart;
+class QLabel;
+class QListWidget;
+class QListWidgetItem;
+
+/**
+	@brief The cable shown in the "Propriétés de la sélection" panel.
+
+	Selecting a line of a cable used to bring up nothing at all there:
+	the panel only knew the item types it already had an editor for.
+	Now it holds the very fields the cable is filled in with -- each of
+	them with its own tick saying whether the drawing shows it -- and
+	what stands there is written back live, one undo step per edit.
+*/
+class CablePropertiesEditorWidget : public PropertiesEditorWidget
+{
+		Q_OBJECT
+
+	public:
+		explicit CablePropertiesEditorWidget(Cable *cable = nullptr,
+											 CablePart *part = nullptr,
+											 QWidget *parent = nullptr);
+
+		void setCable(Cable *cable, CablePart *part = nullptr);
+
+		void apply() override;
+		void reset() override;
+		void updateUi() override;
+		QUndoCommand *associatedUndo() const override;
+		QString title() const override;
+		bool setLiveEdit(bool live_edit) override;
+
+	private:
+			///Write what is being typed onto the cable right away
+		void applyLive();
+			///He asked for the window choosing another type for this cable
+		void changeTypeRequested();
+			///Say how many cores of this cable are wired
+		void updateInfo();
+			/**
+				List the cores which stand nowhere on the sheet yet, under
+				the count of wired ones: those are the ones he can still
+				put down, and double-clicking one puts it down straight
+				from here, on the line this panel was opened for.
+			*/
+		void updateFreeCores();
+			///He double-clicked one of those cores: give it this line
+		void placeRequested(QListWidgetItem *item);
+			/**
+				He right-clicked one of them: a small menu with the one
+				thing which can be done to a core which stands nowhere
+				-- putting it down -- for whoever does not know that a
+				double click does the same.
+				@param pos where he clicked, in list coordinates
+			*/
+		void freeCoreMenu(const QPoint &pos);
+
+	private:
+		CablePropertiesWidget *m_fields = nullptr;
+		QLabel *m_info = nullptr;
+			///The cores which stand nowhere yet, listed under the count
+		QLabel *m_free_label = nullptr;
+		QListWidget *m_free_cores = nullptr;
+		QPointer<Cable> m_cable;
+			/**
+				The line this panel was opened by, which is the one a core
+				picked here is put down on: taking a core always belongs to
+				the line whose dialog was asked for, never to the first
+				line of the cable. Null while no single line is selected,
+				and then there is nothing to put a core down on and the
+				list takes no room.
+			*/
+		QPointer<CablePart> m_part;
+			///What the panel showed before the edit: the fields which
+			///differ from it are the ones the user changed
+		CableProperties m_shown;
+			///The cable the text is being typed straight into, so that
+			///reading the cable back only skips the very field which is
+			///under the fingers of the user -- and never for another
+			///cable which has just become the selected one
+		QPointer<Cable> m_live_cable;
+		QMetaObject::Connection m_live_connection;
+		bool m_updating = false;
+};
+
+#endif // CABLEPROPERTIESEDITORWIDGET_H