Import dxf is managed by undo command

sources/editor/UndoCommand/openelmtcommand.cpp

@@ -0,0 +1,62 @@
+/*
+	Copyright 2006-2022 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 "openelmtcommand.h"
+#include "../elementscene.h"
+
+#include <QDomDocument>
+#include <QObject>
+
+OpenElmtCommand::OpenElmtCommand(const QDomDocument &document,
+								 QPointer<ElementScene> scene,
+								 QUndoCommand *parent) :
+	QUndoCommand{parent},
+	m_document{document.cloneNode().toDocument()},
+	m_scene{scene}
+{
+	setText(QObject::tr("Ouvrir un element"));
+}
+
+void OpenElmtCommand::undo()
+{
+	for (const auto &item : qAsConst(m_graphics_item)) {
+		m_scene->removeItem(item);
+	}
+}
+
+void OpenElmtCommand::redo()
+{
+	if (!m_scene) {
+		return;
+	}
+
+	if (m_first_redo)
+	{
+		m_scene->fromXml(m_document, QPointF(), true, &m_graphics_item);
+		m_first_redo = false;
+
+			//m_document is now useless,
+			//we clear it to use less memory
+		m_document.clear();
+	}
+	else {
+		for (const auto &item : qAsConst(m_graphics_item)) {
+			m_scene->addItem(item);
+		}
+	}
+	m_scene->slot_select(m_graphics_item);
+}

sources/editor/UndoCommand/openelmtcommand.h

@@ -0,0 +1,43 @@
+/*
+	Copyright 2006-2022 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 OPENELMTCOMMAND_H
+#define OPENELMTCOMMAND_H
+
+#include <QUndoCommand>
+#include <QDomDocument>
+#include <QPointer>
+
+class ElementScene;
+class QGraphicsItem;
+
+class OpenElmtCommand : public QUndoCommand
+{
+	public:
+		OpenElmtCommand(const QDomDocument &document, QPointer<ElementScene> scene, QUndoCommand *parent = nullptr);
+
+		virtual void undo() override;
+		virtual void redo() override;
+
+	private:
+		QDomDocument m_document;
+		bool m_first_redo{true};
+		QPointer<ElementScene> m_scene;
+		QList<QGraphicsItem *> m_graphics_item;
+};
+
+#endif // OPENELMTCOMMAND_H

sources/editor/ui/qetelementeditor.cpp

@@ -47,6 +47,7 @@
 #include "../../newelementwizard.h"
 #include "../editorcommands.h"
 #include "../../dxf/dxftoelmt.h"
+#include "../UndoCommand/openelmtcommand.h"
 
 #include <QSettings>
 #include <QActionGroup>
@@ -1514,8 +1515,7 @@ void QETElementEditor::on_m_import_dxf_triggered()
 		QDomDocument xml_;
 		xml_.setContent(array_);
 
-		m_elmt_scene->fromXml(xml_);
-		fillPartsList();
+		m_elmt_scene->undoStack().push(new OpenElmtCommand(xml_, m_elmt_scene));
 	}
 }