Element editor : improve code

Better use of signal partsAdded and partsRemoved

sources/editor/UndoCommand/addpartcommand.h

@@ -0,0 +1,50 @@
+/*
+	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 ADDPARTCOMMAND_H
+#define ADDPARTCOMMAND_H
+
+#include <QUndoCommand>
+#include <QPointer>
+
+class ElementScene;
+class QGraphicsItem;
+
+/**
+ * @brief The AddPartCommand class
+ * Undo command use to add a graphics part into an element scene.
+ */
+class AddPartCommand : public QUndoCommand
+{
+	public:
+		AddPartCommand(const QString &text, QPointer<ElementScene> scene, QGraphicsItem *part, QUndoCommand *parent = nullptr);
+		~AddPartCommand() override;
+
+	private:
+		AddPartCommand(const AddPartCommand &);
+
+	public:
+		void undo() override;
+		void redo() override;
+
+	private:
+		QPointer<ElementScene> m_scene;
+		QVector<QGraphicsItem *> m_part;
+		bool m_first_redo{true};
+};
+
+#endif // ADDPARTCOMMAND_H