Add initial support of texts group

git-svn-id: svn+ssh://svn.tuxfamily.org/svnroot/qet/qet/trunk@5117 bfdf4180-ca20-0410-9c96-a3a8aa849046

sources/qetgraphicsitem/elementtextitemgroup.h

@@ -0,0 +1,73 @@
+/*
+	Copyright 2006-2017 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 ELEMENTTEXTITEMGROUP_H
+#define ELEMENTTEXTITEMGROUP_H
+
+#include <QGraphicsItemGroup>
+#include <QObject>
+#include <QDomElement>
+
+class Element;
+class DynamicElementTextItem;
+class Diagram;
+
+/**
+ * @brief The ElementTextItemGroup class
+ * This class represent a group of element text
+ * Texts in the group can be aligned left / center /right
+ */
+class ElementTextItemGroup : public QObject, public  QGraphicsItemGroup
+{
+	Q_OBJECT
+	
+	public:
+		ElementTextItemGroup(const QString &name, Element *parent);
+		~ElementTextItemGroup() override;
+		void addToGroup(QGraphicsItem *item);
+		void removeFromGroup(QGraphicsItem *item);
+		
+		void setAlignement(Qt::Alignment alignement);
+		Qt::Alignment alignment() const;
+		void updateAlignement();
+		void setName(QString name);
+		QString name() const {return m_name;}
+		QList<DynamicElementTextItem *> texts() const;
+		Diagram *diagram() const;
+		
+		QDomElement toXml(QDomDocument &dom_document) const;
+		void fromXml(QDomElement &dom_element);
+		static QString xmlTaggName() {return QString("text_group");}
+		
+		void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) override;
+		QRectF boundingRect() const override;
+		
+	protected:
+		void mousePressEvent(QGraphicsSceneMouseEvent *event) override;
+		void mouseMoveEvent(QGraphicsSceneMouseEvent *event) override;
+		void mouseReleaseEvent(QGraphicsSceneMouseEvent *event) override;
+		void keyPressEvent(QKeyEvent *event) override;
+
+	private:
+		Qt::Alignment m_alignement = Qt::AlignJustify;
+		QString m_name;
+		bool m_first_move = true;
+		QPointF m_mouse_to_origin_movement;
+		Element *m_element = nullptr;
+};
+
+#endif // ELEMENTTEXTITEMGROUP_H