elementtextsmover.h

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/*
    Copyright 2006-2012 Xavier Guerrin
    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 ELEMENT_TEXTS_MOVER_H
#define ELEMENT_TEXTS_MOVER_H

#include <QSet>
#include <QPointF>

class QGraphicsItem;
class DiagramTextItem;
class Diagram;
class QGraphicsItemGroup;
class QGraphicsSceneMouseEvent;

class ElementTextsMover
{
    public:
        ElementTextsMover();
    private:
        ElementTextsMover(const ElementTextsMover &);
    
    public:
        bool isReady() const;
        int  beginMovement(Diagram *diagram, QGraphicsItem *driver_item = nullptr);
        void continueMovement(QGraphicsSceneMouseEvent *event);
        void endMovement();
        
    private:
        QString undoText() const;
    
    private:
        bool m_movement_running = false;
        Diagram *m_diagram = nullptr;
        QGraphicsItem *m_movement_driver = nullptr;
        QHash <DiagramTextItem *, QPointF> m_texts_hash;
        QHash <QGraphicsItemGroup *, QPointF> m_grps_hash;
        QHash <QGraphicsItem *, QPointF> m_items_hash;
        int m_text_count = 0,
            m_group_count = 0;
};
#endif