view panner.h @ 262:a7843b03b4cf easyhg_v0.3.1

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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    EasyMercurial

    Based on HgExplorer by Jari Korhonen
    Copyright (c) 2010 Jari Korhonen
    Copyright (c) 2011 Chris Cannam
    Copyright (c) 2011 Queen Mary, University of London
    
    This program 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.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef _PANNER_H_
#define _PANNER_H_

#include <QGraphicsView>

class Panned;

class Panner : public QGraphicsView
{
    Q_OBJECT

public:
    Panner();
    virtual ~Panner() { }

    virtual void setScene(QGraphicsScene *);

    void connectToPanned(Panned *p);

signals:
    void pannedRectChanged(QRectF);
    void pannerChanged(QRectF);
    void zoomIn();
    void zoomOut();

public slots:
    void slotSetPannedRect(QRectF);

protected slots:
    void slotSceneRectChanged(const QRectF &);
    void slotSceneChanged(const QList<QRectF> &);

protected:
    QRectF m_pannedRect;

    void moveTo(QPoint);

    void fit(QRectF);

    virtual void paintEvent(QPaintEvent *);
    virtual void mousePressEvent(QMouseEvent *e);
    virtual void mouseMoveEvent(QMouseEvent *e);
    virtual void mouseReleaseEvent(QMouseEvent *e);
    virtual void mouseDoubleClickEvent(QMouseEvent *e);
    virtual void wheelEvent(QWheelEvent *e);

    virtual void resizeEvent(QResizeEvent *);

    virtual void updateScene(const QList<QRectF> &);
    virtual void drawItems(QPainter *, int, QGraphicsItem *[],
                           const QStyleOptionGraphicsItem []);

    bool m_clicked;
    QRectF m_clickedRect;
    QPoint m_clickedPoint;

    QPixmap m_cache;
};

#endif