view src/panned.h @ 633:db62a0cb3037

* Added setting to specify that diff command should be run once for each selected file, rather than passing all file names to diff command (p4merge doesn't like being given many files)

/* -*- 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) 2012 Chris Cannam
    Copyright (c) 2012 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 _PANNED_H_
#define _PANNED_H_

#include <QGraphicsView>

class QWheelEvent;
class QEvent;
class QTimer;

class Panned : public QGraphicsView
{
    Q_OBJECT

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

    virtual void setScene(QGraphicsScene *s);

signals:
    void pannedRectChanged(QRectF);
    void wheelEventReceived(QWheelEvent *);
    void pannedContentsScrolled();
    void mouseLeaves();

public slots:
    void slotSetPannedRect(QRectF);
    void slotEmulateWheelEvent(QWheelEvent *ev);

    void zoomIn();
    void zoomOut();

private slots:
    void dragTimerTimeout();

protected:
    QRectF m_pannedRect;

    QPoint m_lastDragPos;
    QPoint m_lastDragStart;
    QPoint m_lastOrigin;
    QPointF m_velocity;
    bool m_dragging;
    int m_dragTimerMs;
    QTimer *m_dragTimer;

    enum DragDirection {
        UnknownDrag,
        HorizontalDrag,
        VerticalDrag,
        FreeDrag
    };
    DragDirection m_dragDirection;
    void updateDragDirection(QPoint);

    virtual void mousePressEvent(QMouseEvent *);
    virtual void mouseMoveEvent(QMouseEvent *);
    virtual void mouseReleaseEvent(QMouseEvent *);

    virtual void paintEvent(QPaintEvent *);
    virtual void resizeEvent(QResizeEvent *);
    virtual void drawForeground(QPainter *, const QRectF &);
    virtual void wheelEvent(QWheelEvent *);
    virtual void leaveEvent(QEvent *);
};

#endif