Chris@57: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
cannam@45: 
cannam@45: /*
Chris@57:     EasyMercurial
Chris@57: 
Chris@57:     Based on HgExplorer by Jari Korhonen
Chris@57:     Copyright (c) 2010 Jari Korhonen
Chris@244:     Copyright (c) 2011 Chris Cannam
Chris@244:     Copyright (c) 2011 Queen Mary, University of London
Chris@57:     
cannam@45:     This program is free software; you can redistribute it and/or
cannam@45:     modify it under the terms of the GNU General Public License as
cannam@45:     published by the Free Software Foundation; either version 2 of the
cannam@45:     License, or (at your option) any later version.  See the file
cannam@45:     COPYING included with this distribution for more information.
cannam@45: */
cannam@45: 
Chris@57: #ifndef _PANNED_H_
Chris@57: #define _PANNED_H_
cannam@45: 
cannam@45: #include <QGraphicsView>
cannam@45: 
cannam@45: class QWheelEvent;
cannam@45: class QEvent;
Chris@168: class QTimer;
cannam@45: 
cannam@45: class Panned : public QGraphicsView
cannam@45: {
cannam@45:     Q_OBJECT
cannam@45: 
cannam@45: public:
cannam@45:     Panned();
cannam@45:     virtual ~Panned() { }
cannam@45: 
Chris@133:     virtual void setScene(QGraphicsScene *s);
Chris@133: 
cannam@45: signals:
cannam@45:     void pannedRectChanged(QRectF);
cannam@45:     void wheelEventReceived(QWheelEvent *);
cannam@45:     void pannedContentsScrolled();
cannam@45:     void mouseLeaves();
cannam@45: 
cannam@45: public slots:
cannam@45:     void slotSetPannedRect(QRectF);
cannam@45:     void slotEmulateWheelEvent(QWheelEvent *ev);
cannam@45: 
Chris@53:     void zoomIn();
Chris@53:     void zoomOut();
Chris@53: 
Chris@168: private slots:
Chris@168:     void dragTimerTimeout();
Chris@168: 
cannam@45: protected:
cannam@45:     QRectF m_pannedRect;
cannam@45: 
Chris@168:     QPoint m_lastDragPos;
Chris@168:     QPoint m_lastOrigin;
Chris@168:     QPointF m_velocity;
Chris@168:     bool m_dragging;
Chris@168:     int m_dragTimerMs;
Chris@168:     QTimer *m_dragTimer;
Chris@168: 
Chris@168:     virtual void mousePressEvent(QMouseEvent *);
Chris@168:     virtual void mouseMoveEvent(QMouseEvent *);
Chris@168:     virtual void mouseReleaseEvent(QMouseEvent *);
Chris@168: 
cannam@45:     virtual void paintEvent(QPaintEvent *);
cannam@45:     virtual void resizeEvent(QResizeEvent *);
cannam@45:     virtual void drawForeground(QPainter *, const QRectF &);
cannam@45:     virtual void wheelEvent(QWheelEvent *);
cannam@45:     virtual void leaveEvent(QEvent *);
cannam@45: };
cannam@45: 
cannam@45: #endif
cannam@45: