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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 Rosegarden
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5 A MIDI and audio sequencer and musical notation editor.
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6 Copyright 2000-2010 the Rosegarden development team.
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7
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8 Other copyrights also apply to some parts of this work. Please
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9 see the AUTHORS file and individual file headers for details.
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10
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11 This program is free software; you can redistribute it and/or
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12 modify it under the terms of the GNU General Public License as
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13 published by the Free Software Foundation; either version 2 of the
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14 License, or (at your option) any later version. See the file
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15 COPYING included with this distribution for more information.
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16 */
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17
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18 #include "panned.h"
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19
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20 #include <QScrollBar>
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21 #include <QGLWidget>
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22
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23 #include <iostream>
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24
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25 Panned::Panned()
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26 {
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27 // setViewport(new QGLWidget(QGLFormat(QGL::SampleBuffers)));
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28 setRenderHints(QPainter::Antialiasing);
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29 }
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30
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31 void
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32 Panned::resizeEvent(QResizeEvent *ev)
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33 {
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34 QPointF near = mapToScene(0, 0);
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35 QPointF far = mapToScene(width(), height());
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36 QSizeF sz(far.x()-near.x(), far.y()-near.y());
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37 QRectF pr(near, sz);
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38
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39 if (pr != m_pannedRect) {
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40 m_pannedRect = pr;
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41 emit pannedRectChanged(pr);
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42 }
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43
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44 QGraphicsView::resizeEvent(ev);
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45 }
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46
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47 void
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48 Panned::paintEvent(QPaintEvent *e)
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49 {
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50 QGraphicsView::paintEvent(e);
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51 }
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52
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53 void
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54 Panned::drawForeground(QPainter *paint, const QRectF &)
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55 {
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56 QPointF near = mapToScene(0, 0);
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57 QPointF far = mapToScene(width(), height());
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58 QSizeF sz(far.x()-near.x(), far.y()-near.y());
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59 QRectF pr(near, sz);
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60
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61 if (pr != m_pannedRect) {
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62 if (pr.x() != m_pannedRect.x()) emit pannedContentsScrolled();
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63 m_pannedRect = pr;
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64 emit pannedRectChanged(pr);
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65 }
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66 }
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67
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68 void
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69 Panned::slotSetPannedRect(QRectF pr)
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70 {
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71 centerOn(pr.center());
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72 // setSceneRect(pr);
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73 // m_pannedRect = pr;
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74 }
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75
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76 void
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77 Panned::wheelEvent(QWheelEvent *ev)
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78 {
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79 emit wheelEventReceived(ev);
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80 QGraphicsView::wheelEvent(ev);
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81 }
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82
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83 void
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84 Panned::slotEmulateWheelEvent(QWheelEvent *ev)
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85 {
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86 QGraphicsView::wheelEvent(ev);
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87 }
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88
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89 void
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90 Panned::leaveEvent(QEvent *)
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91 {
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92 emit mouseLeaves();
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93 }
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