Chris@57
|
1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
|
cannam@45
|
2
|
cannam@45
|
3 /*
|
Chris@57
|
4 EasyMercurial
|
Chris@57
|
5
|
Chris@57
|
6 Based on HgExplorer by Jari Korhonen
|
Chris@57
|
7 Copyright (c) 2010 Jari Korhonen
|
Chris@57
|
8 Copyright (c) 2010 Chris Cannam
|
Chris@57
|
9 Copyright (c) 2010 Queen Mary, University of London
|
Chris@57
|
10
|
cannam@45
|
11 This program is free software; you can redistribute it and/or
|
cannam@45
|
12 modify it under the terms of the GNU General Public License as
|
cannam@45
|
13 published by the Free Software Foundation; either version 2 of the
|
cannam@45
|
14 License, or (at your option) any later version. See the file
|
cannam@45
|
15 COPYING included with this distribution for more information.
|
cannam@45
|
16 */
|
cannam@45
|
17
|
cannam@45
|
18 #include "panner.h"
|
cannam@45
|
19 #include "panned.h"
|
Chris@113
|
20 #include "debug.h"
|
cannam@45
|
21
|
cannam@45
|
22 #include <QPolygon>
|
cannam@45
|
23 #include <QMouseEvent>
|
cannam@45
|
24 #include <QColor>
|
cannam@45
|
25
|
cannam@45
|
26 #include <iostream>
|
cannam@45
|
27
|
cannam@45
|
28 class PannerScene : public QGraphicsScene
|
cannam@45
|
29 {
|
cannam@45
|
30 public:
|
cannam@45
|
31 friend class Panner;
|
cannam@45
|
32 };
|
cannam@45
|
33
|
cannam@45
|
34 Panner::Panner() :
|
cannam@45
|
35 m_clicked(false)
|
cannam@45
|
36 {
|
cannam@45
|
37 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
|
cannam@45
|
38 setVerticalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
|
Chris@48
|
39 setOptimizationFlags(QGraphicsView::DontSavePainterState |
|
Chris@48
|
40 QGraphicsView::IndirectPainting);
|
cannam@45
|
41 setMouseTracking(true);
|
cannam@45
|
42 setInteractive(false);
|
cannam@45
|
43 }
|
cannam@45
|
44
|
cannam@45
|
45 void
|
Chris@113
|
46 Panner::fit(QRectF r)
|
Chris@113
|
47 {
|
Chris@113
|
48 Qt::AspectRatioMode m = Qt::IgnoreAspectRatio;
|
Chris@113
|
49 if (height() > width()) {
|
Chris@113
|
50 // Our panner is vertical; if the source is not tall,
|
Chris@113
|
51 // don't stretch it to fit in the height, it'd look weird
|
Chris@113
|
52 if (r.height() < height() * 2) {
|
Chris@113
|
53 m = Qt::KeepAspectRatio;
|
Chris@113
|
54 }
|
Chris@113
|
55 } else {
|
Chris@113
|
56 // Similarly, but horizontal
|
Chris@113
|
57 if (r.width() < width() * 2) {
|
Chris@113
|
58 m = Qt::KeepAspectRatio;
|
Chris@113
|
59 }
|
Chris@113
|
60 }
|
Chris@113
|
61 DEBUG << "Panner: fit mode " << m << endl;
|
Chris@113
|
62 fitInView(r, m);
|
Chris@113
|
63 }
|
Chris@113
|
64
|
Chris@113
|
65 void
|
cannam@45
|
66 Panner::setScene(QGraphicsScene *s)
|
cannam@45
|
67 {
|
cannam@45
|
68 if (scene()) {
|
cannam@45
|
69 disconnect(scene(), SIGNAL(sceneRectChanged(const QRectF &)),
|
cannam@45
|
70 this, SLOT(slotSceneRectChanged(const QRectF &)));
|
cannam@45
|
71 }
|
cannam@45
|
72 QGraphicsView::setScene(s);
|
Chris@113
|
73 if (scene()) {
|
Chris@113
|
74 QRectF r = sceneRect();
|
Chris@113
|
75 DEBUG << "scene rect: " << r << ", my rect " << rect() << endl;
|
Chris@113
|
76 fit(r);
|
Chris@113
|
77 }
|
cannam@45
|
78 m_cache = QPixmap();
|
cannam@45
|
79 connect(scene(), SIGNAL(sceneRectChanged(const QRectF &)),
|
cannam@45
|
80 this, SLOT(slotSceneRectChanged(const QRectF &)));
|
cannam@45
|
81 }
|
cannam@45
|
82
|
cannam@45
|
83 void
|
cannam@45
|
84 Panner::connectToPanned(Panned *p)
|
cannam@45
|
85 {
|
cannam@45
|
86 connect(p, SIGNAL(pannedRectChanged(QRectF)),
|
cannam@45
|
87 this, SLOT(slotSetPannedRect(QRectF)));
|
cannam@45
|
88
|
cannam@45
|
89 connect(this, SIGNAL(pannedRectChanged(QRectF)),
|
cannam@45
|
90 p, SLOT(slotSetPannedRect(QRectF)));
|
Chris@53
|
91
|
Chris@53
|
92 connect(this, SIGNAL(zoomIn()),
|
Chris@53
|
93 p, SLOT(zoomIn()));
|
Chris@53
|
94
|
Chris@53
|
95 connect(this, SIGNAL(zoomOut()),
|
Chris@53
|
96 p, SLOT(zoomOut()));
|
cannam@45
|
97 }
|
cannam@45
|
98
|
cannam@45
|
99 void
|
cannam@45
|
100 Panner::slotSetPannedRect(QRectF rect)
|
cannam@45
|
101 {
|
cannam@45
|
102 m_pannedRect = rect;
|
cannam@45
|
103 viewport()->update();
|
cannam@45
|
104 }
|
cannam@45
|
105
|
cannam@45
|
106 void
|
cannam@45
|
107 Panner::resizeEvent(QResizeEvent *)
|
cannam@45
|
108 {
|
Chris@113
|
109 if (scene()) fit(sceneRect());
|
cannam@45
|
110 m_cache = QPixmap();
|
cannam@45
|
111 }
|
cannam@45
|
112
|
cannam@45
|
113 void
|
cannam@45
|
114 Panner::slotSceneRectChanged(const QRectF &newRect)
|
cannam@45
|
115 {
|
cannam@45
|
116 if (!scene()) return; // spurious
|
Chris@113
|
117 fit(newRect);
|
cannam@45
|
118 m_cache = QPixmap();
|
cannam@45
|
119 viewport()->update();
|
cannam@45
|
120 }
|
cannam@45
|
121
|
cannam@45
|
122 void
|
cannam@45
|
123 Panner::paintEvent(QPaintEvent *e)
|
cannam@45
|
124 {
|
cannam@45
|
125 QPaintEvent *e2 = new QPaintEvent(e->region().boundingRect());
|
cannam@45
|
126 QGraphicsView::paintEvent(e2);
|
cannam@45
|
127
|
cannam@45
|
128 QPainter paint;
|
cannam@45
|
129 paint.begin(viewport());
|
cannam@45
|
130 paint.setClipRegion(e->region());
|
cannam@45
|
131
|
cannam@45
|
132 QPainterPath path;
|
cannam@45
|
133 path.addRect(rect());
|
cannam@45
|
134 path.addPolygon(mapFromScene(m_pannedRect));
|
cannam@45
|
135
|
cannam@45
|
136 QColor c(QColor::fromHsv(211, 194, 238));
|
cannam@45
|
137 c.setAlpha(80);
|
cannam@45
|
138 paint.setPen(Qt::NoPen);
|
cannam@45
|
139 paint.setBrush(c);
|
cannam@45
|
140 paint.drawPath(path);
|
cannam@45
|
141
|
cannam@45
|
142 paint.setBrush(Qt::NoBrush);
|
cannam@45
|
143 paint.setPen(QPen(QColor::fromHsv(211, 194, 238), 0));
|
cannam@45
|
144 paint.drawConvexPolygon(mapFromScene(m_pannedRect));
|
cannam@45
|
145
|
cannam@45
|
146 paint.end();
|
cannam@45
|
147
|
cannam@45
|
148 emit pannerChanged(m_pannedRect);
|
cannam@45
|
149 }
|
cannam@45
|
150
|
cannam@45
|
151 void
|
cannam@45
|
152 Panner::updateScene(const QList<QRectF> &rects)
|
cannam@45
|
153 {
|
cannam@45
|
154 if (!m_cache.isNull()) m_cache = QPixmap();
|
cannam@45
|
155 QGraphicsView::updateScene(rects);
|
cannam@45
|
156 }
|
cannam@45
|
157
|
cannam@45
|
158 void
|
cannam@45
|
159 Panner::drawItems(QPainter *painter, int numItems,
|
cannam@45
|
160 QGraphicsItem *items[],
|
cannam@45
|
161 const QStyleOptionGraphicsItem options[])
|
cannam@45
|
162 {
|
cannam@45
|
163 if (m_cache.size() != viewport()->size()) {
|
cannam@45
|
164
|
Chris@113
|
165 DEBUG << "Panner: recreating cache" << endl;
|
Chris@48
|
166
|
cannam@45
|
167 QGraphicsScene *s = scene();
|
cannam@45
|
168 if (!s) return;
|
cannam@45
|
169 PannerScene *ps = static_cast<PannerScene *>(s);
|
cannam@45
|
170
|
cannam@45
|
171 m_cache = QPixmap(viewport()->size());
|
cannam@45
|
172 m_cache.fill(Qt::transparent);
|
cannam@45
|
173 QPainter cachePainter;
|
cannam@45
|
174 cachePainter.begin(&m_cache);
|
cannam@45
|
175 cachePainter.setTransform(viewportTransform());
|
cannam@45
|
176 ps->drawItems(&cachePainter, numItems, items, options);
|
cannam@45
|
177 cachePainter.end();
|
cannam@45
|
178 }
|
cannam@45
|
179
|
cannam@45
|
180 painter->save();
|
cannam@45
|
181 painter->setTransform(QTransform());
|
cannam@45
|
182 painter->drawPixmap(0, 0, m_cache);
|
cannam@45
|
183 painter->restore();
|
cannam@45
|
184 }
|
cannam@45
|
185
|
cannam@45
|
186 void
|
cannam@45
|
187 Panner::mousePressEvent(QMouseEvent *e)
|
cannam@45
|
188 {
|
cannam@45
|
189 if (e->button() != Qt::LeftButton) {
|
cannam@45
|
190 QGraphicsView::mouseDoubleClickEvent(e);
|
cannam@45
|
191 return;
|
cannam@45
|
192 }
|
cannam@45
|
193 m_clicked = true;
|
cannam@45
|
194 m_clickedRect = m_pannedRect;
|
cannam@45
|
195 m_clickedPoint = e->pos();
|
cannam@45
|
196 }
|
cannam@45
|
197
|
cannam@45
|
198 void
|
cannam@45
|
199 Panner::mouseDoubleClickEvent(QMouseEvent *e)
|
cannam@45
|
200 {
|
cannam@45
|
201 if (e->button() != Qt::LeftButton) {
|
cannam@45
|
202 QGraphicsView::mouseDoubleClickEvent(e);
|
cannam@45
|
203 return;
|
cannam@45
|
204 }
|
cannam@45
|
205
|
cannam@45
|
206 moveTo(e->pos());
|
cannam@45
|
207 }
|
cannam@45
|
208
|
cannam@45
|
209 void
|
cannam@45
|
210 Panner::mouseMoveEvent(QMouseEvent *e)
|
cannam@45
|
211 {
|
cannam@45
|
212 if (!m_clicked) return;
|
cannam@45
|
213 QPointF cp = mapToScene(m_clickedPoint);
|
cannam@45
|
214 QPointF mp = mapToScene(e->pos());
|
cannam@45
|
215 QPointF delta = mp - cp;
|
cannam@45
|
216 QRectF nr = m_clickedRect;
|
cannam@45
|
217 nr.translate(delta);
|
cannam@45
|
218 slotSetPannedRect(nr);
|
cannam@45
|
219 emit pannedRectChanged(m_pannedRect);
|
cannam@45
|
220 viewport()->update();
|
cannam@45
|
221 }
|
cannam@45
|
222
|
cannam@45
|
223 void
|
cannam@45
|
224 Panner::mouseReleaseEvent(QMouseEvent *e)
|
cannam@45
|
225 {
|
cannam@45
|
226 if (e->button() != Qt::LeftButton) {
|
cannam@45
|
227 QGraphicsView::mouseDoubleClickEvent(e);
|
cannam@45
|
228 return;
|
cannam@45
|
229 }
|
cannam@45
|
230
|
cannam@45
|
231 if (m_clicked) {
|
cannam@45
|
232 mouseMoveEvent(e);
|
cannam@45
|
233 }
|
cannam@45
|
234
|
cannam@45
|
235 m_clicked = false;
|
cannam@45
|
236 viewport()->update();
|
cannam@45
|
237 }
|
cannam@45
|
238
|
cannam@45
|
239 void
|
cannam@45
|
240 Panner::wheelEvent(QWheelEvent *e)
|
cannam@45
|
241 {
|
Chris@53
|
242 int d = e->delta();
|
Chris@53
|
243 if (d > 0) {
|
Chris@53
|
244 while (d > 0) {
|
Chris@53
|
245 emit zoomOut();
|
Chris@53
|
246 d -= 120;
|
Chris@53
|
247 }
|
cannam@45
|
248 } else {
|
Chris@53
|
249 while (d < 0) {
|
Chris@53
|
250 emit zoomIn();
|
Chris@53
|
251 d += 120;
|
Chris@53
|
252 }
|
cannam@45
|
253 }
|
cannam@45
|
254 }
|
cannam@45
|
255
|
cannam@45
|
256 void
|
cannam@45
|
257 Panner::moveTo(QPoint p)
|
cannam@45
|
258 {
|
cannam@45
|
259 QPointF sp = mapToScene(p);
|
cannam@45
|
260 QRectF nr = m_pannedRect;
|
cannam@45
|
261 double d = sp.x() - nr.center().x();
|
cannam@45
|
262 nr.translate(d, 0);
|
cannam@45
|
263 slotSetPannedRect(nr);
|
cannam@45
|
264 emit pannedRectChanged(m_pannedRect);
|
cannam@45
|
265 viewport()->update();
|
cannam@45
|
266 }
|
cannam@45
|
267
|