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6e3f046e JH |
1 | /* |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2013 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #include <algorithm> | |
22 | ||
b213ef09 JH |
23 | #include <assert.h> |
24 | ||
6e3f046e | 25 | #include <QtGui> |
d528d3d1 MC |
26 | #include <QApplication> |
27 | #include <QDesktopWidget> | |
0715fb8c | 28 | #include <QLineEdit> |
6e3f046e JH |
29 | |
30 | #include "popup.h" | |
31 | ||
819f4c25 JH |
32 | using std::max; |
33 | using std::min; | |
6e3f046e JH |
34 | |
35 | namespace pv { | |
36 | namespace widgets { | |
37 | ||
b6a2899a | 38 | const unsigned int Popup::ArrowLength = 10; |
6e3f046e | 39 | const unsigned int Popup::ArrowOverlap = 3; |
b6a2899a | 40 | const unsigned int Popup::MarginWidth = 6; |
6e3f046e JH |
41 | |
42 | Popup::Popup(QWidget *parent) : | |
43 | QWidget(parent, Qt::Popup | Qt::FramelessWindowHint), | |
44 | _point(), | |
45 | _pos(Left) | |
46 | { | |
47 | } | |
48 | ||
49 | const QPoint& Popup::point() const | |
50 | { | |
51 | return _point; | |
52 | } | |
53 | ||
54 | Popup::Position Popup::position() const | |
55 | { | |
56 | return _pos; | |
57 | } | |
58 | ||
59 | void Popup::set_position(const QPoint point, Position pos) | |
60 | { | |
61 | _point = point, _pos = pos; | |
62 | ||
63 | setContentsMargins( | |
64 | MarginWidth + ((pos == Right) ? ArrowLength : 0), | |
65 | MarginWidth + ((pos == Bottom) ? ArrowLength : 0), | |
66 | MarginWidth + ((pos == Left) ? ArrowLength : 0), | |
67 | MarginWidth + ((pos == Top) ? ArrowLength : 0)); | |
68 | ||
69 | } | |
70 | ||
0715fb8c SA |
71 | bool Popup::eventFilter(QObject *obj, QEvent *evt) |
72 | { | |
73 | QKeyEvent *keyEvent; | |
74 | ||
75 | (void)obj; | |
76 | ||
77 | if (evt->type() == QEvent::KeyPress) { | |
78 | keyEvent = static_cast<QKeyEvent*>(evt); | |
79 | if (keyEvent->key() == Qt::Key_Enter || | |
80 | keyEvent->key() == Qt::Key_Return) { | |
81 | this->close(); | |
82 | return true; | |
83 | } | |
84 | } | |
85 | ||
86 | return false; | |
87 | } | |
88 | ||
89 | void Popup::show() | |
90 | { | |
91 | QLineEdit* le; | |
92 | ||
93 | QWidget::show(); | |
94 | ||
95 | // We want to close the popup when the Enter key was | |
96 | // pressed and the first editable widget had focus. | |
97 | if ((le = this->findChild<QLineEdit*>())) { | |
98 | ||
99 | // For combo boxes we need to hook into the parent of | |
100 | // the line edit (i.e. the QComboBox). For edit boxes | |
101 | // we hook into the widget directly. | |
102 | if (le->parent()->metaObject()->className() == | |
103 | this->metaObject()->className()) | |
104 | le->installEventFilter(this); | |
105 | else | |
106 | le->parent()->installEventFilter(this); | |
107 | } | |
108 | } | |
109 | ||
092e2a0a JH |
110 | bool Popup::space_for_arrow() const |
111 | { | |
112 | // Check if there is room for the arrow | |
113 | switch (_pos) { | |
114 | case Right: | |
115 | if (_point.x() > x()) | |
116 | return false; | |
117 | return true; | |
118 | ||
119 | case Bottom: | |
120 | if (_point.y() > y()) | |
121 | return false; | |
122 | return true; | |
123 | ||
124 | case Left: | |
125 | if (_point.x() < (x() + width())) | |
126 | return false; | |
127 | return true; | |
128 | ||
129 | case Top: | |
130 | if (_point.y() < (y() + height())) | |
131 | return false; | |
132 | return true; | |
133 | } | |
134 | ||
135 | return true; | |
136 | } | |
137 | ||
6e3f046e JH |
138 | QPolygon Popup::arrow_polygon() const |
139 | { | |
140 | QPolygon poly; | |
141 | ||
142 | const QPoint p = mapFromGlobal(_point); | |
143 | const int l = ArrowLength + ArrowOverlap; | |
144 | ||
145 | switch (_pos) | |
146 | { | |
147 | case Right: | |
148 | poly << QPoint(p.x() + l, p.y() - l); | |
149 | break; | |
150 | ||
151 | case Bottom: | |
152 | poly << QPoint(p.x() - l, p.y() + l); | |
153 | break; | |
154 | ||
155 | case Left: | |
156 | case Top: | |
157 | poly << QPoint(p.x() - l, p.y() - l); | |
158 | break; | |
159 | } | |
160 | ||
161 | poly << p; | |
162 | ||
163 | switch (_pos) | |
164 | { | |
165 | case Right: | |
166 | case Bottom: | |
167 | poly << QPoint(p.x() + l, p.y() + l); | |
168 | break; | |
169 | ||
170 | case Left: | |
171 | poly << QPoint(p.x() - l, p.y() + l); | |
172 | break; | |
173 | ||
174 | case Top: | |
175 | poly << QPoint(p.x() + l, p.y() - l); | |
176 | break; | |
177 | } | |
178 | ||
179 | return poly; | |
180 | } | |
181 | ||
182 | QRegion Popup::arrow_region() const | |
183 | { | |
184 | return QRegion(arrow_polygon()); | |
185 | } | |
186 | ||
187 | QRect Popup::bubble_rect() const | |
188 | { | |
189 | return QRect( | |
190 | QPoint((_pos == Right) ? ArrowLength : 0, | |
191 | (_pos == Bottom) ? ArrowLength : 0), | |
192 | QSize(width() - ((_pos == Left || _pos == Right) ? | |
193 | ArrowLength : 0), | |
194 | height() - ((_pos == Top || _pos == Bottom) ? | |
195 | ArrowLength : 0))); | |
196 | } | |
197 | ||
198 | QRegion Popup::bubble_region() const | |
199 | { | |
200 | const QRect rect(bubble_rect()); | |
201 | ||
202 | const unsigned int r = MarginWidth; | |
203 | const unsigned int d = 2 * r; | |
204 | return QRegion(rect.adjusted(r, 0, -r, 0)).united( | |
205 | QRegion(rect.adjusted(0, r, 0, -r))).united( | |
206 | QRegion(rect.left(), rect.top(), d, d, | |
207 | QRegion::Ellipse)).united( | |
208 | QRegion(rect.right() - d, rect.top(), d, d, | |
209 | QRegion::Ellipse)).united( | |
210 | QRegion(rect.left(), rect.bottom() - d, d, d, | |
211 | QRegion::Ellipse)).united( | |
212 | QRegion(rect.right() - d, rect.bottom() - d, d, d, | |
213 | QRegion::Ellipse)); | |
214 | } | |
215 | ||
216 | QRegion Popup::popup_region() const | |
217 | { | |
092e2a0a JH |
218 | if (space_for_arrow()) |
219 | return arrow_region().united(bubble_region()); | |
220 | else | |
221 | return bubble_region(); | |
6e3f046e JH |
222 | } |
223 | ||
224 | void Popup::reposition_widget() | |
225 | { | |
226 | QPoint o; | |
227 | ||
092e2a0a JH |
228 | const QRect screen_rect = QApplication::desktop()->availableGeometry( |
229 | QApplication::desktop()->screenNumber(_point)); | |
230 | ||
6e3f046e JH |
231 | if (_pos == Right || _pos == Left) |
232 | o.ry() = -height() / 2; | |
233 | else | |
234 | o.rx() = -width() / 2; | |
235 | ||
236 | if (_pos == Left) | |
237 | o.rx() = -width(); | |
238 | else if(_pos == Top) | |
239 | o.ry() = -height(); | |
240 | ||
092e2a0a JH |
241 | o += _point; |
242 | move(max(min(o.x(), screen_rect.right() - width()), | |
243 | screen_rect.left()), | |
244 | max(min(o.y(), screen_rect.bottom() - height()), | |
245 | screen_rect.top())); | |
6e3f046e JH |
246 | } |
247 | ||
0bce8609 JH |
248 | void Popup::closeEvent(QCloseEvent*) |
249 | { | |
250 | closed(); | |
251 | } | |
252 | ||
6e3f046e JH |
253 | void Popup::paintEvent(QPaintEvent*) |
254 | { | |
255 | QPainter painter(this); | |
256 | painter.setRenderHint(QPainter::Antialiasing); | |
257 | ||
258 | const QColor outline_color(QApplication::palette().color( | |
259 | QPalette::Dark)); | |
260 | ||
092e2a0a | 261 | // Draw the bubble |
6e3f046e JH |
262 | const QRegion b = bubble_region(); |
263 | const QRegion bubble_outline = QRegion(rect()).subtracted( | |
264 | b.translated(1, 0).intersected(b.translated(0, 1).intersected( | |
265 | b.translated(-1, 0).intersected(b.translated(0, -1))))); | |
266 | ||
267 | painter.setPen(Qt::NoPen); | |
268 | painter.setBrush(QApplication::palette().brush(QPalette::Window)); | |
269 | painter.drawRect(rect()); | |
270 | ||
092e2a0a JH |
271 | // Draw the arrow |
272 | if (!space_for_arrow()) | |
273 | return; | |
274 | ||
6e3f046e JH |
275 | const QPoint ArrowOffsets[] = { |
276 | QPoint(1, 0), QPoint(0, -1), QPoint(-1, 0), QPoint(0, 1)}; | |
277 | ||
278 | const QRegion a(arrow_region()); | |
279 | const QRegion arrow_outline = a.subtracted( | |
280 | a.translated(ArrowOffsets[_pos])); | |
281 | ||
282 | painter.setClipRegion(bubble_outline.subtracted(a).united( | |
283 | arrow_outline)); | |
284 | painter.setBrush(outline_color); | |
285 | painter.drawRect(rect()); | |
286 | } | |
287 | ||
288 | void Popup::resizeEvent(QResizeEvent*) | |
289 | { | |
290 | reposition_widget(); | |
291 | setMask(popup_region()); | |
292 | } | |
293 | ||
6e3f046e JH |
294 | void Popup::mouseReleaseEvent(QMouseEvent *e) |
295 | { | |
296 | assert(e); | |
297 | ||
298 | // We need our own out-of-bounds click handler because QWidget counts | |
299 | // the drop-shadow region as inside the widget | |
300 | if(!bubble_rect().contains(e->pos())) | |
301 | close(); | |
302 | } | |
303 | ||
b7b659aa JH |
304 | void Popup::showEvent(QShowEvent*) |
305 | { | |
306 | reposition_widget(); | |
307 | } | |
308 | ||
6e3f046e JH |
309 | } // namespace widgets |
310 | } // namespace pv | |
311 |