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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 JH |
25 | #include <QtGui> |
26 | ||
27 | #include "popup.h" | |
28 | ||
29 | using namespace std; | |
30 | ||
31 | namespace pv { | |
32 | namespace widgets { | |
33 | ||
b6a2899a | 34 | const unsigned int Popup::ArrowLength = 10; |
6e3f046e | 35 | const unsigned int Popup::ArrowOverlap = 3; |
b6a2899a | 36 | const unsigned int Popup::MarginWidth = 6; |
6e3f046e JH |
37 | |
38 | Popup::Popup(QWidget *parent) : | |
39 | QWidget(parent, Qt::Popup | Qt::FramelessWindowHint), | |
40 | _point(), | |
41 | _pos(Left) | |
42 | { | |
43 | } | |
44 | ||
45 | const QPoint& Popup::point() const | |
46 | { | |
47 | return _point; | |
48 | } | |
49 | ||
50 | Popup::Position Popup::position() const | |
51 | { | |
52 | return _pos; | |
53 | } | |
54 | ||
55 | void Popup::set_position(const QPoint point, Position pos) | |
56 | { | |
57 | _point = point, _pos = pos; | |
58 | ||
59 | setContentsMargins( | |
60 | MarginWidth + ((pos == Right) ? ArrowLength : 0), | |
61 | MarginWidth + ((pos == Bottom) ? ArrowLength : 0), | |
62 | MarginWidth + ((pos == Left) ? ArrowLength : 0), | |
63 | MarginWidth + ((pos == Top) ? ArrowLength : 0)); | |
64 | ||
65 | } | |
66 | ||
092e2a0a JH |
67 | bool Popup::space_for_arrow() const |
68 | { | |
69 | // Check if there is room for the arrow | |
70 | switch (_pos) { | |
71 | case Right: | |
72 | if (_point.x() > x()) | |
73 | return false; | |
74 | return true; | |
75 | ||
76 | case Bottom: | |
77 | if (_point.y() > y()) | |
78 | return false; | |
79 | return true; | |
80 | ||
81 | case Left: | |
82 | if (_point.x() < (x() + width())) | |
83 | return false; | |
84 | return true; | |
85 | ||
86 | case Top: | |
87 | if (_point.y() < (y() + height())) | |
88 | return false; | |
89 | return true; | |
90 | } | |
91 | ||
92 | return true; | |
93 | } | |
94 | ||
6e3f046e JH |
95 | QPolygon Popup::arrow_polygon() const |
96 | { | |
97 | QPolygon poly; | |
98 | ||
99 | const QPoint p = mapFromGlobal(_point); | |
100 | const int l = ArrowLength + ArrowOverlap; | |
101 | ||
102 | switch (_pos) | |
103 | { | |
104 | case Right: | |
105 | poly << QPoint(p.x() + l, p.y() - l); | |
106 | break; | |
107 | ||
108 | case Bottom: | |
109 | poly << QPoint(p.x() - l, p.y() + l); | |
110 | break; | |
111 | ||
112 | case Left: | |
113 | case Top: | |
114 | poly << QPoint(p.x() - l, p.y() - l); | |
115 | break; | |
116 | } | |
117 | ||
118 | poly << p; | |
119 | ||
120 | switch (_pos) | |
121 | { | |
122 | case Right: | |
123 | case Bottom: | |
124 | poly << QPoint(p.x() + l, p.y() + l); | |
125 | break; | |
126 | ||
127 | case Left: | |
128 | poly << QPoint(p.x() - l, p.y() + l); | |
129 | break; | |
130 | ||
131 | case Top: | |
132 | poly << QPoint(p.x() + l, p.y() - l); | |
133 | break; | |
134 | } | |
135 | ||
136 | return poly; | |
137 | } | |
138 | ||
139 | QRegion Popup::arrow_region() const | |
140 | { | |
141 | return QRegion(arrow_polygon()); | |
142 | } | |
143 | ||
144 | QRect Popup::bubble_rect() const | |
145 | { | |
146 | return QRect( | |
147 | QPoint((_pos == Right) ? ArrowLength : 0, | |
148 | (_pos == Bottom) ? ArrowLength : 0), | |
149 | QSize(width() - ((_pos == Left || _pos == Right) ? | |
150 | ArrowLength : 0), | |
151 | height() - ((_pos == Top || _pos == Bottom) ? | |
152 | ArrowLength : 0))); | |
153 | } | |
154 | ||
155 | QRegion Popup::bubble_region() const | |
156 | { | |
157 | const QRect rect(bubble_rect()); | |
158 | ||
159 | const unsigned int r = MarginWidth; | |
160 | const unsigned int d = 2 * r; | |
161 | return QRegion(rect.adjusted(r, 0, -r, 0)).united( | |
162 | QRegion(rect.adjusted(0, r, 0, -r))).united( | |
163 | QRegion(rect.left(), rect.top(), d, d, | |
164 | QRegion::Ellipse)).united( | |
165 | QRegion(rect.right() - d, rect.top(), d, d, | |
166 | QRegion::Ellipse)).united( | |
167 | QRegion(rect.left(), rect.bottom() - d, d, d, | |
168 | QRegion::Ellipse)).united( | |
169 | QRegion(rect.right() - d, rect.bottom() - d, d, d, | |
170 | QRegion::Ellipse)); | |
171 | } | |
172 | ||
173 | QRegion Popup::popup_region() const | |
174 | { | |
092e2a0a JH |
175 | if (space_for_arrow()) |
176 | return arrow_region().united(bubble_region()); | |
177 | else | |
178 | return bubble_region(); | |
6e3f046e JH |
179 | } |
180 | ||
181 | void Popup::reposition_widget() | |
182 | { | |
183 | QPoint o; | |
184 | ||
092e2a0a JH |
185 | const QRect screen_rect = QApplication::desktop()->availableGeometry( |
186 | QApplication::desktop()->screenNumber(_point)); | |
187 | ||
6e3f046e JH |
188 | if (_pos == Right || _pos == Left) |
189 | o.ry() = -height() / 2; | |
190 | else | |
191 | o.rx() = -width() / 2; | |
192 | ||
193 | if (_pos == Left) | |
194 | o.rx() = -width(); | |
195 | else if(_pos == Top) | |
196 | o.ry() = -height(); | |
197 | ||
092e2a0a JH |
198 | o += _point; |
199 | move(max(min(o.x(), screen_rect.right() - width()), | |
200 | screen_rect.left()), | |
201 | max(min(o.y(), screen_rect.bottom() - height()), | |
202 | screen_rect.top())); | |
6e3f046e JH |
203 | } |
204 | ||
0bce8609 JH |
205 | void Popup::closeEvent(QCloseEvent*) |
206 | { | |
207 | closed(); | |
208 | } | |
209 | ||
6e3f046e JH |
210 | void Popup::paintEvent(QPaintEvent*) |
211 | { | |
212 | QPainter painter(this); | |
213 | painter.setRenderHint(QPainter::Antialiasing); | |
214 | ||
215 | const QColor outline_color(QApplication::palette().color( | |
216 | QPalette::Dark)); | |
217 | ||
092e2a0a | 218 | // Draw the bubble |
6e3f046e JH |
219 | const QRegion b = bubble_region(); |
220 | const QRegion bubble_outline = QRegion(rect()).subtracted( | |
221 | b.translated(1, 0).intersected(b.translated(0, 1).intersected( | |
222 | b.translated(-1, 0).intersected(b.translated(0, -1))))); | |
223 | ||
224 | painter.setPen(Qt::NoPen); | |
225 | painter.setBrush(QApplication::palette().brush(QPalette::Window)); | |
226 | painter.drawRect(rect()); | |
227 | ||
092e2a0a JH |
228 | // Draw the arrow |
229 | if (!space_for_arrow()) | |
230 | return; | |
231 | ||
6e3f046e JH |
232 | const QPoint ArrowOffsets[] = { |
233 | QPoint(1, 0), QPoint(0, -1), QPoint(-1, 0), QPoint(0, 1)}; | |
234 | ||
235 | const QRegion a(arrow_region()); | |
236 | const QRegion arrow_outline = a.subtracted( | |
237 | a.translated(ArrowOffsets[_pos])); | |
238 | ||
239 | painter.setClipRegion(bubble_outline.subtracted(a).united( | |
240 | arrow_outline)); | |
241 | painter.setBrush(outline_color); | |
242 | painter.drawRect(rect()); | |
243 | } | |
244 | ||
245 | void Popup::resizeEvent(QResizeEvent*) | |
246 | { | |
247 | reposition_widget(); | |
248 | setMask(popup_region()); | |
249 | } | |
250 | ||
6e3f046e JH |
251 | void Popup::mouseReleaseEvent(QMouseEvent *e) |
252 | { | |
253 | assert(e); | |
254 | ||
255 | // We need our own out-of-bounds click handler because QWidget counts | |
256 | // the drop-shadow region as inside the widget | |
257 | if(!bubble_rect().contains(e->pos())) | |
258 | close(); | |
259 | } | |
260 | ||
b7b659aa JH |
261 | void Popup::showEvent(QShowEvent*) |
262 | { | |
263 | reposition_widget(); | |
264 | } | |
265 | ||
6e3f046e JH |
266 | } // namespace widgets |
267 | } // namespace pv | |
268 |