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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 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 <assert.h> | |
22 | #include <limits.h> | |
23 | #include <math.h> | |
24 | ||
25 | #include <boost/foreach.hpp> | |
26 | ||
27 | #include <QEvent> | |
28 | #include <QMouseEvent> | |
29 | #include <QScrollBar> | |
30 | ||
31 | #include "header.h" | |
32 | #include "ruler.h" | |
33 | #include "view.h" | |
34 | #include "viewport.h" | |
35 | ||
36 | #include "../logicdata.h" | |
37 | #include "../logicdatasnapshot.h" | |
38 | #include "../sigsession.h" | |
39 | ||
40 | using namespace boost; | |
41 | using namespace std; | |
42 | ||
43 | namespace pv { | |
44 | namespace view { | |
45 | ||
46 | const double View::MaxScale = 1e9; | |
47 | const double View::MinScale = 1e-15; | |
48 | ||
49 | const int View::LabelMarginWidth = 70; | |
50 | const int View::RulerHeight = 30; | |
51 | ||
52 | const int View::MaxScrollValue = INT_MAX / 2; | |
53 | ||
54 | const int View::SignalHeight = 50; | |
55 | ||
56 | const QColor View::CursorAreaColour(220, 231, 243); | |
57 | ||
58 | const QSizeF View::LabelPadding(4, 0); | |
59 | ||
60 | View::View(SigSession &session, QWidget *parent) : | |
61 | QAbstractScrollArea(parent), | |
62 | _session(session), | |
63 | _viewport(new Viewport(*this)), | |
64 | _ruler(new Ruler(*this)), | |
65 | _header(new Header(*this)), | |
66 | _data_length(0), | |
67 | _scale(1e-6), | |
68 | _offset(0), | |
69 | _v_offset(0), | |
70 | _show_cursors(false), | |
71 | _cursors(pair<Cursor, Cursor>(Cursor(*this, 0.0), | |
72 | Cursor(*this, 1.0))), | |
73 | _hover_point(-1, -1) | |
74 | { | |
75 | connect(horizontalScrollBar(), SIGNAL(valueChanged(int)), | |
76 | this, SLOT(h_scroll_value_changed(int))); | |
77 | connect(verticalScrollBar(), SIGNAL(valueChanged(int)), | |
78 | this, SLOT(v_scroll_value_changed(int))); | |
79 | connect(&_session, SIGNAL(data_updated()), | |
80 | this, SLOT(data_updated())); | |
81 | ||
82 | connect(&_cursors.first, SIGNAL(time_changed()), | |
83 | this, SLOT(marker_time_changed())); | |
84 | connect(&_cursors.second, SIGNAL(time_changed()), | |
85 | this, SLOT(marker_time_changed())); | |
86 | ||
87 | setViewportMargins(LabelMarginWidth, RulerHeight, 0, 0); | |
88 | setViewport(_viewport); | |
89 | ||
90 | _viewport->installEventFilter(this); | |
91 | _ruler->installEventFilter(this); | |
92 | _header->installEventFilter(this); | |
93 | } | |
94 | ||
95 | SigSession& View::session() | |
96 | { | |
97 | return _session; | |
98 | } | |
99 | ||
100 | double View::scale() const | |
101 | { | |
102 | return _scale; | |
103 | } | |
104 | ||
105 | double View::offset() const | |
106 | { | |
107 | return _offset; | |
108 | } | |
109 | ||
110 | int View::v_offset() const | |
111 | { | |
112 | return _v_offset; | |
113 | } | |
114 | ||
115 | void View::zoom(double steps) | |
116 | { | |
117 | zoom(steps, (width() - LabelMarginWidth) / 2); | |
118 | } | |
119 | ||
120 | void View::zoom(double steps, int offset) | |
121 | { | |
122 | const double cursor_offset = _offset + _scale * offset; | |
123 | _scale *= pow(3.0/2.0, -steps); | |
124 | _scale = max(min(_scale, MaxScale), MinScale); | |
125 | _offset = cursor_offset - _scale * offset; | |
126 | ||
127 | _ruler->update(); | |
128 | _viewport->update(); | |
129 | update_scroll(); | |
130 | } | |
131 | ||
132 | ||
133 | void View::set_scale_offset(double scale, double offset) | |
134 | { | |
135 | _scale = scale; | |
136 | _offset = offset; | |
137 | ||
138 | update_scroll(); | |
139 | _ruler->update(); | |
140 | _viewport->update(); | |
141 | } | |
142 | ||
143 | bool View::cursors_shown() const | |
144 | { | |
145 | return _show_cursors; | |
146 | } | |
147 | ||
148 | void View::show_cursors(bool show) | |
149 | { | |
150 | _show_cursors = show; | |
151 | _ruler->update(); | |
152 | _viewport->update(); | |
153 | } | |
154 | ||
155 | std::pair<Cursor, Cursor>& View::cursors() | |
156 | { | |
157 | return _cursors; | |
158 | } | |
159 | ||
160 | const QPoint& View::hover_point() const | |
161 | { | |
162 | return _hover_point; | |
163 | } | |
164 | ||
165 | void View::get_scroll_layout(double &length, double &offset) const | |
166 | { | |
167 | const shared_ptr<SignalData> sig_data = _session.get_data(); | |
168 | if(!sig_data) | |
169 | return; | |
170 | ||
171 | length = _data_length / (sig_data->get_samplerate() * _scale); | |
172 | offset = _offset / _scale; | |
173 | } | |
174 | ||
175 | void View::update_scroll() | |
176 | { | |
177 | assert(_viewport); | |
178 | ||
179 | const QSize areaSize = _viewport->size(); | |
180 | ||
181 | // Set the horizontal scroll bar | |
182 | double length = 0, offset = 0; | |
183 | get_scroll_layout(length, offset); | |
184 | length = max(length - areaSize.width(), 0.0); | |
185 | ||
186 | horizontalScrollBar()->setPageStep(areaSize.width()); | |
187 | ||
188 | if(length < MaxScrollValue) { | |
189 | horizontalScrollBar()->setRange(0, length); | |
190 | horizontalScrollBar()->setSliderPosition(offset); | |
191 | } else { | |
192 | horizontalScrollBar()->setRange(0, MaxScrollValue); | |
193 | horizontalScrollBar()->setSliderPosition( | |
194 | _offset * MaxScrollValue / (_scale * length)); | |
195 | } | |
196 | ||
197 | // Set the vertical scrollbar | |
198 | verticalScrollBar()->setPageStep(areaSize.height()); | |
199 | verticalScrollBar()->setRange(0, | |
200 | _viewport->get_total_height() - areaSize.height()); | |
201 | } | |
202 | ||
203 | bool View::eventFilter(QObject *object, QEvent *event) | |
204 | { | |
205 | const QEvent::Type type = event->type(); | |
206 | if(type == QEvent::MouseMove) { | |
207 | ||
208 | const QMouseEvent *const mouse_event = (QMouseEvent*)event; | |
209 | if(object == _viewport) | |
210 | _hover_point = mouse_event->pos(); | |
211 | else if(object == _ruler) | |
212 | _hover_point = QPoint(mouse_event->x(), 0); | |
213 | else if(object == _header) | |
214 | _hover_point = QPoint(0, mouse_event->y()); | |
215 | else | |
216 | _hover_point = QPoint(-1, -1); | |
217 | ||
218 | hover_point_changed(); | |
219 | ||
220 | } else if(type == QEvent::Leave) { | |
221 | _hover_point = QPoint(-1, -1); | |
222 | hover_point_changed(); | |
223 | } | |
224 | ||
225 | return QObject::eventFilter(object, event); | |
226 | } | |
227 | ||
228 | bool View::viewportEvent(QEvent *e) | |
229 | { | |
230 | switch(e->type()) { | |
231 | case QEvent::Paint: | |
232 | case QEvent::MouseButtonPress: | |
233 | case QEvent::MouseButtonRelease: | |
234 | case QEvent::MouseButtonDblClick: | |
235 | case QEvent::MouseMove: | |
236 | case QEvent::Wheel: | |
237 | return false; | |
238 | ||
239 | default: | |
240 | return QAbstractScrollArea::viewportEvent(e); | |
241 | } | |
242 | } | |
243 | ||
244 | void View::resizeEvent(QResizeEvent *e) | |
245 | { | |
246 | _ruler->setGeometry(_viewport->x(), 0, | |
247 | _viewport->width(), _viewport->y()); | |
248 | _header->setGeometry(0, _viewport->y(), | |
249 | _viewport->x(), _viewport->height()); | |
250 | update_scroll(); | |
251 | } | |
252 | ||
253 | void View::h_scroll_value_changed(int value) | |
254 | { | |
255 | const int range = horizontalScrollBar()->maximum(); | |
256 | if(range < MaxScrollValue) | |
257 | _offset = _scale * value; | |
258 | else { | |
259 | double length = 0, offset; | |
260 | get_scroll_layout(length, offset); | |
261 | _offset = _scale * length * value / MaxScrollValue; | |
262 | } | |
263 | ||
264 | _ruler->update(); | |
265 | _viewport->update(); | |
266 | } | |
267 | ||
268 | void View::v_scroll_value_changed(int value) | |
269 | { | |
270 | _v_offset = value; | |
271 | _header->update(); | |
272 | _viewport->update(); | |
273 | } | |
274 | ||
275 | void View::data_updated() | |
276 | { | |
277 | // Get the new data length | |
278 | _data_length = 0; | |
279 | shared_ptr<LogicData> sig_data = _session.get_data(); | |
280 | if(sig_data) { | |
281 | deque< shared_ptr<LogicDataSnapshot> > &snapshots = | |
282 | sig_data->get_snapshots(); | |
283 | BOOST_FOREACH(shared_ptr<LogicDataSnapshot> s, snapshots) | |
284 | if(s) | |
285 | _data_length = max(_data_length, | |
286 | s->get_sample_count()); | |
287 | } | |
288 | ||
289 | // Update the scroll bars | |
290 | update_scroll(); | |
291 | ||
292 | // Repaint the view | |
293 | _viewport->update(); | |
294 | } | |
295 | ||
296 | void View::marker_time_changed() | |
297 | { | |
298 | _ruler->update(); | |
299 | _viewport->update(); | |
300 | } | |
301 | ||
302 | } // namespace view | |
303 | } // namespace pv |