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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 | #ifdef ENABLE_DECODE | |
22 | #include <libsigrokdecode/libsigrokdecode.h> | |
23 | #endif | |
24 | ||
25 | #include <assert.h> | |
26 | #include <limits.h> | |
27 | #include <math.h> | |
28 | ||
29 | #include <boost/foreach.hpp> | |
30 | ||
31 | #include <QEvent> | |
32 | #include <QMouseEvent> | |
33 | #include <QScrollBar> | |
34 | ||
35 | #include "decodetrace.h" | |
36 | #include "header.h" | |
37 | #include "ruler.h" | |
38 | #include "signal.h" | |
39 | #include "view.h" | |
40 | #include "viewport.h" | |
41 | ||
42 | #include "pv/sigsession.h" | |
43 | #include "pv/data/logic.h" | |
44 | #include "pv/data/logicsnapshot.h" | |
45 | ||
46 | using boost::shared_ptr; | |
47 | using boost::weak_ptr; | |
48 | using pv::data::SignalData; | |
49 | using std::deque; | |
50 | using std::list; | |
51 | using std::max; | |
52 | using std::make_pair; | |
53 | using std::min; | |
54 | using std::pair; | |
55 | using std::set; | |
56 | using std::vector; | |
57 | ||
58 | namespace pv { | |
59 | namespace view { | |
60 | ||
61 | const double View::MaxScale = 1e9; | |
62 | const double View::MinScale = 1e-15; | |
63 | ||
64 | const int View::MaxScrollValue = INT_MAX / 2; | |
65 | ||
66 | const int View::SignalHeight = 30; | |
67 | const int View::SignalMargin = 10; | |
68 | const int View::SignalSnapGridSize = 10; | |
69 | ||
70 | const QColor View::CursorAreaColour(220, 231, 243); | |
71 | ||
72 | const QSizeF View::LabelPadding(4, 0); | |
73 | ||
74 | View::View(SigSession &session, QWidget *parent) : | |
75 | QAbstractScrollArea(parent), | |
76 | _session(session), | |
77 | _viewport(new Viewport(*this)), | |
78 | _ruler(new Ruler(*this)), | |
79 | _header(new Header(*this)), | |
80 | _scale(1e-6), | |
81 | _offset(0), | |
82 | _v_offset(0), | |
83 | _updating_scroll(false), | |
84 | _show_cursors(false), | |
85 | _cursors(*this), | |
86 | _hover_point(-1, -1) | |
87 | { | |
88 | connect(horizontalScrollBar(), SIGNAL(valueChanged(int)), | |
89 | this, SLOT(h_scroll_value_changed(int))); | |
90 | connect(verticalScrollBar(), SIGNAL(valueChanged(int)), | |
91 | this, SLOT(v_scroll_value_changed(int))); | |
92 | ||
93 | connect(&_session, SIGNAL(signals_changed()), | |
94 | this, SLOT(signals_changed())); | |
95 | connect(&_session, SIGNAL(data_updated()), | |
96 | this, SLOT(data_updated())); | |
97 | ||
98 | connect(_cursors.first().get(), SIGNAL(time_changed()), | |
99 | this, SLOT(marker_time_changed())); | |
100 | connect(_cursors.second().get(), SIGNAL(time_changed()), | |
101 | this, SLOT(marker_time_changed())); | |
102 | ||
103 | connect(_header, SIGNAL(geometry_updated()), | |
104 | this, SLOT(on_geometry_updated())); | |
105 | connect(_header, SIGNAL(signals_moved()), | |
106 | this, SLOT(on_signals_moved())); | |
107 | ||
108 | connect(_header, SIGNAL(selection_changed()), | |
109 | _ruler, SLOT(clear_selection())); | |
110 | connect(_ruler, SIGNAL(selection_changed()), | |
111 | _header, SLOT(clear_selection())); | |
112 | ||
113 | connect(_header, SIGNAL(selection_changed()), | |
114 | this, SIGNAL(selection_changed())); | |
115 | connect(_ruler, SIGNAL(selection_changed()), | |
116 | this, SIGNAL(selection_changed())); | |
117 | ||
118 | setViewport(_viewport); | |
119 | ||
120 | _viewport->installEventFilter(this); | |
121 | _ruler->installEventFilter(this); | |
122 | _header->installEventFilter(this); | |
123 | } | |
124 | ||
125 | SigSession& View::session() | |
126 | { | |
127 | return _session; | |
128 | } | |
129 | ||
130 | const SigSession& View::session() const | |
131 | { | |
132 | return _session; | |
133 | } | |
134 | ||
135 | double View::scale() const | |
136 | { | |
137 | return _scale; | |
138 | } | |
139 | ||
140 | double View::offset() const | |
141 | { | |
142 | return _offset; | |
143 | } | |
144 | ||
145 | int View::v_offset() const | |
146 | { | |
147 | return _v_offset; | |
148 | } | |
149 | ||
150 | void View::zoom(double steps) | |
151 | { | |
152 | zoom(steps, _viewport->width() / 2); | |
153 | } | |
154 | ||
155 | void View::zoom(double steps, int offset) | |
156 | { | |
157 | set_zoom(_scale * pow(3.0/2.0, -steps), offset); | |
158 | } | |
159 | ||
160 | void View::zoom_fit() | |
161 | { | |
162 | const pair<double, double> extents = get_time_extents(); | |
163 | const double delta = extents.second - extents.first; | |
164 | if (delta < 1e-12) | |
165 | return; | |
166 | ||
167 | assert(_viewport); | |
168 | const int w = _viewport->width(); | |
169 | if (w <= 0) | |
170 | return; | |
171 | ||
172 | const double scale = max(min(delta / w, MaxScale), MinScale); | |
173 | set_scale_offset(scale, extents.first); | |
174 | } | |
175 | ||
176 | void View::zoom_one_to_one() | |
177 | { | |
178 | using pv::data::SignalData; | |
179 | ||
180 | const vector< shared_ptr<Signal> > sigs( | |
181 | session().get_signals()); | |
182 | ||
183 | // Make a set of all the visible data objects | |
184 | set< shared_ptr<SignalData> > visible_data; | |
185 | BOOST_FOREACH(const shared_ptr<Signal> sig, sigs) | |
186 | if (sig->enabled()) | |
187 | visible_data.insert(sig->data()); | |
188 | ||
189 | if (visible_data.empty()) | |
190 | return; | |
191 | ||
192 | double samplerate = 0.0; | |
193 | BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) { | |
194 | assert(d); | |
195 | samplerate = max(samplerate, d->samplerate()); | |
196 | } | |
197 | ||
198 | if (samplerate == 0.0) | |
199 | return; | |
200 | ||
201 | assert(_viewport); | |
202 | const int w = _viewport->width(); | |
203 | if (w <= 0) | |
204 | return; | |
205 | ||
206 | set_zoom(1.0 / samplerate, w / 2); | |
207 | } | |
208 | ||
209 | void View::set_scale_offset(double scale, double offset) | |
210 | { | |
211 | _scale = scale; | |
212 | _offset = offset; | |
213 | ||
214 | update_scroll(); | |
215 | _ruler->update(); | |
216 | _viewport->update(); | |
217 | scale_offset_changed(); | |
218 | } | |
219 | ||
220 | vector< shared_ptr<Trace> > View::get_traces() const | |
221 | { | |
222 | const vector< shared_ptr<Signal> > sigs( | |
223 | session().get_signals()); | |
224 | #ifdef ENABLE_DECODE | |
225 | const vector< shared_ptr<DecodeTrace> > decode_sigs( | |
226 | session().get_decode_signals()); | |
227 | vector< shared_ptr<Trace> > traces( | |
228 | sigs.size() + decode_sigs.size()); | |
229 | #else | |
230 | vector< shared_ptr<Trace> > traces(sigs.size()); | |
231 | #endif | |
232 | ||
233 | vector< shared_ptr<Trace> >::iterator i = traces.begin(); | |
234 | i = copy(sigs.begin(), sigs.end(), i); | |
235 | #ifdef ENABLE_DECODE | |
236 | i = copy(decode_sigs.begin(), decode_sigs.end(), i); | |
237 | #endif | |
238 | ||
239 | stable_sort(traces.begin(), traces.end(), compare_trace_v_offsets); | |
240 | return traces; | |
241 | } | |
242 | ||
243 | list<weak_ptr<SelectableItem> > View::selected_items() const | |
244 | { | |
245 | list<weak_ptr<SelectableItem> > items; | |
246 | ||
247 | // List the selected signals | |
248 | const vector< shared_ptr<Trace> > traces(get_traces()); | |
249 | BOOST_FOREACH (shared_ptr<Trace> t, traces) { | |
250 | assert(t); | |
251 | if (t->selected()) | |
252 | items.push_back(t); | |
253 | } | |
254 | ||
255 | // List the selected cursors | |
256 | if (_cursors.first()->selected()) | |
257 | items.push_back(_cursors.first()); | |
258 | if (_cursors.second()->selected()) | |
259 | items.push_back(_cursors.second()); | |
260 | ||
261 | return items; | |
262 | } | |
263 | ||
264 | set< shared_ptr<SignalData> > View::get_visible_data() const | |
265 | { | |
266 | const vector< shared_ptr<Signal> > sigs( | |
267 | session().get_signals()); | |
268 | ||
269 | // Make a set of all the visible data objects | |
270 | set< shared_ptr<SignalData> > visible_data; | |
271 | BOOST_FOREACH(const shared_ptr<Signal> sig, sigs) | |
272 | if (sig->enabled()) | |
273 | visible_data.insert(sig->data()); | |
274 | ||
275 | return visible_data; | |
276 | } | |
277 | ||
278 | pair<double, double> View::get_time_extents() const | |
279 | { | |
280 | const set< shared_ptr<SignalData> > visible_data = get_visible_data(); | |
281 | if (visible_data.empty()) | |
282 | return make_pair(0.0, 0.0); | |
283 | ||
284 | double left_time = DBL_MAX, right_time = DBL_MIN; | |
285 | BOOST_FOREACH(const shared_ptr<SignalData> d, visible_data) | |
286 | { | |
287 | const double start_time = d->get_start_time(); | |
288 | double samplerate = d->samplerate(); | |
289 | samplerate = (samplerate <= 0.0) ? 1.0 : samplerate; | |
290 | ||
291 | left_time = min(left_time, start_time); | |
292 | right_time = max(right_time, start_time + | |
293 | d->get_max_sample_count() / samplerate); | |
294 | } | |
295 | ||
296 | assert(left_time < right_time); | |
297 | return make_pair(left_time, right_time); | |
298 | } | |
299 | ||
300 | bool View::cursors_shown() const | |
301 | { | |
302 | return _show_cursors; | |
303 | } | |
304 | ||
305 | void View::show_cursors(bool show) | |
306 | { | |
307 | _show_cursors = show; | |
308 | _ruler->update(); | |
309 | _viewport->update(); | |
310 | } | |
311 | ||
312 | void View::centre_cursors() | |
313 | { | |
314 | const double time_width = _scale * _viewport->width(); | |
315 | _cursors.first()->set_time(_offset + time_width * 0.4); | |
316 | _cursors.second()->set_time(_offset + time_width * 0.6); | |
317 | _ruler->update(); | |
318 | _viewport->update(); | |
319 | } | |
320 | ||
321 | CursorPair& View::cursors() | |
322 | { | |
323 | return _cursors; | |
324 | } | |
325 | ||
326 | const CursorPair& View::cursors() const | |
327 | { | |
328 | return _cursors; | |
329 | } | |
330 | ||
331 | const QPoint& View::hover_point() const | |
332 | { | |
333 | return _hover_point; | |
334 | } | |
335 | ||
336 | void View::normalize_layout() | |
337 | { | |
338 | const vector< shared_ptr<Trace> > traces(get_traces()); | |
339 | ||
340 | int v_min = INT_MAX; | |
341 | BOOST_FOREACH(const shared_ptr<Trace> t, traces) | |
342 | v_min = min(t->get_v_offset(), v_min); | |
343 | ||
344 | const int delta = -min(v_min, 0); | |
345 | BOOST_FOREACH(shared_ptr<Trace> t, traces) | |
346 | t->set_v_offset(t->get_v_offset() + delta); | |
347 | ||
348 | verticalScrollBar()->setSliderPosition(_v_offset + delta); | |
349 | v_scroll_value_changed(verticalScrollBar()->sliderPosition()); | |
350 | } | |
351 | ||
352 | void View::update_viewport() | |
353 | { | |
354 | assert(_viewport); | |
355 | _viewport->update(); | |
356 | } | |
357 | ||
358 | void View::get_scroll_layout(double &length, double &offset) const | |
359 | { | |
360 | const pair<double, double> extents = get_time_extents(); | |
361 | length = (extents.second - extents.first) / _scale; | |
362 | offset = _offset / _scale; | |
363 | } | |
364 | ||
365 | void View::set_zoom(double scale, int offset) | |
366 | { | |
367 | const double cursor_offset = _offset + _scale * offset; | |
368 | const double new_scale = max(min(scale, MaxScale), MinScale); | |
369 | const double new_offset = cursor_offset - new_scale * offset; | |
370 | set_scale_offset(new_scale, new_offset); | |
371 | } | |
372 | ||
373 | void View::update_scroll() | |
374 | { | |
375 | assert(_viewport); | |
376 | ||
377 | const QSize areaSize = _viewport->size(); | |
378 | ||
379 | // Set the horizontal scroll bar | |
380 | double length = 0, offset = 0; | |
381 | get_scroll_layout(length, offset); | |
382 | length = max(length - areaSize.width(), 0.0); | |
383 | ||
384 | horizontalScrollBar()->setPageStep(areaSize.width() / 2); | |
385 | ||
386 | _updating_scroll = true; | |
387 | ||
388 | if (length < MaxScrollValue) { | |
389 | horizontalScrollBar()->setRange(0, length); | |
390 | horizontalScrollBar()->setSliderPosition(offset); | |
391 | } else { | |
392 | horizontalScrollBar()->setRange(0, MaxScrollValue); | |
393 | horizontalScrollBar()->setSliderPosition( | |
394 | _offset * MaxScrollValue / (_scale * length)); | |
395 | } | |
396 | ||
397 | _updating_scroll = false; | |
398 | ||
399 | // Set the vertical scrollbar | |
400 | verticalScrollBar()->setPageStep(areaSize.height()); | |
401 | verticalScrollBar()->setRange(0, | |
402 | _viewport->get_total_height() + SignalMargin - | |
403 | areaSize.height()); | |
404 | } | |
405 | ||
406 | void View::update_layout() | |
407 | { | |
408 | setViewportMargins(_header->sizeHint().width(), | |
409 | _ruler->sizeHint().height(), 0, 0); | |
410 | _ruler->setGeometry(_viewport->x(), 0, | |
411 | _viewport->width(), _viewport->y()); | |
412 | _header->setGeometry(0, _viewport->y(), | |
413 | _viewport->x(), _viewport->height()); | |
414 | update_scroll(); | |
415 | } | |
416 | ||
417 | bool View::compare_trace_v_offsets(const shared_ptr<Trace> &a, | |
418 | const shared_ptr<Trace> &b) | |
419 | { | |
420 | assert(a); | |
421 | assert(b); | |
422 | return a->get_v_offset() < b->get_v_offset(); | |
423 | } | |
424 | ||
425 | bool View::eventFilter(QObject *object, QEvent *event) | |
426 | { | |
427 | const QEvent::Type type = event->type(); | |
428 | if (type == QEvent::MouseMove) { | |
429 | ||
430 | const QMouseEvent *const mouse_event = (QMouseEvent*)event; | |
431 | if (object == _viewport) | |
432 | _hover_point = mouse_event->pos(); | |
433 | else if (object == _ruler) | |
434 | _hover_point = QPoint(mouse_event->x(), 0); | |
435 | else if (object == _header) | |
436 | _hover_point = QPoint(0, mouse_event->y()); | |
437 | else | |
438 | _hover_point = QPoint(-1, -1); | |
439 | ||
440 | hover_point_changed(); | |
441 | ||
442 | } else if (type == QEvent::Leave) { | |
443 | _hover_point = QPoint(-1, -1); | |
444 | hover_point_changed(); | |
445 | } | |
446 | ||
447 | return QObject::eventFilter(object, event); | |
448 | } | |
449 | ||
450 | bool View::viewportEvent(QEvent *e) | |
451 | { | |
452 | switch(e->type()) { | |
453 | case QEvent::Paint: | |
454 | case QEvent::MouseButtonPress: | |
455 | case QEvent::MouseButtonRelease: | |
456 | case QEvent::MouseButtonDblClick: | |
457 | case QEvent::MouseMove: | |
458 | case QEvent::Wheel: | |
459 | return false; | |
460 | ||
461 | default: | |
462 | return QAbstractScrollArea::viewportEvent(e); | |
463 | } | |
464 | } | |
465 | ||
466 | void View::resizeEvent(QResizeEvent*) | |
467 | { | |
468 | update_layout(); | |
469 | } | |
470 | ||
471 | void View::h_scroll_value_changed(int value) | |
472 | { | |
473 | if (_updating_scroll) | |
474 | return; | |
475 | ||
476 | const int range = horizontalScrollBar()->maximum(); | |
477 | if (range < MaxScrollValue) | |
478 | _offset = _scale * value; | |
479 | else { | |
480 | double length = 0, offset; | |
481 | get_scroll_layout(length, offset); | |
482 | _offset = _scale * length * value / MaxScrollValue; | |
483 | } | |
484 | ||
485 | _ruler->update(); | |
486 | _viewport->update(); | |
487 | } | |
488 | ||
489 | void View::v_scroll_value_changed(int value) | |
490 | { | |
491 | _v_offset = value; | |
492 | _header->update(); | |
493 | _viewport->update(); | |
494 | } | |
495 | ||
496 | void View::signals_changed() | |
497 | { | |
498 | int offset = SignalMargin + SignalHeight; | |
499 | const vector< shared_ptr<Trace> > traces(get_traces()); | |
500 | BOOST_FOREACH(shared_ptr<Trace> t, traces) { | |
501 | t->set_view(this); | |
502 | t->set_v_offset(offset); | |
503 | offset += SignalHeight + 2 * SignalMargin; | |
504 | } | |
505 | ||
506 | update_layout(); | |
507 | normalize_layout(); | |
508 | } | |
509 | ||
510 | void View::data_updated() | |
511 | { | |
512 | // Update the scroll bars | |
513 | update_scroll(); | |
514 | ||
515 | // Repaint the view | |
516 | _viewport->update(); | |
517 | } | |
518 | ||
519 | void View::marker_time_changed() | |
520 | { | |
521 | _ruler->update(); | |
522 | _viewport->update(); | |
523 | } | |
524 | ||
525 | void View::on_signals_moved() | |
526 | { | |
527 | update_scroll(); | |
528 | signals_moved(); | |
529 | } | |
530 | ||
531 | void View::on_geometry_updated() | |
532 | { | |
533 | update_layout(); | |
534 | } | |
535 | ||
536 | } // namespace view | |
537 | } // namespace pv |