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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 <cassert> | |
26 | #include <climits> | |
27 | #include <cmath> | |
28 | #include <mutex> | |
29 | ||
30 | #include <QEvent> | |
31 | #include <QMouseEvent> | |
32 | #include <QScrollBar> | |
33 | ||
34 | #include "cursorheader.h" | |
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_lock; | |
47 | using boost::shared_mutex; | |
48 | using pv::data::SignalData; | |
49 | using std::back_inserter; | |
50 | using std::deque; | |
51 | using std::list; | |
52 | using std::lock_guard; | |
53 | using std::max; | |
54 | using std::make_pair; | |
55 | using std::min; | |
56 | using std::pair; | |
57 | using std::set; | |
58 | using std::shared_ptr; | |
59 | using std::vector; | |
60 | using std::weak_ptr; | |
61 | ||
62 | namespace pv { | |
63 | namespace view { | |
64 | ||
65 | const double View::MaxScale = 1e9; | |
66 | const double View::MinScale = 1e-15; | |
67 | ||
68 | const int View::MaxScrollValue = INT_MAX / 2; | |
69 | ||
70 | const int View::SignalHeight = 30; | |
71 | const int View::SignalMargin = 10; | |
72 | ||
73 | const QColor View::CursorAreaColour(220, 231, 243); | |
74 | ||
75 | const QSizeF View::LabelPadding(4, 0); | |
76 | ||
77 | View::View(SigSession &session, QWidget *parent) : | |
78 | QAbstractScrollArea(parent), | |
79 | _session(session), | |
80 | _viewport(new Viewport(*this)), | |
81 | _ruler(new Ruler(*this)), | |
82 | _cursorheader(new CursorHeader(*this)), | |
83 | _header(new Header(*this)), | |
84 | _scale(1e-6), | |
85 | _offset(0), | |
86 | _v_offset(0), | |
87 | _updating_scroll(false), | |
88 | _show_cursors(false), | |
89 | _cursors(*this), | |
90 | _hover_point(-1, -1) | |
91 | { | |
92 | connect(horizontalScrollBar(), SIGNAL(valueChanged(int)), | |
93 | this, SLOT(h_scroll_value_changed(int))); | |
94 | connect(verticalScrollBar(), SIGNAL(valueChanged(int)), | |
95 | this, SLOT(v_scroll_value_changed(int))); | |
96 | ||
97 | connect(&_session, SIGNAL(signals_changed()), | |
98 | this, SLOT(signals_changed())); | |
99 | connect(&_session, SIGNAL(capture_state_changed(int)), | |
100 | this, SLOT(data_updated())); | |
101 | connect(&_session, SIGNAL(data_received()), | |
102 | this, SLOT(data_updated())); | |
103 | connect(&_session, SIGNAL(frame_ended()), | |
104 | this, SLOT(data_updated())); | |
105 | ||
106 | connect(_cursors.first().get(), SIGNAL(time_changed()), | |
107 | this, SLOT(marker_time_changed())); | |
108 | connect(_cursors.second().get(), SIGNAL(time_changed()), | |
109 | this, SLOT(marker_time_changed())); | |
110 | ||
111 | connect(_header, SIGNAL(geometry_updated()), | |
112 | this, SLOT(on_geometry_updated())); | |
113 | connect(_header, SIGNAL(signals_moved()), | |
114 | this, SLOT(on_signals_moved())); | |
115 | ||
116 | connect(_header, SIGNAL(selection_changed()), | |
117 | _cursorheader, SLOT(clear_selection())); | |
118 | connect(_cursorheader, SIGNAL(selection_changed()), | |
119 | _header, SLOT(clear_selection())); | |
120 | ||
121 | connect(_header, SIGNAL(selection_changed()), | |
122 | this, SIGNAL(selection_changed())); | |
123 | connect(_cursorheader, SIGNAL(selection_changed()), | |
124 | this, SIGNAL(selection_changed())); | |
125 | ||
126 | connect(this, SIGNAL(hover_point_changed()), | |
127 | this, SLOT(on_hover_point_changed())); | |
128 | ||
129 | setViewport(_viewport); | |
130 | ||
131 | _viewport->installEventFilter(this); | |
132 | _ruler->installEventFilter(this); | |
133 | _cursorheader->installEventFilter(this); | |
134 | _header->installEventFilter(this); | |
135 | ||
136 | // Trigger the initial event manually. The default device has signals | |
137 | // which were created before this object came into being | |
138 | signals_changed(); | |
139 | ||
140 | // make sure the transparent widgets are on the top | |
141 | _cursorheader->raise(); | |
142 | _header->raise(); | |
143 | } | |
144 | ||
145 | SigSession& View::session() | |
146 | { | |
147 | return _session; | |
148 | } | |
149 | ||
150 | const SigSession& View::session() const | |
151 | { | |
152 | return _session; | |
153 | } | |
154 | ||
155 | View* View::view() | |
156 | { | |
157 | return this; | |
158 | } | |
159 | ||
160 | const View* View::view() const | |
161 | { | |
162 | return this; | |
163 | } | |
164 | ||
165 | Viewport* View::viewport() | |
166 | { | |
167 | return _viewport; | |
168 | } | |
169 | ||
170 | const Viewport* View::viewport() const | |
171 | { | |
172 | return _viewport; | |
173 | } | |
174 | ||
175 | double View::scale() const | |
176 | { | |
177 | return _scale; | |
178 | } | |
179 | ||
180 | double View::offset() const | |
181 | { | |
182 | return _offset; | |
183 | } | |
184 | ||
185 | int View::owner_v_offset() const | |
186 | { | |
187 | return -_v_offset; | |
188 | } | |
189 | ||
190 | void View::zoom(double steps) | |
191 | { | |
192 | zoom(steps, _viewport->width() / 2); | |
193 | } | |
194 | ||
195 | void View::zoom(double steps, int offset) | |
196 | { | |
197 | set_zoom(_scale * pow(3.0/2.0, -steps), offset); | |
198 | } | |
199 | ||
200 | void View::zoom_fit() | |
201 | { | |
202 | const pair<double, double> extents = get_time_extents(); | |
203 | const double delta = extents.second - extents.first; | |
204 | if (delta < 1e-12) | |
205 | return; | |
206 | ||
207 | assert(_viewport); | |
208 | const int w = _viewport->width(); | |
209 | if (w <= 0) | |
210 | return; | |
211 | ||
212 | const double scale = max(min(delta / w, MaxScale), MinScale); | |
213 | set_scale_offset(scale, extents.first); | |
214 | } | |
215 | ||
216 | void View::zoom_one_to_one() | |
217 | { | |
218 | using pv::data::SignalData; | |
219 | ||
220 | // Make a set of all the visible data objects | |
221 | set< shared_ptr<SignalData> > visible_data = get_visible_data(); | |
222 | if (visible_data.empty()) | |
223 | return; | |
224 | ||
225 | double samplerate = 0.0; | |
226 | for (const shared_ptr<SignalData> d : visible_data) { | |
227 | assert(d); | |
228 | samplerate = max(samplerate, d->samplerate()); | |
229 | } | |
230 | ||
231 | if (samplerate == 0.0) | |
232 | return; | |
233 | ||
234 | assert(_viewport); | |
235 | const int w = _viewport->width(); | |
236 | if (w <= 0) | |
237 | return; | |
238 | ||
239 | set_zoom(1.0 / samplerate, w / 2); | |
240 | } | |
241 | ||
242 | void View::set_scale_offset(double scale, double offset) | |
243 | { | |
244 | _scale = scale; | |
245 | _offset = offset; | |
246 | ||
247 | update_scroll(); | |
248 | _ruler->update(); | |
249 | _cursorheader->update(); | |
250 | _viewport->update(); | |
251 | scale_offset_changed(); | |
252 | } | |
253 | ||
254 | set< shared_ptr<SignalData> > View::get_visible_data() const | |
255 | { | |
256 | shared_lock<shared_mutex> lock(session().signals_mutex()); | |
257 | const vector< shared_ptr<Signal> > &sigs(session().signals()); | |
258 | ||
259 | // Make a set of all the visible data objects | |
260 | set< shared_ptr<SignalData> > visible_data; | |
261 | for (const shared_ptr<Signal> sig : sigs) | |
262 | if (sig->enabled()) | |
263 | visible_data.insert(sig->data()); | |
264 | ||
265 | return visible_data; | |
266 | } | |
267 | ||
268 | pair<double, double> View::get_time_extents() const | |
269 | { | |
270 | const set< shared_ptr<SignalData> > visible_data = get_visible_data(); | |
271 | if (visible_data.empty()) | |
272 | return make_pair(0.0, 0.0); | |
273 | ||
274 | double left_time = DBL_MAX, right_time = DBL_MIN; | |
275 | for (const shared_ptr<SignalData> d : visible_data) | |
276 | { | |
277 | const double start_time = d->get_start_time(); | |
278 | double samplerate = d->samplerate(); | |
279 | samplerate = (samplerate <= 0.0) ? 1.0 : samplerate; | |
280 | ||
281 | left_time = min(left_time, start_time); | |
282 | right_time = max(right_time, start_time + | |
283 | d->get_max_sample_count() / samplerate); | |
284 | } | |
285 | ||
286 | assert(left_time < right_time); | |
287 | return make_pair(left_time, right_time); | |
288 | } | |
289 | ||
290 | bool View::cursors_shown() const | |
291 | { | |
292 | return _show_cursors; | |
293 | } | |
294 | ||
295 | void View::show_cursors(bool show) | |
296 | { | |
297 | _show_cursors = show; | |
298 | _cursorheader->update(); | |
299 | _viewport->update(); | |
300 | } | |
301 | ||
302 | void View::centre_cursors() | |
303 | { | |
304 | const double time_width = _scale * _viewport->width(); | |
305 | _cursors.first()->set_time(_offset + time_width * 0.4); | |
306 | _cursors.second()->set_time(_offset + time_width * 0.6); | |
307 | _cursorheader->update(); | |
308 | _viewport->update(); | |
309 | } | |
310 | ||
311 | CursorPair& View::cursors() | |
312 | { | |
313 | return _cursors; | |
314 | } | |
315 | ||
316 | const CursorPair& View::cursors() const | |
317 | { | |
318 | return _cursors; | |
319 | } | |
320 | ||
321 | const QPoint& View::hover_point() const | |
322 | { | |
323 | return _hover_point; | |
324 | } | |
325 | ||
326 | void View::normalize_layout() | |
327 | { | |
328 | int v_min = INT_MAX; | |
329 | for (const shared_ptr<RowItem> r : *this) | |
330 | v_min = min(r->v_offset(), v_min); | |
331 | ||
332 | const int delta = -min(v_min, 0); | |
333 | for (shared_ptr<RowItem> r : *this) | |
334 | r->set_v_offset(r->v_offset() + delta); | |
335 | ||
336 | verticalScrollBar()->setSliderPosition(_v_offset + delta); | |
337 | v_scroll_value_changed(verticalScrollBar()->sliderPosition()); | |
338 | } | |
339 | ||
340 | void View::update_viewport() | |
341 | { | |
342 | assert(_viewport); | |
343 | _viewport->update(); | |
344 | } | |
345 | ||
346 | void View::get_scroll_layout(double &length, double &offset) const | |
347 | { | |
348 | const pair<double, double> extents = get_time_extents(); | |
349 | length = (extents.second - extents.first) / _scale; | |
350 | offset = _offset / _scale; | |
351 | } | |
352 | ||
353 | void View::set_zoom(double scale, int offset) | |
354 | { | |
355 | const double cursor_offset = _offset + _scale * offset; | |
356 | const double new_scale = max(min(scale, MaxScale), MinScale); | |
357 | const double new_offset = cursor_offset - new_scale * offset; | |
358 | set_scale_offset(new_scale, new_offset); | |
359 | } | |
360 | ||
361 | void View::update_scroll() | |
362 | { | |
363 | assert(_viewport); | |
364 | ||
365 | const QSize areaSize = _viewport->size(); | |
366 | ||
367 | // Set the horizontal scroll bar | |
368 | double length = 0, offset = 0; | |
369 | get_scroll_layout(length, offset); | |
370 | length = max(length - areaSize.width(), 0.0); | |
371 | ||
372 | horizontalScrollBar()->setPageStep(areaSize.width() / 2); | |
373 | ||
374 | _updating_scroll = true; | |
375 | ||
376 | if (length < MaxScrollValue) { | |
377 | horizontalScrollBar()->setRange(0, length); | |
378 | horizontalScrollBar()->setSliderPosition(offset); | |
379 | } else { | |
380 | horizontalScrollBar()->setRange(0, MaxScrollValue); | |
381 | horizontalScrollBar()->setSliderPosition( | |
382 | _offset * MaxScrollValue / (_scale * length)); | |
383 | } | |
384 | ||
385 | _updating_scroll = false; | |
386 | ||
387 | // Set the vertical scrollbar | |
388 | verticalScrollBar()->setPageStep(areaSize.height()); | |
389 | verticalScrollBar()->setRange(0, | |
390 | _viewport->get_total_height() + SignalMargin - | |
391 | areaSize.height()); | |
392 | } | |
393 | ||
394 | void View::update_layout() | |
395 | { | |
396 | setViewportMargins( | |
397 | _header->sizeHint().width() - pv::view::Header::BaselineOffset, | |
398 | _ruler->sizeHint().height(), 0, 0); | |
399 | _ruler->setGeometry(_viewport->x(), 0, | |
400 | _viewport->width(), _viewport->y()); | |
401 | _cursorheader->setGeometry( | |
402 | _viewport->x(), | |
403 | _ruler->sizeHint().height() - _cursorheader->sizeHint().height() / 2, | |
404 | _viewport->width(), _cursorheader->sizeHint().height()); | |
405 | _header->setGeometry(0, _viewport->y(), | |
406 | _header->sizeHint().width(), _viewport->height()); | |
407 | update_scroll(); | |
408 | } | |
409 | ||
410 | void View::paint_label(QPainter &p, int right, bool hover) | |
411 | { | |
412 | (void)p; | |
413 | (void)right; | |
414 | (void)hover; | |
415 | } | |
416 | ||
417 | QRectF View::label_rect(int right) | |
418 | { | |
419 | (void)right; | |
420 | return QRectF(); | |
421 | } | |
422 | ||
423 | bool View::eventFilter(QObject *object, QEvent *event) | |
424 | { | |
425 | const QEvent::Type type = event->type(); | |
426 | if (type == QEvent::MouseMove) { | |
427 | ||
428 | const QMouseEvent *const mouse_event = (QMouseEvent*)event; | |
429 | if (object == _viewport) | |
430 | _hover_point = mouse_event->pos(); | |
431 | else if (object == _ruler || object == _cursorheader) | |
432 | _hover_point = QPoint(mouse_event->x(), 0); | |
433 | else if (object == _header) | |
434 | _hover_point = QPoint(0, mouse_event->y()); | |
435 | else | |
436 | _hover_point = QPoint(-1, -1); | |
437 | ||
438 | hover_point_changed(); | |
439 | ||
440 | } else if (type == QEvent::Leave) { | |
441 | _hover_point = QPoint(-1, -1); | |
442 | hover_point_changed(); | |
443 | } | |
444 | ||
445 | return QObject::eventFilter(object, event); | |
446 | } | |
447 | ||
448 | bool View::viewportEvent(QEvent *e) | |
449 | { | |
450 | switch(e->type()) { | |
451 | case QEvent::Paint: | |
452 | case QEvent::MouseButtonPress: | |
453 | case QEvent::MouseButtonRelease: | |
454 | case QEvent::MouseButtonDblClick: | |
455 | case QEvent::MouseMove: | |
456 | case QEvent::Wheel: | |
457 | case QEvent::TouchBegin: | |
458 | case QEvent::TouchUpdate: | |
459 | case QEvent::TouchEnd: | |
460 | return false; | |
461 | ||
462 | default: | |
463 | return QAbstractScrollArea::viewportEvent(e); | |
464 | } | |
465 | } | |
466 | ||
467 | void View::resizeEvent(QResizeEvent*) | |
468 | { | |
469 | update_layout(); | |
470 | } | |
471 | ||
472 | void View::h_scroll_value_changed(int value) | |
473 | { | |
474 | if (_updating_scroll) | |
475 | return; | |
476 | ||
477 | const int range = horizontalScrollBar()->maximum(); | |
478 | if (range < MaxScrollValue) | |
479 | _offset = _scale * value; | |
480 | else { | |
481 | double length = 0, offset; | |
482 | get_scroll_layout(length, offset); | |
483 | _offset = _scale * length * value / MaxScrollValue; | |
484 | } | |
485 | ||
486 | _ruler->update(); | |
487 | _cursorheader->update(); | |
488 | _viewport->update(); | |
489 | } | |
490 | ||
491 | void View::v_scroll_value_changed(int value) | |
492 | { | |
493 | _v_offset = value; | |
494 | _header->update(); | |
495 | _viewport->update(); | |
496 | } | |
497 | ||
498 | void View::signals_changed() | |
499 | { | |
500 | // Populate the traces | |
501 | clear_child_items(); | |
502 | ||
503 | shared_lock<shared_mutex> lock(session().signals_mutex()); | |
504 | const vector< shared_ptr<Signal> > &sigs(session().signals()); | |
505 | for (auto s : sigs) | |
506 | add_child_item(s); | |
507 | ||
508 | #ifdef ENABLE_DECODE | |
509 | const vector< shared_ptr<DecodeTrace> > decode_sigs( | |
510 | session().get_decode_signals()); | |
511 | for (auto s : decode_sigs) | |
512 | add_child_item(s); | |
513 | #endif | |
514 | ||
515 | // Create the initial layout | |
516 | int offset = SignalMargin + SignalHeight; | |
517 | for (shared_ptr<RowItem> r : *this) { | |
518 | r->set_v_offset(offset); | |
519 | offset += SignalHeight + 2 * SignalMargin; | |
520 | } | |
521 | ||
522 | update_layout(); | |
523 | normalize_layout(); | |
524 | ||
525 | // Update the child widgets | |
526 | _header->signals_updated(); | |
527 | _viewport->signals_updated(); | |
528 | } | |
529 | ||
530 | void View::data_updated() | |
531 | { | |
532 | // Update the scroll bars | |
533 | update_scroll(); | |
534 | ||
535 | // Repaint the view | |
536 | _viewport->update(); | |
537 | } | |
538 | ||
539 | void View::marker_time_changed() | |
540 | { | |
541 | _cursorheader->update(); | |
542 | _viewport->update(); | |
543 | } | |
544 | ||
545 | void View::on_signals_moved() | |
546 | { | |
547 | update_scroll(); | |
548 | signals_moved(); | |
549 | } | |
550 | ||
551 | void View::on_geometry_updated() | |
552 | { | |
553 | update_layout(); | |
554 | } | |
555 | ||
556 | void View::on_hover_point_changed() | |
557 | { | |
558 | for (shared_ptr<RowItem> r : *this) | |
559 | r->hover_point_changed(); | |
560 | } | |
561 | ||
562 | } // namespace view | |
563 | } // namespace pv |