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