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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 | #ifndef PULSEVIEW_PV_VIEW_VIEW_HPP | |
22 | #define PULSEVIEW_PV_VIEW_VIEW_HPP | |
23 | ||
24 | #include <stdint.h> | |
25 | ||
26 | #include <list> | |
27 | #include <memory> | |
28 | #include <set> | |
29 | #include <unordered_map> | |
30 | #include <vector> | |
31 | ||
32 | #include <QAbstractScrollArea> | |
33 | #include <QSizeF> | |
34 | #include <QTimer> | |
35 | ||
36 | #include <pv/data/signaldata.hpp> | |
37 | #include <pv/util.hpp> | |
38 | ||
39 | #include "cursorpair.hpp" | |
40 | #include "flag.hpp" | |
41 | #include "tracetreeitemowner.hpp" | |
42 | ||
43 | namespace sigrok { | |
44 | class ChannelGroup; | |
45 | } | |
46 | ||
47 | namespace pv { | |
48 | ||
49 | class Session; | |
50 | ||
51 | namespace view { | |
52 | ||
53 | class CursorHeader; | |
54 | class Header; | |
55 | class Ruler; | |
56 | class Trace; | |
57 | class Viewport; | |
58 | class TriggerMarker; | |
59 | ||
60 | class View : public QAbstractScrollArea, public TraceTreeItemOwner { | |
61 | Q_OBJECT | |
62 | ||
63 | private: | |
64 | enum StickyEvents { | |
65 | TraceTreeItemHExtentsChanged = 1, | |
66 | TraceTreeItemVExtentsChanged = 2 | |
67 | }; | |
68 | ||
69 | private: | |
70 | static const pv::util::Timestamp MaxScale; | |
71 | static const pv::util::Timestamp MinScale; | |
72 | ||
73 | static const int MaxScrollValue; | |
74 | static const int MaxViewAutoUpdateRate; | |
75 | ||
76 | static const int ScaleUnits[3]; | |
77 | ||
78 | public: | |
79 | explicit View(Session &session, QWidget *parent = 0); | |
80 | ||
81 | Session& session(); | |
82 | const Session& session() const; | |
83 | ||
84 | /** | |
85 | * Returns the view of the owner. | |
86 | */ | |
87 | virtual pv::view::View* view(); | |
88 | ||
89 | /** | |
90 | * Returns the view of the owner. | |
91 | */ | |
92 | virtual const pv::view::View* view() const; | |
93 | ||
94 | Viewport* viewport(); | |
95 | ||
96 | const Viewport* viewport() const; | |
97 | ||
98 | /** | |
99 | * Gets a list of time markers. | |
100 | */ | |
101 | std::vector< std::shared_ptr<TimeItem> > time_items() const; | |
102 | ||
103 | /** | |
104 | * Returns the view time scale in seconds per pixel. | |
105 | */ | |
106 | double scale() const; | |
107 | ||
108 | /** | |
109 | * Returns the time offset of the left edge of the view in | |
110 | * seconds. | |
111 | */ | |
112 | const pv::util::Timestamp& offset() const; | |
113 | ||
114 | /** | |
115 | * Returns the vertical scroll offset. | |
116 | */ | |
117 | int owner_visual_v_offset() const; | |
118 | ||
119 | /** | |
120 | * Sets the visual v-offset. | |
121 | */ | |
122 | void set_v_offset(int offset); | |
123 | ||
124 | /** | |
125 | * Returns the SI prefix to apply to the graticule time markings. | |
126 | */ | |
127 | pv::util::SIPrefix tick_prefix() const; | |
128 | ||
129 | /** | |
130 | * Returns the number of fractional digits shown for the time markings. | |
131 | */ | |
132 | unsigned int tick_precision() const; | |
133 | ||
134 | /** | |
135 | * Returns period of the graticule time markings. | |
136 | */ | |
137 | const pv::util::Timestamp& tick_period() const; | |
138 | ||
139 | /** | |
140 | * Returns the unit of time currently used. | |
141 | */ | |
142 | util::TimeUnit time_unit() const; | |
143 | ||
144 | /** | |
145 | * Returns the number of nested parents that this row item owner has. | |
146 | */ | |
147 | unsigned int depth() const; | |
148 | ||
149 | void zoom(double steps); | |
150 | void zoom(double steps, int offset); | |
151 | ||
152 | void zoom_fit(bool gui_state); | |
153 | ||
154 | void zoom_one_to_one(); | |
155 | ||
156 | /** | |
157 | * Sets the scale and offset. | |
158 | * @param scale The new view scale in seconds per pixel. | |
159 | * @param offset The view time offset in seconds. | |
160 | */ | |
161 | void set_scale_offset(double scale, const pv::util::Timestamp& offset); | |
162 | ||
163 | std::set< std::shared_ptr<pv::data::SignalData> > | |
164 | get_visible_data() const; | |
165 | ||
166 | std::pair<pv::util::Timestamp, pv::util::Timestamp> get_time_extents() const; | |
167 | ||
168 | /** | |
169 | * Enables or disables sticky scrolling, i.e. the view always shows | |
170 | * the most recent samples when capturing data. | |
171 | */ | |
172 | void enable_sticky_scrolling(bool state); | |
173 | ||
174 | /** | |
175 | * Enables or disables coloured trace backgrounds. If they're not | |
176 | * coloured then they will use alternating colors. | |
177 | */ | |
178 | void enable_coloured_bg(bool state); | |
179 | ||
180 | /** | |
181 | * Returns true if cursors are displayed. false otherwise. | |
182 | */ | |
183 | bool cursors_shown() const; | |
184 | ||
185 | /** | |
186 | * Shows or hides the cursors. | |
187 | */ | |
188 | void show_cursors(bool show = true); | |
189 | ||
190 | /** | |
191 | * Moves the cursors to a convenient position in the view. | |
192 | */ | |
193 | void centre_cursors(); | |
194 | ||
195 | /** | |
196 | * Returns a reference to the pair of cursors. | |
197 | */ | |
198 | std::shared_ptr<CursorPair> cursors() const; | |
199 | ||
200 | /** | |
201 | * Adds a new flag at a specified time. | |
202 | */ | |
203 | void add_flag(const pv::util::Timestamp& time); | |
204 | ||
205 | /** | |
206 | * Removes a flag from the list. | |
207 | */ | |
208 | void remove_flag(std::shared_ptr<Flag> flag); | |
209 | ||
210 | /** | |
211 | * Gets the list of flags. | |
212 | */ | |
213 | std::vector< std::shared_ptr<Flag> > flags() const; | |
214 | ||
215 | const QPoint& hover_point() const; | |
216 | ||
217 | void update_viewport(); | |
218 | ||
219 | void restack_all_trace_tree_items(); | |
220 | ||
221 | Q_SIGNALS: | |
222 | void hover_point_changed(); | |
223 | ||
224 | void selection_changed(); | |
225 | ||
226 | /// Emitted when the offset changed. | |
227 | void offset_changed(); | |
228 | ||
229 | /// Emitted when the scale changed. | |
230 | void scale_changed(); | |
231 | ||
232 | void sticky_scrolling_changed(bool state); | |
233 | ||
234 | void always_zoom_to_fit_changed(bool state); | |
235 | ||
236 | /// Emitted when the tick_prefix changed. | |
237 | void tick_prefix_changed(); | |
238 | ||
239 | /// Emitted when the tick_precision changed. | |
240 | void tick_precision_changed(); | |
241 | ||
242 | /// Emitted when the tick_period changed. | |
243 | void tick_period_changed(); | |
244 | ||
245 | /// Emitted when the time_unit changed. | |
246 | void time_unit_changed(); | |
247 | ||
248 | public Q_SLOTS: | |
249 | void trigger_event(util::Timestamp location); | |
250 | ||
251 | private: | |
252 | void get_scroll_layout(double &length, pv::util::Timestamp &offset) const; | |
253 | ||
254 | /** | |
255 | * Simultaneously sets the zoom and offset. | |
256 | * @param scale The scale to set the view to in seconds per pixel. This | |
257 | * value is clamped between MinScale and MaxScale. | |
258 | * @param offset The offset of the left edge of the view in seconds. | |
259 | */ | |
260 | void set_zoom(double scale, int offset); | |
261 | ||
262 | /** | |
263 | * Find a tick spacing and number formatting that does not cause | |
264 | * the values to collide. | |
265 | */ | |
266 | void calculate_tick_spacing(); | |
267 | ||
268 | void update_scroll(); | |
269 | ||
270 | void update_layout(); | |
271 | ||
272 | /** | |
273 | * Satisfies TraceTreeItem functionality. | |
274 | * @param p the QPainter to paint into. | |
275 | * @param rect the rectangle of the header area. | |
276 | * @param hover true if the label is being hovered over by the mouse. | |
277 | */ | |
278 | void paint_label(QPainter &p, const QRect &rect, bool hover); | |
279 | ||
280 | /** | |
281 | * Computes the outline rectangle of a label. | |
282 | * @param rect the rectangle of the header area. | |
283 | * @return Returns the rectangle of the signal label. | |
284 | */ | |
285 | QRectF label_rect(const QRectF &rect); | |
286 | ||
287 | TraceTreeItemOwner* find_prevalent_trace_group( | |
288 | const std::shared_ptr<sigrok::ChannelGroup> &group, | |
289 | const std::unordered_map<std::shared_ptr<sigrok::Channel>, | |
290 | std::shared_ptr<Signal> > &signal_map); | |
291 | ||
292 | static std::vector< std::shared_ptr<Trace> > | |
293 | extract_new_traces_for_channels( | |
294 | const std::vector< std::shared_ptr<sigrok::Channel> > &channels, | |
295 | const std::unordered_map<std::shared_ptr<sigrok::Channel>, | |
296 | std::shared_ptr<Signal> > &signal_map, | |
297 | std::set< std::shared_ptr<Trace> > &add_list); | |
298 | ||
299 | void determine_time_unit(); | |
300 | ||
301 | bool eventFilter(QObject *object, QEvent *event); | |
302 | ||
303 | bool viewportEvent(QEvent *event); | |
304 | ||
305 | void resizeEvent(QResizeEvent *event); | |
306 | ||
307 | public: | |
308 | void row_item_appearance_changed(bool label, bool content); | |
309 | void time_item_appearance_changed(bool label, bool content); | |
310 | ||
311 | void extents_changed(bool horz, bool vert); | |
312 | ||
313 | private Q_SLOTS: | |
314 | ||
315 | void h_scroll_value_changed(int value); | |
316 | void v_scroll_value_changed(); | |
317 | ||
318 | void signals_changed(); | |
319 | void capture_state_updated(int state); | |
320 | void data_updated(); | |
321 | ||
322 | void perform_delayed_view_update(); | |
323 | ||
324 | void process_sticky_events(); | |
325 | ||
326 | void on_hover_point_changed(); | |
327 | ||
328 | /** | |
329 | * Sets the 'offset_' member and emits the 'offset_changed' | |
330 | * signal if needed. | |
331 | */ | |
332 | void set_offset(const pv::util::Timestamp& offset); | |
333 | ||
334 | /** | |
335 | * Sets the 'scale_' member and emits the 'scale_changed' | |
336 | * signal if needed. | |
337 | */ | |
338 | void set_scale(double scale); | |
339 | ||
340 | /** | |
341 | * Sets the 'tick_prefix_' member and emits the 'tick_prefix_changed' | |
342 | * signal if needed. | |
343 | */ | |
344 | void set_tick_prefix(pv::util::SIPrefix tick_prefix); | |
345 | ||
346 | /** | |
347 | * Sets the 'tick_precision_' member and emits the 'tick_precision_changed' | |
348 | * signal if needed. | |
349 | */ | |
350 | void set_tick_precision(unsigned tick_precision); | |
351 | ||
352 | /** | |
353 | * Sets the 'tick_period_' member and emits the 'tick_period_changed' | |
354 | * signal if needed. | |
355 | */ | |
356 | void set_tick_period(const pv::util::Timestamp& tick_period); | |
357 | ||
358 | /** | |
359 | * Sets the 'time_unit' member and emits the 'time_unit_changed' | |
360 | * signal if needed. | |
361 | */ | |
362 | void set_time_unit(pv::util::TimeUnit time_unit); | |
363 | ||
364 | private: | |
365 | Session &session_; | |
366 | ||
367 | Viewport *viewport_; | |
368 | Ruler *ruler_; | |
369 | Header *header_; | |
370 | ||
371 | /// The view time scale in seconds per pixel. | |
372 | double scale_; | |
373 | ||
374 | /// The view time offset in seconds. | |
375 | pv::util::Timestamp offset_; | |
376 | ||
377 | bool updating_scroll_; | |
378 | bool sticky_scrolling_; | |
379 | bool always_zoom_to_fit_; | |
380 | QTimer delayed_view_updater_; | |
381 | ||
382 | pv::util::Timestamp tick_period_; | |
383 | pv::util::SIPrefix tick_prefix_; | |
384 | unsigned int tick_precision_; | |
385 | util::TimeUnit time_unit_; | |
386 | ||
387 | bool show_cursors_; | |
388 | std::shared_ptr<CursorPair> cursors_; | |
389 | ||
390 | std::list< std::shared_ptr<Flag> > flags_; | |
391 | char next_flag_text_; | |
392 | ||
393 | std::vector< std::shared_ptr<TriggerMarker> > trigger_markers_; | |
394 | ||
395 | QPoint hover_point_; | |
396 | ||
397 | unsigned int sticky_events_; | |
398 | QTimer lazy_event_handler_; | |
399 | }; | |
400 | ||
401 | } // namespace view | |
402 | } // namespace pv | |
403 | ||
404 | #endif // PULSEVIEW_PV_VIEW_VIEW_HPP |