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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 "rowitemowner.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 | ||
59 | class View : public QAbstractScrollArea, public RowItemOwner { | |
60 | Q_OBJECT | |
61 | ||
62 | private: | |
63 | enum StickyEvents { | |
64 | RowItemHExtentsChanged = 1, | |
65 | RowItemVExtentsChanged = 2 | |
66 | }; | |
67 | ||
68 | private: | |
69 | static const double MaxScale; | |
70 | static const double MinScale; | |
71 | ||
72 | static const int MaxScrollValue; | |
73 | static const int MaxViewAutoUpdateRate; | |
74 | ||
75 | static const int ScaleUnits[3]; | |
76 | ||
77 | public: | |
78 | explicit View(Session &session, QWidget *parent = 0); | |
79 | ||
80 | Session& session(); | |
81 | const Session& session() const; | |
82 | ||
83 | /** | |
84 | * Returns the view of the owner. | |
85 | */ | |
86 | virtual pv::view::View* view(); | |
87 | ||
88 | /** | |
89 | * Returns the view of the owner. | |
90 | */ | |
91 | virtual const pv::view::View* view() const; | |
92 | ||
93 | Viewport* viewport(); | |
94 | ||
95 | const Viewport* viewport() const; | |
96 | ||
97 | /** | |
98 | * Gets a list of time markers. | |
99 | */ | |
100 | std::vector< std::shared_ptr<TimeItem> > time_items() const; | |
101 | ||
102 | /** | |
103 | * Returns the view time scale in seconds per pixel. | |
104 | */ | |
105 | double scale() const; | |
106 | ||
107 | /** | |
108 | * Returns the time offset of the left edge of the view in | |
109 | * seconds. | |
110 | */ | |
111 | double offset() const; | |
112 | ||
113 | /** | |
114 | * Returns the vertical scroll offset. | |
115 | */ | |
116 | int owner_visual_v_offset() const; | |
117 | ||
118 | /** | |
119 | * Sets the visual v-offset. | |
120 | */ | |
121 | void set_v_offset(int offset); | |
122 | ||
123 | /** | |
124 | * Returns the SI prefix to apply to the graticule time markings. | |
125 | */ | |
126 | unsigned int tick_prefix() const; | |
127 | ||
128 | /** | |
129 | * Returns the number of fractional digits shown for the time markings. | |
130 | */ | |
131 | unsigned int tick_precision() const; | |
132 | ||
133 | /** | |
134 | * Returns period of the graticule time markings. | |
135 | */ | |
136 | double tick_period() const; | |
137 | ||
138 | /** | |
139 | * Returns the unit of time currently used. | |
140 | */ | |
141 | util::TimeUnit time_unit() const; | |
142 | ||
143 | /** | |
144 | * Returns the number of nested parents that this row item owner has. | |
145 | */ | |
146 | unsigned int depth() const; | |
147 | ||
148 | void zoom(double steps); | |
149 | void zoom(double steps, int offset); | |
150 | ||
151 | void zoom_fit(bool gui_state); | |
152 | ||
153 | void zoom_one_to_one(); | |
154 | ||
155 | /** | |
156 | * Sets the scale and offset. | |
157 | * @param scale The new view scale in seconds per pixel. | |
158 | * @param offset The view time offset in seconds. | |
159 | */ | |
160 | void set_scale_offset(double scale, double offset); | |
161 | ||
162 | std::set< std::shared_ptr<pv::data::SignalData> > | |
163 | get_visible_data() const; | |
164 | ||
165 | std::pair<double, double> get_time_extents() const; | |
166 | ||
167 | /** | |
168 | * Enables or disables sticky scrolling, i.e. the view always shows | |
169 | * the most recent samples when capturing data. | |
170 | */ | |
171 | void enable_sticky_scrolling(bool state); | |
172 | ||
173 | /** | |
174 | * Returns true if cursors are displayed. false otherwise. | |
175 | */ | |
176 | bool cursors_shown() const; | |
177 | ||
178 | /** | |
179 | * Shows or hides the cursors. | |
180 | */ | |
181 | void show_cursors(bool show = true); | |
182 | ||
183 | /** | |
184 | * Moves the cursors to a convenient position in the view. | |
185 | */ | |
186 | void centre_cursors(); | |
187 | ||
188 | /** | |
189 | * Returns a reference to the pair of cursors. | |
190 | */ | |
191 | std::shared_ptr<CursorPair> cursors() const; | |
192 | ||
193 | /** | |
194 | * Adds a new flag at a specified time. | |
195 | */ | |
196 | void add_flag(double time); | |
197 | ||
198 | /** | |
199 | * Removes a flag from the list. | |
200 | */ | |
201 | void remove_flag(std::shared_ptr<Flag> flag); | |
202 | ||
203 | /** | |
204 | * Gets the list of flags. | |
205 | */ | |
206 | std::vector< std::shared_ptr<Flag> > flags() const; | |
207 | ||
208 | const QPoint& hover_point() const; | |
209 | ||
210 | void update_viewport(); | |
211 | ||
212 | void restack_all_row_items(); | |
213 | ||
214 | Q_SIGNALS: | |
215 | void hover_point_changed(); | |
216 | ||
217 | void selection_changed(); | |
218 | ||
219 | void scale_offset_changed(); | |
220 | ||
221 | void sticky_scrolling_changed(bool state); | |
222 | ||
223 | void always_zoom_to_fit_changed(bool state); | |
224 | ||
225 | private: | |
226 | void get_scroll_layout(double &length, double &offset) const; | |
227 | ||
228 | /** | |
229 | * Simultaneously sets the zoom and offset. | |
230 | * @param scale The scale to set the view to in seconds per pixel. This | |
231 | * value is clamped between MinScale and MaxScale. | |
232 | * @param offset The offset of the left edge of the view in seconds. | |
233 | */ | |
234 | void set_zoom(double scale, int offset); | |
235 | ||
236 | /** | |
237 | * Find a tick spacing and number formatting that does not cause | |
238 | * the values to collide. | |
239 | */ | |
240 | void calculate_tick_spacing(); | |
241 | ||
242 | void update_scroll(); | |
243 | ||
244 | void update_layout(); | |
245 | ||
246 | /** | |
247 | * Satisifies RowItem functionality. | |
248 | * @param p the QPainter to paint into. | |
249 | * @param rect the rectangle of the header area. | |
250 | * @param hover true if the label is being hovered over by the mouse. | |
251 | */ | |
252 | void paint_label(QPainter &p, const QRect &rect, bool hover); | |
253 | ||
254 | /** | |
255 | * Computes the outline rectangle of a label. | |
256 | * @param rect the rectangle of the header area. | |
257 | * @return Returns the rectangle of the signal label. | |
258 | */ | |
259 | QRectF label_rect(const QRectF &rect); | |
260 | ||
261 | RowItemOwner* find_prevalent_trace_group( | |
262 | const std::shared_ptr<sigrok::ChannelGroup> &group, | |
263 | const std::unordered_map<std::shared_ptr<sigrok::Channel>, | |
264 | std::shared_ptr<Signal> > &signal_map); | |
265 | ||
266 | static std::vector< std::shared_ptr<Trace> > | |
267 | extract_new_traces_for_channels( | |
268 | const std::vector< std::shared_ptr<sigrok::Channel> > &channels, | |
269 | const std::unordered_map<std::shared_ptr<sigrok::Channel>, | |
270 | std::shared_ptr<Signal> > &signal_map, | |
271 | std::set< std::shared_ptr<Trace> > &add_list); | |
272 | ||
273 | void determine_time_unit(); | |
274 | ||
275 | private: | |
276 | bool eventFilter(QObject *object, QEvent *event); | |
277 | ||
278 | bool viewportEvent(QEvent *e); | |
279 | ||
280 | void resizeEvent(QResizeEvent *e); | |
281 | ||
282 | public: | |
283 | void row_item_appearance_changed(bool label, bool content); | |
284 | void time_item_appearance_changed(bool label, bool content); | |
285 | ||
286 | void extents_changed(bool horz, bool vert); | |
287 | ||
288 | private Q_SLOTS: | |
289 | ||
290 | void h_scroll_value_changed(int value); | |
291 | void v_scroll_value_changed(); | |
292 | ||
293 | void signals_changed(); | |
294 | void capture_state_updated(int state); | |
295 | void data_updated(); | |
296 | ||
297 | void perform_delayed_view_update(); | |
298 | ||
299 | void process_sticky_events(); | |
300 | ||
301 | void on_hover_point_changed(); | |
302 | ||
303 | private: | |
304 | Session &session_; | |
305 | ||
306 | Viewport *viewport_; | |
307 | Ruler *ruler_; | |
308 | Header *header_; | |
309 | ||
310 | /// The view time scale in seconds per pixel. | |
311 | double scale_; | |
312 | ||
313 | /// The view time offset in seconds. | |
314 | double offset_; | |
315 | ||
316 | bool updating_scroll_; | |
317 | bool sticky_scrolling_; | |
318 | bool always_zoom_to_fit_; | |
319 | QTimer delayed_view_updater_; | |
320 | ||
321 | double tick_period_; | |
322 | unsigned int tick_prefix_; | |
323 | unsigned int tick_precision_; | |
324 | util::TimeUnit time_unit_; | |
325 | ||
326 | bool show_cursors_; | |
327 | std::shared_ptr<CursorPair> cursors_; | |
328 | ||
329 | std::list< std::shared_ptr<Flag> > flags_; | |
330 | char next_flag_text_; | |
331 | ||
332 | QPoint hover_point_; | |
333 | ||
334 | unsigned int sticky_events_; | |
335 | QTimer lazy_event_handler_; | |
336 | }; | |
337 | ||
338 | } // namespace view | |
339 | } // namespace pv | |
340 | ||
341 | #endif // PULSEVIEW_PV_VIEW_VIEW_HPP |