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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_H | |
22 | #define PULSEVIEW_PV_VIEW_VIEW_H | |
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 | ||
38 | #include "cursorpair.hpp" | |
39 | #include "flag.hpp" | |
40 | #include "rowitemowner.hpp" | |
41 | ||
42 | namespace pv { | |
43 | ||
44 | class Session; | |
45 | ||
46 | namespace view { | |
47 | ||
48 | class CursorHeader; | |
49 | class Header; | |
50 | class Ruler; | |
51 | class Viewport; | |
52 | ||
53 | class View : public QAbstractScrollArea, public RowItemOwner { | |
54 | Q_OBJECT | |
55 | ||
56 | private: | |
57 | enum StickyEvents { | |
58 | RowItemHExtentsChanged = 1, | |
59 | RowItemVExtentsChanged = 2 | |
60 | }; | |
61 | ||
62 | private: | |
63 | static const double MaxScale; | |
64 | static const double MinScale; | |
65 | ||
66 | static const int MaxScrollValue; | |
67 | ||
68 | static const int ScaleUnits[3]; | |
69 | ||
70 | public: | |
71 | explicit View(Session &session, QWidget *parent = 0); | |
72 | ||
73 | Session& session(); | |
74 | const Session& session() const; | |
75 | ||
76 | /** | |
77 | * Returns the view of the owner. | |
78 | */ | |
79 | virtual pv::view::View* view(); | |
80 | ||
81 | /** | |
82 | * Returns the view of the owner. | |
83 | */ | |
84 | virtual const pv::view::View* view() const; | |
85 | ||
86 | Viewport* viewport(); | |
87 | ||
88 | const Viewport* viewport() const; | |
89 | ||
90 | /** | |
91 | * Gets a list of time markers. | |
92 | */ | |
93 | std::vector< std::shared_ptr<TimeItem> > time_items() const; | |
94 | ||
95 | /** | |
96 | * Returns the view time scale in seconds per pixel. | |
97 | */ | |
98 | double scale() const; | |
99 | ||
100 | /** | |
101 | * Returns the time offset of the left edge of the view in | |
102 | * seconds. | |
103 | */ | |
104 | double offset() const; | |
105 | ||
106 | /** | |
107 | * Returns the vertical scroll offset. | |
108 | */ | |
109 | int owner_visual_v_offset() const; | |
110 | ||
111 | /** | |
112 | * Sets the visual v-offset. | |
113 | */ | |
114 | void set_v_offset(int offset); | |
115 | ||
116 | /** | |
117 | * Returns the SI prefix to apply to the graticule time markings. | |
118 | */ | |
119 | unsigned int tick_prefix() const; | |
120 | ||
121 | /** | |
122 | * Returns period of the graticule time markings. | |
123 | */ | |
124 | double tick_period() const; | |
125 | ||
126 | /** | |
127 | * Returns the number of nested parents that this row item owner has. | |
128 | */ | |
129 | unsigned int depth() const; | |
130 | ||
131 | void zoom(double steps); | |
132 | void zoom(double steps, int offset); | |
133 | ||
134 | void zoom_fit(); | |
135 | ||
136 | void zoom_one_to_one(); | |
137 | ||
138 | /** | |
139 | * Sets the scale and offset. | |
140 | * @param scale The new view scale in seconds per pixel. | |
141 | * @param offset The view time offset in seconds. | |
142 | */ | |
143 | void set_scale_offset(double scale, double offset); | |
144 | ||
145 | std::set< std::shared_ptr<pv::data::SignalData> > | |
146 | get_visible_data() const; | |
147 | ||
148 | std::pair<double, double> get_time_extents() const; | |
149 | ||
150 | /** | |
151 | * Returns true if cursors are displayed. false otherwise. | |
152 | */ | |
153 | bool cursors_shown() const; | |
154 | ||
155 | /** | |
156 | * Shows or hides the cursors. | |
157 | */ | |
158 | void show_cursors(bool show = true); | |
159 | ||
160 | /** | |
161 | * Moves the cursors to a convenient position in the view. | |
162 | */ | |
163 | void centre_cursors(); | |
164 | ||
165 | /** | |
166 | * Returns a reference to the pair of cursors. | |
167 | */ | |
168 | std::shared_ptr<CursorPair> cursors() const; | |
169 | ||
170 | /** | |
171 | * Adds a new flag at a specified time. | |
172 | */ | |
173 | void add_flag(double time); | |
174 | ||
175 | /** | |
176 | * Removes a flag from the list. | |
177 | */ | |
178 | void remove_flag(std::shared_ptr<Flag> flag); | |
179 | ||
180 | /** | |
181 | * Gets the list of flags. | |
182 | */ | |
183 | std::vector< std::shared_ptr<Flag> > flags() const; | |
184 | ||
185 | const QPoint& hover_point() const; | |
186 | ||
187 | void update_viewport(); | |
188 | ||
189 | void restack_all_row_items(); | |
190 | ||
191 | Q_SIGNALS: | |
192 | void hover_point_changed(); | |
193 | ||
194 | void selection_changed(); | |
195 | ||
196 | void scale_offset_changed(); | |
197 | ||
198 | private: | |
199 | void get_scroll_layout(double &length, double &offset) const; | |
200 | ||
201 | /** | |
202 | * Simultaneously sets the zoom and offset. | |
203 | * @param scale The scale to set the view to in seconds per pixel. This | |
204 | * value is clamped between MinScale and MaxScale. | |
205 | * @param offset The offset of the left edge of the view in seconds. | |
206 | */ | |
207 | void set_zoom(double scale, int offset); | |
208 | ||
209 | /** | |
210 | * Find a tick spacing and number formatting that does not cause | |
211 | * the values to collide. | |
212 | */ | |
213 | void calculate_tick_spacing(); | |
214 | ||
215 | void update_scroll(); | |
216 | ||
217 | void update_layout(); | |
218 | ||
219 | /** | |
220 | * Satisifies RowItem functionality. | |
221 | * @param p the QPainter to paint into. | |
222 | * @param rect the rectangle of the header area. | |
223 | * @param hover true if the label is being hovered over by the mouse. | |
224 | */ | |
225 | void paint_label(QPainter &p, const QRect &rect, bool hover); | |
226 | ||
227 | /** | |
228 | * Computes the outline rectangle of a label. | |
229 | * @param rect the rectangle of the header area. | |
230 | * @return Returns the rectangle of the signal label. | |
231 | */ | |
232 | QRectF label_rect(const QRectF &rect); | |
233 | ||
234 | static bool add_channels_to_owner( | |
235 | const std::vector< std::shared_ptr<sigrok::Channel> > &channels, | |
236 | RowItemOwner *owner, int &offset, | |
237 | std::unordered_map<std::shared_ptr<sigrok::Channel>, | |
238 | std::shared_ptr<Signal> > &signal_map, | |
239 | std::function<bool (std::shared_ptr<RowItem>)> filter_func = | |
240 | std::function<bool (std::shared_ptr<RowItem>)>()); | |
241 | ||
242 | static void apply_offset( | |
243 | std::shared_ptr<RowItem> row_item, int &offset); | |
244 | ||
245 | private: | |
246 | bool eventFilter(QObject *object, QEvent *event); | |
247 | ||
248 | bool viewportEvent(QEvent *e); | |
249 | ||
250 | void resizeEvent(QResizeEvent *e); | |
251 | ||
252 | public: | |
253 | void row_item_appearance_changed(bool label, bool content); | |
254 | void time_item_appearance_changed(bool label, bool content); | |
255 | ||
256 | void extents_changed(bool horz, bool vert); | |
257 | ||
258 | private Q_SLOTS: | |
259 | ||
260 | void h_scroll_value_changed(int value); | |
261 | void v_scroll_value_changed(); | |
262 | ||
263 | void signals_changed(); | |
264 | void data_updated(); | |
265 | ||
266 | void process_sticky_events(); | |
267 | ||
268 | void on_hover_point_changed(); | |
269 | ||
270 | private: | |
271 | Session &session_; | |
272 | ||
273 | Viewport *viewport_; | |
274 | Ruler *ruler_; | |
275 | Header *header_; | |
276 | ||
277 | /// The view time scale in seconds per pixel. | |
278 | double scale_; | |
279 | ||
280 | /// The view time offset in seconds. | |
281 | double offset_; | |
282 | ||
283 | bool updating_scroll_; | |
284 | ||
285 | double tick_period_; | |
286 | unsigned int tick_prefix_; | |
287 | ||
288 | bool show_cursors_; | |
289 | std::shared_ptr<CursorPair> cursors_; | |
290 | ||
291 | std::list< std::shared_ptr<Flag> > flags_; | |
292 | char next_flag_text_; | |
293 | ||
294 | QPoint hover_point_; | |
295 | ||
296 | unsigned int sticky_events_; | |
297 | QTimer lazy_event_handler_; | |
298 | }; | |
299 | ||
300 | } // namespace view | |
301 | } // namespace pv | |
302 | ||
303 | #endif // PULSEVIEW_PV_VIEW_VIEW_H |