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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 <memory> | |
27 | #include <set> | |
28 | #include <unordered_map> | |
29 | #include <vector> | |
30 | ||
31 | #include <QAbstractScrollArea> | |
32 | #include <QSizeF> | |
33 | #include <QTimer> | |
34 | ||
35 | #include <pv/data/signaldata.hpp> | |
36 | ||
37 | #include "cursorpair.hpp" | |
38 | #include "rowitemowner.hpp" | |
39 | ||
40 | namespace pv { | |
41 | ||
42 | class Session; | |
43 | ||
44 | namespace view { | |
45 | ||
46 | class CursorHeader; | |
47 | class Header; | |
48 | class Ruler; | |
49 | class Viewport; | |
50 | ||
51 | class View : public QAbstractScrollArea, public RowItemOwner { | |
52 | Q_OBJECT | |
53 | ||
54 | private: | |
55 | enum StickyEvents { | |
56 | SelectableItemHExtentsChanged = 1, | |
57 | SelectableItemVExtentsChanged = 2 | |
58 | }; | |
59 | ||
60 | private: | |
61 | static const double MaxScale; | |
62 | static const double MinScale; | |
63 | ||
64 | static const int MaxScrollValue; | |
65 | ||
66 | static const int ScaleUnits[3]; | |
67 | ||
68 | public: | |
69 | static const QColor CursorAreaColour; | |
70 | ||
71 | static const QSizeF LabelPadding; | |
72 | ||
73 | public: | |
74 | explicit View(Session &session, QWidget *parent = 0); | |
75 | ||
76 | Session& session(); | |
77 | const Session& session() const; | |
78 | ||
79 | /** | |
80 | * Returns the view of the owner. | |
81 | */ | |
82 | virtual pv::view::View* view(); | |
83 | ||
84 | /** | |
85 | * Returns the view of the owner. | |
86 | */ | |
87 | virtual const pv::view::View* view() const; | |
88 | ||
89 | Viewport* viewport(); | |
90 | ||
91 | const Viewport* viewport() const; | |
92 | ||
93 | /** | |
94 | * Gets a list of time markers. | |
95 | */ | |
96 | std::vector< std::shared_ptr<TimeItem> > time_items() const; | |
97 | ||
98 | /** | |
99 | * Returns the view time scale in seconds per pixel. | |
100 | */ | |
101 | double scale() const; | |
102 | ||
103 | /** | |
104 | * Returns the time offset of the left edge of the view in | |
105 | * seconds. | |
106 | */ | |
107 | double offset() const; | |
108 | int owner_visual_v_offset() const; | |
109 | ||
110 | /** | |
111 | * Returns the SI prefix to apply to the graticule time markings. | |
112 | */ | |
113 | unsigned int tick_prefix() const; | |
114 | ||
115 | /** | |
116 | * Returns period of the graticule time markings. | |
117 | */ | |
118 | double tick_period() const; | |
119 | ||
120 | /** | |
121 | * Returns the number of nested parents that this row item owner has. | |
122 | */ | |
123 | unsigned int depth() const; | |
124 | ||
125 | void zoom(double steps); | |
126 | void zoom(double steps, int offset); | |
127 | ||
128 | void zoom_fit(); | |
129 | ||
130 | void zoom_one_to_one(); | |
131 | ||
132 | /** | |
133 | * Sets the scale and offset. | |
134 | * @param scale The new view scale in seconds per pixel. | |
135 | * @param offset The view time offset in seconds. | |
136 | */ | |
137 | void set_scale_offset(double scale, double offset); | |
138 | ||
139 | std::set< std::shared_ptr<pv::data::SignalData> > | |
140 | get_visible_data() const; | |
141 | ||
142 | std::pair<double, double> get_time_extents() const; | |
143 | ||
144 | /** | |
145 | * Returns true if cursors are displayed. false otherwise. | |
146 | */ | |
147 | bool cursors_shown() const; | |
148 | ||
149 | /** | |
150 | * Shows or hides the cursors. | |
151 | */ | |
152 | void show_cursors(bool show = true); | |
153 | ||
154 | /** | |
155 | * Moves the cursors to a convenient position in the view. | |
156 | */ | |
157 | void centre_cursors(); | |
158 | ||
159 | /** | |
160 | * Returns a reference to the pair of cursors. | |
161 | */ | |
162 | std::shared_ptr<CursorPair> cursors() const; | |
163 | ||
164 | const QPoint& hover_point() const; | |
165 | ||
166 | void update_viewport(); | |
167 | ||
168 | void restack_all_row_items(); | |
169 | ||
170 | Q_SIGNALS: | |
171 | void hover_point_changed(); | |
172 | ||
173 | void signals_moved(); | |
174 | ||
175 | void selection_changed(); | |
176 | ||
177 | void scale_offset_changed(); | |
178 | ||
179 | private: | |
180 | void get_scroll_layout(double &length, double &offset) const; | |
181 | ||
182 | /** | |
183 | * Simultaneously sets the zoom and offset. | |
184 | * @param scale The scale to set the view to in seconds per pixel. This | |
185 | * value is clamped between MinScale and MaxScale. | |
186 | * @param offset The offset of the left edge of the view in seconds. | |
187 | */ | |
188 | void set_zoom(double scale, int offset); | |
189 | ||
190 | /** | |
191 | * Find a tick spacing and number formatting that does not cause | |
192 | * the values to collide. | |
193 | */ | |
194 | void calculate_tick_spacing(); | |
195 | ||
196 | void update_scroll(); | |
197 | ||
198 | void update_layout(); | |
199 | ||
200 | /** | |
201 | * Satisifies RowItem functionality. | |
202 | * @param p the QPainter to paint into. | |
203 | * @param rect the rectangle of the header area. | |
204 | * @param hover true if the label is being hovered over by the mouse. | |
205 | */ | |
206 | void paint_label(QPainter &p, const QRect &rect, bool hover); | |
207 | ||
208 | /** | |
209 | * Computes the outline rectangle of a label. | |
210 | * @param rect the rectangle of the header area. | |
211 | * @return Returns the rectangle of the signal label. | |
212 | */ | |
213 | QRectF label_rect(const QRectF &rect); | |
214 | ||
215 | static bool add_channels_to_owner( | |
216 | const std::vector< std::shared_ptr<sigrok::Channel> > &channels, | |
217 | RowItemOwner *owner, int &offset, | |
218 | std::unordered_map<std::shared_ptr<sigrok::Channel>, | |
219 | std::shared_ptr<Signal> > &signal_map, | |
220 | std::function<bool (std::shared_ptr<RowItem>)> filter_func = | |
221 | std::function<bool (std::shared_ptr<RowItem>)>()); | |
222 | ||
223 | static void apply_offset( | |
224 | std::shared_ptr<RowItem> row_item, int &offset); | |
225 | ||
226 | private: | |
227 | bool eventFilter(QObject *object, QEvent *event); | |
228 | ||
229 | bool viewportEvent(QEvent *e); | |
230 | ||
231 | void resizeEvent(QResizeEvent *e); | |
232 | ||
233 | public: | |
234 | void appearance_changed(bool label, bool content); | |
235 | ||
236 | void extents_changed(bool horz, bool vert); | |
237 | ||
238 | private Q_SLOTS: | |
239 | ||
240 | void h_scroll_value_changed(int value); | |
241 | void v_scroll_value_changed(int value); | |
242 | ||
243 | void signals_changed(); | |
244 | void data_updated(); | |
245 | ||
246 | void marker_time_changed(); | |
247 | ||
248 | void on_signals_moved(); | |
249 | ||
250 | void process_sticky_events(); | |
251 | ||
252 | void on_hover_point_changed(); | |
253 | ||
254 | private: | |
255 | Session &session_; | |
256 | ||
257 | Viewport *viewport_; | |
258 | Ruler *ruler_; | |
259 | CursorHeader *cursorheader_; | |
260 | Header *header_; | |
261 | ||
262 | /// The view time scale in seconds per pixel. | |
263 | double scale_; | |
264 | ||
265 | /// The view time offset in seconds. | |
266 | double offset_; | |
267 | ||
268 | int v_offset_; | |
269 | bool updating_scroll_; | |
270 | ||
271 | double tick_period_; | |
272 | unsigned int tick_prefix_; | |
273 | ||
274 | bool show_cursors_; | |
275 | std::shared_ptr<CursorPair> cursors_; | |
276 | ||
277 | QPoint hover_point_; | |
278 | ||
279 | unsigned int sticky_events_; | |
280 | QTimer lazy_event_handler_; | |
281 | }; | |
282 | ||
283 | } // namespace view | |
284 | } // namespace pv | |
285 | ||
286 | #endif // PULSEVIEW_PV_VIEW_VIEW_H |