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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 <vector> | |
29 | ||
30 | #include <QAbstractScrollArea> | |
31 | #include <QSizeF> | |
32 | ||
33 | #include <pv/data/signaldata.h> | |
34 | ||
35 | #include "cursorpair.h" | |
36 | ||
37 | namespace pv { | |
38 | ||
39 | class SigSession; | |
40 | ||
41 | namespace view { | |
42 | ||
43 | class Header; | |
44 | class Ruler; | |
45 | class Trace; | |
46 | class Viewport; | |
47 | ||
48 | class View : public QAbstractScrollArea { | |
49 | Q_OBJECT | |
50 | ||
51 | private: | |
52 | static const double MaxScale; | |
53 | static const double MinScale; | |
54 | ||
55 | static const int MaxScrollValue; | |
56 | ||
57 | public: | |
58 | static const int SignalHeight; | |
59 | static const int SignalMargin; | |
60 | static const int SignalSnapGridSize; | |
61 | ||
62 | static const QColor CursorAreaColour; | |
63 | ||
64 | static const QSizeF LabelPadding; | |
65 | ||
66 | public: | |
67 | explicit View(SigSession &session, QWidget *parent = 0); | |
68 | ||
69 | SigSession& session(); | |
70 | const SigSession& session() const; | |
71 | ||
72 | /** | |
73 | * Returns the view time scale in seconds per pixel. | |
74 | */ | |
75 | double scale() const; | |
76 | ||
77 | /** | |
78 | * Returns the time offset of the left edge of the view in | |
79 | * seconds. | |
80 | */ | |
81 | double offset() const; | |
82 | int v_offset() const; | |
83 | ||
84 | void zoom(double steps); | |
85 | void zoom(double steps, int offset); | |
86 | ||
87 | void zoom_fit(); | |
88 | ||
89 | void zoom_one_to_one(); | |
90 | ||
91 | /** | |
92 | * Sets the scale and offset. | |
93 | * @param scale The new view scale in seconds per pixel. | |
94 | * @param offset The view time offset in seconds. | |
95 | */ | |
96 | void set_scale_offset(double scale, double offset); | |
97 | ||
98 | std::vector< std::shared_ptr<Trace> > get_traces() const; | |
99 | ||
100 | std::list<std::weak_ptr<SelectableItem> > selected_items() const; | |
101 | ||
102 | std::set< std::shared_ptr<pv::data::SignalData> > | |
103 | get_visible_data() const; | |
104 | ||
105 | std::pair<double, double> get_time_extents() const; | |
106 | ||
107 | /** | |
108 | * Returns true if cursors are displayed. false otherwise. | |
109 | */ | |
110 | bool cursors_shown() const; | |
111 | ||
112 | /** | |
113 | * Shows or hides the cursors. | |
114 | */ | |
115 | void show_cursors(bool show = true); | |
116 | ||
117 | /** | |
118 | * Moves the cursors to a convenient position in the view. | |
119 | */ | |
120 | void centre_cursors(); | |
121 | ||
122 | /** | |
123 | * Returns a reference to the pair of cursors. | |
124 | */ | |
125 | CursorPair& cursors(); | |
126 | ||
127 | /** | |
128 | * Returns a reference to the pair of cursors. | |
129 | */ | |
130 | const CursorPair& cursors() const; | |
131 | ||
132 | const QPoint& hover_point() const; | |
133 | ||
134 | void normalize_layout(); | |
135 | ||
136 | void update_viewport(); | |
137 | ||
138 | signals: | |
139 | void hover_point_changed(); | |
140 | ||
141 | void signals_moved(); | |
142 | ||
143 | void selection_changed(); | |
144 | ||
145 | void scale_offset_changed(); | |
146 | ||
147 | private: | |
148 | void get_scroll_layout(double &length, double &offset) const; | |
149 | ||
150 | /** | |
151 | * Simultaneously sets the zoom and offset. | |
152 | * @param scale The scale to set the view to in seconds per pixel. This | |
153 | * value is clamped between MinScale and MaxScale. | |
154 | * @param offset The offset of the left edge of the view in seconds. | |
155 | */ | |
156 | void set_zoom(double scale, int offset); | |
157 | ||
158 | void update_scroll(); | |
159 | ||
160 | void update_layout(); | |
161 | ||
162 | static bool compare_trace_v_offsets( | |
163 | const std::shared_ptr<pv::view::Trace> &a, | |
164 | const std::shared_ptr<pv::view::Trace> &b); | |
165 | ||
166 | private: | |
167 | bool eventFilter(QObject *object, QEvent *event); | |
168 | ||
169 | bool viewportEvent(QEvent *e); | |
170 | ||
171 | void resizeEvent(QResizeEvent *e); | |
172 | ||
173 | private slots: | |
174 | ||
175 | void h_scroll_value_changed(int value); | |
176 | void v_scroll_value_changed(int value); | |
177 | ||
178 | void signals_changed(); | |
179 | void data_updated(); | |
180 | ||
181 | void marker_time_changed(); | |
182 | ||
183 | void on_signals_moved(); | |
184 | ||
185 | void on_geometry_updated(); | |
186 | ||
187 | private: | |
188 | SigSession &_session; | |
189 | ||
190 | Viewport *_viewport; | |
191 | Ruler *_ruler; | |
192 | Header *_header; | |
193 | ||
194 | /// The view time scale in seconds per pixel. | |
195 | double _scale; | |
196 | ||
197 | /// The view time offset in seconds. | |
198 | double _offset; | |
199 | ||
200 | int _v_offset; | |
201 | bool _updating_scroll; | |
202 | ||
203 | bool _show_cursors; | |
204 | CursorPair _cursors; | |
205 | ||
206 | QPoint _hover_point; | |
207 | }; | |
208 | ||
209 | } // namespace view | |
210 | } // namespace pv | |
211 | ||
212 | #endif // PULSEVIEW_PV_VIEW_VIEW_H |