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adb4b10c JH |
1 | /* |
2 | * This file is part of the sigrok 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 | #include <assert.h> | |
22 | #include <math.h> | |
23 | ||
24 | #include <boost/foreach.hpp> | |
25 | ||
26 | #include <QEvent> | |
27 | #include <QScrollBar> | |
28 | ||
cdf7bea7 JH |
29 | #include "view.h" |
30 | #include "viewport.h" | |
adb4b10c | 31 | |
cdf7bea7 JH |
32 | #include "../../logicdata.h" |
33 | #include "../../logicdatasnapshot.h" | |
34 | #include "../../sigsession.h" | |
adb4b10c JH |
35 | |
36 | using namespace boost; | |
37 | using namespace std; | |
38 | ||
cdf7bea7 JH |
39 | namespace pv { |
40 | namespace view { | |
adb4b10c | 41 | |
cdf7bea7 JH |
42 | const double View::MaxScale = 1e9; |
43 | const double View::MinScale = 1e-15; | |
adb4b10c | 44 | |
cdf7bea7 JH |
45 | const int View::LabelMarginWidth = 70; |
46 | const int View::RulerHeight = 30; | |
47 | ||
48 | View::View(SigSession &session, QWidget *parent) : | |
adb4b10c JH |
49 | QAbstractScrollArea(parent), |
50 | _session(session), | |
cdf7bea7 | 51 | _viewport(new Viewport(*this)), |
adb4b10c JH |
52 | _data_length(0), |
53 | _scale(1e-6), | |
54 | _offset(0), | |
55 | _v_offset(0) | |
56 | { | |
57 | connect(horizontalScrollBar(), SIGNAL(valueChanged(int)), | |
58 | this, SLOT(h_scroll_value_changed(int))); | |
59 | connect(verticalScrollBar(), SIGNAL(valueChanged(int)), | |
60 | this, SLOT(v_scroll_value_changed(int))); | |
61 | connect(&_session, SIGNAL(data_updated()), | |
62 | this, SLOT(data_updated())); | |
63 | setViewport(_viewport); | |
64 | } | |
65 | ||
1d19ef83 JH |
66 | SigSession& View::session() |
67 | { | |
68 | return _session; | |
69 | } | |
70 | ||
cdf7bea7 | 71 | double View::scale() const |
adb4b10c JH |
72 | { |
73 | return _scale; | |
74 | } | |
75 | ||
cdf7bea7 | 76 | double View::offset() const |
adb4b10c JH |
77 | { |
78 | return _offset; | |
79 | } | |
80 | ||
cdf7bea7 | 81 | int View::v_offset() const |
adb4b10c JH |
82 | { |
83 | return _v_offset; | |
84 | } | |
85 | ||
cdf7bea7 | 86 | void View::zoom(double steps) |
adb4b10c JH |
87 | { |
88 | zoom(steps, (width() - LabelMarginWidth) / 2); | |
89 | } | |
90 | ||
cdf7bea7 | 91 | void View::set_scale_offset(double scale, double offset) |
adb4b10c JH |
92 | { |
93 | _scale = scale; | |
94 | _offset = offset; | |
95 | update_scroll(); | |
96 | _viewport->update(); | |
97 | } | |
98 | ||
cdf7bea7 | 99 | void View::update_scroll() |
adb4b10c JH |
100 | { |
101 | assert(_viewport); | |
102 | ||
103 | const QSize areaSize = _viewport->size(); | |
104 | ||
105 | // Set the horizontal scroll bar | |
106 | double length = 0, offset = 0; | |
107 | const shared_ptr<SignalData> sig_data = _session.get_data(); | |
108 | if(sig_data) { | |
109 | length = _data_length / | |
110 | (sig_data->get_samplerate() * _scale); | |
111 | offset = _offset / _scale; | |
112 | } | |
113 | ||
114 | horizontalScrollBar()->setPageStep(areaSize.width()); | |
115 | horizontalScrollBar()->setRange(0, | |
116 | max((int)(length - areaSize.width()), 0)); | |
117 | horizontalScrollBar()->setSliderPosition(offset); | |
118 | ||
119 | // Set the vertical scrollbar | |
120 | verticalScrollBar()->setPageStep(areaSize.height()); | |
121 | verticalScrollBar()->setRange(0, | |
122 | _viewport->get_total_height() - areaSize.height()); | |
123 | } | |
124 | ||
cdf7bea7 | 125 | void View::zoom(double steps, int offset) |
adb4b10c JH |
126 | { |
127 | const double cursor_offset = _offset + _scale * offset; | |
128 | _scale *= pow(3.0/2.0, -steps); | |
129 | _scale = max(min(_scale, MaxScale), MinScale); | |
130 | _offset = cursor_offset - _scale * offset; | |
131 | _viewport->update(); | |
132 | update_scroll(); | |
133 | } | |
134 | ||
cdf7bea7 | 135 | bool View::viewportEvent(QEvent *e) |
adb4b10c JH |
136 | { |
137 | switch(e->type()) { | |
138 | case QEvent::Paint: | |
139 | case QEvent::MouseButtonPress: | |
140 | case QEvent::MouseButtonRelease: | |
141 | case QEvent::MouseButtonDblClick: | |
142 | case QEvent::MouseMove: | |
143 | case QEvent::Wheel: | |
144 | return false; | |
145 | ||
146 | default: | |
147 | return QAbstractScrollArea::viewportEvent(e); | |
148 | } | |
149 | } | |
150 | ||
cdf7bea7 | 151 | void View::resizeEvent(QResizeEvent *e) |
adb4b10c JH |
152 | { |
153 | update_scroll(); | |
154 | } | |
155 | ||
cdf7bea7 | 156 | void View::h_scroll_value_changed(int value) |
adb4b10c JH |
157 | { |
158 | _offset = _scale * value; | |
159 | _viewport->update(); | |
160 | } | |
161 | ||
cdf7bea7 | 162 | void View::v_scroll_value_changed(int value) |
adb4b10c JH |
163 | { |
164 | _v_offset = value; | |
165 | _viewport->update(); | |
166 | } | |
167 | ||
cdf7bea7 | 168 | void View::data_updated() |
adb4b10c JH |
169 | { |
170 | // Get the new data length | |
171 | _data_length = 0; | |
172 | shared_ptr<LogicData> sig_data = _session.get_data(); | |
173 | if(sig_data) { | |
174 | deque< shared_ptr<LogicDataSnapshot> > &snapshots = | |
175 | sig_data->get_snapshots(); | |
176 | BOOST_FOREACH(shared_ptr<LogicDataSnapshot> s, snapshots) | |
177 | if(s) | |
178 | _data_length = max(_data_length, | |
179 | s->get_sample_count()); | |
180 | } | |
181 | ||
182 | // Update the scroll bars | |
183 | update_scroll(); | |
184 | ||
185 | // Repaint the view | |
186 | _viewport->update(); | |
187 | } | |
cdf7bea7 JH |
188 | |
189 | } // namespace view | |
190 | } // namespace pv |