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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 | ||
29 | #include "header.h" | |
30 | #include "ruler.h" | |
31 | #include "view.h" | |
32 | #include "viewport.h" | |
33 | ||
34 | #include "../../logicdata.h" | |
35 | #include "../../logicdatasnapshot.h" | |
36 | #include "../../sigsession.h" | |
37 | ||
38 | using namespace boost; | |
39 | using namespace std; | |
40 | ||
41 | namespace pv { | |
42 | namespace view { | |
43 | ||
44 | const double View::MaxScale = 1e9; | |
45 | const double View::MinScale = 1e-15; | |
46 | ||
47 | const int View::LabelMarginWidth = 70; | |
48 | const int View::RulerHeight = 30; | |
49 | ||
50 | const int View::SignalHeight = 50; | |
51 | ||
52 | View::View(SigSession &session, QWidget *parent) : | |
53 | QAbstractScrollArea(parent), | |
54 | _session(session), | |
55 | _viewport(new Viewport(*this)), | |
56 | _ruler(new Ruler(*this)), | |
57 | _header(new Header(*this)), | |
58 | _data_length(0), | |
59 | _scale(1e-6), | |
60 | _offset(0), | |
61 | _v_offset(0) | |
62 | { | |
63 | connect(horizontalScrollBar(), SIGNAL(valueChanged(int)), | |
64 | this, SLOT(h_scroll_value_changed(int))); | |
65 | connect(verticalScrollBar(), SIGNAL(valueChanged(int)), | |
66 | this, SLOT(v_scroll_value_changed(int))); | |
67 | connect(&_session, SIGNAL(data_updated()), | |
68 | this, SLOT(data_updated())); | |
69 | ||
70 | setViewportMargins(LabelMarginWidth, RulerHeight, 0, 0); | |
71 | setViewport(_viewport); | |
72 | } | |
73 | ||
74 | SigSession& View::session() | |
75 | { | |
76 | return _session; | |
77 | } | |
78 | ||
79 | double View::scale() const | |
80 | { | |
81 | return _scale; | |
82 | } | |
83 | ||
84 | double View::offset() const | |
85 | { | |
86 | return _offset; | |
87 | } | |
88 | ||
89 | int View::v_offset() const | |
90 | { | |
91 | return _v_offset; | |
92 | } | |
93 | ||
94 | void View::zoom(double steps) | |
95 | { | |
96 | zoom(steps, (width() - LabelMarginWidth) / 2); | |
97 | } | |
98 | ||
99 | void View::zoom(double steps, int offset) | |
100 | { | |
101 | const double cursor_offset = _offset + _scale * offset; | |
102 | _scale *= pow(3.0/2.0, -steps); | |
103 | _scale = max(min(_scale, MaxScale), MinScale); | |
104 | _offset = cursor_offset - _scale * offset; | |
105 | ||
106 | _ruler->update(); | |
107 | _viewport->update(); | |
108 | update_scroll(); | |
109 | } | |
110 | ||
111 | ||
112 | void View::set_scale_offset(double scale, double offset) | |
113 | { | |
114 | _scale = scale; | |
115 | _offset = offset; | |
116 | ||
117 | update_scroll(); | |
118 | _ruler->update(); | |
119 | _viewport->update(); | |
120 | } | |
121 | ||
122 | void View::update_scroll() | |
123 | { | |
124 | assert(_viewport); | |
125 | ||
126 | const QSize areaSize = _viewport->size(); | |
127 | ||
128 | // Set the horizontal scroll bar | |
129 | double length = 0, offset = 0; | |
130 | const shared_ptr<SignalData> sig_data = _session.get_data(); | |
131 | if(sig_data) { | |
132 | length = _data_length / | |
133 | (sig_data->get_samplerate() * _scale); | |
134 | offset = _offset / _scale; | |
135 | } | |
136 | ||
137 | horizontalScrollBar()->setPageStep(areaSize.width()); | |
138 | horizontalScrollBar()->setRange(0, | |
139 | max((int)(length - areaSize.width()), 0)); | |
140 | horizontalScrollBar()->setSliderPosition(offset); | |
141 | ||
142 | // Set the vertical scrollbar | |
143 | verticalScrollBar()->setPageStep(areaSize.height()); | |
144 | verticalScrollBar()->setRange(0, | |
145 | _viewport->get_total_height() - areaSize.height()); | |
146 | } | |
147 | ||
148 | bool View::viewportEvent(QEvent *e) | |
149 | { | |
150 | switch(e->type()) { | |
151 | case QEvent::Paint: | |
152 | case QEvent::MouseButtonPress: | |
153 | case QEvent::MouseButtonRelease: | |
154 | case QEvent::MouseButtonDblClick: | |
155 | case QEvent::MouseMove: | |
156 | case QEvent::Wheel: | |
157 | return false; | |
158 | ||
159 | default: | |
160 | return QAbstractScrollArea::viewportEvent(e); | |
161 | } | |
162 | } | |
163 | ||
164 | void View::resizeEvent(QResizeEvent *e) | |
165 | { | |
166 | _ruler->setGeometry(_viewport->x(), 0, | |
167 | _viewport->width(), _viewport->y()); | |
168 | _header->setGeometry(0, _viewport->y(), | |
169 | _viewport->x(), _viewport->height()); | |
170 | update_scroll(); | |
171 | } | |
172 | ||
173 | void View::h_scroll_value_changed(int value) | |
174 | { | |
175 | _offset = _scale * value; | |
176 | _ruler->update(); | |
177 | _viewport->update(); | |
178 | } | |
179 | ||
180 | void View::v_scroll_value_changed(int value) | |
181 | { | |
182 | _v_offset = value; | |
183 | _header->update(); | |
184 | _viewport->update(); | |
185 | } | |
186 | ||
187 | void View::data_updated() | |
188 | { | |
189 | // Get the new data length | |
190 | _data_length = 0; | |
191 | shared_ptr<LogicData> sig_data = _session.get_data(); | |
192 | if(sig_data) { | |
193 | deque< shared_ptr<LogicDataSnapshot> > &snapshots = | |
194 | sig_data->get_snapshots(); | |
195 | BOOST_FOREACH(shared_ptr<LogicDataSnapshot> s, snapshots) | |
196 | if(s) | |
197 | _data_length = max(_data_length, | |
198 | s->get_sample_count()); | |
199 | } | |
200 | ||
201 | // Update the scroll bars | |
202 | update_scroll(); | |
203 | ||
204 | // Repaint the view | |
205 | _viewport->update(); | |
206 | } | |
207 | ||
208 | } // namespace view | |
209 | } // namespace pv |