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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 "sigview.h" | |
22 | ||
23 | #include "sigsession.h" | |
24 | #include "signal.h" | |
25 | ||
26 | #include <QMouseEvent> | |
27 | ||
28 | #include <boost/foreach.hpp> | |
29 | ||
30 | using namespace boost; | |
31 | using namespace std; | |
32 | ||
33 | const int SigView::SignalHeight = 50; | |
34 | const int SigView::LabelMarginWidth = 70; | |
35 | ||
36 | SigView::SigView(SigSession &session, QWidget *parent) : | |
37 | QGLWidget(parent), | |
38 | _session(session), | |
39 | _scale(1e-6), | |
40 | _offset(0) | |
41 | { | |
42 | connect(&_session, SIGNAL(dataUpdated()), | |
43 | this, SLOT(dataUpdated())); | |
44 | ||
45 | setMouseTracking(true); | |
46 | setAutoFillBackground(false); | |
47 | } | |
48 | ||
49 | void SigView::initializeGL() | |
50 | { | |
51 | } | |
52 | ||
53 | void SigView::resizeGL(int width, int height) | |
54 | { | |
55 | setupViewport(width, height); | |
56 | } | |
57 | ||
58 | void SigView::paintEvent(QPaintEvent *event) | |
59 | { | |
60 | int offset; | |
61 | ||
62 | const vector< shared_ptr<Signal> > &sigs = | |
63 | _session.get_signals(); | |
64 | ||
65 | // Prepare for OpenGL rendering | |
66 | makeCurrent(); | |
67 | glMatrixMode(GL_MODELVIEW); | |
68 | glPushMatrix(); | |
69 | ||
70 | setupViewport(width(), height()); | |
71 | ||
72 | qglClearColor(Qt::white); | |
73 | glClear(GL_COLOR_BUFFER_BIT); | |
74 | ||
75 | // Plot the signal | |
76 | offset = 0; | |
77 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) | |
78 | { | |
79 | assert(s); | |
80 | ||
81 | const QRect signal_rect(LabelMarginWidth, offset, | |
82 | width() - LabelMarginWidth, SignalHeight); | |
83 | ||
84 | s->paint(*this, signal_rect, _scale, _offset); | |
85 | ||
86 | offset += SignalHeight; | |
87 | } | |
88 | ||
89 | // Prepare for QPainter rendering | |
90 | glMatrixMode(GL_MODELVIEW); | |
91 | glPopMatrix(); | |
92 | ||
93 | QPainter painter(this); | |
94 | painter.setRenderHint(QPainter::Antialiasing); | |
95 | ||
96 | // Paint the label | |
97 | offset = 0; | |
98 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) | |
99 | { | |
100 | assert(s); | |
101 | ||
102 | const QRect label_rect(0, offset, | |
103 | LabelMarginWidth, SignalHeight); | |
104 | s->paint_label(painter, label_rect); | |
105 | ||
106 | offset += SignalHeight; | |
107 | } | |
108 | ||
109 | painter.end(); | |
110 | } | |
111 | ||
112 | void SigView::dataUpdated() | |
113 | { | |
114 | update(); | |
115 | } | |
116 | ||
117 | void SigView::mouseMoveEvent(QMouseEvent *event) | |
118 | { | |
119 | assert(event); | |
120 | } | |
121 | ||
122 | void SigView::mousePressEvent(QMouseEvent *event) | |
123 | { | |
124 | assert(event); | |
125 | } | |
126 | ||
127 | void SigView::mouseReleaseEvent(QMouseEvent *event) | |
128 | { | |
129 | assert(event); | |
130 | ||
131 | const double cursor_offset = _offset + _scale * (double)event->x(); | |
132 | ||
133 | switch(event->button()) | |
134 | { | |
135 | case Qt::LeftButton: | |
136 | _scale *= 2.0 / 3.0; | |
137 | break; | |
138 | ||
139 | case Qt::RightButton: | |
140 | _scale *= 3.0 / 2.0; | |
141 | break; | |
142 | } | |
143 | ||
144 | _offset = cursor_offset - _scale * (double)event->x(); | |
145 | ||
146 | update(); | |
147 | } | |
148 | ||
149 | void SigView::setupViewport(int width, int height) | |
150 | { | |
151 | glViewport(0, 0, (GLint)width, (GLint)height); | |
152 | glMatrixMode(GL_PROJECTION); | |
153 | glLoadIdentity(); | |
154 | glOrtho(0, width, height, 0, -1, 1); | |
155 | glMatrixMode(GL_MODELVIEW); | |
156 | } |