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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 "view.h" | |
22 | #include "viewport.h" | |
23 | ||
24 | #include "../../sigsession.h" | |
25 | #include "../../signal.h" | |
26 | ||
27 | #include <QMouseEvent> | |
28 | ||
29 | #include <boost/foreach.hpp> | |
30 | ||
31 | using namespace boost; | |
32 | using namespace std; | |
33 | ||
34 | namespace pv { | |
35 | namespace view { | |
36 | ||
37 | Viewport::Viewport(View &parent) : | |
38 | QGLWidget(&parent), | |
39 | _view(parent) | |
40 | { | |
41 | setMouseTracking(true); | |
42 | setAutoFillBackground(false); | |
43 | } | |
44 | ||
45 | int Viewport::get_total_height() const | |
46 | { | |
47 | int height = 0; | |
48 | BOOST_FOREACH(const shared_ptr<Signal> s, | |
49 | _view.session().get_signals()) { | |
50 | assert(s); | |
51 | height += View::SignalHeight; | |
52 | } | |
53 | ||
54 | return height; | |
55 | } | |
56 | ||
57 | void Viewport::initializeGL() | |
58 | { | |
59 | } | |
60 | ||
61 | void Viewport::resizeGL(int width, int height) | |
62 | { | |
63 | setup_viewport(width, height); | |
64 | } | |
65 | ||
66 | void Viewport::paintEvent(QPaintEvent *event) | |
67 | { | |
68 | int offset; | |
69 | ||
70 | const vector< shared_ptr<Signal> > &sigs = | |
71 | _view.session().get_signals(); | |
72 | ||
73 | // Prepare for OpenGL rendering | |
74 | makeCurrent(); | |
75 | glMatrixMode(GL_MODELVIEW); | |
76 | glPushMatrix(); | |
77 | ||
78 | setup_viewport(width(), height()); | |
79 | ||
80 | qglClearColor(Qt::white); | |
81 | glClear(GL_COLOR_BUFFER_BIT); | |
82 | ||
83 | // Plot the signal | |
84 | glEnable(GL_SCISSOR_TEST); | |
85 | glScissor(0, 0, width(), height()); | |
86 | offset = -_view.v_offset(); | |
87 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) | |
88 | { | |
89 | assert(s); | |
90 | ||
91 | const QRect signal_rect(0, offset, | |
92 | width(), View::SignalHeight); | |
93 | ||
94 | s->paint(*this, signal_rect, _view.scale(), _view.offset()); | |
95 | ||
96 | offset += View::SignalHeight; | |
97 | } | |
98 | ||
99 | glDisable(GL_SCISSOR_TEST); | |
100 | ||
101 | // Prepare for QPainter rendering | |
102 | glMatrixMode(GL_MODELVIEW); | |
103 | glPopMatrix(); | |
104 | ||
105 | QPainter painter(this); | |
106 | painter.end(); | |
107 | } | |
108 | ||
109 | void Viewport::mousePressEvent(QMouseEvent *event) | |
110 | { | |
111 | assert(event); | |
112 | ||
113 | _mouse_down_point = event->pos(); | |
114 | _mouse_down_offset = _view.offset(); | |
115 | } | |
116 | ||
117 | void Viewport::mouseMoveEvent(QMouseEvent *event) | |
118 | { | |
119 | assert(event); | |
120 | ||
121 | if(event->buttons() & Qt::LeftButton) | |
122 | { | |
123 | _view.set_scale_offset(_view.scale(), | |
124 | _mouse_down_offset + | |
125 | (_mouse_down_point - event->pos()).x() * | |
126 | _view.scale()); | |
127 | } | |
128 | } | |
129 | ||
130 | void Viewport::mouseReleaseEvent(QMouseEvent *event) | |
131 | { | |
132 | assert(event); | |
133 | } | |
134 | ||
135 | void Viewport::wheelEvent(QWheelEvent *event) | |
136 | { | |
137 | assert(event); | |
138 | _view.zoom(event->delta() / 120, event->x()); | |
139 | } | |
140 | ||
141 | void Viewport::setup_viewport(int width, int height) | |
142 | { | |
143 | glViewport(0, 0, (GLint)width, (GLint)height); | |
144 | glMatrixMode(GL_PROJECTION); | |
145 | glLoadIdentity(); | |
146 | glOrtho(0, width, height, 0, -1, 1); | |
147 | glMatrixMode(GL_MODELVIEW); | |
148 | } | |
149 | ||
150 | } // namespace view | |
151 | } // namespace pv |