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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 | #include "view.h" | |
22 | #include "viewport.h" | |
23 | ||
24 | #include "signal.h" | |
25 | #include "../sigsession.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 | QWidget(&parent), | |
39 | _view(parent) | |
40 | { | |
41 | setMouseTracking(true); | |
42 | setAutoFillBackground(true); | |
43 | setBackgroundRole(QPalette::Base); | |
44 | ||
45 | connect(&_view, SIGNAL(signals_moved()), | |
46 | this, SLOT(on_signals_moved())); | |
47 | } | |
48 | ||
49 | int Viewport::get_total_height() const | |
50 | { | |
51 | int h = 0; | |
52 | const vector< shared_ptr<Signal> > sigs( | |
53 | _view.session().get_signals()); | |
54 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) { | |
55 | assert(s); | |
56 | h = max(s->get_v_offset() + View::SignalHeight, h); | |
57 | } | |
58 | ||
59 | return h; | |
60 | } | |
61 | ||
62 | void Viewport::paintEvent(QPaintEvent*) | |
63 | { | |
64 | const vector< shared_ptr<Signal> > sigs( | |
65 | _view.session().get_signals()); | |
66 | ||
67 | QPainter p(this); | |
68 | p.setRenderHint(QPainter::Antialiasing); | |
69 | ||
70 | if (_view.cursors_shown()) | |
71 | _view.cursors().draw_viewport_background(p, rect()); | |
72 | ||
73 | // Plot the signal | |
74 | const int v_offset = _view.v_offset(); | |
75 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) | |
76 | { | |
77 | assert(s); | |
78 | s->paint(p, s->get_v_offset() - v_offset, 0, width(), | |
79 | _view.scale(), _view.offset()); | |
80 | } | |
81 | ||
82 | if (_view.cursors_shown()) | |
83 | _view.cursors().draw_viewport_foreground(p, rect()); | |
84 | ||
85 | p.end(); | |
86 | } | |
87 | ||
88 | void Viewport::mousePressEvent(QMouseEvent *event) | |
89 | { | |
90 | assert(event); | |
91 | ||
92 | _mouse_down_point = event->pos(); | |
93 | _mouse_down_offset = _view.offset(); | |
94 | } | |
95 | ||
96 | void Viewport::mouseMoveEvent(QMouseEvent *event) | |
97 | { | |
98 | assert(event); | |
99 | ||
100 | if (event->buttons() & Qt::LeftButton) | |
101 | { | |
102 | _view.set_scale_offset(_view.scale(), | |
103 | _mouse_down_offset + | |
104 | (_mouse_down_point - event->pos()).x() * | |
105 | _view.scale()); | |
106 | } | |
107 | } | |
108 | ||
109 | void Viewport::wheelEvent(QWheelEvent *event) | |
110 | { | |
111 | assert(event); | |
112 | ||
113 | if (event->orientation() == Qt::Vertical) { | |
114 | // Vertical scrolling is interpreted as zooming in/out | |
115 | _view.zoom(event->delta() / 120, event->x()); | |
116 | } else if (event->orientation() == Qt::Horizontal) { | |
117 | // Horizontal scrolling is interpreted as moving left/right | |
118 | _view.set_scale_offset(_view.scale(), | |
119 | event->delta() * _view.scale() | |
120 | + _view.offset()); | |
121 | } | |
122 | } | |
123 | ||
124 | void Viewport::on_signals_moved() | |
125 | { | |
126 | update(); | |
127 | } | |
128 | ||
129 | } // namespace view | |
130 | } // namespace pv |