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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 <cassert> | |
22 | ||
23 | #include "view.h" | |
24 | #include "viewport.h" | |
25 | ||
26 | #include "signal.h" | |
27 | #include "../sigsession.h" | |
28 | ||
29 | #include <QMouseEvent> | |
30 | ||
31 | using std::max; | |
32 | using std::min; | |
33 | using std::shared_ptr; | |
34 | using std::vector; | |
35 | ||
36 | namespace pv { | |
37 | namespace view { | |
38 | ||
39 | Viewport::Viewport(View &parent) : | |
40 | QWidget(&parent), | |
41 | _view(parent) | |
42 | { | |
43 | setMouseTracking(true); | |
44 | setAutoFillBackground(true); | |
45 | setBackgroundRole(QPalette::Base); | |
46 | ||
47 | connect(&_view.session(), SIGNAL(signals_changed()), | |
48 | this, SLOT(on_signals_changed())); | |
49 | ||
50 | connect(&_view, SIGNAL(signals_moved()), | |
51 | this, SLOT(on_signals_moved())); | |
52 | ||
53 | // Trigger the initial event manually. The default device has signals | |
54 | // which were created before this object came into being | |
55 | on_signals_changed(); | |
56 | } | |
57 | ||
58 | int Viewport::get_total_height() const | |
59 | { | |
60 | int h = 0; | |
61 | const vector< shared_ptr<Trace> > traces(_view.get_traces()); | |
62 | for (const shared_ptr<Trace> t : traces) { | |
63 | assert(t); | |
64 | h = max(t->get_v_offset() + View::SignalHeight, h); | |
65 | } | |
66 | ||
67 | return h; | |
68 | } | |
69 | ||
70 | void Viewport::paintEvent(QPaintEvent*) | |
71 | { | |
72 | const vector< shared_ptr<Trace> > traces(_view.get_traces()); | |
73 | ||
74 | QPainter p(this); | |
75 | p.setRenderHint(QPainter::Antialiasing); | |
76 | ||
77 | if (_view.cursors_shown()) | |
78 | _view.cursors().draw_viewport_background(p, rect()); | |
79 | ||
80 | // Plot the signal | |
81 | for (const shared_ptr<Trace> t : traces) | |
82 | { | |
83 | assert(t); | |
84 | t->paint_back(p, 0, width()); | |
85 | } | |
86 | ||
87 | for (const shared_ptr<Trace> t : traces) | |
88 | t->paint_mid(p, 0, width()); | |
89 | ||
90 | for (const shared_ptr<Trace> t : traces) | |
91 | t->paint_fore(p, 0, width()); | |
92 | ||
93 | if (_view.cursors_shown()) | |
94 | _view.cursors().draw_viewport_foreground(p, rect()); | |
95 | ||
96 | p.end(); | |
97 | } | |
98 | ||
99 | void Viewport::mousePressEvent(QMouseEvent *event) | |
100 | { | |
101 | assert(event); | |
102 | ||
103 | _mouse_down_point = event->pos(); | |
104 | _mouse_down_offset = _view.offset(); | |
105 | } | |
106 | ||
107 | void Viewport::mouseMoveEvent(QMouseEvent *event) | |
108 | { | |
109 | assert(event); | |
110 | ||
111 | if (event->buttons() & Qt::LeftButton) | |
112 | { | |
113 | _view.set_scale_offset(_view.scale(), | |
114 | _mouse_down_offset + | |
115 | (_mouse_down_point - event->pos()).x() * | |
116 | _view.scale()); | |
117 | } | |
118 | } | |
119 | ||
120 | void Viewport::mouseDoubleClickEvent(QMouseEvent *event) | |
121 | { | |
122 | assert(event); | |
123 | ||
124 | if (event->buttons() & Qt::LeftButton) | |
125 | _view.zoom(2.0, event->x()); | |
126 | else if (event->buttons() & Qt::RightButton) | |
127 | _view.zoom(-2.0, event->x()); | |
128 | } | |
129 | ||
130 | void Viewport::wheelEvent(QWheelEvent *event) | |
131 | { | |
132 | assert(event); | |
133 | ||
134 | if (event->orientation() == Qt::Vertical) { | |
135 | // Vertical scrolling is interpreted as zooming in/out | |
136 | _view.zoom(event->delta() / 120, event->x()); | |
137 | } else if (event->orientation() == Qt::Horizontal) { | |
138 | // Horizontal scrolling is interpreted as moving left/right | |
139 | _view.set_scale_offset(_view.scale(), | |
140 | event->delta() * _view.scale() | |
141 | + _view.offset()); | |
142 | } | |
143 | } | |
144 | ||
145 | void Viewport::on_signals_changed() | |
146 | { | |
147 | const vector< shared_ptr<Trace> > traces(_view.get_traces()); | |
148 | for (shared_ptr<Trace> t : traces) { | |
149 | assert(t); | |
150 | connect(t.get(), SIGNAL(visibility_changed()), | |
151 | this, SLOT(update())); | |
152 | } | |
153 | } | |
154 | ||
155 | void Viewport::on_signals_moved() | |
156 | { | |
157 | update(); | |
158 | } | |
159 | ||
160 | } // namespace view | |
161 | } // namespace pv |