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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 | draw_cursors_background(p); | |
71 | ||
72 | // Plot the signal | |
73 | const int v_offset = _view.v_offset(); | |
74 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) | |
75 | { | |
76 | assert(s); | |
77 | s->paint(p, s->get_v_offset() - v_offset, 0, width(), | |
78 | _view.scale(), _view.offset()); | |
79 | } | |
80 | ||
81 | draw_cursors_foreground(p); | |
82 | ||
83 | p.end(); | |
84 | } | |
85 | ||
86 | void Viewport::mousePressEvent(QMouseEvent *event) | |
87 | { | |
88 | assert(event); | |
89 | ||
90 | _mouse_down_point = event->pos(); | |
91 | _mouse_down_offset = _view.offset(); | |
92 | } | |
93 | ||
94 | void Viewport::mouseMoveEvent(QMouseEvent *event) | |
95 | { | |
96 | assert(event); | |
97 | ||
98 | if (event->buttons() & Qt::LeftButton) | |
99 | { | |
100 | _view.set_scale_offset(_view.scale(), | |
101 | _mouse_down_offset + | |
102 | (_mouse_down_point - event->pos()).x() * | |
103 | _view.scale()); | |
104 | } | |
105 | } | |
106 | ||
107 | void Viewport::wheelEvent(QWheelEvent *event) | |
108 | { | |
109 | assert(event); | |
110 | ||
111 | if (event->orientation() == Qt::Vertical) { | |
112 | // Vertical scrolling is interpreted as zooming in/out | |
113 | _view.zoom(event->delta() / 120, event->x()); | |
114 | } else if (event->orientation() == Qt::Horizontal) { | |
115 | // Horizontal scrolling is interpreted as moving left/right | |
116 | _view.set_scale_offset(_view.scale(), | |
117 | event->delta() * _view.scale() | |
118 | + _view.offset()); | |
119 | } | |
120 | } | |
121 | ||
122 | void Viewport::draw_cursors_background(QPainter &p) | |
123 | { | |
124 | if (!_view.cursors_shown()) | |
125 | return; | |
126 | ||
127 | p.setPen(Qt::NoPen); | |
128 | p.setBrush(QBrush(View::CursorAreaColour)); | |
129 | ||
130 | const pair<Cursor, Cursor> &c = _view.cursors(); | |
131 | const float x1 = (c.first.time() - _view.offset()) / _view.scale(); | |
132 | const float x2 = (c.second.time() - _view.offset()) / _view.scale(); | |
133 | const int l = (int)max(min(x1, x2), 0.0f); | |
134 | const int r = (int)min(max(x1, x2), (float)width()); | |
135 | ||
136 | p.drawRect(l, 0, r - l, height()); | |
137 | } | |
138 | ||
139 | void Viewport::draw_cursors_foreground(QPainter &p) | |
140 | { | |
141 | if (!_view.cursors_shown()) | |
142 | return; | |
143 | ||
144 | const QRect r = rect(); | |
145 | pair<Cursor, Cursor> &cursors = _view.cursors(); | |
146 | cursors.first.paint(p, r); | |
147 | cursors.second.paint(p, r); | |
148 | } | |
149 | ||
150 | void Viewport::on_signals_moved() | |
151 | { | |
152 | update(); | |
153 | } | |
154 | ||
155 | } // namespace view | |
156 | } // namespace pv |