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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 "../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 | QWidget(&parent), | |
39 | _view(parent) | |
40 | { | |
41 | setMouseTracking(true); | |
42 | setAutoFillBackground(true); | |
43 | setBackgroundRole(QPalette::Base); | |
44 | } | |
45 | ||
46 | int Viewport::get_total_height() const | |
47 | { | |
48 | int height = 0; | |
49 | BOOST_FOREACH(const shared_ptr<Signal> s, | |
50 | _view.session().get_signals()) { | |
51 | assert(s); | |
52 | height += View::SignalHeight; | |
53 | } | |
54 | ||
55 | return height; | |
56 | } | |
57 | ||
58 | void Viewport::paintEvent(QPaintEvent *event) | |
59 | { | |
60 | const vector< shared_ptr<Signal> > &sigs = | |
61 | _view.session().get_signals(); | |
62 | ||
63 | QPainter p(this); | |
64 | p.setRenderHint(QPainter::Antialiasing); | |
65 | ||
66 | draw_cursors_background(p); | |
67 | ||
68 | // Plot the signal | |
69 | int offset = -_view.v_offset(); | |
70 | BOOST_FOREACH(const shared_ptr<Signal> s, sigs) | |
71 | { | |
72 | assert(s); | |
73 | ||
74 | const QRect signal_rect(0, offset, | |
75 | width(), View::SignalHeight); | |
76 | ||
77 | s->paint(p, signal_rect, _view.scale(), _view.offset()); | |
78 | ||
79 | offset += View::SignalHeight; | |
80 | } | |
81 | ||
82 | draw_cursors_foreground(p); | |
83 | ||
84 | p.end(); | |
85 | } | |
86 | ||
87 | void Viewport::mousePressEvent(QMouseEvent *event) | |
88 | { | |
89 | assert(event); | |
90 | ||
91 | _mouse_down_point = event->pos(); | |
92 | _mouse_down_offset = _view.offset(); | |
93 | } | |
94 | ||
95 | void Viewport::mouseMoveEvent(QMouseEvent *event) | |
96 | { | |
97 | assert(event); | |
98 | ||
99 | if(event->buttons() & Qt::LeftButton) | |
100 | { | |
101 | _view.set_scale_offset(_view.scale(), | |
102 | _mouse_down_offset + | |
103 | (_mouse_down_point - event->pos()).x() * | |
104 | _view.scale()); | |
105 | } | |
106 | } | |
107 | ||
108 | void Viewport::mouseReleaseEvent(QMouseEvent *event) | |
109 | { | |
110 | assert(event); | |
111 | } | |
112 | ||
113 | void Viewport::wheelEvent(QWheelEvent *event) | |
114 | { | |
115 | assert(event); | |
116 | _view.zoom(event->delta() / 120, event->x()); | |
117 | } | |
118 | ||
119 | void Viewport::draw_cursors_background(QPainter &p) | |
120 | { | |
121 | if(!_view.cursors_shown()) | |
122 | return; | |
123 | ||
124 | p.setPen(Qt::NoPen); | |
125 | p.setBrush(QBrush(View::CursorAreaColour)); | |
126 | ||
127 | const pair<Cursor, Cursor> &c = _view.cursors(); | |
128 | const float x1 = (c.first.time() - _view.offset()) / _view.scale(); | |
129 | const float x2 = (c.second.time() - _view.offset()) / _view.scale(); | |
130 | const int l = (int)max(min(x1, x2), 0.0f); | |
131 | const int r = (int)min(max(x1, x2), (float)width()); | |
132 | ||
133 | p.drawRect(l, 0, r - l, height()); | |
134 | } | |
135 | ||
136 | void Viewport::draw_cursors_foreground(QPainter &p) | |
137 | { | |
138 | if(!_view.cursors_shown()) | |
139 | return; | |
140 | ||
141 | const QRect r = rect(); | |
142 | pair<Cursor, Cursor> &cursors = _view.cursors(); | |
143 | cursors.first.paint(p, r); | |
144 | cursors.second.paint(p, r); | |
145 | } | |
146 | ||
147 | } // namespace view | |
148 | } // namespace pv |