2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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
25 #include "../sigsession.h"
27 #include <QMouseEvent>
29 #include <boost/foreach.hpp>
31 using namespace boost;
37 Viewport::Viewport(View &parent) :
41 setMouseTracking(true);
42 setAutoFillBackground(true);
43 setBackgroundRole(QPalette::Base);
45 connect(&_view, SIGNAL(signals_moved()),
46 this, SLOT(on_signals_moved()));
49 int Viewport::get_total_height() const
52 const vector< shared_ptr<Signal> > sigs(
53 _view.session().get_signals());
54 BOOST_FOREACH(const shared_ptr<Signal> s, sigs) {
56 h = max(s->get_v_offset() + View::SignalHeight, h);
62 void Viewport::paintEvent(QPaintEvent*)
64 const vector< shared_ptr<Signal> > sigs(
65 _view.session().get_signals());
68 p.setRenderHint(QPainter::Antialiasing);
70 if (_view.cursors_shown())
71 _view.cursors().draw_viewport_background(p, rect());
74 const int v_offset = _view.v_offset();
75 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
78 s->paint(p, s->get_v_offset() - v_offset, 0, width(),
79 _view.scale(), _view.offset());
82 if (_view.cursors_shown())
83 _view.cursors().draw_viewport_foreground(p, rect());
88 void Viewport::mousePressEvent(QMouseEvent *event)
92 _mouse_down_point = event->pos();
93 _mouse_down_offset = _view.offset();
96 void Viewport::mouseMoveEvent(QMouseEvent *event)
100 if (event->buttons() & Qt::LeftButton)
102 _view.set_scale_offset(_view.scale(),
104 (_mouse_down_point - event->pos()).x() *
109 void Viewport::wheelEvent(QWheelEvent *event)
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()
124 void Viewport::on_signals_moved()