2 * This file is part of the sigrok 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
24 #include <boost/foreach.hpp>
32 #include "../../logicdata.h"
33 #include "../../logicdatasnapshot.h"
34 #include "../../sigsession.h"
36 using namespace boost;
42 const double View::MaxScale = 1e9;
43 const double View::MinScale = 1e-15;
45 const int View::LabelMarginWidth = 70;
46 const int View::RulerHeight = 30;
48 View::View(SigSession &session, QWidget *parent) :
49 QAbstractScrollArea(parent),
51 _viewport(new Viewport(*this)),
57 connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
58 this, SLOT(h_scroll_value_changed(int)));
59 connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
60 this, SLOT(v_scroll_value_changed(int)));
61 connect(&_session, SIGNAL(data_updated()),
62 this, SLOT(data_updated()));
63 setViewport(_viewport);
66 SigSession& View::session()
71 double View::scale() const
76 double View::offset() const
81 int View::v_offset() const
86 void View::zoom(double steps)
88 zoom(steps, (width() - LabelMarginWidth) / 2);
91 void View::set_scale_offset(double scale, double offset)
99 void View::update_scroll()
103 const QSize areaSize = _viewport->size();
105 // Set the horizontal scroll bar
106 double length = 0, offset = 0;
107 const shared_ptr<SignalData> sig_data = _session.get_data();
109 length = _data_length /
110 (sig_data->get_samplerate() * _scale);
111 offset = _offset / _scale;
114 horizontalScrollBar()->setPageStep(areaSize.width());
115 horizontalScrollBar()->setRange(0,
116 max((int)(length - areaSize.width()), 0));
117 horizontalScrollBar()->setSliderPosition(offset);
119 // Set the vertical scrollbar
120 verticalScrollBar()->setPageStep(areaSize.height());
121 verticalScrollBar()->setRange(0,
122 _viewport->get_total_height() - areaSize.height());
125 void View::zoom(double steps, int offset)
127 const double cursor_offset = _offset + _scale * offset;
128 _scale *= pow(3.0/2.0, -steps);
129 _scale = max(min(_scale, MaxScale), MinScale);
130 _offset = cursor_offset - _scale * offset;
135 bool View::viewportEvent(QEvent *e)
139 case QEvent::MouseButtonPress:
140 case QEvent::MouseButtonRelease:
141 case QEvent::MouseButtonDblClick:
142 case QEvent::MouseMove:
147 return QAbstractScrollArea::viewportEvent(e);
151 void View::resizeEvent(QResizeEvent *e)
156 void View::h_scroll_value_changed(int value)
158 _offset = _scale * value;
162 void View::v_scroll_value_changed(int value)
168 void View::data_updated()
170 // Get the new data length
172 shared_ptr<LogicData> sig_data = _session.get_data();
174 deque< shared_ptr<LogicDataSnapshot> > &snapshots =
175 sig_data->get_snapshots();
176 BOOST_FOREACH(shared_ptr<LogicDataSnapshot> s, snapshots)
178 _data_length = max(_data_length,
179 s->get_sample_count());
182 // Update the scroll bars