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>
33 #include "../../logicdata.h"
34 #include "../../logicdatasnapshot.h"
35 #include "../../sigsession.h"
37 using namespace boost;
43 const double View::MaxScale = 1e9;
44 const double View::MinScale = 1e-15;
46 const int View::LabelMarginWidth = 70;
47 const int View::RulerHeight = 30;
49 const int View::SignalHeight = 50;
51 View::View(SigSession &session, QWidget *parent) :
52 QAbstractScrollArea(parent),
54 _viewport(new Viewport(*this)),
55 _header(new Header(*this)),
61 connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
62 this, SLOT(h_scroll_value_changed(int)));
63 connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
64 this, SLOT(v_scroll_value_changed(int)));
65 connect(&_session, SIGNAL(data_updated()),
66 this, SLOT(data_updated()));
68 setViewportMargins(LabelMarginWidth, 0, 0, 0);
69 setViewport(_viewport);
72 SigSession& View::session()
77 double View::scale() const
82 double View::offset() const
87 int View::v_offset() const
92 void View::zoom(double steps)
94 zoom(steps, (width() - LabelMarginWidth) / 2);
97 void View::set_scale_offset(double scale, double offset)
105 void View::update_scroll()
109 const QSize areaSize = _viewport->size();
111 // Set the horizontal scroll bar
112 double length = 0, offset = 0;
113 const shared_ptr<SignalData> sig_data = _session.get_data();
115 length = _data_length /
116 (sig_data->get_samplerate() * _scale);
117 offset = _offset / _scale;
120 horizontalScrollBar()->setPageStep(areaSize.width());
121 horizontalScrollBar()->setRange(0,
122 max((int)(length - areaSize.width()), 0));
123 horizontalScrollBar()->setSliderPosition(offset);
125 // Set the vertical scrollbar
126 verticalScrollBar()->setPageStep(areaSize.height());
127 verticalScrollBar()->setRange(0,
128 _viewport->get_total_height() - areaSize.height());
131 void View::zoom(double steps, int offset)
133 const double cursor_offset = _offset + _scale * offset;
134 _scale *= pow(3.0/2.0, -steps);
135 _scale = max(min(_scale, MaxScale), MinScale);
136 _offset = cursor_offset - _scale * offset;
141 bool View::viewportEvent(QEvent *e)
145 case QEvent::MouseButtonPress:
146 case QEvent::MouseButtonRelease:
147 case QEvent::MouseButtonDblClick:
148 case QEvent::MouseMove:
153 return QAbstractScrollArea::viewportEvent(e);
157 void View::resizeEvent(QResizeEvent *e)
159 _header->setGeometry(0, RulerHeight,
160 _viewport->x(), _viewport->height());
164 void View::h_scroll_value_changed(int value)
166 _offset = _scale * value;
170 void View::v_scroll_value_changed(int value)
177 void View::data_updated()
179 // Get the new data length
181 shared_ptr<LogicData> sig_data = _session.get_data();
183 deque< shared_ptr<LogicDataSnapshot> > &snapshots =
184 sig_data->get_snapshots();
185 BOOST_FOREACH(shared_ptr<LogicDataSnapshot> s, snapshots)
187 _data_length = max(_data_length,
188 s->get_sample_count());
191 // Update the scroll bars