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 <boost/foreach.hpp>
28 #include <QMouseEvent>
37 #include "../logicdata.h"
38 #include "../logicdatasnapshot.h"
39 #include "../sigsession.h"
41 using namespace boost;
47 const double View::MaxScale = 1e9;
48 const double View::MinScale = 1e-15;
50 const int View::LabelMarginWidth = 70;
51 const int View::RulerHeight = 30;
53 const int View::MaxScrollValue = INT_MAX / 2;
55 const int View::SignalHeight = 30;
56 const int View::SignalMargin = 10;
57 const int View::SignalSnapGridSize = 10;
59 const QColor View::CursorAreaColour(220, 231, 243);
61 const QSizeF View::LabelPadding(4, 0);
63 View::View(SigSession &session, QWidget *parent) :
64 QAbstractScrollArea(parent),
66 _viewport(new Viewport(*this)),
67 _ruler(new Ruler(*this)),
68 _header(new Header(*this)),
74 _cursors(pair<Cursor, Cursor>(Cursor(*this, 0.0),
78 connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
79 this, SLOT(h_scroll_value_changed(int)));
80 connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
81 this, SLOT(v_scroll_value_changed(int)));
82 connect(&_session, SIGNAL(data_updated()),
83 this, SLOT(data_updated()));
85 connect(&_cursors.first, SIGNAL(time_changed()),
86 this, SLOT(marker_time_changed()));
87 connect(&_cursors.second, SIGNAL(time_changed()),
88 this, SLOT(marker_time_changed()));
90 connect(_header, SIGNAL(signals_moved()),
91 this, SLOT(on_signals_moved()));
93 setViewportMargins(LabelMarginWidth, RulerHeight, 0, 0);
94 setViewport(_viewport);
96 _viewport->installEventFilter(this);
97 _ruler->installEventFilter(this);
98 _header->installEventFilter(this);
101 SigSession& View::session()
106 double View::scale() const
111 double View::offset() const
116 int View::v_offset() const
121 void View::zoom(double steps)
123 zoom(steps, (width() - LabelMarginWidth) / 2);
126 void View::zoom(double steps, int offset)
128 const double cursor_offset = _offset + _scale * offset;
129 _scale *= pow(3.0/2.0, -steps);
130 _scale = max(min(_scale, MaxScale), MinScale);
131 _offset = cursor_offset - _scale * offset;
139 void View::set_scale_offset(double scale, double offset)
149 bool View::cursors_shown() const
151 return _show_cursors;
154 void View::show_cursors(bool show)
156 _show_cursors = show;
161 std::pair<Cursor, Cursor>& View::cursors()
166 const QPoint& View::hover_point() const
171 void View::get_scroll_layout(double &length, double &offset) const
173 const shared_ptr<SignalData> sig_data = _session.get_data();
177 length = _data_length / (sig_data->get_samplerate() * _scale);
178 offset = _offset / _scale;
181 void View::update_scroll()
185 const QSize areaSize = _viewport->size();
187 // Set the horizontal scroll bar
188 double length = 0, offset = 0;
189 get_scroll_layout(length, offset);
190 length = max(length - areaSize.width(), 0.0);
192 horizontalScrollBar()->setPageStep(areaSize.width());
194 if(length < MaxScrollValue) {
195 horizontalScrollBar()->setRange(0, length);
196 horizontalScrollBar()->setSliderPosition(offset);
198 horizontalScrollBar()->setRange(0, MaxScrollValue);
199 horizontalScrollBar()->setSliderPosition(
200 _offset * MaxScrollValue / (_scale * length));
203 // Set the vertical scrollbar
204 verticalScrollBar()->setPageStep(areaSize.height());
205 verticalScrollBar()->setRange(0,
206 _viewport->get_total_height() - areaSize.height());
209 void View::reset_signal_layout()
211 int offset = SignalMargin;
212 vector< shared_ptr<Signal> > &sigs = _session.get_signals();
213 BOOST_FOREACH(shared_ptr<Signal> s, sigs) {
214 s->set_v_offset(offset);
215 offset += SignalHeight + 2 * SignalMargin;
219 bool View::eventFilter(QObject *object, QEvent *event)
221 const QEvent::Type type = event->type();
222 if(type == QEvent::MouseMove) {
224 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
225 if(object == _viewport)
226 _hover_point = mouse_event->pos();
227 else if(object == _ruler)
228 _hover_point = QPoint(mouse_event->x(), 0);
229 else if(object == _header)
230 _hover_point = QPoint(0, mouse_event->y());
232 _hover_point = QPoint(-1, -1);
234 hover_point_changed();
236 } else if(type == QEvent::Leave) {
237 _hover_point = QPoint(-1, -1);
238 hover_point_changed();
241 return QObject::eventFilter(object, event);
244 bool View::viewportEvent(QEvent *e)
248 case QEvent::MouseButtonPress:
249 case QEvent::MouseButtonRelease:
250 case QEvent::MouseButtonDblClick:
251 case QEvent::MouseMove:
256 return QAbstractScrollArea::viewportEvent(e);
260 void View::resizeEvent(QResizeEvent *e)
262 _ruler->setGeometry(_viewport->x(), 0,
263 _viewport->width(), _viewport->y());
264 _header->setGeometry(0, _viewport->y(),
265 _viewport->x(), _viewport->height());
269 void View::h_scroll_value_changed(int value)
271 const int range = horizontalScrollBar()->maximum();
272 if(range < MaxScrollValue)
273 _offset = _scale * value;
275 double length = 0, offset;
276 get_scroll_layout(length, offset);
277 _offset = _scale * length * value / MaxScrollValue;
284 void View::v_scroll_value_changed(int value)
291 void View::data_updated()
293 // Get the new data length
295 shared_ptr<LogicData> sig_data = _session.get_data();
297 deque< shared_ptr<LogicDataSnapshot> > &snapshots =
298 sig_data->get_snapshots();
299 BOOST_FOREACH(shared_ptr<LogicDataSnapshot> s, snapshots)
301 _data_length = max(_data_length,
302 s->get_sample_count());
305 // Update the scroll bars
311 /// @todo: Call this only once when the signals are first created.
312 reset_signal_layout();
315 void View::marker_time_changed()
321 void View::on_signals_moved()