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 "pv/sigsession.h"
38 #include "pv/data/logic.h"
39 #include "pv/data/logicsnapshot.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)),
73 _updating_scroll(false),
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)));
83 connect(&_session, SIGNAL(signals_changed()),
84 this, SLOT(signals_changed()));
85 connect(&_session, SIGNAL(data_updated()),
86 this, SLOT(data_updated()));
88 connect(_cursors.first().get(), SIGNAL(time_changed()),
89 this, SLOT(marker_time_changed()));
90 connect(_cursors.second().get(), SIGNAL(time_changed()),
91 this, SLOT(marker_time_changed()));
93 connect(_header, SIGNAL(signals_moved()),
94 this, SLOT(on_signals_moved()));
96 connect(_header, SIGNAL(selection_changed()),
97 _ruler, SLOT(clear_selection()));
98 connect(_ruler, SIGNAL(selection_changed()),
99 _header, SLOT(clear_selection()));
101 connect(_header, SIGNAL(selection_changed()),
102 this, SIGNAL(selection_changed()));
103 connect(_ruler, SIGNAL(selection_changed()),
104 this, SIGNAL(selection_changed()));
106 setViewportMargins(LabelMarginWidth, RulerHeight, 0, 0);
107 setViewport(_viewport);
109 _viewport->installEventFilter(this);
110 _ruler->installEventFilter(this);
111 _header->installEventFilter(this);
114 SigSession& View::session()
119 double View::scale() const
124 double View::offset() const
129 int View::v_offset() const
134 void View::zoom(double steps)
136 zoom(steps, (width() - LabelMarginWidth) / 2);
139 void View::zoom(double steps, int offset)
141 const double cursor_offset = _offset + _scale * offset;
142 _scale *= pow(3.0/2.0, -steps);
143 _scale = max(min(_scale, MaxScale), MinScale);
144 _offset = cursor_offset - _scale * offset;
152 void View::set_scale_offset(double scale, double offset)
162 bool View::cursors_shown() const
164 return _show_cursors;
167 void View::show_cursors(bool show)
169 _show_cursors = show;
174 void View::centre_cursors()
176 const double time_width = _scale * _viewport->width();
177 _cursors.first()->set_time(_offset + time_width * 0.4);
178 _cursors.second()->set_time(_offset + time_width * 0.6);
183 CursorPair& View::cursors()
188 const CursorPair& View::cursors() const
193 const QPoint& View::hover_point() const
198 void View::normalize_layout()
200 const vector< shared_ptr<Signal> > sigs(_session.get_signals());
203 BOOST_FOREACH(const shared_ptr<Signal> s, sigs)
204 v_min = min(s->get_v_offset(), v_min);
206 const int delta = -min(v_min, 0);
207 BOOST_FOREACH(shared_ptr<Signal> s, sigs)
208 s->set_v_offset(s->get_v_offset() + delta);
210 verticalScrollBar()->setSliderPosition(_v_offset + delta);
211 v_scroll_value_changed(verticalScrollBar()->sliderPosition());
214 void View::get_scroll_layout(double &length, double &offset) const
216 const shared_ptr<data::SignalData> sig_data = _session.get_data();
220 length = _data_length / (sig_data->get_samplerate() * _scale);
221 offset = _offset / _scale;
224 void View::update_scroll()
228 const QSize areaSize = _viewport->size();
230 // Set the horizontal scroll bar
231 double length = 0, offset = 0;
232 get_scroll_layout(length, offset);
233 length = max(length - areaSize.width(), 0.0);
235 horizontalScrollBar()->setPageStep(areaSize.width() / 2);
237 _updating_scroll = true;
239 if (length < MaxScrollValue) {
240 horizontalScrollBar()->setRange(0, length);
241 horizontalScrollBar()->setSliderPosition(offset);
243 horizontalScrollBar()->setRange(0, MaxScrollValue);
244 horizontalScrollBar()->setSliderPosition(
245 _offset * MaxScrollValue / (_scale * length));
248 _updating_scroll = false;
250 // Set the vertical scrollbar
251 verticalScrollBar()->setPageStep(areaSize.height());
252 verticalScrollBar()->setRange(0,
253 _viewport->get_total_height() + SignalMargin -
257 void View::reset_signal_layout()
259 int offset = SignalMargin + SignalHeight;
260 const vector< shared_ptr<Signal> > sigs(_session.get_signals());
261 BOOST_FOREACH(shared_ptr<Signal> s, sigs) {
262 s->set_v_offset(offset);
263 offset += SignalHeight + 2 * SignalMargin;
269 bool View::eventFilter(QObject *object, QEvent *event)
271 const QEvent::Type type = event->type();
272 if (type == QEvent::MouseMove) {
274 const QMouseEvent *const mouse_event = (QMouseEvent*)event;
275 if (object == _viewport)
276 _hover_point = mouse_event->pos();
277 else if (object == _ruler)
278 _hover_point = QPoint(mouse_event->x(), 0);
279 else if (object == _header)
280 _hover_point = QPoint(0, mouse_event->y());
282 _hover_point = QPoint(-1, -1);
284 hover_point_changed();
286 } else if (type == QEvent::Leave) {
287 _hover_point = QPoint(-1, -1);
288 hover_point_changed();
291 return QObject::eventFilter(object, event);
294 bool View::viewportEvent(QEvent *e)
298 case QEvent::MouseButtonPress:
299 case QEvent::MouseButtonRelease:
300 case QEvent::MouseButtonDblClick:
301 case QEvent::MouseMove:
306 return QAbstractScrollArea::viewportEvent(e);
310 void View::resizeEvent(QResizeEvent*)
312 _ruler->setGeometry(_viewport->x(), 0,
313 _viewport->width(), _viewport->y());
314 _header->setGeometry(0, _viewport->y(),
315 _viewport->x(), _viewport->height());
319 void View::h_scroll_value_changed(int value)
321 if (_updating_scroll)
324 const int range = horizontalScrollBar()->maximum();
325 if (range < MaxScrollValue)
326 _offset = _scale * value;
328 double length = 0, offset;
329 get_scroll_layout(length, offset);
330 _offset = _scale * length * value / MaxScrollValue;
337 void View::v_scroll_value_changed(int value)
344 void View::signals_changed()
346 reset_signal_layout();
349 void View::data_updated()
351 // Get the new data length
353 shared_ptr<data::Logic> sig_data = _session.get_data();
355 deque< shared_ptr<data::LogicSnapshot> > &snapshots =
356 sig_data->get_snapshots();
357 BOOST_FOREACH(shared_ptr<data::LogicSnapshot> s, snapshots)
359 _data_length = max(_data_length,
360 s->get_sample_count());
363 // Update the scroll bars
370 void View::marker_time_changed()
376 void View::on_signals_moved()