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
29 #include "../sigsession.h"
31 #include <QMouseEvent>
36 using std::shared_ptr;
37 using std::stable_sort;
43 Viewport::Viewport(View &parent) :
46 _mouse_down_valid(false),
47 _pinch_zoom_active(false)
49 setAttribute(Qt::WA_AcceptTouchEvents, true);
51 setMouseTracking(true);
52 setAutoFillBackground(true);
53 setBackgroundRole(QPalette::Base);
55 connect(&_view.session(), SIGNAL(signals_changed()),
56 this, SLOT(on_signals_changed()));
58 connect(&_view, SIGNAL(signals_moved()),
59 this, SLOT(on_signals_moved()));
62 int Viewport::get_total_height() const
66 h = max(i->v_offset() + View::SignalHeight, h);
70 void Viewport::paintEvent(QPaintEvent*)
72 vector< shared_ptr<RowItem> > row_items(_view.begin(), _view.end());
73 stable_sort(row_items.begin(), row_items.end(),
74 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
75 return a->v_offset() < b->v_offset(); });
78 p.setRenderHint(QPainter::Antialiasing);
80 if (_view.cursors_shown())
81 _view.cursors().draw_viewport_background(p, rect());
84 for (const shared_ptr<RowItem> r : row_items)
87 r->paint_back(p, 0, width());
90 for (const shared_ptr<RowItem> r : row_items)
91 r->paint_mid(p, 0, width());
93 for (const shared_ptr<RowItem> r : row_items)
94 r->paint_fore(p, 0, width());
96 if (_view.cursors_shown())
97 _view.cursors().draw_viewport_foreground(p, rect());
102 bool Viewport::event(QEvent *event)
104 switch (event->type()) {
105 case QEvent::TouchBegin:
106 case QEvent::TouchUpdate:
107 case QEvent::TouchEnd:
108 if (touchEvent(static_cast<QTouchEvent *>(event)))
116 return QWidget::event(event);
119 void Viewport::mousePressEvent(QMouseEvent *event)
123 if (event->button() == Qt::LeftButton) {
124 _mouse_down_point = event->pos();
125 _mouse_down_offset = _view.offset();
126 _mouse_down_valid = true;
130 void Viewport::mouseReleaseEvent(QMouseEvent *event)
134 if (event->button() == Qt::LeftButton)
135 _mouse_down_valid = false;
138 void Viewport::mouseMoveEvent(QMouseEvent *event)
142 if (event->buttons() & Qt::LeftButton) {
143 if (!_mouse_down_valid) {
144 _mouse_down_point = event->pos();
145 _mouse_down_offset = _view.offset();
146 _mouse_down_valid = true;
149 _view.set_scale_offset(_view.scale(),
151 (_mouse_down_point - event->pos()).x() *
156 void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
160 if (event->buttons() & Qt::LeftButton)
161 _view.zoom(2.0, event->x());
162 else if (event->buttons() & Qt::RightButton)
163 _view.zoom(-2.0, event->x());
166 void Viewport::wheelEvent(QWheelEvent *event)
170 if (event->orientation() == Qt::Vertical) {
171 // Vertical scrolling is interpreted as zooming in/out
172 _view.zoom(event->delta() / 120, event->x());
173 } else if (event->orientation() == Qt::Horizontal) {
174 // Horizontal scrolling is interpreted as moving left/right
175 _view.set_scale_offset(_view.scale(),
176 event->delta() * _view.scale()
181 bool Viewport::touchEvent(QTouchEvent *event)
183 QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
185 if (touchPoints.count() != 2) {
186 _pinch_zoom_active = false;
190 const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
191 const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
193 if (!_pinch_zoom_active ||
194 (event->touchPointStates() & Qt::TouchPointPressed)) {
195 _pinch_offset0 = _view.offset() + _view.scale() * touchPoint0.pos().x();
196 _pinch_offset1 = _view.offset() + _view.scale() * touchPoint1.pos().x();
197 _pinch_zoom_active = true;
200 double w = touchPoint1.pos().x() - touchPoint0.pos().x();
202 double scale = (_pinch_offset1 - _pinch_offset0) / w;
205 double offset = _pinch_offset0 - touchPoint0.pos().x() * scale;
207 _view.set_scale_offset(scale, offset);
210 if (event->touchPointStates() & Qt::TouchPointReleased) {
211 _pinch_zoom_active = false;
213 if (touchPoint0.state() & Qt::TouchPointReleased) {
214 // Primary touch released
215 _mouse_down_valid = false;
217 // Update the mouse down fields so that continued
218 // dragging with the primary touch will work correctly
219 _mouse_down_point = touchPoint0.pos().toPoint();
220 _mouse_down_offset = _view.offset();
221 _mouse_down_valid = true;
228 void Viewport::on_signals_changed()
230 for (shared_ptr<RowItem> r : _view) {
232 connect(r.get(), SIGNAL(visibility_changed()),
233 this, SLOT(update()));
237 void Viewport::on_signals_moved()