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
28 #include "viewitempaintparams.hpp"
29 #include "viewport.hpp"
31 #include <pv/session.hpp>
33 #include <QMouseEvent>
36 using std::back_inserter;
41 using std::numeric_limits;
42 using std::shared_ptr;
43 using std::stable_sort;
49 Viewport::Viewport(View &parent) :
51 drag_offset_(numeric_limits<double>::signaling_NaN()),
52 pinch_zoom_active_(false)
54 setAutoFillBackground(true);
55 setBackgroundRole(QPalette::Base);
58 shared_ptr<ViewItem> Viewport::get_mouse_over_item(const QPoint &pt)
60 const vector< shared_ptr<ViewItem> > items(this->items());
61 for (auto i = items.rbegin(); i != items.rend(); i++)
62 if ((*i)->enabled() &&
63 (*i)->hit_box_rect(rect()).contains(pt))
70 drag_offset_ = view_.offset();
73 void Viewport::drag_by(const QPoint &delta)
75 if (isnan(drag_offset_))
78 view_.set_scale_offset(view_.scale(), drag_offset_ -
79 delta.x() * view_.scale());
82 void Viewport::drag_release()
84 drag_offset_ = numeric_limits<double>::signaling_NaN();
87 vector< shared_ptr<ViewItem> > Viewport::items()
89 vector< shared_ptr<ViewItem> > items(view_.begin(), view_.end());
90 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
91 copy(time_items.begin(), time_items.end(), back_inserter(items));
95 bool Viewport::touch_event(QTouchEvent *event)
97 QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
99 if (touchPoints.count() != 2) {
100 pinch_zoom_active_ = false;
104 const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
105 const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
107 if (!pinch_zoom_active_ ||
108 (event->touchPointStates() & Qt::TouchPointPressed)) {
109 pinch_offset0_ = view_.offset() + view_.scale() * touchPoint0.pos().x();
110 pinch_offset1_ = view_.offset() + view_.scale() * touchPoint1.pos().x();
111 pinch_zoom_active_ = true;
114 double w = touchPoint1.pos().x() - touchPoint0.pos().x();
117 fabs((pinch_offset1_ - pinch_offset0_) / w);
118 double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
120 view_.set_scale_offset(scale, offset);
123 if (event->touchPointStates() & Qt::TouchPointReleased) {
124 pinch_zoom_active_ = false;
126 if (touchPoint0.state() & Qt::TouchPointReleased) {
127 // Primary touch released
130 // Update the mouse down fields so that continued
131 // dragging with the primary touch will work correctly
132 mouse_down_point_ = touchPoint0.pos().toPoint();
140 void Viewport::paintEvent(QPaintEvent*)
142 vector< shared_ptr<RowItem> > row_items(view_.begin(), view_.end());
143 assert(none_of(row_items.begin(), row_items.end(),
144 [](const shared_ptr<RowItem> &r) { return !r; }));
146 stable_sort(row_items.begin(), row_items.end(),
147 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
148 return a->visual_v_offset() < b->visual_v_offset(); });
150 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
151 assert(none_of(time_items.begin(), time_items.end(),
152 [](const shared_ptr<TimeItem> &t) { return !t; }));
155 p.setRenderHint(QPainter::Antialiasing);
157 const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
159 for (const shared_ptr<TimeItem> t : time_items)
160 t->paint_back(p, pp);
161 for (const shared_ptr<RowItem> r : row_items)
162 r->paint_back(p, pp);
164 for (const shared_ptr<TimeItem> t : time_items)
166 for (const shared_ptr<RowItem> r : row_items)
169 for (const shared_ptr<RowItem> r : row_items)
170 r->paint_fore(p, pp);
171 for (const shared_ptr<TimeItem> t : time_items)
172 t->paint_fore(p, pp);
177 void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
181 if (event->buttons() & Qt::LeftButton)
182 view_.zoom(2.0, event->x());
183 else if (event->buttons() & Qt::RightButton)
184 view_.zoom(-2.0, event->x());
187 void Viewport::wheelEvent(QWheelEvent *event)
191 if (event->orientation() == Qt::Vertical) {
192 // Vertical scrolling is interpreted as zooming in/out
193 view_.zoom(event->delta() / 120, event->x());
194 } else if (event->orientation() == Qt::Horizontal) {
195 // Horizontal scrolling is interpreted as moving left/right
196 view_.set_scale_offset(view_.scale(),
197 event->delta() * view_.scale()