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, see <http://www.gnu.org/licenses/>.
27 #include "viewitempaintparams.hpp"
28 #include "viewport.hpp"
30 #include <pv/session.hpp>
32 #include <QMouseEvent>
39 using std::back_inserter;
41 using std::dynamic_pointer_cast;
42 using std::none_of; // NOLINT. Used in assert()s.
43 using std::shared_ptr;
44 using std::stable_sort;
51 Viewport::Viewport(View &parent) :
53 pinch_zoom_active_(false)
55 setAutoFillBackground(true);
56 setBackgroundRole(QPalette::Base);
59 shared_ptr<ViewItem> Viewport::get_mouse_over_item(const QPoint &pt)
61 const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
62 const vector< shared_ptr<ViewItem> > items(this->items());
63 for (auto i = items.rbegin(); i != items.rend(); i++)
64 if ((*i)->enabled() && (*i)->hit_box_rect(pp).contains(pt))
69 void Viewport::item_hover(const shared_ptr<ViewItem> &item, QPoint pos)
71 if (item && item->is_draggable(pos))
72 setCursor(dynamic_pointer_cast<ViewItem>(item) ?
73 Qt::SizeHorCursor : Qt::SizeVerCursor);
80 drag_offset_ = view_.offset();
81 drag_v_offset_ = view_.owner_visual_v_offset();
84 void Viewport::drag_by(const QPoint &delta)
86 if (drag_offset_ == boost::none)
89 view_.set_scale_offset(view_.scale(),
90 (*drag_offset_ - delta.x() * view_.scale()));
92 view_.set_v_offset(-drag_v_offset_ - delta.y());
95 void Viewport::drag_release()
97 drag_offset_ = boost::none;
100 vector< shared_ptr<ViewItem> > Viewport::items()
102 vector< shared_ptr<ViewItem> > items;
103 const vector< shared_ptr<ViewItem> > view_items(
104 view_.list_by_type<ViewItem>());
105 copy(view_items.begin(), view_items.end(), back_inserter(items));
106 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
107 copy(time_items.begin(), time_items.end(), back_inserter(items));
111 bool Viewport::touch_event(QTouchEvent *event)
113 QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
115 if (touchPoints.count() != 2) {
116 pinch_zoom_active_ = false;
119 if (event->device()->type() == QTouchDevice::TouchPad) {
123 const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
124 const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
126 if (!pinch_zoom_active_ ||
127 (event->touchPointStates() & Qt::TouchPointPressed)) {
128 pinch_offset0_ = (view_.offset() + view_.scale() * touchPoint0.pos().x()).convert_to<double>();
129 pinch_offset1_ = (view_.offset() + view_.scale() * touchPoint1.pos().x()).convert_to<double>();
130 pinch_zoom_active_ = true;
133 double w = touchPoint1.pos().x() - touchPoint0.pos().x();
136 fabs((pinch_offset1_ - pinch_offset0_) / w);
137 double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
139 view_.set_scale_offset(scale, offset);
142 if (event->touchPointStates() & Qt::TouchPointReleased) {
143 pinch_zoom_active_ = false;
145 if (touchPoint0.state() & Qt::TouchPointReleased) {
146 // Primary touch released
149 // Update the mouse down fields so that continued
150 // dragging with the primary touch will work correctly
151 mouse_down_point_ = touchPoint0.pos().toPoint();
159 void Viewport::paintEvent(QPaintEvent*)
161 typedef void (ViewItem::*LayerPaintFunc)(
162 QPainter &p, ViewItemPaintParams &pp);
163 LayerPaintFunc layer_paint_funcs[] = {
164 &ViewItem::paint_back, &ViewItem::paint_mid,
165 &ViewItem::paint_fore, nullptr};
167 vector< shared_ptr<ViewItem> > row_items(view_.list_by_type<ViewItem>());
168 assert(none_of(row_items.begin(), row_items.end(),
169 [](const shared_ptr<ViewItem> &r) { return !r; }));
171 stable_sort(row_items.begin(), row_items.end(),
172 [](const shared_ptr<ViewItem> &a, const shared_ptr<ViewItem> &b) {
173 return a->drag_point(QRect()).y() < b->drag_point(QRect()).y(); });
175 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
176 assert(none_of(time_items.begin(), time_items.end(),
177 [](const shared_ptr<TimeItem> &t) { return !t; }));
181 // Disable antialiasing for high-DPI displays
182 bool use_antialiasing =
183 window()->windowHandle()->screen()->devicePixelRatio() < 2.0;
184 p.setRenderHint(QPainter::Antialiasing, use_antialiasing);
186 for (LayerPaintFunc *paint_func = layer_paint_funcs;
187 *paint_func; paint_func++) {
188 ViewItemPaintParams time_pp(rect(), view_.scale(), view_.offset());
189 for (const shared_ptr<TimeItem>& t : time_items)
190 (t.get()->*(*paint_func))(p, time_pp);
192 ViewItemPaintParams row_pp(rect(), view_.scale(), view_.offset());
193 for (const shared_ptr<ViewItem>& r : row_items)
194 (r.get()->*(*paint_func))(p, row_pp);
200 void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
204 if (event->buttons() & Qt::LeftButton)
205 view_.zoom(2.0, event->x());
206 else if (event->buttons() & Qt::RightButton)
207 view_.zoom(-2.0, event->x());
210 void Viewport::wheelEvent(QWheelEvent *event)
214 if (event->orientation() == Qt::Vertical) {
215 if (event->modifiers() & Qt::ControlModifier) {
216 // Vertical scrolling with the control key pressed
217 // is intrepretted as vertical scrolling
218 view_.set_v_offset(-view_.owner_visual_v_offset() -
219 (event->delta() * height()) / (8 * 120));
221 // Vertical scrolling is interpreted as zooming in/out
222 view_.zoom(event->delta() / 120.0, event->x());
224 } else if (event->orientation() == Qt::Horizontal) {
225 // Horizontal scrolling is interpreted as moving left/right
226 view_.set_scale_offset(view_.scale(),
227 event->delta() * view_.scale() + view_.offset());