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>
37 using std::back_inserter;
39 using std::dynamic_pointer_cast;
40 using std::none_of; // NOLINT. Used in assert()s.
41 using std::shared_ptr;
42 using std::stable_sort;
49 Viewport::Viewport(View &parent) :
51 pinch_zoom_active_(false)
53 setAutoFillBackground(true);
54 setBackgroundRole(QPalette::Base);
57 shared_ptr<ViewItem> Viewport::get_mouse_over_item(const QPoint &pt)
59 const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
60 const vector< shared_ptr<ViewItem> > items(this->items());
61 for (auto i = items.rbegin(); i != items.rend(); i++)
62 if ((*i)->enabled() && (*i)->hit_box_rect(pp).contains(pt))
67 void Viewport::item_hover(const shared_ptr<ViewItem> &item, QPoint pos)
69 if (item && item->is_draggable(pos))
70 setCursor(dynamic_pointer_cast<RowItem>(item) ?
71 Qt::SizeVerCursor : Qt::SizeHorCursor);
78 drag_offset_ = view_.offset();
79 drag_v_offset_ = view_.owner_visual_v_offset();
82 void Viewport::drag_by(const QPoint &delta)
84 if (drag_offset_ == boost::none)
87 view_.set_scale_offset(view_.scale(),
88 (*drag_offset_ - delta.x() * view_.scale()));
90 view_.set_v_offset(-drag_v_offset_ - delta.y());
93 void Viewport::drag_release()
95 drag_offset_ = boost::none;
98 vector< shared_ptr<ViewItem> > Viewport::items()
100 vector< shared_ptr<ViewItem> > items;
101 const vector< shared_ptr<ViewItem> > view_items(
102 view_.list_by_type<ViewItem>());
103 copy(view_items.begin(), view_items.end(), back_inserter(items));
104 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
105 copy(time_items.begin(), time_items.end(), back_inserter(items));
109 bool Viewport::touch_event(QTouchEvent *event)
111 QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
113 if (touchPoints.count() != 2) {
114 pinch_zoom_active_ = false;
118 const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
119 const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
121 if (!pinch_zoom_active_ ||
122 (event->touchPointStates() & Qt::TouchPointPressed)) {
123 pinch_offset0_ = (view_.offset() + view_.scale() * touchPoint0.pos().x()).convert_to<double>();
124 pinch_offset1_ = (view_.offset() + view_.scale() * touchPoint1.pos().x()).convert_to<double>();
125 pinch_zoom_active_ = true;
128 double w = touchPoint1.pos().x() - touchPoint0.pos().x();
131 fabs((pinch_offset1_ - pinch_offset0_) / w);
132 double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
134 view_.set_scale_offset(scale, offset);
137 if (event->touchPointStates() & Qt::TouchPointReleased) {
138 pinch_zoom_active_ = false;
140 if (touchPoint0.state() & Qt::TouchPointReleased) {
141 // Primary touch released
144 // Update the mouse down fields so that continued
145 // dragging with the primary touch will work correctly
146 mouse_down_point_ = touchPoint0.pos().toPoint();
154 void Viewport::paintEvent(QPaintEvent*)
156 typedef void (ViewItem::*LayerPaintFunc)(
157 QPainter &p, ViewItemPaintParams &pp);
158 LayerPaintFunc layer_paint_funcs[] = {
159 &ViewItem::paint_back, &ViewItem::paint_mid,
160 &ViewItem::paint_fore, nullptr};
162 vector< shared_ptr<RowItem> > row_items(view_.list_by_type<RowItem>());
163 assert(none_of(row_items.begin(), row_items.end(),
164 [](const shared_ptr<RowItem> &r) { return !r; }));
166 stable_sort(row_items.begin(), row_items.end(),
167 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
168 return a->drag_point(QRect()).y() < b->drag_point(QRect()).y(); });
170 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
171 assert(none_of(time_items.begin(), time_items.end(),
172 [](const shared_ptr<TimeItem> &t) { return !t; }));
175 p.setRenderHint(QPainter::Antialiasing);
177 for (LayerPaintFunc *paint_func = layer_paint_funcs;
178 *paint_func; paint_func++) {
179 ViewItemPaintParams time_pp(rect(), view_.scale(), view_.offset());
180 for (const shared_ptr<TimeItem> t : time_items)
181 (t.get()->*(*paint_func))(p, time_pp);
183 ViewItemPaintParams row_pp(rect(), view_.scale(), view_.offset());
184 for (const shared_ptr<RowItem> r : row_items)
185 (r.get()->*(*paint_func))(p, row_pp);
191 void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
195 if (event->buttons() & Qt::LeftButton)
196 view_.zoom(2.0, event->x());
197 else if (event->buttons() & Qt::RightButton)
198 view_.zoom(-2.0, event->x());
201 void Viewport::wheelEvent(QWheelEvent *event)
205 if (event->orientation() == Qt::Vertical) {
206 if (event->modifiers() & Qt::ControlModifier) {
207 // Vertical scrolling with the control key pressed
208 // is intrepretted as vertical scrolling
209 view_.set_v_offset(-view_.owner_visual_v_offset() -
210 (event->delta() * height()) / (8 * 120));
212 // Vertical scrolling is interpreted as zooming in/out
213 view_.zoom(event->delta() / 120.0, event->x());
215 } else if (event->orientation() == Qt::Horizontal) {
216 // Horizontal scrolling is interpreted as moving left/right
217 view_.set_scale_offset(view_.scale(),
218 event->delta() * view_.scale() + view_.offset());