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;
38 using std::dynamic_pointer_cast;
42 using std::numeric_limits;
43 using std::shared_ptr;
44 using std::stable_sort;
50 Viewport::Viewport(View &parent) :
52 drag_offset_(numeric_limits<double>::signaling_NaN()),
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 vector< shared_ptr<ViewItem> > items(this->items());
62 for (auto i = items.rbegin(); i != items.rend(); i++)
63 if ((*i)->enabled() &&
64 (*i)->hit_box_rect(rect()).contains(pt))
69 void Viewport::item_hover(const shared_ptr<ViewItem> &item)
72 setCursor(dynamic_pointer_cast<RowItem>(item) ?
73 Qt::SizeVerCursor : Qt::SizeHorCursor);
80 drag_offset_ = view_.offset();
83 void Viewport::drag_by(const QPoint &delta)
85 // Use std::isnan() instead of isnan(), the latter can cause issues.
86 if (std::isnan(drag_offset_))
89 view_.set_scale_offset(view_.scale(), drag_offset_ -
90 delta.x() * view_.scale());
93 void Viewport::drag_release()
95 drag_offset_ = numeric_limits<double>::signaling_NaN();
98 vector< shared_ptr<ViewItem> > Viewport::items()
100 vector< shared_ptr<ViewItem> > items(view_.begin(), view_.end());
101 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
102 copy(time_items.begin(), time_items.end(), back_inserter(items));
106 bool Viewport::touch_event(QTouchEvent *event)
108 QList<QTouchEvent::TouchPoint> touchPoints = event->touchPoints();
110 if (touchPoints.count() != 2) {
111 pinch_zoom_active_ = false;
115 const QTouchEvent::TouchPoint &touchPoint0 = touchPoints.first();
116 const QTouchEvent::TouchPoint &touchPoint1 = touchPoints.last();
118 if (!pinch_zoom_active_ ||
119 (event->touchPointStates() & Qt::TouchPointPressed)) {
120 pinch_offset0_ = view_.offset() + view_.scale() * touchPoint0.pos().x();
121 pinch_offset1_ = view_.offset() + view_.scale() * touchPoint1.pos().x();
122 pinch_zoom_active_ = true;
125 double w = touchPoint1.pos().x() - touchPoint0.pos().x();
128 fabs((pinch_offset1_ - pinch_offset0_) / w);
129 double offset = pinch_offset0_ - touchPoint0.pos().x() * scale;
131 view_.set_scale_offset(scale, offset);
134 if (event->touchPointStates() & Qt::TouchPointReleased) {
135 pinch_zoom_active_ = false;
137 if (touchPoint0.state() & Qt::TouchPointReleased) {
138 // Primary touch released
141 // Update the mouse down fields so that continued
142 // dragging with the primary touch will work correctly
143 mouse_down_point_ = touchPoint0.pos().toPoint();
151 void Viewport::paintEvent(QPaintEvent*)
153 vector< shared_ptr<RowItem> > row_items(view_.begin(), view_.end());
154 assert(none_of(row_items.begin(), row_items.end(),
155 [](const shared_ptr<RowItem> &r) { return !r; }));
157 stable_sort(row_items.begin(), row_items.end(),
158 [](const shared_ptr<RowItem> &a, const shared_ptr<RowItem> &b) {
159 return a->visual_v_offset() < b->visual_v_offset(); });
161 const vector< shared_ptr<TimeItem> > time_items(view_.time_items());
162 assert(none_of(time_items.begin(), time_items.end(),
163 [](const shared_ptr<TimeItem> &t) { return !t; }));
166 p.setRenderHint(QPainter::Antialiasing);
168 const ViewItemPaintParams pp(rect(), view_.scale(), view_.offset());
170 for (const shared_ptr<TimeItem> t : time_items)
171 t->paint_back(p, pp);
172 for (const shared_ptr<RowItem> r : row_items)
173 r->paint_back(p, pp);
175 for (const shared_ptr<TimeItem> t : time_items)
177 for (const shared_ptr<RowItem> r : row_items)
180 for (const shared_ptr<RowItem> r : row_items)
181 r->paint_fore(p, pp);
182 for (const shared_ptr<TimeItem> t : time_items)
183 t->paint_fore(p, pp);
188 void Viewport::mouseDoubleClickEvent(QMouseEvent *event)
192 if (event->buttons() & Qt::LeftButton)
193 view_.zoom(2.0, event->x());
194 else if (event->buttons() & Qt::RightButton)
195 view_.zoom(-2.0, event->x());
198 void Viewport::wheelEvent(QWheelEvent *e)
202 if (e->orientation() == Qt::Vertical)
204 if (e->modifiers() & Qt::ControlModifier) {
205 // Vertical scrolling with the control key pressed
206 // is intrepretted as vertical scrolling
207 view_.set_v_offset(-view_.owner_visual_v_offset() -
208 (e->delta() * height()) / (8 * 120));
210 // Vertical scrolling is interpreted as zooming in/out
211 view_.zoom(e->delta() / 120, e->x());
214 else if (e->orientation() == Qt::Horizontal)
216 // Horizontal scrolling is interpreted as moving left/right
217 view_.set_scale_offset(view_.scale(),
218 e->delta() * view_.scale() + view_.offset());