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/>.
20 #ifndef PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWPORT_HPP
21 #define PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWPORT_HPP
23 #include <boost/optional.hpp>
27 #include <QTouchEvent>
29 #include "pv/util.hpp"
30 #include "viewwidget.hpp"
32 using std::shared_ptr;
45 class Viewport : public ViewWidget
50 explicit Viewport(View &parent);
53 * Gets the first view item which has a hit-box that contains @c pt .
54 * @param pt the point to search with.
55 * @return the view item that has been found, or and empty
56 * @c shared_ptr if no item was found.
58 shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt);
62 * Indicates when a view item is being hovered over.
63 * @param item The item that is being hovered over, or @c nullptr
64 * if no view item is being hovered over.
66 void item_hover(const shared_ptr<ViewItem> &item, QPoint pos);
69 * Sets this item into the dragged state.
74 * Drag the background by the delta offset.
75 * @param delta the drag offset in pixels.
77 void drag_by(const QPoint &delta);
80 * Sets this item into the un-dragged state.
85 * Gets the items in the view widget.
87 vector< shared_ptr<ViewItem> > items();
90 * Handles touch begin update and end events.
91 * @param e the event that triggered this handler.
93 bool touch_event(QTouchEvent *event);
96 void paintEvent(QPaintEvent *event);
98 void mouseDoubleClickEvent(QMouseEvent *event);
99 void wheelEvent(QWheelEvent *event);
102 boost::optional<pv::util::Timestamp> drag_offset_;
105 double pinch_offset0_;
106 double pinch_offset1_;
107 bool pinch_zoom_active_;
114 #endif // PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWPORT_HPP