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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
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. | |
10 | * | |
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. | |
15 | * | |
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 | |
19 | */ | |
20 | ||
21 | #ifndef PULSEVIEW_PV_VIEW_VIEWPORT_HPP | |
22 | #define PULSEVIEW_PV_VIEW_VIEWPORT_HPP | |
23 | ||
24 | #include <boost/optional.hpp> | |
25 | ||
26 | #include <QTimer> | |
27 | #include <QTouchEvent> | |
28 | ||
29 | #include "pv/util.hpp" | |
30 | #include "viewwidget.hpp" | |
31 | ||
32 | class QPainter; | |
33 | class QPaintEvent; | |
34 | class Session; | |
35 | ||
36 | namespace pv { | |
37 | namespace view { | |
38 | ||
39 | class View; | |
40 | ||
41 | class Viewport : public ViewWidget | |
42 | { | |
43 | Q_OBJECT | |
44 | ||
45 | public: | |
46 | explicit Viewport(View &parent); | |
47 | ||
48 | private: | |
49 | /** | |
50 | * Indicates when a view item is being hovered over. | |
51 | * @param item The item that is being hovered over, or @c nullptr | |
52 | * if no view item is being hovered over. | |
53 | */ | |
54 | void item_hover(const std::shared_ptr<pv::view::ViewItem> &item); | |
55 | ||
56 | /** | |
57 | * Gets the first view item which has a hit-box that contains @c pt . | |
58 | * @param pt the point to search with. | |
59 | * @return the view item that has been found, or and empty | |
60 | * @c shared_ptr if no item was found. | |
61 | */ | |
62 | std::shared_ptr<pv::view::ViewItem> get_mouse_over_item( | |
63 | const QPoint &pt); | |
64 | ||
65 | /** | |
66 | * Sets this item into the dragged state. | |
67 | */ | |
68 | void drag(); | |
69 | ||
70 | /** | |
71 | * Drag the background by the delta offset. | |
72 | * @param delta the drag offset in pixels. | |
73 | */ | |
74 | void drag_by(const QPoint &delta); | |
75 | ||
76 | /** | |
77 | * Sets this item into the un-dragged state. | |
78 | */ | |
79 | void drag_release(); | |
80 | ||
81 | /** | |
82 | * Gets the items in the view widget. | |
83 | */ | |
84 | std::vector< std::shared_ptr<pv::view::ViewItem> > items(); | |
85 | ||
86 | /** | |
87 | * Handles touch begin update and end events. | |
88 | * @param e the event that triggered this handler. | |
89 | */ | |
90 | bool touch_event(QTouchEvent *event); | |
91 | ||
92 | private: | |
93 | void paintEvent(QPaintEvent *event); | |
94 | ||
95 | void mouseDoubleClickEvent(QMouseEvent *event); | |
96 | void wheelEvent(QWheelEvent *event); | |
97 | ||
98 | private: | |
99 | boost::optional<pv::util::Timestamp> drag_offset_; | |
100 | int drag_v_offset_; | |
101 | ||
102 | double pinch_offset0_; | |
103 | double pinch_offset1_; | |
104 | bool pinch_zoom_active_; | |
105 | }; | |
106 | ||
107 | } // namespace view | |
108 | } // namespace pv | |
109 | ||
110 | #endif // PULSEVIEW_PV_VIEW_VIEWPORT_HPP |