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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, see <http://www.gnu.org/licenses/>. | |
18 | */ | |
19 | ||
20 | #ifndef PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWPORT_HPP | |
21 | #define PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWPORT_HPP | |
22 | ||
23 | #include <boost/optional.hpp> | |
24 | ||
25 | #include <QTimer> | |
26 | #include <QTouchEvent> | |
27 | ||
28 | #include "pv/util.hpp" | |
29 | #include "viewwidget.hpp" | |
30 | ||
31 | using std::shared_ptr; | |
32 | using std::vector; | |
33 | ||
34 | class QPainter; | |
35 | class QPaintEvent; | |
36 | class Session; | |
37 | ||
38 | namespace pv { | |
39 | namespace views { | |
40 | namespace TraceView { | |
41 | ||
42 | class View; | |
43 | ||
44 | class Viewport : public ViewWidget | |
45 | { | |
46 | Q_OBJECT | |
47 | ||
48 | public: | |
49 | explicit Viewport(View &parent); | |
50 | ||
51 | private: | |
52 | /** | |
53 | * Indicates when a view item is being hovered over. | |
54 | * @param item The item that is being hovered over, or @c nullptr | |
55 | * if no view item is being hovered over. | |
56 | */ | |
57 | void item_hover(const shared_ptr<ViewItem> &item); | |
58 | ||
59 | /** | |
60 | * Gets the first view item which has a hit-box that contains @c pt . | |
61 | * @param pt the point to search with. | |
62 | * @return the view item that has been found, or and empty | |
63 | * @c shared_ptr if no item was found. | |
64 | */ | |
65 | shared_ptr<ViewItem> get_mouse_over_item(const QPoint &pt); | |
66 | ||
67 | /** | |
68 | * Sets this item into the dragged state. | |
69 | */ | |
70 | void drag(); | |
71 | ||
72 | /** | |
73 | * Drag the background by the delta offset. | |
74 | * @param delta the drag offset in pixels. | |
75 | */ | |
76 | void drag_by(const QPoint &delta); | |
77 | ||
78 | /** | |
79 | * Sets this item into the un-dragged state. | |
80 | */ | |
81 | void drag_release(); | |
82 | ||
83 | /** | |
84 | * Gets the items in the view widget. | |
85 | */ | |
86 | vector< shared_ptr<ViewItem> > items(); | |
87 | ||
88 | /** | |
89 | * Handles touch begin update and end events. | |
90 | * @param e the event that triggered this handler. | |
91 | */ | |
92 | bool touch_event(QTouchEvent *event); | |
93 | ||
94 | private: | |
95 | void paintEvent(QPaintEvent *event); | |
96 | ||
97 | void mouseDoubleClickEvent(QMouseEvent *event); | |
98 | void wheelEvent(QWheelEvent *event); | |
99 | ||
100 | private: | |
101 | boost::optional<pv::util::Timestamp> drag_offset_; | |
102 | int drag_v_offset_; | |
103 | ||
104 | double pinch_offset0_; | |
105 | double pinch_offset1_; | |
106 | bool pinch_zoom_active_; | |
107 | }; | |
108 | ||
109 | } // namespace TraceView | |
110 | } // namespace views | |
111 | } // namespace pv | |
112 | ||
113 | #endif // PULSEVIEW_PV_VIEWS_TRACEVIEW_VIEWPORT_HPP |