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[pulseview.git] / pv / widgets / popup.hpp
1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2013 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_WIDGETS_POPUP_HPP
21 #define PULSEVIEW_PV_WIDGETS_POPUP_HPP
22
23 #include <QWidget>
24
25 namespace pv {
26 namespace widgets {
27
28 class Popup : public QWidget
29 {
30         Q_OBJECT
31
32 public:
33         enum Position
34         {
35                 Right,
36                 Top,
37                 Left,
38                 Bottom
39         };
40
41 private:
42         static const unsigned int ArrowLength;
43         static const unsigned int ArrowOverlap;
44         static const unsigned int MarginWidth;
45
46 public:
47         Popup(QWidget *parent);
48
49         const QPoint& point() const;
50         Position position() const;
51
52         void set_position(const QPoint point, Position pos);
53
54         bool eventFilter(QObject *obj, QEvent *event);
55
56         void show();
57
58 private:
59         bool space_for_arrow() const;
60
61         QPolygon arrow_polygon() const;
62
63         QRegion arrow_region() const;
64
65         QRect bubble_rect() const;
66
67         QRegion bubble_region() const;
68
69         QRegion popup_region() const;
70
71         void reposition_widget();
72
73 private:
74         void closeEvent(QCloseEvent*);
75
76         void paintEvent(QPaintEvent*);
77
78         void resizeEvent(QResizeEvent*);
79
80         void mouseReleaseEvent(QMouseEvent *event);
81
82 protected:
83         void showEvent(QShowEvent *);
84
85 Q_SIGNALS:
86         void closed();
87
88 private:
89         QPoint point_;
90         Position pos_;
91 };
92
93 } // namespace widgets
94 } // namespace pv
95
96 #endif // PULSEVIEW_PV_WIDGETS_POPUP_HPP