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e0e90d80 JH |
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, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | #ifndef PULSEVIEW_PV_SELECTABLEITEM_H | |
22 | #define PULSEVIEW_PV_SELECTABLEITEM_H | |
23 | ||
24 | #include <list> | |
25 | ||
d09674d4 | 26 | #include <QPen> |
2a2512b2 | 27 | |
e0e90d80 | 28 | class QAction; |
9b6378f1 JH |
29 | class QMenu; |
30 | class QWidget; | |
e0e90d80 JH |
31 | |
32 | namespace pv { | |
a28a212c JH |
33 | |
34 | namespace widgets { | |
35 | class Popup; | |
36 | } | |
37 | ||
e0e90d80 JH |
38 | namespace view { |
39 | ||
2a2512b2 | 40 | class SelectableItem : public QObject |
e0e90d80 | 41 | { |
2a2512b2 JH |
42 | Q_OBJECT |
43 | ||
d09674d4 JH |
44 | private: |
45 | static const int HighlightRadius; | |
46 | ||
f1283456 JH |
47 | public: |
48 | SelectableItem(); | |
49 | ||
50 | public: | |
096fb584 JH |
51 | /** |
52 | * Returns true if the item is visible and enabled. | |
53 | */ | |
54 | virtual bool enabled() const = 0; | |
55 | ||
f1283456 | 56 | /** |
7ccd5a64 | 57 | * Returns true if the item has been selected by the user. |
f1283456 JH |
58 | */ |
59 | bool selected() const; | |
60 | ||
61 | /** | |
62 | * Selects or deselects the signal. | |
63 | */ | |
64 | void select(bool select = true); | |
65 | ||
0dda6fe5 JH |
66 | /** |
67 | * Returns true if the item is being dragged. | |
68 | */ | |
69 | bool dragging() const; | |
70 | ||
71 | /** | |
72 | * Retunrns the current drag point. | |
73 | */ | |
74 | QPoint drag_point() const; | |
75 | ||
76 | /** | |
77 | * Sets this item into the dragged state. | |
78 | */ | |
79 | void drag(); | |
80 | ||
81 | /** | |
82 | * Sets this item into the un-dragged state. | |
83 | */ | |
84 | void drag_release(); | |
85 | ||
86 | /** | |
87 | * Get the drag point. | |
88 | */ | |
89 | virtual QPoint point() const = 0; | |
90 | ||
d8d724cc JH |
91 | public: |
92 | /** | |
93 | * Gets the text colour. | |
94 | * @remarks This colour is computed by comparing the lightness | |
95 | * of the trace colour against a threshold to determine whether | |
96 | * white or black would be more visible. | |
97 | */ | |
98 | static QColor select_text_colour(QColor background); | |
99 | ||
a55c544b | 100 | public: |
9b6378f1 JH |
101 | virtual QMenu* create_context_menu(QWidget *parent); |
102 | ||
a28a212c JH |
103 | virtual pv::widgets::Popup* create_popup(QWidget *parent) = 0; |
104 | ||
5ed1adf5 JH |
105 | virtual void delete_pressed(); |
106 | ||
d09674d4 JH |
107 | protected: |
108 | static QPen highlight_pen(); | |
109 | ||
9b6378f1 | 110 | protected: |
8dbbc7f0 | 111 | QWidget *context_parent_; |
9b6378f1 | 112 | |
f1283456 | 113 | private: |
8dbbc7f0 JH |
114 | bool selected_; |
115 | QPoint drag_point_; | |
e0e90d80 JH |
116 | }; |
117 | ||
118 | } // namespace view | |
119 | } // namespace pv | |
120 | ||
121 | #endif // PULSEVIEW_PV_SELECTABLEITEM_H |