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40aca27e 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_VIEWWIDGET_H | |
22 | #define PULSEVIEW_PV_VIEWWIDGET_H | |
23 | ||
e9e4e5e7 JH |
24 | #include <memory> |
25 | ||
40aca27e JH |
26 | #include <QWidget> |
27 | ||
28 | namespace pv { | |
29 | namespace view { | |
30 | ||
31 | class View; | |
e9e4e5e7 | 32 | class ViewItem; |
40aca27e JH |
33 | |
34 | class ViewWidget : public QWidget | |
35 | { | |
36 | Q_OBJECT | |
37 | ||
38 | protected: | |
39 | ViewWidget(View &parent); | |
40 | ||
e9e4e5e7 JH |
41 | /** |
42 | * Indicates the event an a view item has been clicked. | |
43 | * @param item the view item that has been clicked. | |
44 | * @remarks the default implementation does nothing. | |
45 | */ | |
46 | virtual void item_clicked( | |
47 | const std::shared_ptr<pv::view::ViewItem> &item); | |
48 | ||
b434cbaf JH |
49 | /** |
50 | * Returns true if the selection of row items allows dragging. | |
51 | * @return Returns true if the drag is acceptable. | |
52 | */ | |
53 | bool accept_drag() const; | |
54 | ||
1dffa582 JH |
55 | /** |
56 | * Drag the dragging items by the delta offset. | |
57 | * @param delta the drag offset in pixels. | |
58 | */ | |
59 | void drag_items(const QPoint &delta); | |
60 | ||
e9e4e5e7 JH |
61 | /** |
62 | * Gets the items in the view widget. | |
63 | */ | |
64 | virtual std::vector< std::shared_ptr<pv::view::ViewItem> > items() = 0; | |
65 | ||
66 | /** | |
67 | * Gets the first view item which has a hit-box that contains @c pt . | |
68 | * @param pt the point to search with. | |
69 | * @return the view item that has been found, or and empty | |
70 | * @c shared_ptr if no item was found. | |
71 | */ | |
72 | virtual std::shared_ptr<pv::view::ViewItem> get_mouse_over_item( | |
73 | const QPoint &pt) = 0; | |
74 | ||
75 | /** | |
76 | * Handles left mouse button press events. | |
77 | * @param event the mouse event that triggered this handler. | |
78 | */ | |
79 | void mouse_left_press_event(QMouseEvent *event); | |
80 | ||
81 | /** | |
82 | * Handles left mouse button release events. | |
83 | * @param event the mouse event that triggered this handler. | |
84 | */ | |
85 | void mouse_left_release_event(QMouseEvent *event); | |
86 | ||
87 | protected: | |
88 | void mousePressEvent(QMouseEvent * event); | |
89 | void mouseReleaseEvent(QMouseEvent *event); | |
90 | void mouseMoveEvent(QMouseEvent *event); | |
91 | ||
92 | void leaveEvent(QEvent *event); | |
93 | ||
94 | public Q_SLOTS: | |
95 | void clear_selection(); | |
96 | ||
97 | Q_SIGNALS: | |
98 | void selection_changed(); | |
99 | ||
40aca27e JH |
100 | protected: |
101 | pv::view::View &view_; | |
e9e4e5e7 JH |
102 | QPoint mouse_point_; |
103 | QPoint mouse_down_point_; | |
104 | std::shared_ptr<ViewItem> mouse_down_item_; | |
803cdac4 | 105 | bool item_dragging_; |
40aca27e JH |
106 | }; |
107 | ||
108 | } // namespace view | |
109 | } // namespace pv | |
110 | ||
111 | #endif // PULSEVIEW_PV_VIEWWIDGET_H |