1 | /* This file is part of the KDE project |
---|---|
2 | Copyright (C) 2008 Rafael Fernández López <ereslibre@kde.org> |
3 | |
4 | This library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Library General Public |
6 | License version 2 as published by the Free Software Foundation. |
7 | |
8 | This library is distributed in the hope that it will be useful, |
9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
11 | Library General Public License for more details. |
12 | |
13 | You should have received a copy of the GNU Library General Public License |
14 | along with this library; see the file COPYING.LIB. If not, write to |
15 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
16 | Boston, MA 02110-1301, USA. |
17 | |
18 | */ |
19 | |
20 | #ifndef KFILEPLACESVIEW_P_H |
21 | #define KFILEPLACESVIEW_P_H |
22 | |
23 | #include <QMouseEvent> |
24 | |
25 | class KFilePlacesEventWatcher |
26 | : public QObject |
27 | { |
28 | Q_OBJECT |
29 | |
30 | public: |
31 | KFilePlacesEventWatcher(QObject *parent = 0) |
32 | : QObject(parent) {} |
33 | |
34 | const QModelIndex &hoveredIndex() const |
35 | { |
36 | return m_hoveredIndex; |
37 | } |
38 | |
39 | const QModelIndex &focusedIndex() const |
40 | { |
41 | return m_focusedIndex; |
42 | } |
43 | |
44 | Q_SIGNALS: |
45 | void entryEntered(const QModelIndex &index); |
46 | void entryLeft(const QModelIndex &index); |
47 | |
48 | public Q_SLOTS: |
49 | void currentIndexChanged(const QModelIndex &index) |
50 | { |
51 | if (m_focusedIndex.isValid() && m_focusedIndex != m_hoveredIndex) { |
52 | emit entryLeft(m_focusedIndex); |
53 | } |
54 | if (index == m_hoveredIndex) { |
55 | m_focusedIndex = m_hoveredIndex; |
56 | return; |
57 | } |
58 | if (index.isValid()) { |
59 | emit entryEntered(index); |
60 | } |
61 | m_focusedIndex = index; |
62 | } |
63 | |
64 | protected: |
65 | virtual bool eventFilter(QObject *watched, QEvent *event) |
66 | { |
67 | switch (event->type()) { |
68 | case QEvent::MouseMove: { |
69 | QAbstractItemView *view = qobject_cast<QAbstractItemView*>(watched->parent()); |
70 | const QModelIndex index = view->indexAt(static_cast<QMouseEvent*>(event)->pos()); |
71 | if (index != m_hoveredIndex) { |
72 | if (m_hoveredIndex.isValid() && m_hoveredIndex != m_focusedIndex) { |
73 | emit entryLeft(m_hoveredIndex); |
74 | } |
75 | if (index.isValid() && index != m_focusedIndex) { |
76 | emit entryEntered(index); |
77 | } |
78 | m_hoveredIndex = index; |
79 | } |
80 | } |
81 | break; |
82 | case QEvent::Leave: |
83 | if (m_hoveredIndex.isValid() && m_hoveredIndex != m_focusedIndex) { |
84 | emit entryLeft(m_hoveredIndex); |
85 | } |
86 | m_hoveredIndex = QModelIndex(); |
87 | break; |
88 | case QEvent::MouseButtonPress: |
89 | case QEvent::MouseButtonDblClick: { |
90 | // Prevent the selection clearing by clicking on the viewport directly |
91 | QAbstractItemView *view = qobject_cast<QAbstractItemView*>(watched->parent()); |
92 | if (!view->indexAt(static_cast<QMouseEvent*>(event)->pos()).isValid()) { |
93 | return true; |
94 | } |
95 | } |
96 | break; |
97 | default: |
98 | return false; |
99 | } |
100 | |
101 | return false; |
102 | } |
103 | |
104 | private: |
105 | QPersistentModelIndex m_hoveredIndex; |
106 | QPersistentModelIndex m_focusedIndex; |
107 | }; |
108 | |
109 | #endif |
110 |