Unity 8
tabfocusfence.cpp
1 /*
2  * Copyright 2017 Canonical Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU Lesser General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program 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
11  * GNU Lesser General Public License for more details.
12  *
13  * You should have received a copy of the GNU Lesser General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15 */
16 
17 #include "tabfocusfence.h"
18 
19 #include <private/qquickitem_p.h>
20 
21 TabFocusFenceItem::TabFocusFenceItem(QQuickItem *parent) : QQuickItem(parent)
22 {
23  QQuickItemPrivate *d = QQuickItemPrivate::get(this);
24  d->isTabFence = true;
25  setFlag(ItemIsFocusScope);
26 }
27 
28 bool TabFocusFenceItem::focusNext()
29 {
30  QQuickItem * current = scopedFocusItem();
31  if (current) {
32  QQuickItem * next = current->nextItemInFocusChain(true);
33  if (next) {
34  next->setFocus(true, Qt::TabFocusReason);
35  return true;
36  }
37  }
38  return false;
39 }
40 
41 bool TabFocusFenceItem::focusPrev()
42 {
43  QQuickItem * current = scopedFocusItem();
44  if (current) {
45  QQuickItem * prev = current->nextItemInFocusChain(false);
46  if (prev) {
47  prev->setFocus(true, Qt::BacktabFocusReason);
48  return true;
49  }
50  }
51  return false;
52 }
53 
54 void TabFocusFenceItem::keyPressEvent(QKeyEvent *event)
55 {
56  // Needed so we eat Tab keys when there's only one item inside the fence
57  if (event->key() == Qt::Key_Tab) {
58  event->accept();
59  } else {
60  QQuickItem::keyPressEvent(event);
61  }
62 }
63 
64 void TabFocusFenceItem::keyReleaseEvent(QKeyEvent *event)
65 {
66  // Needed so we eat Tab keys when there's only one item inside the fence
67  if (event->key() == Qt::Key_Tab) {
68  event->accept();
69  } else {
70  QQuickItem::keyReleaseEvent(event);
71  }
72 }