1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the QtCore module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the either Technology Preview License Agreement or the
** Beta Release License Agreement.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain
** additional rights. These rights are described in the Nokia Qt LGPL
** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
** package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qwineventnotifier_p.h"
#include "qeventdispatcher_win_p.h"
#include "qcoreapplication.h"
#include <private/qthread_p.h>
QT_BEGIN_NAMESPACE
/*
\class QWinEventNotifier
\brief The QWinEventNotifier class provides support for the Windows Wait functions.
\ingroup io
The QWinEventNotifier class makes it possible to use the wait
functions on windows in a asynchronous manner. With this class
you can register a HANDLE to an event and get notification when
that event becomes signalled. The state of the event is not modified
in the process so if it is a manual reset event you will need to
reset it after the notification.
*/
QWinEventNotifier::QWinEventNotifier(QObject *parent)
: QObject(parent), handleToEvent(0), enabled(false)
{}
QWinEventNotifier::QWinEventNotifier(HANDLE hEvent, QObject *parent)
: QObject(parent), handleToEvent(hEvent), enabled(false)
{
Q_D(QObject);
QEventDispatcherWin32 *eventDispatcher = qobject_cast<QEventDispatcherWin32 *>(d->threadData->eventDispatcher);
Q_ASSERT_X(eventDispatcher, "QWinEventNotifier::QWinEventNotifier()",
"Cannot create a win event notifier without a QEventDispatcherWin32");
eventDispatcher->registerEventNotifier(this);
enabled = true;
}
QWinEventNotifier::~QWinEventNotifier()
{
setEnabled(false);
}
void QWinEventNotifier::setHandle(HANDLE hEvent)
{
setEnabled(false);
handleToEvent = hEvent;
}
HANDLE QWinEventNotifier::handle() const
{
return handleToEvent;
}
bool QWinEventNotifier::isEnabled() const
{
return enabled;
}
void QWinEventNotifier::setEnabled(bool enable)
{
if (enabled == enable) // no change
return;
enabled = enable;
Q_D(QObject);
QEventDispatcherWin32 *eventDispatcher = qobject_cast<QEventDispatcherWin32 *>(d->threadData->eventDispatcher);
if (!eventDispatcher) // perhaps application is shutting down
return;
if (enabled)
eventDispatcher->registerEventNotifier(this);
else
eventDispatcher->unregisterEventNotifier(this);
}
bool QWinEventNotifier::event(QEvent * e)
{
if (e->type() == QEvent::ThreadChange) {
if (enabled) {
QMetaObject::invokeMethod(this, "setEnabled", Qt::QueuedConnection,
Q_ARG(bool, enabled));
setEnabled(false);
}
}
QObject::event(e); // will activate filters
if (e->type() == QEvent::WinEventAct) {
emit activated(handleToEvent);
return true;
}
return false;
}
QT_END_NAMESPACE
|
