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
137
|
/****************************************************************************
**
** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** 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 Technology Preview License Agreement accompanying
** this package.
**
** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qbasictimer.h"
#include "qcoreapplication.h"
#include "qabstracteventdispatcher.h"
QT_BEGIN_NAMESPACE
/*!
\class QBasicTimer
\brief The QBasicTimer class provides timer events for objects.
\ingroup events
This is a fast, lightweight, and low-level class used by Qt
internally. We recommend using the higher-level QTimer class
rather than this class if you want to use timers in your
applications.
To use this class, create a QBasicTimer, and call its start()
function with a timeout interval and with a pointer to a QObject
subclass. When the timer times out it will send a timer event to
the QObject subclass. The timer can be stopped at any time using
stop(). isActive() returns true for a timer that is running;
i.e. it has been started, has not reached the timeout time, and
has not been stopped. The timer's ID can be retrieved using
timerId().
The \l{widgets/wiggly}{Wiggly} example uses QBasicTimer to repaint
a widget at regular intervals.
\sa QTimer, QTimerEvent, QObject::timerEvent(), Timers, {Wiggly Example}
*/
/*!
\fn QBasicTimer::QBasicTimer()
Contructs a basic timer.
\sa start()
*/
/*!
\fn QBasicTimer::~QBasicTimer()
Destroys the basic timer.
*/
/*!
\fn bool QBasicTimer::isActive() const
Returns true if the timer is running, has not yet timed
out, and has not been stopped; otherwise returns false.
\sa start() stop()
*/
/*!
\fn int QBasicTimer::timerId() const
Returns the timer's ID.
\sa QTimerEvent::timerId()
*/
/*!
\fn void QBasicTimer::start(int msec, QObject *object)
Starts (or restarts) the timer with a \a msec milliseconds
timeout.
The given \a object will receive timer events.
\sa stop() isActive() QObject::timerEvent()
*/
void QBasicTimer::start(int msec, QObject *obj)
{
stop();
if (obj)
id = obj->startTimer(msec);
}
/*!
Stops the timer.
\sa start() isActive()
*/
void QBasicTimer::stop()
{
if (id) {
QAbstractEventDispatcher *eventDispatcher = QAbstractEventDispatcher::instance();
if (eventDispatcher)
eventDispatcher->unregisterTimer(id);
}
id = 0;
}
QT_END_NAMESPACE
|
