| 1 | /****************************************************************************
|
|---|
| 2 | **
|
|---|
| 3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
|
|---|
| 4 | ** Contact: Qt Software Information ([email protected])
|
|---|
| 5 | **
|
|---|
| 6 | ** This file is part of the QtCore module of the Qt Toolkit.
|
|---|
| 7 | **
|
|---|
| 8 | ** $QT_BEGIN_LICENSE:LGPL$
|
|---|
| 9 | ** Commercial Usage
|
|---|
| 10 | ** Licensees holding valid Qt Commercial licenses may use this file in
|
|---|
| 11 | ** accordance with the Qt Commercial License Agreement provided with the
|
|---|
| 12 | ** Software or, alternatively, in accordance with the terms contained in
|
|---|
| 13 | ** a written agreement between you and Nokia.
|
|---|
| 14 | **
|
|---|
| 15 | ** GNU Lesser General Public License Usage
|
|---|
| 16 | ** Alternatively, this file may be used under the terms of the GNU Lesser
|
|---|
| 17 | ** General Public License version 2.1 as published by the Free Software
|
|---|
| 18 | ** Foundation and appearing in the file LICENSE.LGPL included in the
|
|---|
| 19 | ** packaging of this file. Please review the following information to
|
|---|
| 20 | ** ensure the GNU Lesser General Public License version 2.1 requirements
|
|---|
| 21 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
|
|---|
| 22 | **
|
|---|
| 23 | ** In addition, as a special exception, Nokia gives you certain
|
|---|
| 24 | ** additional rights. These rights are described in the Nokia Qt LGPL
|
|---|
| 25 | ** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
|
|---|
| 26 | ** package.
|
|---|
| 27 | **
|
|---|
| 28 | ** GNU General Public License Usage
|
|---|
| 29 | ** Alternatively, this file may be used under the terms of the GNU
|
|---|
| 30 | ** General Public License version 3.0 as published by the Free Software
|
|---|
| 31 | ** Foundation and appearing in the file LICENSE.GPL included in the
|
|---|
| 32 | ** packaging of this file. Please review the following information to
|
|---|
| 33 | ** ensure the GNU General Public License version 3.0 requirements will be
|
|---|
| 34 | ** met: http://www.gnu.org/copyleft/gpl.html.
|
|---|
| 35 | **
|
|---|
| 36 | ** If you are unsure which license is appropriate for your use, please
|
|---|
| 37 | ** contact the sales department at [email protected].
|
|---|
| 38 | ** $QT_END_LICENSE$
|
|---|
| 39 | **
|
|---|
| 40 | ****************************************************************************/
|
|---|
| 41 |
|
|---|
| 42 | #include "qbasictimer.h"
|
|---|
| 43 | #include "qcoreapplication.h"
|
|---|
| 44 | #include "qabstracteventdispatcher.h"
|
|---|
| 45 |
|
|---|
| 46 | QT_BEGIN_NAMESPACE
|
|---|
| 47 |
|
|---|
| 48 | /*!
|
|---|
| 49 | \class QBasicTimer
|
|---|
| 50 | \brief The QBasicTimer class provides timer events for objects.
|
|---|
| 51 |
|
|---|
| 52 | \ingroup time
|
|---|
| 53 | \ingroup events
|
|---|
| 54 |
|
|---|
| 55 | This is a fast, lightweight, and low-level class used by Qt
|
|---|
| 56 | internally. We recommend using the higher-level QTimer class
|
|---|
| 57 | rather than this class if you want to use timers in your
|
|---|
| 58 | applications.
|
|---|
| 59 |
|
|---|
| 60 | To use this class, create a QBasicTimer, and call its start()
|
|---|
| 61 | function with a timeout interval and with a pointer to a QObject
|
|---|
| 62 | subclass. When the timer times out it will send a timer event to
|
|---|
| 63 | the QObject subclass. The timer can be stopped at any time using
|
|---|
| 64 | stop(). isActive() returns true for a timer that is running;
|
|---|
| 65 | i.e. it has been started, has not reached the timeout time, and
|
|---|
| 66 | has not been stopped. The timer's ID can be retrieved using
|
|---|
| 67 | timerId().
|
|---|
| 68 |
|
|---|
| 69 | The \l{widgets/wiggly}{Wiggly} example uses QBasicTimer to repaint
|
|---|
| 70 | a widget at regular intervals.
|
|---|
| 71 |
|
|---|
| 72 | \sa QTimer, QTimerEvent, QObject::timerEvent(), Timers, {Wiggly Example}
|
|---|
| 73 | */
|
|---|
| 74 |
|
|---|
| 75 |
|
|---|
| 76 | /*!
|
|---|
| 77 | \fn QBasicTimer::QBasicTimer()
|
|---|
| 78 |
|
|---|
| 79 | Contructs a basic timer.
|
|---|
| 80 |
|
|---|
| 81 | \sa start()
|
|---|
| 82 | */
|
|---|
| 83 | /*!
|
|---|
| 84 | \fn QBasicTimer::~QBasicTimer()
|
|---|
| 85 |
|
|---|
| 86 | Destroys the basic timer.
|
|---|
| 87 | */
|
|---|
| 88 |
|
|---|
| 89 | /*!
|
|---|
| 90 | \fn bool QBasicTimer::isActive() const
|
|---|
| 91 |
|
|---|
| 92 | Returns true if the timer is running, has not yet timed
|
|---|
| 93 | out, and has not been stopped; otherwise returns false.
|
|---|
| 94 |
|
|---|
| 95 | \sa start() stop()
|
|---|
| 96 | */
|
|---|
| 97 |
|
|---|
| 98 | /*!
|
|---|
| 99 | \fn int QBasicTimer::timerId() const
|
|---|
| 100 |
|
|---|
| 101 | Returns the timer's ID.
|
|---|
| 102 |
|
|---|
| 103 | \sa QTimerEvent::timerId()
|
|---|
| 104 | */
|
|---|
| 105 |
|
|---|
| 106 | /*!
|
|---|
| 107 | \fn void QBasicTimer::start(int msec, QObject *object)
|
|---|
| 108 |
|
|---|
| 109 | Starts (or restarts) the timer with a \a msec milliseconds
|
|---|
| 110 | timeout.
|
|---|
| 111 |
|
|---|
| 112 | The given \a object will receive timer events.
|
|---|
| 113 |
|
|---|
| 114 | \sa stop() isActive() QObject::timerEvent()
|
|---|
| 115 | */
|
|---|
| 116 | void QBasicTimer::start(int msec, QObject *obj)
|
|---|
| 117 | {
|
|---|
| 118 | stop();
|
|---|
| 119 | if (obj)
|
|---|
| 120 | id = obj->startTimer(msec);
|
|---|
| 121 | }
|
|---|
| 122 |
|
|---|
| 123 | /*!
|
|---|
| 124 | Stops the timer.
|
|---|
| 125 |
|
|---|
| 126 | \sa start() isActive()
|
|---|
| 127 | */
|
|---|
| 128 | void QBasicTimer::stop()
|
|---|
| 129 | {
|
|---|
| 130 | if (id) {
|
|---|
| 131 | QAbstractEventDispatcher *eventDispatcher = QAbstractEventDispatcher::instance();
|
|---|
| 132 | if (eventDispatcher)
|
|---|
| 133 | eventDispatcher->unregisterTimer(id);
|
|---|
| 134 | }
|
|---|
| 135 | id = 0;
|
|---|
| 136 | }
|
|---|
| 137 |
|
|---|
| 138 | QT_END_NAMESPACE
|
|---|
