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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

1 files changed, 324 insertions, 0 deletions

diff --git a/src/declarative/util/qdeclarativetimer.cpp b/src/declarative/util/qdeclarativetimer.cpp
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+++ b/src/declarative/util/qdeclarativetimer.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative 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 "private/qdeclarativetimer_p.h"
+
+#include <QtCore/qcoreapplication.h>
+#include <QtCore/qpauseanimation.h>
+#include <qdebug.h>
+
+#include <private/qobject_p.h>
+
+QT_BEGIN_NAMESPACE
+
+
+
+class QDeclarativeTimerPrivate : public QObjectPrivate
+{
+    Q_DECLARE_PUBLIC(QDeclarativeTimer)
+public:
+    QDeclarativeTimerPrivate()
+        : interval(1000), running(false), repeating(false), triggeredOnStart(false)
+        , classBegun(false), componentComplete(false), firstTick(true) {}
+    int interval;
+    QPauseAnimation pause;
+    bool running : 1;
+    bool repeating : 1;
+    bool triggeredOnStart : 1;
+    bool classBegun : 1;
+    bool componentComplete : 1;
+    bool firstTick : 1;
+};
+
+/*!
+    \qmlclass Timer QDeclarativeTimer
+    \ingroup qml-utility-elements
+    \since 4.7
+    \brief The Timer item triggers a handler at a specified interval.
+
+    A Timer can be used to trigger an action either once, or repeatedly
+    at a given interval.
+
+    Here is a Timer that shows the current date and time, and updates
+    the text every 500 milliseconds. It uses the JavaScript \c Date
+    object to access the current time.
+
+    \qml
+    import QtQuick 1.0
+
+    Item {
+        Timer {
+            interval: 500; running: true; repeat: true
+            onTriggered: time.text = Date().toString()
+        }
+
+        Text { id: time }
+    }
+    \endqml
+
+    The Timer element is synchronized with the animation timer.  Since the animation
+    timer is usually set to 60fps, the resolution of Timer will be
+    at best 16ms.
+
+    If the Timer is running and one of its properties is changed, the
+    elapsed time will be reset.  For example, if a Timer with interval of
+    1000ms has its \e repeat property changed 500ms after starting, the
+    elapsed time will be reset to 0, and the Timer will be triggered
+    1000ms later.
+
+    \sa {declarative/toys/clocks}{Clocks example}
+*/
+
+QDeclarativeTimer::QDeclarativeTimer(QObject *parent)
+    : QObject(*(new QDeclarativeTimerPrivate), parent)
+{
+    Q_D(QDeclarativeTimer);
+    connect(&d->pause, SIGNAL(currentLoopChanged(int)), this, SLOT(ticked()));
+    connect(&d->pause, SIGNAL(finished()), this, SLOT(finished()));
+    d->pause.setLoopCount(1);
+    d->pause.setDuration(d->interval);
+}
+
+/*!
+    \qmlproperty int Timer::interval
+
+    Sets the \a interval between triggers, in milliseconds.
+
+    The default interval is 1000 milliseconds.
+*/
+void QDeclarativeTimer::setInterval(int interval)
+{
+    Q_D(QDeclarativeTimer);
+    if (interval != d->interval) {
+        d->interval = interval;
+        update();
+        emit intervalChanged();
+    }
+}
+
+int QDeclarativeTimer::interval() const
+{
+    Q_D(const QDeclarativeTimer);
+    return d->interval;
+}
+
+/*!
+    \qmlproperty bool Timer::running
+
+    If set to true, starts the timer; otherwise stops the timer.
+    For a non-repeating timer, \a running is set to false after the
+    timer has been triggered.
+
+    \a running defaults to false.
+
+    \sa repeat
+*/
+bool QDeclarativeTimer::isRunning() const
+{
+    Q_D(const QDeclarativeTimer);
+    return d->running;
+}
+
+void QDeclarativeTimer::setRunning(bool running)
+{
+    Q_D(QDeclarativeTimer);
+    if (d->running != running) {
+        d->running = running;
+        d->firstTick = true;
+        emit runningChanged();
+        update();
+    }
+}
+
+/*!
+    \qmlproperty bool Timer::repeat
+
+    If \a repeat is true the timer is triggered repeatedly at the
+    specified interval; otherwise, the timer will trigger once at the
+    specified interval and then stop (i.e. running will be set to false).
+
+    \a repeat defaults to false.
+
+    \sa running
+*/
+bool QDeclarativeTimer::isRepeating() const
+{
+    Q_D(const QDeclarativeTimer);
+    return d->repeating;
+}
+
+void QDeclarativeTimer::setRepeating(bool repeating)
+{
+    Q_D(QDeclarativeTimer);
+    if (repeating != d->repeating) {
+        d->repeating = repeating;
+        update();
+        emit repeatChanged();
+    }
+}
+
+/*!
+    \qmlproperty bool Timer::triggeredOnStart
+
+    When a timer is started, the first trigger is usually after the specified
+    interval has elapsed.  It is sometimes desirable to trigger immediately
+    when the timer is started; for example, to establish an initial
+    state.
+
+    If \a triggeredOnStart is true, the timer is triggered immediately
+    when started, and subsequently at the specified interval. Note that if
+    \e repeat is set to false, the timer is triggered twice; once on start,
+    and again at the interval.
+
+    \a triggeredOnStart defaults to false.
+
+    \sa running
+*/
+bool QDeclarativeTimer::triggeredOnStart() const
+{
+    Q_D(const QDeclarativeTimer);
+    return d->triggeredOnStart;
+}
+
+void QDeclarativeTimer::setTriggeredOnStart(bool triggeredOnStart)
+{
+    Q_D(QDeclarativeTimer);
+    if (d->triggeredOnStart != triggeredOnStart) {
+        d->triggeredOnStart = triggeredOnStart;
+        update();
+        emit triggeredOnStartChanged();
+    }
+}
+
+/*!
+    \qmlmethod Timer::start()
+    \brief Starts the timer.
+
+    If the timer is already running, calling this method has no effect.  The
+    \c running property will be true following a call to \c start().
+*/
+void QDeclarativeTimer::start()
+{
+    setRunning(true);
+}
+
+/*!
+    \qmlmethod Timer::stop()
+    \brief Stops the timer.
+
+    If the timer is not running, calling this method has no effect.  The
+    \c running property will be false following a call to \c stop().
+*/
+void QDeclarativeTimer::stop()
+{
+    setRunning(false);
+}
+
+/*!
+    \qmlmethod Timer::restart()
+    \brief Restarts the timer.
+
+    If the Timer is not running it will be started, otherwise it will be
+    stopped, reset to initial state and started.  The \c running property
+    will be true following a call to \c restart().
+*/
+void QDeclarativeTimer::restart()
+{
+    setRunning(false);
+    setRunning(true);
+}
+
+void QDeclarativeTimer::update()
+{
+    Q_D(QDeclarativeTimer);
+    if (d->classBegun && !d->componentComplete)
+        return;
+    d->pause.stop();
+    if (d->running) {
+        d->pause.setCurrentTime(0);
+        d->pause.setLoopCount(d->repeating ? -1 : 1);
+        d->pause.setDuration(d->interval);
+        d->pause.start();
+        if (d->triggeredOnStart && d->firstTick) {
+            QCoreApplication::removePostedEvents(this, QEvent::MetaCall);
+            QMetaObject::invokeMethod(this, "ticked", Qt::QueuedConnection);
+        }
+    }
+}
+
+void QDeclarativeTimer::classBegin()
+{
+    Q_D(QDeclarativeTimer);
+    d->classBegun = true;
+}
+
+void QDeclarativeTimer::componentComplete()
+{
+    Q_D(QDeclarativeTimer);
+    d->componentComplete = true;
+    update();
+}
+
+/*!
+    \qmlsignal Timer::onTriggered()
+
+    This handler is called when the Timer is triggered.
+*/
+void QDeclarativeTimer::ticked()
+{
+    Q_D(QDeclarativeTimer);
+    if (d->running && (d->pause.currentTime() > 0 || (d->triggeredOnStart && d->firstTick)))
+        emit triggered();
+    d->firstTick = false;
+}
+
+void QDeclarativeTimer::finished()
+{
+    Q_D(QDeclarativeTimer);
+    if (d->repeating || !d->running)
+        return;
+    emit triggered();
+    d->running = false;
+    d->firstTick = false;
+    emit runningChanged();
+}
+
+QT_END_NAMESPACE