QUnifiedTimer Class Reference

#include <qabstractanimation_p.h>

Inheritance diagram for QUnifiedTimer:

Public Functions
void	installAnimationDriver (QAnimationDriver *driver)
void	restartAnimationTimer ()
int	runningAnimationCount ()
void	setConsistentTiming (bool consistent)
void	setSlowdownFactor (qreal factor)
void	setSlowModeEnabled (bool enabled)
void	setTimingInterval (int interval)
void	updateAnimationsTime ()
Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...
const QObjectList &	children () const
	Returns a list of child objects. More...
bool	connect (const QObject *sender, const char *signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const
bool	disconnect (const char *signal=0, const QObject *receiver=0, const char *member=0)
bool	disconnect (const QObject *receiver, const char *member=0)
void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...
void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...
QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...
virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...
virtual bool	eventFilter (QObject *, QEvent *)
	Filters events if this object has been installed as an event filter for the watched object. More...
template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...
template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...
template<typename T >
QList< T >	findChildren (const QRegExp &re) const
bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...
void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...
bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...
void	killTimer (int id)
	Kills the timer with timer identifier, id. More...
virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...
void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...
QString	objectName () const
QObject *	parent () const
	Returns a pointer to the parent object. More...
QVariant	property (const char *name) const
	Returns the value of the object's name property. More...
Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...
void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...
void	setObjectName (const QString &name)
void	setParent (QObject *)
	Makes the object a child of parent. More...
bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...
void	setUserData (uint id, QObjectUserData *data)
bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...
int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...
QThread *	thread () const
	Returns the thread in which the object lives. More...
QObjectUserData *	userData (uint id) const
virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Static Public Functions
static void	ensureTimerUpdate ()
static QUnifiedTimer *	instance ()
static QUnifiedTimer *	instance (bool create)
static void	registerAnimation (QAbstractAnimation *animation, bool isTopLevel)
static void	unregisterAnimation (QAbstractAnimation *animation)
static void	updateAnimationTimer ()
Static Public Functions inherited from QObject
static bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...
static bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)
static bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *member)
	Disconnects signal in object sender from method in object receiver. More...
static bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &member)
static uint	registerUserData ()
static QString	tr (const char *sourceText, const char *comment=0, int n=-1)
static QString	trUtf8 (const char *sourceText, const char *comment=0, int n=-1)

Protected Functions
void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...
Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...
virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...
virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...
virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...
	QObject (QObjectPrivate &dd, QObject *parent=0)
int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...
QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...
int	senderSignalIndex () const

Private Functions
int	closestPauseAnimationTimeToFinish ()
	QUnifiedTimer ()
void	registerRunningAnimation (QAbstractAnimation *animation)
void	unregisterRunningAnimation (QAbstractAnimation *animation)

Properties
QList< QAbstractAnimation * >	animations
QList< QAbstractAnimation * >	animationsToStart
QBasicTimer	animationTimer
bool	consistentTiming
int	currentAnimationIdx
QDefaultAnimationDriver	defaultDriver
QAnimationDriver *	driver
bool	insideTick
bool	isPauseTimerActive
qint64	lastTick
int	runningLeafAnimations
QList< QAbstractAnimation * >	runningPauseAnimations
qreal	slowdownFactor
bool	slowMode
QBasicTimer	startStopAnimationTimer
ElapsedTimer	time
int	timingInterval

Friends
class	QDefaultAnimationDriver

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...
Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...
Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...
Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr
Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject
Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()
QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()
T *	qobject_cast (QObject *object)
	QObjectList
void *	qt_find_obj_child (QObject *parent, const char *type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 144 of file qabstractanimation_p.h.

Constructors and Destructors

QUnifiedTimer()

QUnifiedTimer::QUnifiedTimer ( )

private

Definition at line 183 of file qabstractanimation.cpp.

Referenced by instance().

                             :
    QObject(), defaultDriver(this), lastTick(0), timingInterval(DEFAULT_TIMER_INTERVAL),
    currentAnimationIdx(0), insideTick(false), consistentTiming(false), slowMode(false),
    slowdownFactor(5.0f), isPauseTimerActive(false), runningLeafAnimations(0)
{
    time.invalidate();
    driver = &defaultDriver;
}

Functions

closestPauseAnimationTimeToFinish()

int QUnifiedTimer::closestPauseAnimationTimeToFinish ( )

private

Definition at line 390 of file qabstractanimation.cpp.

Referenced by restartAnimationTimer().

{
    int closestTimeToFinish = INT_MAX;
    for (int i = 0; i < runningPauseAnimations.size(); ++i) {
        QAbstractAnimation *animation = runningPauseAnimations.at(i);
        int timeToFinish;

        if (animation->direction() == QAbstractAnimation::Forward)
            timeToFinish = animation->duration() - animation->currentLoopTime();
        else
            timeToFinish = animation->currentLoopTime();

        if (timeToFinish < closestTimeToFinish)
            closestTimeToFinish = timeToFinish;
    }
    return closestTimeToFinish;
}

ensureTimerUpdate()

void QUnifiedTimer::ensureTimerUpdate ( )

static

Definition at line 215 of file qabstractanimation.cpp.

Referenced by QAbstractAnimation::setDirection(), and QAbstractAnimationPrivate::setState().

{
    QUnifiedTimer *inst = QUnifiedTimer::instance(false);
    if (inst && inst->isPauseTimerActive)
        inst->updateAnimationsTime();
}

installAnimationDriver()

void QUnifiedTimer::installAnimationDriver

(

QAnimationDriver *

driver

)

Definition at line 408 of file qabstractanimation.cpp.

Referenced by QAnimationDriver::install().

{
    if (driver) {

        if (driver->isRunning()) {
            qWarning("QUnifiedTimer: Cannot change animation driver while animations are running");
            return;
        }

        if (driver != &defaultDriver)
            delete driver;
    }

    driver = d;
}

instance() [1/2]

QUnifiedTimer * QUnifiedTimer::instance ( )

static

Definition at line 210 of file qabstractanimation.cpp.

Referenced by QAnimationDriver::advance(), ensureTimerUpdate(), QAnimationDriver::install(), registerAnimation(), QDeclarativeDebugHelper::setAnimationSlowDownFactor(), unregisterAnimation(), and updateAnimationTimer().

{
    return instance(true);
}

instance() [2/2]

QUnifiedTimer * QUnifiedTimer::instance ( bool  create )

static

Definition at line 193 of file qabstractanimation.cpp.

{
    QUnifiedTimer *inst;
#ifndef QT_NO_THREAD
    if (create && !unifiedTimer()->hasLocalData()) {
        inst = new QUnifiedTimer;
        unifiedTimer()->setLocalData(inst);
    } else {
        inst = unifiedTimer()->localData();
    }
#else
    static QUnifiedTimer unifiedTimer;
    inst = &unifiedTimer;
#endif
    return inst;
}

registerAnimation()

void QUnifiedTimer::registerAnimation ( QAbstractAnimation *  animation, bool  isTopLevel  )

static

Definition at line 326 of file qabstractanimation.cpp.

Referenced by QAbstractAnimationPrivate::setState().

{
    QUnifiedTimer *inst = instance(true); //we create the instance if needed
    inst->registerRunningAnimation(animation);
    if (isTopLevel) {
        Q_ASSERT(!QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer);
        QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer = true;
        inst->animationsToStart << animation;
        if (!inst->startStopAnimationTimer.isActive())
            inst->startStopAnimationTimer.start(STARTSTOP_TIMER_DELAY, inst);
    }
}

registerRunningAnimation()

void QUnifiedTimer::registerRunningAnimation ( QAbstractAnimation *  animation )

private

Definition at line 367 of file qabstractanimation.cpp.

Referenced by registerAnimation().

{
    if (QAbstractAnimationPrivate::get(animation)->isGroup)
        return;

    if (QAbstractAnimationPrivate::get(animation)->isPause) {
        runningPauseAnimations << animation;
    } else
        runningLeafAnimations++;
}

restartAnimationTimer()

void QUnifiedTimer::restartAnimationTimer

(

)

Definition at line 264 of file qabstractanimation.cpp.

Referenced by QAnimationDriver::advance(), timerEvent(), and updateAnimationTimer().

{
    if (runningLeafAnimations == 0 && !runningPauseAnimations.isEmpty()) {
        int closestTimeToFinish = closestPauseAnimationTimeToFinish();
        if (closestTimeToFinish < 0) {
            qDebug() << runningPauseAnimations;
            qDebug() << closestPauseAnimationTimeToFinish();
        }
        driver->stop();
        animationTimer.start(closestTimeToFinish, this);
        isPauseTimerActive = true;
    } else if (!driver->isRunning() || isPauseTimerActive) {
        driver->start();
        isPauseTimerActive = false;
    } else if (runningLeafAnimations == 0)
        driver->stop();
}

runningAnimationCount()

int QUnifiedTimer::runningAnimationCount ( )

inline

Definition at line 188 of file qabstractanimation_p.h.

{ return animations.count(); }

setConsistentTiming()

void QUnifiedTimer::setConsistentTiming ( bool  consistent )

inline

Definition at line 164 of file qabstractanimation_p.h.

{ consistentTiming = consistent; }

setSlowdownFactor()

void QUnifiedTimer::setSlowdownFactor ( qreal  factor )

inline

Definition at line 168 of file qabstractanimation_p.h.

Referenced by QDeclarativeDebugHelper::setAnimationSlowDownFactor().

{ slowdownFactor = factor; }

setSlowModeEnabled()

void QUnifiedTimer::setSlowModeEnabled ( bool  enabled )

inline

Definition at line 167 of file qabstractanimation_p.h.

Referenced by QDeclarativeDebugHelper::setAnimationSlowDownFactor().

{ slowMode = enabled; }

setTimingInterval()

void QUnifiedTimer::setTimingInterval

(

int

interval

)

Definition at line 282 of file qabstractanimation.cpp.

{
    timingInterval = interval;

    if (driver->isRunning() && !isPauseTimerActive) {
        //we changed the timing interval
        driver->stop();
        driver->start();
    }
}

timerEvent()

void QUnifiedTimer::timerEvent ( QTimerEvent *  event )

protectedvirtual

This event handler can be reimplemented in a subclass to receive timer events for the object.

QTimer provides a higher-level interface to the timer functionality, and also more general information about timers. The timer event is passed in the event parameter.

See also

startTimer(), killTimer(), event()

Reimplemented from QObject.

Definition at line 294 of file qabstractanimation.cpp.

{
    //in the case of consistent timing we make sure the orders in which events come is always the same
   //for that purpose we do as if the startstoptimer would always fire before the animation timer
    if ((consistentTiming && startStopAnimationTimer.isActive()) ||
        event->timerId() == startStopAnimationTimer.timerId()) {
        startStopAnimationTimer.stop();

        //we transfer the waiting animations into the "really running" state
        animations += animationsToStart;
        animationsToStart.clear();
        if (animations.isEmpty()) {
            animationTimer.stop();
            isPauseTimerActive = false;
            // invalidate the start reference time
            time.invalidate();
        } else {
            restartAnimationTimer();
            if (!time.isValid()) {
                lastTick = 0;
                time.start();
            }
        }
    }

    if (event->timerId() == animationTimer.timerId()) {
        // update current time on all top level animations
        updateAnimationsTime();
        restartAnimationTimer();
    }
}

unregisterAnimation()

void QUnifiedTimer::unregisterAnimation ( QAbstractAnimation *  animation )

static

Definition at line 339 of file qabstractanimation.cpp.

Referenced by QAbstractAnimationPrivate::setState(), and QAbstractAnimation::~QAbstractAnimation().

{
    QUnifiedTimer *inst = QUnifiedTimer::instance(false);
    if (inst) {
        //at this point the unified timer should have been created
        //but it might also have been already destroyed in case the application is shutting down

        inst->unregisterRunningAnimation(animation);

        if (!QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer)
            return;

        int idx = inst->animations.indexOf(animation);
        if (idx != -1) {
            inst->animations.removeAt(idx);
            // this is needed if we unregister an animation while its running
            if (idx <= inst->currentAnimationIdx)
                --inst->currentAnimationIdx;

            if (inst->animations.isEmpty() && !inst->startStopAnimationTimer.isActive())
                inst->startStopAnimationTimer.start(STARTSTOP_TIMER_DELAY, inst);
        } else {
            inst->animationsToStart.removeOne(animation);
        }
    }
    QAbstractAnimationPrivate::get(animation)->hasRegisteredTimer = false;
}

unregisterRunningAnimation()

void QUnifiedTimer::unregisterRunningAnimation ( QAbstractAnimation *  animation )

private

Definition at line 378 of file qabstractanimation.cpp.

Referenced by unregisterAnimation().

{
    if (QAbstractAnimationPrivate::get(animation)->isGroup)
        return;

    if (QAbstractAnimationPrivate::get(animation)->isPause)
        runningPauseAnimations.removeOne(animation);
    else
        runningLeafAnimations--;
    Q_ASSERT(runningLeafAnimations >= 0);
}

updateAnimationsTime()

void QUnifiedTimer::updateAnimationsTime

(

)

Definition at line 222 of file qabstractanimation.cpp.

Referenced by QAnimationDriver::advance(), ensureTimerUpdate(), and timerEvent().

{
    //setCurrentTime can get this called again while we're the for loop. At least with pauseAnimations
    if(insideTick)
        return;

    qint64 totalElapsed = time.elapsed();
    // ignore consistentTiming in case the pause timer is active
    int delta = (consistentTiming && !isPauseTimerActive) ?
                        timingInterval : totalElapsed - lastTick;
    if (slowMode) {
        if (slowdownFactor > 0)
            delta = qRound(delta / slowdownFactor);
        else
            delta = 0;
    }

    lastTick = totalElapsed;

    //we make sure we only call update time if the time has actually changed
    //it might happen in some cases that the time doesn't change because events are delayed
    //when the CPU load is high
    if (delta) {
        insideTick = true;
        for (currentAnimationIdx = 0; currentAnimationIdx < animations.count(); ++currentAnimationIdx) {
            QAbstractAnimation *animation = animations.at(currentAnimationIdx);
            int elapsed = QAbstractAnimationPrivate::get(animation)->totalCurrentTime
                          + (animation->direction() == QAbstractAnimation::Forward ? delta : -delta);
            animation->setCurrentTime(elapsed);
        }
        insideTick = false;
        currentAnimationIdx = 0;
    }
}

updateAnimationTimer()

void QUnifiedTimer::updateAnimationTimer ( )

static

Definition at line 257 of file qabstractanimation.cpp.

Referenced by QAbstractAnimation::setDirection().

{
    QUnifiedTimer *inst = QUnifiedTimer::instance(false);
    if (inst)
        inst->restartAnimationTimer();
}

Friends and Related Functions

QDefaultAnimationDriver

friend class QDefaultAnimationDriver

friend

Definition at line 194 of file qabstractanimation_p.h.

Properties

animations

QList<QAbstractAnimation*> QUnifiedTimer::animations

private

Definition at line 220 of file qabstractanimation_p.h.

Referenced by timerEvent(), unregisterAnimation(), and updateAnimationsTime().

animationsToStart

QList<QAbstractAnimation*> QUnifiedTimer::animationsToStart

private

Definition at line 220 of file qabstractanimation_p.h.

Referenced by registerAnimation(), timerEvent(), and unregisterAnimation().

animationTimer

QBasicTimer QUnifiedTimer::animationTimer

private

Definition at line 199 of file qabstractanimation_p.h.

Referenced by restartAnimationTimer(), and timerEvent().

consistentTiming

bool QUnifiedTimer::consistentTiming

private

Definition at line 209 of file qabstractanimation_p.h.

Referenced by timerEvent(), and updateAnimationsTime().

currentAnimationIdx

int QUnifiedTimer::currentAnimationIdx

private

Definition at line 207 of file qabstractanimation_p.h.

Referenced by unregisterAnimation(), and updateAnimationsTime().

defaultDriver

QDefaultAnimationDriver QUnifiedTimer::defaultDriver

private

Definition at line 197 of file qabstractanimation_p.h.

Referenced by installAnimationDriver(), and QUnifiedTimer().

driver

QAnimationDriver* QUnifiedTimer::driver

private

Definition at line 196 of file qabstractanimation_p.h.

Referenced by installAnimationDriver(), QUnifiedTimer(), restartAnimationTimer(), and setTimingInterval().

insideTick

bool QUnifiedTimer::insideTick

private

Definition at line 208 of file qabstractanimation_p.h.

Referenced by updateAnimationsTime().

isPauseTimerActive

bool QUnifiedTimer::isPauseTimerActive

private

Definition at line 218 of file qabstractanimation_p.h.

Referenced by ensureTimerUpdate(), restartAnimationTimer(), setTimingInterval(), timerEvent(), and updateAnimationsTime().

lastTick

qint64 QUnifiedTimer::lastTick

private

Definition at line 205 of file qabstractanimation_p.h.

Referenced by timerEvent(), and updateAnimationsTime().

runningLeafAnimations

int QUnifiedTimer::runningLeafAnimations

private

Definition at line 223 of file qabstractanimation_p.h.

Referenced by registerRunningAnimation(), restartAnimationTimer(), and unregisterRunningAnimation().

runningPauseAnimations

QList<QAbstractAnimation*> QUnifiedTimer::runningPauseAnimations

private

Definition at line 224 of file qabstractanimation_p.h.

Referenced by closestPauseAnimationTimeToFinish(), registerRunningAnimation(), restartAnimationTimer(), and unregisterRunningAnimation().

slowdownFactor

qreal QUnifiedTimer::slowdownFactor

private

Definition at line 215 of file qabstractanimation_p.h.

Referenced by updateAnimationsTime().

slowMode

bool QUnifiedTimer::slowMode

private

Definition at line 210 of file qabstractanimation_p.h.

Referenced by updateAnimationsTime().

startStopAnimationTimer

QBasicTimer QUnifiedTimer::startStopAnimationTimer

private

Definition at line 201 of file qabstractanimation_p.h.

Referenced by registerAnimation(), timerEvent(), and unregisterAnimation().

time

ElapsedTimer QUnifiedTimer::time

private

Definition at line 203 of file qabstractanimation_p.h.

Referenced by QUnifiedTimer(), timerEvent(), and updateAnimationsTime().

timingInterval

int QUnifiedTimer::timingInterval

private

Definition at line 206 of file qabstractanimation_p.h.

Referenced by setTimingInterval(), QDefaultAnimationDriver::started(), and updateAnimationsTime().

---

The documentation for this class was generated from the following files:

• /src/corelib/animation/qabstractanimation_p.h
• /src/corelib/animation/qabstractanimation.cpp