1 files changed, 143 insertions, 3 deletions

diff --git a/src/corelib/animation/qabstractanimation.cpp b/src/corelib/animation/qabstractanimation.cpp
index 641b42b..9add36e 100644
--- a/src/corelib/animation/qabstractanimation.cpp
+++ b/src/corelib/animation/qabstractanimation.cpp
@@ -166,11 +166,12 @@ Q_GLOBAL_STATIC(QThreadStorage<QUnifiedTimer *>, unifiedTimer)
 #endif
 
 QUnifiedTimer::QUnifiedTimer() :
-    QObject(), lastTick(0), timingInterval(DEFAULT_TIMER_INTERVAL),
+    QObject(), defaultDriver(this), lastTick(0), timingInterval(DEFAULT_TIMER_INTERVAL),
     currentAnimationIdx(0), consistentTiming(false), slowMode(false),
     slowdownFactor(5.0f), isPauseTimerActive(false), runningLeafAnimations(0)
 {
     time.invalidate();
+    driver = &defaultDriver;
 }
 
 
@@ -247,14 +248,27 @@ void QUnifiedTimer::restartAnimationTimer()
             qDebug() << runningPauseAnimations;
             qDebug() << closestPauseAnimationTimeToFinish();
         }
+        driver->stop();
         animationTimer.start(closestTimeToFinish, this);
         isPauseTimerActive = true;
-    } else if (!animationTimer.isActive() || isPauseTimerActive) {
-        animationTimer.start(timingInterval, this);
+    } else if (!driver->isRunning() || isPauseTimerActive) {
+        driver->start();
         isPauseTimerActive = false;
     }
 }
 
+void QUnifiedTimer::setTimingInterval(int interval)
+{
+    timingInterval = interval;
+
+    if (driver->isRunning() && !isPauseTimerActive) {
+        //we changed the timing interval
+        driver->stop();
+        driver->start();
+    }
+}
+
+
 void QUnifiedTimer::timerEvent(QTimerEvent *event)
 {
     //in the case of consistent timing we make sure the orders in which events come is always the same
@@ -369,6 +383,129 @@ int QUnifiedTimer::closestPauseAnimationTimeToFinish()
     return closestTimeToFinish;
 }
 
+void QUnifiedTimer::installAnimationDriver(QAnimationDriver *d)
+{
+    if (driver->isRunning()) {
+        qWarning("QUnifiedTimer: Cannot change animation driver while animations are running");
+        return;
+    }
+
+    if (driver && driver != &defaultDriver)
+        delete driver;
+
+    driver = d;
+}
+
+/*!
+   \class QAnimationDriver
+
+   \brief The QAnimationDriver class is used to exchange the mechanism that drives animations.
+
+   The default animation system is driven by a timer that fires at regular intervals.
+   In some scenarios, it is better to drive the animation based on other synchronization
+   mechanisms, such as the vertical refresh rate of the screen.
+ */
+
+QAnimationDriver::QAnimationDriver(QObject *parent)
+    : QObject(*(new QAnimationDriverPrivate), parent)
+{
+}
+
+QAnimationDriver::QAnimationDriver(QAnimationDriverPrivate &dd, QObject *parent)
+    : QObject(dd, parent)
+{
+}
+
+
+/*!
+    Advances the animation based on the current time. This function should
+    be continuously called by the driver while the animation is running.
+ */
+void QAnimationDriver::advance()
+{
+    QUnifiedTimer *instance = QUnifiedTimer::instance();
+
+    // update current time on all top level animations
+    instance->updateAnimationsTime();
+    instance->restartAnimationTimer();
+}
+
+
+/*!
+    Installs this animation driver. The animation driver is thread local and
+    will only apply for the thread its installed in.
+ */
+void QAnimationDriver::install()
+{
+    QUnifiedTimer *timer = QUnifiedTimer::instance(true);
+    timer->installAnimationDriver(this);
+}
+
+bool QAnimationDriver::isRunning() const
+{
+    return d_func()->running;
+}
+
+
+void QAnimationDriver::start()
+{
+    Q_D(QAnimationDriver);
+    if (!d->running) {
+        started();
+        d->running = true;
+    }
+}
+
+
+void QAnimationDriver::stop()
+{
+    Q_D(QAnimationDriver);
+    if (d->running) {
+        stopped();
+        d->running = false;
+    }
+}
+
+/*!
+    \fn QAnimationDriver::started()
+
+    This function is called by the animation framework to notify the driver
+    that it should start running.
+ */
+
+/*!
+    \fn QAnimationDriver::stopped()
+
+    This function is called by the animation framework to notify the driver
+    that it should stop running.
+ */
+
+/*!
+   The default animation driver just spins the timer...
+ */
+QDefaultAnimationDriver::QDefaultAnimationDriver(QUnifiedTimer *timer)
+    : QAnimationDriver(0), m_unified_timer(timer)
+{
+}
+
+void QDefaultAnimationDriver::timerEvent(QTimerEvent *e)
+{
+    Q_ASSERT(e->timerId() == m_timer.timerId());
+    advance();
+}
+
+void QDefaultAnimationDriver::started()
+{
+    m_timer.start(m_unified_timer->timingInterval, this);
+}
+
+void QDefaultAnimationDriver::stopped()
+{
+    m_timer.stop();
+}
+
+
+
 void QAbstractAnimationPrivate::setState(QAbstractAnimation::State newState)
 {
     Q_Q(QAbstractAnimation);
@@ -794,6 +931,9 @@ void QAbstractAnimation::stop()
 {
     Q_D(QAbstractAnimation);
 
+    if (d->state == Stopped)
+        return;
+
     d->setState(Stopped);
 }