Adds slowdownFactor to UnifiedTimer in abstract animation

The slowdown factor is useful for debugging complex animations.
Setting it to 0 will stop all animations when slowMode is enabled.

Submitted-by: Lasse
Reviewed-by: Thierry

2 files changed, 16 insertions, 4 deletions

diff --git a/src/corelib/animation/qabstractanimation.cpp b/src/corelib/animation/qabstractanimation.cpp
index 04342e7..7feb3f7 100644
--- a/src/corelib/animation/qabstractanimation.cpp
+++ b/src/corelib/animation/qabstractanimation.cpp
@@ -168,7 +168,7 @@ Q_GLOBAL_STATIC(QThreadStorage<QUnifiedTimer *>, unifiedTimer)
 QUnifiedTimer::QUnifiedTimer() :
     QObject(), lastTick(0), timingInterval(DEFAULT_TIMER_INTERVAL),
     currentAnimationIdx(0), consistentTiming(false), slowMode(false),
-    isPauseTimerActive(false), runningLeafAnimations(0)
+    slowdownFactor(5.0f), isPauseTimerActive(false), runningLeafAnimations(0)
 {
     time.invalidate();
 }
@@ -208,8 +208,13 @@ void QUnifiedTimer::updateAnimationsTime()
     // ignore consistentTiming in case the pause timer is active
     int delta = (consistentTiming && !isPauseTimerActive) ?
                         timingInterval : time.elapsed() - lastTick;
-    if (slowMode)
-        delta /= 5;
+    if (slowMode) {
+        if (slowdownFactor > 0)
+            delta = qRound(delta / slowdownFactor);
+        else
+            delta = 0;
+    }
+
     lastTick = time.elapsed();
 
     //we make sure we only call update time if the time has actually changed
diff --git a/src/corelib/animation/qabstractanimation_p.h b/src/corelib/animation/qabstractanimation_p.h
index fcfe824..6ff18f5 100644
--- a/src/corelib/animation/qabstractanimation_p.h
+++ b/src/corelib/animation/qabstractanimation_p.h
@@ -145,8 +145,9 @@ public:
     */
     void setConsistentTiming(bool consistent) { consistentTiming = consistent; }
 
-    //this facilitates fine-tuning of complex animations
+    //these facilitate fine-tuning of complex animations
     void setSlowModeEnabled(bool enabled) { slowMode = enabled; }
+    void setSlowdownFactor(qreal factor) { slowdownFactor = factor; }
 
     /*
         this is used for updating the currentTime of all animations in case the pause
@@ -176,6 +177,12 @@ private:
     int currentAnimationIdx;
     bool consistentTiming;
     bool slowMode;
+
+    // This factor will be used to divide the DEFAULT_TIMER_INTERVAL at each tick
+    // when slowMode is enabled. Setting it to 0 or higher than DEFAULT_TIMER_INTERVAL (16)
+    // stops all animations.
+    qreal slowdownFactor;
+
     // bool to indicate that only pause animations are active
     bool isPauseTimerActive;