private void SetGlowAnimation()
{
if (Indicator == null || glow == null || Indicator.ActualWidth.IsClose(currentAnimatedIndicatorWidth))
{
return;
}
currentAnimatedIndicatorWidth = Indicator.ActualWidth;
double currentOffset = glow.Margin.Left;
if (currentAnimationClock != null)
{
((IAnimatable)glow).RootClock.RemoveClock(currentAnimationClock);
currentAnimationClock = null;
}
if (Indicator.ActualWidth > 0)
{
double startOffset = -glow.ActualWidth;
double endOffset = Indicator.ActualWidth;
TimeSpan time = TimeSpan.FromSeconds((endOffset - startOffset) / 200);
ThicknessAnimationUsingKeyFrames thicknessAnimation = new ThicknessAnimationUsingKeyFrames();
thicknessAnimation.KeyFrames.Add(new LinearThicknessKeyFrame {
Value = new Thickness(startOffset, 0, 0, 0), KeyTime = KeyTime.FromTimeSpan(TimeSpan.Zero)
});
thicknessAnimation.KeyFrames.Add(new LinearThicknessKeyFrame {
Value = new Thickness(endOffset, 0, 0, 0), KeyTime = KeyTime.FromTimeSpan(time)
});
thicknessAnimation.Duration = new Duration(time + TimeSpan.FromSeconds(1));
thicknessAnimation.RepeatBehavior = RepeatBehavior.Forever;
thicknessAnimation.BeginTime = -time.Scale((currentOffset - startOffset) / (endOffset - startOffset));
currentAnimationClock = (AnimationTimelineClock)thicknessAnimation.CreateClock();
glow.ApplyAnimationClock(FrameworkElement.MarginProperty, currentAnimationClock);
currentAnimationClock.Begin(((IAnimatable)glow).RootClock);
}
else
{
glow.ClearAnimationClocks(FrameworkElement.MarginProperty);
}
}