|
private static GetOriginalOpacity ( |
||
| obj | The dependency object. | |
| 리턴 | double | |
/// <summary>
/// Adds a set of animations corresponding to the
/// turnstile feather effect.
/// </summary>
/// <param name="storyboard">
/// The storyboard where the animations
/// will be added.</param>
/// <param name="beginTime">
/// The time at which the storyboard should begin.</param>
/// <param name="mode">
/// The mode of the turnstile feather effect.
/// </param>
internal static void ComposeStoryboard(Storyboard storyboard, TimeSpan?beginTime, TurnstileFeatherTransitionMode mode)
{
RestoreProjectionsAndTransforms();
_featheringTargets = GetTargetsToAnimate();
if (_featheringTargets == null)
{
return;
}
_pendingRestore = true;
switch (mode)
{
case TurnstileFeatherTransitionMode.ForwardIn:
ComposeForwardInStoryboard(storyboard);
break;
case TurnstileFeatherTransitionMode.ForwardOut:
ComposeForwardOutStoryboard(storyboard);
break;
case TurnstileFeatherTransitionMode.BackwardIn:
ComposeBackwardInStoryboard(storyboard);
break;
case TurnstileFeatherTransitionMode.BackwardOut:
ComposeBackwardOutStoryboard(storyboard);
break;
default:
break;
}
storyboard.BeginTime = beginTime;
storyboard.Completed += (s, e) =>
{
foreach (WeakReference r in _featheringTargets)
{
FrameworkElement element = (FrameworkElement)r.Target;
double originalOpacity = TurnstileFeatherEffect.GetOriginalOpacity(element);
element.Opacity = originalOpacity;
}
RestoreProjectionsAndTransforms();
};
}
/// <summary>
/// Adds a set of animations corresponding to the
/// turnstile feather forward in effect.
/// </summary>
/// <param name="storyboard">
/// The storyboard where the animations
/// will be added.
/// </param>
private static void ComposeForwardInStoryboard(Storyboard storyboard)
{
int counter = 0;
PhoneApplicationFrame root = Application.Current.RootVisual as PhoneApplicationFrame;
foreach (WeakReference r in _featheringTargets)
{
FrameworkElement element = (FrameworkElement)r.Target;
double originalOpacity = element.Opacity;
TurnstileFeatherEffect.SetOriginalOpacity(element, originalOpacity);
// Hide the element until the storyboard is begun.
element.Opacity = 0.0;
if (!TryAttachProjectionAndTransform(root, element))
{
continue;
}
DoubleAnimation doubleAnimation = new DoubleAnimation()
{
Duration = TimeSpan.FromMilliseconds(ForwardInFeatheringDuration),
From = ForwardInFeatheringAngle,
To = 0.0,
BeginTime = TimeSpan.FromMilliseconds(ForwardInFeatheringDelay * counter),
EasingFunction = TurnstileFeatheringExponentialEaseOut
};
Storyboard.SetTarget(doubleAnimation, element);
Storyboard.SetTargetProperty(doubleAnimation, RotationYPropertyPath);
storyboard.Children.Add(doubleAnimation);
doubleAnimation = new DoubleAnimation()
{
Duration = TimeSpan.Zero,
From = 0.0,
To = TurnstileFeatherEffect.GetOriginalOpacity(element),
BeginTime = TimeSpan.FromMilliseconds(ForwardInFeatheringDelay * counter)
};
Storyboard.SetTarget(doubleAnimation, element);
Storyboard.SetTargetProperty(doubleAnimation, OpacityPropertyPath);
storyboard.Children.Add(doubleAnimation);
counter++;
}
}