|
private static GetAttachedTransform ( |
||
| obj | The dependency object. | |
| return | ||
/// <summary>
/// Attach the translate transform that is used
/// for the slide in effect to a framework element.
/// </summary>
/// <param name="element">The framework element.</param>
private static void AttachTransform(FrameworkElement element)
{
Transform originalTransform = element.RenderTransform;
TranslateTransform translateTransform = SlideInEffect.GetAttachedTransform(element);
if (translateTransform == null)
{
translateTransform = new TranslateTransform()
{
X = 0
};
if (originalTransform == null)
{
element.RenderTransform = translateTransform;
}
else
{
TransformGroup transformGroup = new TransformGroup();
transformGroup.Children.Add(originalTransform);
transformGroup.Children.Add(translateTransform);
element.RenderTransform = transformGroup;
}
SlideInEffect.SetAttachedTransform(element, translateTransform);
}
}
/// <summary>
/// Adds an animation corresponding to an specific framework element.
/// Thus, the storyboard can be composed piece by piece.
/// </summary>
/// <param name="element">The framework element.</param>
/// <param name="leftToRight">
/// Indicates whether the animation should go
/// from left to right or viceversa.
/// </param>
/// <param name="storyboard">A reference to the storyboard.</param>
private static void ComposeStoryboard(FrameworkElement element, bool leftToRight, ref Storyboard storyboard)
{
double xPosition = SlideInEffect.GetLineIndex(element) * ProportionalOffset;
double from = leftToRight ? xPosition : -xPosition;
TranslateTransform translateTransform = SlideInEffect.GetAttachedTransform(element);
DoubleAnimationUsingKeyFrames animation = new DoubleAnimationUsingKeyFrames();
LinearDoubleKeyFrame keyFrame1 = new LinearDoubleKeyFrame();
keyFrame1.KeyTime = TimeSpan.Zero;
keyFrame1.Value = from;
animation.KeyFrames.Add(keyFrame1);
LinearDoubleKeyFrame keyFrame2 = new LinearDoubleKeyFrame();
keyFrame2.KeyTime = TimeSpan.FromMilliseconds(BeginTime);
keyFrame2.Value = from;
animation.KeyFrames.Add(keyFrame2);
LinearDoubleKeyFrame keyFrame3 = new LinearDoubleKeyFrame();
keyFrame3.KeyTime = TimeSpan.FromMilliseconds(BreakTime);
keyFrame3.Value = from * ExponentialInterpolationWeight;
animation.KeyFrames.Add(keyFrame3);
EasingDoubleKeyFrame keyFrame4 = new EasingDoubleKeyFrame();
keyFrame4.KeyTime = TimeSpan.FromMilliseconds(EndTime);
keyFrame4.Value = 0.0;
keyFrame4.EasingFunction = SlideInExponentialEase;
animation.KeyFrames.Add(keyFrame4);
Storyboard.SetTarget(animation, translateTransform);
Storyboard.SetTargetProperty(animation, XPropertyPath);
storyboard.Children.Add(animation);
}