public void ShowAnswer()
{
FrameworkElement answerContainer = ViewHelpers.FindSiblingByName(this, this.AnswerContainerName);
Dispatcher.BeginInvoke(() =>
{
IEasingFunction easeOut = new QuarticEase()
{
EasingMode = EasingMode.EaseOut
};
Storyboard sb = new Storyboard();
// Animate the height
DoubleAnimation heightAnim = new DoubleAnimation()
{
From = 0,
To = this.AnswerContainerHeight,
Duration = TimeSpan.FromMilliseconds(750),
EasingFunction = easeOut,
};
Storyboard.SetTargetProperty(heightAnim, new PropertyPath(FrameworkElement.HeightProperty));
Storyboard.SetTarget(heightAnim, answerContainer);
sb.Children.Add(heightAnim);
// 'Animate' the visibility
ObjectAnimationUsingKeyFrames visibilityAnim = new ObjectAnimationUsingKeyFrames();
visibilityAnim.KeyFrames.Add(new DiscreteObjectKeyFrame()
{
KeyTime = TimeSpan.FromMilliseconds(0),
Value = Visibility.Visible,
});
Storyboard.SetTarget(visibilityAnim, answerContainer);
Storyboard.SetTargetProperty(visibilityAnim, new PropertyPath(FrameworkElement.VisibilityProperty));
sb.Children.Add(visibilityAnim);
// Add child animations
//var children = ViewHelpers.GetChildren(answerContainer);
//double offset = 0;
//foreach (FrameworkElement child in children)
//{
// offset += 100;
// DoubleAnimation rotAnim = new DoubleAnimation()
// {
// From = 90,
// To = 0,
// Duration = TimeSpan.FromMilliseconds(1000),
// EasingFunction = easeOut,
// BeginTime = TimeSpan.FromMilliseconds(offset),
// };
// Storyboard.SetTargetProperty(rotAnim, new PropertyPath(PlaneProjection.RotationXProperty));
// Storyboard.SetTarget(rotAnim, child);
// sb.Children.Add(rotAnim);
//}
sb.Begin();
});
}
