protected internal override void BeginTransition(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
{
TranslateTransform tt = new TranslateTransform(StartPoint.X * transitionElement.ActualWidth, StartPoint.Y * transitionElement.ActualHeight);
if (IsNewContentTopmost)
newContent.RenderTransform = tt;
else
oldContent.RenderTransform = tt;
DoubleAnimation da = new DoubleAnimation(EndPoint.X * transitionElement.ActualWidth, Duration);
tt.BeginAnimation(TranslateTransform.XProperty, da);
da.To = EndPoint.Y * transitionElement.ActualHeight;
da.Completed += delegate
{
EndTransition(transitionElement, oldContent, newContent);
};
tt.BeginAnimation(TranslateTransform.YProperty, da);
}
//Transitions can override this to perform cleanup at the end of the transition
protected virtual void OnTransitionEnded(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
{
}
//Transitions should call this method when they are done
protected void EndTransition(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
{
OnTransitionEnded(transitionElement, oldContent, newContent);
transitionElement.OnTransitionCompleted();
}
// Called when an element is Removed from the TransitionPresenter's visual tree
protected internal virtual void BeginTransition(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
{
EndTransition(transitionElement, oldContent, newContent);
}
protected override void OnTransitionEnded(TransitionPresenter transitionElement, ContentPresenter oldContent, ContentPresenter newContent)
{
newContent.ClearValue(ContentPresenter.RenderTransformProperty);
oldContent.ClearValue(ContentPresenter.RenderTransformProperty);
}