/// <summary>
/// Processes a double animation looking for special values.
/// </summary>
/// <param name="da">The double animation instance.</param>
private void ProcessDoubleAnimation(DoubleAnimation da)
{
// Look for a special value in the To property.
if (da.To.HasValue)
{
var d = DoubleAnimationToAdapter.GetDimensionFromIdentifyingValue(da.To.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationToAdapter(d.Value, da));
}
}
// Look for a special value in the From property.
if (da.From.HasValue)
{
var d = DoubleAnimationFromAdapter.GetDimensionFromIdentifyingValue(da.To.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationFromAdapter(d.Value, da));
}
}
}
private void ProcessDoubleAnimation(DoubleAnimation da)
{
if (da.To.HasValue)
{
var d = DoubleAnimationToAdapter.GetDimensionFromIdentifyingValue(da.To.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationToAdapter(d.Value, da));
}
}
if (da.From.HasValue)
{
if (da.To != null)
{
var d = DoubleAnimationFromAdapter.GetDimensionFromIdentifyingValue(da.To.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationFromAdapter(d.Value, da));
}
}
}
}
/// <summary>
/// Walks through the known storyboards in the control's template that
/// may contain identifying values, storing them for future
/// use and updates.
/// </summary>
void UpdateAnyAnimationValues()
{
if (_knownHeight > 0 && _knownWidth > 0)
{
// Initially, before any special animations have been found,
// the visual state groups of the control must be explored.
// By definition they must be at the implementation root of the
// control.
if (_specialAnimations == null)
{
_specialAnimations = new List <AnimationValueAdapter>();
foreach (VisualStateGroup group in VisualStateManager.GetVisualStateGroups(this))
{
if (group == null)
{
continue;
}
foreach (VisualState state in group.States)
{
if (state != null)
{
Storyboard sb = state.Storyboard;
if (sb != null)
{
// Examine all children of the storyboards,
// looking for either type of double
// animation.
foreach (Timeline timeline in sb.Children)
{
DoubleAnimation da = timeline as DoubleAnimation;
DoubleAnimationUsingKeyFrames dakeys = timeline as DoubleAnimationUsingKeyFrames;
if (da != null)
{
// Look for a special value in the To property.
if (da.To.HasValue)
{
var d = DoubleAnimationToAdapter.GetDimensionFromIdentifyingValue(da.To.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationToAdapter(d.Value, da));
}
}
// Look for a special value in the From property.
if (da.From.HasValue)
{
var d = DoubleAnimationFromAdapter.GetDimensionFromIdentifyingValue(da.To.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationFromAdapter(d.Value, da));
}
}
}
else if (dakeys != null)
{
// Look through all keyframes in the instance.
foreach (DoubleKeyFrame frame in dakeys.KeyFrames)
{
var d = DoubleAnimationFrameAdapter.GetDimensionFromIdentifyingValue(frame.Value);
if (d.HasValue)
{
_specialAnimations.Add(new DoubleAnimationFrameAdapter(d.Value, frame));
}
}
}
}
}
}
}
}
}
// Update special animation values relative to the current size.
foreach (AnimationValueAdapter adapter in _specialAnimations)
{
adapter.UpdateWithNewDimension(_knownWidth, _knownHeight);
}
// HACK: force storyboard to use new values
foreach (VisualStateGroup group in VisualStateManager.GetVisualStateGroups(this))
{
if (group == null)
{
continue;
}
foreach (VisualState state in group.States)
{
if (state != null)
{
Storyboard sb = state.Storyboard;
if (sb != null)
{
// need to kick the storyboard, otherwise new values are not taken into account.
// it's sad, really don't want to start storyboards in vsm, but I see no other option
sb.Begin(this);
}
}
}
}
}
}