//----------------------------------------------------------------------
//
// Internal Methods
//
//----------------------------------------------------------------------
#region Internal Methods
/// <summary>
///
/// </summary>
internal object StateChangedCallback(object arg)
{
object[] argArray = arg as object[];
HostStateFlags stateFlags = (HostStateFlags)argArray[0];
//
// Check if world transform of the host has changed and
// update cached value accordingly.
//
if ((stateFlags & HostStateFlags.WorldTransform) != 0)
{
_worldTransform = (Matrix)argArray[1];
}
//
// Check if clip bounds have changed, update cached value.
//
if ((stateFlags & HostStateFlags.ClipBounds) != 0)
{
_worldClipBounds = (Rect)argArray[2];
}
//
// Set corresponding flags on the root visual and schedule
// render if one has not already been scheduled.
//
if (_rootVisual.Value != null)
{
//
// When replacing the root visual, we need to re-realize all
// content in the new tree
//
Visual.PropagateFlags(
_rootVisual.Value,
VisualFlags.IsSubtreeDirtyForPrecompute,
VisualProxyFlags.IsSubtreeDirtyForRender
);
}
return(null);
}