/// <summary>
/// Called when the NodeModel's CachedValue property is updated
/// </summary>
private void CachedValueChanged()
{
Dispatcher.BeginInvoke(new Action(delegate
{
// There is no preview control or the preview control is
// currently in transition state (it can come back to handle
// the new data later on when it is ready).
// If node is frozen, we shouldn't update cached value.
// We keep value, that was before freezing.
if ((previewControl == null) || ViewModel.IsFrozen)
{
return;
}
// Enqueue an update of the preview control once it has completed its
// transition
if (previewControl.IsInTransition)
{
previewControl.RequestForRefresh();
return;
}
if (previewControl.IsHidden) // The preview control is hidden.
{
previewControl.IsDataBound = false;
return;
}
previewControl.BindToDataSource();
}));
}