static void OnCreateContentChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
BackgroundVisualHost bvh = (BackgroundVisualHost)d;
if (bvh.IsContentShowing)
{
bvh.HideContentHelper();
if (e.NewValue != null)
{
bvh.CreateContentHelper();
}
}
}
public ThreadedVisualHelper(
CreateContentFunction createContent,
Action invalidateMeasure,
BackgroundVisualHost parent)
{
_parent = parent;
_hostVisual = new HostVisual();
_createContent = createContent;
_invalidateMeasure = invalidateMeasure;
Thread backgroundUi = new Thread(CreateAndShowContent);
backgroundUi.SetApartmentState(ApartmentState.STA);
backgroundUi.Name = "BackgroundVisualHostThread";
backgroundUi.IsBackground = true;
backgroundUi.Start();
updatePropsCTS = new CancellationTokenSource();
_sync.WaitOne();
}
