protected virtual void LoadThreadSeparatedControl()
{
if (SeparateThreadDispatcher != null)
{
return;
}
AutoResetEvent sync = new AutoResetEvent(false);
HostVisual = new HostVisual();
AddLogicalChild(HostVisual);
AddVisualChild(HostVisual);
if (DesignerProperties.GetIsInDesignMode(this))
{
return;
}
var thread = new Thread(() =>
{
TargetElement = CreateThreadSeparatedControl();
if (TargetElement == null)
{
return;
}
VisualTarget = new VisualTargetPresentationSource(HostVisual);
VisualTarget.RootVisual = TargetElement;
Dispatcher.BeginInvoke(new Action(() => { InvalidateMeasure(); }));
sync.Set();
Dispatcher.Run();
VisualTarget.Dispose();
})
{
IsBackground = true
};
thread.SetApartmentState(ApartmentState.STA);
thread.Start();
sync.WaitOne();
}
protected override void LoadThreadSeparatedControl()
{
HostVisual = new HostVisual();
AddLogicalChild(HostVisual);
AddVisualChild(HostVisual);
if (DesignerProperties.GetIsInDesignMode(this))
{
return;
}
CommonDispatcher.BeginInvoke(new Action(() =>
{
lock (_lock)
{
if (HostVisual == null)
{
return; // can happen if control was loaded then immediately unloaded
}
if (TargetElement == null)
{
TargetElement = CreateThreadSeparatedControl();
}
if (TargetElement == null)
{
return;
}
VisualTarget = new VisualTargetPresentationSource(HostVisual);
VisualTarget.RootVisual = TargetElement;
}
Dispatcher.BeginInvoke(new Action(() => { InvalidateMeasure(); }));
}));
}