protected override void PlatformCapture(IInputElement element)
{
var hwnd = ((element?.GetVisualRoot() as TopLevel)?.PlatformImpl as WindowImpl)
?.Handle.Handle;
if (hwnd.HasValue && hwnd != IntPtr.Zero)
{
UnmanagedMethods.SetCapture(hwnd.Value);
}
else
{
UnmanagedMethods.ReleaseCapture();
}
}
protected override void PlatformCapture(IInputElement control)
{
if (control == null)
{
System.Windows.Input.Mouse.Capture(null);
}
else if ((control.GetVisualRoot() as EmbeddableControlRoot)?.PlatformImpl != _impl)
{
throw new ArgumentException("Visual belongs to unknown toplevel");
}
else
{
System.Windows.Input.Mouse.Capture(_impl);
}
}