private static void OnPreviewLostKeyboardFocus(object sender, KeyboardFocusChangedEventArgs args)
{
if (!IsCurrentThreadMainUiThread())
{
return;
}
if (!(sender is DependencyObject element) || !IsRegisteredCommandFocusElement(element) ||
_restoreFocusScope == null || !IsCommandContainerLosingFocus(args.OldFocus, args.NewFocus) ||
args.NewFocus == null)
{
return;
}
var restoreFocusScope = _restoreFocusScope;
_restoreFocusScope = null;
if (IsAttachedCommandFocusElement(element))
{
return;
}
if (((FrameworkElement)sender).FindAncestor <AnchorableToolBarTray>() == null)
{
restoreFocusScope.PerformRestoration();
}
args.Handled = true;
}
private static void OnPreviewGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs args)
{
if (!IsCurrentThreadMainUiThread())
{
return;
}
if (!(sender is DependencyObject dependencyObject) || !IsRegisteredCommandFocusElement(dependencyObject))
{
return;
}
if (_restoreFocusScope == null && IsCommandContainerGainingFocus(args.OldFocus, args.NewFocus))
{
if (!IsAttachedCommandFocusElement(dependencyObject))
{
CurrentMenuModeSource = PresentationSource.FromDependencyObject(dependencyObject);
}
_restoreFocusScope = new CommandRestoreFocusScope(args.OldFocus);
}
if (PresentationSource.FromDependencyObject(dependencyObject) != null)
{
return;
}
args.Handled = true;
}
private static void OnContextMenuClosed(object sender, RoutedEventArgs e)
{
if (!IsCurrentThreadMainUiThread() || _restoreFocusScope == null ||
!IsCommandContainerLosingFocus(e.Source as IInputElement, Keyboard.FocusedElement))
{
return;
}
CurrentMenuModeSource = null;
var restoreFocusScope = _restoreFocusScope;
_restoreFocusScope = null;
restoreFocusScope.PerformRestoration();
}
private void HandleRestoreFocusCore()
{
_isPendingRestoreFocus = false;
if (ShouldRestoreFocus())
{
if (RestoreFocusScope != null)
{
RestoreFocusScope.PerformRestoration();
}
else
{
Keyboard.Focus(null);
}
}
if (ShouldSynchronizeActivation())
{
// WindowManagerService.Instance.ActivateFrameFromSource(this.Source);
}
_cancelRestoreFocus = false;
}
public static void CancelRestoreFocus()
{
_restoreFocusScope = null;
}
