private void OnPostProcessKey(object sender, KeyEventArgs e)
{
if (e.Handled)
{
return;
}
FocusNavigationDirection navigationDirection;
DependencyProperty navigationModeProperty;
if (TryGetNavigationMode(e, out navigationModeProperty, out navigationDirection))
{
UIElement currentTarget = (UIElement)presentationSource.KeyboardDevice.Target ?? presentationSource.RootElement;
UIElement newTarget = (UIElement)KeyboardNavigationTarget.FindTarget(currentTarget, navigationDirection, navigationModeProperty);
if (currentTarget != newTarget && newTarget != null)
{
newTarget.Focus();
}
e.Handled = true;
}
}
