// When focus comes from outside the RadioButtons control we will put focus on the selected radio button.
private void OnGettingFocus(object sender, GettingFocusEventArgs args)
{
var repeater = m_repeater;
if (repeater != null)
{
var inputDevice = args.InputDevice;
if (inputDevice == FocusInputDeviceKind.Keyboard)
{
// If focus is coming from outside the repeater, put focus on the selected item.
var oldFocusedElement = args.OldFocusedElement;
if (oldFocusedElement == null || repeater != VisualTreeHelper.GetParent(oldFocusedElement))
{
var selectedItem = repeater.TryGetElement(m_selectedIndex);
if (selectedItem != null)
{
var argsAsIGettingFocusEventArgs2 = args as GettingFocusEventArgs;
if (argsAsIGettingFocusEventArgs2 != null)
{
if (args.TrySetNewFocusedElement(selectedItem))
{
args.Handled = true;
}
}
}
}
// Focus was already in the repeater: in On RS3+ Selection follows focus unless control is held down.
else if (SharedHelpers.IsRS3OrHigher() &&
(Windows.UI.Xaml.Window.Current.CoreWindow.GetKeyState(VirtualKey.Control) &
CoreVirtualKeyStates.Down) != CoreVirtualKeyStates.Down)
{
var newFocusedElementAsUIE = args.NewFocusedElement as UIElement;
if (newFocusedElementAsUIE != null)
{
Select(repeater.GetElementIndex(newFocusedElementAsUIE));
args.Handled = true;
}
}
}
}
}
bool IGettingFocusEventArgsResolver.TrySetNewFocusedElement(GettingFocusEventArgs e, DependencyObject element) => e.TrySetNewFocusedElement(element);
