private static void DefaultButtonChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var uiElement = d as UIElement;
var button = e.NewValue as Button;
if (uiElement != null && button != null)
{
// when KeyDown event fires with Key.Enter, set focus to the default button
// and set fireClickEvent to true
uiElement.KeyDown += (sender, arg) =>
{
if (arg.Key == Key.Enter && button.IsEnabled)
{
fireClickEvent = true;
button.Focus();
}
};
// when the GetFocus event fires for the default button, invoke the click event
// when fireClickEvent is true
button.GotFocus += (s, argument) =>
{
// if fireClickEvent is true, this event is trigger by
// the KeyDown event with Key.Enter from uiElement
if (fireClickEvent)
{
var peer = new ButtonAutomationPeer(button);
if (peer.IsEnabled())
{
var invokeProv = peer.GetPattern(PatternInterface.Invoke) as IInvokeProvider;
if (invokeProv != null)
{
invokeProv.Invoke();
}
}
// set fireClickEvent back to false
fireClickEvent = false;
}
};
}
}
