private void OnKeyTipExactMatch(DependencyObject exactMatchElement)
{
if (!((bool)(exactMatchElement.GetValue(UIElement.IsEnabledProperty))))
{
Menu.MenuRibbon.Beep();
_prefixText = string.Empty;
return;
}
HideCurrentShowingKeyTips();
_prefixText = string.Empty;
// KeyTips might have been dismissed by one of the event handlers
// hence check again.
if (State == KeyTipState.None)
{
return;
}
var oldFocus = Keyboard.FocusedElement;
var args = new KeyTipAccessedEventArgs();
args.RoutedEvent = PreviewKeyTipAccessedEvent;
IInputElement inputElement = exactMatchElement as IInputElement;
if (inputElement != null)
{
inputElement.RaiseEvent(args);
args.RoutedEvent = KeyTipAccessedEvent;
inputElement.RaiseEvent(args);
}
object newFocus = Keyboard.FocusedElement;
DependencyObject newScope = args.TargetKeyTipScope;
if (newScope != null && !KeyTipService.GetIsKeyTipScope(newScope) && newScope != globalScope)
{
throw new InvalidOperationException();
}
if (newScope == null && KeyTipService.GetIsKeyTipScope(exactMatchElement))
{
newScope = exactMatchElement;
}
if (newScope != null)
{
// Show KeyTips for new scope in a dispatcher operation.
Dispatcher.CurrentDispatcher.BeginInvoke((Action)(() => PushKeyTipsScope(newScope, true)), DispatcherPriority.Loaded);
}
else
{
LeaveKeyTipMode(oldFocus == newFocus /*restoreFocus*/);
}
}
protected virtual void OnKeyTipAccessed(KeyTipAccessedEventArgs e)
{
if (e.OriginalSource != this)
{
return;
}
OnClick();
e.Handled = true;
if (IsOpen && KeyTipService.GetIsKeyTipScope(this))
{
e.TargetKeyTipScope = this;
}
}