private static void OnAcceleratorChanged(DependencyObject dpo, DependencyPropertyChangedEventArgs e)
{
if (Designer.InDesignMode)
{
return;
}
Control owner = dpo as Control;
if (owner == null)
{
return;
}
// Remove any existing accelerator lists for this control, or
// dead entries which are not valid anymore.
foreach (var entry in ActiveAccelerators
.Where(ac => ac.Item2 == owner).ToList())
{
ActiveAccelerators.Remove(entry);
}
if (e.NewValue != null)
{
string keyText = e.NewValue.ToString();
var watchFor = ParseKeys(keyText);
if (watchFor != null && watchFor.Count > 0)
{
owner.Unloaded += OwnerOnUnloaded;
ActiveAccelerators.Add(Tuple.Create(watchFor, owner));
// Set the accelerator/access key for automation
if (watchFor.Contains(VirtualKey.Menu) &&
!watchFor.Contains(VirtualKey.Control))
{
AutomationProperties.SetAcceleratorKey(owner, keyText);
}
else if (watchFor.Contains(VirtualKey.Control) &&
!watchFor.Contains(VirtualKey.Menu))
{
AutomationProperties.SetAccessKey(owner, keyText);
}
}
if (ActiveAccelerators.Count == 1)
{
Window.Current.Dispatcher.AcceleratorKeyActivated += DispatcherOnAcceleratorKeyActivated;
Window.Current.CoreWindow.Activated += CoreWindowOnActivated;
}
}
else
{
owner.Unloaded -= OwnerOnUnloaded;
if (ActiveAccelerators.Count == 0)
{
Window.Current.Dispatcher.AcceleratorKeyActivated -= DispatcherOnAcceleratorKeyActivated;
Window.Current.CoreWindow.Activated -= CoreWindowOnActivated;
}
}
}