private static void OnKeyTipChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
bool newHasValue = !string.IsNullOrEmpty((string)e.NewValue);
bool oldHasValue = !string.IsNullOrEmpty((string)e.OldValue);
if (newHasValue != oldHasValue)
{
RoutedEventHandler onLoadedChanged = (o, ev) =>
{
if (newHasValue && d.IsLoaded())
{
Current.scopeToElementMap.AddItem(d);
}
else
{
Current.scopeToElementMap.RemoveItem(d);
}
};
if (newHasValue)
{
Current.mTargets.Add(d);
d.AddLoadedHandler(onLoadedChanged, onLoadedChanged);
}
else
{
Current.mTargets.Remove(d);
d.RemoveLoadedHandler(onLoadedChanged, onLoadedChanged);
}
onLoadedChanged(null, null);
}
}
