private static object OnCoerceContextMenu(DependencyObject sender, object value, CoerceValueCallback originCallback)
{
var menu = originCallback?.Invoke(sender, value) ?? value;
if (menu is ContextMenu contextMenu)
{
var ribbon = (Ribbon)sender.GetValue(RibbonProperty);
ribbon?.ValidateContextMenu(contextMenu);
}
return(menu);
}
public DependencyProperty RegisterProperty <T>(
string name,
T defaultValue,
FrameworkPropertyMetadataOptions flags,
PropertyChangedCallback propertyChanged = null,
CoerceValueCallback coerceValue = null)
{
FrameworkPropertyMetadata metadata = new FrameworkPropertyMetadata(
defaultValue,
flags,
(d, e) => propertyChanged?.Invoke((TOwner)d, e),
(d, e) => coerceValue?.Invoke(d, e));
return(DependencyProperty.Register(name, typeof(T), typeof(TOwner), metadata));
}