public static IDisposable AddMenuTemporarily(FrameworkElement element, Optional <Menu> menu, IScheduler dispatcher)
{
if (!menu.HasValue)
{
element.ContextMenu = null;
return(Disposable.Empty);
}
element.ContextMenu = new System.Windows.Controls.ContextMenu();
var dispose = Disposable.Empty;
element.ContextMenu.IsVisibleChanged += (sender, e) =>
{
if ((bool)e.NewValue)
{
dispose.Dispose();
element.ContextMenu.Items.Clear();
dispose = WindowsMenuBuilder.PopulateContextMenu(menu.Value, element.ContextMenu, null, dispatcher);
}
else
{
dispose.Dispose();
element.ContextMenu.Items.Clear();
dispose = Disposable.Empty;
}
};
return(Disposable.Create(() => dispose.Dispose()));
}
