void MenuItemNew_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
MenuItemNew curItem = sender as MenuItemNew;
System.Diagnostics.Debug.WriteLine("Role = " + curItem.Role);
Path pth = e.OriginalSource as Path;
if (pth == null)
{
return;
}
DependencyObject parent = VisualTreeHelper.GetParent(pth);
while (parent as MenuItemNew == null)
{
parent = VisualTreeHelper.GetParent(parent);
}
MenuItemNew actualSource = parent as MenuItemNew;
if (actualSource.Role == MenuItemRole.TopLevelHeader)
{
IsExpanderClicked = !IsExpanderClicked;
actualSource.CoerceValue(MenuItemNew.IsSubmenuOpenProperty);
}
if (curItem.Role == MenuItemRole.SubmenuHeader)
{
IsExpanderClicked = !IsExpanderClicked;
curItem.CoerceValue(MenuItemNew.IsSubmenuOpenProperty);
}
}
private static object CoerceIsSubmenuOpen(DependencyObject d, object value)
{
MenuItemNew item = (MenuItemNew)d;
if ((bool)value)
{
if (item.IsMouseOver)
{
System.Diagnostics.Debug.WriteLine(item.IsExpanderClicked.ToString());
return(item.IsExpanderClicked);
}
if (!item.IsLoaded)
{
item.Loaded += (s, e) =>
{
Application.Current.Dispatcher.BeginInvoke(DispatcherPriority.Input, new DispatcherOperationCallback(delegate(object param)
{
item.CoerceValue(MenuItemNew.IsSubmenuOpenProperty);
return(null);
}), null);
};
return(false);
}
}
if (item.IsExpanderClicked)
{
return(true);
}
return(value);
}
