/// <summary>
/// Set the IsSubmenuOpen property value at the right time.
/// </summary>
private static Object CoerceIsSubmenuOpen(DependencyObject element, Object value)
{
SplitButton splitButton = element as SplitButton;
if ((Boolean)value)
{
if (!splitButton.IsLoaded)
{
splitButton.Loaded += delegate(Object sender, RoutedEventArgs e)
{
splitButton.CoerceValue(IsSubmenuOpenProperty);
};
return(BooleanBoxes.FalseBox);
}
}
return((Boolean)value && splitButton.HasItems);
}
private static void OnMenuItemClick(Object sender, RoutedEventArgs e)
{
SplitButton splitButton = sender as SplitButton;
MenuItem menuItem = e.OriginalSource as MenuItem;
// To make the ButtonClickEvent get fired as we expected, you should mark the ClickEvent
// as handled to prevent the event from poping up to the button portion of the SplitButton.
if (menuItem != null && !typeof(MenuItem).IsAssignableFrom(menuItem.Parent.GetType()))
{
e.Handled = true;
}
if (menuItem != null && splitButton != null)
{
if (splitButton.IsSubmenuOpen)
{
splitButton.CloseSubmenu();
}
}
}
private static void OnIsSubmenuOpenChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
SplitButton splitButton = sender as SplitButton;
if ((Boolean)e.NewValue)
{
if (Mouse.Captured != splitButton)
{
Mouse.Capture(splitButton, CaptureMode.SubTree);
}
}
else
{
if (Mouse.Captured == splitButton)
{
Mouse.Capture(null);
}
if (splitButton.IsKeyboardFocused)
{
splitButton.Focus();
}
}
}
