private static void OnIsRectSelectionEnabledChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
{
if (!(sender is ListBox))
{
throw new ArgumentException("sender", "Target should be a ListBox and its sub class instance.");;
}
bool isEnabled = (bool)e.NewValue;
if (isEnabled)
{
ListBoxRectSelection rectSelection = ListBoxExtention.GetRectSelection(sender);
if (rectSelection == null)
{
rectSelection = new ListBoxRectSelection(sender as ListView);
ListBoxExtention.SetRectSelection(sender, rectSelection);
}
rectSelection.IsEnabled = isEnabled;
}
}
private static void SetRectSelection(DependencyObject obj, ListBoxRectSelection value)
{
obj.SetValue(RectSelectionProperty, value);
}
