private static void CommandProperty_Changed(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
{
var element = dependencyObject as FrameworkElement;
if (element != null)
{
MouseLeftButtonDownBehavior behavior = GetOrCreateBehavior(element);
behavior.Command = e.NewValue as ICommand;
}
}
private static MouseLeftButtonDownBehavior GetOrCreateBehavior(FrameworkElement element)
{
MouseLeftButtonDownBehavior behavior = element.GetValue(MouseLeftButtonDownBehaviorProperty) as MouseLeftButtonDownBehavior;
if (behavior == null)
{
behavior = new MouseLeftButtonDownBehavior(element);
element.SetValue(MouseLeftButtonDownBehaviorProperty, behavior);
}
return(behavior);
}
public static void SetMouseLeftButtonDownBehavior(DependencyObject obj,
MouseLeftButtonDownBehavior value)
{
obj.SetValue(MouseLeftButtonDownBehaviorProperty, value);
}