@Override
    public int triggerHashCode() {
        return mouseButtonHash(mouseButton);
    }
Create a new <code>MouseButtonTrigger</code> to receive mouse button events.

@param mouseButton Mouse button index. See BUTTON_*** constants in
{@link MouseInput}.
jme3-core/src/main/java/com/jme3/input/controls/MouseButtonTrigger.java