ScrollAction.java 文件源码

@Override
public void mouseWheelMoved( MouseWheelEvent e ) {
    if( !isEnabled() )
        return;
    int rotation = e.getWheelRotation();
    if( (rotation < 0 && isScrollLeft)
            || (rotation > 0 && !isScrollLeft ) ) {
        int increment = getDefaultIncrement();
        increment *= Math.abs( rotation );
        scroll( increment );
        e.consume();
    }
}