Gutter.java 文件源码

/**
 * {@inheritDoc}
 */
@Override
public void setComponentOrientation(ComponentOrientation o) {

    // Some LaFs might do fun stuff, resulting in this method being called
    // before a border is installed.

    if (getBorder() instanceof GutterBorder) {
        // Reuse the border to preserve its color.
        if (o.isLeftToRight()) {
            ((GutterBorder)getBorder()).setEdges(0, 0, 0, 1);
        }
        else {
            ((GutterBorder)getBorder()).setEdges(0, 1, 0, 0);
        }
    }
    super.setComponentOrientation(o);
}