TabbedPane.java 文件源码

TabbedPane(MainWindow window) {
    mainWindow = window;

    setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);

    addMouseWheelListener(new MouseWheelListener() {
        public void mouseWheelMoved(MouseWheelEvent e) {
            int direction = e.getWheelRotation();
            int index = getSelectedIndex();
            int maxIndex = getTabCount() - 1;
            if ((index == 0 && direction < 0)
                    || (index == maxIndex && direction > 0)) {
                index = maxIndex - index;
            } else {
                index += direction;
            }
            setSelectedIndex(index);
        }
    });
}