单击 JfreeChart 折线图按钮上的放大和缩小功能？

基本上我希望线图被放大和缩小（总共4个按钮，2个用于X轴（放大和缩小），另外两个用于Y轴）沿着任何轴单击按钮，就像绘制图形一样在负 x 轴和负 Y 轴区域，根据数据点，然后单击按钮，图形应根据按钮单击沿负 x 轴或负 Y 轴放大和缩小。

我怎样才能实现这一点？任何带有详细解释的示例代码都会很有帮助！

 private JButton createZoom()
 {
        final JButton auto = new JButton("ZOOMIN");
        auto.setActionCommand("ZOOM_IN_DOMAIN");
        auto.addActionListener(new ChartPanel(chart));
        return auto;
    }

Each button's Action https://docs.oracle.com/javase/tutorial/uiswing/misc/action.html implementation should invoke the corresponding method used by ChartPanel http://www.jfree.org/jfreechart/api/javadoc/org/jfree/chart/ChartPanel.html to create it's popup menu of zoom commands. The implementation of actionPerformed() http://www.jfree.org/jfreechart/api/javadoc/src-html/org/jfree/chart/ChartPanel.html#line.1694 is a convenient guide to the available zooming functionality. For example, the ZOOM_IN_DOMAIN_COMMAND is handled by invoking zoomInDomain(). Based on this example https://stackoverflow.com/a/5522583/230513, a typical Zoom X handler relative to the origin is shown below:

private JButton createZoom() {
    final JButton zoomX = new JButton(new AbstractAction("Zoom X") {

        @Override
        public void actionPerformed(ActionEvent e) {
            chartPanel.zoomInDomain(0, 0);
        }
    });
    return zoomX;
}

如果默认zoomPoint就足够了，您可以使用图表面板的实现：

private JButton createZoom() {
    final JButton zoomX = new JButton("Zoom X");
    zoomX.setActionCommand(ChartPanel.ZOOM_IN_DOMAIN_COMMAND);
    zoomX.addActionListener(chartPanel);
    return zoomX;
}

相比之下，createZoom()原来的方法example https://stackoverflow.com/a/5522583/230513展示了如何唤起ChartPanel method restoreAutoBounds()，这将恢复两个轴上的自动范围计算。