jmathplot在swing应用程序中不起作用

问题描述

我正在尝试在摆动应用程序中使用 jmathplot 库.

I'm trying to use the jmathplot library in a swing application.

问题是，当我按如下所示将其添加到JPanel时，它似乎不起作用:

Problem is, it doesn't seem to work when I add it to a JPanel as follows:

    // create your PlotPanel (you can use it as a JPanel)
    double[] x = new double[] { 0, 1, 2, 3, 4, 5 };
    double[] y = new double[] { 10, 11, 12, 14, 15, 16 };


    // create your PlotPanel (you can use it as a JPanel)
    Plot2DPanel graph = new Plot2DPanel();
    graph.setBounds(0, 0, 782, 272);

    // add a line plot to the PlotPanel
    graph.addLinePlot("my plot", x, y);

    JPanel panel = new JPanel();
    panel.setBounds(10, 333, 782, 272);
    tab_analysis.add(panel);
    panel.setLayout(null);
    panel.add(graph);

因为该图未显示，并且我也得到了奇怪的轴:

Because the plot doesn't show up and I get weird axes as well:

该网站指出:

use the PlotPanel as any Swing component (all PlotPanel extends JPanel, in fact)

我该怎么办?

推荐答案

• 可以与NullLayout一起使用，没有任何问题，但是我对这个布局管理器并不熟悉(从父级中删除Insets)，然后我会留下关于

  • works with NullLayout, without any issue, but I'm quite not familair with this layout manager (delegate Insets from parent), then I'm leaving any comments about

    简单不要使用NullLayout

    为Plot2DPanel

    JPanel具有FLowLayout(在调整大小时与NullLayout！的输出相同)，仅接受PreferredSize，子对象的容器大小不可调整，必须使用BorderLayout /GridLayout用于简单图形

    JPanel has FLowLayout (with the same output as from NullLayout! on resize), accepting only PreferredSize, child aren't resizable with its contianer, is required to use BorderLayout/GridLayout for simple graph

    .

    .

    .

    来自代码

    import java.awt.BorderLayout;
    import java.awt.Dimension;
    import javax.swing.JFrame;
    import javax.swing.JPanel;
    import javax.swing.SwingUtilities;
    import org.math.plot.Plot2DPanel;
    
    public class MyPlot {
    
        private JFrame frame = new JFrame("JMathPlot library in a swing application.");
        private JPanel panel = new JPanel();
    
        public MyPlot() {
            double[] x = new double[]{0, 1, 2, 3, 4, 5};
            double[] y = new double[]{10, 11, 12, 14, 15, 16};
            Plot2DPanel plot = new Plot2DPanel() {
                @Override
                public Dimension getPreferredSize() {
                    return new Dimension(400, 200);
                }
            };
            plot.addLinePlot("my plot", x, y); // add a line plot to the PlotPanel
            panel.setLayout(new BorderLayout());
            panel.add(plot);
            frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
            frame.add(panel);
            frame.pack();
            frame.setLocation(150, 150);
            frame.setVisible(true);
        }
    
        public static void main(String[] args) {
    
            SwingUtilities.invokeLater(new Runnable() {
                @Override
                public void run() {
                    new MyPlot();
                }
            });
        }
    }
    

    这篇关于jmathplot在swing应用程序中不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！