JPanel中可调整大小的JFreeChart

Question

public class DynamicLineAndTimeSeriesChart extends JPanel implements ActionListener {
    private ArrayList<TimeSeries> Series = new ArrayList<TimeSeries>();
    private ArrayList<Double> Last = new ArrayList<Double>();
    private String Id1;
    private Timer timer = new Timer(250, this);
    public DynamicLineAndTimeSeriesChart(String id) {

        Runtime runtime = Runtime.getRuntime();
        int NoOfProc = runtime.availableProcessors();
        for (int i = 0; i < NoOfProc; i++) {
            Last.add(new Double(100.0));
            Series.add(new TimeSeries("Core" + i, Millisecond.class));
        }
        Id1 = id;
        final TimeSeriesCollection dataset = new TimeSeriesCollection();
        for (int i = 0; i < NoOfProc; i++) {
            dataset.addSeries(this.Series.get(i));
        }
        final JFreeChart chart = createChart(dataset);
        timer.setInitialDelay(1000);
        chart.setBackgroundPaint(Color.LIGHT_GRAY);

        //Created JPanel to show graph on screen
        final JPanel content = new JPanel(new GridLayout());
        final ChartPanel chartPanel = new ChartPanel(chart);
        content.add(chartPanel, BorderLayout.CENTER);
        content.revalidate();
        this.add(content);

        timer.start();
    }

JPanel main = new JPanel(new BorderLayout());
main.add(demo);
jTabbedPane1.add("Core", main);
demo.setVisible(true);

框架设计采用NetBeans进行。我尝试了所有的解决方案，比如将布局从BorderLayout更改为GridBagLayout，甚至是这里提到的那个。

Answer 1

borderlayout.center应该让chartpanel随着框架大小的调整而增长。我猜您有一个JPanel和一个FlowLayout，它继续使用图表面板的首选大小。由于flowlayout是默认值，您可能必须查找它。

编辑：这里有一个完整的示例，它将折线图添加到选项卡式窗格中。

编辑：您的DynamicLineAndTimeSeriesChart具有默认的FlowLayout；我想您需要一个GridLayout。

public DynamicLineAndTimeSeriesChart(String id) {
    this.setLayout(new GridLayout());
    …
}