!7

lib 1400104 // XChart

import org.knowm.xchart.*;

sclass XChartRealTimeTest > DynModule {
  transient double phase = 0;
  
  JComponent visualize() {
    double[][] initdata = getSineData(phase);

    // Create Chart
    final XYChart chart = QuickChart.getChart("Simple XChart Real-time Demo", "Radians", "Sine", "sine", initdata[0], initdata[1]);

    final JComponent panel = new XChartPanel(chart);
    awtEvery(panel, 200, r {
      phase += 2 * Math.PI * 2 / 20.0;
      double[][] data = getSineData(phase);

      chart.updateXYSeries("sine", data[0], data[1], null);
      revalidate(panel);
    });
    ret panel;
  }

  double[][] getSineData(double phase) {
    double[] xData = new double[100];
    double[] yData = new double[100];
    for i over xData: {
      double radians = phase + (2 * Math.PI / xData.length * i);
      xData[i] = radians;
      yData[i] = Math.sin(radians);
    }
    ret new double[][] { xData, yData };
  }
}