JMSL Chart Programmer's Guide

Picture-in-Picture

Picture-in-Picture

The picture-in-picture effect can be obtained by using the Viewport attribute. This sets the fraction of the screen into which the chart is to be drawn. The Viewport attribute's value is a double[4] containing {xmin, xmax, ymin, ymax}, on a [0,1] by [0,1] grid with (0,0) at the top-left.

This chart tree for the above picture consists of a chart with an AxisXY child and a Pie child. (The Pie class is a subclass of Axis.) The Viewport attribute of the Pie node is set to a non-default value.

import com.imsl.chart.*;
import java.awt.Color;

public class SamplePnP extends JFrameChart {
    
    public SamplePnP() {
        Chart chart = getChart();
        createLineChart(chart);
        createPieChart(chart);
    }
    
    private void createLineChart(Chart chart) {
        AxisXY axis = new AxisXY(chart);
        
        int    npoints = 20;
        double dx = 0.5 * Math.PI/(npoints-1);
        double x[] = new double[npoints];
        double y[] = new double[npoints];
        for (int i = 0;  i < npoints;  i++){
            x[i] = i * dx;
            y[i] = Math.sin(x[i]);
        }
        new Data(axis, x, y);
    }
    
    private void createPieChart(Chart chart) {        
        double y[] = {10., 20., 30., 40.};
        Pie pie = new Pie(chart, y);
        pie.setLabelType(pie.LABEL_TYPE_TITLE);
        pie.setViewport(0.5, 0.9, 0.3, 0.8);
        
        PieSlice[] slice = pie.getPieSlice();
        
        slice[0].setTitle("Red");
        slice[0].setFillColor(Color.red);
        slice[0].setExplode(.2);

        slice[1].setTitle("Blue");
        slice[1].setFillColor(Color.blue);

        slice[2].setTitle("Black");
        slice[2].setFillColor(Color.black);

        slice[3].setTitle("Green");
        slice[3].setFillColor(Color.green);
    }
    
    public static void main(String argv[]) {
        new SamplePnP().setVisible(true);
    }
}

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