private AnnotatedChartModel createSineModel() {
DefaultChartModel model = new DefaultChartModel("Sine");
int numIntervals = 36;
for (int i = 0; i <= numIntervals; i++) {
double x = (360.0 * i) / numIntervals;
double y = 20 + 20 * Math.sin(x * 2 * Math.PI / 360.0);
if (y < 0) {
y = 0;
}
ChartPoint p = new ChartPoint(x, y);
model.addPoint(p);
}
// You can just pass a simple string to use as the label, but here we use the html mark-up
ChartLabel label =
new ChartLabel(
new RealPosition(230.0),
new RealPosition(38.5),
"<html>A <span style='color:black'><b><u>Sine</u></b></span> Wave</html>");
label.setRotation(-Math.PI / 6);
label.setColor(Color.gray);
model.addAnnotation(label);
ChartArrow arrow = new ChartArrow(new Point(225, 36), new Point(150, 30));
arrow.setFromPixelOffset(new Point(-30, 0));
model.addAnnotation(arrow);
return model;
}
private AnnotatedChartModel createCosineModel() {
DefaultChartModel model = new DefaultChartModel("Cosine");
int numIntervals = 36;
for (int i = 0; i <= numIntervals; i++) {
double x = (360.0 * i) / numIntervals;
double y = Math.cos(x * 2 * Math.PI / 360.0);
ChartPoint p = new ChartPoint(x, y);
model.addPoint(p);
}
ChartLabel label = new ChartLabel(new RealPosition(75.0), new RealPosition(8.0));
// As before we could simply use a basic string, but we are demonstrating the rich text mark-up
// possibility
label.setLabel(
"<html><p style='text-align:center'>A <span style='color:black'><b><u>Cosine</u></b></span><br>Wave</p></html>");
label.setColor(Color.gray);
model.addAnnotation(label);
ChartArrow arrow = new ChartArrow(new Point(75, 8), new Point(100, 20));
arrow.setFromPixelOffset(new Point(0, -10));
model.addAnnotation(arrow);
return model;
}