public JPanel createDemo() {
model = new DefaultChartModel();
demoPanel = new JPanel();
Axis xAxis = new CategoryAxis<Country>(countries);
xAxis.setLabel("Countries");
Axis yAxis = new Axis(new NumericRange(0, 25));
yAxis.setLabel("Numbers");
chart = new Chart();
chart.setXAxis(xAxis);
chart.setYAxis(yAxis);
Font titleFont = UIManager.getFont("Label.font").deriveFont(Font.BOLD, 14f);
chart.setTitle(
new AutoPositionedLabel("Chart with Categorical X Values", Color.blue, titleFont));
chart.setVerticalGridLinesVisible(false);
chart.setShadowVisible(true);
model
.addPoint(usa, 22)
.addPoint(uk, 18)
.addPoint(france, 13.5)
.addPoint(germany, 12)
.addPoint(russia, 8)
.addPoint(china, 7);
Color green = new Color(0, 170, 0);
ChartStyle style = new ChartStyle(green, true, true);
style.setLineWidth(6);
style.setPointSize(20);
chart.addModel(model, style).setPointRenderer(new SphericalPointRenderer());
ChartStyle redHighlightStyle =
new ChartStyle(new Color(200, 0, 0), PointShape.DISC, 20).withPointsAndLines();
redHighlightStyle.setLineWidth(6);
redHighlightStyle.setLineColor(green);
chart.setHighlightStyle(redHighlight, redHighlightStyle);
demoPanel.setLayout(new BorderLayout());
demoPanel.add(chart, BorderLayout.CENTER);
chart.addMouseMotionListener(
new MouseMotionListener() {
// Allow the user to drag _points in the vertical direction
public void mouseDragged(MouseEvent e) {
rollover(e);
if (highlighted != null) {
Point p = e.getPoint();
Point2D userPoint = chart.calculateUserPoint(p);
if (userPoint != null) {
highlighted.setY(new RealPosition(userPoint.getY()));
}
chart.repaint();
}
}
// Add a rollover effect
public void mouseMoved(MouseEvent e) {
rollover(e);
}
private void rollover(MouseEvent e) {
Point p = e.getPoint();
PointSelection selection = chart.nearestPoint(p, model);
if (highlighted != null) {
highlighted.setHighlight(null);
}
Chartable selected = selection.getSelected();
Point2D selectedCoords =
new Point2D.Double(selected.getX().position(), selected.getY().position());
Point dp = chart.calculatePixelPoint(selectedCoords);
// Only activate the rollover effect when within 50 pixels of a point
if (p.distance(dp) < 50) {
highlighted = (ChartPoint) selection.getSelected();
highlighted.setHighlight(redHighlight);
ChartCategory<?> x = (ChartCategory<?>) selected.getX();
chart.setToolTipText(
String.format("%s : %.1f", x.getName(), selected.getY().position()));
} else {
chart.setToolTipText(null);
}
chart.repaint();
}
});
chart.addMouseListener(
new MouseAdapter() {
@Override
public void mouseExited(MouseEvent e) {
if (highlighted != null) {
highlighted.setHighlight(null);
chart.repaint();
}
}
});
demoPanel.setPreferredSize(new Dimension(500, 500));
return demoPanel;
}
