It looks like the handling of the colouring between lines is implemented in drawFirstPassShape
The line colour appears to be based on the preceding point
This modification to your XYLineAndShapeRenderer
uses a gradient fill to blend the line colour.
XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(){
@Override
public Paint getItemPaint(int row, int col) {
Paint cpaint = getItemColor(row, col);
if (cpaint == null) {
cpaint = super.getItemPaint(row, col);
}
return cpaint;
}
public Color getItemColor(int row, int col) {
System.out.println(col + "," + dataset.getY(row, col));
double y = dataset.getYValue(row, col);
if(y<=3) return Color.black;
if(y<=4) return Color.green;;
if(y<=5) return Color.red;;
if(y<=6) return Color.yellow;;
if(y<=10) return Color.orange;;
return null;
}
@Override
protected void drawFirstPassShape(Graphics2D g2, int pass, int series,
int item, Shape shape) {
g2.setStroke(getItemStroke(series, item));
Color c1 = getItemColor(series, item);
Color c2 = getItemColor(series, item - 1);
GradientPaint linePaint = new GradientPaint(0, 0, c1, 0, 300, c2);
g2.setPaint(linePaint);
g2.draw(shape);
}
};
I've removed ColorUtil.hex2Rgb
as I don't have access to that class/method. You may want to modify GradientPaint
to take account of the distance/gradient between points.
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