Changing stroke shape for different datasets

[evan]

Hi.

I've tried different ways to do this, but it just doesn't seem to be working for me. Here is what I've done:

Code: Select all

chart.getXYPlot().getRenderer().setStroke(new BasicStroke(0.0f, BasicStroke.CAP_ROUND, 
						   							  		      BasicStroke.JOIN_ROUND,
						   							  			  1.0f, new float[] {2.0f, 6.0f}, 0.0f));
		chart.getXYPlot().getRenderer().setBaseStroke(new BasicStroke(0.0f, BasicStroke.CAP_ROUND, 
				  		      BasicStroke.JOIN_ROUND,
				  			  1.0f, new float[] {2.0f, 6.0f}, 0.0f));
		chart.getXYPlot().getRenderer().setSeriesStroke(0, new BasicStroke(0.0f, BasicStroke.CAP_ROUND, 
				  		      BasicStroke.JOIN_ROUND,
				  			  1.0f, new float[] {2.0f, 6.0f}, 0.0f));

So basically, I end up with having this new Stroke everywhere (i.e. as stroke, baseStroke, first element of the strokeList) in the render, but when it draws, I still keep getting the standard square shape regardless.

Any ideas why this happens? Thanks.

[david.gilbert]

Only the setStroke(...) call in your code will have any effect, because it sets an override so that the other settings are ignored. Try changing the stroke width from 0.0f to 5.0f, just to see that the stroke is, in fact, being used.

I wonder if you will even see the CAP_ROUND effect with a very thin stroke?

[evan]

I've tried many different values of the parameters of the stroke, but I cannot see any changes (e.g. stroke shape, size, etc). Any other possibilities that could cause this problem?

[david.gilbert]

I've tried many different values of the parameters of the stroke, but I cannot see any changes (e.g. stroke shape, size, etc). Any other possibilities that could cause this problem?

Have you eliminated silly errors? For example, are you sure that the 'chart' you are modifying is the same one you are looking at in the output? If you post a small self-contained demo that reproduces the problem, then I'll have a much better chance of tracking it down.

[evan]

Here's some code I'm using:

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private FastXYPlot getFastPlot ()
	{
		// setting up x and y axes
		NumberAxis domainAxis = new NumberAxis("T");
        domainAxis.setAutoRange(true);
        domainAxis.setAutoRangeIncludesZero(true);
        NumberAxis rangeAxis = new NumberAxis(ResultData.getYAxisName(dataType));
        rangeAxis.setAutoRange(true);
        rangeAxis.setAutoRangeIncludesZero(true);
		
        XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(false, true);
        renderer.setStroke(new BasicStroke(5.0f, BasicStroke.CAP_ROUND, 
                        BasicStroke.JOIN_ROUND, 
                       1.0f, new float[] {2.0f, 6.0f}, 0.0f));
        
		FastXYPlot plot = new FastXYPlot(sets[0], domainAxis, rangeAxis, new XYLineAndShapeRenderer(false, true));

		return plot;
	}

I call this method to get the plot, and then create my chart:

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// create the chart
		plot = getFastPlot();
		JFreeChart chart = new JFreeChart(ResultData.getChartName(dataType), plot);

These are the relavant code, I think. It might be worth to point out that I'm using a modified plot. Many thanks.

[skunk]

Perhaps your FastXYPlot has some optimizations that assume that all datasets use the same rendering attributes in order to be "fast"?

[evan]

yea, that seems to be the problem. thanks skunk.