Problem with dashed/dotted lines

[Mottfried]

Hi there !

I have an XYPlot on which i want some dotted and some dashed lines.

As basic example i used http://www.jfree.org/phpBB2/viewtopic.p ... yle+dotted
The point in this example is :

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float lineWidth = 0.2f;
float dash[] = {5.0f};
float dot[] = {lineWidth};
   
            if (style.equalsIgnoreCase(STYLE_LINE)) {
                result = new BasicStroke(lineWidth);
            } else if (style.equalsIgnoreCase(STYLE_DASH)) {
                result = new BasicStroke(lineWidth, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 10.0f, dash, 0.0f);
            } else if (style.equalsIgnoreCase(STYLE_DOT)) {
                result = new BasicStroke(lineWidth, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, 2.0f, dot, 0.0f);
            } 

my implementation uses :

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float miterlimit = 1.0f;
float dash[] = {10.0f};
float dot[] = {1.0f};
float dash_phase = 0.0f;
render.setSeriesStroke(ls.series, new BasicStroke(8, BasicStroke.CAP_BUTT, BasicStroke.JOIN_MITER, miterlimit, dash, dash_phase));

But i've tried to dash the lines with all parameters as explained here http://www.oreilly.com/catalog/java2d/c ... html#39742 and the lines wont be dashed or dotted or something else. Its just a plain line.

Anybody an idea ?
Thank you !

[Mottfried]

No help ?

[david.gilbert]

If you have a lot of data points, then the following might help:

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renderer.setDrawSeriesLineAsPath(true);

This assumes you are using XYLineAndShapeRenderer.

If it is not that, then check that 'render' in your code really does reference the renderer being used by your chart (perhaps it is a renderer that you created but never assigned to the chart).

[Mottfried]

Thank you.

The mistake was that I used the XYItemRenderer Now everything is fine.

[Mottfried]

Found something else

I can dash or dot my lines - wonderful. But if i add a second axis, and to that second axis a dataset with some series - the stroke-style, line-colour, line-thickness are always the same like the corresponding index of the first dataset.

As example 2 axis, 2 datasets, 2 styles and the same index :

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c.graph[0].setLineStyle(0, 1.5f, Color.black, LineStyle.LINE_DOTTED);
c.graph[1].setLineStyle(0, 1.2f, Color.blue, LineStyle.LINE_NORMAL);

The line-style of axis 0 is overwritten by the line-style of axis 1.
Those classes only wrap the specialties of jFreeChart, so it might be an jFreeChart-problem. If u need i can email the whole code - but i think thats not necessary.

As ever - thanks for the competent help !

[suwandy]

Hi,

sorry for using this thread. But I thought I should try to keep my posts relevant to the topic. Here goes anyway.
I'm using a LineAndShapeRenderer class to draw my line. here is the code I'm using

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        float dash[] = {5.0f}; 
        renderer2.setSeriesStroke(
            0, new BasicStroke(2.0f, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND, 1.0f, dash, 1.0f
            )
        );

But somehow it wouldn't show any dashed line. I have made sure I set the renderer to be drawn. I only have 2 points in the line. Is that a problem? If not, what is the actual problem?

[mickish]

If you have a lot of data points, then the following might help:

Code: Select all

renderer.setDrawSeriesLineAsPath(true);

Thanks! That was exactly what I needed.