DefaultPolarItemRenderer setSeriesVisible

[PatrickN]

Hi Guys,

just a basic and very simple question: Does the DefaultPolarItemRenderer/PolarItemRenderer support the setSeriesVisible(index,boolean) method of AbstractRenderer? And if not, is it possible to realize that as a patch?

Looking forward to your answers:)

[paradoxoff]

A look in the source of DefaultPolarItemRenderer suggests that this renderer does not care about the series or item visibility. You probably have to extend DefaultPolarItemRenderer and overwrite both getItemVisible() to return a suitable boolean and the drawSeries-Methode to use this flag.

[PatrickN]

Thank you for your answer!

I thought about extendig the DefaultPolarItemRenderer but don't know how... Do you have an example or little code snippet of how to do that?

[paradoxoff]

I have never worked with the Polar-classes. A look ih the source suggests that the drawSeries-Method of DefaultPolarItemRenderer does the actual rendering.
if you want to hide an entire series, you could check for the visibility of the series at the beginning of this method:

Code: Select all

if(!isSeriesVisible(seriesIndex)) return;

To hide individual items, you would have to override getItemVisible(int, int)and wrap the block between line 511 and 520 in an if-block

Code: Select all

if(getItemVisible(seriesIndex, i)){
    double theta = dataset.getXValue(seriesIndex, i);
    double radius = dataset.getYValue(seriesIndex, i);
    ....
}

[PatrickN]

Seems to be simple...

So do I have to decompile the JFreeChart-Library to modify the source code? Or is there a better way?

(I never had to modify a library before....)

[PatrickN]

Seems to be simple...

So do I have to decompile the JFreeChart-Library to modify the source code? Or is there a better way?

(I never had to modify a library before....)

It wooooorks!! Thank you:)

Just added

Code: Select all

if(!isSeriesVisible(seriesIndex)) return;

to draw-method of DefaultPolarItemRenderer to make whole series visible/invisible.

To modify the library I created a new (eclipse) project based on the source-files of jfreechart.