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  DataColor
Posted by Adrian Groves on Sep-05-2011 23:56
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Hi there,

I am drawing a pie chart using the standard chartdirector colours, which can be referenced
by the constant DataColor + pie sector number. I want to show these colours with some
transparency too. How do I get the actual ARGB value for each DataColor pie sector so I
can alter it and add some transparency ?

thanks,

Ade

  Re: DataColor
Posted by Kiran Sattikar on Sep-13-2011 19:29
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Adrian Groves wrote:

Hi there,

I am drawing a pie chart using the standard chartdirector colours, which can be referenced
by the constant DataColor + pie sector number. I want to show these colours with some
transparency too. How do I get the actual ARGB value for each DataColor pie sector so I
can alter it and add some transparency ?

thanks,

Ade
Hi Ade,

1) You can use setSectorStyle(Chart.LocalGradientShading); method of piechart object.
2) You can get ARGB pie colors using any web devlopment tool like colorpicker/G-chrome/Firebug of mozilla. Use setColor method of piechart sector.

Regards,
Kiran Sattikar

  Re: DataColor
Posted by Peter Kwan on Sep-14-2011 01:47
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Hi Adrian,

Sorry for the late reply.

You can always set any sector color to semi-transparent by using Sector.setColor or BaseChart.setDataColor. You just need to use a semi-transparent color like 0x80ff3333. (The color should have 8 digits, with the first two digits representing the transparent level. A value of 80 means half transparent.)

If you would like to get the automatic colors used in ChartDirector, and convert them into semi-transparent colors, the code is like:

for ($i = 0; $i < $noOfSectors; ++$i) {
   $myColor = $c->getDrawArea()->getARGBColor(DataColor + $i);
   $c->setColor2(DataColor + $i, array(0x80000000 + $myColor));
}

Hope this can help.

Regards
Peter Kwan