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[ 4 posts ] |
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2.0.13 pie chart not enough colours
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matthucke
New pChart user
Joined: Fri Jan 21, 2011 12:43 am Posts: 1
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2.0.13 pie chart not enough colours
I'm using the default colours for the slices in a pie chart; however, with more than 8 data points, it runs out of colours, issues warning messages to the screen, and renders subsequent slices in black.
The fix: when fetching colours into the palette, take the current data point id and modulo it by the palette size - the colours will thus cycle.
It needs changing in two places, lines 314 and 523. Diff appears below:
< : denotes lines in 2.0.13 > : denotes my version
314c314,315 < $Settings = array("R"=>$Palette[$ID]["R"],"G"=>$Palette[$ID]["G"],"B"=>$Palette[$ID]["B"],"Alpha"=>$Palette[$ID]["Alpha"]); --- > $colourid = $ID % count($Palette); > $Settings = array("R"=>$Palette[$colourid]["R"],"G"=>$Palette[$colourid]["G"],"B"=>$Palette[$colourid]["B"],"Alpha"=>$Palette[$colourid]["Alpha"]); 523c524,526 < { $Settings = array("R"=>$Palette[$ID]["R"]+30,"G"=>$Palette[$ID]["G"]+30,"B"=>$Palette[$ID]["B"]+30,"Alpha"=>$Palette[$ID]["Alpha"]); } --- > { > $colourid = $ID % count($Palette); > $Settings = array("R"=>$Palette[$colourid]["R"]+30,"G"=>$Palette[$colourid]["G"]+30,"B"=>$Palette[$colourid]["B"]+30,"Alpha"=>$Palette[$colourid]["Alpha"]); }
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Fri Jan 21, 2011 12:47 am |
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GeorgeB
New pChart user
Joined: Mon Jan 31, 2011 5:46 pm Posts: 2
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Re: 2.0.13 pie chart not enough colours
Hello, I've hit this as well (with 9 data points). The error message is: --- Notice: Undefined offset: 8 in /var/www/george/lib/pChart2.1.0/class/pPie.class.php on line 314 --- The patch above seems to have resolved the issue. Thanks, George.
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Mon Jan 31, 2011 6:16 pm |
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mice32
Experienced pChart user
Joined: Thu Dec 02, 2010 3:03 pm Posts: 36 Location: Somerville, MA, USA
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Re: 2.0.13 pie chart not enough colours
From pChart 1.27 FAQ, but it is still actual: Q: Series are drawn black? A: No, this is not a bug! Series are drawn as black because you do not have enough colors in your palette. Remember, basically pChart embed only colors for 8 series. If you have more than 8 series, you'll need to add colors to you palette. The setPalette() is here to help you!http://pchart.sourceforge.net/documentation.php?topic=faq.sblack
_________________
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Tue Feb 01, 2011 12:22 am |
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jean-damien
Site Admin
Joined: Thu Dec 02, 2010 2:31 pm Posts: 409 Location: France
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Re: 2.0.13 pie chart not enough colours
I believe that it would be good to add a test entry that will create random uggly colors ;o)
JD.
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Tue Feb 01, 2011 10:45 am |
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