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| Re: How to control the color of line chart? [message #369070 is a reply to message #369069] |
Mon, 27 July 2009 00:01  |
Eclipse User |
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Originally posted by: johnw.innoventsolutions.com
Sorry, I thought I posted a reply.
Yes, if you override the beforeDrawDataPoint, you can conditionally
color chart elements. You can do the same thing with lines as well.
Below is an example, taken from
http://marklorenz.blogspot.com/2006/02/birt-tips-for-java-de velopers.html,
but its for Bar Charts. The same idea should apply to line charts as well.
function beforeDrawDataPoint(
dataPointHints, fill, scriptContext ){
val = dataPointHints.getOrthogonalValue();
chart = scriptContext.getChartInstance();
marker =
chart.getAxes().get(0).getAssociatedAxes().get(0).getMarkerL ines().get(0).getValue().getValue();
if (val > marker) //crosses marker?
fill.set(255, 0, 0); //yes - display in red
else
fill.set(0, 0, 255); //no - display in blue
}
zhen yang wrote:
> Not sure if I described clearly, is anybody have any idea on this?
>
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