| modify chart color by dataset value [message #177166] |
Thu, 13 July 2006 03:48  |
Eclipse User |
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Originally posted by: thomas.buffagni.otconsulting.com
Hi All!
I'm trying to modify at runtime the bar's color of chart conditionally.
I've tryed this code:
function beforeDrawDataPoint( dataPointHints, fill, context ){
val = dataPointHints.getOrthogonalValue();
chart = context.getChartInstance();
marker = 0;
if (val > marker) //crosses marker?
fill.set(0, 255, 0); //yes - display in red
else
fill.set(0, 0, 255); //no - display in blue*/
}
and it works but now i want change the color by the value of row field
that it isn't the value of the serie
I would like make somethings like this: marker = row["myMarker"], have you
some ideas?
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| Re: modify chart color by dataset value [message #177213 is a reply to message #177166] |
Thu, 13 July 2006 08:23  |
| Eclipse User |
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This is currently not supported. You can try to create an invisible series
linked to "myMarker", then access the value of that series by getting the
chart instance from the context:
context.getChartInstance().getAxes().get(0).getAssociatedAxe s().get(0).getRuntimeSeries().get(1).getDataSet().getValues( );
This will return an array of the values for the second series on the first Y
Axis (assuming this is the invisible one), then you can look up the value
for the index you're at in the beforeDrawDataPoint function. (the
dataPointHints should have the current index).
Thanks,
David
"Thomas" <thomas.buffagni@otconsulting.com> wrote in message
news:e7e2d5e1d1cad416277649e9980de5da$1@www.eclipse.org...
> Hi All!
> I'm trying to modify at runtime the bar's color of chart conditionally.
> I've tryed this code:
> function beforeDrawDataPoint( dataPointHints, fill, context ){
> val = dataPointHints.getOrthogonalValue();
> chart = context.getChartInstance();
> marker = 0;
> if (val > marker) //crosses marker?
> fill.set(0, 255, 0); //yes - display in red
> else
> fill.set(0, 0, 255); //no - display in blue*/
> }
>
> and it works but now i want change the color by the value of row field
> that it isn't the value of the serie
>
> I would like make somethings like this: marker = row["myMarker"], have you
> some ideas?
>
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| Re: modify chart color by dataset value [message #177259 is a reply to message #177229] |
Thu, 13 July 2006 09:32 |
| Eclipse User |
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Originally posted by: thomas.buffagni.otconsulting.com
This is the right code, now it works
function beforeDrawDataPoint( dataPointHints, fill, context ){
val = dataPointHints.getOrthogonalValue();
index = dataPointHints.getIndex();
seriesArray =
context.getChartInstance().getAxes().get(0).getAssociatedAxe s().get(0).getRuntimeSeries();
markerValue = seriesArray[0].getDataSet().getValues()[index];
if (markerValue < val) //crosses marker?
fill.set(255, 0, 0); //yes - display in red
else
fill.set(0, 0, 255); //no - display in blue
}
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