For most of the charts, the columns in your DataTable determine the data
series. You can get the labels by reading the column labels out of the
DataTable:
// skip column 0 since that is typically the domain axis values and not a
data series
for (var i = 1; i < data.getNumberOfColumns(); i++) {
var label = daat.getColumnLabel(i);
// do something with label
}
You cannot get the color information from the chart, but you can reference
the default color array
<https://groups.google.com/d/msg/google-visualization-api/fmZzdKnmQC0/3KYsJ4N-IeMJ>,
which are assigned in series order, or you can supply your own colors for
the chart and use them when building the legend.
On Friday, August 29, 2014 2:29:51 AM UTC-4, Schabagh wrote:
>
> Hi Andrew,
>
> thanks. How can I make a connection between my own legend and the chart, so
> that I get the information that I need to build the legend?
>
> Thanks
>
>
> Am Freitag, 29. August 2014 00:29:01 UTC+2 schrieb Andrew Gallant:
>>
>> You cannot group your legend items, sorry. You can, however, turn off
>> the legend in the chart and build your own legend in HTML that uses
>> whatever layout you want.
>>
>> On Thursday, August 28, 2014 9:06:30 AM UTC-4, Schabagh wrote:
>>>
>>> Hello,
>>>
>>> is that possible to group the legends? my legend looks at the moment
>>> like follows:
>>>
>>> |curve 1 |Curve 2 |Curve 3 |Curve 4 |Curve 5 |Curve 6 |Curve 7 |Curve 8
>>>
>>> I would like to have this as follows with a border around each group :
>>>
>>>
>>> ---------------------------------------------------------------
>>> Group1 ---> | Device 1: = Curve 1 = Curve 2 = Curve 3 |
>>> ====================================
>>> Group2 ---> | Device 2: = Curve 4 = Curve 5 = Curve 6 |
>>>
>>> ---------------------------------------------------------------
>>>
>>> Thanks
>>>
>>
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