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Legend label for series when grouped by key [message #731005]

Thu, 29 September 2011 13:01

Eclipse User

I am having this datetime chart in which I have grouped the y axis data by ID column. Thus the chart automatically creates all the requisite series. Now ID column in the legend list doesn't go for great viewing. So I want to replace the ID with its corresponding name. But there seems no way to do it Sad

I even tried a data cube. In it one can specify a display field for key field. So for ID key field, I had display field of associated text and all was good until I realized that chart is not picking up date time group as date time but as text!! And I cannot change the text to datetime. So though the legend shows fine, since the x axis is now text in chart, it is not scaled properly for one.

I will appreciate your help.

Re: Legend label for series when grouped by key [message #731019 is a reply to message #731005]

Thu, 29 September 2011 13:37

Eclipse User

Is there anyway you can share a sample report with the issue that we can
run? For example create a scripted data source and hard code some
values and add your chart. If you can post the report.

Jason

On 9/29/2011 1:01 PM, pkj5ue wrote:
> I am having this datetime chart in which I have grouped the y axis data
> by ID column. Thus the chart automatically creates all the requisite
> series. Now ID column in the legend list doesn't go for great viewing.
> So I want to replace the ID with its corresponding name. But there seems
> no way to do it :(
> I even tried a data cube. In it one can specify a display field for key
> field. So for ID key field, I had display field of associated text and
> all was good until I realized that chart is not picking up date time
> group as date time but as text!! And I cannot change the text to
> datetime. So though the legend shows fine, since the x axis is now text
> in chart, it is not scaled properly for one.
>
> I will appreciate your help.

Re: Legend label for series when grouped by key [message #731042 is a reply to message #731019]

Thu, 29 September 2011 14:42

Eclipse User

Yeah, I will do that. But meanwhile, I was thinking if

function beforeDrawLegendItem( lerh, bounds, icsc )
{
lerh.getLabel().setCaption(dataSetRow["TAG"]);
}
would work by looking up in dataset. But apparently dataset is not valid in the context of function.

Re: Legend label for series when grouped by key [message #731055 is a reply to message #731042]

Thu, 29 September 2011 14:56

Eclipse User

No it is not, but if Tag is already part of the chart data I can show
you how to get it. If it is not you can always put it in a global
variable and get it from script. Tell me which is your scenario and I
will explain how to do it.

Jason

On 9/29/2011 2:42 PM, pkj5ue wrote:
> Yeah, I will do that. But meanwhile, I was thinking if
> function beforeDrawLegendItem( lerh, bounds, icsc )
> {
> lerh.getLabel().setCaption(dataSetRow["TAG"]);
> }
> would work by looking up in dataset. But apparently dataset is not valid
> in the context of function.

Re: Legend label for series when grouped by key [message #731169 is a reply to message #731055]

Fri, 30 September 2011 03:37

Eclipse User

I have attached the report with a scripted data source. Report has two chart instances, one using a data set and the other data cube made from data set.
In first example, I was unable to change the series label from id to a name from that dataSetRow.
In the second chart example, though series label can be changed by having a different display text for id column, the x series is taken as text. I cannot change it to time Sad

Attachment: TestClass.java
(Size: 77.81KB, Downloaded 513 times)
Attachment: testReport.rptdesign
(Size: 82.58KB, Downloaded 533 times)

Re: Legend label for series when grouped by key [message #731306 is a reply to message #731169]

Fri, 30 September 2011 11:10

Eclipse User

You can always uses a hidden table to load up a hashmap with key value
pairs and then use this map in the beforeDrawLegendItem to lookup the
new value. Have a look at the attached example. Notice the table is
hidden and I use an oncreate script on the table detail row to load up
the hm and then uses a beforeDrawLegendItem script to read it.

Jason

On 9/30/2011 3:37 AM, pkj5ue wrote:
> I have attached the report with a scripted data source. Report has two chart instances, one using a data set and the other data cube made from data set.
> In first example, I was unable to change the series label from id to a name from that dataSetRow.
> In the second chart example, though series label can be changed by having a different display text for id column, the x series is taken as text. I cannot change it to time :(

Attachment: getlegendvaluefromdifferentcolumn.zip
(Size: 8.69KB, Downloaded 461 times)

Re: Legend label for series when grouped by key [message #731372 is a reply to message #731306]

Fri, 30 September 2011 14:45

Eclipse User

Thanks Jason.
I worked on Sql Server Reporting Services a couple of years back. From what I see in birt it feels like a different world with enormous possibilities. Of course I can't overstate the nightmare SSRS had become for anything custom:)
I wish to gain more insight of scripting and function and variable scope and age. If you could suggest some sources.
Thanks again.

Re: Legend label for series when grouped by key [message #731395 is a reply to message #731372]

Fri, 30 September 2011 16:01

Eclipse User

Check

http://www.eclipse.org/birt/phoenix/deploy/reportScripting.php

There are a lot of materials on birt-exchange.org.
http://www.birt-exchange.org/org/devshare/designing-birt-reports/339-birt-advanced-report-and-chart-scripting-examples/

You also can check birtworld.blogspot.com. We have a lot scripting
articles posted there.
http://birtworld.blogspot.com/2010/02/birt-crosstab-scripting.html
http://birtworld.blogspot.com/2010/08/birt-charting-scripting-overview.html

We also have several chapters on scripting in the Integrating and
Extending BIRT 3rd edition:
http://www.amazon.com/Integrating-Extending-BIRT-Eclipse-ebook/dp/B005GVFKKS/ref=tmm_kin_title_0?ie=UTF8&m=AG56TWVU5XWC2&qid=1317323690&sr=8-2

Jason

On 9/30/2011 2:45 PM, pkj5ue wrote:
> Thanks Jason. I worked on Sql Server Reporting Services a couple of
> years back. From what I see in birt it feels like a different world with
> enormous possibilities. Of course I can't overstate the nightmare SSRS
> had become for anything custom:)
> I wish to gain more insight of scripting and function and variable scope
> and age. If you could suggest some sources.
> Thanks again.

Re: Legend label for series when grouped by key [message #798165 is a reply to message #731005]

Tue, 14 February 2012 05:34

Eclipse User

I did in my report next.

The put into Y series Grouping the expression: row["TB_GROUP_ID"]+"|"+row["GROUP_NAME"]

And I added the script for the chart:
function beforeDrawLegendItem( lerh, bounds, icsc )
{
S = lerh.getLabel().getCaption().getValue();
S = S.substr(S.indexOf("|")+1);
lerh.getLabel().getCaption().setValue(S);
}

All works wonderful.

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