Label of legend entries

Hi,

I got some problems settings the labels in legend for a multi-line-chart.

I got multiple y-series with additional title information applied. When I use no grouping everything works fine and these titles are displayed...but when I add some additional grouping, only the grouping value is displayed. Is it possible to add the series title the legend entries. I tried to modify the values via script but I don't have information about the current series there...So, is there any chance to do this? I could imagine the following output in the legend.
X <series-identifier1> - <groupvalue1>

Or is it possible to add 2 legends. One for the symbols or different line styles to explain/identify the different y-series and one for the coloring to explain the groupings?

Thanks,

Ingo

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Comments

JasonW

Ingo,

Color by categories. This should do what you want. See attached report.

Jason

Ingo

Hi,

thanks for the quick answer, but unfortunately this doesn't solve my problem. In your example you have only one column for the values. In my case I got multiple which leads to multiple series...

For example, I got values from different places for specific items

Item; Time; value1; value2
A;500ms; null; 8
A; 700ms; 5;null
B; 750ms; 20; null
...

X-Axis -> Time
Grouping on Item
2 Series: 1. value1, 2. value2

Now, the legend should display:
<Symbol for series1> <Label for series 1 > <Item>
<Symbol for series2> <Label for series 2 > <Item>

Thanks,

Ingo

JasonW

Ingo,

I am not certain this can be done.
You could have the legend show up like

symbol for item a label for a
symbol for item b label for b
_________Separator
symbol for item a label for a
symbol for item b label for b

Where the separator shows up once and above is series one and below is series two.

Jason

Ingo

Hi,

thats exactly what I got right now...but because if up to 6 series its hard to "remember" what one series represents...Is it possible to change the appearance of the separator so I could display a text for the series? ;-)

or is it possible to add another legend for the series?

Thanks,
Ingo

JasonW

Ingo,

This is a tough one. I suggest you log a bugzilla entry for this. You may also be able to add some script like

var series_number = 0;
function beforeDrawLegendItem(lerh, bounds, icsc)
{

if( lerh.getDataIndex() == 0 ){
series_number +=1 ;
}
var old_label =lerh.getLabel().getCaption().getValue();
lerh.getLabel().getCaption().setValue(old_label + " -- Ser" + series_number);
}

Jason

Ingo

Hi Jason,

nice idea. ;-)

I will try that...can I access the title of the corresponding series from there? Or do I need another "lookup-array" for this issue? How could that be automated?

Thanks,
Ingo

JasonW

Ingo,

Try something like:
importPackage(Packages.java.util);
importPackage(Packages.org.eclipse.birt.chart.model.data.impl);
importPackage(Packages.org.eclipse.birt.chart.model.component.impl);
importPackage(Packages.org.eclipse.birt.chart.model.type.impl);
var cm = icsc.getChartInstance();

var xAxis = cm.getAxes().get(0);
var yAxis = xAxis.getAssociatedAxes().get(0);

var yser1 = yAxis.getSeriesDefinitions().get(0).getDesignTimeSeries().getSeriesIdentifier();
var yser2 = yAxis.getSeriesDefinitions().get(1).getDesignTimeSeries().getSeriesIdentifier();
if( lerh.getDataIndex() == 0 ){
series_number +=1 ;
}
var old_label =lerh.getLabel().getCaption().getValue();
if( series_number == 1 ){
lerh.getLabel().getCaption().setValue(old_label + yser1);
}else{
lerh.getLabel().getCaption().setValue(old_label + yser2);
}
}

Ingo

Okay,

thanks. I'll try that as a workaround.

Ingo

Ingo

Hi,

since I haven't done scripting till now. Do I any more prerequisites to run this script? Do I need to copy more libraries or something like that to the tomcat?

As soon as I run the following method in the script I get a null-pointer-exception.

importPackage(Packages.java.util);
importPackage(Packages.org.eclipse.birt.chart.model.data.impl);
importPackage(Packages.org.eclipse.birt.chart.model.component.impl);
importPackage(Packages.org.eclipse.birt.chart.model.type.impl);

function beforeDrawLegendItem(lerh, bounds, icsc)
{

var cm = icsc.getChartInstance();
}

-->
null ( 1 time(s) )
detail : org.eclipse.birt.chart.exception.ChartException
at org.eclipse.birt.chart.reportitem.ChartReportItemPresentationImpl.onRowSets(ChartReportItemPresentationImpl.java:607)
at org.eclipse.birt.report.engine.presentation.LocalizedContentVisitor.processExtendedContent(LocalizedContentVisitor.java:772)
at org.eclipse.birt.report.engine.presentation.LocalizedContentVisitor.visitForeign(LocalizedContentVisitor.java:414)
at org.eclipse.birt.report.engine.content.impl.ForeignContent.accept(ForeignContent.java:59)
...
Caused by: java.lang.NullPointerException
at org.eclipse.birt.chart.script.ScriptHandler.convertException(ScriptHandler.java:1128)
at org.eclipse.birt.chart.script.ScriptHandler.register(ScriptHandler.java:1085)
at org.eclipse.birt.chart.reportitem.ChartReportItemPresentationImpl.onRowSets(ChartReportItemPresentationImpl.java:465)
... 99 more

Thanks,
Ingo

Ingo

Okay,

it runs now. I don't know why but I created the same chart again and now it works, in generally. The problem I got now is, that in another chart, I got multiple y-Axis. I tried the following but unfortunately got always the same label...

mportPackage(Packages.java.util);
importPackage(Packages.org.eclipse.birt.chart.model.data.impl);
importPackage(Packages.org.eclipse.birt.chart.model.component.impl);
importPackage(Packages.org.eclipse.birt.chart.model.type.impl);

var cm = icsc.getChartInstance();
var xAxis = cm.getAxes().get(0);
var yAxis = xAxis.getAssociatedAxes().get(0);
var yAxis1 = xAxis.getAssociatedAxes().get(1);
var yAxis2 = xAxis.getAssociatedAxes().get(2);

var yser1 = yAxis.getSeriesDefinitions().get(0).getDesignTimeSeries().getSeriesIdentifier();
var yser2 = yAxis1.getSeriesDefinitions().get(0).getDesignTimeSeries().getSeriesIdentifier();
var yser3 = yAxis2.getSeriesDefinitions().get(0).getDesignTimeSeries().getSeriesIdentifier();

if( lerh.getDataIndex() == 0 ){
series_number +=1 ;
}
var old_label =lerh.getLabel().getCaption().getValue();

switch ( series_number ) {
case 1: lerh.getLabel().getCaption().setValue(yser1 + " - " + old_label); break;
case 2: lerh.getLabel().getCaption().setValue(yser2 + " - " + old_label); break;
case 3: lerh.getLabel().getCaption().setValue(yser3 + " - " + old_label); break;
default:
}
}

Any suggestion? Thanks.

Ingo

JasonW

What line of the script got the same label?

Jason

Ingo

Okay got it.

It was just a typo.

Thanks for your help. ;-)

/Ingo