Chart lineSeries renderer

[brunweb]

Hi I would like to create a pareto chart :
I use a store with 3 fields:

 private static Store BuildStore(this BiziPharmaDAL.TableauPareto TP)
        {
            Store store = new Store
            {
                ID = "tsgPare" + idcounter,
                Model = 
            { 
                new Model 
                {
                    Fields = 
                    {
                        new ModelField("libelle", ModelFieldType.String),
                        new ModelField("cumul", ModelFieldType.Int),
                        new ModelField("qte", ModelFieldType.Int),
               
                    }
                }
            }
            };

            store.DataSource = TP.lignes;

            return store;
        }

"cumul" field is the running total.
I do not wish to populate it on server side, so i decided to add a renderer to the line series:

ColumnSeries colqte = new ColumnSeries();
colqte.XField = new string[] { "libelle" };
colqte.YField = new string[] { "qte" };
LineSeries colcum = new LineSeries();
colcum.XField = new string[] { "libelle" };
colcum.YField = new string[] { "cumul" };
colcum.Renderer.Handler = @"record.data.cumul= (index > 0 ? (store.getAt(index - 1).data.cumul) : 0) + record.data.qte; return record.data.cumul;";

it does not render as i expect it to:


as well, firebug tells me "TypeError: record.data is undefined"

I tried replacing record.data.qte by store.getAt(index).data.qte : this time firebug tells me storeGetAt is undefined, and so on...

can you please tell me what i am doing wrong ?

As well, i use the same store to build a gridpanel (see on scrennshot) : in this panl, column "cumul" is also renderered:

 Renderer= { Handler=@" record.data.cumul= (rowIndex > 0 ? (store.getAt(rowIndex - 1).data.cumul) : 0) + record.data['qte']; return record.data.cumul;"}

and this works...

thanks for your help !

[Vladimir]

Can you provide runable sample?
It seems renderer works fine in the following sample
https://examples2.ext.net/#/Chart/Bar/Renderer/

Please note that it is required to return attributes (not value)

[brunweb]

Hi, thanks for your answer, i did not understand it was required to return attributes, i thought it could return values too.
Is there any way i can set the values of a series on the fly, or must i populate the store ?
as well, we also could imagine "stacked" values for line series : it would do the same, but appearently, it is not possbile.
thanks