I'm using grouping with summary footer.Here is my code.

grouping: true,
        groupingView : { groupField : ['id_name'],
                         groupColumnShow : [false],
                         groupText : ['<b>{0}</b>'],
                         groupOrder: ['asc'],
                         showSummaryOnHide: true,
                         groupSummary : [true],
                         groupCollapse: true,
                         groupDataSorted : true
                       },

Questions :

(1) Do we have an event for groupCollapse? I need to do expand only one group at a time. When I try to expand 2nd group , first group should collapse & only summary should display.

(2) When I expand first group, I need to add one row underneath the summary footer for the same group. So I can provide charts, all other informations inside that new row. Is that possible? or any way around?

Any help should be appriciated.

Thanks you all,

A