Agfdhyk

I need to record the list of rows that expanded in a Gantt chart in a SAPUI5 program.

I found this handleExpandChartChange event but there is no attach function for this. Does anyone have any idea that how do we have to use it or any other method to know about the extended rows?

I solved my problem. We have to use treeTableToggleEvent event to monitor the expanded or collapsed rows.

For this we can use the following function as a event handler for treeTableToggleEvent:

onTreeTableToggleEvent: function (oEvent) {

    var oParameters = oEvent.getParameters();

    if (oParameters.rowIndex >= 0 && oParameters.expanded) {

        if (!this._aExpandedRows.includes(oParameters.rowIndex)) {

            this._aExpandedRows.push(oParameters.rowIndex);

        }

    } else if (oParameters.rowIndex >= 0 && !oParameters.expanded) {

        var iIndex = this._aExpandedRows.indexOf(oParameters.rowIndex);

        if (iIndex > -1) {

            this._aExpandedRows.splice(iIndex, 1);

        }

    }

},

For using this function we need the _aExpandedRows array to initiate to empty array when we initiate the Gantt chart.

this._aExpandedRows = ;

The expanded row indices are stored in _aExpandedRows array.

I solved the monitoring problem of the expansion of nodes. But still I am interested in how to use handleExpandChartChange event.