gridLayout issue

  a!gridLayout(
                      labelPosition: "ABOVE",

                      headerCells: {
                        a!gridLayoutHeaderCell(label: "Reference Number"),
                        a!gridLayoutHeaderCell(label: "SiteID"),
                         
                        a!gridLayoutHeaderCell(label: "Activity"), 
                        a!gridLayoutHeaderCell(label: "Structure Type"), 
                        

                        a!flatten(a!forEach(
                          items: local!TaskParagraphCDT.TaskName,
                          expression:   
                          {
                            /*a!gridLayoutHeaderCell(label: fv!item & " Status"),*/
                            a!gridLayoutHeaderCell(label: fv!item),
                           
                          } 
                        )),
                        a!gridLayoutHeaderCell(label: "Rule"),
                      },
                      columnConfigs: {                            
                        /*a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),*/
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                        a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1),
                      

                        a!forEach(
                          items: local!taskIds,
                          expression: {
                            a!gridLayoutColumnConfig(width: "DISTRIBUTE", weight: 1)
                          }
                          /*a!gridLayoutHeaderCell(label: fv!item & " End Date")*/


                        )
                      },
                      rows: 
                      a!forEach(
                        items: local!selectedActivity,
                        expression: with(
                          local!item:fv!item,
                          a!gridRowLayout(
                            contents: {
                              a!textField(
                                value: fv!item.referenceNumber,
                                saveInto: fv!item.referenceNumber,
                                readOnly: true
                              ),
                              a!textField(
                                value: fv!item.siteID ,
                                saveInto:fv!item.siteID,
                                readOnly: true
                              ),
                             
                              a!textField(
                                value: fv!item.activityName,
                                saveInto:fv!item.activityName,
                                readOnly: true
                              ),
                              a!textField(
                                value: fv!item.structureType,
                                saveInto:fv!item.structureType,
                                readOnly: true
                              ),

                              { 
                                a!forEach( 
                                  items: local!TaskParagraphCDT.TaskID,
                                  expression:{
                                    /*a!textField(                                         */
                                      /*value:local!TaskParagraphCDT[fv!index].Status[wherecontains(tostring(local!item.referenceNumber),touniformstring(ri!ForecastDataValue.referenceNumber))],*/
                                      /*readOnly: true*/
                                    /*),*/
                                    a!textField(
                                      value: local!TaskParagraphCDT[fv!index].EndDate[wherecontains(tostring(local!item.referenceNumber),touniformstring(local!selectedActivity.referenceNumber))],
                                      readOnly: true,                                
                                    ),
                                    /*a!dateField(*/
                                      /*value:  */
                                      /*local!TaskParagraphCDT[fv!index].EndDate[wherecontains(tostring(local!item.referenceNumber),touniformstring(local!selectedActivity.referenceNumber))],*/
                                      /*readOnly: true,*/
                                    /*)*/
                                  }
                                )
                              },
                              a!textField(
                                value:{},
                                saveInto:{},
                                readOnly: true
                              ),

                            }
                          ) 

                        )
                      ),

                      height:"TALL",
                      spacing: "STANDARD",
                      rowHeader: 1
                    )

Hi All above is my code in which i am getting correct data for each task at one row.

but now i have requiremnt where i have to make fvItem 's one task field editable , the current grid design showing in the below image.

so my requirement is like that one task of fv!item's which is PM go design will be editable and the if db have value for this task will be show otherwise user will select date and then on behalf of this date the next task value will be visible eg. If PM GO DESIGN task enddate today then material required date will be +15 days and then next will material required date +21 days etc....

so could anyone help me on this i am not getting any idea.