onXScaleDblClick

fires when the user makes a double click on a cell on the x-axis (the Timeline view only)

void onXScaleDblClick(number index,object value,Event e);

index	number	the column index of the clicked cell (zero-based numbering)
value	object	a Date object of the start time stamp of the clicked cell
e	Event	a native event object

scheduler.attachEvent("onXScaleDblClick", function (index, value, e){
    //any custom logic here
});