i need to update a update a single cell after i drag drop an event. else i should be able to trigger 'onBeforeCellRender' event pragmatically from other function
By default, cell properties customized using onBeforeCellRender are cached until a full update().
1. If your cell content depends on the overlapping events you can simply turn the caching off:
dp.beforeCellRenderCaching = false;
This approach is used in the "Resource Utilization" demo because it requires that the cells are updated after every drag and drop change:
2. Another option is to keep the caching on and invalidate a specific cell:
If you invalidate the cell before the event is actually moved (i.e. in onEventMove, not in onEventMoved) the cell will be updated automatically.