Diable editing a cell for a grouped cell

Discontinued products Uncategorized discussions
#1

I am using treegrid. I have a cell with its type set to price[=sum]. I want to disable the editing of this cell. I also want to know how to display a blank in one of the parent grouping for the same cell. Currently it displays a $ if there is no value.

#2

I want to disable the editing of this cell.
You can disable edit operations for all math based cells by
    grid.enableMathEditing(false);
If you need to disable some specific cell only
    grid.cells(i,j).setDisabled(true);

>>it displays a $ if there is no value.
This is the default logic of price excell it can be adjusted only by code modification in dhtmlxgridcell.js ( eXcell_price.prototype.setValue )