Grid allows changing the cell display and behavior using various cell templates. Possible cell types include text, image, image+text, checkbox, combo etc. To change the cell type assign a new cell template to the individual cell or the whole column.
obj.setCellTemplate(new AW.Templates.Checkbox, 1); // column-1 as checkbox
obj.setCellTemplate(new AW.Templates.Combo, 1, 1); // cell-1-1 as combo box