Filter grid

i’m added numeric filter in header (grid.attachHeader("#numeric_filter)). But i need to added own filtering, because negative numbers be enclosed enclosed in parenthesis ‘(’ and ‘)’ and minus sign not be shown. How i can do this filter?

It may have sense to create a custom exCell type to exclude parenthesis from the value and use a default numeric_filter.
Here is the tutorial about creating a custom exCell: … le_excells
Here is the working example: … ormat.html