extjs - Extjs4: Customize dropdown menu in grid column header -


I want to customize the dropdown of each column header in a grid panel. Each column must contain a filter (example:

Grade (dropdown menu shows the checkbox with K, 1,2,4 as a filter) K 1 2 K 4 < P> I have found this solution to manipulate the loopdown menu, but the problem is that it changes all the dropdowns and not every one.

I have any suggestions

Thank you

I finally "grid filter feature ux" I use it, some more road setup by ACC.

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