Attribute controller for each item quantity

[kkdoxy]

Hi friends,

I needed to know, how do the following steps in backoffice for:

After I add a button type radius controller attribute to do for this button a envennt for when i click event associated ..
so, I want when Iclicking in a "button number" (1,2,3,4 .. with arrow) it creates the item number automatically.


How do I do this for backoffice? thank you

[kkdoxy]

Example for my question...

I need to do:


And a work example with input text is:


So i need create a first example with the same as the second example was made.

Please help me