NSPredicateEditorRowTemplate with a custom view, predicateWithSubpredicates not being called

In my app I need to be able to filter items by colours.

I've subclassed the NSPredicateEditorRowTemplate and added custom view :

*Custom view is NSView with 7 NSButtons

My problem is that predicateWithSubpredicates: gets called only when I add/remove some rows in NSPredicateEditor.

But I want it to be called every time I choose color (clicking corresponding NSButton)

The only way I see is to copy target and action of NSTextField in templateViews. Are there any other ways ?

Thanks in advance