onChanged()

int fl::UIButton::onChanged ( function< void(UIButton &)> callback )

inline

Definition at line 78 of file button.h.

                                                                   {
        int id = mCallbacks.add(callback);
        mListener.addToEngineEventsOnce();
        return id;
    }

References FL_NOEXCEPT, mCallbacks, and mListener.