9.5 Controlling the interface title

You can add dynamic control of window titles using the functions illustrated in the section.

Firstly we add a counter to the title of new demo windows:

(defvar *demo-title-counter* 0)

(defmethod capi:interface-extend-title ((self demo) title)

  (format nil "~A - ~D"

          (call-next-method)

          (incf *demo-title-counter*)))

(capi:display (make-instance 'demo))

Then we specify common prefix for all interface window titles:

(capi:set-default-interface-prefix-suffix

 :prefix "My " :suffix nil )

(capi:display (make-instance 'demo))