9.5 Specifying tooltips for toolbar buttons

There are two ways to implement tooltips in an interface toolbar:

• Group the buttons in a toolbar-component and supply the :tooltips initarg. tooltips should be a list containing a string for each button in the component. For an example of this see

• Alternatively you can implement a tooltip for each toolbar-button exactly as for collections and so on as described in Tooltips for collections, elements and menu items. Supply help-key for the toolbar-button and help-callback for the interface, as follows:

(setf print-button

      (make-instance 'toolbar-button

                     :image :std-print

                     :text "Print Something"

                     :help-key 'foo))

(defun do-help (interface pane type help-key)

  (when (eq type :tooltip)

    (when (eq help-key 'foo)

      "Tooltip help")))

(display

 (make-instance

  'interface

  :toolbar-items

  (list print-button)

  :help-callback 'do-help))

CAPI User Guide and Reference Manual (Unix version) - 3 Aug 2017