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:

  (example-edit-file "capi/applications/simple-symbol-browser")
  

• Alternatively you can implement a tooltip for each toolbar-button exactly as for collections and so on as described in 3.12.2 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))