6.2.1 List interaction

If you select different items in the list, only the last item you select remains highlighted. The way in which the items in a list panel interact upon selection can be controlled with the :interaction keyword.

The list produced in the example above is known as a single-selection list because only one item at a time may be selected. List panels are :single-selection by default.

There are also multiple-selection and extended-selection lists available. The possible interactions for list panels are:

• :single-selection -- only one item may be selected
• :multiple-selection -- more than one item may be selected
• :extended-selection -- see Extended selection

To get a particular interaction, supply one of the values above to the :interaction keyword, like this:

(contain 

 (make-instance 

  'list-panel 

  :items '("Red" "Green" "Blue") 

  :interaction :multiple-selection)) 

Note that :no-selection is not a supported choice for list panels. To display a list of items with no selection possible you should use a display-pane .

CAPI User Guide (Macintosh version) - 30 Aug 2011