Generic Function

Summary

The function called to display an interface on screen.

Package

capi

Signature

interface-display interface

Arguments

interface

An instance of a subclass of interface.

Description

The generic function interface-display is called by display to display an interface on screen.

The primary method for interface actually does the work. You can add :before methods on your own interface classes for code that needs to be executed just before the interface appears, and :after methods for code that needs to be executed just after the interface appears.

Notes

1. interface-display is called in the process of interface .
2. interface-display is not called when interface is displayed as a dialog. Another way to run code before it appears on screen is to supply a create-callback for interface .

Example

This example shows how interface-display can be used to set the initial selection in a choice whose items are computed at display-time:

(capi:define-interface my-tree ()

  ((favorite-color :initform :blue))

  (:panes

   (tree

    capi:tree-view

    :roots '(:red :blue :green)

    :print-function

    'string-capitalize))

  (:default-initargs 

   :width 200 

   :height 200))

(defmethod capi:interface-display :after 

  ((self my-tree))

  (with-slots (tree favorite-color) self

    (setf (capi:choice-selected-item tree)

          favorite-color)))

(capi:display (make-instance 'my-tree))

See also

display
interface