Function

Summary

The abort-dialog function aborts the current dialog.

Package

capi

Signature

abort-dialog &rest ignored-args

Description

This function is used to abort the current dialog. For example, it can be made a selection callback from a Cancel button so that pressing the button aborts the dialog. In a similar manner the complementary function exit-dialog can be used as a callback for an OK button.

If there is no current dialog then abort-dialog does nothing and returns nil . If there is a current dialog then abort-dialog either returns non-nil or does a non-local exit. Therefore code that depends on abort-dialog returning must be written carefully. Constructs like this can be useful:

(unless (capi:abort-dialog)

  (foo))

Above, foo will be called only if there is no current dialog.

It is not useful to do either:

(when (capi:abort-dialog)

  (foo))

or

(progn

  (capi:abort-dialog)

  (foo))

as in both cases it is not well-defined whether foo will be called if there is a current dialog.

Example

(capi:display-dialog

  (capi:make-container

    (make-instance 'capi:push-button

                   :text "Cancel"

                   :callback 'capi:abort-dialog)

                   :title "Test Dialog"))

Also see the examples in the directory examples/capi/dialogs/ .

See also

exit-dialog
display-dialog
popup-confirmer
interface