prompt-for-value message &key package initial-value value-function pane-args popup-args continuation
The function prompt-for-value prompts the user for a form and returns the result of evaluating that form.
The form is read in the
package
if specified or
*package*
if not and the result is the evaluation of the form.
If initial-value is supplied it provides a default form.
If value-function is supplied it overrides the default value function which reads the form and evaluates it.
If
continuation
is non-
nil
, then it must be a function with a lambda list that accepts two arguments. The
continuation
function is called with the values that would normally be returned by
prompt-for-value
. On Cocoa, passing
continuation
causes the dialog to be made as a window-modal sheet and
prompt-for-value
returns immediately, leaving the dialog on the screen. The with-dialog-results macro provides a convenient way to create a
continuation
function.
The prompter is created by passing a text-input-pane to popup-confirmer. Arguments can be passed to the
make-instance
of the pane and the call to
popup-confirmer using
pane-args
and
popup-args
respectively.
(capi:prompt-for-value
"Square"
:initial-value '(+ 1 2 3)
:value-function
#'(lambda (text)
(let ((res (eval (read-from-string text))))
(* res res))))