Here is a short example:
#lang racket
(require racket/promise
web-server/http/request-structs
web-server/formlets
net/url)
(define some-formlet
(formlet
(div "Checked Radio"
,{(default #"default" (radio #"checked-radio" #t)) . => . cr}
"Not-Checked Radio"
,{(default #"default" (radio #"unchecked-radio" #f)) . => . ncr}
"Checked Checkbox"
,{(default #"default" (checkbox #"checked-checkbox" #t)) . => . cc}
"Not-Checked Checkbox"
,{(default #"default" (checkbox #"uncheck-checkbox" #f)) . => . ncc})
(list cr ncr cc ncc)))
(formlet-display some-formlet)
(define (show-example bs)
(formlet-process some-formlet
(request #"GET"
(string->url "http://localhost";)
empty
(delay bs)
#f
"host"
8943
"client")))
(show-example empty)
(show-example (list (binding:form #"input_0" #"true")))
(show-example (list (binding:form #"input_0" #"true")
(binding:form #"input_1" #"false")))
(show-example (list (binding:form #"input_0" #"true")
(binding:form #"input_1" #"false")
(binding:form #"input_2" #"true")
(binding:form #"input_3" #"false")))
It would be good to create a higher-level formlet that rendered to a
checkbox or radio button that would return a boolean or a selection,
like the select formlets do.
Jay
On Mon, Dec 26, 2011 at 12:02 PM, keyd...@gmx.de <keyd...@gmx.de> wrote:
> Hi,
>
> it's me again, and whereas I don't know how dumb I am I sure might have been
> a bit lazy :-;
>
> Unfortunately, even after taking a bit more time, I don't know how it works.
> Lastly, I've been trying this, which displayed fine:
>
> (define f-choose-db
> (let ((o (radio #"orcl" #t))
> (r (radio #"rndba" #f)))
> (formlet
> (div "orcl" ,(o . => . orcl)
> "rndba" ,(r . => . rndba))
> (values orcl rndba))))
>
> But when I use formlet-process to extract the result (just clicking submit,
> leaving the checked box checked), I get the values #<binding:form> and #f...
> (and see input_0=on in the browser).
>
> Also I was trying to add a binding name to the radio function calls
> themselves, e.g. (radio #"xx" #f . => . myname), but this throws a syntax
> error.
>
> Could anyone offer a hint what I'm doing wrong here?
>
> (BTW this list has the most helpful people & inspiring content of all mailing
> lists I know of , and I'm not writing this in order to get a nice answer :-) )
>
> Ciao
> Sigrid
>
>
> ____________________
> Racket Users list:
> http://lists.racket-lang.org/users
--
Jay McCarthy <j...@cs.byu.edu>
Assistant Professor / Brigham Young University
http://faculty.cs.byu.edu/~jay
"The glory of God is Intelligence" - D&C 93
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