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factor out creating of input page

This commit is contained in:
interp 2003-03-09 19:57:09 +00:00
parent b12070e349
commit 4af92bc379
1 changed files with 21 additions and 20 deletions
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41
scheme/httpd/surflets/web-server/root/surflets/add-surflet.scm
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@ -1,43 +1,44 @@
(define-structure surflet surflet-interface
(open surflets
url
scheme-with-scsh)
(begin
(define number-input-field (make-number-input-field))
(define (create-input-page title input-text)
(lambda (new-url)
`(html (title ,title)
(body
(h2 ,title)
(p
(surflet-form ,new-url
,input-text " "
,number-input-field
,(make-submit-button)))
(hr)
(p (URL "/" "Return to main menu.") (br)
(URL "add-surflet.scm" "Start new calculation."))))))
(define (get-number title input-text)
(let* ((result
(send-html/suspend
(lambda (new-url)
`(html (title ,title)
(body
(h2 ,title)
(p
(surflet-form ,new-url
,input-text " "
,number-input-field
,(make-submit-button)))
(hr)
(p (URL "/" "Return to main menu.") (br)
(URL "add-surflet.scm" "Start new calculation.")))))))
(let* ((result (send-html/suspend
(create-input-page title input-text)))
(bindings (get-bindings result))
(number (input-field-value number-input-field bindings)))
(if number
number
(get-number title "Please enter a valid number."))))
(define (get-number1)
(get-number "Calculation - Step one" "First number:"))
(define (get-number-1)
(get-number "Addition - Step one" "First number:"))
(define (get-number2)
(get-number "Calculation - Step two" "Second number:"))
(define (get-number-2)
(get-number "Addition - Step two" "Second number:"))
(define (main req)
(send-html
`(html (title "Result")
(body (h2 "Result")
(p ,(number->string (+ (get-number1) (get-number2)))
(p ,(+ (get-number-1) (get-number-2))
(hr)
(p (URL "add-surflet.scm" "Make new calculation.") (br)
(URL "javascript:history.go(-2)" "New calculation (same session)")