36 lines
1.4 KiB
Scheme
36 lines
1.4 KiB
Scheme
#lang web-server
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(require (lib "web-cell-component.ss" "web-server" "lang"))
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(provide start)
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(define (start initial-request)
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; A top-level frame must exist
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(define counter1 (make-counter))
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(define counter2 (make-counter))
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; counter1 and counter2 must have been added to the top-level frame
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(define include1 (include-counter counter1))
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(define include2 (include-counter counter2))
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; counter1 and counter2 may have been modified
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(send/suspend/dispatch
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(lambda (embed/url)
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; The frame (ref) must have been captured, any changes to web-cells after this will be lost
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`(html
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(body (h2 "Web Cell Test")
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(div (h3 "First")
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,(include1 embed/url))
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(div (h3 "Second")
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,(include2 embed/url)))))))
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(define (make-counter) (make-web-cell 0))
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(define-component (include-counter counter (a-counter) embed/url)
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`(div (h3 ,(number->string (web-cell-ref a-counter)))
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(a ([href ,(url->string
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(embed/url
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(lambda _
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; A new frame has been created
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(define last (web-cell-ref a-counter))
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; It is a child of the parent frame, so we can inspect the value
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(web-cell-shadow a-counter (add1 last))
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; The new frame has been modified
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(counter))))])
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"+")))
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