RosettaCodeData/Task/Simple-windowed-application/EchoLisp/simple-windowed-application...

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(define (ui-add-button text) ;; helper
(define b (ui-create-element "button" '((type "button"))))
(ui-set-html b text)
(ui-add b))
(define (panel )
(ui-clear)
(define *clicks* 0)
(define text (ui-create-element "span" '((style "font-weight:bold"))))
(ui-add text)
(ui-set-html text "No click yet")
(define btn (ui-add-button "Click-me"))
(define (count-clicks elem)
(++ *clicks*)
(ui-set-html text *clicks*))
(ui-on-click btn count-clicks)
(stdout-hide #t)
(stdin-hide #t)) ;; end panel definition
(panel)