mirror of
https://github.com/rabbibotton/clog.git
synced 2025-12-06 10:40:45 -08:00
33 lines
1.2 KiB
Common Lisp
33 lines
1.2 KiB
Common Lisp
(defpackage #:clog-tut-3
|
|
(:use #:cl #:clog)
|
|
(:export start-tutorial))
|
|
|
|
(in-package :clog-tut-3)
|
|
|
|
(defun on-new-window (body)
|
|
"On-new-window handler."
|
|
(setf (title (html-document body)) "Tutorial 3")
|
|
(let ((hello-element
|
|
(create-section body :h1 :content "Hello World! (click me!)")))
|
|
(let ((x 0))
|
|
(set-on-click hello-element
|
|
(lambda (obj)
|
|
(declare (ignore obj))
|
|
(incf x)
|
|
(dotimes (n x)
|
|
(create-p body
|
|
:content (format nil "Clicked ~A times." x))
|
|
(sleep x)))))
|
|
(run body)))
|
|
|
|
;;; Running this version of the last tutorial and clicking quickly on the (click me!)
|
|
;;; will demonstrate an important aspect of CLOG, events can happen in _parallel_.
|
|
;;; This means that appropriate precautions to thread protect data should be taken
|
|
;;; and that events do not wait for previous event handlers to complete. One simple
|
|
;;; way to avoid issues is to use the key :one-time t on the set-on-click or other
|
|
;;; event, this will turn off the event immediately when the user clicks and can then
|
|
;;; set the event again when done handling the event if want to again accept the event.
|
|
(defun start-tutorial ()
|
|
"Start turtorial."
|
|
(initialize #'on-new-window)
|
|
(open-browser))
|