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58 lines
1.9 KiB
Common Lisp
58 lines
1.9 KiB
Common Lisp
(defpackage #:clog-user
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(:use #:cl #:clog)
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(:export start-tutorial))
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(in-package :clog-user)
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(defun on-new-window (body)
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(let* ((target1 (create-div body))
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(target2 (create-div body))
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(object (create-div target1))
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(msg (create-div body
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:content "Drag green box to other yellow box")))
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;; Instructions
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(setf (positioning msg) :fixed)
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(setf (top msg) "125px")
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;; Box 1
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(setf (positioning target1) :fixed)
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(setf (top target1) "10px")
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(setf (left target1) "10px")
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(setf (width target1) "100px")
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(setf (height target1) "100px")
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(setf (background-color target1) :yellow)
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;; Box 2
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(setf (positioning target2) :fixed)
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(setf (top target2) "10px")
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(setf (left target2) "140px")
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(setf (width target2) "100px")
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(setf (height target2) "100px")
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(setf (background-color target2) :yellow)
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;; Box to Drag
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(setf (positioning object) :absolute)
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(setf (top object) "10px")
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(setf (left object) "10px")
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(setf (width object) "50px")
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(setf (height object) "50px")
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(setf (background-color object) :green)
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;; To allow for drag and drop requires:
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;;
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;; 1 object is draggable
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(setf (draggablep object) t)
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;; 2 the on-drag-start event is set
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(set-on-drag-start object (lambda (obj)()) :drag-data "some data")
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;; 4 the target on-drag-over event is sett
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(set-on-drag-over target1 (lambda (obj)()))
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;; 5 the target on-drop event is set
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(set-on-drop target1 (lambda (obj data)
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(place-inside-bottom-of target1 object)))
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;; Set up other box 1 also as target for returning drag box
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(set-on-drag-over target2 (lambda (obj)()))
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(set-on-drop target2 (lambda (obj data)
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(print (getf data :drag-data))
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(place-inside-bottom-of target2 object)))
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(run body)))
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(defun start-tutorial ()
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"Start tutorial."
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(initialize #'on-new-window)
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(open-browser))
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