37 lines
724 B
Common Lisp
37 lines
724 B
Common Lisp
; this demo shows how to use the mouse events to draw make a simple drawing tool.
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;
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(clear)
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;
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(def prev-pos {:x 0 :y 0})
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;
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(defn stroke-color
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(e)
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(if
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(eq e:is-down true) "#ffb545" "#72dec2"))
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;
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(defn draw-line
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(e)
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(
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(if
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(eq e:is-down true)
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(
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(debug e:is-down)
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(stroke
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(line prev-pos:x prev-pos:y e:x e:y) 2 "white")
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(set prev-pos "x" e:x "y" e:y)
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(debug prev-pos)
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(debug e)))))
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;
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(defn draw-circle
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(e)
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(
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(debug e)
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(set prev-pos "x" e:x "y" e:y)
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(debug e:x)
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(stroke
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(circle e:x e:y 10) 4
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(stroke-color e))))
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;
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(on "mouse-down" draw-circle)
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(on "mouse-up" draw-circle)
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(on "mouse-move" draw-line) |