stk/Contrib/STk-wtour/lessons/radiobutton.stk

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;; A set of radio button widgets
(define color-var1 #f) ;; The variable to which radiobuttons are "connected"
(radiobutton '.b1 :text "Red" :variable 'color-var1 :value "R" :anchor "w")
(radiobutton '.b2 :text "Green" :variable 'color-var1 :value "G" :anchor "w")
(radiobutton '.b3 :text "Blue" :variable 'color-var1 :value "B" :anchor "w")
(pack .b1 .b2 .b3 :fill "x")