scx/scheme/examples/hello.scm

#!/bin/sh

../../scx <<EOF

,batch on

,open xlib
,batch off

(define (hello text)
  (let* ((dpy (open-display))
	 (cm (copy-colormap-and-free (display-default-colormap dpy)))

	 ;; many ways to get color in your progs.
	 (black (black-pixel dpy))
	 (white (white-pixel dpy))
	 (blue (alloc-color! cm (make-color 0 0 1)))
	 (green (alloc-named-color cm "#00FF00"))
	 (red (alloc-named-color cm 'red))
	 
	 (win (create-window (display-default-root-window dpy)
			     300 200
			     'event-mask '(exposure button-press)
			     'background-pixel white
			     'colormap cm))
	 (gc (create-gcontext win
			      'background white
			      'foreground black
			      ))
	 (font (open-font dpy "*-new century schoolbook-bold-r*24*"))
	 (font2 (open-font dpy "*times*18*")))
    (set-wm-name! win '("scx Hello World Program"))
    (map-window win)

    (let event-loop ()
      (display-flush-output dpy)
      (let ((e (wait-event dpy)))
	(if
	 (case (event-type e)
	   ((expose)
	    (set-gcontext-font! gc font)
	    (set-gcontext-foreground! gc black)
	    (draw-poly-text win gc 10 25 text '1-byte)
	    (set-gcontext-foreground! gc blue)
	    (draw-poly-text win gc 20 50 (list font text) '1-byte)
	    (set-gcontext-foreground! gc red)
	    (set-gcontext-font! gc font2)
	    (draw-image-text win gc 30 75 text '1-byte)
	    #t)
	   (else #f))
	 (event-loop)
	 #f)))
    (close-display dpy)))

(hello "Hello World!")

,exit
y
EOF