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;;; -*-Scheme-*-
(require 'xlib)
(define (hello-world)
(let* ((dpy (open-display))
(black (black-pixel dpy)) (white (white-pixel dpy))
(font (open-font dpy "*-new century schoolbook-bold-r*24*"))
(text (translate-text "Hello world!"))
(width (+ 2 (text-width font text '1-byte)))
(height (+ 2 (max-char-ascent font) (max-char-descent font)))
(win (create-window 'parent (display-root-window dpy)
'width width 'height height
'background-pixel white
'event-mask '(exposure button-press)))
(gc (create-gcontext 'window win 'background white
'foreground black 'font font)))
(map-window win)
(unwind-protect
(handle-events dpy #t #f
(button-press
(lambda ignore #t))
(expose
(lambda ignore
(let ((x (truncate (/ (- (window-width win) width) 2)))
(y (truncate (/ (- (+ (window-height win)
(max-char-ascent font))
(max-char-descent font)) 2))))
(draw-poly-text win gc x y text '1-byte)) #f)))
(close-display dpy))))
(hello-world)
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