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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)
-