69 lines
1.8 KiB
Scheme
Executable File
69 lines
1.8 KiB
Scheme
Executable File
#!/bin/sh
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exec scsh -ll sunterlib-0.5/sunterlib.scm -lel scx/load.scm -o xlib -o rendezvous-channels -s "$0" "$@"
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!#
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(define (regions)
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(let* ((dpy (open-display))
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(cm (screen:default-colormap (display:default-screen dpy)))
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(black (black-pixel dpy))
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(white (white-pixel dpy))
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(blue (color:pixel (alloc-named-color dpy cm "blue")))
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(win (create-simple-window dpy (default-root-window dpy)
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0 0 500 500 1
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black white))
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(gc (create-gc dpy win
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(make-gc-value-alist
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(background white)
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(foreground black))))
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(rectangles (list (make-rectangle 10 20 60 60)
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(make-rectangle 50 100 30 30)))
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(colors (list black blue))
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(regions-alist
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(map (lambda (rect text)
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(cons (union-rect-with-region (rectangle:x rect)
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(rectangle:y rect)
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(rectangle:width rect)
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(rectangle:height rect)
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(create-region))
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text))
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rectangles
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'("black rectangle" "blue rectangle"))))
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(map-window dpy win)
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(init-sync-x-events dpy)
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(call-with-event-channel
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dpy win (event-mask exposure button-press structure-notify)
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(lambda (channel)
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(let loop ()
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(let ((e (receive channel)))
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(cond
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;; Zeichnen...
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((expose-event? e)
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(for-each (lambda (rect color)
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(set-gc-foreground! dpy gc color)
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(fill-rectangles dpy win gc (list rect)))
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rectangles colors))
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;; Hit-Tests
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((button-event? e)
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(let* ((x (button-event-x e))
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(y (button-event-y e))
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(rs (filter (lambda (r-n)
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(point-in-region? (car r-n)
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x y))
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regions-alist)))
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(for-each (lambda (region-name)
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(display "You clicked: ")
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(display (cdr region-name))
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(newline))
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rs)
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;; break if none was hit.
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(if (null? rs)
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(begin
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(close-display dpy)
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(exit)))))))
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(loop))))))
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(regions)
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