- basic "Hello World" example.

scheme/examples/hello.scm

@@ -0,0 +1,60 @@
+#!/bin/sh
+
+../../scxvm <<EOF
+
+,config ,load ../xlib/xlib-type-interfaces.scm ../xlib/xlib-type-package.scm ../xlib/xlib-interfaces.scm ../xlib/xlib-packages.scm
+,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