added the rgb function to upiwin and started building the demo script

scripts/demo1.py

@@ -0,0 +1,58 @@
+# Demo script that implements a simple drawing program
+import upiwin
+
+# Save off some color values.
+WHITE = upiwin.rgb(255, 255, 255)
+LTGRAY = upiwin.rgb(204, 204, 204)
+YELLOW = upiwin.rgb(255, 255, 0)
+
+hdc = upiwin.DevCtxt(type='screen')
+
+# divide the screen into "drawing" and "command" areas
+drawing_rect = hdc.get_clip_rect()
+command_rect = drawing_rect
+drawing_rect[2] -= 60;
+command_rect[0] = drawing_rect[2] + 1
+
+# further divide up the "command" area
+cmd1_rect = command_rect
+cmd2_rect = command_rect
+cmd3_rect = command_rect
+cmd4_rect = command_rect
+cmd1_rect[3] = 60;
+cmd2_rect[1] = 60;
+cmd2_rect[3] = 120;
+cmd3_rect[1] = 120;
+cmd3_rect[3] = 180;
+cmd4_rect[1] = 180;
+
+def point_in_rect(rect, x, y):
+	return (x >= rect[0]) and (x < rect[2]) and (y >= rect[1]) and (y < rect[3])
+
+
+
+
+# --- Initialize and start message loop ---
+
+# Draw the basic layout.
+hdc.set_text_color(LTGRAY)
+hdc.rectangle(cmd1_rect[0], cmd1_rect[1], cmd1_rect[2], cmd1_rect[3])
+hdc.rectangle(cmd2_rect[0], cmd2_rect[1], cmd2_rect[2], cmd2_rect[3])
+hdc.rectangle(cmd3_rect[0], cmd3_rect[1], cmd3_rect[2], cmd3_rect[3])
+hdc.rectangle(cmd4_rect[0], cmd4_rect[1], cmd4_rect[2], cmd4_rect[3])
+
+# Main message loop
+msg = {}
+while upiwin.get_message(msg):
+	if msg['message'] == upiwin.WM_TOUCHCLICK:
+		if point_in_rect(cmd1_rect, msg['attrs'][0], msg['attrs'][1]):
+			print("Click command 1")
+		elif point_in_rect(cmd2_rect, msg['attrs'][0], msg['attrs'][1]):
+			print("Click command 2")
+		elif point_in_rect(cmd3_rect, msg['attrs'][0], msg['attrs'][1]):
+			print("Click command 3")
+		elif point_in_rect(cmd4_rect, msg['attrs'][0], msg['attrs'][1]):
+			print("Click command 4")
+	elif msg['message'] == upiwin.WM_HWBUTTONCLICK:
+		if msg['attrs'][0] == 4:			# Button 4 = Exit app
+			upiwin.post_quit_message(0)