upiwin/scripts/test_clipping.py

# Test of line clipping
import upiwin

hdc = upiwin.DevCtxt(type='screen')
hdc.text_color = 0xFFFFFF  # white
hdc.rectangle(99, 99, 200, 200)

clip = hdc.get_clip_rect()
hdc.set_clip_rect(100, 100, 200, 200)

hdc.text_color = 0x0000FF  # red
hdc.move_to(50, 200)
hdc.line_to(200, 50)

hdc.text_color = 0x00FF00  # green
hdc.move_to(250, 200)
hdc.line_to(100, 50)

hdc.text_color = 0xFF0000  # blue
hdc.move_to(50, 100)
hdc.line_to(200, 250)

hdc.text_color = 0x00FFFF  # yellow
hdc.move_to(250, 100)
hdc.line_to(100, 250)

hdc.set_clip_rect(clip[0], clip[1], clip[2], clip[3])

msg = {}
while upiwin.get_message(msg):
	if msg['message'] == upiwin.WM_HWBUTTONUP:
		bn = msg['attrs'][0]
		if bn == 4:
			print("Quitting the application.")
			upiwin.post_quit_message(0)