# 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
screen_rect = hdc.get_clip_rect()
drawing_rect = (screen_rect[0], screen_rect[1], screen_rect[2] - 60, screen_rect[3])
command_rect = (drawing_rect[2], screen_rect[1], screen_rect[2], screen_rect[3])

# further divide up the "command" area
cmd1_rect = (command_rect[0], command_rect[1], command_rect[2], 60)
cmd2_rect = (command_rect[0], 60, command_rect[2], 120)
cmd3_rect = (command_rect[0], 120, command_rect[2], 180)
cmd4_rect = (command_rect[0], 180, command_rect[2], command_rect[3])

def point_in_rect(rect, x, y):
	return (x >= rect[0]) and (x < rect[2]) and (y >= rect[1]) and (y < rect[3])



# --- Graphic feedback --

origin_x = 0
origin_y = 0
current_x = 0
current_y = 0

def rubberband_rectangle(x, y, down, up):
	global current_x, current_y
	hdc.text_color = YELLOW
	hdc.rop2 = upiwin.R2_XORPEN
	if not down:
		hdc.rectangle(min(origin_x, current_x), min(origin_y, current_y), max(origin_x, current_x), max(origin_y, current_y))
	current_x = x
	current_y = y
	if not up:
		hdc.rectangle(min(origin_x, current_x), min(origin_y, current_y), max(origin_x, current_x), max(origin_y, current_y))






# --- Message handlers ---

def on_touchdown(x, y):
	global origin_x, origin_y
	if point_in_rect(drawing_rect, x, y):
		origin_x = x
		origin_y = y
		rubberband_rectangle(x, y, True, False)
		
def on_touchmove(x, y):
	if point_in_rect(drawing_rect, x, y):
		rubberband_rectangle(x, y, False, False)
		
def on_touchup(x, y):
	if point_in_rect(drawing_rect, x, y):
		rubberband_rectangle(x, y, False, True)

def on_touchclick(x, y):
	print("Click at {0},{1}".format(x, y))
	if point_in_rect(cmd1_rect, x, y):
		print("Click command 1")
	elif point_in_rect(cmd2_rect, x, y):
		print("Click command 2")
	elif point_in_rect(cmd3_rect, x, y):
		print("Click command 3")
	elif point_in_rect(cmd4_rect, x, y):
		print("Click command 4")

def on_button_click(button):
	if button == 4:			# Button 4 = Exit app
		upiwin.post_quit_message(0)

# --- Initialize and start message loop ---

# Draw the basic layout.
hdc.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_TOUCHDOWN:
		on_touchdown(msg['attrs'][0], msg['attrs'][1])
	if msg['message'] == upiwin.WM_TOUCHMOVE:
		on_touchmove(msg['attrs'][0], msg['attrs'][1])
	if msg['message'] == upiwin.WM_TOUCHUP:
		on_touchup(msg['attrs'][0], msg['attrs'][1])
	if msg['message'] == upiwin.WM_TOUCHCLICK:
		on_touchclick(msg['attrs'][0], msg['attrs'][1])
	elif msg['message'] == upiwin.WM_HWBUTTONCLICK:
		on_button_click(msg['attrs'][0])