# bounce: move some text around the screen

import pippy
import pygame
import sys
from pygame.locals import *

# the text to bounce around the screen
msg = 'Hello!'

# the size of the text, in pixels
fsize = 36

# vector for motion, will control speed and angle
mvect = [3, 2]

# always need to init first thing
pygame.init()

# turn off cursor
pygame.mouse.set_visible(False)

# create the window and keep track of the surface
# for drawing into
screen = pygame.display.set_mode()

# ask for screen's width and height
size = width, height = screen.get_size()

# create a Font object from a file, or use the default
# font if the file name is None. size param is height
# in pixels

# usage: pygame.font.Font(filename|object, size)
font = pygame.font.Font(None, fsize)

# Font.render draws text onto a new surface.
#
# usage: Font.render(text, antialias, color, bg=None)
text = font.render(msg, True, (10, 10, 10))

# the Rect object is used for positioning
textRect = text.get_rect()

# start at the top left
textRect.left = 0
textRect.top = 0

while pippy.pygame.next_frame():

    # every time we move the text, check for quit or keydown events and exit
    for event in pygame.event.get():
        if event.type == QUIT:
            sys.exit()

        elif event.type == KEYDOWN:
            sys.exit()

    # fill the screen with almost white
    screen.fill((250, 250, 250))

    # draw the text
    screen.blit(text, textRect)

    # update the display
    pygame.display.flip()

    # move the text
    #
    # Rect.move returns a new Rect while
    # Rect.move_ip moves in place, so we'll use
    # the latter
    textRect.move_ip(mvect)

    # bounce off edges
    if textRect.left < 0:
        textRect.left = 0
        mvect[0] = -1 * mvect[0]
    elif textRect.right >= size[0]:
        textRect.right = size[0] - 1
        mvect[0] = -1 * mvect[0]

    if textRect.top < 0:
        textRect.top = 0
        mvect[1] = -1 * mvect[1]
    elif textRect.bottom >= size[1]:
        textRect.bottom = size[1] - 1
        mvect[1] = -1 * mvect[1]