PyGame : Test class show text "Hello World" .

I wrote in my journal:
Today I received an email in which I asked about python and how to display a text message. I hate this approach, especially on the internet there are hundreds of materials on this subject.
This made ​​me remember my blog and I write a new tutorial on pygame.
I use the old class from last pygame tutorials, see here.
The source code it's pretty simple.
The news is function show_text().
To do this I use pygame functions, see pygame documentation.
Let's see the final source code.

import pygame
from pygame.locals import *

screen_mode = (640, 480)
color_black = 0, 0, 0

class Game:
 def __init__(self):
  pygame.init()
  self.screen = pygame.display.set_mode(screen_mode)
  pygame.display.set_caption("Pygame text window")

  self.quit = False
  
 def update(self):
  print "update function"
  self.show_text()
  return
 
 def draw(self):
  self.screen.fill(color_black)
  self.show_text()
  pygame.display.flip()

 def show_text(self):
  font = pygame.font.Font(None, 36)
  text = font.render("Hello World!", 1, (100, 100, 100))
  textpos = text.get_rect()
  textpos.centerx = self.screen.get_rect().centerx
  self.screen.blit(text, textpos)

 def mainLoop(self):

  while not self.quit:
   for event in pygame.event.get():
    if event.type == pygame.QUIT:
     self.quit = True
    elif  event.type  == pygame.MOUSEBUTTONDOWN:
     print pygame.mouse.get_pressed()
     
     self.update()
   self.draw()
 
if __name__ == '__main__':
 game = Game()
 game.mainLoop()

The result is this:

PyGame : Test mouse class.

Today I will show how to test mouse with pygame.
This is very simple, just you try to use MOUSEBUTTONDOWN.
Also, the click mouse only registers once so you can use it with another event.
If you don't want to use an event handler, you can check for input with:

pygame.mouse.get_pos() 
pygame.mouse.get_pressed()

I created a class called Game, which contains four functions.
A function that needs to pay attention is mainLoop.
This function deals with events in the following order.
While there is no event QUIT then read events.
If there is event QUIT or MOUSEBUTTONDOWN then is running this:
Event QUIT the program is quit.
Event MOUSEBUTTONDOWN print mouse events next use update function with print "update function".
Press mouse buttons: left,right,mouse wheel ,spinning mouse wheel.

(1, 0, 0)
update function
(0, 0, 1)
update function
(0, 1, 0)
update function
(0, 0, 0)
update function

The code is shown below.

import pygame
from pygame.locals import *

screen_mode = (640, 480)
color_black = 0, 0, 0

class Game:
 def __init__(self):
  pygame.init()
  self.screen = pygame.display.set_mode(screen_mode)
  pygame.display.set_caption("Pygame first window")
  self.quit = False
  
 def update(self):
  print "update function"
  return
  
 def draw(self):
  self.screen.fill(color_black)
  pygame.display.flip()
  
 def mainLoop(self):
  while not self.quit:
   for event in pygame.event.get():
    if event.type == pygame.QUIT:
     self.quit = True
    elif  event.type  == pygame.MOUSEBUTTONDOWN:
     print pygame.mouse.get_pressed()
     self.update()
   self.draw()
 
if __name__ == '__main__':
 game = Game()
 game.mainLoop()