Introduction
Installation of Pygame with Pycharm
Basics of Pygame
Running simple Pygame programs which do almost nothing.
A very simple program
A demonstration of a simple program showing the structure of Pygame programming.
import pygame
#initialization
pygame.init()
#create the screen
screen=pygame.display.set_mode((300,300))
windowrunning = True
while windowrunning: #main loop
for event in pygame.event.get(): #event loop
if event.type == pygame.QUIT:
windowrunning=False
if event.type == pygame.MOUSEBUTTONDOWN:
mousex, mousey = pygame.mouse.get_pos()
print("ButtonDown" + " " + str(mousex) + " " + str(mousey))
pygame.draw.circle(screen, (255, 0, 0), (mousex, mousey), 5, 1)
pygame.display.update()
if event.type == pygame.MOUSEMOTION:
mousex, mousey = pygame.mouse.get_pos()
pygame.draw.circle(screen, (255, 255, 255), (mousex, mousey), 1, 1)
pygame.display.update()
pygame.display.quit()
pygame.quit()
Pygame Simple Drawing Application
If the line is a sequence of dots then this is a drawing application. Pretty useless but a stepping stone.
import pygame
#initialization
pygame.init()
#create the screen
screen=pygame.display.set_mode((1280,720))
windowrunning = True
img=1
write=0
while windowrunning: #main loop
for event in pygame.event.get(): #event loop
if event.type == pygame.QUIT:
windowrunning=False
if event.type == pygame.MOUSEBUTTONDOWN:
mousex, mousey = pygame.mouse.get_pos()
write=1
if event.type == pygame.MOUSEBUTTONUP:
write=0
if event.type == pygame.MOUSEMOTION and write==1:
mousex, mousey = pygame.mouse.get_pos()
if pygame.mouse.get_pressed()[0]: #Red for Left
pygame.draw.circle(screen, (255, 0, 0), (mousex, mousey), 1, 1)
if pygame.mouse.get_pressed()[2]: #Green for Right
pygame.draw.circle(screen, (0, 255, 0), (mousex, mousey), 1, 1)
if pygame.mouse.get_pressed()[1]: #Blue for Middle
pygame.draw.circle(screen, (0, 0, 255), (mousex, mousey), 1, 1)
pygame.display.update()
if event.type == pygame.KEYDOWN:
print ("Key" + str(event.key))
if event.key== 115:
imgname="image"+"{0:03}".format(img)+".jpg"
pygame.image.save(screen, imgname)
img=img+1
pygame.display.quit()
pygame.quit()
Blackboard Application
We iron out the kinks in the basic drawing app to build a blackboard app.
import pygame
#initialization
pygame.init()
#create the screen
screen=pygame.display.set_mode((1280,720))
windowrunning = True #main loop variable
img=1 #saved photo counter
write=0 #flag for writing lines
r=255 #red color
g=0 #green color
b=0 #blue color
thickness=1 #thickness of line
rect=0 #flag for writing rectangle
while windowrunning: #main loop
for event in pygame.event.get(): #event loop
if event.type == pygame.QUIT:
windowrunning=False
if event.type == pygame.MOUSEBUTTONDOWN:
mousex, mousey = pygame.mouse.get_pos()
write=1
if event.type == pygame.MOUSEBUTTONUP:
mousex1, mousey1 = pygame.mouse.get_pos()
if(rect==1):
pygame.draw.rect(screen, (r, g, b),
(mousex, mousey, (mousex1-mousex), (mousey1-mousey)) , 1)
write=0
rect=0
pygame.display.update()
if event.type == pygame.MOUSEMOTION and write==1:
mousex1, mousey1 = pygame.mouse.get_pos()
if pygame.mouse.get_pressed()[0]:
pygame.draw.line(screen, (r, g, b), (mousex, mousey),
(mousex1, mousey1) , thickness)
mousex=mousex1
mousey=mousey1
if pygame.mouse.get_pressed()[2]:
rect=1
pygame.display.update()
if event.type == pygame.KEYDOWN:
print ("Key" + str(event.key))
if event.key== 115:
imgname="image"+"{0:03}".format(img)+".jpg"
pygame.image.save(screen, imgname)
img=img+1
if event.key== pygame.K_DELETE:
screen.fill((0,0,0))
pygame.display.update()
if event.key== pygame.K_y:
r,g,b=255,255,0
if event.key== pygame.K_r:
r,g,b=255,0,0
if event.key== pygame.K_w:
r,g,b=255,255,255
if event.key== pygame.K_b:
r,g,b=0,0,255
if event.key== pygame.K_g:
r,g,b=0,255,0
if event.key== 61: #plus key
if thickness < 10:
thickness = thickness +1
if event.key == pygame.K_MINUS:
if thickness>1:
thickness = thickness - 1
pygame.display.quit()
pygame.quit()