Event (Event) is one of the important modules of Pygame. It is the core of building the entire game program, such as commonly used mouse clicks, keyboard taps, game window movements, and adjustments. Window size, triggering specific plots, exiting the game, etc., can all be regarded as "events".
Pygame defines a structure specifically used to process events, namely the event queue. This structure follows the basic principle of "first come, first processed" of the queue. Through the event queue, we User operations (triggered events) can be processed in an orderly and one-by-one manner. The following table lists commonly used game events in Pygame:
Name | Description |
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QUIT |
The user presses the close button of the window |
ATIVEEVENT |
Pygame Activate or hide |
KEYDOWN |
Keyboard press |
KEYUP |
Keyboard release |
MOUSEMOTION |
Mouse movement |
MOUSEBUTTONDOWN |
Mouse pressed |
MOUSEBUTTONUP |
Mouse released |
JOYAXISMOTION |
Game handle (Joystick or pad) movement |
##JOYBALLMOTION
| Gameball(Joy ball) Move|
Game Controller(Joystick) Move |
|
Game handle pressed |
|
Game handle released |
|
Pygame window scaling |
|
Pygame window partially exposed (expose) |
##USEREVENT |
Trigger a user event
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Event handling methodName
Get an event from the event queue and delete the event from the queue
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pygame.event.wait() | |||||||||||||||||||||||||||||||||||
Blocking will not continue until the event occurs. If no event occurs, it will remain blocked
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pygame.event.set_blocked() | |||||||||||||||||||||||||||||||||||
Control which events are prohibited from entering the queue. If the parameter value is None, it means that all events are prohibited from entering
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pygame.event.set_allowed() | |||||||||||||||||||||||||||||||||||
Control which events are allowed to enter the queue
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pygame.event.pump() | |||||||||||||||||||||||||||||||||||
After calling this method, Pygame will automatically process the event queue
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pygame.event.poll() | |||||||||||||||||||||||||||||||||||
will be processed according to the actual situation Returns a real event, or None
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##pygame.event.peek() | |||||||||||||||||||||||||||||||||||
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pygame.event.clear() | |||||||||||||||||||||||||||||||||||
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pygame.event.get_blocked() | |||||||||||||||||||||||||||||||||||
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pygame.event.post() | |||||||||||||||||||||||||||||||||||
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pygame.event.Event() | |||||||||||||||||||||||||||||||||||
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Name | Instructions |
---|---|
K_BACKSPACE | Backspace |
K_TAB | Tab |
K_CLEAR | Clear key (Clear) |
K_RETURN | Enter key (Enter) |
K_PAUSE | Pause button |
K_ESCAPE | Escape button |
K_SPACE | Space bar (Space) |
K_0...K_9 | 0…9 |
#K_a...Kz
| a…z|
K_DELETE
| Delete key (delete)|
0 (small keyboard)...9 (small keyboard) | |
F1…F15 | |
Up arrow | |
Towards Down arrow | |
right arrow | |
Left arrow | |
Press the Alt key at the same time |
import pygame import sys # 初始化pygame pygame.init() # 定义变量 size = width, height = 600, 400 bg = (255, 255, 255) # 加载logo图 img = pygame.image.load("./python.png") # 获取图像的位置 position = img.get_rect() # 创建一个主窗口 screen = pygame.display.set_mode(size) # 标题 pygame.display.set_caption("Python自学网") # 创建游戏主循环 while True: # 设置初始值 site = [0, 0] for event in pygame.event.get(): if event.type == pygame.QUIT: sys.exit() # 图像移动 KEYDOWN 键盘按下事件 # 通过 key 属性对应按键 if event.type == pygame.KEYDOWN: if event.key == pygame.K_UP: site[1] -= 8 if event.key == pygame.K_DOWN: site[1] += 8 if event.key == pygame.K_LEFT: site[0] -= 8 if event.key == pygame.K_RIGHT: site[0] += 8 # 移动图像 position = position.move(site) # 填充背景 screen.fill(bg) # 放置图片 screen.blit(img, position) # 更新显示界面 pygame.display.flip()
Handling mouse events
pygame.event.MOUSEMOTION mouse movement event
event.pos relative to the upper left corner of the window, the current coordinate value of the mouse (x, y)
event.rel mouse Relative movement distance (X, Y), relative to the last eventevent.buttons The initial state of the mouse button (0,0,0), corresponding to (left button, pulley, right button) respectively, which button is clicked during the movement, The corresponding position will change to 1
pygame.event.MOUSEBUTTONUP mouse button release eventevent.pos relative to the upper left corner of the window, the current coordinate value of the mouse (x, y)
event .button Mouse release key number (integer) The left button is 1, the scroll wheel is pressed 2, the right button is 3
pygame.event.MOUSEBUTTONDOWN Mouse button press eventevent.pos relative to The upper left corner of the window, the current coordinate value of the mouse (x, y)
event.button mouse button number (integer), the left button is 1, press the scroll wheel 2, the right button is 3, scroll the wheel 4 forward, Roll the pulley backward 5
import pygame from random import randint # 初始化程序 pygame.init() screen = pygame.display.set_mode((450, 400)) pygame.display.set_caption("Python自学网") # 更新显示 pygame.display.flip() while True: # 等待事件发生 event = pygame.event.wait() if event.type == pygame.QUIT: exit("成功退出") if event.type == pygame.MOUSEBUTTONDOWN: # pos 获取鼠标当前位置 print('鼠标按下', event.pos) mx, my = event.pos # 调用 pygame.draw 模块画圆 pygame.draw.circle(screen, (255, 255, 0), (mx, my), 50) # 处理完,更新显示 pygame.display.update() if event.type == pygame.MOUSEBUTTONUP: print('鼠标弹起') pass if event.type == pygame.MOUSEMOTION: print('鼠标移动') mx, my = event.pos # 随机生成 RGB 颜色值 r = randint(0, 255) g = randint(0, 255) b = randint(0, 255) pygame.draw.circle(screen, (r, g, b,), (mx, my), 50) # 处理完,更新显示 pygame.display.update()Copy after login
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