自动移动形状?Python 3.5 Tkinter [英] Automatically Moving Shape? Python 3.5 Tkinter
问题描述
在python中，我目前正在使用tkinter进行游戏"，但它决定不起作用.我想做的是用鼠标移动一个矩形，而另一个矩形则连续不断地上下移动，而玩家无需做任何事情.这是我的代码:
In python, I am currently making a 'game' using tkinter, but it has decided not to work. What I am trying to do is have one rectangle movable by the mouse, and the other rectangle that moves up and down continuously without the player doing anything. Here is my code:
from tkinter import *
import time
root = Tk()
root.title("Game")
root.geometry("800x800")
def motion():
canvas.delete(ALL)
a = canvas.create_rectangle(event.x-50, event.y-50, event.x+50, event.y+50, fill='red')
def motion2():
b = canvas.create_rectangle(10, 100, 100, 10, fill='blue')
y = -15
x = 0
time.sleep(0.025)
canvas.move(b, x, -y)
canvas.update()
canvas = Canvas(root, width=1000, height=5000, bg='white')
canvas.bind("<Motion>", motion)
canvas.pack(pady=0)
mainloop()
我希望这可以尽快解决.在过去的几天里，我一直在努力，仍然没有答案.谢谢您的时间:)-杰克
I hope this can be resolved soon. I've been working on this for the past few days, still no answer. Thanks for your time :) -Jake
推荐答案
您可以使用 root.after(毫秒，function_name)定期运行函数，也可以使用 canvas.move(object_id，offset_x，offset_y)以自动移动对象.
You can use root.after(milliseconds, function_name) to run function periodically and it can use canvas.move(object_id, offset_x, offset_y) to move object automatically.
然后您可以使用 canvas.coords(object_id，x1，y1，x2，y2)使用鼠标位置来设置新位置. bind 使用一个参数(对象 event )执行函数，因此函数必须接收该参数.
And you can use canvas.coords(object_id, x1, y1, x2, y2) to set new position using mouse position. bind exeecutes function with one argument (object event) so function has to receive this argument.
import tkinter as tk
# --- functions ---
def move_a(event):
canvas.coords(a, event.x-50, event.y-50, event.x+50, event.y+50)
def move_b():
canvas.move(b, 1, 0)
# move again after 25ms (0.025s)
root.after(25, move_b)
# --- main ---
# init
root = tk.Tk()
# create canvas
canvas = tk.Canvas(root)
canvas.pack()
# create objects
a = canvas.create_rectangle(0, 0, 100, 100, fill='red')
b = canvas.create_rectangle(0, 0, 100, 100, fill='blue')
# start moving `a` with mouse
canvas.bind("<Motion>", move_a)
# start moving `b` automatically
move_b()
# start program
root.mainloop()
要上下移动，您必须使用具有 speed 的变量，以便可以将其从 speed 更改为-速度，然后再次设置为速度.您还可以使用 move_down = True/False 检查当前方向(或者您可以使用 speed 检查方向，但是 b_move_down 更具可读性为人)
to move up and down you have to use variable with speed so you can change it from speed to -speed and againt to speed. And you can also use move_down = True/False to check current direction (or you can use speed to check direction but b_move_down can be more readable for people)
import tkinter as tk
# --- functions ---
def move_a(event):
canvas.coords(a, event.x-50, event.y-50, event.x+50, event.y+50)
def move_b():
# inform function to use external/global variable
# because we use `=` to change its value
global b_speed
global b_move_down
canvas.move(b, 0, b_speed)
# get current position
x1, y1, x2, y2 = canvas.coords(b)
# check if you have to change direction
#if b_speed > 0:
if b_move_down:
# if it reachs bottom
if y2 > 300:
# change direction
#b_move_down = False
b_move_down = not b_move_down
b_speed = -b_speed
else:
# if it reachs top
if y1 < 0:
# change direction
#b_move_down = True
b_move_down = not b_move_down
b_speed = -b_speed
# move again after 25 ms (0.025s)
root.after(25, move_b)
# --- main ---
# init
root = tk.Tk()
# create canvas
canvas = tk.Canvas(root, width=500, height=300)
canvas.pack()
# create objects
a = canvas.create_rectangle(0, 0, 100, 100, fill='red')
b = canvas.create_rectangle(0, 0, 100, 100, fill='blue')
# create global variables
b_move_down = True
b_speed = 5
# start moving `a` with mouse
canvas.bind("<Motion>", move_a)
# start moving `b` automatically
move_b()
# start program
root.mainloop()
编辑:在画布上移动
import tkinter as tk
# --- functions ---
def move_a(event):
canvas.coords(a, event.x-50, event.y-50, event.x+50, event.y+50)
def move_b():
# inform function to use external/global variable
# because we use `=` to change its value
global b_speed_x
global b_speed_y
global b_direction
canvas.move(b, b_speed_x, b_speed_y)
# get current position
x1, y1, x2, y2 = canvas.coords(b)
if b_direction == 'down':
if y2 >= 300:
b_direction = 'right'
b_speed_x = 5
b_speed_y = 0
elif b_direction == 'up':
if y1 <= 0:
b_direction = 'left'
b_speed_x = -5
b_speed_y = 0
elif b_direction == 'right':
if x2 >= 500:
b_direction = 'up'
b_speed_x = 0
b_speed_y = -5
elif b_direction == 'left':
if x1 <= 0:
b_direction = 'down'
b_speed_x = 0
b_speed_y = 5
# move again after 25 ms (0.025s)
root.after(25, move_b)
# --- main ---
# init
root = tk.Tk()
# create canvas
canvas = tk.Canvas(root, width=500, height=300)
canvas.pack()
# create objects
a = canvas.create_rectangle(0, 0, 100, 100, fill='red')
b = canvas.create_rectangle(0, 0, 100, 100, fill='blue')
# create global variables
b_direction = 'down'
b_speed_x = 0
b_speed_y = 5
# start moving `a` with mouse
canvas.bind("<Motion>", move_a)
# start moving `b` automatically
move_b()
# start program
root.mainloop()
最后一个示例-键 p 暂停游戏
last example - key p pauses game
#!/usr/bin/env python3
import tkinter as tk
# --- constants --- (UPPER_CASE names)
DISPLAY_WIDHT = 800
DISPLAY_HEIGHT = 600
# --- classes --- (CamelCase names)
#class Player():
# pass
#class BlueEnemy():
# pass
# --- functions --- (lower_case names)
def move_a(event):
# don't move if gama paused
if not game_paused:
canvas.coords(a, event.x-50, event.y-50, event.x+50, event.y+50)
def move_b():
# inform function to use external/global variable
# because we use `=` to change its value
global b_speed_x
global b_speed_y
global b_direction
# don't move if gama paused
if not game_paused:
canvas.move(b, b_speed_x, b_speed_y)
# get current position
x1, y1, x2, y2 = canvas.coords(b)
if b_direction == 'down':
if y2 >= DISPLAY_HEIGHT:
b_direction = 'right'
b_speed_x = 5
b_speed_y = 0
elif b_direction == 'up':
if y1 <= 0:
b_direction = 'left'
b_speed_x = -5
b_speed_y = 0
elif b_direction == 'right':
if x2 >= DISPLAY_WIDHT:
b_direction = 'up'
b_speed_x = 0
b_speed_y = -5
elif b_direction == 'left':
if x1 <= 0:
b_direction = 'down'
b_speed_x = 0
b_speed_y = 5
# move again after 25 ms (0.025s)
root.after(25, move_b)
def pause(event):
global game_paused
# change True/False
game_paused = not game_paused
if game_paused:
# center text on canvas
canvas.coords(text_pause, DISPLAY_WIDHT//2, DISPLAY_HEIGHT//2)
else:
# move text somewhere outside canvas
canvas.coords(text_pause, -1000, -1000)
# --- main --- (lower_case names)
# init
root = tk.Tk()
# key `p` pause game
game_paused = False
root.bind('p', pause)
# create canvas
canvas = tk.Canvas(root, width=DISPLAY_WIDHT, height=DISPLAY_HEIGHT)
canvas.pack()
# create objects
a = canvas.create_rectangle(0, 0, 100, 100, fill='red')
b = canvas.create_rectangle(0, 0, 100, 100, fill='blue')
# create global variables
b_direction = 'down'
b_speed_x = 0
b_speed_y = 5
# start moving `a` with mouse
canvas.bind("<Motion>", move_a)
# start moving `b` automatically
move_b()
# create text somewhere outside canvas - so it will be "invisible"
text_pause = canvas.create_text(-1000, -1000, text="PAUSED", font=(50,))
# start program
root.mainloop()
这篇关于自动移动形状?Python 3.5 Tkinter的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
