问题描述
限时送ChatGPT账号..我想在 Tkinter 中创建一条线,更改高度后,我需要删除前一行并使用新高度创建一条新线,这是一个重复的过程.
I want to create a line in the Tkinter and after changing the height I need to delete the previous line and create a new line with the new height, this is a repeated process.
为此,我阅读了python的Tkinter教程,我认为After
方法可能有用.所以,我写了我的想法,但这不是一个好方法,我无法创建它.另外,我在 Tkinter 中搜索了 Shown
事件,但在窗口的 Tkinter 中没有找到 Shown
事件.
To this, I read the tutorial of the Tkinter of python and I think the After
method might be useful. So, I write my idea but it is not a good method and I cannot create it. Also, I searched about a Shown
event in the Tkinter, but I did not find the Shown
event in the Tkinter for the window.
这是我建议的代码:
from tkinter import *
from tkinter import messagebox
import numpy as np
import random
window = Tk()
window.geometry("600x400+650+200")
window.resizable(0, 0)
window.title("Ball Balancing Game - QLearning")
canvas = Canvas()
def uptodate():
canvas.delete(line1)
line1 = canvas.create_line(100, 200, 500, h)
# for i in range(len(h) - 1):
# for j in range(len(h) - 1):
#
# line1 = canvas.create_line(100, h[i], 500, h[j])
# line2 = canvas.create_line(100, h[i+1], 500, h[j+1])
# # lines = canvas.create_line(0,0,600,400)
# # balls = canvas.create_oval(200, 150, 230, 110, outline="gray", fill="gray", width=6)
# canvas.pack(fill=BOTH, expand=1)
# canvas.delete(line1)
# window.update()
# window.after()
# canvas.delete(lines)
# canvas.update()
# lines.destroy()
# i = w.create_line(xy, fill="red")
line = canvas.create_line(100, 200, 500, 200)
canvas.pack(fill=BOTH, expand=1)
window.after(1000, uptodate())
window.mainloop()
推荐答案
不需要删除,可以更新所有行:
Don't need to delete, you can update all of lines:
import tkinter as tk
import random
import numpy as np
class App(tk.Tk):
def __init__(self):
tk.Tk.__init__(self)
self.frame = tk.Frame(self, background="bisque")
self.frame.pack(side="top", fill="both", expand=True)
self.canvas = tk.Canvas(self.frame)
self.line = self.canvas.create_line(100, 100, 300, 200, fill="blue")
self.canvas.pack(side="top", fill="both", expand=True)
self.draw_line()
def remove_line(self, line):
self.canvas.delete(line)
def get_h(self):
h1 = [-1, -0.86, -0.71, -0.57, -0.43, -0.29, -0.14, 0, 0.14, 0.29,0.43, 0.57, 0.71, 0.86, 1]
map_h = np.linspace(100, 300, 15)
map_h = np.around(map_h, 3)
map_h = map_h.tolist()
rnd_h1 = map_h[h1.index(random.choice(h1))]
rnd_h2 = map_h[h1.index(random.choice(h1))]
return rnd_h1, rnd_h2
def draw_line(self):
rnd_h1, rnd_h2 = self.get_h()
self.canvas.coords(self.line, 100, rnd_h1, 300, rnd_h2)
self.after(1000, self.draw_line)
app = App()
app.mainloop()
这篇关于显示窗口后如何从 Tkinter 中删除画布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!
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