按按钮更改Python画布颜色

Question

我是一个python自学者。我一直在练习。 我的想法是创建一个弹出式GUI，按钮可以改变画布的颜色。在

from Tkinter import *
import ttk
import tkMessageBox

root = Tk()
root.title("Colour!")

canvasColor = "yellow"

def buttonRed() :
    canvas = Canvas(root, bg = "red", height=100, width=100) 
    canvas.grid(row=0,column=2)

button = ttk.Button(root, text="Red", command = buttonRed)
button.grid(row=2,column=1)

button2 = ttk.Button(root, text ="Green", command = buttonGreen) 
button2.grid(row=2,column=2)

button3 = ttk.Button(root, text="Blue", command = buttonBlue)
button3.grid(row=2,column=3)

canvas = Canvas(root, bg = canvasColor, height=200, width=200) 
canvas.grid(row=0,column=2)


root.configure(background='white')
root.mainloop()

我还没有输入绿色和蓝色按钮命令，但是我不想在单击颜色按钮时创建一个新画布，我只想更改默认画布颜色。在

任何帮助都将不胜感激！ 提前谢谢。在

Answer 1

我想这就是你需要的-

from Tkinter import *
import ttk
import tkMessageBox

root = Tk()
root.title("Colour!")

canvasColor = "yellow"

def buttonRed() :
    canvas.config(background="red")

def buttonGreen() :
    canvas.config(background="green")

def buttonBlue() :
    canvas.config(background="blue")

button = ttk.Button(root, text="Red", command = buttonRed)
button.grid(row=2,column=1)

button2 = ttk.Button(root, text ="Green", command = buttonGreen) 
button2.grid(row=2,column=2)

button3 = ttk.Button(root, text="Blue", command = buttonBlue)
button3.grid(row=2,column=3)

canvas = Canvas(root, bg = canvasColor, height=200, width=200) 
canvas.grid(row=0,column=2)
#canvas.config(background="black")

root.configure(background='white')
root.mainloop()