如何在無需單擊按鈕的情況下獲取 Tkinter 比例的值？我下面的代碼工作正常...但我需要一種方法來獲取值，而無需單擊移動 Tkinter 比例尺時自動更改值的按鈕。from tkinter import *def sel(): selection = "Value = " + str(var.get()) label.config(text = selection)root = Tk()var = DoubleVar()scale = Scale( root, variable = var )scale.pack(anchor=CENTER)button = Button(root, text="Get Scale Value", command=sel)button.pack(anchor=CENTER)label = Label(root)label.pack()root.mainloop()
2 回答
陪伴而非守候
TA貢獻1757條經驗 獲得超8個贊
command您可以在對象中使用該選項Scale：
from tkinter import *
def sel(val=0): # pass new scale value
#selection = "Value = " + str(var.get())
#label.config(text = selection)
label.config(text = val)
root = Tk()
var = DoubleVar()
scale = Scale( root, variable = var, command=sel) # call sel function on change
scale.pack(anchor=CENTER)
button = Button(root, text="Get Scale Value", command=sel)
button.pack(anchor=CENTER)
label = Label(root)
label.pack()
root.mainloop()
瀟瀟雨雨
TA貢獻1833條經驗 獲得超4個贊
使用文本變量代替文本參數：
from tkinter import *
root = Tk()
var = DoubleVar()
scale = Scale( root, variable = var )
scale.pack(anchor=CENTER)
label = Label(root, textvariable=var)
label.pack()
root.mainloop()
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