如何获取在 tkinter 的顶级小部件中输入的值并在 main window 中使用它来显示？

Question

我是 Python GUI 的新手并尝试学习使用 tkinter，我创建了一个主 window 单击主 window 中的“继续”按钮，一个顶层 window 打开，可以在输入框中输入一个数字，我无法读取主 window 中的值。任何人都可以帮助我如何读取在顶层 window 中输入的值并在主 window

中输入相同的值

from tkinter import *


# global variable
blank_2 = [] 
blank_1 = []

# Function to create a top level window with entry boxes
def open_new_window():
    # Toplevel object which will be treated as a new window
    popup = Toplevel(main)
    global blank_2
    global blank_1
    # sets the title of the Toplevel widget
    popup.title("Enter the value")

    # sets the geometry of toplevel
    popup.geometry("480x220")
    popup.geometry("+500+250")
    popup.configure(background='grey')
    PL = Label(popup, text="Enter the 1st value :", fg="white", bg="grey",
               font=('century gothic', 12))
    PL.place(x=20, y=20)
    GW = Label(popup, text="Enter the 2nd value :", fg="white", bg="grey",
               font=('century gothic', 12))
    GW.place(x=20, y=70)
    blank_2 = Entry(popup, justify=LEFT, font=12, fg="black", width=15)
    blank_2.place(x=210, y=20)
    blank_1 = Entry(popup, justify=LEFT, font=12, fg="black", width=15)
    blank_1.place(x=210, y=70)
    exitp = Button(popup, text='Quit', font=8, width=5, height=1, bd=4, command=popup.destroy)
    setp = Button(popup, text='Set', font=8, bd=4, command=sum)
    exitp.place(x=300, y=120)
    setp.place(x=240, y=120)
    blank_2.focus()

# Function to insert the value from the top level window to main window
def sum():
    global blank_2, blank_1
    LS.insert(END, blank_2)
    LS.insert(END, blank_1)


main = Tk()
main.title("TEST")                        # required text on window title
main.configure(background='grey')                   # Background color of Main window
main.geometry("+600+150")                           # Position of the window on the screen
main.geometry("400x450")                            # Size of the window

# text window to display the value in main window
LS = Text(main, bd=3, height=3, width=30, bg="light cyan")
LS.place(x=20, y=190)

# buttons to open a top level window and to quit the main window
C = Button(main, text='Continue', font=8, bd=4, command=open_new_window)
C.place(x=40, y=45)
Q = Button(main, text='Quit', font=8, width=5, height=1, bd=4, command=main.destroy)
Q.place(x=150, y=45)


mainloop()

The output in the main window

Answer 1

您需要调用 Entry 类的 get 方法

LS.insert(END, blank_2.get())
LS.insert(END, blank_1.get())

因为您将 blank_1 和 blank_2 定义为条目：

blank_2 = Entry(popup, justify=LEFT, font=12, fg="black", width=15)
blank_1 = Entry(popup, justify=LEFT, font=12, fg="black", width=15)

.!toplevel.!entry

是 tkinter 对 wdiget 的引用。

如何获取在 tkinter 的顶级小部件中输入的值并在 main window 中使用它来显示？

How to get a value entered in Top level widget in tkinter and use it in main window to display?

python

tkinter

python-3.x

tkinter-entry