Question

当我运行代码时，框出现在左上方，大部分都在屏幕视图之外。我已经检查了代码，但无法找到导致此问题的原因。谢谢你的帮助。

from tkinter import *
import sqlite3 
import LoginMenu

class LogOn:
    def __init__(self, window):
        self.window = window
        window.title("Log On")
        window.state("zoomed")

        h = self.window.winfo_height()
        w = self.window.winfo_width()
        Center_h = h/2
        Center_w = w/2


        self.FrameLogOn = Frame(window, bg = "PaleTurquoise1")
        self.FrameLogOn.place(x = Center_w , y = Center_h, anchor = "center")

        self.lbl_TrainerID = Label(self.FrameLogOn, text = "TrainerID:", bg = "PaleTurquoise1", font =("Arial","16"), width = 15)
        self.lbl_TrainerID.grid(row = 0, column = 0)
        self.ent_TrainerID = Entry(self.FrameLogOn, bg = "PaleTurquoise1", font =("Arial","16"))
        self.ent_TrainerID.grid(row = 0, column = 1)
        self.lbl_TrainerIDError = Label(self.FrameLogOn, text = "*TrainerID Not Found" ,bg = "PaleTurquoise1", font =("Arial","16"), fg = "PaleTurquoise1",  width = 15)
        self.lbl_TrainerIDError.grid(row = 0, column = 2)

        self.lbl_Password = Label(self.FrameLogOn, text = "Password:" ,bg = "PaleTurquoise1", font =("Arial","16"),  width = 15)
        self.lbl_Password.grid(row = 1, column = 0)
        self.ent_Password = Entry(self.FrameLogOn, bg = "PaleTurquoise1", font =("Arial","16"))
        self.ent_Password.grid(row = 1, column = 1)
        self.lbl_PasswordError = Label(self.FrameLogOn, text = "*Incorrect Password" ,bg = "PaleTurquoise1", font =("Arial","16"), fg = "PaleTurquoise1",  width = 15)
        self.lbl_PasswordError.grid(row = 1, column = 2)

        self.btn_LogIn = Button(self.FrameLogOn, text = "Log In", bg = "PaleTurquoise1", font =("Arial", "16"),  width = 15, command = self.LogIn)
        self.btn_LogIn.grid(row = 2, column = 0, columnspan = 3)

Answer 1

您的窗口尚未由几何管理器管理，因此winfo_width()和winfo_height()将返回1.如果您在window.update_idletasks()之前添加h = self.window.winfo_height()，那么问题就解决了。像这样：

window.state("zoomed")
window.update_idletasks()
h = self.window.winfo_height()

Answer 2

而不是使用有点复杂的place，如何使用pack？据我所知，这就是你想要的：

self.FrameLogOn = Frame(window, bg = "PaleTurquoise1")
self.FrameLogOn.pack(expand=True)

只需替换

h = self.window.winfo_height()
w = self.window.winfo_width()

Center_h = h/2
Center_w = w/2
self.FrameLogOn.place(x = Center_w , y = Center_h, anchor = "center")

self.FrameLogOn.pack(expand=True)。

expand=True选项会将内框保留在窗口的中心。

Answer 3

place可让您使用相对坐标。 relx=.5, rely=.5, anchor="center"将小部件完全放在其主控中间。

Tkinter屏幕不居中

3 个答案: