Python 在框架中的位置

Question

我一直在尝试在 python 中使用 Tkinter 创建一个“骰子模拟器”，但是当我尝试将“文本”小部件放置在其框架内时，它保持固定在框架的左上角。我尝试过网格、移动和放置功能，但都不起作用。这是我的代码：

from tkinter import *
from random import *
def roll():
    txt.delete(0.0, END)
    txt.insert(END, str(randint(1,6)))
window = Tk()
window.title('Dice simulator')
canvas = Canvas(window, width=800, height=500, bg='brown')
canvas.pack()
dice = canvas.create_rectangle(375, 225, 425, 275, fill='white')
frame = Frame(canvas, width=25, height=15)
window = canvas.create_window(400, 295, window=frame)
txtframe = Frame(canvas, width=50, height=50)
txtwindow = canvas.create_window(400, 250, window=txtframe, width=49, height=49)
txt = Text(txtframe, font=50)                                                                                                                                         
button = Button(frame, text='Roll', command=roll)
button.pack()
txt.pack()

您有什么建议？帮助将不胜感激。

上面给出的详细信息，在这个网站上并不令人惊奇。刚刚开始。

Answer 1

可以使用包参数

expand

和

fill

:

使内容在框架中居中

widget.pack(expand=True, fill='both')

要防止框架根据内容调整其大小，您可以使用

pack_propatage

方法。

widget.pack_propagate(False)

我使用

Label

而不是

Text

小部件重写了您的代码，并重新排列了它以获得更好的可读性：

from tkinter import *
from random import *

def roll():
    dice_txt.config(text=str(randint(1,6)))

window = Tk()
window.title('Dice simulator')
canvas = Canvas(window, width=800, height=500, bg='brown')
canvas.pack()

# Dice
dice = canvas.create_rectangle(375, 225, 425, 275, fill='white')
txtframe = Frame(canvas, width=50, height=50)
# Keep txtframe from changing size when dice_txt does
txtframe.pack_propagate(False)
dice_txt = Label(txtframe, font=50)
# Put the dice_text in te center of txtframe
dice_txt.pack(expand=True, fill='both')
txtwindow = canvas.create_window(400, 250, window=txtframe, width=49, height=49)

# Roll button
frame = Frame(canvas, width=25, height=15)
window = canvas.create_window(400, 295, window=frame)
button = Button(frame, text='Roll', command=roll)
button.pack()

Answer 2

对于简单的骰子模拟器，您不需要那些框架和文本小部件，只需使用

.create_text()

来显示生成的骰子数字：

import random
import tkinter as tk

def roll():
    canvas.itemconfig(dice, text=random.randint(1, 6))

window = tk.Tk()
window.title("Dice Simulator")
canvas = tk.Canvas(window, width=800, height=500, bg="brown")
canvas.pack()
canvas.create_rectangle(375, 225, 425, 275, fill="white")
dice = canvas.create_text(400, 250, font=('', 40))
button = tk.Button(canvas, text="Roll", width=5, command=roll)
canvas.create_window(400, 295, window=button)
window.mainloop()

结果：