窗口中框架中的标签不会拉伸，为什么? [英] A Label in a Frame in a window won't stretch, why?

问题描述

我想展示

• 一个窗口
• 使用单个 Frame
• 和 Frame 中的 Label 将拉伸到窗口的整个宽度

• a window
• with a single Frame
• and a Label in the Frame which would stretch to the whole width of the window

以下代码

import Tkinter as tk

root = tk.Tk()
root.geometry("100x100")
# first column of root will stretch
root.columnconfigure(0, weight=1)

# a frame in root
upper_frame = tk.Frame(root)
# first column of upper_frame will stretch
upper_frame.columnconfigure(0, weight=1)
upper_frame.grid(row=0, column=0)

# a label in upper_frame, which should stretch
mylabel = tk.Label(upper_frame)
mylabel.grid(row=0, column=0)
mylabel.configure(text="hello", background="blue")

root.mainloop()

显示

为什么 Label 没有拉伸到窗口的整个宽度，而是和文本一样宽?

Why isn't the Label stretching to the whole width of the window but is just as wide as the text?

推荐答案

在调用 grid(e = 东，w = 西).否则单元格中的小部件居中对齐.

Specifying sticky option when you call grid (e = east, w = west). Otherwise the widget in the cell is center-aligned.

upper_frame.grid(row=0, column=0, sticky='ew')
..
mylabel.grid(row=0, column=0, sticky='ew')

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