Python 如何将 Tkinter 小部件居中？
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How to center a Tkinter widget?
提问by Kriattiffer
I have Tkinter window with canvasand labelwith 200x200 picture on it.
I want labelto be in the center of the window, regardless of the window size.
我有Tkinter的窗口，canvas并label用200x200的图片就可以了。label无论窗口大小如何，我都想在窗口的中央。
from Tkinter import *
import Image, ImageTk, ImageDraw
imgsize = (200,200)
canvas_bg = "#000000"
root = Tk()
## root.geometry("350x350")
panel = PanedWindow()
panel.pack(expand=0)
canvas = Canvas(panel, bg=canvas_bg)
blank_source = Image.new('RGBA',imgsize, "#ffffff")
blank = ImageTk.PhotoImage(blank_source)
label = Label(canvas, image=blank)
label.configure(image = blank)
canvas.pack( expand=0)
mainloop()
Is there any way to do it?
有什么办法吗？
采纳答案by Pierre Monico
Use the placegeometry manager. Here is a simple example :
使用place几何管理器。这是一个简单的例子：
from tkinter import *
wd = Tk()
wd.config(height=500, width=500)
can = Canvas(wd, bg = 'red', height=100, width=100)
can.place(relx=0.5, rely=0.5, anchor=CENTER)
Basically the options work as follows:
基本上这些选项的工作方式如下：
With anchoryou specify which point of the widget you are referring to and with the two others you specify the location of that point. Just for example and to get a better understanding of it, let's say you'd be sure that the window is always 500*500 and the widget 100*100, then you could also write (it's stupid to write it that way but just for the sake of explanation) :
随着anchor你指定你指的是与另外两个小部件的这点您可以指定点的位置。举个例子，为了更好地理解它，假设你确定窗口总是 500*500，小部件总是 100*100，那么你也可以写（那样写是愚蠢的，但只是为了为了解释）：
from tkinter import *
wd = Tk()
wd.config(height=500, width=500)
can = Canvas(wd, bg = 'red', height=100, width=100)
can.place(x=200, y=200, anchor=NW)
relxand relygive a position relative to the window (from 0 to 1) : 0,4*500 = 200xand ygive absolute positions : 200anchor=NWmakes the offset options refer to the upper left corner of the widget
relx并rely给出相对于窗口的位置（从 0 到 1）：0,4*500 = 200x并y给出绝对位置：200anchor=NW使偏移选项指向小部件的左上角
You can find out more over here :
您可以在此处了解更多信息：
http://effbot.org/tkinterbook/place.htm
http://effbot.org/tkinterbook/place.htm
And over here :
在这里：
