如何移除 Canvas 小部件周围的浅灰色边框? [英] How do I remove the light grey border around my Canvas widget?

问题描述

我一直在使用 Tkinter Canvas 小部件以查看是否可以制作一些美观的小部件，我有几个问题.

I've been messing with the Tkinter Canvas widget in order to see if I could make some aesthetically pleasing widgets, and I have a few questions.

首先，为什么我的 Canvas 小部件周围有一个浅灰色边框，我该如何去掉它?

First, why is there a light grey border around my Canvas widget, and how do I get rid of it?

其次，为什么 Canvas 中最左上角的位置 (2,2)?看起来应该是 (0,0).

Secondly, why is the top left most position in the Canvas (2,2)? It seems like it should be (0,0).

我当前的脚本:

from Tkinter import *

master = Tk()
master.configure(bg='black')
master.wm_attributes("-topmost", 1)

w = Canvas(master, width=150, height=40, bd=0,relief='ridge',)
w.pack()

color = 100
x0 = 2
y0 = 2
x1 = 151
y1 = 2

while y0 < 20 :
    r = color
    g = color
    b = color
    rgb = r, g, b
    Hex = '#%02x%02x%02x' % rgb
    w.create_line(x0, y0, x1, y1,fill=str(Hex), width=1)
    color = color - 2
    y0 = y0 + 1
    y1 = y1 + 1

color = 10

while y0 < 40 :
    r = color
    g = color
    b = color
    rgb = r, g, b
    Hex = '#%02x%02x%02x' % rgb
    w.create_line(x0, y0, x1, y1,fill=str(Hex), width=1)
    color = color + 4
    y0 = y0 + 1
    y1 = y1 + 1

mainloop()

推荐答案

第 6.8 节 为什么画布似乎不是从 0,0 开始? Tk 使用常见问题解答 描述了这种现象.

我能够通过对发布的源进行轻微更改来消除边框伪影...

I was able to eliminate the border artefact with slight changes to the posted source...

改变这个:

w = Canvas(master, width=150, height=40, bd=0, relief='ridge')
w.pack()

到:

w = Canvas(master, width=150, height=40, bd=0, highlightthickness=0, relief='ridge')
w.pack()

还有这个:

x0 = 2
y0 = 2
x1 = 151
y1 = 2

到:

x0 = 0
y0 = 0
x1 = 150
y1 = 0

有趣的是，"borderwidth" 属性没有任何区别，但我根据 FAQ 保留了它.

Interestingly enough, the "borderwidth" attribute did not make a difference, but I left it in per the FAQ.

在 Canvas 初始化语句之后立即运行 w.config() 显示 highlightthickness 的默认值为 2> 和 0 表示边框宽度.

Running w.config() immediately after the Canvas initialization statement showed the defaults to be 2 for highlightthickness and 0 for border width.

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