Tkinter：如何制作圆角文本小部件？

Question

问题

如何创建圆角文本小部件？我想我想创建一个圆形画布并用没有边框的文本框填充整个画布。

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问题

当我尝试扩展画布的高度和宽度时，创建圆形边框画布的代码不起作用。换行并变得不连续。

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创建圆角画布的代码取自How to make a tkinter canvas rectangle with rounded corners?

我的自定义宽度和高度的代码

def rounded_rect(canvas, x, y, w, h, c):
    canvas.create_arc(x,   y,   x+2*c,   y+2*c,   start= 90, extent=90, style="arc")
    canvas.create_arc(x+w-2*c, y+h-2*c, x+w, y+h, start=270, extent=90, style="arc")
    canvas.create_arc(x+w-2*c, y,   x+w, y+2*c,   start=  0, extent=90, style="arc")
    canvas.create_arc(x,   y+h-2*c, x+2*c,   y+h, start=180, extent=90, style="arc")
    canvas.create_line(x+c, y,   x+w-c, y    )
    canvas.create_line(x+c, y+h, x+w-c, y+h  )
    canvas.create_line(x,   y+c, x,     y+h-c)
    canvas.create_line(x+w, y+c, x+w,   y+h-c)

import tkinter
root = tkinter.Tk()
canvas = tkinter.Canvas(root)
canvas.grid(row=0,column=0)

# The width and height has been changed from the original solution
rounded_rect(canvas, 10, 10, 330, 290, 10)
root.mainloop()

输出

Answer 1

一种解决方案是使用具有自定义样式的 ttk 框架，该样式使用图像作为角落。

以下示例改编自我在 2007 年写的 tcl/tk 解决方案。它使用奇怪的颜色作为焦点，并且需要白色背景，但您可以创建自己的图像来替换此解决方案中使用的图像（或在本例中编辑图像¹）

# adapted from http://wiki.tcl.tk/%0920152
import tkinter as tk
from tkinter import ttk

focusBorderImageData = '''
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    AACQDADjAAASAAAAAACAAADVABZBAAB+ALjMwOIEhxINUAAAANIgAOYAAIEA
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    Ry/99NIz//oGrZpUUEAAOw==
'''

borderImageData = '''
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    rOzq7JyanNza3Ly6vPz6/ISChMTGxKSmpOTm5JSWlNTW1LS2tPT29IyOjMzO
    zKyurOzu7JyenNze3Ly+vPz+/OkAKOUA5IEAEnwAAACuQACUAAFBAAB+AFYd
    QAC0AABBAAB+AIjMAuEEABINAAAAAHMgAQAAAAAAAAAAAKjSxOIEJBIIpQAA
    sRgBMO4AAJAAAHwCAHAAAAUAAJEAAHwAAP+eEP8CZ/8Aif8AAG0BDAUAAJEA
    AHwAAIXYAOfxAIESAHwAAABAMQAbMBZGMAAAIEggJQMAIAAAAAAAfqgaXESI
    5BdBEgB+AGgALGEAABYAAAAAAACsNwAEAAAMLwAAAH61MQBIAABCM8B+AAAU
    AAAAAAAApQAAsf8Brv8AlP8AQf8Afv8AzP8A1P8AQf8AfgAArAAABAAADAAA
    AACQDADjAAASAAAAAACAAADVABZBAAB+ALjMwOIEhxINUAAAANIgAOYAAIEA
    AHwAAGjSAGEEABYIAAAAAEoBB+MAAIEAAHwCACABAJsAAFAAAAAAAGjJAGGL
    AAFBFgB+AGmIAAAQAABHAAB+APQoAOE/ABIAAAAAAADQAADjAAASAAAAAPiF
    APcrABKDAAB8ABgAGO4AAJAAqXwAAHAAAAUAAJEAAHwAAP8AAP8AAP8AAP8A
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'''

root = tk.Tk()
style = ttk.Style()
borderImage = tk.PhotoImage("borderImage", data=borderImageData)
focusBorderImage = tk.PhotoImage("focusBorderImage", data=focusBorderImageData)

style.element_create("RoundedFrame",
                     "image", borderImage,
                     ("focus", focusBorderImage),
                     border=16, sticky="nsew")
style.layout("RoundedFrame",
             [("RoundedFrame", {"sticky": "nsew"})])

frame1 = ttk.Frame(style="RoundedFrame", padding=10)
text1 = tk.Text(frame1, borderwidth=0, highlightthickness=0, wrap="word",
                width=40, height=4)
text1.pack(fill="both", expand=True)

text1.bind("<FocusIn>", lambda event: frame1.state(["focus"]))
text1.bind("<FocusOut>", lambda event: frame1.state(["!focus"]))
text1.insert("end", "This widget has the focus")

frame2 = ttk.Frame(style="RoundedFrame", padding=10)
text2 = tk.Text(frame2, borderwidth=0, highlightthickness=0, wrap="word",
                width=40, height=4)
text2.pack(fill="both", expand=True)
text2.bind("<FocusIn>", lambda event: frame2.state(["focus"]))
text2.bind("<FocusOut>", lambda event: frame2.state(["!focus"]))
text2.insert("end", "This widget does not have the focus")

root.configure(background="white")
frame1.pack(side="top", fill="both", expand=True, padx=20, pady=20)
frame2.pack(side="top", fill="both", expand=True, padx=20, pady=20)

frame1.focus_set()

root.mainloop()

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¹图片数据是base64编码的gif。如果您对数据进行解码并将其保存为 .gif 文件，则可以对其进行编辑以使用所需的任何颜色。

Answer 2

您的画布根本不够大。使用放大

canvas = tkinter.Canvas(root, width=500, height=500)

或者使用根窗口调整大小

canvas = tkinter.Canvas(root)
canvas.grid(row=0,column=0, sticky='NSEW')
root.rowconfigure(0, weight=1)
root.columnconfigure(0, weight=1)

Answer 3

除了主窗口外，我也遇到了这个问题。我正在为某人制作一个便笺应用程序，他们希望窗口的角是圆角的。

我在 4 个角上有 4 个画布，并带有基于角的弧形图像。然后我将这些图像的颜色设置为透明，效果出奇的好，所以我想分享它。

代码如下：

from tkinter import *
from PIL import Image,ImageTk

def drag(event,win):
    x = win.winfo_pointerx() - win.offsetx
    y = win.winfo_pointery() - win.offsety
    win.geometry('+{x}+{y}'.format(x=x,y=y))

def click(event,win):
    win.offsetx = event.x
    win.offsety = event.y

root = Tk()
root.resizable(False,False)
root.geometry("610x260")
img = ImageTk.PhotoImage( Image.open("src/ARC.png").resize((150,150)), Image.ANTIALIAS )
img2 = ImageTk.PhotoImage( Image.open("src/ARC 2.png").resize((150,150)), Image.ANTIALIAS )
img3 = ImageTk.PhotoImage( Image.open("src/ARC 3.png").resize((150,150)), Image.ANTIALIAS )
img4 = ImageTk.PhotoImage( Image.open("src/ARC 4.png").resize((150,150)), Image.ANTIALIAS )
fr = Frame(root, bg = "yellow", bd = 0)
fr.pack( expand = True, fill = 'both')
canvas = Canvas(fr, bg = "yellow", width = 60, height = 60, bd=0, highlightthickness=0, relief='ridge')
canvas.create_image(-2,-2, image = img, anchor = "nw")
canvas2 = Canvas(fr, bg = "yellow", width = 60, height = 60, bd=0, highlightthickness=0, relief='ridge')
canvas2.create_image(62,-2, image = img2, anchor = "ne")
canvas3 = Canvas(fr, bg = "yellow", width = 60, height = 60, bd=0, highlightthickness=0, relief='ridge')
canvas3.create_image(-2,62, image = img3, anchor = "sw")
canvas4 = Canvas(fr, bg = "yellow", width = 60, height = 60, bd=0, highlightthickness=0, relief='ridge')
canvas4.create_image(62,62, image = img4, anchor = "se")
Grid.columnconfigure(fr, 0, weight = 1)
Grid.columnconfigure(fr, 1, weight = 1)
Grid.rowconfigure(fr, 1, weight = 1)
canvas.grid( row = 0, column = 0, sticky = 'NW' )
canvas2.grid( row = 0, column = 1, sticky = 'NE' )
canvas3.grid(row = 1, column = 0, sticky = 'SW' )
canvas4.grid(row = 1, column = 1, sticky = 'SE' )
root.overrideredirect(True)
root.wm_attributes('-transparentcolor', "#222222")
root.bind('<Button-1>', lambda e, root = root: click(e,root))
root.bind('<B1-Motion>', lambda e, root = root: drag(e,root))
root.mainloop()

现在您可能会根据您在窗口中的需要更改画布的行和列，但这是一个好的开始。