python-3.x - 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？我想我有一个创建圆形 Canvas 的想法，并用没有边框的文本框填充整个 Canvas 。

问题

当我尝试扩展 Canvas 的高度和宽度时，创建圆形边框 Canvas 的代码不起作用。线断开并变得不连续。

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

我的代码具有自定义宽度和高度

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带有自定义样式的 ttk 框架，该样式将图像用于角落。

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(或编辑本例中的图像1)

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

focusBorderImageData = '''
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    AAAAAAAApQAAsf8Brv8AlP8AQf8Afv8AzP8A1P8AQf8AfgAArAAABAAADAAA
    AACQDADjAAASAAAAAACAAADVABZBAAB+ALjMwOIEhxINUAAAANIgAOYAAIEA
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    Ry/99NIz//oGrZpUUEAAOw==
'''

borderImageData = '''
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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()

1图像数据是base64编码的gif。如果您解码数据并将其保存为 .gif 文件，您可以编辑它以使用您想要的任何颜色。