Tkinter - 将文本插入画布窗口 [英] Tkinter - Inserting text into canvas windows

问题描述

我有一个 Tkinter 画布，其中填充了使用 create_text 和 create_window 方法创建的文本和画布窗口或小部件.我放置在画布上的小部件是文本小部件，我想在创建和放置它们后将文本插入其中.如果可能的话，我无法弄清楚如何做到这一点.我意识到您可以在使用 canvas.itemconfig(tagOrId, cnf) 创建后编辑它们，但不能以这种方式插入文本.有没有办法解决这个问题?

I have a Tkinter canvas populated with text and canvas windows, or widgets, created using the create_text and create_window methods. The widgets I place on the canvas are text widgets, and I want to insert text into them after they are created and placed. I can't figure out how to do this, if it's even possible. I realise you can edit them after creation using canvas.itemconfig(tagOrId, cnf), but text can't be inserted that way. Is there a solution to this?

推荐答案

首先，让我们弄清楚术语:您不是在创建小部件，而是在创建画布项目.Tkinter 文本小部件和画布文本项之间存在很大差异.

First, lets get the terminology straight: you aren't creating widgets, you're creating canvas items. There's a big difference between a Tkinter text widget and a canvas text item.

有两种方法可以设置画布文本项的文本.您可以使用 itemconfigure 来设置 textcode> 属性，您可以使用 insert 方法用于在文本项中插入文本的画布.

There are two ways to set the text of a canvas text item. You can use itemconfigure to set the text attribute, and you can use the insert method of the canvas to insert text in the text item.

在以下示例中，文本项将显示字符串这是新文本":

In the following example, the text item will show the string "this is the new text":

import Tkinter as tk

class Example(tk.Frame):
    def __init__(self, *args, **kwargs):
        tk.Frame.__init__(self, *args, **kwargs)
        canvas = tk.Canvas(self, width=800, height=500)
        canvas.pack(side="top", fill="both", expand=True)
        canvas_id = canvas.create_text(10, 10, anchor="nw")

        canvas.itemconfig(canvas_id, text="this is the text")
        canvas.insert(canvas_id, 12, "new ")

if __name__ == "__main__":
    root = tk.Tk()
    Example(root).pack(side="top", fill="both", expand=True)
    root.mainloop()

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