Python Tkinter - 将文本插入画布窗口
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Tkinter - Inserting text into canvas windows
提问by Yngve
I have a Tkinter canvas populated with text and canvas windows, or widgets, created using the create_textand create_windowmethods. 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?
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。我意识到您可以在创建后使用 编辑它们canvas.itemconfig(tagOrId, cnf)，但不能以这种方式插入文本。这个问题有方法解决吗？
采纳答案by Bryan Oakley
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.
首先，让我们明白术语：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。
There are two ways to set the text of a canvas text item. You can use itemconfigureto set the textattribute, and you can use the insertmethod of the canvas to insert text in the text item.
有两种方法可以设置画布文本项的文本。可以使用itemconfigure设置text属性，也可以使用canvas的insert方法在text item中插入文字。
In the following example, the text item will show the string "this is the new text":
在以下示例中，文本项将显示字符串“这是新文本”：
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()
