tkinter 中不可删除的文本

发布于 2024-12-08 23:45:31 字数 738 浏览 0 评论 0 原文

这是一些代码：

from Tkinter import *

class Main(object):

    def __init__(self):
        self.console = Text(root, relief='groove', cursor='arrow', spacing1=3)
        self.console.insert(INSERT, '>>> ')
        self.console.focus_set()
        self.scroll = Scrollbar(root, cursor='arrow', command=self.console.yview)
        self.console.configure(yscrollcommand=self.scroll.set)

        self.scroll.pack(fill='y', side='right')
        self.console.pack(expand=True, fill='both')

root = Tk()
root.geometry('%sx%s+%s+%s' %(660, 400, 40, 40))
root.option_add('*font', ('Courier', 9, 'bold'))
root.resizable(0, 1)
app = Main()
root.mainloop()

有没有办法使 '>>> ' 变得不可移除（例如在 IDLE 中）？提前致谢。

原文

here is some code:

from Tkinter import *

class Main(object):

    def __init__(self):
        self.console = Text(root, relief='groove', cursor='arrow', spacing1=3)
        self.console.insert(INSERT, '>>> ')
        self.console.focus_set()
        self.scroll = Scrollbar(root, cursor='arrow', command=self.console.yview)
        self.console.configure(yscrollcommand=self.scroll.set)

        self.scroll.pack(fill='y', side='right')
        self.console.pack(expand=True, fill='both')

root = Tk()
root.geometry('%sx%s+%s+%s' %(660, 400, 40, 40))
root.option_add('*font', ('Courier', 9, 'bold'))
root.resizable(0, 1)
app = Main()
root.mainloop()

is there some way to make '>>> ' become unremovable(like in IDLE for example)?
thanks in advance.

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独﹏钓一江月 2024-12-15 23:45:31

看一下IDLE的源代码。特别是查看 EditorWindow.py 中的“smart_backspace_event”。 IDLE 将文本小部件上的绑定到此函数（间接通过 <> 事件）。

您需要的基本代码如下所示：

chars = console.get("insert linestart", "insert")
# [Do some analysis on "chars" to detect >>> and prevent a backspace]

if DO_BACKSPACE: 
    console.delete("insert-1c", "insert")

# "break" is important so that the Text widget's backspace handler doesn't get called
return "break"

Take a look at IDLE's source code. In particular look at 'smart_backspace_event' in EditorWindow.py. IDLE binds <Key-Backspace> on the text widget to this function (indirectly through the <<smart-backspace>> event).

The basic code you'll need follows like this:

chars = console.get("insert linestart", "insert")
# [Do some analysis on "chars" to detect >>> and prevent a backspace]

if DO_BACKSPACE: 
    console.delete("insert-1c", "insert")

# "break" is important so that the Text widget's backspace handler doesn't get called
return "break"

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