验证 tkinter 文本小部件

Question

我正在 Tkinter 中开发一个简单的文本编辑器。我想在用户输入文本时验证文本小部件，以便可以应用样式。我无法绑定，<KeyPress>因为它在按下按键后更新，并且我无法绑定<KeyRelease>，因为当用户按住按键时它不会触发事件，而这是它需要的。还有其他办法解决这个问题吗？

这是最小的代码：

import tkinter as tk

class textEditor(tk.Frame):

    def __init__(self, *args, **kwargs):

        tk.Frame.__init__(self, *args, **kwargs)

        self.textFrm = tk.Frame(self)

        self.textFrm.pack(fill = "x")

        self.text = tk.Text(self.textFrm, relief = "flat", font = ("Arial","11"))

        self.text.pack(fill = "both", expand = True)

        self.text.bind("<KeyRelease>",lambda event: self.keyPress())

        self.text.focus()

    def keyPress(self):

        #This is not called when a key is held down

        print(self.text.get("end-2c","end-1c"))

root = tk.Tk()

root.title("Text editor test")

t = textEditor(root)

t.pack()

root.mainloop()

Answer 1

我可以通过简单地将<KeyRelease>和绑定<KeyPress>到tk.Text小部件来实现它。（虽然我按照bindings指定的相同顺序进行了操作，但我认为这不会产生影响）。现在我不能说这是一个好的解决方案还是一个好的实践，但它确实有效。import tkinter as tkclass textEditor(tk.Frame):&nbsp; &nbsp; def __init__(self, *args, **kwargs):&nbsp; &nbsp; &nbsp; &nbsp; tk.Frame.__init__(self, *args, **kwargs)&nbsp; &nbsp; &nbsp; &nbsp; self.textFrm = tk.Frame(self)&nbsp; &nbsp; &nbsp; &nbsp; self.textFrm.pack(fill = "x")&nbsp; &nbsp; &nbsp; &nbsp; self.text = tk.Text(self.textFrm, relief = "flat", font = ("Arial","11"))&nbsp; &nbsp; &nbsp; &nbsp; self.text.pack(fill = "both", expand = True)&nbsp; &nbsp; &nbsp; &nbsp; self.text.bind("<KeyRelease>",lambda event: self.keyPress())&nbsp; &nbsp; &nbsp; &nbsp; self.text.bind("<KeyPress>",lambda event: self.keyPress())&nbsp; &nbsp; &nbsp; &nbsp; self.text.focus()&nbsp; &nbsp; &nbsp; &nbsp;&nbsp;&nbsp; &nbsp; def keyPress(self):&nbsp; &nbsp; &nbsp; &nbsp; print(self.text.get("end-2c","end-1c"))root = tk.Tk()root.title("Text editor test")t = textEditor(root)t.pack()root.mainloop()