Tkinter Text组件实现撤销与重做功能详解

import tkinter as tk
from tkinter import messagebox, Text, Scrollbar, RIGHT, Y, BOTH

class MasterPanel:
    def __init__(self):
        self.ventana = tk.Tk()
        self.ventana.title('Master panel')
        self.ventana.geometry("800x600") # 示例尺寸
        self.ventana.config(bg='#e8cebd')

        # 创建主框架
        main_frame = tk.Frame(self.ventana)
        main_frame.pack(fill='both', expand=True)

        # 创建右侧用于显示和编辑文档的框架
        self.frame_derecho = tk.Frame(main_frame, bg='lightgrey')
        self.frame_derecho.pack(side='right', fill='both', expand=True)

        # 初始化Text组件（示例，实际应用中可能在其他方法中创建）
        self.text_documento = None 

        self.crear_barra_herramientas()

        # 假设这里加载了一个初始文档
        self.mostrar_docx_en_frame("这是一个示例文档内容。\n你可以尝试编辑它来测试撤销和重做功能。")

        self.ventana.mainloop()

    def crear_barra_herramientas(self):
        barra_menus = tk.Menu(self.ventana)
        self.ventana.config(menu=barra_menus)

        # 创建“编辑”菜单
        menu_edicion = tk.Menu(barra_menus, tearoff=0)
        menu_edicion.add_command(label="撤销", command=self.undo_action, accelerator="Ctrl+Z")
        menu_edicion.add_command(label="重做", command=self.redo_action, accelerator="Ctrl+Y")
        barra_menus.add_cascade(menu=menu_edicion, label="编辑")

        # 全局绑定快捷键，确保在任何地方都能触发
        self.ventana.bind_all("<Control-z>", self.undo_action)
        self.ventana.bind_all("<Control-y>", self.redo_action)

    def mostrar_docx_en_frame(self, contenido_docx):
        # 清理右侧框架
        for widget in self.frame_derecho.winfo_children():
            widget.destroy()

        # 创建Text组件，并启用undo功能
        self.text_documento = Text(self.frame_derecho, wrap='word', undo=True) # 关键：undo=True
        self.text_documento.insert('1.0', contenido_docx)
        self.text_documento.pack(fill=BOTH, expand=True)

        # 配置滚动条
        scrollbar = Scrollbar(self.text_documento)
        scrollbar.pack(side=RIGHT, fill=Y)
        scrollbar.config(command=self.text_documento.yview)
        self.text_documento.config(yscrollcommand=scrollbar.set)

        # 绑定Text组件自身的快捷键，优先级高于全局绑定
        self.text_documento.bind("<Control-z>", self.undo_action)
        self.text_documento.bind("<Control-y>", self.redo_action)

    def undo_action(self, event=None):
        if self.text_documento: # 确保Text组件已创建
            try:
                self.text_documento.edit_undo()
            except tk.TclError:
                messagebox.showinfo("无法撤销", "没有可撤销的操作。")

    def redo_action(self, event=None):
        if self.text_documento: # 确保Text组件已创建
            try:
                self.text_documento.edit_redo()
            except tk.TclError:
                messagebox.showinfo("无法重做", "没有可重做的操作。")

if __name__ == "__main__":
    app = MasterPanel()

self.text_documento = Text(self.frame_derecho, wrap='word', undo=True)

    def undo_action(self, event=None):
        if self.text_documento:
            try:
                self.text_documento.edit_undo()
            except tk.TclError:
                messagebox.showinfo("无法撤销", "没有可撤销的操作。")

    def redo_action(self, event=None):
        if self.text_documento:
            try:
                self.text_documento.edit_redo()
            except tk.TclError:
                messagebox.showinfo("无法重做", "没有可重做的操作。")