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import wx

class TextEditor(wx.Frame):
    def __init__(self):
        super().__init__(None, title="简易文本编辑器", size=(800, 600))
        
        # 创建菜单栏
        menubar = wx.MenuBar()
        file_menu = wx.Menu()
        file_menu.Append(wx.ID_NEW, "新建(&N)")
        file_menu.Append(wx.ID_OPEN, "打开(&O)")
        file_menu.Append(wx.ID_SAVE, "保存(&S)")
        file_menu.AppendSeparator()
        file_menu.Append(wx.ID_EXIT, "退出(&Q)")
        menubar.Append(file_menu, "文件(&F)")
        self.SetMenuBar(menubar)
        
        # 绑定菜单事件
        self.Bind(wx.EVT_MENU, self.on_new, id=wx.ID_NEW)
        self.Bind(wx.EVT_MENU, self.on_open, id=wx.ID_OPEN)
        self.Bind(wx.EVT_MENU, self.on_save, id=wx.ID_SAVE)
        self.Bind(wx.EVT_MENU, self.on_exit, id=wx.ID_EXIT)
        
        # 创建文本编辑区域
        self.text_ctrl = wx.TextCtrl(self, style=wx.TE_MULTILINE)
        
        # 设置状态栏
        self.CreateStatusBar()
        self.SetStatusText("就绪")
        
        # 当前文件路径
        self.current_file = ""
        
        self.Show()
    
    def on_new(self, event):
        self.text_ctrl.Clear()
        self.current_file = ""
        self.SetTitle("简易文本编辑器 - 未命名")
        self.SetStatusText("新建文件")
    
    def on_open(self, event):
        with wx.FileDialog(self, "打开文件", wildcard="文本文件 (*.txt)|*.txt", 
                          style=wx.FD_OPEN | wx.FD_FILE_MUST_EXIST) as dlg:
            if dlg.ShowModal() == wx.ID_CANCEL:
                return
            self.current_file = dlg.GetPath()
            try:
                with open(self.current_file, 'r', encoding='utf-8') as f:
                    self.text_ctrl.SetValue(f.read())
                self.SetTitle(f"简易文本编辑器 - {self.current_file}")
                self.SetStatusText(f"已打开: {self.current_file}")
            except Exception as e:
                wx.MessageBox(f"无法打开文件: {str(e)}", "错误", wx.OK | wx.ICON_ERROR)
    
    def on_save(self, event):
        if not self.current_file:
            with wx.FileDialog(self, "保存文件", wildcard="文本文件 (*.txt)|*.txt", 
                              style=wx.FD_SAVE | wx.FD_OVERWRITE_PROMPT) as dlg:
                if dlg.ShowModal() == wx.ID_CANCEL:
                    return
                self.current_file = dlg.GetPath()
        
        try:
            with open(self.current_file, 'w', encoding='utf-8') as f:
                f.write(self.text_ctrl.GetValue())
            self.SetTitle(f"简易文本编辑器 - {self.current_file}")
            self.SetStatusText(f"已保存: {self.current_file}")
        except Exception as e:
            wx.MessageBox(f"无法保存文件: {str(e)}", "错误", wx.OK | wx.ICON_ERROR)
    
    def on_exit(self, event):
        self.Close()

if __name__ == "__main__":
    app = wx.App()
    editor = TextEditor()
    app.MainLoop()