Python实现的文本编辑器功能示例

#encoding=utf-8import wximport osclass MyFrame(wx.Frame):  def __init__(self):    self.file=''    self.content=[]    self.count=0    self.width=700    self.height=500    wx.Frame.__init__(self,None,-1,u'记事本',size=(self.width,self.height))    self.panel=wx.Panel(self,-1)    menubar=wx.MenuBar()    menu1=wx.Menu()    menubar.Append(menu1,u'文件')    menu1.Append(1001,u'打开')    menu1.Append(1002,u'保存')    menu1.Append(1003,u'另存为')    menu1.Append(1004,u'退出')    menu2=wx.Menu()    menubar.Append(menu2,u'编辑')    menu2.Append(2001,u'撤销')    menu2.Append(2002,u'清空')    menu2.Append(2003,u'剪切 Ctrl + X')    menu2.Append(2004,u'复制 Ctrl + C')    menu2.Append(2005,u'粘贴 Ctrl + V ')    menu2.Append(2006,u'全选 Ctrl + A',)    menu=wx.Menu()    ctrla=menu.Append(-1, "/tCtrl-A")    ctrlc=menu.Append(-1, "/tCtrl-C")    ctrlx=menu.Append(-1, "/tCtrl-X")    ctrlv=menu.Append(-1, "/tCtrl-V")    ctrls=menu.Append(-1, "/tCtrl-S")    menubar.Append(menu,'')    self.SetMenuBar(menubar)    self.Bind(wx.EVT_MENU, self.OnSelect, ctrla)    self.Bind(wx.EVT_MENU, self.OnCopy,ctrlc)    self.Bind(wx.EVT_MENU, self.OnCut,ctrlc)    self.Bind(wx.EVT_MENU, self.OnPaste,ctrlv)    self.Bind(wx.EVT_MENU, self.OnTSave, ctrls)    self.Bind(wx.EVT_MENU, self.OnOpen, id=1001)    self.Bind(wx.EVT_MENU, self.OnSave, id=1002)    self.Bind(wx.EVT_MENU, self.OnSaveAll, id=1003)    self.Bind(wx.EVT_MENU, self.OnExit, id=1004)    self.Bind(wx.EVT_MENU, self.OnBack, id=2001)    self.Bind(wx.EVT_MENU, self.OnClear, id=2002)    self.Bind(wx.EVT_MENU, self.OnCut, id=2003)    self.Bind(wx.EVT_MENU, self.OnCopy, id=2004)    self.Bind(wx.EVT_MENU, self.OnPaste, id=2005)    self.Bind(wx.EVT_MENU, self.OnSelect, id=2006)    self.Bind(wx.EVT_SIZE, self.OnResize)    new=wx.Image('./icons/new.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    open=wx.Image('./icons/open.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    exit=wx.Image('./icons/exit.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    save=wx.Image('./icons/save.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    saveall=wx.Image('./icons/saveall.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    back=wx.Image('./icons/back.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    go=wx.Image('./icons/go.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    clear=wx.Image('./icons/clear.png',wx.BITMAP_TYPE_PNG).ConvertToBitmap()    toolbar=self.CreateToolBar(wx.TB_HORIZONTAL|wx.TB_TEXT)    toolbar.AddSimpleTool(100,new,'New')    toolbar.AddSimpleTool(200,open,'Open')    toolbar.AddSimpleTool(300,exit,'Exit')    toolbar.AddSimpleTool(400,save,'Save')    toolbar.AddSimpleTool(500,saveall,'Save All')    toolbar.AddSimpleTool(600,back,'Back')    toolbar.AddSimpleTool(700,go,'Go')    toolbar.AddSimpleTool(800,clear,'Clear')    toolbar.Realize()    self.Bind(wx.EVT_TOOL,self.OnTOpen,id=200)    self.Bind(wx.EVT_TOOL,self.OnTExit,id=300)    self.Bind(wx.EVT_TOOL,self.OnTSave,id=400)    self.Bind(wx.EVT_TOOL,self.OnTBack,id=600)    self.Bind(wx.EVT_TOOL,self.OnTGo,id=700)    self.Bind(wx.EVT_TOOL,self.OnTClear,id=800)    self.text=wx.TextCtrl(self.panel,-1,pos=(2,2),size=(self.width-10,self.height-50), style=wx.HSCROLL|wx.TE_MULTILINE)    self.popupmenu = wx.Menu()#创建一个菜单    for text in "Cut Copy Paste SelectAll".split():#填充菜单      item = self.popupmenu.Append(-1, text)      self.Bind(wx.EVT_MENU, self.OnPopupItemSelected, item)      self.panel.Bind(wx.EVT_CONTEXT_MENU, self.OnShowPopup)#绑定一个显示菜单事件  def OnShowPopup(self, event):#弹出显示    pos = event.GetPosition()    pos = self.panel.ScreenToClient(pos)    self.panel.PopupMenu(self.popupmenu, pos)  def OnPopupItemSelected(self, event):    item = self.popupmenu.FindItemById(event.GetId())    text = item.GetText()    if text=='Cut':      self.OnCut(event)    elif text=='Copy':      self.OnCopy(event)    elif text=='Paste':      self.OnPaste(event)    elif text=='SelectAll':      self.OnSelect(event)  def OnOpen(self,event):    filterFile=" All files (*.*) |*.*"    opendialog=wx.FileDialog(self,u"选择文件",os.getcwd(),"",filterFile,wx.OPEN)    if opendialog.ShowModal()==wx.ID_OK:      self.file=opendialog.GetPath()      f=open(self.file)      self.text.write(f.read())      f.close()    opendialog.Destroy()  def OnTOpen(self,event):    filterFile="All files (*.*) |*.*"    opendialog=wx.FileDialog(self,u"选择文件",os.getcwd(),"",filterFile,wx.OPEN)    if opendialog.ShowModal()==wx.ID_OK:      self.file=opendialog.GetPath()      f=open(self.file)      self.text.write(f.read())      f.close()      self.content.append(self.text.GetValue())    opendialog.Destroy()  def OnSave(self,event):    filterFile="All files (*.*) |*.*"    opendialog=wx.FileDialog(self,u'保存文件',os.getcwd(),"",filterFile,wx.SAVE)    if opendialog.ShowModal()==wx.ID_OK:      self.file=opendialog.GetPath()      self.text.SaveFile(self.file)  def OnTSave(self,event):    if self.file == '':      filterFile="All files (*.*) |*.*"      opendialog=wx.FileDialog(self,u'保存文件',os.getcwd(),"",filterFile,wx.SAVE)      if opendialog.ShowModal()==wx.ID_OK:        self.file=opendialog.GetPath()        self.text.SaveFile(self.file)        self.content.append(self.text.GetValue())        self.count=self.count+1    else:      self.text.SaveFile(self.file)      self.content.append(self.text.GetValue())      self.count=self.count+1  def OnSaveAll(self,event):      pass  def OnExit(self,event):    self.Close()  def OnTExit(self,event):    self.Close()  def OnBack(self,event):    self.text.Undo()  def OnTBack(self,event):    try:      self.count=self.count-1      self.text.SetValue(self.content[self.count])    except IndexError:      self.count=0  def OnTGo(self,event):    try:      self.count=self.count+1      self.text.SetValue(self.content[self.count])    except IndexError:      self.count=len(self.content)-1  def OnClear(self,event):    self.text.Clear()  def OnTClear(self,event):    self.text.Clear()  def OnCut(self,event):    self.text.Cut()  def OnCopy(self,event):    self.text.Copy()  def OnPaste(self,event):    self.text.Paste()  def OnSelect(self,event):    self.text.SelectAll()  def OnResize(self,event):    newsize=self.GetSize()    width=newsize.GetWidth()-10    height=newsize.GetHeight()-50    self.text.SetSize((width,height))    self.text.Refresh()if __name__=='__main__':  app=wx.App()  myFrame=MyFrame()  myFrame.Show()  app.MainLoop()