Python实现文本编辑器功能实例详解

本文实例讲述了Python实现的文本编辑器功能。分享给大家供大家参考，具体如下：

wxpython实现的文本编辑器 效果如下：

主要功能：

1.编辑保存文本，打开修改文本
2.常用快捷键，复制，粘贴，全选等
3.支持撤销功能
4.支持弹出式菜单

代码如下：

#encoding=utf-8
import wx
import os
class 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()

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