Python implements a simple text editor instance based on the Tkinter library

This article mainly introduces Python based on Tkinter Library to implement a simple text editor, example analysis of Python using Tkinter Library to achieve a simple desktop application skills, with a certain reference value, the need for friends can refer to the

This example describes Python's approach to implementing a simple text editor based on the Tkinter library. Share to everyone for your reference. The implementation methods are as follows:

## {{{http://code.activestate.com/recipes/578568/ (r1)
from Tkinter import *
from tkSimpleDialog import askstring
from tkFileDialog import asksaveasfilename
from tkMessageBox import askokcancel
class Quitter (Frame):
  def __init __ (self, parent = None):
    Frame .__ init __ (self, parent)
    self.pack ()
    widget = Button (self, text = 'Quit', command = self.quit)
    widget.pack (expand = YES, fill = BOTH, side = LEFT)
  def quit (self):
    ans = askokcancel ('Verify exit', "Really quit?")
    if ans: Frame.quit (self)
class ScrolledText (Frame):
  def __init __ (self, parent = None, text = '', file = None):
    Frame .__ init __ (self, parent)
    self.pack (expand = YES, fill = BOTH)
    self.makewidgets ()
    self.settext (text, file)
  def makewidgets (self):
    sbar = Scrollbar (self)
    text = Text (self, relief = SUNKEN)
    sbar.config (command = text.yview)
    text.config (yscrollcommand = sbar.set)
    sbar.pack (side = RIGHT, fill = Y)
    text.pack (side = LEFT, expand = YES, fill = BOTH)
    self.text = text
  def settext (self, text = '', file = None):
    if file:
      text = open (file, 'r'). read ()
    self.text.delete ('1.0', END)
    self.text.insert ('1.0', text)
    self.text.mark_set (INSERT, '1.0')
    self.text.focus ()
  def gettext (self):
    return self.text.get ('1.0', END + '-1c')
class SimpleEditor (ScrolledText):
  def __init __ (self, parent = None, file = None):
    frm = Frame (parent)
    frm.pack (fill = X)
    Button (frm, text = 'Save', command = self.onSave) .pack (side = LEFT)
    Button (frm, text = 'Cut', command = self.onCut) .pack (side = LEFT)
    Button (frm, text = 'Paste', command = self.onPaste) .pack (side = LEFT)
    Button (frm, text = 'Find', command = self.onFind) .pack (side = LEFT)
    Quitter (frm) .pack (side = LEFT)
    ScrolledText .__ init __ (self, parent, file = file)
    self.text.config (font = ('courier', 9, 'normal'))
  def onSave (self):
    filename = asksaveasfilename ()
    if filename:
      alltext = self.gettext ()
      open (filename, 'w'). write (alltext)
  def onCut (self):
    text = self.text.get (SEL_FIRST, SEL_LAST)
    self.text.delete (SEL_FIRST, SEL_LAST)
    self.clipboard_clear ()
    self.clipboard_append (text)
  def onPaste (self):
    try:
      text = self.selection_get (selection = 'CLIPBOARD')
      self.text.insert (INSERT, text)
    except TclError:
      pass
  def onFind (self):
    target = askstring ('SimpleEditor', 'Search String?')
    if target:
      where = self.text.search (target, INSERT, END)
      if where:
        print where
        pastit = where + ('+% dc'% len (target))
        # self.text.tag_remove (SEL, '1.0', END)
        self.text.tag_add (SEL, where, pastit)
        self.text.mark_set (INSERT, pastit)
        self.text.see (INSERT)
        self.text.focus ()
if __name__ == '__main__':
  try:
    SimpleEditor (file = sys.argv [1]). Mainloop ()
  except IndexError:
    SimpleEditor (). Mainloop ()

I hope this article will help you with your Python programming.