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

The example in this paper describes how Python implements a simple text editor based on the Tkinter library. Share to everyone for your reference. The implementation method is as follows:

# # {{http://code.activestate.com/recipes/578568/(r1) from Tkinter Import * from Tksimpledialog import Askstringfrom TkF Iledialog Import asksaveasfilenamefrom tkmessagebox Import Askokcancel class Quitter (Frame): Def __init_ _ (Self, Parent=none): frame.__init__ (self, parent) self.pack () widget = Button (self, text= ' Quit ', command=se Lf.quit) Widget.pack (Expand=yes, Fill=both, Side=left) def quit (self): ans = askokcancel (' Verify exit ', "really qui    T? ") 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 MAKEWIDG ETS (self): Sbar = Scrollbar (self) Text = text (self, relief=sunken) sbar.config (Command=text.yview) te Xt.config (Yscrollcommand=sbar.set) sbar.pack (Side=right, fill=y) text.pack (Side=left, Expand=YES, fi Ll=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 Simpleedit    or (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 (fo Nt= (' Courier ', 9, ' normal ')) def onSave (self): filename = asksaveasfilename () If Filename:alltext = Self.gett Ext () 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 Tclerro    R: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, W Here, Pastit) self.text.mark_set (INSERT, Pastit) self.text.see (insert) self.text.fo Cus () if __name__ = = ' __main__ ': Try:simpleeditor (File=sys.argv[1]). Mainloop () except Indexerror:si Mpleeditor (). Mainloop ()

Hopefully this article will help you with Python programming.

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