python基于Tkinter库实现简单文本编辑器实例

 ## {{{ 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, f<strong style="color:transparent">来源gaodai#ma#com搞@@代~&码*网</strong>ill=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()