python通过Tkinter库实现的一个简单的文本编辑器代码

python通过Tkinter库实现的一个简单的文本编辑器代码

## {{{ 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()

#该代码片段来自于: http://www.sharejs.com/codes/python/7818