#########################################################
# add common edit tools to scrolled text by inheritance;
# composition (embedding) would work just as well here;
# this is not robust! see PyEdit for a feature superset;
#########################################################

from Tkinter import * 
from tkSimpleDialog import askstring
from tkFileDialog   import asksaveasfilename
from quitter        import Quitter
from scrolledtext   import ScrolledText                   # here, not Python's

class SimpleEditor(ScrolledText):                         # see PyEdit for more
    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()                      # first through last
            open(filename, 'w').write(alltext)            # store text in file
    def onCut(self):
        text = self.text.get(SEL_FIRST, SEL_LAST)         # error if no select
        self.text.delete(SEL_FIRST, SEL_LAST)             # should wrap in try
        self.clipboard_clear()              
        self.clipboard_append(text)
    def onPaste(self):                                     # add clipboard text
        try:
            text = self.selection_get(selection='CLIPBOARD')
            self.text.insert(INSERT, text)
        except TclError:
            pass                                           # not to be pasted
    def onFind(self):
        target = askstring('SimpleEditor', 'Search String?')
        if target:
            where = self.text.search(target, INSERT, END)  # from insert cursor
            if where:                                      # returns an index
                print where
                pastit = where + ('+%dc' % len(target))    # index past target
               #self.text.tag_remove(SEL, '1.0', END)      # remove selection
                self.text.tag_add(SEL, where, pastit)      # select found target
                self.text.mark_set(INSERT, pastit)         # set insert mark
                self.text.see(INSERT)                      # scroll display
                self.text.focus()                          # select text widget

if __name__ == '__main__':
    try:
        SimpleEditor(file=sys.argv[1]).mainloop()    # filename on command line
    except IndexError:
        SimpleEditor().mainloop()                    # or not