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import os
import tkFileDialog
import tkMessageBox
class IOBinding:
# Calls to non-standard text methods:
# reset_undo()
# set_saved(1)
def __init__(self, text):
self.text = text
self.text.bind("<<open-window-from-file>>", self.open)
self.text.bind("<<save-window>>", self.save)
self.text.bind("<<save-window-as-file>>", self.save_as)
self.text.bind("<<save-copy-of-window-as-file>>", self.save_a_copy)
filename_change_hook = None
def set_filename_change_hook(self, hook):
self.filename_change_hook = hook
filename = None
def set_filename(self, filename):
self.filename = filename
self.text.set_saved(1)
if self.filename_change_hook:
self.filename_change_hook()
def open(self, event):
if not self.text.get_saved():
reply = self.maybesave()
if reply == "cancel":
return "break"
filename = self.askopenfile()
if filename:
self.loadfile(filename)
return "break"
def loadfile(self, filename):
try:
f = open(filename)
chars = f.read()
f.close()
except IOError, msg:
tkMessageBox.showerror("I/O Error", str(msg), master=self.text)
return 0
self.text.delete("1.0", "end")
self.set_filename(None)
self.text.insert("1.0", chars)
self.text.reset_undo()
self.set_filename(filename)
self.text.mark_set("insert", "1.0")
self.text.see("insert")
return 1
def maybesave(self):
if self.text.get_saved():
return "yes"
message = "Do you want to save %s before closing?" % (
self.filename or "this untitled document")
m = tkMessageBox.Message(
title="Save On Close",
message=message,
icon=tkMessageBox.QUESTION,
type=tkMessageBox.YESNOCANCEL,
master=self.text)
reply = m.show()
if reply == "yes":
self.save(None)
if not self.text.get_saved():
reply = "cancel"
return reply
def save(self, event):
if not self.filename:
self.save_as(event)
else:
if self.writefile(self.filename):
self.text.set_saved(1)
return "break"
def save_as(self, event):
filename = self.asksavefile()
if filename:
if self.writefile(filename):
self.set_filename(filename)
self.text.set_saved(1)
return "break"
def save_a_copy(self, event):
filename = self.asksavefile()
if filename:
self.writefile(filename)
return "break"
def writefile(self, filename):
try:
f = open(filename, "w")
chars = self.text.get("1.0", "end-1c")
f.write(chars)
if chars and chars[-1] != "\n":
f.write("\n")
f.close()
## print "saved to", `filename`
return 1
except IOError, msg:
tkMessageBox.showerror("I/O Error", str(msg),
master=self.text)
return 0
opendialog = None
savedialog = None
filetypes = [
("Python files", "*.py", "TEXT"),
("All text files", "*", "TEXT"),
("All files", "*"),
]
def askopenfile(self):
dir, base = self.defaultfilename("open")
if not self.opendialog:
self.opendialog = tkFileDialog.Open(master=self.text,
filetypes=self.filetypes)
return self.opendialog.show(initialdir=dir, initialfile=base)
def defaultfilename(self, mode="open"):
if self.filename:
dir, base = os.path.split(self.filename)
else:
dir = base = ""
return dir, base
def asksavefile(self):
dir, base = self.defaultfilename("save")
if not self.savedialog:
self.savedialog = tkFileDialog.SaveAs(master=self.text,
filetypes=self.filetypes)
return self.savedialog.show(initialdir=dir, initialfile=base)
def test():
from Tkinter import *
root = Tk()
class MyText(Text):
def reset_undo(self): pass
def set_saved(self, flag): pass
text = MyText(root)
text.pack()
text.focus_set()
io = IOBinding(text)
root.mainloop()
if __name__ == "__main__":
test()
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