Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / v8plus / lib / python2.4 / idlelib / WidgetRedirector.py

from Tkinter import *


class WidgetRedirector:

   """Support for redirecting arbitrary widget subcommands."""

   def __init__(self, widget):
       self.dict = {}
       self.widget = widget
       self.tk = tk = widget.tk
       w = widget._w
       self.orig = w + "_orig"
       tk.call("rename", w, self.orig)
       tk.createcommand(w, self.dispatch)

   def __repr__(self):
       return "WidgetRedirector(%s<%s>)" % (self.widget.__class__.__name__,
                                            self.widget._w)

   def close(self):
       for name in self.dict.keys():
           self.unregister(name)
       widget = self.widget; del self.widget
       orig = self.orig; del self.orig
       tk = widget.tk
       w = widget._w
       tk.deletecommand(w)
       tk.call("rename", orig, w)

   def register(self, name, function):
       if self.dict.has_key(name):
           previous = dict[name]
       else:
           previous = OriginalCommand(self, name)
       self.dict[name] = function
       setattr(self.widget, name, function)
       return previous

   def unregister(self, name):
       if self.dict.has_key(name):
           function = self.dict[name]
           del self.dict[name]
           if hasattr(self.widget, name):
               delattr(self.widget, name)
           return function
       else:
           return None

   def dispatch(self, cmd, *args):
       m = self.dict.get(cmd)
       try:
           if m:
               return m(*args)
           else:
               return self.tk.call((self.orig, cmd) + args)
       except TclError:
           return ""


class OriginalCommand:

   def __init__(self, redir, name):
       self.redir = redir
       self.name = name
       self.tk = redir.tk
       self.orig = redir.orig
       self.tk_call = self.tk.call
       self.orig_and_name = (self.orig, self.name)

   def __repr__(self):
       return "OriginalCommand(%r, %r)" % (self.redir, self.name)

   def __call__(self, *args):
       return self.tk_call(self.orig_and_name + args)


def main():
   root = Tk()
   text = Text()
   text.pack()
   text.focus_set()
   redir = WidgetRedirector(text)
   global orig_insert
   def my_insert(*args):
       print "insert", args
       orig_insert(*args)
   orig_insert = redir.register("insert", my_insert)
   root.mainloop()

if __name__ == "__main__":
   main()