Add trace methods to class Variable
diff --git a/Lib/lib-tk/Tkinter.py b/Lib/lib-tk/Tkinter.py
index fbf90e4..5220c9d 100644
--- a/Lib/lib-tk/Tkinter.py
+++ b/Lib/lib-tk/Tkinter.py
@@ -63,12 +63,11 @@
class Variable:
_default = ""
def __init__(self, master=None):
- global _default_root
global _varnum
- if master:
- self._tk = master.tk
- else:
- self._tk = _default_root.tk
+ if not master:
+ master = _default_root
+ self._master = master
+ self._tk = master.tk
self._name = 'PY_VAR' + `_varnum`
_varnum = _varnum + 1
self.set(self._default)
@@ -78,6 +77,17 @@
return self._name
def set(self, value):
return self._tk.globalsetvar(self._name, value)
+ def trace_variable(self, mode, callback):
+ cbname = self._master._register(callback)
+ self._tk.call("trace", "variable", self._name, mode, cbname)
+ return cbname
+ trace = trace_variable
+ def trace_vdelete(self, mode, cbname):
+ self._tk.call("trace", "vdelete", self._name, mode, cbname)
+ self._tk.deletecommand(cbname)
+ def trace_vinfo(self):
+ return map(self._tk.split, self._tk.splitlist(
+ self._tk.call("trace", "vinfo", self._name)))
class StringVar(Variable):
_default = ""