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Add 'get' method to Variable and switch it from internal class to

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standard class (it is now useful because it doesn't constrain the type
of the value).
This commit is contained in:
Guido van Rossum 2003-04-16 20:10:03 +00:00
parent a4541a30fc
commit 2cd0a65c70
1 changed files with 7 additions and 1 deletions
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8
Lib/lib-tk/Tkinter.py
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@ -163,7 +163,10 @@ def _exit(code='0'):
_varnum = 0
class Variable:
"""Internal class. Base class to define value holders for e.g. buttons."""
"""Class to define value holders for e.g. buttons.
Subclasses StringVar, IntVar, DoubleVar, BooleanVar are specializations
that constrain the type of the value returned from get()."""
_default = ""
def __init__(self, master=None):
"""Construct a variable with an optional MASTER as master widget.
@ -186,6 +189,9 @@ class Variable:
def set(self, value):
"""Set the variable to VALUE."""
return self._tk.globalsetvar(self._name, value)
def get(self):
"""Return value of variable."""
return self._tk.globalgetvar(self._name)
def trace_variable(self, mode, callback):
"""Define a trace callback for the variable.