languages/cpython
languages/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2024-10-18 13:23:50 +00:00
Code Issues Packages Projects Releases Wiki Activity

Changes inspired by Randall Hooper to allow callbacks when an

Browse source 
OptionMenu is modified.  Somewhat rewritten and elaborated by myself.

class _setit: The constructor now takes an optional argument
`callback' and stashes this in a private variable.  If set, the
__call__() method will invoke this callback after the variable's value
has changed.  It will pass the callback the value, followed by any
args passed to __call__().

class OptionMenu: The constructor now takes keyword arguments, the
only one that's legally recognized is `command', which can be set to a
callback.  This callback is invoked when the OptionMenu value is set.
Any other keyword argument throws a TclError.
This commit is contained in:
Barry Warsaw 2000-02-25 21:54:19 +00:00
parent 02a1c40051
commit 7d3f27c090
1 changed files with 15 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
Lib/lib-tk/Tkinter.py
View file

@ -1790,14 +1790,17 @@ def yview_pickplace(self, *what):
self.tk.call((self._w, 'yview', '-pickplace') + what)
class _setit:
def __init__(self, var, value):
def __init__(self, var, value, callback=None):
self.__value = value
self.__var = var
self.__callback = callback
def __call__(self, *args):
self.__var.set(self.__value)
if self.__callback:
apply(self.__callback, (self.__value,)+args)
class OptionMenu(Menubutton):
def __init__(self, master, variable, value, *values):
def __init__(self, master, variable, value, *values, **kwargs):
kw = {"borderwidth": 2, "textvariable": variable,
"indicatoron": 1, "relief": RAISED, "anchor": "c",
"highlightthickness": 2}
@ -1805,9 +1808,17 @@ def __init__(self, master, variable, value, *values):
self.widgetName = 'tk_optionMenu'
menu = self.__menu = Menu(self, name="menu", tearoff=0)
self.menuname = menu._w
menu.add_command(label=value, command=_setit(variable, value))
# 'command' is the only supported keyword
callback = kwargs.get('command')
if kwargs.has_key('command')
del kwargs['command']
if kwargs:
raise TclError, 'unknown option -'+kwargs.keys()[0]
menu.add_command(label=value,
command=_setit(variable, value, callback))
for v in values:
menu.add_command(label=v, command=_setit(variable, v))
menu.add_command(label=v,
command=_setit(variable, v, callback))
self["menu"] = menu
def __getitem__(self, name):