def tkVariable(var: Variable, key: str, default=None):
"""
将tkinter的var绑定到缓存
:param var:
:param key:
:param default:
:return:
"""
_cache = cache.get(key, default=None)
if _cache is None:
if default is not None:
var.set(default)
else:
var.set(_cache)
var.trace('w', lambda a, b, c: cache.set(key, var.get()))
class Prop:
def __init__(self, initialValue=None, callback=None):
self._var = Variable(value=initialValue)
if callback is not None:
self._var.trace(mode='w', callback=callback)
def get(self):
return self._var.get()
def set(self, value):
self._var.set(value)
def on_change(self, listener):
def update(*dummy):
listener(self._var.get())
self._var.trace('w', update)
