bugfix

appPublic/eventproperty.py

@@ -0,0 +1,62 @@
+from eventpy.eventdispatcher import EventDispatcher
+from appPublic.dictObject import DictObject
+
+def bind(self, eventname, handler):
+	self.appendListener(eventname, handler)
+
+def unbind(self, eventname, handler):
+	self.removeListener(eventname, handler);
+
+EventDispatcher.bind = bind
+EventDispatcher.unbind = unbind
+
+class EventProperty:
+	def __init__(self, event_name, initial_value=None):
+		self._value = initial_value
+		self.event_name = event_name
+
+	def __get__(self, instance, owner):
+		return self._value
+
+	def __set__(self, instance, value):
+		if self._value != value:
+			self._value = value
+			d = DictObject()
+			d.target = instance
+			d.data = value
+			d.event = self.event_name
+			instance.dispatch(self.event_name, d)
+
+
+if __name__ == '__main__':
+	class SomeClass(EventDispatcher):
+		state = EventProperty('onstate', 0)
+		age = EventProperty('onage', 20)
+
+		def __init__(self):
+			super().__init__()
+
+	def observer1(data):
+		print(f"Observer 1 received: {data}")
+
+	def observer2(data):
+		print(f"Observer 2 received: {data}")
+
+	def observer3(data):
+		print(f"Observer 3 received: {data}")
+
+	# 创建实例
+	si = SomeClass()
+	# 添加监听
+	si.bind('onstate', observer1)
+	si.bind('onstate', observer2)
+	si.bind('onage', observer3)
+
+	# 改变状态
+	si.state = 10  # 输出: Observer 1 received: 10, Observer 2 received: 10
+	# 再次改变状态
+	# si.unbind('onstate', observer1) unbind has error
+	si.state = 20  # 输出: Observer 2 received: 20
+	# change age's value
+	si.age = 30
+