//事件检查内部方法, 事件触发时机达到后, 检查是否可以真正的告诉各个listener
//如果有子类, 子类应该有是否真正触发事件的选择权
protected virtual void OnEventTrigger(MyEventArg args)
{
//TODO thrading problem
if (myEvent != null)
{
myEvent.Invoke(this, args);
}
}
//事件触发公开方法, 别人调用它代表事件准备触发
public void SomethingHappens(int i, string s)
{
MyEventArg args = new MyEventArg(i, s);
OnEventTrigger(args);
}
//Listener定义如何处理事件
private void EventHandlerOne(Object sender, MyEventArg e)
{
Console.WriteLine("ListenerOne is handling event from " + sender.GetType() +
". Dealing with info of [" + e.IntInfo.ToString() + "] and " + "[" + e.StringInfo + "].");
}
static void TempHandleMany_2(Object sender, MyEventArg e)
{
Console.WriteLine("Handling event 2 of many events class");
}
protected override void OnEventTrigger(MyEventArg args)
{
//子类选择无论如何都不触发事件
return;
}