My own Event

[never]

Hi all,
I try to find some eample with creating Java event but i found only with aplet and it is nothing what i need. so ;o)
I have some "class MyClass" and here is some "myMethod(Object o)". From time to time myMethod(Object o) is invoking and in this time when Object o income into myMethod I would like to invoke some MyEvent and on other side in some class will be listen myListener.PLEASE,can somebody to help me write "MyEvent" and "MyListener".

THX a lot

NeVeR

 

[haslo]

Try to have a Vector or ArrayList called listeners or something in the notifier class (the one that's to cast events). Then add a function like the following to it:

register(Listener listener)
{
listeners.add(listener);
}

With Listener being an interface that defines as follows:

interface Listener
{
void notify(MyEvent event);
}

Then the MyEvent class can be pretty basic, containing maybe a private caller variable and one that's for the message the caller wants to deliver. This class will maybe not be more than 20 lines long.

You then can implement a casting method in the notifier, like the following:

public void cast(MyEvent event)
{
for (int i = 0; i < listeners.size(); i++)
{
((Listener)listeners.get(i)).notify(event);
}
}

The notify function will then be the one listening for the actions.

You can also implement the Listener implementation in a class as inner class, making a more real action listener out of it

There is also an interface collection in the API, that defines pretty much the same thing. I don't remember the name though :-(

Hope this helps

allow thyself to be the spark that lights the fire
haslo@haslo.ch - www.haslo.ch​