Passing User enterd Data across Modules

Question

Hi please suggest me some design pattern for the req.....
Its a graphics application where user action like moseClick , mouseDragged events are captured and One Bean Class MouseData is populated.
Now differnt totally differnt components wants to use this real time data.So how should i design so that other modules can use this data on demand but i dont want to couple different modules.
What i am thinking on is that thier is MouseData class and if any other module wants than just req for it

Answer 1

First, if you haven't read the GoF Design Patterns book I suggest picking up a copy at a library or bookstore. This is the defacto foundation for OO design.
There are quite a few approaches you could take. Here are two:
The first is the one you have mentioned where you pass the mouse data class to each of the mouse data clients. You can always make your MouseData class an interface. This isn't terrible way to approach this but it's not my favorite. It depends on the situation. The problem with this is that some third party class generally needs to provide the appropiate MouseData instance to each client. This is often inelegant but sometimes it's perfect. Depends on how these clients are interrelated. When want to add a new client, you'll have to again provide the MouseData instance.
The other way I would recommend is to create a Factory class for the MouseData. The Factory class will have a method on it that provides MouseData instances. When you create a client, you call the Factory and get the MouseData instance. This way new clients have less ripple effect on the rest of the code. There are many ways to create Factory methods. One approach is the Abstract Factory approach. You could even make the MouseData class have a static factory method on it. It can't be an interface in that case, but you can make it abstract.