[udig-devel] First cut of Events done! Please test

[Jody Garnett <jgarnett@xxxxxxxxxxxxxxx>]

You will see I made a StyleComponent to hold the event shunting code, 
this bottoms out
at StyleLayerDescriptor - which actually fires events.

I think the setters should look like this for "simple content" like 
name, title, description:
>     public void setName(String name) {
>         this.name = name;
>         fireChanged();
>     }
For a more complicated thing - that is still in the style package:
>     public void setFill(Fill fill) {
>         if( this.fill == fill ) return;
>         if( this.fill != null ){
>             fireChildRemoved( fill );
>         }
>         this.fill = fill;
>         if( fill != null ){
>             fireChildAdded( fill );
>         }        
>     }
And finally for something like an Expression (that the user interface 
may be in the middle
of editing):
>     public void setRotation(Expression rotation) {
>         this.rotation = rotation;
>         fireChildChanged( rotation );
>     }
>     public void setRotation(double rotation) {
>         setRotation(filterFactory.createLiteralExpression( rotation 
> ));        
>     }
What is left to do? Lists - I placed the fireChilfChanged( child1, 
child2 ) to handle moves, but we really
need to break out a list to intercept edits of this nature. Currently 
the best that can be done is smacking
the entire array for a single "changed" event.

The deltas work as expected, I create a StyleAdapater (abstract 
StyleListener according to Java naming conventions) where we can
put utility code to help people understand the events.

Jody
Jody