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[news.eclipse.modeling.gmf] Re: How does code generation and custom code co-exist in a normal project?
So in this case the answer is that you don't need to modify the code because GMF lets you configure it in the model. :-P


RefuX wrote: 
OK, that is interesting. I didn't know you could do that :)

My problem:

/**
 * @generated
 */
public class MyEditPart extends ShapedNodeEditPart {
    public class MyFigure extends RectangleFigure {

        /**
         * @generated
         */
        private void createContents() {

class ScalePolyClass extends Shape {
..... lots o code
}
ScalePolyClass sp = new ScalePolyClass ();
this.add(sp);

            ..... lots o code

            WrappingLabel label1 = new WrappingLabel();
            label1.setText("LABEL");

            sp.add(label1);

....... lots o code }
}
}

What I want to do is add a line, right after label1 is defined, with:
label1.setAlignment(PositionConstants.CENTER);

So yes, I can use your tick to rename the method, but then it is going just nasty going to dig the WrappingLabel out of the Figure by calling getChildren and finding the WrappingLabel.

It seems to me if I have the expectation of repeatedly generating my codebase as I add features, it is going to be a LOT of work to preserve the @generated sections so code generation will still work. Thus performing relatively simple things like centering a label, suddenly become quite onerous.

The good news is (I hope!), there are lots of people using GMF, who must be already dealing with these issues, which gets back to me asking the group (and you Ed :) "How does code generation and custom code co-exist in a normal (GMF) project?"

Oh, and any ideas on my problem stated above would be much appreciated! :)

Ed Merks wrote:
If you have a method foo(), you can rename it fooGen (still with @generated on it) and define a new method foo() (without @generated on it) that calls fooGen(). In this way, you can ensure that fooGen() will still be generated but your changes in foo() that specialize it will not be lost. Not sure if that works for what you're trying to do...


RefuX wrote:
I was looking into centering my text in a label and I was able to figure out that in the generated code I can change the code in my 'createContents' method to set the alignment on the WrappingLabel to center.

However I'm still in the early days of tweaking my gmfgraph etc.. and as soon as I regenerate I will lose my custom code in the 'createContents' method. I don't want to do a @generated not, since there is still plenty of tweaking to do, and I do want the 'createContents' method to continue to be generated :)

So what do people typically do in this situation?

My expectation was that code generation would continue throughout the life-cycle of a GMF project. Maybe later on I decide to add some more diagram elements or change the ones I currently have. I'd sure like to continue to generate GMF code. But how can I continue to use GMF if all my custom code gets removed? Sure I could "@generated not" on all the sections I want to keep, but once I stop generated code being placed in places like my createContents method, then what value is GMF providing me now?

Anyways, I'm sure people have an approach that they have come up with that works well. I'd sure like to know what it is! :)

p.s. If anyone can tell me how to define the center alignment on a label in the gmpgraph, that would be great