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[news.eclipse.tools.gef] Re: editable figure
Brian Fernandes wrote:
What Randy means is, in EditPart#createFigure of the connection you create
2 figures. One is the the PolylineConnection that you used for the
connection (this is the figure you return from createFigure) and a second
Label figure that you use to label the connection. You can add this figure
as a child of the main figure using Figure#add 

I allready used this way.

but I think that would mess
up the layout of the main figure and its genuine children. So better is to
place the label onto your diagram layer yourself.

what is the digram layer?. do you mean add child in to BaseDiagram(RootDiagram).


As I mentioned in my 
previous post, you can implement AncestorListener in your Label figure so
that it moves along with the main figure. Have a look at some of the Handles
in GEF to see how this works.



  	


Regarding the DirectEditing with this technique; I'm not too sure.

If you choose to use a complete model / EditPart to implement labels, then
DirectEditing is not a big problem - it's exactly the same as direct editing
in Logic. If you wanted to allow the user the flexibility of positioning the
label himself, I think it would not be too hard either.  The figure used for
the Label editpart is the same as detailed above. The label model must NOT
be added as a child of the model to be labelled - else the label will mess
up the layout of the figure again.



If i create separate Editpart, Model for Label, is it possible
to add Labels along with connections, figures?.



for example,
       public IFigure createFigute(){
Connection con = new PolylineConnection();
               con.add(new MyLabel());
       }



If MyLabel is a model class, you cannot add it as a child to the connection
FIGURE. I would suggest that your model class (of the figure to be labelled)
should have a member variable for the labels model.


Depending on the flexibility you need, both approaches (with and without
model / editParts) are workable, (I started off without using a separate
model / editpart, but ultimately found that for my needs, using a model for
the label would be simpler and cleaner).

Have a look at my "Labelling EditParts" post for more details.

All the best,
Brian.