Eclipse Community Forums: GEF » Zest Label Provider problem

Help

Home

Home » Eclipse Projects » GEF » Zest Label Provider problem

Show: Today's Messages :: Show Polls :: Message Navigator

Zest Label Provider problem [message #646893]

Sun, 02 January 2011 17:29

No real name

Messages: 2
Registered: January 2011

Junior Member

Hi,

I did the Eclipse Zest Tutorial by Lars Vogel and tried everything, but I can never see the Labels Text.
I think it's a bug.

http://www.vogella.de/articles/EclipseZest/article.html

The problem is the following:
Actually the class ZestLabelProvider should check if there exists an instance of MyConnection:

if (element instanceof MyConnection){
            MyConnection myConnection = (MyConnection) element;
            return myConnection.getLabel();
}

This is the connection:

MyConnection connect = new MyConnection("1", "Name der Verbindung", nodes.get(0),
                nodes.get(1));

But there is never an instance od MyConnection. Only an instance of EntityConnection.
So, there is never a label for a connection.

The label provider is never called for connections with the IGraphEntityContentProvider.

Is there a solution for this?

Report message to a moderator

Re: Zest Label Provider problem [message #646898 is a reply to message #646893]

Sun, 02 January 2011 20:20

Fabian Steeg

Messages: 76
Registered: July 2009

Member

It seems to be a bug in the tutorial. I'm sure Lars would be happy if you reported it at his Google group.

The main conceptual problem seems to be the fact that in View.java the GraphViewer's input is set to the nodes, which don't contain references to connections. One possible approach would be to set the connections as the viewer's input, and get the nodes from the connections in an IGraphContentProvider, similar to the way it's done in this snippet.

Report message to a moderator

Re: Zest Label Provider problem [message #648315 is a reply to message #646898]

Wed, 12 January 2011 11:48

Johan Schulz

Messages: 20
Registered: November 2010

Junior Member

There is a solution, you have to implement the ISelfStyleProvider interface in your LabelProvider implementation.
This interface has two methods, one for styling nodes and one for connections.

With this interface you should be able to style what you want.

Regards
Johan

Report message to a moderator

Previous Topic:	Need optimized way to display tree items
Next Topic:	Changing the size of a EditPart without affecting the Figure

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

]

Current Time: Thu Apr 25 23:19:41 GMT 2024

.:: Contact :: Home ::.

Breadcrumbs

Sign up to our Newsletter