Re: [gef-dev] gef4 removing nodes from a graph does not refresh the view

[Alexander Nyßen <nyssen@xxxxxxxxx>]

Hi Arne, 

can you please ask this (again) in the forum (http://www.eclipse.org/forums/index.php?t=thread&frm_id=81)? It’s the appropriate place where we can further investigate your problem. 

"Technical questions and discussions about using GEF should be posted to the newsgroups. Mailing lists at eclipse.org are intended for use by developers actually working on or otherwise contributing to day-to-day development. The development mailing lists are the way design and implementation issues are discussed and decisions voted on by the committers."

Cheers

Alexander

Am 09.01.2016 um 07:08 schrieb Arne.Adams@xxxxxxxxxxx:

Hi,

I have a adapted the CustomNodeExample to provide context menu for a graph.

I observer, that the graph won't get refreshed, if I only remove nodes and edges, however if I add a node, the graph view does get refreshed.

Here is the code, that changes the contents of the graph

  private static NodeContextMenuEntry includes(Scope scope)
  {
    return new NodeContextMenuEntry("show includes", "hide includes")
    {
      @Override
      protected void offAction(Graph graph, Node scopeNode)
      {
        WorkflowScopeNodeModel scopeNodeModel = (WorkflowScopeNodeModel) NodeModel.get(scopeNode);
        List<Node> nodes = graph.getNodes();
        ListIterator<Node> nodeIter = nodes.listIterator();
        Node hack = null;
        while (nodeIter.hasNext())
        {
          Node n = nodeIter.next();
          if (scopeNodeModel.includeNodes.contains(n))
          {
            hack = n;
            nodeIter.remove();
          }
        }
        ListIterator<Edge> edgeIter = graph.getEdges().listIterator();
        while (edgeIter.hasNext())
        {
          Edge e = edgeIter.next();
          if (scopeNodeModel.includeEdges.contains(e))
          {
            edgeIter.remove();
          }
        }
        // this is a hack - I have no idea, why removing does not update the graph whereas adding does.
        if(null != hack)
        {nodes.add(hack);nodes.remove(hack);}
      }

      @Override
      protected void onAction(Graph graph, Node scopeNode)
      {
        WorkflowScopeNodeModel scopeNodeModel = (WorkflowScopeNodeModel) NodeModel.get(scopeNode);
        List<Node> nodes = graph.getNodes();
        for (Node n : scopeNodeModel.includeNodes)
        {
          nodes.add(n);
        }
        List<Edge> edges = graph.getEdges();
        for (Edge e : scopeNodeModel.includeEdges)
        {
          edges.add(e);
        }
      }
    };
  }

 

If you cannot reproduce the behaviour, I'll post a more complete example.

 

Cheers,

Arne

 

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