Grouping nodes

GoXam
1

Hi,

I need to group selected nodes. User selects nodes than right click and selects group. User selects the node to use for grouping.

I have selected nodes and a node to use for grouping but i couldn’t make a group from them. I use the code below.??? I couldn’t find any sample codes.

ISubGraphLinksModel subGraphModel = this.objectDiagram.Model as ISubGraphLinksModel;
 
                if (subGraphModel == null)
                {
                    return;
                }
 
                List<ContainerObject> containers = new List<ContainerObject>();
 
                foreach (var node in this.objectDiagram.Model.NodesSource)
                {
                    if (node is ContainerObject)
                    {
                        containers.Add(node as ContainerObject);
                    }
                }
 
                if (containers.Count <= 0)
                {
                    NatekMessageBox.ShowAlert(Alerts.NoContainer, ApplicationConfiguration.MessageCloseSeconds);
                    return;
                }
 
                SelectContainerChildWindow window =
                                    new SelectContainerChildWindow(containers);

 

            window.Closed += <span style="color: blue;">delegate</span>(<span style="color: blue;">object</span> parent, <span style="color: rgb43, 145, 175;">EventArgs</span> args)
            {
                <span style="color: blue;">if</span> (window.DialogResult == <span style="color: blue;">true</span>)
                {
                    <span style="color: blue;">if</span> (window.SelectedContainer != <span style="color: blue;">null</span>)
                    {
                        window.SelectedContainer.IsSubGraph = <span style="color: blue;">true</span>;

                        subGraphModel.SetGroupNode(window.SelectedContainer, <span style="color: blue;">null</span>);

                        subGraphModel.AddNode(window.SelectedContainer);

                        <span style="color: blue;">foreach</span> (<span style="color: rgb43, 145, 175;">Part</span> part <span style="color: blue;">in</span> <span style="color: blue;">this</span>.objectDiagram.SelectedParts)
                        {
                            <span style="color: blue;">if</span> (part.Data <span style="color: blue;">is</span> <span style="color: rgb43, 145, 175;">BaseNetworkGraphObject</span>)
                            {
                                <span style="color: blue;">if</span> (part.Data <span style="color: blue;">is</span> <span style="color: rgb43, 145, 175;">ContainerObject</span> &&
                                    (part.Data <span style="color: blue;">as</span> <span style="color: rgb43, 145, 175;">ContainerObject</span>).Key == window.SelectedContainer.Key)
                                {
                                    <span style="color: blue;">continue</span>;
                                }

                                <span style="color: rgb43, 145, 175;">BaseNetworkGraphObject</span> node = part.Data <span style="color: blue;">as</span> <span style="color: rgb43, 145, 175;">BaseNetworkGraphObject</span>;

                                node.SubGraphKey = window.SelectedContainer.Key;
                                window.SelectedContainer.MemberKeys.Add(node.Key);
                                subGraphModel.AddMemberNodeKey(window.SelectedContainer, node.Key);
                            }
                        }

                        subGraphModel.DoGroupNodeChanged(window.SelectedContainer);
                        <span style="color: blue;">this</span>.objectDiagram.UpdateLayout();
                    }
                }
            };

            window.Show();</pre>
2

Just call Diagram.CommandHandler.Group().
Remember to set PrototypeGroup.

3

Hi,

I made my code worked.

But my problem is now update layout after grouping. when i serialize my grouped diagram and deserialize i see my group but i can’t see my group after my grouping function.

How can i update the layout after grouping???

4

Fyi, UIElement.UpdateLayout has nothing to do with GoXam and diagram layout.

5

Do you mean diagram must do it???

6

By default Goxam will assign positions to all nodes that do not already have one.

But I do not know what values you have given to Diagram.Layout and Group.Layout.

7

i use Default diagram layout.

8

If you look at the persisted model data, are all of the nodes, including the new group data there? If you are data-binding the Node.Location, do they all have the right values? Does the group data know that it is a group and not a regular node?

9

Thanks, I figured it out.

I am a GIS developer and I am new to this API. In GIS you always refresh map after changing it :)

10

Well, in GoXam you should always make changes to your model or model data inside a transaction.