Troubles copying node

GoDiagram (6 and previous)
1

Hi,

I’m trying to create a node that contains (multiple) shapes and a variable number of ports. I choose to extend GoNode.

I’m running into some trouble when copying nodes. I 've created a small test node to illustrate the problem.

class ModuleNode : GoNode
{
private GoRectangle rect;
public ModuleNode()
{
rect = new GoRectangle();
rect.Selectable = false;
Add(rect);
Size = new SizeF(50, 100);
}
}

I’m not able to do copy paste on a this node in a GoView. The strange thing is, drag and drop from a GoPalette on a GoView works like a charm. This just creates a copy, right?

I’ve searched this forum on related problems and I suppose a need to override the CopyObject and/or CopyChildren methods. I haven’t found anything regarding copying nodes in the documentation.

So to the point, why doesn’t the copying work? What do I need to do to make it work? Is there any documentation available regarding the copying of nodes and updating references?

Any help is very much appreciated.

Edit: adding [Serializable] to the class definition helps a lot … ;)
However I’m still looking for information regarding copying of nodes and specifically members that hold references.

2


GoGroup.CopyObject will call CallChildren to make copies of the children of the group.
here’s how GoSimpleNode does CopyChildren, to set the myXyz members.
protected override void CopyChildren(GoGroup newgroup, GoCopyDictionary env) {
base.CopyChildren(newgroup, env);
GoSimpleNode newnode = (GoSimpleNode)newgroup;
newnode.myIcon = (GoObject)env[myIcon];
newnode.myLabel = (GoText)env[myLabel];
newnode.myInPort = (GoPort)env[myInPort];
newnode.myOutPort = (GoPort)env[myOutPort];
}
But, you may find it easier to avoid the myXyz members and just use AddChildName / FindChild to reference your rectangle.