Tree Mapping in GOJS :: Only Parent mapped then allow child mapping

GoJS
#1

Tree Mapping in GOJS. I like to do if parent is mapped together then I allow children to map in the tree.

+ Parent1---------------------------Parent2
   child1------------------------------Child10
   child2
  +Child3-------------------------------+Child11
     child4--------------------------------Child12

Could you please help on this?

#2

That sounds as if you need to define a linkValidation predicate: GoJS Validation -- Northwoods Software

#3

How to restrict the link to delete from the tree mapping

if (e.change === go.ChangedEvent.Remove && e.propertyName === "linkDataArray") {

return false;
}

I have to restrict the user to delete the link… above code is not working

#4

Override CommandHandler | GoJS API

For example:

$(go.Diagram, ...,
{
  "commandHandler.canDeleteSelection":
    function() {
      if (this.diagram.selection.any(function(p) {
          return p instanceof go.Link && ... ;
        })) return false;
      return go.CommandHandler.prototype.canDeleteSelection.call(this);
    },
  ...
});
#5

We need the From and to points of the try to deleted items

#6

Surely you already know about Link.fromNode and Link.toNode?

#7

2 posts were split to a new topic: Unable to call getDocumentPoint

#8

I have already listed the tree in tree mapping… I need to replace the nodeDataArray with new values it should be in the same tree format. I changed it but its not working…

#9

One doesn’t normally replace the Model.nodeDataArray unless one actually wants to replace the whole Diagram.model. This question does not involve the tree mapping sample, so I think it would be better as a separate topic.