[news.eclipse.platform.swt] Re: TreeViewer with visible root

[Mark Dexter <dextercowley@xxxxxxxxx>]

Sarah Ettritch wrote:
> I'm having a problem with TreeViewer when I want the root node of the model 
> to be visible (root being the node that doesn't have any parents). Expanding 
> the root node always shows the root node as a child. For example, if I 
> expand root, I see root, root. If I expand that, I see root, root, root, 
> etc.
>
> From debugging the code, it looks like the structured viewer ultimately 
> calls getElements(), rather than getChildren(), when getting children for 
> the root. Since I want the root to be visible, getElements() returns root, 
> hence the root, root, root, etc. Is there a restriction on TreeViewer that 
> the root can't be visible? 
Hi Sarah. What are you passing in the setInput() method and what are you 
doing in the getElements() method? As I understand it, if you are 
passing the root element in the setInput(), you just return that same 
element as an object array in the getElements() method, as follows:

public Object getElements(Object inputElement) {
  return new Object[] {inputElement};

Hope this helps. Mark