CODEWITHSUNDEEP
eclipse-rcpjfacetreeviewer
Wolfgang R.
Wolfgang R.

Reputation: 333

JFace TreeViewer restore selection

I'm doing my first RCP example using the TreeViewer for directory browsing.

My work did start from the example http://www.ibm.com/developerworks/opensource/library/os-ecgui1/

For the TreeViewer of file entries I want to make the last selection persistent to open the viewer by the same selection next time.

From the selected file I catched the path and store/retrieve this single string.

On reopening I traverse the ITreeContentProvider and find the corresponding File node (and capture the nodes in between).

Next I use

window.getTree().setSelection(new StructuredSelection(target));

with target as a list of Files holding the path.

This works for the top level directories under C:

But restoring a deeper path fails. The next level is initially not expanded and fails in the AbstractTreeViewer.setSelectionToWidget().

My feeling is that I do not handle the setSelection() parameter well but I found no suitable example.

Do you have a simple example for me showing how to restore such a path selection?

thanks in advance

Wolfgang R.

Upvotes: 0

Views: 469

Answers (1)

Wolfgang R.
Wolfgang R.

Reputation: 333

I've found it. The used example code has a small bug.

public class FileTreeContentProvider implements ITreeContentProvider
{
...
public Object getParent(Object element)
{
  // wrong return ((File)element).getParent();
  return ((File)element).getParentFile();
}

Upvotes: 1

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