How to get the columns of a jface Tree Viewer?

Question

Having a reference to a jface TreeViewer, how can you get a list of its columns, e.g. TreeViewerColumn objects? Something like:

TreeViewer treeViewer = (TreeViewer)viewer;
TreeViewerColumn[] treeViewerColumns = treeViewer.getColumns();

Is it just me or there isn't an obvious way to do this?

What I'm trying to do is to add editing support for items in Project Explorer. I have a reference to the Project Explorer's tree viewer, but I need to obtain its TreeViewerColumn and do:

column.setEditingSupport(...);

score 3 · Accepted Answer · edited Apr 01 '16 at 15:59

3

A reference to the TreeViewerColumn is stored in the data of the TreeColumn. The following should give you a list of TreeViewerColumns:

List<TreeViewerColumn> treeViewerColumns = new ArrayList<TreeViewerColumn>();
TreeColumn[] columns = treeViewer.getTree().getColumns();
for (TreeColumn column : columns) {
    Object data = column.getData(Policy.JFACE + ".columnViewer");
    if (data instanceof TableViewerColumn) {
        TreeViewerColumn tvc = (TreeViewerColumn) data;
        treeViewerColumns.add(tvc);
    }
}

edited Apr 01 '16 at 15:59

flavio.donze

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answered Jul 11 '13 at 16:05

Nick Wilson

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Thanks! The above snippet does exactly that, but the Project Explorer's tree viewer appears to have no explicitly added columns - treeViewer.getTree().getColumns() returns an empty array. Anyway, this is another question. – pm_ Jul 12 '13 at 06:13

How to get the columns of a jface Tree Viewer?

1 Answers1