Columns & FilteredTree in Eclipse

I'm trying to create a FilteredTree with several colum开发者_JS百科ns with no luck. If I use a TreeViewer the columns work fine but when I switch to using a FilteredTree I can only get it to work if I remove the columns, so I'm wondering if there is a way to use FilteredTree with columns.

You can certainly use a FilteredTree with a column viewer. For example (and this also demonstrates preserving the use of a TreeColumnLayout using a FilteredTree):

final TreeColumnLayout tl = new TreeColumnLayout();

PatternFilter patternFilter = new PatternFilter();
patternFilter.setIncludeLeadingWildcard(true);
FilteredTree ft = new FilteredTree(treeViewerComposite, SWT.FULL_SELECTION | SWT.H_SCROLL | SWT.V_SCROLL | toolkit.getBorderStyle() | Window.getDefaultOrientation(), patternFilter, true) {            
   @Override
   protected Control createTreeControl(Composite parent, int style) {
       Control c = super.createTreeControl(parent, style);
       c.setLayoutData(null);
       c.getParent().setLayout(tl);
       return c;
   }        
};

viewer = ft.getViewer();
viewer.getTree().setHeaderVisible(true);

Now you can just create TreeColumn's the usual way and your columns will appear.

You can do it the same way as with a normal Tree. Here is a full setup.

PatternFilter patternFilter = new PatternFilter();
patternFilter.setIncludeLeadingWildcard(true);
filteredTree = new FilteredTree(getContainer(), SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL, patternFilter, true);

TreeViewer viewer = filteredTree.getViewer();
tree = viewer.getTree();
tree.setHeaderVisible(true);

TreeColumn modelColumn = new TreeColumn(tree, SWT.LEFT);
modelColumn.setText("Model");
modelColumn.setWidth(400);

TreeViewerColumn treeViewerModelColumn = new TreeViewerColumn(viewer, modelColumn);
treeViewerModelColumn.setLabelProvider(new ColumnLabelProvider());

Yes, there is a way, and the solution it is outlined here: http://eclipsesource.com/blogs/2012/10/26/filtering-tables-in-swtjface/

The point is the default PatternFilter needs tree leaves to be instance of ILabelProvider. In a column-based treeviewer there is no single text representation for the tree leaf.

So, if you are using TreeViewerColumns as tree columns, the PatternFilter will use the ColumnLabelProvider for each column. In this case you'll fix by subclassing the PatternFilter and overriding it with your own isLeafMatch(..)

Otherwise, when using TreeColumns to define columns, the TreeViewer will need to have a ITableLabelProvider. Beyond this, you'll subclass the PatternFilter and, again, override the method isLeafMatch(..)