Bug 108102 [Viewers] Project expands in wrong working set
I am using "Show->Working Sets" in the package explorer. Some of the working sets contain the same project: Working Set-1: - Project-A - Project-B - Project-C Working Set-2: - Project-B - Project-C - Project-D If I now double-click "Working Set-1.Project-B" "Project-B" in working set "Working Set-2" will be expanded. If the working set "Working Set-2" itself is not expanded it will seem as if nothing happens, but after expanding "Working Set-2" one can see the changed state of the project. Double-clicking "Working Set-2.Project-B" works as expected.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
internalExpand(element, false);
            expandedElements.put(element, element);
        }
        
        
        
        
        internalSetExpanded(expandedElements, getControl());
    }
    /**
     * Sets which nodes are expanded in this viewer's tree. The given list
     * contains the tree paths that are to be expanded; all other nodes are to
     * be collapsed.
     * <p>
     * This method is typically used when restoring the interesting state of a
     * viewer captured by an earlier call to <code>getExpandedTreePaths</code>.
     * </p>
     * 
     * @param treePaths
     *           the array of expanded tree paths
     * @see #getExpandedTreePaths()
     * 
     * @since 3.2
     */
    public void setExpandedTreePaths(TreePath[] treePaths) {
        assertElementsNotNull(treePaths);
        final IElementComparer comparer = getComparer();
        IElementComparer treePathComparer = new IElementComparer(){