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
}
    /**
     * Collapses the subtree rooted at the given element or tree path to the given level.
     * 
     * @param elementOrTreePath
     *           the element or tree path
     * @param level
     *           non-negative level, or <code>ALL_LEVELS</code> to collapse
     *           all levels of the tree
     */
    public void collapseToLevel(Object elementOrTreePath, int level) {
        Assert.isNotNull(elementOrTreePath);
        Widget w = internalGetWidgetToSelect(elementOrTreePath);
        if (w != null) {
			internalCollapseToLevel(w, level);
		}
    }
    /**
     * Creates all children for the given widget.
     * <p>
     * The default implementation of this framework method assumes that <code>widget.getData()</code>
     * returns the element corresponding to the node. Note: the node is not
     * visually expanded! You may have to call <code>parent.setExpanded(true)</code>.
     * </p>
     * 
     * @param widget
     *           the widget
     */
    protected void createChildren(final Widget widget) {
        final Item[] tis = getChildren(widget);