Bug 103747 [Viewers] calling refresh on treeviewer in treeExpanded function, but it mess
I tried calling refresh on treeviewer in treeExpanded function. The result is it mess up the tree, there is only one children without a label. Code to reproduce: public void createPartControl(Composite parent) { viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL); drillDownAdapter = new DrillDownAdapter(viewer); viewer.setContentProvider(new ViewContentProvider()); viewer.setLabelProvider(new ViewLabelProvider()); viewer.setSorter(new NameSorter()); viewer.setInput(getViewSite()); viewer.addTreeListener(new ITreeViewerListener() { public void treeCollapsed(TreeExpansionEvent event) { } public void treeExpanded(TreeExpansionEvent event) { viewer.refresh(event.getElement()); }}); }
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTreeViewer.java
}
	/**
	 * Initializes the tree with root items, expanding to the appropriate
	 * level if necessary.
	 *
	 * @param tree the tree control
	 * @since 3.3
	 */
	protected void internalInitializeTree(Control tree) {
		createChildren(tree);
		internalExpandToLevel(tree, expandToLevel);
	}
	/**
	 * Recursively collapses the subtree rooted at the given widget to the given
	 * level.
	 * <p>
	 * </p>
	 * Note that the default implementation of this method does not call
	 * <code>setRedraw</code>.
	 * 
	 * @param widget
	 *            the widget
	 * @param level
	 *            non-negative level, or <code>ALL_LEVELS</code> to collapse
	 *            all levels of the tree
	 */
	protected void internalCollapseToLevel(Widget widget, int level) {
		if (level == ALL_LEVELS || level > 0) {
			if (widget instanceof Item) {
				setExpanded((Item) widget, false);