Bug 24521 [Viewers] TreeViewer.update() does not work correctly with filter
When I add an element which does not satisfy the filtering condition and then update it so that it does, call to update does not show the element. This is because[StructuredViewer.update]: public void update(Object element, String[] properties) { Assert.isNotNull(element); | Widget item = findItem(element); | if (item == null) | return; the code silently ignores that the element may become visible... btw. later in code of this method: if (needsRefilter) { refresh(); return; } This is quite inefficient, as it needs to query all visible items; however only one element may actually change (change visibility and/or sort order).
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/StructuredViewer.java
* 
	 * @see IDoubleClickListener#doubleClick
	 */
	protected void fireDoubleClick(final DoubleClickEvent event) {
		Object[] listeners = doubleClickListeners.getListeners();
		for (int i = 0; i < listeners.length; ++i) {
			final IDoubleClickListener l = (IDoubleClickListener) listeners[i];
			SafeRunnable.run(new SafeRunnable() {
				public void run() {
					l.doubleClick(event);
				}
			});
		}
	}
	/**
	 * Notifies any open event listeners that a open event has been received.
	 * Only listeners registered at the time this method is called are notified.
	 * 
	 * @param event
	 *            a double-click event
	 * 
	 * @see IOpenListener#open(OpenEvent)
	 */
	protected void fireOpen(final OpenEvent event) {
		Object[] listeners = openListeners.getListeners();
		for (int i = 0; i < listeners.length; ++i) {
			final IOpenListener l = (IOpenListener) listeners[i];
			SafeRunnable.run(new SafeRunnable() {
				public void run() {
					l.open(event);