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
if (control != null && !control.isDisposed()) {
			updateSelection(getSelection());
		}
	}
	/**
	 * Handles a post select event from the widget.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method.
	 * </p>
	 * 
	 * @param e the SWT selection event
	 */
	protected void handlePostSelect(SelectionEvent e) {
		SelectionChangedEvent event = new SelectionChangedEvent(this, getSelection());
		firePostSelectionChanged(event);
	}
	/*
	 * (non-Javadoc) Method declared on Viewer.
	 */
	protected void hookControl(Control control) {
		super.hookControl(control);
		OpenStrategy handler = new OpenStrategy(control);
		handler.addSelectionListener(new SelectionListener() {
			public void widgetSelected(SelectionEvent e) {
				
				
				
				if (!inChange) {
					handleSelect(e);