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
}
		
		
		
		mapElement(element, item);
	}
	/**
	 * Disassociates the given SWT item from its corresponding element. Sets the
	 * item's data to <code>null</code> and removes the element from the
	 * element map (if enabled).
	 * 
	 * @param item
	 *            the widget
	 */
	protected void disassociate(Item item) {
		Object element = item.getData();
		Assert.isNotNull(element);
		
		unmapElement(element, item);
		item.setData(null);
	}
	/**
	 * Returns the widget in this viewer's control which represents the given
	 * element if it is the viewer's input.
	 * <p>
	 * This method is internal to the framework; subclassers should not call
	 * this method.
	 * </p>
	 * 
	 * @param element