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
}
			}
			public void widgetDefaultSelected(SelectionEvent e) {
				handleDoubleSelect(e);
			}
		});
		handler.addPostSelectionListener(new SelectionAdapter() {
			public void widgetSelected(SelectionEvent e) {
				handlePostSelect(e);
			}
		});
		handler.addOpenListener(new IOpenEventListener() {
			public void handleOpen(SelectionEvent e) {
				StructuredViewer.this.handleOpen(e);
			}
		});
	}
	/**
	 * Returns whether this viewer has any filters.
	 * @return boolean
	 */
	protected boolean hasFilters() {
		return filters != null && filters.size() > 0;
	}
	/**
	 * Refreshes this viewer starting at the given element.
	 * 
	 * @param element
	 *            the element
	 */