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
control.setBackground(background);
				control.setForeground(foreground);
			}
			
			if(fontProvider == null){
				if(usedDecorators && font != null) {
					control.setFont(font);
				}
			} else {
				control.setFont(font);
			}
			
			clear();
		}
		
	
		/* (non-Javadoc)
		 * @see org.eclipse.jface.viewers.StructuredViewer.ColorAndFontManager#applyFontsAndColors(org.eclipse.swt.custom.TableTreeItem)
		 */
		public void applyFontsAndColors(TableTreeItem control) {
			
			if(colorProvider == null){
				if(usedDecorators){
					
					if(background != null) {
						control.setBackground(background);
					}
				
					if(foreground != null) {