Bug 171415 [Viewers] Table viewer needs to clear label, image when items are reused
If an item is reused for a different element on a refresh, the table viewer needs to clear the label and image from the item being reused. This is necessary to communicate to the label provider that a new label is needed (i.e. the label provider may defer providing a label if decorators are not ready). This is what the tree viewer does. To see the problem, open the Java Browsing perspective and select a Java project. Then click between different packages. Notice that some of the labels in the Types list take a while to update. Opening one of these reveals that the label is showing the wrong text.
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/AbstractTableViewer.java
unmapElement(data, item);
				}
				item.setData(element);
				mapElement(element, item);
			}
			int columnCount = doGetColumnCount();
			if (columnCount == 0)
				columnCount = 1;
			
			
			for (int column = 0; column < columnCount || column == 0; column++) {
				ViewerColumn columnViewer = getViewerColumn(column);
				columnViewer.refresh(updateCell(getViewerRowFromItem(item),
						column));
				
				
				if (item.isDisposed()) {
					unmapElement(element, item);
					return;
				}
			}
		}
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.ColumnViewer#getColumnViewerOwner(int)
	 */
	protected Widget getColumnViewerOwner(int columnIndex) {
		if (columnIndex < 0