Bug 268533 [Viewers] Weird painting when using MOUSE_CLICK_ACTIVATION
bundles/org.eclipse.jface/src/org/eclipse/jface/viewers/FocusCellHighlighter.java
private ColumnViewer viewer;
	/**
	 * @param viewer
	 */
	public FocusCellHighlighter(ColumnViewer viewer) {
		this.viewer = viewer;
	}
	/**
	 * @return the focus cell
	 */
	public ViewerCell getFocusCell() {
		return viewer.getColumnViewerEditor().getFocusCell();
	}
	/**
	 * Called by the framework when the focus cell has changed. Subclasses may
	 * extend.
	 *
	 * @param cell
	 *            the new focus cell
	 * @deprecated use {@link #focusCellChanged(ViewerCell, ViewerCell)} instead