Bug 108493 [Markers] Show tooltips for table columns in marker views
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerCompletionField.java
static final String COMPLETE_IMAGE_PATH = "$nl$/icons/full/obj16/complete_tsk.gif"; 
	static final String INCOMPLETE_IMAGE_PATH = "$nl$/icons/full/obj16/incomplete_tsk.gif"; 
	/**
	 * Create a new instance of the receiver.
	 */
	public MarkerCompletionField() {
		super();
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.internal.provisional.views.markers.api.MarkerField#getDefaultColumnWidth(org.eclipse.swt.widgets.Control)
	 */
	public int getDefaultColumnWidth(Control control) {
		return getCompleteImage().getBounds().width + IDialogConstants.BUTTON_MARGIN;
	}
	
	/* (non-Javadoc)
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerField#getColumnHeaderText()
	 */
	public String getColumnHeaderText() {
		return MarkerSupportConstants.EMPTY_STRING;
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.internal.provisional.views.markers.MarkerField#getValue(org.eclipse.ui.internal.provisional.views.markers.MarkerItem)
	 */
	public String getValue(MarkerItem item) {
		return MarkerSupportConstants.EMPTY_STRING;
	}