Bug 219483 [Markers] MarkerField needs to support font and colours
Some users want to be able to set the font and colour of an entry in the markers view. We should pass in a ViewerCell for this.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/MarkerCompletionField.java
return getCompleteImage();
		case NOT_DONE:
			return MarkerSupportInternalUtilities
					.createImage(INCOMPLETE_IMAGE_PATH);
		default:
			return null;
		}
	}
	/**
	 * Return the constant that indicates whether or not the receiver is done
	 * 
	 * @param item
	 * @return 1 if it is done, 0 if it not and -1 if it cannot be determined.
	 */
	private int getDoneConstant(MarkerItem item) {
		int done = UNDEFINED;
		if (item.isConcrete()
				&& item.getAttributeValue(IMarker.USER_EDITABLE, true)) {
			done = NOT_DONE;
			if (item.getAttributeValue(IMarker.DONE, false)) {
				done = DONE;
			}
		}
		return done;
	}
	/**
	 * Return the image for task completion.
	 * 
	 * @return Image
	 */