/*
* org.openmicroscopy.shoola.agents.dataBrowser.browser.ImageDisplayVisitor
*
*------------------------------------------------------------------------------
* Copyright (C) 2006-2008 University of Dundee. All rights reserved.
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*------------------------------------------------------------------------------
*/
package org.openmicroscopy.shoola.agents.dataBrowser.browser;
//Java imports
//Third-party libraries
//Application-internal dependencies
/**
* Defines an interface for operations that have to be performed on a
* visualization tree.
* <p>This interface allows you to define arbitrary operations that can then
* be applied to the tree by calling the
* {@link ImageDisplay#accept(ImageDisplayVisitor) accept} method of
* {@link ImageDisplay}, usually on the root node.
* or by calling the
* {@link ImageDisplay#accept(ImageDisplayVisitor, int) accept} method of
* {@link ImageDisplay}.
* When a node is visited, the corresponding <code>visit</code> method is
* called, passing a reference to the node. That is, if an {@link ImageNode}
* is being visited, then the {@link #visit(ImageNode)} method is called.
* Otherwise the {@link #visit(ImageSet)} is called for {@link ImageSet} nodes.
* </p>
* <p>As an example think of highlighting all images that have been annotated.
* You would define a class that implements this interface to perform the
* highlight operation and then pass an instance to the <code>accept</code>
* method of the root node. The {@link #visit(ImageSet)} method would have a
* no-op implementation and the {@link #visit(ImageNode)} method would be
* implemented along the lines of (pseudo code):</p>
* <pre>
* img = node.getHierarchyObject()
* if img has annotation
* then node.setHighlight(color)
* </pre>
*
* @author Jean-Marie Burel
* <a href="mailto:j.burel@dundee.ac.uk">j.burel@dundee.ac.uk</a>
* @author Donald MacDonald
* <a href="mailto:donald@lifesci.dundee.ac.uk">donald@lifesci.dundee.ac.uk</a>
* @version 3.0
* <small>
* (<b>Internal version:</b> $Revision: $Date: $)
* </small>
* @since OME3.0
*/
public interface ImageDisplayVisitor
{
/**
* Indicates that only the {@link ImageNode} nodes will be visited.
*/
public static final int IMAGE_NODE_ONLY = 0;
/**
* Indicates that only the {@link ImageSet} nodes will be visited.
*/
public static final int IMAGE_SET_ONLY = 1;
/**
* Indicates that {@link ImageNode} and {@link ImageSet} nodes will be
* visited.
*/
public static final int ALL_NODES = 2;
/**
* Visits the specified {@link ImageNode}.
*
* @param node The node to visit.
*/
public void visit(ImageNode node);
/**
* Visits the specified {@link ImageSet}.
*
* @param node The node to visit.
*/
public void visit(ImageSet node);
}