GraphContextMenu.java

/*
Copyright 2008-2010 Gephi
Authors : Mathieu Bastian <mathieu.bastian@gephi.org>
Website : http://www.gephi.org

This file is part of Gephi.

DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

Copyright 2011 Gephi Consortium. All rights reserved.

The contents of this file are subject to the terms of either the GNU
General Public License Version 3 only ("GPL") or the Common
Development and Distribution License("CDDL") (collectively, the
"License"). You may not use this file except in compliance with the
License. You can obtain a copy of the License at
http://gephi.org/about/legal/license-notice/
or /cddl-1.0.txt and /gpl-3.0.txt. See the License for the
specific language governing permissions and limitations under the
License.  When distributing the software, include this License Header
Notice in each file and include the License files at
/cddl-1.0.txt and /gpl-3.0.txt. If applicable, add the following below the
License Header, with the fields enclosed by brackets [] replaced by
your own identifying information:
"Portions Copyrighted [year] [name of copyright owner]"

If you wish your version of this file to be governed by only the CDDL
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"[Contributor] elects to include this software in this distribution
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However, if you add GPL Version 3 code and therefore, elected the GPL
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Contributor(s):

Portions Copyrighted 2011 Gephi Consortium.
 */
package org.gephi.visualization.apiimpl;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import javax.swing.JMenu;
import javax.swing.JMenuItem;
import javax.swing.JPopupMenu;
import javax.swing.KeyStroke;
import org.gephi.datalab.api.DataLaboratoryHelper;
import org.gephi.datalab.spi.ContextMenuItemManipulator;
import org.gephi.graph.api.HierarchicalGraph;
import org.gephi.graph.api.Node;
import org.gephi.visualization.VizController;
import org.gephi.visualization.bridge.DHNSEventBridge;
import org.gephi.visualization.spi.GraphContextMenuItem;
import org.openide.util.Lookup;

/**
 *
 * @author Mathieu Bastian
 */
public class GraphContextMenu {

    private VizConfig config;
    private DHNSEventBridge eventBridge;

    public GraphContextMenu() {
        config = VizController.getInstance().getVizConfig();
        eventBridge = (DHNSEventBridge) VizController.getInstance().getEventBridge();
    }

    public JPopupMenu getMenu() {
        GraphContextMenuItem[] items = getGraphContextMenuItems();
        final Node[] selectedNodes = eventBridge.getSelectedNodes();
        final HierarchicalGraph graph = eventBridge.getGraph();
        JPopupMenu contextMenu = new JPopupMenu();

        //Add items ordered:
        Integer lastItemType = null;
        for (GraphContextMenuItem item : items) {
            item.setup(graph, selectedNodes);
            if (lastItemType == null) {
                lastItemType = item.getType();
            }
            if (lastItemType != item.getType()) {
                contextMenu.addSeparator();
            }
            lastItemType = item.getType();
            if (item.isAvailable()) {
                contextMenu.add(createMenuItemFromGraphContextMenuItem(item, graph, selectedNodes));
            }
        }

        return contextMenu;
    }

    /**
     * <p>Prepares an array with one new instance of every GraphContextMenuItem and returns it.</p>
     * <p>It also returns the items ordered first by type and then by position.</p>
     * @return Array of all GraphContextMenuItem implementations
     */
    public GraphContextMenuItem[] getGraphContextMenuItems() {
        ArrayList<GraphContextMenuItem> items = new ArrayList<GraphContextMenuItem>();
        items.addAll(Lookup.getDefault().lookupAll(GraphContextMenuItem.class));
        sortItems(items);
        return items.toArray(new GraphContextMenuItem[0]);
    }

    public JMenuItem createMenuItemFromGraphContextMenuItem(final GraphContextMenuItem item, final HierarchicalGraph graph, final Node[] nodes) {
        ContextMenuItemManipulator[] subItems = item.getSubItems();
        if (subItems != null && item.canExecute()) {
            JMenu subMenu = new JMenu();
            subMenu.setText(item.getName());
            if (item.getDescription() != null && !item.getDescription().isEmpty()) {
                subMenu.setToolTipText(item.getDescription());
            }
            subMenu.setIcon(item.getIcon());
            Integer lastItemType = null;
            for (ContextMenuItemManipulator subItem : subItems) {
                ((GraphContextMenuItem)subItem).setup(graph, nodes);
                if (lastItemType == null) {
                    lastItemType = subItem.getType();
                }
                if (lastItemType != subItem.getType()) {
                    subMenu.addSeparator();
                }
                lastItemType = subItem.getType();
                if (subItem.isAvailable()) {
                    subMenu.add(createMenuItemFromGraphContextMenuItem((GraphContextMenuItem)subItem, graph, nodes));
                }
            }
            if(item.getMnemonicKey()!=null){
                subMenu.setMnemonic(item.getMnemonicKey());//Mnemonic for opening a sub menu
            }
            return subMenu;
        } else {
            JMenuItem menuItem = new JMenuItem();
            menuItem.setText(item.getName());
            if (item.getDescription() != null && !item.getDescription().isEmpty()) {
                menuItem.setToolTipText(item.getDescription());
            }
            menuItem.setIcon(item.getIcon());
            if (item.canExecute()) {
                menuItem.addActionListener(new ActionListener() {

                    public void actionPerformed(ActionEvent e) {
                        new Thread() {

                            @Override
                            public void run() {
                                DataLaboratoryHelper.getDefault().executeManipulator(item);
                            }
                        }.start();
                    }
                });
            } else {
                menuItem.setEnabled(false);
            }
            if(item.getMnemonicKey()!=null){
                menuItem.setMnemonic(item.getMnemonicKey());//Mnemonic for executing the action
                menuItem.setAccelerator(KeyStroke.getKeyStroke(item.getMnemonicKey(),KeyEvent.CTRL_DOWN_MASK));//And the same key mnemonic + ctrl for executing the action (and as a help display for the user!).
            }
            return menuItem;
        }
    }

    private void sortItems(ArrayList<? extends GraphContextMenuItem> m) {
        Collections.sort(m, new Comparator<GraphContextMenuItem>() {

            public int compare(GraphContextMenuItem o1, GraphContextMenuItem o2) {
                //Order by type, position.
                if (o1.getType() == o2.getType()) {
                    return o1.getPosition() - o2.getPosition();
                } else {
                    return o1.getType() - o2.getType();
                }
            }
        });
    }
}