FDEBBundler.java

/*
 Copyright 2008-2012 Gephi
 Authors : Taras Klaskovsky <megaterik@gmail.com>
 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.

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 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
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 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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 Contributor(s):

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 */
package org.gephi.bundler;

import java.util.Arrays;
import org.gephi.edgelayout.spi.EdgeLayout;
import org.gephi.edgelayout.spi.EdgeLayoutBuilder;
import org.gephi.fdeb.FDEBLayoutData;
import org.gephi.fdeb.utils.FDEBUtilities;
import org.gephi.graph.api.Edge;
import org.gephi.utils.longtask.spi.LongTask;
import org.openide.awt.StatusDisplayer;
import org.openide.util.NbBundle;

/**
 *
 * @author Taras Klaskovsky <megaterik@gmail.com>
 */
public class FDEBBundler extends FDEBAbstractBundler implements EdgeLayout, LongTask {

    public FDEBBundler(EdgeLayoutBuilder layoutBuilder) {
        super(layoutBuilder);
    }
    private long startTime;
    private long endTime;
    /*
     * Get parameters and init structures
     */

    @Override
    public void initAlgo() {
        cancel = false;
        startTime = System.currentTimeMillis();
        for (Edge edge : graphModel.getGraph().getEdges().toArray()) {
            edge.getEdgeData().setLayoutData(
                    new FDEBLayoutData(edge.getSource().getNodeData().x(), edge.getSource().getNodeData().y(),
                    edge.getTarget().getNodeData().x(), edge.getTarget().getNodeData().y()));
        }
        cycle = 1;
        setConverged(false);
        subdivisionPointsPerEdge = 1;//start and end doesnt count
        stepSize = stepSizeAtTheBeginning;
        iterationsPerCycle = iterationsPerCycleAtTheBeginning;
        progress = 0;
        if (progressTicket != null) {
            progressTicket.switchToDeterminate(calculateSumOfIterations(iterationsPerCycle, numCycles, iterationIncreaseRate, subdivisionPointsPerEdge, subdivisionPointIncreaseRate));
        }
        createCompatibilityLists();
    }
    private int progress;

    @Override
    public void goAlgo() {
        if (cancel) {
            return;
        }
        for (int step = 0; step < iterationsPerCycle; step++) {
            if (progressTicket != null) {
                progress += (int) subdivisionPointsPerEdge;
                progressTicket.progress(progress);
            }
            for (Edge edge : graphModel.getGraph().getEdges().toArray()) {
                if (cancel) {
                    return;
                }
                ((FDEBLayoutData) edge.getEdgeData().getLayoutData()).newSubdivisionPoints = Arrays.copyOf(((FDEBLayoutData) edge.getEdgeData().getLayoutData()).subdivisionPoints,
                        ((FDEBLayoutData) edge.getEdgeData().getLayoutData()).subdivisionPoints.length);
            }

            for (Edge edge : graphModel.getGraph().getEdges().toArray()) {
                if (cancel) {
                    return;
                }
                if (!useLowMemoryMode) {
                    FDEBUtilities.updateNewSubdivisionPoints(edge, springConstant, stepSize, useInverseQuadraticModel);
                } else {
                    FDEBUtilities.updateNewSubdivisionPointsInLowMemoryMode(edge, springConstant, stepSize, useInverseQuadraticModel,
                            graphModel.getGraph(), computator, compatibilityThreshold);
                }
            }

            for (Edge edge : graphModel.getGraph().getEdges().toArray()) {
                ((FDEBLayoutData) edge.getEdgeData().getLayoutData()).subdivisionPoints = ((FDEBLayoutData) edge.getEdgeData().getLayoutData()).newSubdivisionPoints;
                ((FDEBLayoutData) edge.getEdgeData().getLayoutData()).newSubdivisionPoints = null;
            }

            if (cancel) {
                return;
            }
        }

        try {
            StatusDisplayer.getDefault().setStatusText(NbBundle.getMessage(FDEBBundler.class, "after_iteration_message", cycle, numCycles));
        } catch (NoClassDefFoundError er) {
            ;  //running in the toolkit mode, do nothing
        }
        if (cycle == numCycles) {
            setConverged(true);
            endTime = System.currentTimeMillis();
            // System.err.println(endTime - startTime + " execution time");
        } else {
            prepareForTheNextStep();
        }
    }

    void prepareForTheNextStep() {
        cycle++;
        stepSize *= (1.0 - stepDampingFactor);
        iterationsPerCycle = (iterationsPerCycle * iterationIncreaseRate);
        divideEdges();
    }

    void divideEdges() {
        subdivisionPointsPerEdge *= subdivisionPointIncreaseRate;
        for (Edge edge : graphModel.getGraph().getEdges().toArray()) {
            FDEBUtilities.divideEdge(edge, subdivisionPointsPerEdge);
        }
    }
}