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package de.lmu.ifi.dbs.elki.visualization.visualizers.visunproj;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2011
Ludwig-Maximilians-Universität München
Lehr- und Forschungseinheit für Datenbanksysteme
ELKI Development Team
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
import java.util.Collection;
import java.util.List;
import org.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.data.Cluster;
import de.lmu.ifi.dbs.elki.data.Clustering;
import de.lmu.ifi.dbs.elki.data.model.OPTICSModel;
import de.lmu.ifi.dbs.elki.logging.Logging;
import de.lmu.ifi.dbs.elki.result.HierarchicalResult;
import de.lmu.ifi.dbs.elki.result.Result;
import de.lmu.ifi.dbs.elki.result.ResultUtil;
import de.lmu.ifi.dbs.elki.result.SelectionResult;
import de.lmu.ifi.dbs.elki.result.optics.ClusterOrderResult;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClass;
import de.lmu.ifi.dbs.elki.visualization.opticsplot.OPTICSPlot;
import de.lmu.ifi.dbs.elki.visualization.projections.Projection;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGUtil;
import de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisFactory;
import de.lmu.ifi.dbs.elki.visualization.visualizers.AbstractVisualization;
import de.lmu.ifi.dbs.elki.visualization.visualizers.Visualization;
import de.lmu.ifi.dbs.elki.visualization.visualizers.VisualizationTask;
/**
* Visualize the clusters and cluster hierarchy found by OPTICS on the OPTICS
* Plot.
*
* @author Erich Schubert
*
* @apiviz.uses ClusterOrderResult
* @apiviz.uses OPTICSPlot
*/
public class OPTICSClusterVisualization extends AbstractVisualization {
/**
* The logger for this class.
*/
private static final Logging logger = Logging.getLogger(OPTICSClusterVisualization.class);
/**
* A short name characterizing this Visualizer.
*/
private static final String NAME = "OPTICS Cluster Range";
/**
* CSS class for markers
*/
protected static final String CSS_BRACKET = "opticsBracket";
/**
* Our cluster order
*/
private ClusterOrderResult<?> co;
/**
* Our clustering
*/
Clustering<OPTICSModel> clus;
/**
* The plot
*/
private OPTICSPlot<?> opticsplot;
/**
* Constructor.
*
* @param task Visualization task
*/
public OPTICSClusterVisualization(VisualizationTask task) {
super(task);
this.co = task.getResult();
this.clus = findOPTICSClustering(this.co);
this.opticsplot = OPTICSPlot.plotForClusterOrder(this.co, context);
context.addResultListener(this);
incrementalRedraw();
}
/**
* Find the OPTICS clustering child of a cluster order.
*
* @param co Cluster order
* @return OPTICS clustering
*/
@SuppressWarnings("unchecked")
protected static Clustering<OPTICSModel> findOPTICSClustering(ClusterOrderResult<?> co) {
for(Result r : co.getHierarchy().getChildren(co)) {
if(!Clustering.class.isInstance(r)) {
continue;
}
Clustering<?> clus = (Clustering<?>) r;
if(clus.getToplevelClusters().size() == 0) {
continue;
}
Cluster<?> firstcluster = clus.getToplevelClusters().iterator().next();
if(firstcluster.getModel() instanceof OPTICSModel) {
return (Clustering<OPTICSModel>) clus;
}
}
return null;
}
@Override
protected void redraw() {
final double scale = StyleLibrary.SCALE;
final double sizex = scale;
final double sizey = scale * task.getHeight() / task.getWidth();
final double margin = context.getStyleLibrary().getSize(StyleLibrary.MARGIN);
layer = SVGUtil.svgElement(svgp.getDocument(), SVGConstants.SVG_G_TAG);
final String transform = SVGUtil.makeMarginTransform(task.getWidth(), task.getHeight(), sizex, sizey, margin);
SVGUtil.setAtt(layer, SVGConstants.SVG_TRANSFORM_ATTRIBUTE, transform);
addCSSClasses();
drawClusters(scale, scale / opticsplot.getRatio(), clus.getToplevelClusters(), 1);
}
/**
* Recursively draw clusters
*
* @param sizex Width
* @param sizey Height of optics plot
* @param clusters Current set of clusters
* @param depth Recursion depth
*/
private void drawClusters(double sizex, double sizey, List<Cluster<OPTICSModel>> clusters, int depth) {
final double scale = StyleLibrary.SCALE;
for(Cluster<OPTICSModel> cluster : clusters) {
try {
OPTICSModel model = cluster.getModel();
final double x1 = sizex * ((model.getStartIndex() + .25) / this.co.getClusterOrder().size());
final double x2 = sizex * ((model.getEndIndex() + .75) / this.co.getClusterOrder().size());
final double y = sizey + depth * scale * 0.01;
Element e = svgp.svgLine(x1, y, x2, y);
SVGUtil.addCSSClass(e, CSS_BRACKET);
layer.appendChild(e);
}
catch(ClassCastException e) {
logger.warning("Expected OPTICSModel, got: " + cluster.getModel().getClass().getSimpleName());
}
// Descend
final List<Cluster<OPTICSModel>> children = cluster.getChildren();
if(children != null) {
drawClusters(sizex, sizey, children, depth + 1);
}
}
}
/**
* Adds the required CSS-Classes
*/
private void addCSSClasses() {
// Class for the markers
if(!svgp.getCSSClassManager().contains(CSS_BRACKET)) {
final CSSClass cls = new CSSClass(this, CSS_BRACKET);
cls.setStatement(SVGConstants.CSS_STROKE_PROPERTY, context.getStyleLibrary().getColor(StyleLibrary.PLOT));
cls.setStatement(SVGConstants.CSS_STROKE_WIDTH_PROPERTY, context.getStyleLibrary().getLineWidth(StyleLibrary.PLOT));
svgp.addCSSClassOrLogError(cls);
}
}
@Override
public void resultChanged(Result current) {
if(current instanceof SelectionResult || current == co || current == opticsplot) {
synchronizedRedraw();
return;
}
super.resultChanged(current);
}
/**
* Factory class for OPTICS plot selections.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses OPTICSPlotSelectionVisualization oneway - - «create»
*/
public static class Factory extends AbstractVisFactory {
/**
* Constructor, adhering to
* {@link de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable}
*/
public Factory() {
super();
}
@Override
public void processNewResult(HierarchicalResult baseResult, Result result) {
Collection<OPTICSPlot<?>> plots = ResultUtil.filterResults(result, OPTICSPlot.class);
for(OPTICSPlot<?> plot : plots) {
ClusterOrderResult<?> co = plot.getClusterOrder();
final VisualizationTask task = new VisualizationTask(NAME, co, null, this, plot);
task.put(VisualizationTask.META_LEVEL, VisualizationTask.LEVEL_INTERACTIVE);
baseResult.getHierarchy().add(plot, task);
}
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
return new OPTICSClusterVisualization(task);
}
@Override
public boolean allowThumbnails(@SuppressWarnings("unused") VisualizationTask task) {
// Don't use thumbnails
return false;
}
@Override
public Class<? extends Projection> getProjectionType() {
return null;
}
}
}
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