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package de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.cluster;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
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 org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreListener;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.distance.distancevalue.DoubleDistance;
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.optics.ClusterOrderEntry;
import de.lmu.ifi.dbs.elki.result.optics.ClusterOrderResult;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClass;
import de.lmu.ifi.dbs.elki.visualization.projector.ScatterPlotProjector;
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.Visualization;
import de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot.AbstractScatterplotVisualization;
/**
* Cluster order visualizer: connect objects via the spanning tree the cluster
* order represents.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses Instance oneway - - «create»
*/
public class ClusterOrderVisualization extends AbstractVisFactory {
/**
* A short name characterizing this Visualizer.
*/
private static final String NAME = "Predecessor Graph";
/**
* Constructor, adhering to
* {@link de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable}
*/
public ClusterOrderVisualization() {
super();
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
return new Instance(task);
}
@Override
public void processNewResult(HierarchicalResult baseResult, Result result) {
Collection<ClusterOrderResult<DoubleDistance>> cos = ResultUtil.filterResults(result, ClusterOrderResult.class);
for(ClusterOrderResult<DoubleDistance> co : cos) {
Collection<ScatterPlotProjector<?>> ps = ResultUtil.filterResults(baseResult, ScatterPlotProjector.class);
for(ScatterPlotProjector<?> p : ps) {
final VisualizationTask task = new VisualizationTask(NAME, co, p.getRelation(), this);
task.initDefaultVisibility(false);
task.level = VisualizationTask.LEVEL_DATA - 1;
baseResult.getHierarchy().add(co, task);
baseResult.getHierarchy().add(p, task);
}
}
}
/**
* Instance
*
* @author Erich Schubert
*
* @apiviz.has ClusterOrderResult oneway - - visualizes
*/
// TODO: listen for CLUSTER ORDER changes.
public class Instance extends AbstractScatterplotVisualization implements DataStoreListener {
/**
* CSS class name
*/
private static final String CSSNAME = "predecessor";
/**
* The result we visualize
*/
protected ClusterOrderResult<?> result;
public Instance(VisualizationTask task) {
super(task);
result = task.getResult();
context.addDataStoreListener(this);
incrementalRedraw();
}
@Override
public void destroy() {
super.destroy();
context.removeDataStoreListener(this);
}
@Override
public void redraw() {
final StyleLibrary style = context.getStyleResult().getStyleLibrary();
CSSClass cls = new CSSClass(this, CSSNAME);
style.lines().formatCSSClass(cls, 0, style.getLineWidth(StyleLibrary.CLUSTERORDER));
svgp.addCSSClassOrLogError(cls);
for(ClusterOrderEntry<?> ce : result) {
DBID thisId = ce.getID();
DBID prevId = ce.getPredecessorID();
if(thisId == null || prevId == null) {
continue;
}
double[] thisVec = proj.fastProjectDataToRenderSpace(rel.get(thisId));
double[] prevVec = proj.fastProjectDataToRenderSpace(rel.get(prevId));
// FIXME: DO NOT COMMIT
thisVec[0] = thisVec[0] * 0.95 + prevVec[0] * 0.05;
thisVec[1] = thisVec[1] * 0.95 + prevVec[1] * 0.05;
Element arrow = svgp.svgLine(prevVec[0], prevVec[1], thisVec[0], thisVec[1]);
SVGUtil.setCSSClass(arrow, cls.getName());
layer.appendChild(arrow);
}
}
}
}
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