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package de.lmu.ifi.dbs.elki.visualization.visualizers.scatterplot;
/*
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.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.data.NumberVector;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreListener;
import de.lmu.ifi.dbs.elki.database.ids.DBIDIter;
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.utilities.exceptions.ObjectNotFoundException;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.projector.ScatterPlotProjector;
import de.lmu.ifi.dbs.elki.visualization.style.ClassStylingPolicy;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.style.StyleResult;
import de.lmu.ifi.dbs.elki.visualization.style.StylingPolicy;
import de.lmu.ifi.dbs.elki.visualization.style.marker.MarkerLibrary;
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.thumbs.ThumbnailVisualization;
/**
* Visualize e.g. a clustering using different markers for different clusters.
* This visualizer is not constraint to clusters. It can in fact visualize any
* kind of result we have a style source for.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses Instance oneway - - «create»
*/
public class MarkerVisualization extends AbstractVisFactory {
/**
* A short name characterizing this Visualizer.
*/
private static final String NAME = "Markers";
/**
* Constructor, adhering to
* {@link de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable}
*/
public MarkerVisualization() {
super();
thumbmask |= ThumbnailVisualization.ON_DATA | ThumbnailVisualization.ON_STYLE;
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
return new Instance(task);
}
@Override
public void processNewResult(HierarchicalResult baseResult, Result result) {
// Find a style result to visualize:
Collection<StyleResult> styleres = ResultUtil.filterResults(result, StyleResult.class);
for(StyleResult c : styleres) {
Collection<ScatterPlotProjector<?>> ps = ResultUtil.filterResults(baseResult, ScatterPlotProjector.class);
for(ScatterPlotProjector<?> p : ps) {
final VisualizationTask task = new VisualizationTask(NAME, c, p.getRelation(), this);
task.level = VisualizationTask.LEVEL_DATA;
baseResult.getHierarchy().add(c, task);
baseResult.getHierarchy().add(p, task);
}
}
}
/**
* Instance.
*
* @author Erich Schubert
*
* @apiviz.uses StyleResult
*/
public class Instance extends AbstractScatterplotVisualization implements DataStoreListener {
/**
* Generic tag to indicate the type of element. Used in IDs, CSS-Classes
* etc.
*/
public static final String DOTMARKER = "dot";
/**
* The result we visualize
*/
private StyleResult style;
/**
* Constructor.
*
* @param task Visualization task
*/
public Instance(VisualizationTask task) {
super(task);
this.style = task.getResult();
context.addDataStoreListener(this);
context.addResultListener(this);
incrementalRedraw();
}
@Override
public void destroy() {
super.destroy();
context.removeDataStoreListener(this);
context.removeResultListener(this);
}
@Override
public void redraw() {
final MarkerLibrary ml = style.getStyleLibrary().markers();
final double marker_size = style.getStyleLibrary().getSize(StyleLibrary.MARKERPLOT);
final StylingPolicy spol = style.getStylingPolicy();
if(spol instanceof ClassStylingPolicy) {
ClassStylingPolicy cspol = (ClassStylingPolicy) spol;
for(int cnum = cspol.getMinStyle(); cnum < cspol.getMaxStyle(); cnum++) {
for(DBIDIter iter = cspol.iterateClass(cnum); iter.valid(); iter.advance()) {
if(!sample.getSample().contains(iter)) {
continue; // TODO: can we test more efficiently than this?
}
try {
final NumberVector<?> vec = rel.get(iter);
double[] v = proj.fastProjectDataToRenderSpace(vec);
ml.useMarker(svgp, layer, v[0], v[1], cnum, marker_size);
}
catch(ObjectNotFoundException e) {
// ignore.
}
}
}
}
else {
final String FILL = SVGConstants.CSS_FILL_PROPERTY + ":";
// Color-based styling. Fall back to dots
for(DBIDIter iter = sample.getSample().iter(); iter.valid(); iter.advance()) {
try {
double[] v = proj.fastProjectDataToRenderSpace(rel.get(iter));
Element dot = svgp.svgCircle(v[0], v[1], marker_size);
SVGUtil.addCSSClass(dot, DOTMARKER);
int col = spol.getColorForDBID(iter);
SVGUtil.setAtt(dot, SVGConstants.SVG_STYLE_ATTRIBUTE, FILL + SVGUtil.colorToString(col));
layer.appendChild(dot);
}
catch(ObjectNotFoundException e) {
// ignore.
}
}
}
}
}
}
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