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package de.lmu.ifi.dbs.elki.visualization.visualizers.vis2d;
/*
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.ArrayList;
import java.util.Iterator;
import org.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.data.DoubleVector;
import de.lmu.ifi.dbs.elki.data.NumberVector;
import de.lmu.ifi.dbs.elki.data.spatial.Polygon;
import de.lmu.ifi.dbs.elki.data.spatial.PolygonsObject;
import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreEvent;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreListener;
import de.lmu.ifi.dbs.elki.database.ids.DBID;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.math.linearalgebra.Vector;
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.DatabaseUtil;
import de.lmu.ifi.dbs.elki.utilities.exceptions.ObjectNotFoundException;
import de.lmu.ifi.dbs.elki.utilities.iterator.IterableUtil;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClass;
import de.lmu.ifi.dbs.elki.visualization.projections.Projection2D;
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.SVGPath;
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;
/**
* Renders PolygonsObject in the data set.
*
* @author Erich Schubert
*
* @apiviz.has PolygonsObject - - visualizes
*/
public class PolygonVisualization<V extends NumberVector<?, ?>> extends P2DVisualization<V> implements DataStoreListener {
/**
* A short name characterizing this Visualizer.
*/
private static final String NAME = "Polygons";
/**
* Generic tag to indicate the type of element. Used in IDs, CSS-Classes etc.
*/
public static final String POLYS = "polys";
/**
* The current projection
*/
final protected Projection2D proj;
/**
* The representation we visualize
*/
final protected Relation<PolygonsObject> rep;
/**
* Constructor.
*
* @param task Task to visualize
*/
public PolygonVisualization(VisualizationTask task) {
super(task);
this.proj = task.getProj();
this.rep = task.getResult(); // Note: relation was used for projection
context.addDataStoreListener(this);
incrementalRedraw();
}
@Override
public void destroy() {
super.destroy();
context.removeDataStoreListener(this);
}
@Override
public void redraw() {
CSSClass css = new CSSClass(svgp, POLYS);
// TODO: separate fill and line colors?
css.setStatement(SVGConstants.CSS_STROKE_WIDTH_PROPERTY, context.getStyleLibrary().getLineWidth(StyleLibrary.POLYGONS));
css.setStatement(SVGConstants.CSS_STROKE_PROPERTY, context.getStyleLibrary().getColor(StyleLibrary.POLYGONS));
css.setStatement(SVGConstants.CSS_FILL_PROPERTY, SVGConstants.CSS_NONE_VALUE);
svgp.addCSSClassOrLogError(css);
svgp.updateStyleElement();
// draw data
for(DBID id : rep.iterDBIDs()) {
try {
PolygonsObject poly = rep.get(id);
if(poly == null) {
continue;
}
SVGPath path = new SVGPath();
for(Polygon ppoly : poly.getPolygons()) {
Vector first = ppoly.get(0);
double[] f = proj.fastProjectDataToRenderSpace(first);
path.moveTo(f[0], f[1]);
for(Vector v : ppoly) {
if(v == first) {
continue;
}
double[] p = proj.fastProjectDataToRenderSpace(v);
path.drawTo(p[0], p[1]);
}
// close path.
path.drawTo(f[0], f[1]);
}
Element e = path.makeElement(svgp);
SVGUtil.addCSSClass(e, POLYS);
layer.appendChild(e);
}
catch(ObjectNotFoundException e) {
// ignore.
}
}
}
@Override
public void contentChanged(DataStoreEvent e) {
synchronizedRedraw();
}
/**
* The visualization factory
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses PolygonVisualization oneway - - «create»
*/
public static class Factory extends AbstractVisFactory {
/**
* Constructor
*/
public Factory() {
super();
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
return new PolygonVisualization<DoubleVector>(task);
}
@Override
public void processNewResult(HierarchicalResult baseResult, Result result) {
ArrayList<Relation<?>> results = ResultUtil.filterResults(result, Relation.class);
for(Relation<?> rel : results) {
if(TypeUtil.POLYGON_TYPE.isAssignableFromType(rel.getDataTypeInformation())) {
// Assume that a 2d projector is using the same coordinates as the polygons.
Iterator<ScatterPlotProjector<?>> ps = ResultUtil.filteredResults(baseResult, ScatterPlotProjector.class);
for(ScatterPlotProjector<?> p : IterableUtil.fromIterator(ps)) {
if(DatabaseUtil.dimensionality(p.getRelation()) == 2) {
final VisualizationTask task = new VisualizationTask(NAME, rel, p.getRelation(), this);
task.put(VisualizationTask.META_LEVEL, VisualizationTask.LEVEL_DATA - 10);
baseResult.getHierarchy().add(rel, task);
baseResult.getHierarchy().add(p, task);
}
}
}
}
}
}
}
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