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.Model;
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.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.VisualizerContext;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.style.marker.MarkerLibrary;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGPlot;
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.StaticVisualization;
import de.lmu.ifi.dbs.elki.visualization.visualizers.Visualization;
/**
* Pseudo-Visualizer, that gives the key for a clustering.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses StaticVisualization oneway - - «create»
* @apiviz.has Clustering oneway - - visualizes
*/
public class KeyVisFactory extends AbstractVisFactory {
/**
* Name for this visualizer.
*/
private static final String NAME = "Cluster Key";
/**
* Constructor, adhering to
* {@link de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable}
*/
public KeyVisFactory() {
super();
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
Clustering<Model> clustering = task.getResult();
SVGPlot svgp = task.getPlot();
VisualizerContext context = task.getContext();
final List<Cluster<Model>> allcs = clustering.getAllClusters();
int numc = allcs.size();
// FIXME: Use CSS and style library.
Element layer = svgp.svgElement(SVGConstants.SVG_G_TAG);
MarkerLibrary ml = context.getStyleLibrary().markers();
int i = 0;
for(Cluster<Model> c : allcs) {
ml.useMarker(svgp, layer, 0.3, i + 0.5, i, 0.3);
Element label = svgp.svgText(0.7, i + 0.7, c.getNameAutomatic());
label.setAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE, "font-size: 0.6");
layer.appendChild(label);
i++;
}
int cols = Math.max(6, (int) (numc * task.getHeight() / task.getWidth()));
int rows = numc;
final double margin = context.getStyleLibrary().getSize(StyleLibrary.MARGIN);
final String transform = SVGUtil.makeMarginTransform(task.getWidth(), task.getHeight(), cols, rows, margin / StyleLibrary.SCALE);
SVGUtil.setAtt(layer, SVGConstants.SVG_TRANSFORM_ATTRIBUTE, transform);
return new StaticVisualization(task, layer);
}
@Override
public void processNewResult(HierarchicalResult baseResult, Result newResult) {
// Find clusterings we can visualize:
Collection<Clustering<?>> clusterings = ResultUtil.filterResults(newResult, Clustering.class);
for(Clustering<?> c : clusterings) {
if(c.getAllClusters().size() > 0) {
final VisualizationTask task = new VisualizationTask(NAME, c, null, this);
task.width = 1.0;
task.height = 1.0;
task.put(VisualizationTask.META_LEVEL, VisualizationTask.LEVEL_STATIC);
baseResult.getHierarchy().add(c, task);
}
}
}
@Override
public boolean allowThumbnails(VisualizationTask task) {
return false;
}
}