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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) 2015
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 org.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.data.Clustering;
import de.lmu.ifi.dbs.elki.result.EvaluationResult;
import de.lmu.ifi.dbs.elki.result.Result;
import de.lmu.ifi.dbs.elki.utilities.FormatUtil;
import de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy.Hierarchy;
import de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy.Hierarchy.Iter;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.VisualizationTree;
import de.lmu.ifi.dbs.elki.visualization.VisualizerContext;
import de.lmu.ifi.dbs.elki.visualization.gui.VisualizationPlot;
import de.lmu.ifi.dbs.elki.visualization.projections.Projection;
import de.lmu.ifi.dbs.elki.visualization.style.ClusterStylingPolicy;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.style.StylingPolicy;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGPlot;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGScoreBar;
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.StaticVisualizationInstance;
import de.lmu.ifi.dbs.elki.visualization.visualizers.Visualization;
/**
* Pseudo-Visualizer, that lists the cluster evaluation results found.
*
* TODO: add indication/warning when values are out-of-bounds.
*
* TODO: Find a nicer solution than the current hack to only display the
* evaluation results for the currently active clustering.
*
* @author Erich Schubert
* @author Sascha Goldhofer
*
* @apiviz.stereotype factory
* @apiviz.uses StaticVisualizationInstance oneway - - «create»
* @apiviz.has EvaluationResult oneway - - visualizes
*/
public class EvaluationVisualization extends AbstractVisFactory {
/**
* Name for this visualizer.
*/
private static final String NAME = "Evaluation Bar Chart";
/**
* Constant: width of score bars
*/
private static final double BARLENGTH = 5;
/**
* Constant: height of score bars
*/
private static final double BARHEIGHT = 0.7;
/**
* Constructor.
*/
public EvaluationVisualization() {
super();
}
@Override
public void processNewResult(VisualizerContext context, Object start) {
Hierarchy.Iter<EvaluationResult> it = VisualizationTree.filterResults(context, start, EvaluationResult.class);
candidate: for(; it.valid(); it.advance()) {
EvaluationResult sr = it.get();
// Avoid duplicates:
Hierarchy.Iter<VisualizationTask> it2 = VisualizationTree.filter(context, sr, VisualizationTask.class);
for(; it2.valid(); it2.advance()) {
if(it2.get().getFactory() instanceof EvaluationVisualization) {
continue candidate;
}
}
// Hack: for clusterings, only show the currently visible clustering.
if(sr.visualizeSingleton()) {
Class<? extends EvaluationResult> c = sr.getClass();
// Ensure singleton.
Hierarchy.Iter<?> it3 = context.getVisHierarchy().iterChildren(context.getBaseResult());
for(; it3.valid(); it3.advance()) {
Object o = it3.get();
if(!(o instanceof VisualizationTask)) {
continue;
}
final VisualizationTask otask = (VisualizationTask) o;
if(otask.getFactory() instanceof EvaluationVisualization && otask.getResult() == c) {
continue candidate;
}
}
final VisualizationTask task = new VisualizationTask(NAME, context, c, null, EvaluationVisualization.this);
task.reqwidth = .5;
task.reqheight = sr.numLines() * .05;
task.level = VisualizationTask.LEVEL_STATIC;
task.addUpdateFlags(VisualizationTask.ON_STYLEPOLICY);
context.addVis(context.getBaseResult(), task);
continue candidate;
}
final VisualizationTask task = new VisualizationTask(NAME, context, sr, null, EvaluationVisualization.this);
task.reqwidth = .5;
task.reqheight = sr.numLines() * .05;
task.level = VisualizationTask.LEVEL_STATIC;
context.addVis(sr, task);
}
}
private double addBarChart(SVGPlot svgp, Element parent, double ypos, String label, double value, double minValue, double maxValue, double baseValue, boolean reversed) {
SVGScoreBar barchart = new SVGScoreBar();
barchart.setFill(value, baseValue == baseValue ? baseValue : minValue, maxValue);
barchart.setReversed(reversed);
barchart.showValues(FormatUtil.NF4);
barchart.addLabel(label);
parent.appendChild(barchart.build(svgp, 0.0, ypos, BARLENGTH, BARHEIGHT));
ypos += 1;
return ypos;
}
private double addHeader(SVGPlot svgp, Element parent, double ypos, String text) {
ypos += .5;
Element object = svgp.svgText(0, ypos + BARHEIGHT * 0.5, text);
object.setAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE, "font-size: 0.6; font-weight: bold");
parent.appendChild(object);
ypos += 1;
return ypos;
}
@Override
public Visualization makeVisualization(VisualizationTask task, VisualizationPlot plot, double width, double height, Projection proj) {
// TODO: make a utility class to wrap SVGPlot + parent layer + ypos.
// TODO: use CSSClass and StyleLibrary
double ypos = -.5; // Skip space before first header
Element parent = plot.svgElement(SVGConstants.SVG_G_TAG);
Object o = task.getResult();
EvaluationResult sr = null;
if(o instanceof EvaluationResult) {
sr = (EvaluationResult) o;
}
else if(o instanceof Class) {
// Use cluster evaluation of current style instead.
VisualizerContext context = task.getContext();
StylingPolicy spol = context.getStylingPolicy();
if(spol instanceof ClusterStylingPolicy) {
ClusterStylingPolicy cpol = (ClusterStylingPolicy) spol;
@SuppressWarnings("unchecked")
final Class<Object> c = (Class<Object>) o;
Iter<?> it = VisualizationTree.filterResults(context, cpol.getClustering(), c);
candidates: for(; it.valid(); it.advance()) {
// This could be attached to a child clustering, in which case we
// may end up displaying the wrong evaluation.
Iter<Result> it2 = context.getHierarchy().iterAncestors((EvaluationResult) it.get());
for(; it2.valid(); it2.advance()) {
if(it2.get() instanceof Clustering && it2.get() != cpol.getClustering()) {
continue candidates;
}
}
sr = (EvaluationResult) it.get();
break;
}
}
}
if(sr == null) {
return new StaticVisualizationInstance(task, plot, width, height, parent); // Failed.
}
for(String header : sr.getHeaderLines()) {
ypos = addHeader(plot, parent, ypos, header);
}
for(EvaluationResult.MeasurementGroup g : sr) {
ypos = addHeader(plot, parent, ypos, g.getName());
for(EvaluationResult.Measurement m : g) {
ypos = addBarChart(plot, parent, ypos, m.getName(), m.getVal(), m.getMin(), m.getMax(), m.getExp(), m.lowerIsBetter());
}
}
// scale vis
double cols = 10;
final StyleLibrary style = task.getContext().getStyleLibrary();
final double margin = style.getSize(StyleLibrary.MARGIN);
final String transform = SVGUtil.makeMarginTransform(width, height, cols, ypos, margin / StyleLibrary.SCALE);
SVGUtil.setAtt(parent, SVGConstants.SVG_TRANSFORM_ATTRIBUTE, transform);
return new StaticVisualizationInstance(task, plot, width, height, parent);
}
@Override
public boolean allowThumbnails(VisualizationTask task) {
// Don't use thumbnails
return false;
}
}
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