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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) 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 org.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
import de.lmu.ifi.dbs.elki.result.HierarchicalResult;
import de.lmu.ifi.dbs.elki.result.Result;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClass;
import de.lmu.ifi.dbs.elki.visualization.projections.Projection;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
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;
import de.lmu.ifi.dbs.elki.visualization.visualizers.VisualizationTask;
import de.lmu.ifi.dbs.elki.visualization.visualizers.VisualizerContext;
/**
* Trivial "visualizer" that displays a static label.
* The visualizer is meant to be used for dimension labels in the overview.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses StaticVisualization oneway - - «create»
*/
public class LabelVisFactory extends AbstractVisFactory {
/**
* The label to render
*/
private String label = "undefined";
/**
* Formal constructor, to satisfy Parameterizable API
*/
public LabelVisFactory() {
super();
}
/**
* The actually used constructor - with a static label.
*
* @param label Label to use
*/
public LabelVisFactory(String label) {
this();
this.label = label;
}
@SuppressWarnings("unused")
@Override
public void processNewResult(HierarchicalResult baseResult, Result newResult) {
// No auto discovery supported.
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
SVGPlot svgp = task.getPlot();
VisualizerContext context = task.getContext();
CSSClass cls = new CSSClass(svgp, "unmanaged");
StyleLibrary style = context.getStyleLibrary();
double fontsize = style.getTextSize("overview.labels") / StyleLibrary.SCALE;
cls.setStatement(SVGConstants.CSS_FONT_SIZE_PROPERTY, SVGUtil.fmt(fontsize));
cls.setStatement(SVGConstants.CSS_FILL_PROPERTY, style.getTextColor("overview.labels"));
cls.setStatement(SVGConstants.CSS_FONT_FAMILY_PROPERTY, style.getFontFamily("overview.labels"));
Element layer = svgp.svgText(task.getWidth() / 2, task.getHeight() / 2 + .35 * fontsize, this.label);
SVGUtil.setAtt(layer, SVGConstants.SVG_STYLE_ATTRIBUTE, cls.inlineCSS());
SVGUtil.setAtt(layer, SVGConstants.SVG_TEXT_ANCHOR_ATTRIBUTE, SVGConstants.SVG_MIDDLE_VALUE);
return new StaticVisualization(task, layer);
}
@Override
public boolean allowThumbnails(@SuppressWarnings("unused") VisualizationTask task) {
return false;
}
@Override
public Class<? extends Projection> getProjectionType() {
return null;
}
}
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