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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 java.awt.image.RenderedImage;
import java.util.Collection;
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.PixmapResult;
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.style.StyleLibrary;
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.AbstractVisualization;
import de.lmu.ifi.dbs.elki.visualization.visualizers.Visualization;
/**
* Visualize an arbitrary pixmap result.
*
* @author Erich Schubert
*
* @apiviz.has PixmapResult oneway - 1 visualizes
*/
public class PixmapVisualizer extends AbstractVisualization {
/**
* Name for this visualizer.
*/
private static final String NAME = "Pixmap Visualizer";
/**
* The actual pixmap result.
*/
private PixmapResult result;
/**
* Constructor.
*
* @param task Visualization task
*/
public PixmapVisualizer(VisualizationTask task) {
super(task);
this.result = task.getResult();
}
@Override
protected void redraw() {
// TODO: Use width, height, imgratio, number of OPTICS plots!
double scale = StyleLibrary.SCALE;
final double sizex = scale;
final double sizey = scale * task.getHeight() / task.getWidth();
final double margin = 0.0; // context.getStyleLibrary().getSize(StyleLibrary.MARGIN);
layer = SVGUtil.svgElement(svgp.getDocument(), SVGConstants.SVG_G_TAG);
final String transform = SVGUtil.makeMarginTransform(task.getWidth(), task.getHeight(), sizex, sizey, margin);
SVGUtil.setAtt(layer, SVGConstants.SVG_TRANSFORM_ATTRIBUTE, transform);
RenderedImage img = result.getImage();
// is ratio, target ratio
double iratio = img.getHeight() / img.getWidth();
double tratio = task.getHeight() / task.getWidth();
// We want to place a (iratio, 1.0) object on a (tratio, 1.0) screen.
// Both dimensions must fit:
double zoom = (iratio >= tratio) ? Math.min(tratio / iratio, 1.0) : Math.max(iratio / tratio, 1.0);
Element itag = svgp.svgElement(SVGConstants.SVG_IMAGE_TAG);
SVGUtil.setAtt(itag, SVGConstants.SVG_IMAGE_RENDERING_ATTRIBUTE, SVGConstants.SVG_OPTIMIZE_SPEED_VALUE);
SVGUtil.setAtt(itag, SVGConstants.SVG_X_ATTRIBUTE, 0);
SVGUtil.setAtt(itag, SVGConstants.SVG_Y_ATTRIBUTE, 0);
SVGUtil.setAtt(itag, SVGConstants.SVG_WIDTH_ATTRIBUTE, scale * zoom * iratio);
SVGUtil.setAtt(itag, SVGConstants.SVG_HEIGHT_ATTRIBUTE, scale * zoom);
itag.setAttributeNS(SVGConstants.XLINK_NAMESPACE_URI, SVGConstants.XLINK_HREF_QNAME, result.getAsFile().toURI().toString());
layer.appendChild(itag);
}
/**
* Factory class for pixmap visualizers.
*
* @author Erich Schubert
*
* @apiviz.stereotype factory
* @apiviz.uses PixmapVisualizer oneway - - «create»
*/
public static class Factory extends AbstractVisFactory {
/**
* Constructor, adhering to
* {@link de.lmu.ifi.dbs.elki.utilities.optionhandling.Parameterizable}
*/
public Factory() {
super();
}
@Override
public void processNewResult(HierarchicalResult baseResult, Result result) {
Collection<PixmapResult> prs = ResultUtil.filterResults(result, PixmapResult.class);
for(PixmapResult pr : prs) {
// Add plots, attach visualizer
final VisualizationTask task = new VisualizationTask(NAME, pr, null, this);
task.width = pr.getImage().getWidth() / pr.getImage().getHeight();
task.height = 1.0;
task.put(VisualizationTask.META_LEVEL, VisualizationTask.LEVEL_STATIC);
baseResult.getHierarchy().add(pr, task);
}
}
@Override
public Visualization makeVisualization(VisualizationTask task) {
return new PixmapVisualizer(task);
}
@Override
public boolean allowThumbnails(VisualizationTask task) {
// Don't use thumbnails
return false;
}
}
}
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