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package de.lmu.ifi.dbs.elki.visualization.visualizers.parallel.selection;
/*
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.NumberVector;
import de.lmu.ifi.dbs.elki.data.type.TypeUtil;
import de.lmu.ifi.dbs.elki.database.datastore.DataStoreListener;
import de.lmu.ifi.dbs.elki.database.ids.DBIDIter;
import de.lmu.ifi.dbs.elki.database.ids.DBIDRef;
import de.lmu.ifi.dbs.elki.database.ids.DBIDs;
import de.lmu.ifi.dbs.elki.database.relation.Relation;
import de.lmu.ifi.dbs.elki.result.DBIDSelection;
import de.lmu.ifi.dbs.elki.utilities.datastructures.hierarchy.Hierarchy;
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.css.CSSClass;
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.projector.ParallelPlotProjector;
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.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.Visualization;
import de.lmu.ifi.dbs.elki.visualization.visualizers.parallel.AbstractParallelVisualization;
/**
* Visualizer for generating SVG-Elements representing the selected objects
*
* @author Robert Rödler
* @since 0.5.0
*
* @apiviz.stereotype factory
* @apiviz.uses Instance oneway - - «create»
*/
public class SelectionLineVisualization extends AbstractVisFactory {
/**
* A short name characterizing this Visualizer.
*/
public static final String NAME = "Selection Line";
/**
* Constructor.
*/
public SelectionLineVisualization() {
super();
}
@Override
public Visualization makeVisualization(VisualizationTask task, VisualizationPlot plot, double width, double height, Projection proj) {
return new Instance(task, plot, width, height, proj);
}
@Override
public void processNewResult(VisualizerContext context, Object start) {
Hierarchy.Iter<ParallelPlotProjector<?>> it = VisualizationTree.filter(context, start, ParallelPlotProjector.class);
for(; it.valid(); it.advance()) {
ParallelPlotProjector<?> p = it.get();
Relation<?> rel = p.getRelation();
if(!TypeUtil.NUMBER_VECTOR_FIELD.isAssignableFromType(rel.getDataTypeInformation())) {
continue;
}
final VisualizationTask task = new VisualizationTask(NAME, context, context.getSelectionResult(), rel, SelectionLineVisualization.this);
task.level = VisualizationTask.LEVEL_DATA - 1;
task.addUpdateFlags(VisualizationTask.ON_DATA | VisualizationTask.ON_SELECTION);
context.addVis(context.getSelectionResult(), task);
context.addVis(p, task);
}
}
/**
* Instance
*
* @author Robert Rödler
*
* @apiviz.has DBIDSelection oneway - - visualizes
*/
public class Instance extends AbstractParallelVisualization<NumberVector>implements DataStoreListener {
/**
* CSS Class for the range marker
*/
public static final String MARKER = "SelectionLine";
/**
* Constructor.
*
* @param task Visualization task
* @param plot Plot to draw to
* @param width Embedding width
* @param height Embedding height
* @param proj Projection
*/
public Instance(VisualizationTask task, VisualizationPlot plot, double width, double height, Projection proj) {
super(task, plot, width, height, proj);
addListeners();
}
@Override
public void fullRedraw() {
super.fullRedraw();
addCSSClasses(svgp);
DBIDSelection selContext = context.getSelection();
if(selContext != null) {
DBIDs selection = selContext.getSelectedIds();
for(DBIDIter iter = selection.iter(); iter.valid(); iter.advance()) {
Element marker = drawLine(iter);
if(marker == null) {
continue;
}
SVGUtil.addCSSClass(marker, MARKER);
layer.appendChild(marker);
}
}
}
/**
* Draw a single line.
*
* @param iter Object reference
* @return SVG Element
*/
private Element drawLine(DBIDRef iter) {
SVGPath path = new SVGPath();
double[] yPos = proj.fastProjectDataToRenderSpace(relation.get(iter));
boolean draw = false, drawprev = false, drawn = false;
for(int i = 0; i < yPos.length; i++) {
// NaN handling:
if(yPos[i] != yPos[i]) {
draw = false;
drawprev = false;
continue;
}
if(draw) {
if(drawprev) {
path.moveTo(getVisibleAxisX(i - 1), yPos[i - 1]);
drawprev = false;
}
path.lineTo(getVisibleAxisX(i), yPos[i]);
drawn = true;
}
else {
drawprev = true;
}
draw = true;
}
if(!drawn) {
return null; // Not enough data.
}
return path.makeElement(svgp);
}
/**
* Adds the required CSS-Classes
*
* @param svgp SVG-Plot
*/
private void addCSSClasses(SVGPlot svgp) {
final StyleLibrary style = context.getStyleLibrary();
// Class for the cube
if(!svgp.getCSSClassManager().contains(MARKER)) {
CSSClass cls = new CSSClass(this, MARKER);
cls.setStatement(SVGConstants.CSS_STROKE_VALUE, style.getColor(StyleLibrary.SELECTION));
cls.setStatement(SVGConstants.CSS_STROKE_OPACITY_PROPERTY, style.getOpacity(StyleLibrary.SELECTION));
cls.setStatement(SVGConstants.CSS_STROKE_WIDTH_PROPERTY, style.getLineWidth(StyleLibrary.PLOT) * 2.);
cls.setStatement(SVGConstants.CSS_STROKE_LINECAP_PROPERTY, SVGConstants.CSS_ROUND_VALUE);
cls.setStatement(SVGConstants.CSS_STROKE_LINEJOIN_PROPERTY, SVGConstants.CSS_ROUND_VALUE);
cls.setStatement(SVGConstants.CSS_FILL_PROPERTY, SVGConstants.CSS_NONE_VALUE);
svgp.addCSSClassOrLogError(cls);
}
}
}
}
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