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package de.lmu.ifi.dbs.elki.visualization.style.lines;
/*
This file is part of ELKI:
Environment for Developing KDD-Applications Supported by Index-Structures
Copyright (C) 2012
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.CSSConstants;
import de.lmu.ifi.dbs.elki.visualization.colors.ColorLibrary;
import de.lmu.ifi.dbs.elki.visualization.css.CSSClass;
import de.lmu.ifi.dbs.elki.visualization.style.StyleLibrary;
import de.lmu.ifi.dbs.elki.visualization.svg.SVGUtil;
/**
* Line library using various dashed and dotted line styles.
*
* This library is particularly useful for black and white output.
*
* {@link LineStyleLibrary#FLAG_STRONG} will result in thicker lines.
*
* {@link LineStyleLibrary#FLAG_WEAK} will result in thinner and
* semi-transparent lines.
*
* {@link LineStyleLibrary#FLAG_INTERPOLATED} will result in shorter dashing
* patterns.
*
* @author Erich Schubert
*
* @apiviz.composedOf ColorLibrary
*/
public class DashedLineStyleLibrary implements LineStyleLibrary {
/**
* The style library we use for colors
*/
private ColorLibrary colors;
/** Dash patterns to regularly use */
private double[][] dashpatterns = {
// solid, no dashing
{},
// half-half
{ .5, .5 },
// quarters
{ .25, .25, .25, .25 },
// alternating long-quart
{ .75, .25 },
// dash-dot
{ .7, .1, .1, .1 }, };
/** Replacement for the solid pattern in 'interpolated' mode */
private double[] solidreplacement = { .1, .1 };
private int dashnum = dashpatterns.length;
/**
* Color of "uncolored" dots
*/
private String dotcolor;
/**
* Color of "greyed out" dots
*/
private String greycolor;
/**
* Constructor
*
* @param style Style library
*/
public DashedLineStyleLibrary(StyleLibrary style) {
super();
this.colors = style.getColorSet(StyleLibrary.PLOT);
this.dotcolor = style.getColor(StyleLibrary.MARKERPLOT);
this.greycolor = style.getColor(StyleLibrary.PLOTGREY);
}
@Override
public void formatCSSClass(CSSClass cls, int style, double width, Object... flags) {
if(style == -2) {
cls.setStatement(CSSConstants.CSS_STROKE_PROPERTY, greycolor);
}
else if(style == -1) {
cls.setStatement(CSSConstants.CSS_STROKE_PROPERTY, dotcolor);
}
else {
cls.setStatement(CSSConstants.CSS_STROKE_PROPERTY, colors.getColor(style));
}
boolean interpolated = false;
// process flavoring flags
for(Object flag : flags) {
if(flag == LineStyleLibrary.FLAG_STRONG) {
width = width * 1.5;
}
else if(flag == LineStyleLibrary.FLAG_WEAK) {
cls.setStatement(CSSConstants.CSS_STROKE_OPACITY_PROPERTY, ".50");
width = width * 0.75;
}
else if(flag == LineStyleLibrary.FLAG_INTERPOLATED) {
interpolated = true;
}
}
cls.setStatement(CSSConstants.CSS_STROKE_WIDTH_PROPERTY, SVGUtil.fmt(width));
// handle dashing
int styleflav = (style > 0) ? (style % dashnum) : (-style % dashnum);
if(!interpolated) {
double[] pat = dashpatterns[styleflav];
assert (pat.length % 2 == 0);
if(pat.length > 0) {
StringBuffer pattern = new StringBuffer();
for(int i = 0; i < pat.length; i++) {
if(i > 0) {
pattern.append(",");
}
pattern.append(SVGUtil.fmt(pat[i] * width * 30));
// pattern.append("%");
}
cls.setStatement(CSSConstants.CSS_STROKE_DASHARRAY_PROPERTY, pattern.toString());
}
}
else {
double[] pat = dashpatterns[styleflav];
if(styleflav == 0) {
pat = solidreplacement;
}
assert (pat.length % 2 == 0);
// TODO: add dotting.
if(pat.length > 0) {
StringBuffer pattern = new StringBuffer();
for(int i = 0; i < pat.length; i++) {
if(i > 0) {
pattern.append(",");
}
pattern.append(SVGUtil.fmt(pat[i] * width));
// pattern.append("%");
}
cls.setStatement(CSSConstants.CSS_STROKE_DASHARRAY_PROPERTY, pattern.toString());
}
}
}
}
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