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package de.lmu.ifi.dbs.elki.visualization.svg;
/*
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 java.text.NumberFormat;
import org.apache.batik.util.SVGConstants;
import org.w3c.dom.Element;
/**
* Draw a score bar. Essentially like a progress bar, left-to-right, displaying
* a relative score.
*
* @author Sascha Goldhofer
*/
// TODO: refactor to get a progress bar?
public class SVGScoreBar {
/**
* Value, minimum and maximum values
*/
protected double val, min = 0., max = 1.;
/**
* Reversed flag.
*/
protected boolean reversed = false;
/**
* Label (on the right)
*/
protected String label = null;
/**
* Number format, set to print the actual score
*/
private NumberFormat format = null;
/**
* Constructor.
*/
public SVGScoreBar() {
// Nothing to do here.
}
/**
* Set the fill of the score bar.
*
* @param val Value
* @param min Minimum value
* @param max Maximum value
*/
public void setFill(double val, double min, double max) {
this.val = val;
this.min = min;
this.max = max;
}
/**
* Set the reversed flag.
*
* @param reversed Reversed flag.
*/
public void setReversed(boolean reversed) {
this.reversed = reversed;
}
/**
* Set label (right of the bar)
*
* @param text Label text
*/
public void addLabel(String text) {
this.label = text;
}
/**
* To show score values, set a number format
*
* @param format Number format
*/
public void showValues(NumberFormat format) {
this.format = format;
}
/**
* Build the actual element
*
* @param svgp Plot to draw to
* @param x X coordinate
* @param y Y coordinate
* @param width Width
* @param height Height
* @return new element
*/
public Element build(SVGPlot svgp, double x, double y, double width, double height) {
Element barchart = svgp.svgElement(SVGConstants.SVG_G_TAG);
// TODO: use style library for colors!
Element bar = svgp.svgRect(x, y, width, height);
bar.setAttribute(SVGConstants.SVG_FILL_ATTRIBUTE, "#a0a0a0");
bar.setAttribute(SVGConstants.SVG_STROKE_ATTRIBUTE, "#a0a0a0");
bar.setAttribute(SVGConstants.SVG_STROKE_WIDTH_ATTRIBUTE, String.valueOf(height * 0.01));
barchart.appendChild(bar);
if(val >= min && val <= max && min < max) {
final double frame = 0.02 * height;
double fpos = (val - min) / (max - min) * (width - 2 * frame);
Element chart;
if(reversed) {
chart = svgp.svgRect(x + frame + fpos, y + frame, width - fpos - 2 * frame, height - 2 * frame);
}
else {
chart = svgp.svgRect(x + frame, y + frame, fpos, height - 2 * frame);
}
chart.setAttribute(SVGConstants.SVG_FILL_ATTRIBUTE, "#d4e4f1");
chart.setAttribute(SVGConstants.SVG_STROKE_ATTRIBUTE, "#a0a0a0");
chart.setAttribute(SVGConstants.SVG_STROKE_WIDTH_ATTRIBUTE, String.valueOf(height * 0.01));
barchart.appendChild(chart);
}
// Draw the values:
if(format != null) {
String num = Double.isNaN(val) ? "NaN" : format.format(val);
Element lbl = svgp.svgText(x + 0.05 * width, y + 0.75 * height, num);
lbl.setAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE, "font-size: " + 0.75 * height + "; font-weight: bold");
barchart.appendChild(lbl);
}
// Draw the label
if(label != null) {
Element lbl = svgp.svgText(x + 1.05 * width, y + 0.75 * height, label);
lbl.setAttribute(SVGConstants.SVG_STYLE_ATTRIBUTE, "font-size: " + 0.75 * height + "; font-weight: normal");
barchart.appendChild(lbl);
}
return barchart;
}
}
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