Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/jfree/JFreeUtil.java @ 7119:988dde49ae65
Fix area label rendering.
Previously the showarealabel setting was neither parsed nor
used to decide if the arealabel should be drawn.
It is mostly off but enabled for Cross Sections. It is now
also shown in the style editors in case someone got used to it ;)
author | Andre Heinecke <aheinecke@intevation.de> |
---|---|
date | Tue, 24 Sep 2013 18:13:51 +0200 |
parents | 1b35b2ddfc28 |
children | e4606eae8ea5 |
line wrap: on
line source
/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.jfree; import java.awt.Shape; import java.awt.geom.Rectangle2D; import java.util.Iterator; import java.util.Random; import org.apache.log4j.Logger; import org.jfree.chart.entity.ChartEntity; import org.jfree.chart.entity.EntityCollection; import org.dive4elements.river.artifacts.math.Function; import org.dive4elements.river.themes.ThemeDocument; public class JFreeUtil { private static final Logger logger = Logger.getLogger(JFreeUtil.class); /** Do not instantiate. */ private JFreeUtil() { } /** * True if \param hotspot collides with a Entity in \param entities. * @param hotspot Shape to compare against other shapes (bounds only). * @param entities entities against which to compare shape. * @param exclusiveEntityClass If not null, consider only entities of * given class. * @return true if a collision (non-zero intersection) exists between * shapes. */ public static boolean collides(Shape hotspot, EntityCollection entities, Class exclusiveEntityClass) { if (entities == null) return false; Rectangle2D hotspotBox = hotspot.getBounds2D(); for (Iterator i = entities.iterator(); i.hasNext(); ) { Object next = i.next(); ChartEntity entity = (ChartEntity) next; if (exclusiveEntityClass == null || exclusiveEntityClass.isInstance(entity)) { if (entity.getArea().intersects(hotspotBox)) { // Found collision, early stop. return true; } } } return false; } /** * This function samples a randomized line that contains of x and y values * between <i>startX</i>, <i>endX</i>, <i>startY</i> and <i>endY</i>. The * number of points in the line is specified by <i>num</i>. * * @param num The number of points in the line. * @param startX The min value of the x values. * @param endX The max value of the x values. * @param startY The min value of the y values. * @param endY The max value of the y values. * @return an array with [allX-values, allY-values]. * @throws IllegalArgumentException */ public static double[][] randomizeLine( int num, double startX, double endX, double startY, double endY ) throws IllegalArgumentException { if (num <= 0) { throw new IllegalArgumentException("Parameter 'num' has to be > 0"); } Random random = new Random(); double[] x = new double[num]; double[] y = new double[num]; for (int i = 0; i < num; i++) { double xFac = random.nextDouble(); double yFac = random.nextDouble(); x[i] = startX + xFac * (endX - startX); y[i] = startY + yFac * (endY - startY); logger.debug("Created new point: " + x[i] + "|" + y[i]); } return new double[][] { x, y }; } public static StyledXYSeries sampleFunction2D( Function func, ThemeDocument theme, String seriesKey, int samples, double start, double end ) { StyledXYSeries series = new StyledXYSeries(seriesKey, theme); double step = (end - start) / (samples - 1); for (int i = 0; i < samples; i++) { double x = start + (step * i); series.add(x, func.value(x)); } return series; } public static StyledXYSeries sampleFunction2DPositive( Function func, ThemeDocument theme, String seriesKey, int samples, double start, double end ) { StyledXYSeries series = new StyledXYSeries(seriesKey, theme); double step = (end - start) / (samples - 1); for (int i = 0; i < samples; i++) { double x = start + (step * i); double v = func.value(x); if (x > 0d && v > 0d) { series.add(x, v); } } return series; } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :