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/******************************************************************************* |
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* Copyright (c) 2009 Martin O. J. Schmitz. |
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* |
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* This file is part of the SCHMITZM library - a collection of utility |
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* classes based on Java 1.6, focussing (not only) on Java Swing |
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* and the Geotools library. |
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* |
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* The SCHMITZM project is hosted at: |
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* http://wald.intevation.org/projects/schmitzm/ |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU Lesser General Public License |
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* as published by the Free Software Foundation; either version 3 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License (license.txt) |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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* or try this link: http://www.gnu.org/licenses/lgpl.html |
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* |
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* Contributors: |
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* Martin O. J. Schmitz - initial API and implementation |
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* Stefan A. Krüger - additional utility classes |
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******************************************************************************/ |
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/** |
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Copyright 2008 Stefan Alfons Krüger and parts from some Geotools code |
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|
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atlas-framework - This file is part of the Atlas Framework |
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|
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This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. |
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This library 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 Lesser General Public License for more details. |
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You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA |
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|
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Diese Bibliothek ist freie Software; Sie dürfen sie unter den Bedingungen der GNU Lesser General Public License, wie von der Free Software Foundation veröffentlicht, weiterverteilen und/oder modifizieren; entweder gemäß Version 2.1 der Lizenz oder (nach Ihrer Option) jeder späteren Version. |
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Diese Bibliothek wird in der Hoffnung weiterverbreitet, daß sie nützlich sein wird, jedoch OHNE IRGENDEINE GARANTIE, auch ohne die implizierte Garantie der MARKTREIFE oder der VERWENDBARKEIT FÜR EINEN BESTIMMTEN ZWECK. Mehr Details finden Sie in der GNU Lesser General Public License. |
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Sie sollten eine Kopie der GNU Lesser General Public License zusammen mit dieser Bibliothek erhalten haben; falls nicht, schreiben Sie an die Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA. |
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**/ |
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package skrueger.geotools; |
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|
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import java.awt.Canvas; |
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import java.awt.Color; |
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import java.awt.Dimension; |
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import java.awt.FontMetrics; |
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import java.awt.Graphics; |
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import java.awt.Graphics2D; |
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import java.awt.RenderingHints; |
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import java.awt.image.BufferedImage; |
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import java.awt.image.ImageObserver; |
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import java.util.ArrayList; |
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import java.util.List; |
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|
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import javax.swing.tree.DefaultTreeCellRenderer; |
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|
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import org.apache.log4j.Logger; |
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import org.geotools.factory.GeoTools; |
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import org.geotools.factory.Hints; |
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import org.geotools.feature.AttributeType; |
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import org.geotools.feature.Feature; |
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import org.geotools.feature.FeatureType; |
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import org.geotools.feature.IllegalAttributeException; |
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import org.geotools.geometry.jts.LiteShape2; |
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import org.geotools.renderer.lite.StyledShapePainter; |
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import org.geotools.renderer.style.SLDStyleFactory; |
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import org.geotools.renderer.style.Style2D; |
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import org.geotools.styling.LineSymbolizer; |
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import org.geotools.styling.PointSymbolizer; |
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import org.geotools.styling.PolygonSymbolizer; |
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import org.geotools.styling.RasterSymbolizer; |
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import org.geotools.styling.Rule; |
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import org.geotools.styling.Style; |
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import org.geotools.styling.Symbolizer; |
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import org.geotools.styling.TextSymbolizer; |
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import org.geotools.util.NumberRange; |
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|
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import schmitzm.geotools.feature.FeatureUtil; |
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|
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import com.vividsolutions.jts.geom.Coordinate; |
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import com.vividsolutions.jts.geom.GeometryFactory; |
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import com.vividsolutions.jts.geom.LineString; |
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import com.vividsolutions.jts.geom.LinearRing; |
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import com.vividsolutions.jts.geom.Polygon; |
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|
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/** |
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* Based on geoserver! |
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* <hr> |
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* <b>Changes by <a href="mailto:[email protected]">Martin Schmitz</a></b> |
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* <br> |
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* <ul> |
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* <li>07.02.2008:<br> |
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* Determining the default values of a {@link FeatureType} by |
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* {@link FeatureUtil#getDefaultAttributeValues(FeatureType)} instead of using |
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* {@link AttributeType#createDefaultValue()} directly, because the latter |
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* returns {@code null} even though the attribut is not nillable.</li> |
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* </ul> |
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* |
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* @author Stefan Alfons Krüger |
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*/ |
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public class LegendIconFeatureRenderer extends DefaultTreeCellRenderer { |
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private static final Dimension SIZE = new Dimension(30,20); |
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|
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Logger LOGGER = Logger.getLogger(LegendIconFeatureRenderer.class); |
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|
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/** |
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* This is a static class |
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*/ |
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private LegendIconFeatureRenderer() { |
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} |
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|
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final static LegendIconFeatureRenderer instance = new LegendIconFeatureRenderer(); |
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|
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public static LegendIconFeatureRenderer getInstance() { |
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// In GT 2.4.5 it we have to create a new one all the time! |
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return new LegendIconFeatureRenderer(); |
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// return instance; |
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} |
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|
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/** The image produced at <code>produceLegendGraphic</code> */ |
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private BufferedImage legendGraphic; |
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|
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/** |
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* used to create sample point shapes with LiteShape (not lines nor |
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* polygons) |
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*/ |
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private static final GeometryFactory geomFac = new GeometryFactory(); |
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|
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/** padding percentage factor at both sides of the legend. */ |
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private static final float hpaddingFactor = 0.11f; // was 0.15 |
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|
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/** top & bottom padding percentage factor for the legend */ |
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private static final float vpaddingFactor = 0.08f; // was 0.15 |
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|
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/** |
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* Image observer to help in creating the stack like legend graphic from the |
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* images created for each rule |
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*/ |
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private static final ImageObserver imgObs = new Canvas(); |
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|
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/** |
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* Just a holder to avoid creating many polygon shapes from inside |
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* <code>getSampleShape()</code> |
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*/ |
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private LiteShape2 sampleRect; |
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|
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/** |
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* Just a holder to avoid creating many line shapes from inside |
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* <code>getSampleShape()</code> |
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*/ |
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private LiteShape2 sampleLine; |
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|
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/** |
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* Just a holder to avoid creating many point shapes from inside |
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* <code>getSampleShape()</code> |
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*/ |
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private LiteShape2 samplePoint; |
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|
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private Hints hints; |
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|
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/** |
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* Returns a <code>java.awt.Shape</code> appropiate to render a legend |
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* graphic given the symbolizer type and the legend dimensions. |
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* |
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* @param symbolizer |
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* the Symbolizer for whose type a sample shape will be created |
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* @param legendWidth |
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* the requested width, in output units, of the legend graphic |
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* @param legendHeight |
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* the requested height, in output units, of the legend graphic |
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* |
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* @return an appropiate Line2D, Rectangle2D or LiteShape(Point) for the |
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* symbolizer, wether it is a LineSymbolizer, a PolygonSymbolizer, |
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* or a Point ot Text Symbolizer |
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* |
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* @throws IllegalArgumentException |
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* if an unknown symbolizer impl was passed in. |
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*/ |
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private LiteShape2 getSampleShape(Symbolizer symbolizer, int legendWidth, |
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int legendHeight) { |
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LiteShape2 sampleShape; |
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final float hpad = (legendWidth * hpaddingFactor); |
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final float vpad = (legendHeight * vpaddingFactor); |
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|
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if (symbolizer instanceof LineSymbolizer) { |
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if (this.sampleLine == null) { |
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Coordinate[] coords = { |
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new Coordinate(hpad, legendHeight - vpad), |
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new Coordinate(legendWidth - hpad, vpad) }; |
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LineString geom = geomFac.createLineString(coords); |
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|
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try { |
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this.sampleLine = new LiteShape2(geom, null, null, false); |
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} catch (Exception e) { |
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this.sampleLine = null; |
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} |
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} |
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|
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sampleShape = this.sampleLine; |
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} else if ((symbolizer instanceof PolygonSymbolizer) |
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|| (symbolizer instanceof RasterSymbolizer)) { |
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if (this.sampleRect == null) { |
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final float w = legendWidth - (2 * hpad); |
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final float h = legendHeight - (2 * vpad); |
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|
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Coordinate[] coords = { new Coordinate(hpad, vpad), |
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new Coordinate(hpad, vpad + h), |
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new Coordinate(hpad + w, vpad + h), |
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new Coordinate(hpad + w, vpad), |
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new Coordinate(hpad, vpad) }; |
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LinearRing shell = geomFac.createLinearRing(coords); |
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Polygon geom = geomFac.createPolygon(shell, null); |
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|
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try { |
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this.sampleRect = new LiteShape2(geom, null, null, false); |
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} catch (Exception e) { |
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this.sampleRect = null; |
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} |
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} |
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|
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sampleShape = this.sampleRect; |
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} else if (symbolizer instanceof PointSymbolizer |
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|| symbolizer instanceof TextSymbolizer) { |
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if (this.samplePoint == null) { |
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Coordinate coord = new Coordinate(legendWidth / 2, |
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legendHeight / 2); |
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|
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try { |
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this.samplePoint = new LiteShape2(geomFac |
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.createPoint(coord), null, null, false); |
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} catch (Exception e) { |
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this.samplePoint = null; |
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} |
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} |
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|
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sampleShape = this.samplePoint; |
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} else { |
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throw new IllegalArgumentException("Unknown symbolizer: " |
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+ symbolizer); |
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} |
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|
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return sampleShape; |
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} |
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|
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/** |
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* Puts a BufferedImage into this.legendGraphic |
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*/ |
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public void produceLegendGraphic(FeatureType featureType, Style gt2Style, |
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Rule[] applicableRules) { |
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|
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// final FeatureTypeStyle[] ftStyles = gt2Style.getFeatureTypeStyles(); |
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|
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// if (request.getRule() != null) { |
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// applicableRules = new Rule[] { request.getRule() }; |
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// } else { |
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// applicableRules = getApplicableRules(ftStyles, scaleDenominator); |
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// } |
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|
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final int ruleCount = applicableRules.length; |
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|
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/** |
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* A legend graphic is produced for each applicable rule. They're being |
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* holded here until the process is done and then painted on a "stack" |
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* like legend. |
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*/ |
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final List<BufferedImage> legendsStack = new ArrayList<BufferedImage>( |
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ruleCount); |
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|
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for (int i = 0; i < ruleCount; i++) { |
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BufferedImage image = createImageForRule(applicableRules[i], |
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featureType, SIZE); |
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legendsStack.add(image); |
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} |
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|
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// this.legendGraphic = |
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// scaleImage(mergeLegends(legendsStack,applicableRules), request); |
| 279 |
this.legendGraphic = mergeLegends(legendsStack, applicableRules); |
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} |
| 281 |
|
| 282 |
/** |
| 283 |
* Recieves a list of <code>BufferedImages</code> and produces a new one |
| 284 |
* which holds all the images in <code>imageStack</code> one above the |
| 285 |
* other. |
| 286 |
* |
| 287 |
* @param imageStack |
| 288 |
* the list of BufferedImages, one for each applicable Rule |
| 289 |
* @param rules |
| 290 |
* The applicable rules, one for each image in the stack |
| 291 |
* @param request |
| 292 |
* The request. |
| 293 |
* |
| 294 |
* @return the stack image with all the images on the argument list. |
| 295 |
* |
| 296 |
* @throws IllegalArgumentException |
| 297 |
* if the list is empty |
| 298 |
*/ |
| 299 |
private static BufferedImage mergeLegends(List<BufferedImage> imageStack, |
| 300 |
Rule[] rules) { |
| 301 |
if (imageStack.size() == 0) { |
| 302 |
throw new IllegalArgumentException("No legend graphics passed"); |
| 303 |
} |
| 304 |
|
| 305 |
BufferedImage finalLegend = null; |
| 306 |
|
| 307 |
if (imageStack.size() == 1) { |
| 308 |
finalLegend = (BufferedImage) imageStack.get(0); |
| 309 |
} else { |
| 310 |
final int imgCount = imageStack.size(); |
| 311 |
final String[] labels = new String[imgCount]; |
| 312 |
|
| 313 |
BufferedImage img = ((BufferedImage) imageStack.get(0)); |
| 314 |
FontMetrics fontMetrics = img.getGraphics().getFontMetrics(); |
| 315 |
|
| 316 |
final int rowHeight = Math.max(fontMetrics.getHeight(), img |
| 317 |
.getHeight()); |
| 318 |
|
| 319 |
// calculate the total dimensions of the image |
| 320 |
int totalHeight = rowHeight * imgCount; |
| 321 |
int totalWidth = 0; |
| 322 |
|
| 323 |
for (int i = 0; i < imgCount; i++) { |
| 324 |
img = (BufferedImage) imageStack.get(i); |
| 325 |
|
| 326 |
Rule rule = rules[i]; |
| 327 |
|
| 328 |
// does this rule have a label |
| 329 |
labels[i] = rule.getTitle(); |
| 330 |
|
| 331 |
if (labels[i] == null) { |
| 332 |
labels[i] = rule.getName(); |
| 333 |
} |
| 334 |
|
| 335 |
int w = img.getWidth(); |
| 336 |
|
| 337 |
if (labels[i] != null) { |
| 338 |
Graphics g = img.getGraphics(); |
| 339 |
w += g.getFontMetrics().stringWidth(labels[i]); |
| 340 |
} |
| 341 |
|
| 342 |
totalWidth = Math.max(w, totalWidth); |
| 343 |
} |
| 344 |
|
| 345 |
// create the final image |
| 346 |
finalLegend = new BufferedImage(totalWidth, totalHeight, |
| 347 |
BufferedImage.TYPE_INT_ARGB); |
| 348 |
|
| 349 |
Graphics2D finalGraphics = finalLegend.createGraphics(); |
| 350 |
|
| 351 |
finalGraphics.setColor(Color.white); |
| 352 |
finalGraphics.fillRect(0, 0, totalWidth, totalHeight); |
| 353 |
|
| 354 |
int h = 0; |
| 355 |
|
| 356 |
for (int i = 0; i < imgCount; i++) { |
| 357 |
img = (BufferedImage) imageStack.get(i); |
| 358 |
|
| 359 |
// draw the image |
| 360 |
int y = h; |
| 361 |
|
| 362 |
if (img.getHeight() < rowHeight) { |
| 363 |
// move the image to the center of the row |
| 364 |
y += (int) ((rowHeight - img.getHeight()) / 2d); |
| 365 |
} |
| 366 |
|
| 367 |
finalGraphics.drawImage(img, 0, y, imgObs); |
| 368 |
|
| 369 |
// draw the label |
| 370 |
if (labels[i] != null) { |
| 371 |
finalGraphics.setColor(Color.BLACK); |
| 372 |
|
| 373 |
y = (h + rowHeight) - fontMetrics.getDescent(); |
| 374 |
|
| 375 |
if (fontMetrics.getHeight() < rowHeight) { |
| 376 |
// move the baseline to the center of the row |
| 377 |
y -= (int) ((rowHeight - fontMetrics.getHeight()) / 2d); |
| 378 |
} |
| 379 |
|
| 380 |
finalGraphics.drawString(labels[i], img.getWidth(), y); |
| 381 |
} |
| 382 |
|
| 383 |
h += rowHeight; |
| 384 |
} |
| 385 |
} |
| 386 |
|
| 387 |
return finalLegend; |
| 388 |
} |
| 389 |
|
| 390 |
/** |
| 391 |
* DOCUMENT ME! |
| 392 |
* |
| 393 |
* @return |
| 394 |
* |
| 395 |
* @throws IllegalStateException |
| 396 |
* DOCUMENT ME! |
| 397 |
*/ |
| 398 |
public BufferedImage getLegendGraphic() { |
| 399 |
if (this.legendGraphic == null) { |
| 400 |
throw new IllegalStateException(); |
| 401 |
} |
| 402 |
return this.legendGraphic; |
| 403 |
} |
| 404 |
|
| 405 |
// /** |
| 406 |
// * Paints a little rectangle in the color defined by the |
| 407 |
// * {@link ColorMapEntry} |
| 408 |
// * |
| 409 |
// * unused |
| 410 |
// * |
| 411 |
// * @param cme |
| 412 |
// * {@link ColorMapEntry} |
| 413 |
// * @param cm |
| 414 |
// * {@link ColorMap} to determine type (VALUES, INTERVALL ) |
| 415 |
// * @param iconWidth |
| 416 |
// * Size of the rectangle |
| 417 |
// * @param iconHeight |
| 418 |
// * Size of the rectangle |
| 419 |
// * @return {@link ImageIcon} of that color, maybe with a white border |
| 420 |
// * @author Stefan Alfons Krüger |
| 421 |
// */ |
| 422 |
// public static ImageIcon createImageForColorMapEntry(ColorMapEntry cme, |
| 423 |
// ColorMap cm, Integer iconWidth, Integer iconHeight) { |
| 424 |
// |
| 425 |
// BufferedImage imageForRule = new BufferedImage(iconWidth, iconHeight, |
| 426 |
// BufferedImage.TYPE_INT_ARGB); |
| 427 |
// |
| 428 |
// final Color color = StylingUtil.getColorFromColorMapEntry(cme); |
| 429 |
// |
| 430 |
// // Paint a block |
| 431 |
// for (int x = 0; x < iconWidth; x++) { |
| 432 |
// for (int y = 0; y < iconHeight; y++) { |
| 433 |
// int rgb = color.getRGB(); |
| 434 |
// int rand = 2; |
| 435 |
// |
| 436 |
// // Paint a white border if the type is VALUES |
| 437 |
// if ((x < rand) || (x > iconWidth - rand) || (y < rand) |
| 438 |
// || (y > iconHeight - rand)) { |
| 439 |
// if (cm.getType() == ColorMap.TYPE_VALUES) { |
| 440 |
// rgb = Color.white.getRGB(); |
| 441 |
// } |
| 442 |
// } |
| 443 |
// imageForRule.setRGB(x, y, rgb); |
| 444 |
// } |
| 445 |
// } |
| 446 |
// return new ImageIcon(imageForRule); |
| 447 |
// } |
| 448 |
|
| 449 |
/** |
| 450 |
* Creates a little BufferedImage that presents the Style/Symbols used by |
| 451 |
* the {@link MapLegend} to show a legend for the {@link FeatureType} |
| 452 |
* |
| 453 |
* @param rule |
| 454 |
* {@link Rule} that provides the text and the style to present |
| 455 |
* @param featureType |
| 456 |
* Schema that describes the kind of the sample {@link Feature} |
| 457 |
* that will be rendered with the {@link Style} |
| 458 |
* @param bg |
| 459 |
* Background {@link Color} or <code>null</code> |
| 460 |
* |
| 461 |
* @throws IllegalAttributeException |
| 462 |
*/ |
| 463 |
public BufferedImage createImageForRule(Rule rule, FeatureType featureType, |
| 464 |
Dimension size, Color bg) { |
| 465 |
|
| 466 |
Symbolizer[] symbolizers = rule.getSymbolizers(); |
| 467 |
|
| 468 |
BufferedImage buffImage = new BufferedImage(size.width, size.height, |
| 469 |
BufferedImage.TYPE_INT_ARGB); |
| 470 |
Graphics2D graphics = buffImage.createGraphics(); |
| 471 |
|
| 472 |
if (bg != null) { |
| 473 |
// **************************************************************************** |
| 474 |
// The following lines define the backgroup color for the rendered |
| 475 |
// images |
| 476 |
// **************************************************************************** |
| 477 |
graphics.setBackground(bg); |
| 478 |
graphics.setColor(bg); |
| 479 |
graphics.fillRect(0, 0, size.width, size.height); |
| 480 |
} |
| 481 |
|
| 482 |
// Enable anti-aliasing for the legend symbols |
| 483 |
graphics.setRenderingHints(getHints()); |
| 484 |
|
| 485 |
// TODO scaleDenominator = 100000000000000000000000000000d; Was ist das |
| 486 |
// fuer ein Quatsch? |
| 487 |
final double scaleDenominator = 100000000000000000000000000000d; |
| 488 |
final NumberRange scaleRange = new NumberRange(scaleDenominator, |
| 489 |
scaleDenominator); |
| 490 |
|
| 491 |
try { |
| 492 |
|
| 493 |
for (int sIdx = 0; sIdx < symbolizers.length; sIdx++) { |
| 494 |
Symbolizer symbolizer = symbolizers[sIdx]; |
| 495 |
|
| 496 |
if (symbolizer instanceof TextSymbolizer) { |
| 497 |
LOGGER |
| 498 |
.warn("createImageForRule for a TextSymbolizer. Sure we want that?"); |
| 499 |
continue; |
| 500 |
} |
| 501 |
|
| 502 |
// if (symbolizer instanceof RasterSymbolizer) { |
| 503 |
// log.warn("createImageForRule method can't be used for |
| 504 |
// RasterSymbolizers.."); |
| 505 |
// } |
| 506 |
// else |
| 507 |
final Feature sampleFeature = FeatureUtil.createSampleFeature(featureType); |
| 508 |
|
| 509 |
// The SLDStyleFactory has to be recreated, as it seams to cache |
| 510 |
// some stuff. |
| 511 |
SLDStyleFactory sldStyleFactory = new SLDStyleFactory(); |
| 512 |
Style2D style2d = sldStyleFactory.createStyle(sampleFeature, |
| 513 |
symbolizer, scaleRange); |
| 514 |
|
| 515 |
LiteShape2 shape = getSampleShape(symbolizer, size.width, |
| 516 |
size.height); |
| 517 |
|
| 518 |
if (style2d != null) { |
| 519 |
new StyledShapePainter(null).paint(graphics, shape, |
| 520 |
style2d, scaleDenominator); |
| 521 |
} |
| 522 |
} |
| 523 |
} catch (Exception e) { |
| 524 |
LOGGER |
| 525 |
.error( |
| 526 |
"Error during createImageForRule, returning empty Image", |
| 527 |
e); |
| 528 |
} |
| 529 |
return buffImage; |
| 530 |
} |
| 531 |
|
| 532 |
/** |
| 533 |
* Define Java2D and other Hints |
| 534 |
* |
| 535 |
* @param hints |
| 536 |
* @author <a href="mailto:[email protected]">Stefan Alfons |
| 537 |
* Krüger</a> |
| 538 |
*/ |
| 539 |
public void setHints(Hints hints) { |
| 540 |
getHints().add(hints); |
| 541 |
} |
| 542 |
|
| 543 |
private Hints getHints() { |
| 544 |
if (hints == null) { |
| 545 |
hints = GeoTools.getDefaultHints(); |
| 546 |
hints.put(RenderingHints.KEY_ANTIALIASING, |
| 547 |
RenderingHints.VALUE_ANTIALIAS_ON); |
| 548 |
hints.put(RenderingHints.KEY_TEXT_ANTIALIASING, |
| 549 |
RenderingHints.VALUE_TEXT_ANTIALIAS_GASP); |
| 550 |
hints.put(RenderingHints.KEY_ALPHA_INTERPOLATION, |
| 551 |
RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY); |
| 552 |
hints.put(RenderingHints.KEY_RENDERING, |
| 553 |
RenderingHints.VALUE_RENDER_QUALITY); |
| 554 |
hints.put(RenderingHints.KEY_COLOR_RENDERING, |
| 555 |
RenderingHints.VALUE_COLOR_RENDER_QUALITY); |
| 556 |
} |
| 557 |
return hints; |
| 558 |
} |
| 559 |
|
| 560 |
/** |
| 561 |
* Creates a little BufferedImage that presents the Style/Symbols used by |
| 562 |
* the {@link MapLegend} to show a legend for the {@link FeatureType} |
| 563 |
* |
| 564 |
* @param rule |
| 565 |
* {@link Rule} that provides the text and the style to present |
| 566 |
* @param featureType |
| 567 |
* Schema that describes the kind of the sample {@link Feature} |
| 568 |
* that will be rendered with the {@link Style} |
| 569 |
* |
| 570 |
* @throws IllegalAttributeException |
| 571 |
*/ |
| 572 |
public BufferedImage createImageForRule(final Rule rule, |
| 573 |
final FeatureType featureType, final Dimension size) { |
| 574 |
return createImageForRule(rule, featureType, size, null); |
| 575 |
} |
| 576 |
|
| 577 |
} |
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