| gvSIG desktop 1

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2005 IVER T.I. and Generalitat Valenciana.

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * 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 General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,USA.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

/* CVS MESSAGES:

*

* $Id: SimpleLabelingStrategy.java 10671 2007-03-09 08:33:43Z jaume $

* $Log$

* Revision 1.1  2007-03-09 08:33:43  jaume

* *** empty log message ***

*

* Revision 1.1.2.5  2007/02/21 07:34:08  jaume

* labeling starts working

*

* Revision 1.1.2.4  2007/02/15 16:23:44  jaume

* *** empty log message ***

*

* Revision 1.1.2.3  2007/02/09 07:47:05  jaume

* Isymbol moved

*

* Revision 1.1.2.2  2007/02/02 16:21:24  jaume

* start commiting labeling stuff

*

* Revision 1.1.2.1  2007/02/01 17:46:49  jaume

* *** empty log message ***

*

*

*/

package com.iver.cit.gvsig.fmap.rendering.styling;

import java.awt.Graphics2D;

import java.awt.geom.AffineTransform;

import java.awt.geom.Rectangle2D;

import java.awt.image.BufferedImage;

import java.util.Hashtable;

import java.util.logging.Level;

import java.util.logging.Logger;

import com.iver.cit.gvsig.fmap.DriverException;

import com.iver.cit.gvsig.fmap.ViewPort;

import com.iver.cit.gvsig.fmap.core.FPoint2D;

import com.iver.cit.gvsig.fmap.core.FShape;

import com.iver.cit.gvsig.fmap.core.IGeometry;

import com.iver.cit.gvsig.fmap.core.TextPath;

import com.iver.cit.gvsig.fmap.core.symbols.ITextSymbol;

import com.iver.cit.gvsig.fmap.core.symbols.SimpleTextSymbol;

import com.iver.cit.gvsig.fmap.drivers.DriverIOException;

import com.iver.cit.gvsig.fmap.layers.FBitSet;

import com.iver.cit.gvsig.fmap.layers.FLayer;

import com.iver.cit.gvsig.fmap.layers.FLyrVect;

import com.iver.cit.gvsig.fmap.layers.ReadableVectorial;

import com.iver.cit.gvsig.fmap.layers.SelectableDataSource;

import com.iver.utiles.XMLEntity;

import com.iver.utiles.swing.threads.Cancellable;

/**

 * This is the default and simplest (therefore fastest) labeling strategy.

 * @author   jaume dominguez faus - jaume.dominguez@iver.es

 */

public class SimpleLabelingStrategy implements ILabelingStrategy {

        private static Logger logger = Logger.getAnonymousLogger();

        private ILabelingMethod method;

        private IPlacementConstraints placementConstraints;

        private FLyrVect layer;

        private IZoomConstraints zoomConstraints;

        private Hashtable textPaths = new Hashtable(), texts = new Hashtable();

        protected SimpleLabelingStrategy(FLayer layer) throws DriverException {

                FLyrVect l = (FLyrVect) layer;

                this.layer = l;

                if (layer instanceof FLyrVect) {

                        FLyrVect lyrVect = (FLyrVect) layer;

                        placementConstraints = LabelingFactory.createPlacementConstraints(lyrVect);

                } else {

                        throw new Error("Layer type not yet supported");

                }

                method = new EquallyLabeled();

        }

        public ILabelingMethod getLabelingMethod() {

                return method;

        }

        public void setLabelingMethod(ILabelingMethod method) {}

        public void draw(BufferedImage image, Graphics2D g, ViewPort viewPort, Cancellable cancel) throws DriverException {

                 Rectangle2D theExtent = viewPort.getAdjustedExtent();

                 if (zoomConstraints != null) {

                         double scale = viewPort.getScale();

                         if (scale < zoomConstraints.getMinScale() ||

                             scale > zoomConstraints.getMaxScale())

                                 return;

                 }

                 FBitSet bs = layer.queryByRect(theExtent);

                 LabelClass lc = method.getDefaultLabelClass();

                 ReadableVectorial rv = layer.getSource();

                 SelectableDataSource sds = rv.getRecordset();

                 ITextSymbol sym = lc.getLabelSymbol();

                 for(int i=bs.nextSetBit(0); i>=0 && !cancel.isCanceled(); i=bs.nextSetBit(i+1)) {

                         IGeometry geom;

                         try {

                                 Integer index = new Integer(i);

                                 String text = getText(index, sds);

                                 sym.setText(text);

                                 geom = rv.getShape(i);

                                 FShape[] shp = placementConstraints.getLocationsFor(geom, sym, null);

                                 AffineTransform at = viewPort.getAffineTransform();

                                 for (int j = 0; j < shp.length; j++) {

                                         sym.draw(g, at, shp[i]);

                                 }

                         } catch (DriverIOException e) {

                                 logger.log(Level.SEVERE, "Draw label for "+i+"th shape of "+layer.getName());

                         } catch (com.hardcode.gdbms.engine.data.driver.DriverException e) {

                                 logger.log(Level.SEVERE, "Getting label text for "+i+"th shape of "+layer.getName());

                        }

                 }

        }

        private String getText(Integer index, SelectableDataSource sds) throws com.hardcode.gdbms.engine.data.driver.DriverException {

                String text = (String) texts.get(index);

                if (text == null) {

                        String expr = method.getDefaultLabelClass().getLabelExpression();

                        // TODO el analizador sint?ctico de momento s?lo pilla un valor del combo por

                        // defecto

                        String fieldName = expr.replaceAll("\\[", "").replaceAll("\\]", "").trim();

                        text = sds.getFieldValue(index.longValue(), sds.getFieldIndexByName(fieldName)).toString();

                        texts.put(index, text);

                }

                return text;

        }

        private TextPath getTreePath(Integer index, Graphics2D g, FShape shp, char[] text) {

                TextPath tp = (TextPath) textPaths.get(index);

                if (tp == null) {

                        tp = new TextPath(g, shp, text);

                        textPaths.put(index, tp);

                }

                return tp;

        }

        public String getClassName() {

                return getClass().getName();

        }

        public XMLEntity getXMLEntity() {

                // TODO Implement it

//                throw new Error("Not yet implemented!");

                return new XMLEntity();

        }

        public void setXMLEntity(XMLEntity xml) {

                // TODO Implement it

//                throw new Error("Not yet implemented!");

        }

        public IPlacementConstraints getPlacementConstraints() {

                return placementConstraints;

        }

        public void setPlacementConstraints(IPlacementConstraints constraints) {}

        public IZoomConstraints getZoomConstraints() {

                return zoomConstraints;

        }

        public void setZoomConstraints(IZoomConstraints constraints) {

                this.zoomConstraints = constraints;

        }

}