Application: gvSIG desktop

/* 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

 */

package org.gvsig.labeling.label;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelClass;

import org.gvsig.fmap.mapcontext.rendering.legend.styling.ILabelLocationMetrics;

import org.gvsig.fmap.mapcontext.rendering.symbols.ITextSymbol;

import org.gvsig.fmap.mapcontext.rendering.symbols.SymbolDrawingException;

import org.gvsig.fmap.mapcontext.rendering.symbols.styles.ILabelStyle;

import org.gvsig.labeling.symbol.SmartTextSymbol;

import org.gvsig.symbology.SymbologyLocator;

import org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling.LabelClass;

import org.gvsig.symbology.fmap.mapcontext.rendering.legend.styling.LabelLocationMetrics;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynStruct;

import org.gvsig.tools.persistence.PersistenceManager;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.persistence.exception.PersistenceException;

import org.gvsig.tools.util.Callable;

/**

 * <p>

 * SmartTextSymbolLabelClass.java<br>

 * </p>

 *

 * <p>

 *

 *   This is a <b>wrapper</b> to be able to use a SmartTextSymbol as a

 * LabelClass. A SmartTextSymbol uses a line instead of a point.

 * Being in fact a Line and not a Marker, it does not make any sense

 * to have label styles since the label styles are well-defined rectangle

 * areas where texts are placed in fields backgrounded by an image. In this

 * contexts, the area is defined dinamically for each line, and there is no

 * sense to have texts fields. They will be rendered as a single string

 * along a line.<br>

 * </p>

 * <p> The label itself is the SmartTextSymbol,

 * the geometry (the line), the label expression,

 * and the text applied to the symbol.<br>

 * </p>

 * <p>

 *   Most of the operations performed by this LabelClass are in fact

 * delegated to the symbol.<br>

 * </p>

 *

 *

 * @author jaume dominguez faus - jaume.dominguez@iver.es Mar 6, 2008

 *

 */

public class SmartTextSymbolLabelClass extends LabelClass {

    private static Logger logger = LoggerFactory.getLogger(

        SmartTextSymbolLabelClass.class);

    public static final String SMART_LABEL_CLASS_PERSISTENCE_DEFINITION_NAME =

        "Smart LabelClass";

    private ILabelClass defLabelClass = null;

	private SmartTextSymbol smartTextSymbol;

	public SmartTextSymbolLabelClass() {

	    defLabelClass = SymbologyLocator.getSymbologyManager().createDefaultLabel();

	}

	public void draw(Graphics2D graphics, ILabelLocationMetrics llm, Geometry geo) {

		getTextSymbol().draw(graphics, null, geo, null, null);

	}

	public void drawInsideRectangle(Graphics2D graphics, Rectangle bounds)

			throws SymbolDrawingException {

		getTextSymbol().drawInsideRectangle(graphics, null, bounds, null);

	}

	public String getClassName() {

		return getClass().getName();

	}

	public ILabelStyle getLabelStyle() {

		// label style not allowed in this context

		return null;

	}

	public ITextSymbol getTextSymbol() {

		if (smartTextSymbol == null) {

			smartTextSymbol = new SmartTextSymbol();

		}

		return smartTextSymbol;

	}

	public void setLabelStyle(ILabelStyle labelStyle) {

		// operation not supported in this context

	}

	public void setTextSymbol(ITextSymbol textSymbol) {

	    if (textSymbol instanceof SmartTextSymbol) {

	        this.smartTextSymbol = (SmartTextSymbol) textSymbol;

	    } else {

	        logger.error("While setting text symbol in label class",

	            new Exception("Text symbol must be a SmartTextSymbol here"));

	    }

	    defLabelClass.setTextSymbol(textSymbol);

	}

	public void loadFromState(PersistentState state)

        throws PersistenceException {

	    defLabelClass.loadFromState(state);

	}

	public void saveToState(PersistentState state)

	    throws PersistenceException {

	    defLabelClass.saveToState(state);

	}

    public static void registerPersistent() {

        PersistenceManager manager = ToolsLocator.getPersistenceManager();

        if (manager.getDefinition(SMART_LABEL_CLASS_PERSISTENCE_DEFINITION_NAME)==null) {

            DynStruct definition = manager.addDefinition(

                SmartTextSymbolLabelClass.class,

                    SMART_LABEL_CLASS_PERSISTENCE_DEFINITION_NAME,

                    SMART_LABEL_CLASS_PERSISTENCE_DEFINITION_NAME

                    + " Persistence definition",

                    null, 

                    null

            );

            definition.extend(manager.getDefinition(

                LABEL_CLASS_PERSISTENCE_DEFINITION_NAME));

        }

    }

}