| gvSIG desktop 1

/* gvSIG. Geographic Information System of the Valencian Government

 *

 * Copyright (C) 2007-2008 Infrastructures and Transports Department

 * of the Valencian Government (CIT)

 * 

 * 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., 51 Franklin Street, Fifth Floor, Boston, 

 * MA  02110-1301, USA.

 * 

 */

package org.gvsig.symbology.fmap.mapcontext.rendering.symbol.fill.impl;

import java.awt.Color;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.geom.AffineTransform;

import java.util.ArrayList;

import java.util.List;

import org.gvsig.compat.print.PrintAttributes;

import org.gvsig.fmap.dal.feature.Feature;

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.ViewPort;

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

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

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

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.fill.IFillSymbol;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.line.ILineSymbol;

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.task.Cancellable;

/**

 * MultiLayerFillSymbol is a symbol which allows to group several kind of fill symbols

 * (xxxFillSymbol implementing IFillSymbol)in one and treats it like single symbol.

 * @author 2009-     <a href="cordinyana@gvsig.org">C?sar Ordi?ana</a> - gvSIG team

 */

public class MultiLayerFillSymbol extends AbstractFillSymbol implements IFillSymbol, IMultiLayerSymbol{

    public static final String MULTILAYER_FILL_SYMBOL_DYNCLASS_NAME = "MultiLayerFillSymbol";

//    private static final String FIELD_SYMBOL_FOR_SELECTION = "symbolForSelection";

    private static final String FIELD_LAYERS = "layers";

        private static final double OPACITY_SELECTION_FACTOR = .8;

        private IFillSymbol[] layers = new IFillSymbol[0];

        private MultiLayerFillSymbol selectionSymbol;

//        private Object symbolType;

        public Color getFillColor() {

                /*

                 * a multilayer symbol does not define any color, the color

                 * of each layer is defined by the layer itself

                 */

                return null;

        }

        public int getOnePointRgb() {

                // will paint only the last layer pixel

                return layers[layers.length-1].getOnePointRgb();

        }

        public ILineSymbol getOutline() {

                /*

                 * a multilayer symbol does not define any outline, the outline

                 * of each layer is defined by the layer it self

                 */

                return null;

        }

        public boolean isSuitableFor(Geometry geom) {

                return geom.getType() == Geometry.TYPES.SURFACE;

        }

        public void setFillColor(Color color) {

                /*

                 * Will apply the color to each layer

                 */

                for (int i = 0; layers != null && i < layers.length; i++) {

                        layers[i].setFillColor(color);

                }

        }

        public void setOutline(ILineSymbol outline) {

                if (layers != null && layers.length > 0) {

                        for (int i = 0; i < layers.length - 1; i++) {

                                layers[i].setOutline(null);

                        }

                        layers[layers.length - 1].setOutline(outline);

                }

        }

        public void draw(Graphics2D g, AffineTransform affineTransform,

                        Geometry geom, Feature feature, Cancellable cancel) {

                for (int i = 0; (cancel == null || !cancel.isCanceled())

                                && layers != null && i < layers.length; i++) {

                        layers[i].draw(g, affineTransform, geom, feature, cancel);

                }

        }

        public void drawInsideRectangle(Graphics2D g,

                        AffineTransform scaleInstance, Rectangle r, PrintAttributes properties) throws SymbolDrawingException {

                for (int i = 0; layers != null && i < layers.length; i++) {

                        layers[i].drawInsideRectangle(g, scaleInstance, r, properties);

                }

        }

        public void getPixExtentPlus(Geometry geom, float[] distances,

                        ViewPort viewPort, int dpi) {

                float[] myDistances = new float[] {0,0};

                distances[0] = 0;

                distances[1] = 0;

                for (int i = 0; layers != null && i < layers.length; i++) {

                        layers[i].getPixExtentPlus(geom, myDistances, viewPort, dpi);

                        distances[0] = Math.max(myDistances[0], distances[0]);

                        distances[1] = Math.max(myDistances[1], distances[1]);

                }

        }

        public ISymbol getSymbolForSelection() {

            // TODO: revisar

                if (selectionSymbol == null) {

                            MultiLayerFillSymbol selectionSymbol = 

                                new MultiLayerFillSymbol();

                        selectionSymbol.setDescription(getDescription());

//                        selectionSymbol.symbolType = symbolType;

                        for (int i = 0; layers != null && i < layers.length; i++) {

                                selectionSymbol.addLayer(layers[i].getSymbolForSelection());

                        }

                        SimpleFillSymbol selLayer = new SimpleFillSymbol();

                        Color c = MapContext.getSelectionColor();

                        c = new Color(

                                        c.getRed(),

                                        c.getGreen(),

                                        c.getBlue(),

                                        (int) (255*OPACITY_SELECTION_FACTOR));

                        selLayer.setFillColor(c);

                        selLayer.setOutline(getOutline());

                        selectionSymbol.addLayer(selLayer);

                        setSymbolForSelection(selectionSymbol);

                }

                return selectionSymbol;

        }

        public int getSymbolType() {

                return Geometry.TYPES.SURFACE;

        }

        public void setPrintingProperties(PrintAttributes printProperties) {

                // TODO Implement it

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

        }

        public String getClassName() {

                return getClass().getName();

        }

        public void print(Graphics2D g, AffineTransform at, Geometry geom, PrintAttributes properties) {

                for (int i = 0; layers != null && i < layers.length; i++) {

                        layers[i].print(g, at, geom, properties);

                }

        }

        public void setLayer(int index, ISymbol layer) throws IndexOutOfBoundsException {

                layers[index] = (IFillSymbol) layer;

        }

        public void swapLayers(int index1, int index2) {

                ISymbol aux1 = getLayer(index1), aux2 = getLayer(index2);

                layers[index2] = (IFillSymbol) aux1;

                layers[index1] = (IFillSymbol) aux2;

        }

        public ISymbol getLayer(int layerIndex) {

//                try{

                        return layers[layerIndex];

//                } catch (Exception e) {

//                        return null;

//                }

        }

        public int getLayerCount() {

                return layers.length;

        }

        public void addLayer(ISymbol newLayer) {

                addLayer(newLayer, layers.length);

        }

        public void addLayer(ISymbol newLayer, int layerIndex) throws IndexOutOfBoundsException {

                if (newLayer == null ) {

                        /*|| newLayer instanceof ILabelStyle)*/ return; // null or symbols that are styles are not allowed

                }

                selectionSymbol = null; /* forces the selection symbol to be re-created

                                                                  * next time it is required

                                                                  */

                if (layerIndex < 0 || layers.length < layerIndex) {

                        throw new IndexOutOfBoundsException(layerIndex+" < 0 or "+layerIndex+" > "+layers.length);

                }

                List<ISymbol> newLayers = new ArrayList<ISymbol>();

                for (int i = 0; i < layers.length; i++) {

                        newLayers.add(layers[i]);

                }

                try {

                        newLayers.add(layerIndex, newLayer);

                        layers = (IFillSymbol[]) newLayers.toArray(new IFillSymbol[0]);

                } catch (ArrayStoreException asEx) {

                        throw new ClassCastException(newLayer.getClass().getName() + " is not an IFillSymbol");

                }

        }

        public boolean removeLayer(ISymbol layer) {

                int capacity = 0;

                capacity = layers.length;

                List<IFillSymbol> lst = new ArrayList<IFillSymbol>(capacity);

                for (int i = 0; layers != null && i < capacity; i++) {

                        lst.add(layers[i]);

                }

                boolean contains = lst.remove(layer);

                layers = (IFillSymbol[])lst.toArray(new IFillSymbol[0]);

                return contains;

        }

        public void setUnit(int unitIndex) {

                super.setUnit(unitIndex);

                for (int i = 0; layers != null && i < layers.length; i++) {

                        layers[i].setUnit(unitIndex);

                }

        }

        public void setReferenceSystem(int system) {

                super.setReferenceSystem(system);

                for (int i = 0; layers != null && i < layers.length; i++) {

                        layers[i].setReferenceSystem(system);

                }

        }

        /**

         *Returns the transparency of the multi layer fill symbol created

         */

        public int getFillAlpha() {

                // will compute the acumulated opacity

                double myAlpha = 0;

                for (int i = 0; layers != null && i < layers.length; i++) {

                        double layerAlpha = layers[i].getFillAlpha()/255D;

                        myAlpha += (1-myAlpha)*layerAlpha;

                }

                int result = (int) Math.round(myAlpha * 255);

                return (result>255) ? 255 : result;

        }

        public double toCartographicSize(ViewPort viewPort, double dpi, Geometry geom) {

                double size = 0;

                for (int i = 0; layers != null && i < layers.length; i++) {

                        size = Math.max(size, layers[i].toCartographicSize(viewPort, dpi, geom));

                }

                return size;

        }

        public Object clone() throws CloneNotSupportedException {

                MultiLayerFillSymbol copy = (MultiLayerFillSymbol) super.clone();

                // Clone layers

                if (layers != null) {

                        IFillSymbol[] layersCopy = new IFillSymbol[layers.length];

                        for (int i = 0; i < layers.length; i++) {

                                layersCopy[i] = (IFillSymbol) layers[i].clone();

                        }

                        copy.layers = layersCopy;

                }

                // Clone selection

                if (selectionSymbol != null) {

                        copy.selectionSymbol = (MultiLayerFillSymbol) selectionSymbol

                                        .clone();

                }

                return copy;

        }

        private void setSymbolForSelection(MultiLayerFillSymbol symbolForSelection) {

                this.selectionSymbol = symbolForSelection;

        }

        @SuppressWarnings("unchecked")

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent fill symbol properties

                super.loadFromState(state);

                // Set own properties

                // setSymbolForSelection((MultiLayerFillSymbol)

                // state.get(FIELD_SYMBOL_FOR_SELECTION));

                List layers = state.getList(FIELD_LAYERS);

                if (layers != null) {

                        for (int i = 0; i < layers.size(); i++) {

                                addLayer((ISymbol) layers.get(i));

                        }

                }

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent fill symbol properties

                super.saveToState(state);

                // Save own properties

                // Don't use the getSymbolForSelection method, as it will create it

                // if it does not exist, and persistence will enter an infinite loop

                // state.set(FIELD_SYMBOL_FOR_SELECTION, selectionSymbol);

                state.set(FIELD_LAYERS, layers);

        }

        public static void registerPersistence() {

                // Add the MultiLayerFillSymbol DynClass definition.

                PersistenceManager manager = ToolsLocator.getPersistenceManager();

                DynStruct definition = manager.addDefinition(

                                MultiLayerFillSymbol.class,

                                MULTILAYER_FILL_SYMBOL_DYNCLASS_NAME,

                                MULTILAYER_FILL_SYMBOL_DYNCLASS_NAME+" Persistence definition",

                                null, 

                                null

                );

                // Extend the FillSymbol base definition

                definition.extend(FILL_SYMBOL_DYNCLASS_NAME);

                // Selection Symbol

                // definition.addDynFieldSingle(FIELD_SYMBOL_FOR_SELECTION).setType(

                // DataTypes.OBJECT);

                // Layers

                definition.addDynFieldList(FIELD_LAYERS);

        }

}