| 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.marker.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.Arrays;

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.geom.primitive.Point;

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.marker.IMarkerSymbol;

import org.gvsig.tools.ToolsLocator;

import org.gvsig.tools.dynobject.DynClass;

import org.gvsig.tools.persistence.PersistenceException;

import org.gvsig.tools.persistence.PersistentState;

import org.gvsig.tools.task.Cancellable;

import org.gvsig.utils.XMLEntity;

import org.gvsig.utils.XMLException;

/**

 * MultiLayerMarkerSymbol allows to group several marker symbols (xxxMarkerSymbol

 * implementing IMarkerSymbol)in one and treat it as an only one symbol.

 *

 * @author 2005-2008 jaume dominguez faus - jaume.dominguez@iver.es

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

 */

public class MultiLayerMarkerSymbol extends AbstractMarkerSymbol implements IMarkerSymbol, IMultiLayerSymbol {

    public static final String MULTILAYER_MARKER_SYMBOL_DYNCLASS_NAME = "MultiLayerMarkerSymbol";

    private static final String FIELD_LAYERS = "layers";

    private static final String FIELD_ROTATION = "rotation";

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

        private MultiLayerMarkerSymbol selectionSymbol;

        private double markerSize;

        private double rotation;

        public Color getColor() {

                /*

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

                 * of each layer is defined by the layer itself

                 */

                return null;

        }

        public double getRotation() {

                return rotation;

        }

        public void setColor(Color color) {

                /*

                 * will apply the color to each layer

                 */

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

                        layers[i].setColor(color);

                }

        }

        public void setRotation(double rotation) {

                this.rotation = rotation;

        }

        public double getSize() {

                double myMarkerSize = 0;

                for (int i = 0; i < getLayerCount(); i++) {

                        myMarkerSize = Math.max(myMarkerSize, ((IMarkerSymbol) getLayer(i)).getSize());

                }

                if (markerSize != myMarkerSize) {

                        markerSize = myMarkerSize;

                }

                return markerSize;

        }

        public void setSize(double size) {

                if (size > 0 && size != getSize()) {

                        double scale = size / getSize();

                        this.markerSize = size;

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

                                double lSize = layers[i].getSize();

                                layers[i].setSize(lSize*scale);

                        }

                }

        }

        public void draw(Graphics2D g, AffineTransform affineTransform,

                        Geometry geom, Feature feature, Cancellable cancel) {

                Point p = (Point) geom;

                g.rotate(rotation, p.getX(), p.getY());

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

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

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

                }

                g.rotate(-rotation, p.getX(), p.getY());

        }

        public void drawInsideRectangle(Graphics2D g, AffineTransform scaleInstance, Rectangle r, PrintAttributes properties) throws SymbolDrawingException {

                g.rotate(rotation, r.getCenterX(), r.getCenterY());

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

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

                }

                g.rotate(-rotation, r.getCenterX(), r.getCenterY());

        }

        public int getOnePointRgb() {

                // will paint only the last layer pixel

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

        }

        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() {

                if (selectionSymbol == null) {

                        selectionSymbol = new MultiLayerMarkerSymbol();

                        selectionSymbol.setDescription(getDescription());

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

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

                        }

                }

                return selectionSymbol;

        }

        public XMLEntity getXMLEntity() throws XMLException {

                XMLEntity xml = new XMLEntity();

//                xml.putProperty("className", getClass().getName());

//                xml.putProperty("isShapeVisible", isShapeVisible());

//                xml.putProperty("desc", getDescription());

//                xml.putProperty("size",        getSize());

//                xml.putProperty("unit", getUnit());

//                xml.putProperty("referenceSystem", getReferenceSystem());

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

//                        xml.addChild(layers[i].getXMLEntity());

//                }

                return xml;

        }

        public boolean isSuitableFor(Geometry geom) {

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

        }

        public String getClassName() {

                return getClass().getName();

        }

        /**

         * TODO: replace with the new Persistence API

         */

        public void setXMLEntity(XMLEntity xml) {

//                setIsShapeVisible(xml.getBooleanProperty("isShapeVisible"));

//                setDescription(xml.getStringProperty("desc"));

//                setSize(xml.getDoubleProperty("size"));

//                setUnit(xml.getIntProperty("unit"));

//                setReferenceSystem(xml.getIntProperty("referenceSystem"));

//                for (int i = 0; i < xml.getChildrenCount(); i++) {

//                        addLayer(SymbologyFactory.createSymbolFromXML(xml.getChild(i), "layer" + i));

//                }

        }

        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] = (IMarkerSymbol) layer;

        }

        public void swapLayers(int index1, int index2) {

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

                layers[index2] = (IMarkerSymbol) aux1;

                layers[index1] = (IMarkerSymbol) 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

                }

                IMarkerSymbol newMarker = (IMarkerSymbol) newLayer;

                if (getLayerCount() == 0) {

                        // apply the new layer properties to this multilayer

                        setReferenceSystem(newMarker.getReferenceSystem());

                        markerSize = newMarker.getSize();

                        //setSize(newMarker.getSize());

                        setUnit(newMarker.getUnit());

                } else {

                        if (newMarker.getSize() > getSize()) {

                                //setSize(newMarker.getSize());

                                markerSize = newMarker.getSize();

                        }

                        newMarker.setReferenceSystem(getReferenceSystem());

                        newMarker.setUnit(getUnit());

                }

                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 = (IMarkerSymbol[]) newLayers.toArray(new IMarkerSymbol[0]);

                } catch (ArrayStoreException asEx) {

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

                }

        }

        public boolean removeLayer(ISymbol layer) {

                int capacity = 0;

                capacity = layers.length;

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

                for (int i = 0; i < capacity; i++) {

                        lst.add(layers[i]);

                }

                boolean contains = lst.remove(layer);

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

                return contains;

        }

        public void setUnit(int unit) {

                super.setUnit(unit);

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

                        layers[i].setUnit(unit);

                }

        }

        public void setReferenceSystem(int system) {

                super.setReferenceSystem(system);

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

                        layers[i].setReferenceSystem(system);

                }

        }

        public void setAlpha(int alpha) {

                // first, get the biggest alpha in the layers and the index if such layer

                int maxAlpha = Integer.MIN_VALUE;

                int maxAlphaLayerIndex = 0;

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

                        if (layers[i].getColor().getAlpha() > maxAlpha) {

                                maxAlpha = layers[i].getColor().getAlpha();

                                maxAlphaLayerIndex = i;

                        }

                }

                // now, max alpha takes the value of the desired alpha and the rest

                // will take a scaled (to biggest alpha) alpha value

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

                        int r = layers[i].getColor().getRed();

                        int g = layers[i].getColor().getGreen();

                        int b = layers[i].getColor().getBlue();

                        if (i!=maxAlphaLayerIndex) {

                                double scaledAlpha = (double) layers[i].getColor().getAlpha()/maxAlpha;

                                int myAlpha = (int) (alpha*scaledAlpha);

                                if (myAlpha == 0) {

                                        myAlpha = 1;

                                }

                                layers[i].setColor(new Color(r, g, b, myAlpha));

                        } else {

                                int myAlpha = alpha;

                                if (myAlpha == 0) {

                                        myAlpha = 1;

                                }

                                layers[i].setColor(new Color(r, g, b, myAlpha));

                        }

                }

        }

        public Object clone() throws CloneNotSupportedException {

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

                // Clone layers

                if (layers != null) {

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

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

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

                        }

                        copy.layers = layersCopy;

                }

                // Clone selection

                if (selectionSymbol != null) {

                        copy.selectionSymbol = (MultiLayerMarkerSymbol) selectionSymbol

                                        .clone();

                }

                return copy;

        }

        @SuppressWarnings("unchecked")

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent fill symbol properties

                super.loadFromState(state);

                // Set own properties

                List layers = state.getList(FIELD_LAYERS);

                if (layers != null) {

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

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

                        }

                }

                setRotation(state.getDouble(FIELD_ROTATION));

        }

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent fill symbol properties

                super.saveToState(state);

                // Save own properties

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

                        state.set(FIELD_LAYERS, Arrays.asList(layers));

                }

                state.set(FIELD_ROTATION, getRotation());

        }

        public static void registerPersistence() {

                // Add the MultiLayerMarkerSymbol DynClass definition.

                DynClass dynClass = ToolsLocator.getDynObjectManager().add(

                                MULTILAYER_MARKER_SYMBOL_DYNCLASS_NAME);

                // Extend the MarkerSymbol base definition

                dynClass.extend(MARKER_SYMBOL_DYNCLASS_NAME);

                // Layers

                dynClass.addDynFieldList(FIELD_LAYERS);

                // Rotation

                dynClass.addDynFieldDouble(FIELD_ROTATION).setMandatory(true);

                // Register in persistence

                ToolsLocator.getPersistenceManager().registerClass(

                                MultiLayerMarkerSymbol.class, dynClass);

        }

}