Application: gvSIG desktop

/**

 * gvSIG. Desktop Geographic Information System.

 *

 * Copyright (C) 2007-2013 gvSIG Association.

 *

 * 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 3

 * 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.

 *

 * For any additional information, do not hesitate to contact us

 * at info AT gvsig.com, or visit our website www.gvsig.com.

 */

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

import java.awt.BasicStroke;

import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import java.awt.RenderingHints;

import java.awt.Shape;

import java.awt.font.FontRenderContext;

import java.awt.font.GlyphVector;

import java.awt.geom.AffineTransform;

import java.awt.geom.Rectangle2D;

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

import org.gvsig.fmap.geom.Geometry;

import org.gvsig.fmap.geom.Geometry.SUBTYPES;

import org.gvsig.fmap.geom.GeometryLocator;

import org.gvsig.fmap.geom.GeometryManager;

import org.gvsig.fmap.geom.exception.CreateGeometryException;

import org.gvsig.fmap.geom.primitive.GeneralPathX;

import org.gvsig.fmap.geom.primitive.Point;

import org.gvsig.fmap.mapcontext.MapContextLocator;

import org.gvsig.fmap.mapcontext.ViewPort;

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

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

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

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

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.impl.AbstractSymbol;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.impl.CartographicSupportToolkit;

import org.gvsig.symbology.fmap.mapcontext.rendering.symbol.text.ISimpleTextSymbol;

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;

import org.gvsig.tools.util.Callable;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

/**

 * SimpleTextSymbol is a class used to create symbols composed using a text defined by

 * the user.This text can be edited (changing the color, the font of the characters, and

 * the rotation of the text).

 * @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 SimpleTextSymbol extends AbstractSymbol implements ITextSymbol, ISimpleTextSymbol {

        final static private Logger LOG = LoggerFactory.getLogger(SimpleTextSymbol.class);

        public static final String SIMPLE_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME = "SimpleTextSymbol";

        private static final String FIELD_TEXT = "text";

        private static final String FIELD_FONT = "font";

        private static final String FIELD_TEXT_COLOR = "textColor";

        private static final String FIELD_ROTATION = "rotation";

        private static final String FIELD_AUTO_RESIZE = "autoResize";

        private static final String FIELD_HAS_HALO = "hasHalo";

        private static final String FIELD_HALO_COLOR = "haloColor";

        private static final String FIELD_HALO_WIDTH = "haloWidth";

        /*

         * This value must be get using getText() if the 'null'

         * value has to prevented

         */

        private String text = "";

        private Font font;

        private Color haloColor = Color.WHITE;

        private float haloWidth = 3;

        private boolean drawWithHalo = false;

        private BasicStroke haloStroke = new BasicStroke(

                        6, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);

        private Color textColor;

        private double rotation;

        private final FontRenderContext frc = new FontRenderContext(

                        new AffineTransform(), false, true);

        private boolean autoresize;

        public SimpleTextSymbol() {

                super();

                SymbolPreferences preferences =

                                MapContextLocator.getSymbolManager().getSymbolPreferences();

                font = preferences.getDefaultSymbolFont();

                textColor = preferences.getDefaultSymbolColor();

        }

    @Override

    public void draw(Graphics2D g, AffineTransform affineTransform, Geometry geom, Feature f, Cancellable cancel, Rectangle r) {

        if (!isShapeVisible()) {

            return;

        }

        Point point;

        if (r != null) {

            point = this.getSamplePoint(r);

        } else {

            try {

                point = geom.centroid();

            } catch (Exception ex) {

                throw new RuntimeException("Can't get centroid of geometry.", ex);

            }

        }

        Font theFont = this.getFont();

        if (autoresize && r != null) {

            int sz = theFont.getSize();

            if (sz == 0) {

                sz = 1;

                theFont = new Font(theFont.getName(), theFont.getStyle(), sz);

            }

            g.setFont(theFont);

            FontMetrics fm = g.getFontMetrics();

            Rectangle2D rect = fm.getStringBounds(getText(), g);

            double width = rect.getWidth();

            double height = rect.getHeight();

            double rWidth = r.getWidth();

            double rHeight = r.getHeight();

            double ratioText = width / height;

            double ratioRect = rWidth / rHeight;

            if (ratioText > ratioRect) {

                sz = (int) (sz * (rWidth / width));

            } else {

                sz = (int) (sz * (rHeight / height));

            }

            theFont = new Font(theFont.getName(), theFont.getStyle(), sz);

        } else {

            if(!isInPixels()){

                theFont = new Font(theFont.getName(), theFont.getStyle(), (int) toCartographicUnits(theFont.getSize()));

            }

        }

        point.transform(affineTransform);

        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);

        g.translate(point.getX(), point.getY());

        g.rotate(rotation);

        if (isDrawWithHalo()) {

            char[] charText = new char[getText().length()];

            getText().getChars(0, charText.length, charText, 0);

            GlyphVector glyph = theFont.layoutGlyphVector(frc, charText, 0, charText.length, Font.LAYOUT_NO_LIMIT_CONTEXT);

            g.setColor(getHaloColor());

            g.setStroke(haloStroke);

            g.draw(glyph.getOutline());

        }

        // Rectangle2D bounds = getBounds();

//                 getBounds devuelve el bounds de un texto dibujado de manera que

        // la linea base de la primera letra est? en el punto (0,0).

        // Por eso, si queremos alinear el texto de manera que la parte superior

        // izquierda de la primera letra est? en (0,0) debemos moverlo seg?n

        // el valor de la ordenada, en lugar de seg?n su altura.

        g.setColor(textColor);

        g.setFont(theFont);

        g.drawString(getText(), 0, 0);//(int) bounds.getHeight());

        g.rotate(-rotation);

        g.translate(-point.getX(), -point.getY());

    }

//        @Override

//        public int getOnePointRgb() {

//                return textColor.getRGB();

//        }

//

//        @Override

//        public void getPixExtentPlus(org.gvsig.fmap.geom.Geometry geom, float[] distances,

//                        ViewPort viewPort, int dpi) {

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

//

//        }

        @Override

        public ISymbol getSymbolForSelection() {

                return this; // a text is not selectable

        }

        @Override

        public int getSymbolType() {

                //This method returned the deleted type Geometry.TYPES.TEXT. I suppose that now

            //it has to retrun geometry

            return Geometry.TYPES.GEOMETRY;

        }

        @Override

        public boolean isSuitableFor(Geometry geom) {

                return true;

        }

        public String getClassName() {

                return getClass().getName();

        }

        @Override

        public String getText() {

            if (text == null) {

                return "";

            } else {

                return text;

            }

        }

        @Override

        public Font getFont() {

                return font;

        }

        @Override

        public Color getTextColor() {

                return textColor;

        }

        @Override

        public void setText(String text) {

                this.text = text;

        }

        @Override

        public void setFont(Font font) {

                if (font == null) {

                        LOG.warn("font <-- null");

                        return;

                }

                this.font = font;

        }

        @Override

        public void setTextColor(Color color) {

                this.textColor = color;

        }

        @Override

        public Color getColor() {

                return getTextColor();

        }

        @Override

        public void setColor(Color color) {

                setTextColor(color);

        }

        @Override

        public void setFontSize(double size) {

                Font newFont = new Font(font.getName(), font.getStyle(), (int) size);

                this.font = newFont;

        }

        @Override

        public double getRotation() {

                return rotation;

        }

        /**

         * Defines the angle of rotation for the text that composes the symbol

         *

         * @param rotation

         */

        @Override

        public void setRotation(double rotation) {

                this.rotation = rotation;

        }

        /**

         * Returns an Geometry which represents a rectangle containing the text in

         * <b>screen</b> units.

         */

        @Override

        public Geometry getTextWrappingShape(org.gvsig.fmap.geom.primitive.Point p) {

                GeometryManager geomManager = GeometryLocator.getGeometryManager();

                Font theFont = getFont();

                GlyphVector gv = theFont.createGlyphVector(frc, getText());

                Shape shape = gv.getOutline((float) p.getX(), (float) p.getY());

                Geometry myFShape;

                try {

                        myFShape = geomManager.createSurface(new GeneralPathX(shape

                                        .getBounds2D().getPathIterator(null)), SUBTYPES.GEOM2D);

                        myFShape.transform(AffineTransform.getTranslateInstance(p.getX(), p.getY()));

                        if (rotation != 0) {

                                myFShape.transform(AffineTransform.getRotateInstance(rotation));

                        }

                        return myFShape;

                } catch (CreateGeometryException e) {

                        LOG.error("Error creating a surface", e);

                }

                return null;

        }

        @Override

        public Rectangle getBounds() {

            GeometryManager geomManager = GeometryLocator.getGeometryManager();

                Rectangle bounds = null;

                try {

                        bounds = getTextWrappingShape(geomManager.createPoint(0,0, SUBTYPES.GEOM2D)).getShape().getBounds();

                } catch (CreateGeometryException e) {

                        LOG.error("Error creating a point", e);

                }

                return bounds;

        }

        public void setCartographicSize(double cartographicSize, Geometry geom) {

                setFontSize(cartographicSize);

        }

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

                double oldSize = getFont().getSize();

                setCartographicSize(getCartographicSize(

                                                                viewPort,

                                                                dpi,

                                                                geom),

                                                        geom);

                return oldSize;

        }

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

                return CartographicSupportToolkit.

                                        getCartographicLength(this,

                                                                                  getFont().getSize(),

                                                                                  viewPort,

                                                                                  dpi);

        }

        @Override

        public boolean isAutoresizeEnabled() {

                return autoresize;

        }

        @Override

        public void setAutoresizeEnabled(boolean autoresizeFlag) {

                this.autoresize = autoresizeFlag;

        }

        @Override

        public Object clone() throws CloneNotSupportedException {

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

                return copy;

        }

        @Override

        public void loadFromState(PersistentState state)

                        throws PersistenceException {

                // Set parent fill symbol properties

                super.loadFromState(state);

                // Set own properties

                setAutoresizeEnabled(state.getBoolean(FIELD_AUTO_RESIZE));

                setFont((Font) state.get(FIELD_FONT));

                setRotation(state.getDouble(FIELD_ROTATION));

                setText(state.getString(FIELD_TEXT));

                setTextColor((Color) state.get(FIELD_TEXT_COLOR));

                // halo

                this.setDrawWithHalo(state.getBoolean(FIELD_HAS_HALO));

                this.setHaloColor((Color) state.get(FIELD_HALO_COLOR));

                this.setHaloWidth(state.getFloat(FIELD_HALO_WIDTH));

        }

        @Override

        public void saveToState(PersistentState state) throws PersistenceException {

                // Save parent fill symbol properties

                super.saveToState(state);

                // Save own properties

                state.set(FIELD_AUTO_RESIZE, isAutoresizeEnabled());

                state.set(FIELD_FONT, getFont());

                state.set(FIELD_ROTATION, getRotation());

                state.set(FIELD_TEXT, getText());

                state.set(FIELD_TEXT_COLOR, getTextColor());

                // halo

                state.set(FIELD_HAS_HALO, this.isDrawWithHalo());

                state.set(FIELD_HALO_COLOR, this.getHaloColor());

                state.set(FIELD_HALO_WIDTH, this.getHaloWidth());

        }

        public static class RegisterPersistence implements Callable {

                @Override

                public Object call() throws Exception {

                        PersistenceManager manager = ToolsLocator.getPersistenceManager();

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

                                DynStruct definition = manager.addDefinition(

                                                SimpleTextSymbol.class,

                                                SIMPLE_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME,

                                                SIMPLE_TEXT_SYMBOL_PERSISTENCE_DEFINITION_NAME+" Persistence definition",

                                                null,

                                                null

                                );

                                // Extend the Symbol base definition

                                definition.extend(manager.getDefinition(SYMBOL_PERSISTENCE_DEFINITION_NAME));

                                // Auto resize?

                                definition.addDynFieldBoolean(FIELD_AUTO_RESIZE)

                                        .setMandatory(true);

                                // Font

                                definition.addDynFieldObject(FIELD_FONT)

                                        .setClassOfValue(Font.class)

                                        .setMandatory(true);

                                // Rotation

                                definition.addDynFieldDouble(FIELD_ROTATION)

                                        .setMandatory(true);

                                // Text

                                definition.addDynFieldString(FIELD_TEXT);

                                // Text color

                                definition.addDynFieldObject(FIELD_TEXT_COLOR)

                                        .setClassOfValue(Color.class)

                                        .setMandatory(true);

                                // halo

                                definition.addDynFieldBoolean(FIELD_HAS_HALO).setMandatory(true);

                                definition.addDynFieldObject(FIELD_HALO_COLOR).setClassOfValue(

                                                Color.class).setMandatory(true);

                                definition.addDynFieldFloat(FIELD_HALO_WIDTH).setMandatory(true);

                        }

                        return Boolean.TRUE;

                }

        }

        public static class RegisterSymbol implements Callable {

                @Override

                public Object call() throws Exception {

                        int[] shapeTypes;

                        SymbolManager manager = MapContextLocator.getSymbolManager();

                        //This method registered the deleted type Geometry.TYPES.TEXT. I suppose that now

                //it has to register geometry

                shapeTypes = new int[] { Geometry.TYPES.GEOMETRY };

                manager.registerSymbol(ITextSymbol.SYMBOL_NAME,

                    shapeTypes,

                    SimpleTextSymbol.class);

                        return Boolean.TRUE;

                }

        }

        @Override

        public Color getHaloColor() {

                return haloColor;

        }

        @Override

        public void setHaloColor(Color co) {

                if (co != null) {

                        this.haloColor = co;

                }

        }

        @Override

        public float getHaloWidth() {

                return haloWidth;

        }

        @Override

        public void setHaloWidth(float haloWidth) {

                this.haloWidth = haloWidth;

                this.haloStroke = new BasicStroke(

                                2*haloWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);

        }

        @Override

        public boolean isDrawWithHalo() {

                return drawWithHalo;

        }

        @Override

        public void setDrawWithHalo(boolean drawWithHalo) {

                this.drawWithHalo = drawWithHalo;

        }

    protected Point getSamplePoint(Rectangle r) {

        GeometryManager geomManager = GeometryLocator.getGeometryManager();

        try {

            return geomManager.createPoint(

                    r.getMinX(),

                    // Small adjustment to center the fonts

                    r.getMinY() + 0.725 * r.getHeight(),

                    SUBTYPES.GEOM2D);

        } catch (Exception e) {

            throw new RuntimeException("Can't create sample point.", e);

        }

    }

}