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.app.gui.styling;

import java.awt.Color;

import java.awt.Font;

import java.awt.FontMetrics;

import java.awt.Graphics;

import java.awt.Graphics2D;

import java.awt.Rectangle;

import org.apache.commons.lang3.mutable.MutableObject;

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

import org.gvsig.fmap.mapcontext.MapContextLocator;

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

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

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

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

import org.gvsig.i18n.Messages;

/**

* Defines the properties of the symbols that are showed in the

* SymbolPreviewer panel.Also the user has methods to set this attributes.

*

* @author gvSIG Team

*

*/

public class StylePreviewer extends SymbolPreviewer{

        /**

         * 

         */

        private static final long serialVersionUID = -1690697926703748637L;

        private int hGap, vGap;

        private IStyle style;

        private boolean showOutline;

        /**

         * Constructor method

         *

     * @param feature

         */

        public StylePreviewer(MutableObject<Feature> feature) {

                super(feature);

                initialize();

        }

        public StylePreviewer() {

                super();

                initialize();

        }

        private void initialize() {

            this.hGap = 5;

            this.vGap = 5;

            setBackground(Color.WHITE);

        }

        /**

         * Obtains the style of the symbol showed in the SymbolPreviewer panel

         * @return style,IStyle

         */

        public IStyle getStyle() {

                return style;

        }

        public void setShowOutline(boolean so) {

                this.showOutline = so;

        }

        @Override

        public ISymbol getSymbol() {

                throw new Error(Messages.getText("undefined_for_StylePreviewer_use")

                                +" getStyle() "+

                                Messages.getText("instead") );

        }

        @Override

        public void setSymbol(ISymbol symbol) {

                throw new Error(Messages.getText("undefined_for_StylePreviewer_use")

                                +" setStyle(IStyle) "+

                                Messages.getText("instead") );

        }

        /**

         * Defines the style of the symbol showed in the SymbolPreviewer panel

         * @param style,IStyle

         */

        public void setStyle(IStyle style) {

                this.style = style;

        }

        @Override

        public void paint(Graphics g) {

                Graphics2D g2 = (Graphics2D) g;

                Rectangle r = getBounds();

                g2.translate(hGap, vGap);

                r = new Rectangle(0, 0, (int) (r.getWidth()-(hGap*2)), (int) (r.getHeight()-(vGap*2)));

                if (style != null) {

                        try {

                                if (showOutline) {

                                        // this is a trick for the editor

                                        style.drawOutline(g2, r);

                                } else {

                                        style.drawInsideRectangle(g2, r);

                                }

                        } catch (SymbolDrawingException e) {

                                if (e.getType() == SymbolDrawingException.UNSUPPORTED_SET_OF_SETTINGS) {

                                        try {

                                                IWarningSymbol warning =

                                                                (IWarningSymbol) MapContextLocator.getSymbolManager()

                                                                                .getWarningSymbol(

                                                                                                SymbolDrawingException.STR_UNSUPPORTED_SET_OF_SETTINGS,

                                                                                                "",

                                                                                                SymbolDrawingException.UNSUPPORTED_SET_OF_SETTINGS);

                                                warning.drawInsideRectangle(g2, null, r);

                                        } catch (SymbolDrawingException e1) {

                                                // IMPOSSIBLE TO REACH THIS

                                        }

                                } else {

                                        // should be unreachable code

                                        throw new Error(Messages.getText("symbol_shapetype_mismatch"));

                                }

                        }

                } else {

                        String noneSelected = "["+Messages.getText("preview_not_available")+"]";

                        FontMetrics fm = g2.getFontMetrics();

                        int lineWidth = fm.stringWidth(noneSelected);

                        float scale = (float) r.getWidth() / lineWidth;

                        Font f = g2.getFont();

                        float fontSize = f.getSize()*scale;

                        g2.setFont(        f.deriveFont( fontSize ) );

                        g2.drawString(noneSelected,         (r.x*scale) - (hGap/2), r.height/2+vGap*scale);

                }

        }

        public int getHGap() {

                return hGap;

        }

        public int getVGap() {

                return vGap;

        }

}