Application: gvSIG desktop

/* gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana

 *

 * Copyright (C) 2007 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.

 */

package org.gvsig.raster.beans.previewbase;

import java.awt.Dimension;

import java.awt.Graphics2D;

import org.gvsig.fmap.raster.layers.FLyrRasterSE;

import org.gvsig.gui.beans.imagenavigator.IClientImageNavigator;

import org.gvsig.raster.datastruct.Extent;

import org.gvsig.raster.grid.filter.FilterTypeException;

import org.gvsig.raster.hierarchy.IRasterRendering;

import org.gvsig.raster.util.RasterToolsUtil;

import com.hardcode.gdbms.driver.exceptions.ReadDriverException;

import com.iver.andami.PluginServices;

import com.iver.cit.gvsig.fmap.ViewPort;

import com.iver.cit.gvsig.fmap.layers.FLayer;

/**

 * Gestor de visualizaci?n de preview. Se encarga del repintado de la imagen 

 * de la previsualizaci?n

 * 

 * 19/02/2008

 * @author Nacho Brodin nachobrodin@gmail.com

 */

public class PreviewRequestManager implements IClientImageNavigator {

        private PreviewBasePanel        previewBasePanel  = null;

        private FLyrRasterSE            previewLayer      = null;

        private IPreviewRenderProcess   renderProcess     = null; 

        /**

         * Construye un ColorTableListener

         * @param 

         */

        public PreviewRequestManager(        PreviewBasePanel panel, 

                                                                        IPreviewRenderProcess renderProcess, 

                                                                        FLyrRasterSE layer) {

                this.previewBasePanel = panel;

                this.renderProcess = renderProcess;

                setLayer(layer);

        }

        /**

         * Asigna la capa raster de la vista

         * @param fLayer

         */

        private void setLayer(FLayer fLayer) {

                if (fLayer instanceof FLyrRasterSE) {

                        try {

                                previewLayer = (FLyrRasterSE) fLayer.cloneLayer();

                        } catch (Exception e) {

                                RasterToolsUtil.messageBoxError("preview_not_available", previewBasePanel, e);

                        }

                }

        }

        /**

         * Cierra la capa abierta para previsualizaci?n

         */

        public void closePreviewLayer() {

                if (previewLayer != null) {

                        previewLayer.getDataSource().close();

                        previewLayer.setRemoveRasterFlag(true);

                }

        }

        /*

         * (non-Javadoc)

         * @see org.gvsig.gui.beans.imagenavigator.IClientImageNavigator#drawImage(java.awt.Graphics2D,

         *      double, double, double, double, double, int, int)

         */

        public void drawImage(Graphics2D g, double x1, double y1, double x2, double y2, double zoom, int width, int height) {

                if (previewLayer == null || !(previewLayer instanceof IRasterRendering))

                        return;

                IRasterRendering rendering = ((IRasterRendering) previewLayer);

                // Inicializo el ViewPort

                ViewPort vp = new ViewPort(null);

                Extent extent = new Extent(x1, y1, x2, y2);

                vp.setExtent(extent.toRectangle2D());

                vp.setImageSize(new Dimension(width, height));

                rendering.getRenderFilterList().pushStatus();

                try {

                        renderProcess.process(rendering);

                } catch (FilterTypeException e1) {

                        RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_adding_filters"), this, e1);

                }

                try {

                        previewLayer.draw(null, g, vp, null, 1.0);

                } catch (ReadDriverException e) {

                        RasterToolsUtil.messageBoxError(PluginServices.getText(this, "error_preview_render"), this, e);

                }

                rendering.getRenderFilterList().popStatus();

        }

}