Application: gvSIG desktop

package org.gvsig.selectiontools.app.extension;

/* 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.

 *

 */

import java.util.ArrayList;

import javax.swing.JOptionPane;

import org.gvsig.andami.IconThemeHelper;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.plugins.Extension;

import org.gvsig.andami.ui.mdiManager.IWindow;

import org.gvsig.app.project.documents.view.ViewDocument;

import org.gvsig.app.project.documents.view.gui.IView;

import org.gvsig.fmap.dal.exception.DataException;

import org.gvsig.fmap.mapcontext.MapContext;

import org.gvsig.fmap.mapcontext.layers.FLayer;

import org.gvsig.fmap.mapcontext.layers.vectorial.FLyrVect;

import org.gvsig.selectiontools.app.extension.tools.buffer.gui.BufferConfigurationPanel;

/**

 * <p>

 * Extension to add support for selecting the geometries of the active vector

 * layers that intersect with a buffer around their previously selected

 * geometries.

 * </p>

 *

 * @author Pablo Piqueras Bartolom? (pablo.piqueras@iver.es)

 */

public class SelectByBufferExtension extends Extension {

    public static final String BUFFER_SELECTION_TOOL_NAME = "bufferSelection";

    /*

     * @see com.iver.andami.plugins.IExtension#initialize()

     */

    public void initialize() {

            IconThemeHelper.registerIcon("action", "selection-select-by-buffer", this);

            IconThemeHelper.registerIcon("cursor", "cursor-select-by-buffer", this);

    }

    /*

     * (non-Javadoc)

     *

     * @see com.iver.andami.plugins.IExtension#execute(java.lang.String)

     */

    public void execute(String actionCommand) {

        if (actionCommand.equals("SELBUFFER")) {

            IWindow win = PluginServices.getMDIManager().getActiveWindow();

            if (win instanceof IView) {

                IView view = (IView) win;

                ViewDocument model = view.getViewDocument();

                /*

                 * Unavaliable tool with views in geographic projections

                 */

                if (!view.getMapControl().getProjection().isProjected()) {

                    JOptionPane.showMessageDialog(null,

                        PluginServices.getText(null,

                            "Tool_unavaliable_with_view_in_geographic_projection"),

                        PluginServices.getText(this, "Warning"),

                        JOptionPane.ERROR_MESSAGE);

                    return;

                }

                MapContext mapContext = model.getMapContext();

                // If there is at least one active vector layer that has

                // geometries selected -> can use this tool, otherwise notifies

                // the

                // limitation in a JOptionPane

                FLayer layers[] = mapContext.getLayers().getActives();

                FLayer layer;

                ArrayList<FLyrVect> usefulLayers = new ArrayList<FLyrVect>();

                int emptySelectionLayers = 0;

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

                    layer = layers[i];

                    if ((layer instanceof FLyrVect) && (layer.isAvailable())

                        && (layer.isActive())) {

                        usefulLayers.add((FLyrVect) layer);

                        try {

                            if (((FLyrVect) layer).getFeatureStore()

                                .getFeatureSelection()

                                .isEmpty()) {

                                emptySelectionLayers++;

                            }

                        } catch (DataException e) {

                            JOptionPane.showMessageDialog(null,

                                PluginServices.getText(null,

                                    "Failed_selecting_layer")

                                    + ": "

                                    + layer.getName(),

                                PluginServices.getText(null, "Warning"),

                                JOptionPane.WARNING_MESSAGE);

                        }

                    }

                }

                if (usefulLayers.size() == 0

                    || emptySelectionLayers == usefulLayers.size()) {

                    JOptionPane.showMessageDialog(null,

                        PluginServices.getText(null,

                            "There_are_no_geometries_selected"),

                        PluginServices.getText(null, "Warning"),

                        JOptionPane.WARNING_MESSAGE);

                    return;

                }

                // Creates and displays the configuration panel

                PluginServices.getMDIManager()

                    .addWindow(new BufferConfigurationPanel((FLyrVect[]) usefulLayers.toArray(new FLyrVect[0]),

                        view));

            }

        }

    }

    /*

     * @see com.iver.andami.plugins.IExtension#isVisible()

     */

    public boolean isVisible() {

        IWindow f = PluginServices.getMDIManager().getActiveWindow();

        if (f == null) {

            return false;

        }

        if (f instanceof IView) {

            IView vista = (IView) f;

            ViewDocument model = vista.getViewDocument();

            MapContext mapa = model.getMapContext();

            return mapa.getLayers().getLayersCount() > 0;

        }

        return false;

    }

    /*

     * @see com.iver.andami.plugins.IExtension#isEnabled()

     */

    public boolean isEnabled() {

        IWindow f = PluginServices.getMDIManager().getActiveWindow();

        if (f == null) {

            return false;

        }

        if (f instanceof IView) {

            IView vista = (IView) f;

            ViewDocument model = vista.getViewDocument();

            /*

             * Unavaliable tool with views in geographic projections

             */

            if (!(vista.getMapControl().getProjection().isProjected())) {

                return false;

            }

            MapContext mapa = model.getMapContext();

            FLayer layers[] = mapa.getLayers().getActives();

            FLayer layer;

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

                layer = layers[i];

                if ((layer instanceof FLyrVect) && (layer.isAvailable())

                    && (layer.isActive()))

                    return true;

            }

        }

        return false;

    }

}