| gvSIG desktop 1

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

 *

 * Copyright (C) 2004 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.

 *

 * For more information, contact:

 *

 *  Generalitat Valenciana

 *   Conselleria d'Infraestructures i Transport

 *   Av. Blasco Ib??ez, 50

 *   46010 VALENCIA

 *   SPAIN

 *

 *      +34 963862235

 *   gvsig@gva.es

 *      www.gvsig.gva.es

 *

 *    or

 *

 *   IVER T.I. S.A

 *   Salamanca 50

 *   46005 Valencia

 *   Spain

 *

 *   +34 963163400

 *   dac@iver.es

 */

package com.iver.cit.gvsig;

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

import com.iver.andami.PluginServices;

import com.iver.andami.messages.NotificationManager;

import com.iver.andami.plugins.Extension;

import com.iver.cit.gvsig.exceptions.commands.EditionCommandException;

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

import com.iver.cit.gvsig.fmap.edition.VectorialEditableAdapter;

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

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

import com.iver.cit.gvsig.gui.cad.CADTool;

import com.iver.cit.gvsig.project.documents.view.gui.View;

/**

 * Extensi?n encargada de gestionar el deshacer los comandos anteriormente

 * aplicados.

 *

 * @author Vicente Caballero Navarro

 */

public class UndoViewExtension extends Extension {

        /**

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

         */

        public void initialize() {

                PluginServices.getIconTheme().registerDefault(

                                "view-undo",

                                this.getClass().getClassLoader().getResource("images/Undo.png")

                        );

        }

        /**

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

         */

        public void execute(String s) {

                View vista = (View) PluginServices.getMDIManager().getActiveWindow();

                if (s.compareTo("UNDO") == 0) {

                        undo(vista);

                }

        }

        private void undo(View vista) {

                MapControl mapControl = vista.getMapControl();

                try {

                        FLayers layers=mapControl.getMapContext().getLayers();

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

                                if (layers.getLayer(i) instanceof FLyrVect && layers.getLayer(i).isEditing() && layers.getLayer(i).isActive()){

                                        VectorialEditableAdapter vea=(VectorialEditableAdapter)((FLyrVect)layers.getLayer(i)).getSource();

                                        vea.undo();

                                        vea.getCommandRecord().fireCommandsRepaint(null);

                                        vea.getSelection().clear();

                                        CADTool cadTool=CADExtension.getCADTool();

                                        if (cadTool!=null)

                                                cadTool.clearSelection();

                                }

                        }

                } catch (EditionCommandException e) {

                        NotificationManager.addError(e.getMessage(),e);

                } catch (ReadDriverException e) {

                        NotificationManager.addError(e.getMessage(),e);

                }

        }

        /**

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

         */

        public boolean isEnabled() {

                View vista = (View) PluginServices.getMDIManager().getActiveWindow();

                MapControl mapControl = vista.getMapControl();

                FLayers layers=mapControl.getMapContext().getLayers();

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

                        if (layers.getLayer(i) instanceof FLyrVect && ((FLyrVect)layers.getLayer(i)).getSource() instanceof VectorialEditableAdapter && layers.getLayer(i).isEditing() && layers.getLayer(i).isActive()){

                                VectorialEditableAdapter vea=(VectorialEditableAdapter)((FLyrVect)layers.getLayer(i)).getSource();

                                if (vea==null)return false;

                                return vea.getCommandRecord().moreUndoCommands();

                        }

                }

                return false;

        }

        /**

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

         */

        public boolean isVisible() {

                com.iver.andami.ui.mdiManager.IWindow f = PluginServices.getMDIManager()

                                                                                                                         .getActiveWindow();

                if (f == null) {

                        return false;

                }

                if (f instanceof View) {

                        MapControl mapControl = ((View)f).getMapControl();

                        FLayers layers=mapControl.getMapContext().getLayers();

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

                                if (layers.getLayer(i) instanceof FLyrVect && ((FLyrVect)layers.getLayer(i)).getSource() instanceof VectorialEditableAdapter && layers.getLayer(i).isEditing() && layers.getLayer(i).isActive()){

                                        VectorialEditableAdapter vea=(VectorialEditableAdapter)((FLyrVect)layers.getLayer(i)).getSource();

                                        if (vea==null)return false;

                                        return true;

                                }

                        }

                }

                return false;

        }

}