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.extension;

import org.gvsig.andami.IconThemeHelper;

import org.gvsig.andami.PluginServices;

import org.gvsig.andami.plugins.Extension;

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

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

import org.gvsig.app.ApplicationLocator;

import org.gvsig.app.ApplicationManager;

import org.gvsig.app.gui.command.CommandStackDialog;

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

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

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

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

import org.gvsig.fmap.mapcontrol.MapControl;

import org.gvsig.tools.undo.RedoException;

import org.gvsig.tools.undo.UndoException;

/**

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

 * aplicados.

 *

 * @author Vicente Caballero Navarro

 */

public class UndoRedoViewExtension extends Extension {

    @Override

    public void initialize() {

        IconThemeHelper.registerIcon("action", "edit-undo", this);

        IconThemeHelper.registerIcon("action", "edit-redo", this);

        IconThemeHelper.registerIcon("action", "edit-undo-redo-actions", this);        

    }

    @Override

    public void execute(String s) {

        switch (s) {

            case "edit-undo-layer":

                undo();

                break;

            case "edit-redo-layer":

                redo();

                break;

            case "edit-undo-redo-actions-layer":

                showHistory();

                break;

        }

    }

    private void undo() {

        try {

            FLyrVect layer = getActiveAndEditingLayer();

            if (layer == null) {

                return;

            }

            if (!layer.getFeatureStore().canUndo()) {

                return;

            }

            ApplicationManager application = ApplicationLocator.getApplicationManager();

            IView vista = (IView) application.getActiveWindow();

            layer.getFeatureStore().undo();

            vista.getMapControl().drawMap(false);

            application.refreshMenusAndToolBars();

        } catch (UndoException ex) {

            logger.warn("Can't undo", ex);

        }

    }

    private void showHistory() {

        FLyrVect layer = getActiveAndEditingLayer();

        if (layer == null) {

            return;

        }

        ApplicationManager application = ApplicationLocator.getApplicationManager();

        MDIManager uiManager = application.getUIManager();

        FeatureStore featureStore = layer.getFeatureStore();

        CommandStackDialog csd = new CommandStackDialog();

        csd.setModel(featureStore);

        csd.setLabelModel(featureStore.getName());

        uiManager.addWindow(csd);

    }

    private void redo() {

        try {

            FLyrVect layer = getActiveAndEditingLayer();

            if (layer == null) {

                return;

            }

            if (!layer.getFeatureStore().canRedo()) {

                return;

            }

            ApplicationManager application = ApplicationLocator.getApplicationManager();

            IView vista = (IView) application.getActiveWindow();

            layer.getFeatureStore().redo();

            vista.getMapControl().drawMap(false);

            application.refreshMenusAndToolBars();

        } catch (RedoException ex) {

            logger.warn("Can't undo", ex);

        }

    }

    @Override

    public boolean canQueryByAction() {

        return true;

    }

    @Override

    public boolean isEnabled(String action) {

        FLyrVect layer = getActiveAndEditingLayer();

        switch (action) {

            case "edit-undo-layer":

                if (layer == null) {

                    return false;

                }

                return layer.getFeatureStore().canUndo();

            case "edit-redo-layer":

                if (layer == null) {

                    return false;

                }

                return layer.getFeatureStore().canRedo();

            case "edit-undo-redo-actions-layer":

                return true;

            default:

                return false;

        }

    }

    private FLyrVect getActiveAndEditingLayer() {

        ApplicationManager application = ApplicationLocator.getApplicationManager();

        IView vista = (IView) application.getActiveWindow();

        MapControl mapControl = vista.getMapControl();

        FLayer[] activeLayers = mapControl.getMapContext().getLayers().getActives();

        if (activeLayers.length != 1) {

            return null;

        }

        FLayer layer = activeLayers[0];

        if (layer instanceof FLyrVect && ((FLyrVect) layer).getFeatureStore().isEditing()) {

            return (FLyrVect) layer;

        }

        return null;

    }

    @Override

    public boolean isVisible(String action) {

        ApplicationManager application = ApplicationLocator.getApplicationManager();

        if(!(application.getActiveWindow() instanceof IView)) {

            return false;

        }

        return getActiveAndEditingLayer()!=null;

    }

    @Override

    public boolean isEnabled() {

        return true;

    }

    @Override

    public boolean isVisible() {

        return true;

    }

}