ViewportWidget.java

/**
 *
 *    geo-platform
 *    Rich webgis framework
 *    http://geo-platform.org
 *   ====================================================================
 *
 *   Copyright (C) 2008-2017 geoSDI Group (CNR IMAA - Potenza - ITALY).
 *
 *   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, see http://www.gnu.org/licenses/
 *
 *   ====================================================================
 *
 *   Linking this library statically or dynamically with other modules is
 *   making a combined work based on this library. Thus, the terms and
 *   conditions of the GNU General Public License cover the whole combination.
 *
 *   As a special exception, the copyright holders of this library give you permission
 *   to link this library with independent modules to produce an executable, regardless
 *   of the license terms of these independent modules, and to copy and distribute
 *   the resulting executable under terms of your choice, provided that you also meet,
 *   for each linked independent module, the terms and conditions of the license of
 *   that module. An independent module is a module which is not derived from or
 *   based on this library. If you modify this library, you may extend this exception
 *   to your version of the library, but you are not obligated to do so. If you do not
 *   wish to do so, delete this exception statement from your version.
 */
package org.geosdi.geoplatform.gui.client.widget.viewport;

import com.extjs.gxt.ui.client.Style;
import com.extjs.gxt.ui.client.widget.ContentPanel;
import com.extjs.gxt.ui.client.widget.layout.FlowLayout;
import java.util.List;
import org.geosdi.geoplatform.gui.client.command.LoadViewportsRequest;
import org.geosdi.geoplatform.gui.client.command.LoadViewportsResponse;
import org.geosdi.geoplatform.gui.client.i18n.MapModuleConstants;
import org.geosdi.geoplatform.gui.client.i18n.windows.WindowsConstants;
import org.geosdi.geoplatform.gui.client.widget.GeoPlatformWindow;
import org.geosdi.geoplatform.gui.client.widget.SearchStatus;
import org.geosdi.geoplatform.gui.command.api.GPClientCommand;
import org.geosdi.geoplatform.gui.command.api.GPClientCommandExecutor;
import org.geosdi.geoplatform.gui.configuration.map.client.GPClientViewport;
import org.geosdi.geoplatform.gui.configuration.map.client.GPCoordinateReferenceSystem;
import org.geosdi.geoplatform.gui.configuration.map.client.geometry.BBoxClientInfo;
import org.geosdi.geoplatform.gui.configuration.map.puregwt.MapHandlerManager;
import org.geosdi.geoplatform.gui.configuration.map.puregwt.event.CreateViewportHandler;
import org.geosdi.geoplatform.gui.configuration.message.GeoPlatformMessage;
import org.geosdi.geoplatform.gui.impl.view.LayoutManager;
import org.geosdi.geoplatform.gui.model.GPLayerBean;
import org.gwtopenmaps.openlayers.client.Bounds;
import org.gwtopenmaps.openlayers.client.Map;
import org.gwtopenmaps.openlayers.client.Projection;

/**
 * @author Nazzareno Sileno - CNR IMAA geoSDI Group
 * @email nazzareno.sileno@geosdi.org
 */
public class ViewportWidget extends GeoPlatformWindow implements
        CreateViewportHandler {

    public static final short VIEWPORT_WIDGET_WIDTH = 690;
    public static final short VIEWPORT_WIDGET_HEIGHT = 430;
    //
    private ContentPanel centralPanel;
    private final ViewportGridFieldSet viewportGridFieldSet;
    private final Map map;
    private GPClientViewport viewportToAdd;
    private final LoadViewportsRequest loadViewports = new LoadViewportsRequest();

    public ViewportWidget(boolean lazy, Map map) {
        super(lazy);
        this.map = map;
        this.viewportGridFieldSet = new ViewportGridFieldSet(this.map);
        MapHandlerManager.addHandler(CreateViewportHandler.TYPE, this);
    }

    @Override
    public void addComponent() {
        this.centralPanel = new ContentPanel(new FlowLayout(0));
        this.centralPanel.setHeaderVisible(Boolean.FALSE);
        this.centralPanel.setFrame(Boolean.TRUE);
        this.centralPanel.setSize(VIEWPORT_WIDGET_WIDTH - 15,
                VIEWPORT_WIDGET_HEIGHT - 20);
        this.centralPanel.add(this.viewportGridFieldSet);
        this.centralPanel.setScrollMode(Style.Scroll.NONE);
        super.add(this.centralPanel);
    }

    @Override
    public void initSize() {
        setSize(VIEWPORT_WIDGET_WIDTH, VIEWPORT_WIDGET_HEIGHT);
    }

    @Override
    public void setWindowProperties() {
        super.setHeadingHtml(
                MapModuleConstants.INSTANCE.ViewportWidget_headingText());
        super.setScrollMode(Style.Scroll.NONE);
        super.setResizable(Boolean.FALSE);
    }

    @Override
    public void finalizeInitOperations() {
        super.finalizeInitOperations();

    }

    @Override
    public void show() {
        ViewportWidget.super.show();
        this.centralPanel.mask(
                MapModuleConstants.INSTANCE.ViewportWidget_loadingMaskText());

        GPClientCommandExecutor.executeCommand(
                new GPClientCommand<LoadViewportsResponse>() {

                    private static final long serialVersionUID = -647700714070936543L;

                    {
                        super.setCommandRequest(loadViewports);
                    }

                    @Override
                    public void onCommandSuccess(LoadViewportsResponse response) {
                        viewportGridFieldSet.setViewportListStore(
                                response.getResult());
                        ViewportWidget.this.centralPanel.unmask();
                        if (viewportToAdd != null) {
                            viewportGridFieldSet.addViewportElement(
                                    viewportToAdd);
                            viewportToAdd = null;
                        }
                    }

                    @Override
                    public void onCommandFailure(Throwable caught) {
                        GeoPlatformMessage.errorMessage(
                                WindowsConstants.INSTANCE.errorLoadingTitleText(),
                                WindowsConstants.INSTANCE.errorMakingConnectionBodyText());
                        LayoutManager.getInstance().getStatusMap().setStatus(
                                MapModuleConstants.INSTANCE.ViewportWidget_statusErrorLoadingText(),
                                SearchStatus.EnumSearchStatus.STATUS_NO_SEARCH.toString());
                        System.out.println(
                                "Error saving loading the viewport elements: " + caught.toString()
                                + " data: " + caught.getMessage());
                    }
                });
    }

    @Override
    public void onCreateViewport(List<GPLayerBean> layerList,
            String viewportName) {
        Bounds bounds = ViewportUtility.calculateMaxBound(layerList, map);

        Projection currentProjection = new Projection(
                GPCoordinateReferenceSystem.WGS_84.getCode());
        Projection destinationProjection = new Projection(map.getProjection());
        bounds.transform(currentProjection, destinationProjection);

        double zoom = map.getZoomForExtent(bounds, Boolean.FALSE);

        bounds.transform(destinationProjection, currentProjection);

        BBoxClientInfo bbox = ViewportUtility.generateBBOXFromBounds(bounds);
        this.viewportToAdd = new GPClientViewport(viewportName,
                MapModuleConstants.INSTANCE.ViewportUtility_newViewportDescriptionText(),
                bbox, zoom, Boolean.FALSE);
        this.show();
    }
}