eu.esdihumboldt.hale.ui.views.styledmap.StyledMapUtil.java Source code

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Here is the source code for eu.esdihumboldt.hale.ui.views.styledmap.StyledMapUtil.java

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/*
 * Copyright (c) 2012 Data Harmonisation Panel
 * 
 * All rights reserved. This program and the accompanying materials are made
 * available under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution. If not, see <http://www.gnu.org/licenses/>.
 * 
 * Contributors:
 *     HUMBOLDT EU Integrated Project #030962
 *     Data Harmonisation Panel <http://www.dhpanel.eu>
 */

package eu.esdihumboldt.hale.ui.views.styledmap;

import java.util.HashSet;
import java.util.Set;

import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ui.PlatformUI;
import org.jdesktop.swingx.mapviewer.GeoPosition;

import de.cs3d.common.metamodel.helperGeometry.BoundingBox;
import de.fhg.igd.mapviewer.BasicMapKit;
import de.fhg.igd.mapviewer.waypoints.SelectableWaypoint;
import eu.esdihumboldt.hale.common.instance.model.Instance;
import eu.esdihumboldt.hale.common.instance.model.InstanceReference;
import eu.esdihumboldt.hale.ui.service.instance.InstanceService;
import eu.esdihumboldt.hale.ui.views.styledmap.painter.AbstractInstancePainter;
import eu.esdihumboldt.hale.ui.views.styledmap.painter.InstanceWaypoint;

/**
 * Utility methods regarding the map view.
 * 
 * @author Simon Templer
 */
public abstract class StyledMapUtil {

    /**
     * Zoom to all instances available in the map. Does nothing if there are no
     * instances displayed.
     * 
     * @param mapKit the map kit
     */
    public static void zoomToAll(BasicMapKit mapKit) {
        BoundingBox bb = null;

        // determine bounding box
        for (AbstractInstancePainter painter : mapKit.getTilePainters(AbstractInstancePainter.class)) {
            BoundingBox painterBB = painter.getBoundingBox();
            if (painterBB.checkIntegrity() && !painterBB.isEmpty()) {
                if (bb == null) {
                    bb = new BoundingBox(painterBB);
                } else {
                    bb.add(painterBB);
                }
            }
        }

        if (bb != null) {
            Set<GeoPosition> positions = new HashSet<GeoPosition>();
            positions.add(new GeoPosition(bb.getMinX(), bb.getMinY(), SelectableWaypoint.COMMON_EPSG));
            positions.add(new GeoPosition(bb.getMaxX(), bb.getMaxY(), SelectableWaypoint.COMMON_EPSG));
            mapKit.zoomToPositions(positions);
        }
    }

    /**
     * Zoom to the selected instances. Does nothing if the selection is empty or
     * contains no {@link Instance}s or {@link InstanceReference}s.
     * 
     * @param mapKit the map kit
     * @param selection the selection
     */
    public static void zoomToSelection(BasicMapKit mapKit, IStructuredSelection selection) {
        BoundingBox bb = null;

        // determine bounding box for each reference and accumulate it
        for (AbstractInstancePainter painter : mapKit.getTilePainters(AbstractInstancePainter.class)) {
            for (Object element : selection.toList()) {
                InstanceReference ref = getReference(element);
                if (ref != null) {
                    InstanceWaypoint wp = painter.findWaypoint(ref);
                    if (wp != null) {
                        BoundingBox wpBB = wp.getBoundingBox();
                        if (wpBB.checkIntegrity() && !wpBB.isEmpty()) {
                            if (bb == null) {
                                bb = new BoundingBox(wpBB);
                            } else {
                                bb.add(wpBB);
                            }
                        }
                    }
                }
            }
        }

        if (bb != null) {
            Set<GeoPosition> positions = new HashSet<GeoPosition>();
            positions.add(new GeoPosition(bb.getMinX(), bb.getMinY(), SelectableWaypoint.COMMON_EPSG));
            positions.add(new GeoPosition(bb.getMaxX(), bb.getMaxY(), SelectableWaypoint.COMMON_EPSG));
            mapKit.zoomToPositions(positions);
        }
    }

    private static InstanceReference getReference(Object element) {
        if (element instanceof InstanceReference) {
            return (InstanceReference) element;
        }
        if (element instanceof Instance) {
            InstanceService is = (InstanceService) PlatformUI.getWorkbench().getService(InstanceService.class);
            is.getReference((Instance) element);
        }
        return null;
    }

}