org.argeo.app.ui/src/org/argeo/app/ui/openlayers/OverviewMap.java

   1 package org.argeo.app.ui.openlayers;
   2
   3 import java.util.List;
   4
   5 import javax.jcr.Node;
   6 import javax.jcr.RepositoryException;
   7 import javax.jcr.observation.Event;
   8 import javax.jcr.observation.EventIterator;
   9 import javax.jcr.observation.EventListener;
  10 import javax.jcr.query.Query;
  11
  12 import org.argeo.app.api.EntityType;
  13 import org.argeo.cms.swt.CmsSwtUtils;
  14 import org.argeo.cms.ui.CmsUiProvider;
  15 import org.argeo.jcr.JcrException;
  16 import org.argeo.jcr.JcrUtils;
  17 import org.eclipse.swt.SWT;
  18 import org.eclipse.swt.layout.GridLayout;
  19 import org.eclipse.swt.widgets.Composite;
  20 import org.eclipse.swt.widgets.Control;
  21
  22 /** Displays an overview map. */
  23 public class OverviewMap implements CmsUiProvider {
  24
  25         @Override
  26         public Control createUi(Composite parent, Node context) throws RepositoryException {
  27                 parent.setLayout(new GridLayout());
  28                 refreshUi(parent, context);
  29
  30                 try {
  31                         String[] nodeTypes = { EntityType.geopoint.get() };
  32                         context.getSession().getWorkspace().getObservationManager().addEventListener(new EventListener() {
  33
  34                                 @Override
  35                                 public void onEvent(EventIterator events) {
  36                                         if (!parent.isDisposed())
  37                                                 parent.getDisplay().asyncExec(() -> {
  38                                                         try {
  39                                                                 refreshUi(parent, context);
  40                                                         } catch (RepositoryException e) {
  41                                                                 throw new JcrException(e);
  42                                                         }
  43                                                 });
  44                                 }
  45                         }, Event.PROPERTY_CHANGED | Event.NODE_ADDED | Event.NODE_REMOVED | Event.PROPERTY_ADDED, "/", true, null,
  46                                         nodeTypes, false);
  47                 } catch (RepositoryException e) {
  48                         throw new IllegalStateException("Cannot add JCR observer", e);
  49                 }
  50
  51                 return parent;
  52         }
  53
  54         protected void refreshUi(Composite parent, Node context) throws RepositoryException {
  55                 CmsSwtUtils.clear(parent);
  56                 Query query = context.getSession().getWorkspace().getQueryManager()
  57                                 .createQuery("SELECT * FROM [" + EntityType.geopoint.get() + "]", Query.JCR_SQL2);
  58                 List<Node> geoPoints = JcrUtils.nodeIteratorToList(query.execute().getNodes());
  59                 OpenLayersMap map = new OpenLayersMap(parent, SWT.NONE, getClass().getResource("map-osm.html"));
  60                 map.setLayoutData(CmsSwtUtils.fillAll());
  61
  62                 // apafMap.setZoom(7);
  63                 // apafMap.setCenter(-2.472, 8.010);
  64                 map.addPoints(geoPoints);
  65         }
  66 }