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.Session;
   8 import javax.jcr.observation.Event;
   9 import javax.jcr.observation.EventIterator;
  10 import javax.jcr.observation.EventListener;
  11 import javax.jcr.query.Query;
  12
  13 import org.argeo.api.acr.Content;
  14 import org.argeo.api.cms.CmsConstants;
  15 import org.argeo.app.api.EntityType;
  16 import org.argeo.cms.jcr.acr.JcrContentProvider;
  17 import org.argeo.cms.swt.CmsSwtUtils;
  18 import org.argeo.cms.ui.CmsUiProvider;
  19 import org.argeo.jcr.JcrException;
  20 import org.argeo.jcr.JcrUtils;
  21 import org.eclipse.swt.SWT;
  22 import org.eclipse.swt.layout.GridLayout;
  23 import org.eclipse.swt.widgets.Composite;
  24 import org.eclipse.swt.widgets.Control;
  25
  26 /** Displays an overview map. */
  27 public class OverviewMap implements CmsUiProvider {
  28         private JcrContentProvider jcrContentProvider;
  29
  30         @Override
  31         public Control createUiPart(Composite parent, Content context) {
  32                 parent.setLayout(new GridLayout());
  33                 Session session = jcrContentProvider.getJcrSession(context, CmsConstants.SYS_WORKSPACE);
  34
  35                 try {
  36                         refreshUi(parent, session);
  37                         String[] nodeTypes = { EntityType.geopoint.get() };
  38                         session.getWorkspace().getObservationManager().addEventListener(new EventListener() {
  39
  40                                 @Override
  41                                 public void onEvent(EventIterator events) {
  42                                         if (!parent.isDisposed())
  43                                                 parent.getDisplay().asyncExec(() -> {
  44                                                         try {
  45                                                                 refreshUi(parent, session);
  46                                                         } catch (RepositoryException e) {
  47                                                                 throw new JcrException(e);
  48                                                         }
  49                                                 });
  50                                 }
  51                         }, Event.PROPERTY_CHANGED | Event.NODE_ADDED | Event.NODE_REMOVED | Event.PROPERTY_ADDED, "/", true, null,
  52                                         nodeTypes, false);
  53                 } catch (RepositoryException e) {
  54                         throw new JcrException("Cannot add JCR observer", e);
  55                 }
  56
  57                 return parent;
  58         }
  59
  60         protected void refreshUi(Composite parent, Session session) throws RepositoryException {
  61                 CmsSwtUtils.clear(parent);
  62                 Query query = session.getWorkspace().getQueryManager()
  63                                 .createQuery("SELECT * FROM [" + EntityType.geopoint.get() + "]", Query.JCR_SQL2);
  64                 List<Node> geoPoints = JcrUtils.nodeIteratorToList(query.execute().getNodes());
  65                 OpenLayersMap map = new OpenLayersMap(parent, SWT.NONE, getClass().getResource("map-osm.html"));
  66                 map.setLayoutData(CmsSwtUtils.fillAll());
  67
  68                 // apafMap.setZoom(7);
  69                 // apafMap.setCenter(-2.472, 8.010);
  70                 map.addPoints(geoPoints);
  71         }
  72
  73         public void setJcrContentProvider(JcrContentProvider jcrContentProvider) {
  74                 this.jcrContentProvider = jcrContentProvider;
  75         }
  76
  77 }