org.simantics.district.network.ui/src/org/simantics/district/network/ui/contributions/ChangeMappingTypeHandler.java

   1 package org.simantics.district.network.ui.contributions;
   2
   3 import java.util.HashMap;
   4 import java.util.List;
   5 import java.util.Map;
   6
   7 import javax.inject.Named;
   8
   9 import org.eclipse.core.runtime.IProgressMonitor;
  10 import org.eclipse.core.runtime.IStatus;
  11 import org.eclipse.core.runtime.Status;
  12 import org.eclipse.core.runtime.jobs.Job;
  13 import org.eclipse.e4.core.di.annotations.CanExecute;
  14 import org.eclipse.e4.core.di.annotations.Execute;
  15 import org.eclipse.e4.ui.services.IServiceConstants;
  16 import org.eclipse.jface.dialogs.Dialog;
  17 import org.eclipse.jface.layout.GridDataFactory;
  18 import org.eclipse.jface.viewers.ISelection;
  19 import org.eclipse.swt.SWT;
  20 import org.eclipse.swt.layout.GridData;
  21 import org.eclipse.swt.layout.GridLayout;
  22 import org.eclipse.swt.widgets.Combo;
  23 import org.eclipse.swt.widgets.Composite;
  24 import org.eclipse.swt.widgets.Control;
  25 import org.eclipse.swt.widgets.Group;
  26 import org.eclipse.swt.widgets.Label;
  27 import org.eclipse.swt.widgets.Shell;
  28 import org.eclipse.ui.PlatformUI;
  29 import org.eclipse.ui.dialogs.SelectionStatusDialog;
  30 import org.simantics.DatabaseJob;
  31 import org.simantics.Simantics;
  32 import org.simantics.db.ReadGraph;
  33 import org.simantics.db.Resource;
  34 import org.simantics.db.WriteGraph;
  35 import org.simantics.db.common.request.ReadRequest;
  36 import org.simantics.db.common.request.WriteRequest;
  37 import org.simantics.db.exception.DatabaseException;
  38 import org.simantics.db.layer0.SelectionHints;
  39 import org.simantics.db.request.Read;
  40 import org.simantics.district.network.ontology.DistrictNetworkResource;
  41 import org.simantics.district.network.ui.function.Functions;
  42 import org.simantics.district.network.ui.internal.Activator;
  43 import org.simantics.layer0.Layer0;
  44 import org.simantics.utils.ui.ISelectionUtils;
  45
  46 public class ChangeMappingTypeHandler {
  47
  48
  49     @CanExecute
  50     public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection selection) {
  51         List<Resource> elements = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  52         if (elements.size() < 1)
  53             return false;
  54         try {
  55             return Simantics.getSession().syncRequest(new Read<Boolean>() {
  56
  57                 @Override
  58                 public Boolean perform(ReadGraph graph) throws DatabaseException {
  59                     Layer0 L0 = Layer0.getInstance(graph);
  60                     Resource instanceOf = null;
  61                     for (Resource element : elements) {
  62                         if (instanceOf == null) {
  63                             instanceOf = graph.getSingleObject(element, L0.InstanceOf);
  64                         } else {
  65                             Resource currentInstanceOf = graph.getSingleObject(element, L0.InstanceOf);
  66                             if (!currentInstanceOf.equals(instanceOf)) {
  67                                 return false;
  68                             }
  69                         }
  70                     }
  71                     return true;
  72                 }
  73             });
  74         } catch (DatabaseException e) {
  75             e.printStackTrace();
  76             return false;
  77         }
  78     }
  79
  80     @Execute
  81     public void execute(@Named(IServiceConstants.ACTIVE_SELECTION) Object selection) {
  82         final List<Resource> elements = ISelectionUtils.getPossibleKeys(selection, SelectionHints.KEY_MAIN, Resource.class);
  83         if (elements.size() < 1)
  84             return;
  85
  86         SelectMappingDialog dialog = new SelectMappingDialog(PlatformUI.getWorkbench().getActiveWorkbenchWindow().getShell(), elements);
  87         if (dialog.open() != Dialog.OK)
  88             return;
  89
  90         Resource mapping = dialog.getDefaultVertexMapping();
  91         Job job = new DatabaseJob("Join selected vertices") {
  92
  93             @Override
  94             protected IStatus run(IProgressMonitor monitor) {
  95                 try {
  96                     Simantics.getSession().syncRequest(new WriteRequest() {
  97
  98                         @Override
  99                         public void perform(WriteGraph graph) throws DatabaseException {
 100                             DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
 101                             for (Resource element : elements) {
 102                                 graph.deny(element, DN.HasMapping);
 103                                 graph.claim(element, DN.HasMapping, mapping);
 104                             }
 105                         }
 106                     });
 107                 } catch (DatabaseException e) {
 108                     return new Status(IStatus.ERROR, Activator.PLUGIN_ID, getName() + " failed.", e);
 109                 }
 110                 return Status.OK_STATUS;
 111             }
 112         };
 113         job.setUser(true);
 114         job.schedule();
 115     }
 116
 117     private static class SelectMappingDialog extends SelectionStatusDialog {
 118
 119         private Combo vertexMappingCombo;
 120
 121         private Composite composite;
 122
 123         private List<Resource> elements;
 124         private Map<String, Resource> vertexMappings = new HashMap<>();
 125
 126         private Resource defaultVertexMapping;
 127
 128         protected SelectMappingDialog(Shell parentShell, List<Resource> elements) {
 129             super(parentShell);
 130             this.elements = elements;
 131             setTitle("Select mappings for new DN diagram");
 132         }
 133
 134         public Resource getDefaultVertexMapping() {
 135             return defaultVertexMapping;
 136         }
 137
 138         @Override
 139         protected Control createDialogArea(Composite parent) {
 140             composite = (Composite) super.createDialogArea(parent);
 141
 142             createMappingsGroup(composite);
 143
 144             // compute default values
 145             Simantics.getSession().asyncRequest(new ReadRequest() {
 146
 147                 @Override
 148                 public void run(ReadGraph graph) throws DatabaseException {
 149                     DistrictNetworkResource DN = DistrictNetworkResource.getInstance(graph);
 150                     Resource element = elements.get(0);
 151                     if (graph.isInstanceOf(element, DN.Vertex)) {
 152                         vertexMappings = Functions.getVertexMappings(graph, element);
 153                     } else if (graph.isInstanceOf(element, DN.Edge)) {
 154                         vertexMappings = Functions.getEdgeMappings(graph, element);
 155                     }
 156                     composite.getDisplay().asyncExec(() -> {
 157                         vertexMappingCombo.setItems(vertexMappings.keySet().toArray(new String[vertexMappings.size()]));
 158                         vertexMappingCombo.select(0);
 159                     });
 160
 161                 }
 162             });
 163             return composite;
 164         }
 165
 166         @Override
 167         protected void computeResult() {
 168             defaultVertexMapping = vertexMappings.get(vertexMappingCombo.getItem(vertexMappingCombo.getSelectionIndex()));
 169         }
 170
 171         private void createMappingsGroup(Composite parent) {
 172             Group group= new Group(parent, SWT.NONE);
 173             group.setFont(parent.getFont());
 174             group.setText("Default mappings");
 175             GridDataFactory.fillDefaults().grab(true, false).applyTo(group);
 176             group.setLayout(new GridLayout(1, false));
 177
 178             Composite cmposite = new Composite(group, SWT.NONE);
 179             cmposite.setLayoutData(new GridData(SWT.FILL, SWT.TOP, true, false));
 180             cmposite.setLayout(new GridLayout(2, false));
 181
 182             Label vertexMappingLabel = new Label(cmposite, SWT.NONE);
 183             vertexMappingLabel.setText("Default vertex mapping");
 184
 185             vertexMappingCombo = new Combo(cmposite, SWT.READ_ONLY | SWT.BORDER);
 186             GridDataFactory.fillDefaults().grab(true, false).applyTo(vertexMappingCombo);
 187
 188         }
 189     }
 190 }