bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/actions/MergeFlagsHandler.java

   1 package org.simantics.modeling.ui.actions;
   2
   3 import java.util.Collections;
   4 import java.util.List;
   5
   6 import org.eclipse.core.runtime.IProgressMonitor;
   7 import org.eclipse.ui.PlatformUI;
   8 import org.simantics.db.Resource;
   9 import org.simantics.db.WriteGraph;
  10 import org.simantics.db.exception.DatabaseException;
  11 import org.simantics.diagram.synchronization.runtime.DiagramSelectionUpdater;
  12 import org.simantics.g2d.canvas.ICanvasContext;
  13 import org.simantics.modeling.flags.MergeFlags;
  14
  15 /**
  16  * @author Hannu Niemist&ouml;
  17  * @author Tuukka Lehtonen
  18  */
  19 public class MergeFlagsHandler extends FlagOperationHandler {
  20
  21     protected void perform(IProgressMonitor monitor, WriteGraph graph, List<Resource> flags, ICanvasContext canvasContext) throws DatabaseException {
  22         monitor.beginTask("Merge Selected Flags", IProgressMonitor.UNKNOWN);
  23         performMerge(graph, flags, canvasContext);
  24     }
  25
  26     public static void performMerge(WriteGraph graph, List<Resource> flags, ICanvasContext canvasContext) throws DatabaseException {
  27         final String text = MergeFlags.validateForMerge(graph, flags);
  28         if(text != null) {
  29             System.err.println(text);
  30             PlatformUI.getWorkbench().getDisplay().asyncExec(new Runnable() {
  31                 @Override
  32                 public void run() {
  33                     PlatformUI.getWorkbench().getActiveWorkbenchWindow().getActivePage()
  34                     .getActiveEditor().getEditorSite().getActionBars().getStatusLineManager()
  35                     .setErrorMessage(text);
  36                 }
  37             });
  38         }
  39         else {
  40             String result = MergeFlags.merge(graph, flags);
  41             if(result != null && !result.isEmpty()) {
  42                 System.err.println(result); // Should not happen because of prevalidation
  43             } else {
  44                 if (canvasContext != null) {
  45                     // Make sure the diagram selection is set to the
  46                     // merged flag after the merge.
  47                     new DiagramSelectionUpdater( canvasContext )
  48                     .setNewSelection(0, Collections.singleton( flags.get(0) ))
  49                     .setOneshot(true)
  50                     .track();
  51                 }
  52             }
  53         }
  54     }
  55
  56 }