bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/modelBrowser/handlers/ToggleExternalFlag.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.modeling.ui.modelBrowser.handlers;
  13
  14 import java.util.Map;
  15
  16 import org.eclipse.core.commands.AbstractHandler;
  17 import org.eclipse.core.commands.Command;
  18 import org.eclipse.core.commands.ExecutionEvent;
  19 import org.eclipse.core.commands.ExecutionException;
  20 import org.eclipse.core.commands.State;
  21 import org.eclipse.jface.viewers.ISelection;
  22 import org.eclipse.jface.viewers.ISelectionProvider;
  23 import org.eclipse.ui.IWorkbenchSite;
  24 import org.eclipse.ui.PlatformUI;
  25 import org.eclipse.ui.commands.ICommandService;
  26 import org.eclipse.ui.commands.IElementUpdater;
  27 import org.eclipse.ui.handlers.HandlerUtil;
  28 import org.eclipse.ui.menus.UIElement;
  29 import org.simantics.db.ReadGraph;
  30 import org.simantics.db.Resource;
  31 import org.simantics.db.Session;
  32 import org.simantics.db.WriteGraph;
  33 import org.simantics.db.common.request.WriteRequest;
  34 import org.simantics.db.exception.DatabaseException;
  35 import org.simantics.db.request.Read;
  36 import org.simantics.diagram.stubs.DiagramResource;
  37 import org.simantics.modeling.ui.Activator;
  38 import org.simantics.ui.SimanticsUI;
  39 import org.simantics.utils.ui.AdaptionUtils;
  40 import org.simantics.utils.ui.ErrorLogger;
  41
  42 public class ToggleExternalFlag extends AbstractHandler implements IElementUpdater {
  43
  44     private static Resource getFlagResource(ISelection sel) {
  45         Resource r = AdaptionUtils.adaptToSingle(sel, Resource.class);
  46         return r;
  47     }
  48
  49     @Override
  50     public Object execute(ExecutionEvent event) throws ExecutionException {
  51         ISelection sel = HandlerUtil.getCurrentSelection(event);
  52         final Resource resource = getFlagResource(sel);
  53         if (resource == null)
  54             return null;
  55
  56         SimanticsUI.getSession().asyncRequest(new WriteRequest() {
  57             @Override
  58             public void perform(WriteGraph g) throws DatabaseException {
  59                 DiagramResource dr = DiagramResource.getInstance(g);
  60                 Boolean ext = g.hasStatement(resource, dr.ExternalFlag);
  61                 if (ext)
  62                     g.deny(resource, dr.ExternalFlag);
  63                 else
  64                     g.claim(resource, dr.ExternalFlag, resource);
  65             }
  66         });
  67
  68         return null;
  69     }
  70
  71     @Override
  72     public void updateElement(UIElement element, @SuppressWarnings("rawtypes") Map parameters) {
  73         ICommandService commandService = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);
  74         Command command = commandService.getCommand("org.simantics.modeling.ui.toggleExternalFlag");
  75
  76         // Get a State object for the toggleSubscriptionGroup command
  77         State state = command.getState("org.simantics.modeling.ui.toggleExternalFlag.state");
  78         if (state == null) {
  79             state = new State();
  80             state.setValue(Boolean.TRUE);
  81             command.addState("org.simantics.modeling.ui.toggleExternalFlag.state", state);
  82         }
  83
  84         // Get the current value for the State object
  85         Session s = SimanticsUI.peekSession();
  86         if (s != null) {
  87             Boolean value = Boolean.TRUE;
  88             IWorkbenchSite site = (IWorkbenchSite) parameters.get("org.eclipse.ui.part.IWorkbenchPartSite");
  89             ISelectionProvider sp = site.getSelectionProvider();
  90             if (sp != null) {
  91                 final Resource resource = getFlagResource(sp.getSelection());
  92                 if (resource != null) {
  93                     try {
  94                         value = s.syncRequest(new Read<Boolean>() {
  95                             @Override
  96                             public Boolean perform(ReadGraph graph) throws DatabaseException {
  97                                 DiagramResource dr = DiagramResource.getInstance(graph);
  98                                 return Boolean.valueOf(graph.hasStatement(resource, dr.ExternalFlag));
  99                             }
 100                         });
 101                     } catch (DatabaseException e) {
 102                         ErrorLogger.defaultLogError(e);
 103                     }
 104                 }
 105             }
 106             state.setValue(value);
 107         }
 108
 109         Boolean checked = (Boolean) state.getValue();
 110         element.setChecked(checked);
 111         element.setIcon(checked ? Activator.TICK_ICON : null);
 112     }
 113
 114 }
 115