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.Simantics;
  30 import org.simantics.db.ReadGraph;
  31 import org.simantics.db.Resource;
  32 import org.simantics.db.Session;
  33 import org.simantics.db.WriteGraph;
  34 import org.simantics.db.common.request.WriteRequest;
  35 import org.simantics.db.exception.DatabaseException;
  36 import org.simantics.db.request.Read;
  37 import org.simantics.diagram.stubs.DiagramResource;
  38 import org.simantics.modeling.ui.Activator;
  39 import org.simantics.ui.SimanticsUI;
  40 import org.simantics.utils.ui.AdaptionUtils;
  41 import org.simantics.utils.ui.ErrorLogger;
  42
  43 public class ToggleExternalFlag extends AbstractHandler implements IElementUpdater {
  44
  45     private static Resource getFlagResource(ISelection sel) {
  46         Resource r = AdaptionUtils.adaptToSingle(sel, Resource.class);
  47         return r;
  48     }
  49
  50     @Override
  51     public Object execute(ExecutionEvent event) throws ExecutionException {
  52         ISelection sel = HandlerUtil.getCurrentSelection(event);
  53         final Resource resource = getFlagResource(sel);
  54         if (resource == null)
  55             return null;
  56
  57         Simantics.getSession().asyncRequest(new WriteRequest() {
  58             @Override
  59             public void perform(WriteGraph g) throws DatabaseException {
  60                 DiagramResource dr = DiagramResource.getInstance(g);
  61                 Boolean ext = g.hasStatement(resource, dr.ExternalFlag);
  62                 if (ext)
  63                     g.deny(resource, dr.ExternalFlag);
  64                 else
  65                     g.claim(resource, dr.ExternalFlag, resource);
  66             }
  67         });
  68
  69         return null;
  70     }
  71
  72     @Override
  73     public void updateElement(UIElement element, @SuppressWarnings("rawtypes") Map parameters) {
  74         ICommandService commandService = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);
  75         Command command = commandService.getCommand("org.simantics.modeling.ui.toggleExternalFlag");
  76
  77         // Get a State object for the toggleSubscriptionGroup command
  78         State state = command.getState("org.simantics.modeling.ui.toggleExternalFlag.state");
  79         if (state == null) {
  80             state = new State();
  81             state.setValue(Boolean.TRUE);
  82             command.addState("org.simantics.modeling.ui.toggleExternalFlag.state", state);
  83         }
  84
  85         // Get the current value for the State object
  86         Session s = Simantics.peekSession();
  87         if (s != null) {
  88             Boolean value = Boolean.TRUE;
  89             IWorkbenchSite site = (IWorkbenchSite) parameters.get("org.eclipse.ui.part.IWorkbenchPartSite");
  90             ISelectionProvider sp = site.getSelectionProvider();
  91             if (sp != null) {
  92                 final Resource resource = getFlagResource(sp.getSelection());
  93                 if (resource != null) {
  94                     try {
  95                         value = s.syncRequest(new Read<Boolean>() {
  96                             @Override
  97                             public Boolean perform(ReadGraph graph) throws DatabaseException {
  98                                 DiagramResource dr = DiagramResource.getInstance(graph);
  99                                 return Boolean.valueOf(graph.hasStatement(resource, dr.ExternalFlag));
 100                             }
 101                         });
 102                     } catch (DatabaseException e) {
 103                         ErrorLogger.defaultLogError(e);
 104                     }
 105                 }
 106             }
 107             state.setValue(value);
 108         }
 109
 110         Boolean checked = (Boolean) state.getValue();
 111         element.setChecked(checked);
 112         element.setIcon(checked ? Activator.TICK_ICON : null);
 113     }
 114
 115 }
 116