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

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