bundles/org.simantics.modeling.ui/src/org/simantics/modeling/ui/actions/e4/EditStyleHandler.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.actions.e4;\r
  13 \r
  14 import java.util.Arrays;\r
  15 import java.util.List;\r
  16 \r
  17 import javax.inject.Named;\r
  18 \r
  19 import org.eclipse.e4.core.contexts.Active;\r
  20 import org.eclipse.e4.core.di.annotations.CanExecute;\r
  21 import org.eclipse.e4.core.di.annotations.Execute;\r
  22 import org.eclipse.e4.ui.model.application.ui.basic.MPart;\r
  23 import org.eclipse.e4.ui.services.IServiceConstants;\r
  24 import org.eclipse.jface.viewers.ISelection;\r
  25 import org.eclipse.ui.internal.e4.compatibility.CompatibilityEditor;\r
  26 import org.simantics.Simantics;\r
  27 import org.simantics.db.ReadGraph;\r
  28 import org.simantics.db.Resource;\r
  29 import org.simantics.db.common.request.UnaryRead;\r
  30 import org.simantics.db.common.utils.RequestUtil;\r
  31 import org.simantics.db.exception.DatabaseException;\r
  32 import org.simantics.diagram.stubs.DiagramResource;\r
  33 import org.simantics.modeling.ui.actions.style.EditStyle;\r
  34 import org.simantics.modeling.ui.diagramEditor.DiagramEditor;\r
  35 import org.simantics.ui.SimanticsUI;\r
  36 import org.simantics.ui.utils.ResourceAdaptionUtils;\r
  37 \r
  38 /**\r
  39  * Style Edit\r
  40  * \r
  41  * TODO : should we have extension point for expanding styles?\r
  42  * TODO : default ColorChooser is not suitable for this task\r
  43  * TODO : how to store MetricsFormat template list\r
  44  * \r
  45  * @author Marko Luukkainen <marko.luukkainen@vtt.fi>\r
  46  *\r
  47  */\r
  48 public class EditStyleHandler {\r
  49 \r
  50     private Resource[] lastResources = Resource.NONE;\r
  51     private boolean cachedCanExecute;\r
  52 \r
  53     @CanExecute\r
  54     public boolean canExecute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection s, @Active MPart part) throws DatabaseException, InterruptedException {\r
  55         if (!(part.getObject() instanceof CompatibilityEditor))\r
  56             return false;\r
  57         CompatibilityEditor editor = (CompatibilityEditor) part.getObject();\r
  58         if (!(editor.getPart() instanceof DiagramEditor))\r
  59             return false;\r
  60         if (s == null)\r
  61             return false;\r
  62 \r
  63         final Resource[] resources = ResourceAdaptionUtils.toResources(s);\r
  64         if (resources.length != 0) {\r
  65             if (!Arrays.equals(resources, lastResources)) {\r
  66                 lastResources = resources;\r
  67                 cachedCanExecute = areStyleProviders(resources);\r
  68             }\r
  69             return cachedCanExecute;\r
  70         }\r
  71         return false;\r
  72     }\r
  73 \r
  74     private static boolean areStyleProviders(Resource[] resources) throws DatabaseException, InterruptedException {\r
  75         return RequestUtil.trySyncRequest(\r
  76                 Simantics.getSession(),\r
  77                 SimanticsUI.UI_THREAD_REQUEST_START_TIMEOUT,\r
  78                 SimanticsUI.UI_THREAD_REQUEST_EXECUTION_TIMEOUT,\r
  79                 false,\r
  80                 new StyleProviderCheck(Arrays.asList(resources)));\r
  81     }\r
  82 \r
  83     private static class StyleProviderCheck extends UnaryRead<List<Resource>, Boolean> {\r
  84 \r
  85         public StyleProviderCheck(List<Resource> parameter) {\r
  86             super(parameter);\r
  87         }\r
  88 \r
  89         @Override\r
  90         public Boolean perform(ReadGraph graph) throws DatabaseException {\r
  91             DiagramResource DIA = DiagramResource.getInstance(graph);\r
  92             // Find what kind of styles selected objects support\r
  93             for (Resource r : parameter)\r
  94                 if (!graph.isInstanceOf(r, DIA.StyleProvider))\r
  95                     return false;\r
  96             return true;\r
  97         }\r
  98 \r
  99     }\r
 100 \r
 101     @Execute\r
 102     public void execute(@Named(IServiceConstants.ACTIVE_SELECTION) ISelection s) {\r
 103         final Resource[] resources = ResourceAdaptionUtils.toResources(s);\r
 104         if (resources.length != 0)\r
 105             EditStyle.openStyleDialog(resources);\r
 106     }\r
 107 \r
 108 }\r