modelBrowser2/label/SubscriptionItemLabelDecorationRule.java

   1 /*******************************************************************************
   2  * Copyright (c) 2012 Association for Decentralized Information Management in
   3  * 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.modelBrowser2.label;
  13
  14 import org.eclipse.jface.resource.ColorDescriptor;
  15 import org.eclipse.jface.resource.FontDescriptor;
  16 import org.eclipse.swt.SWT;
  17 import org.eclipse.swt.graphics.RGB;
  18 import org.simantics.browsing.ui.content.LabelDecorator;
  19 import org.simantics.browsing.ui.model.labeldecorators.LabelDecorationRule;
  20 import org.simantics.databoard.Bindings;
  21 import org.simantics.databoard.Databoard;
  22 import org.simantics.databoard.binding.Binding;
  23 import org.simantics.databoard.type.BooleanType;
  24 import org.simantics.databoard.type.Datatype;
  25 import org.simantics.db.ReadGraph;
  26 import org.simantics.db.Resource;
  27 import org.simantics.db.exception.DatabaseException;
  28 import org.simantics.db.layer0.request.PossibleModel;
  29 import org.simantics.db.layer0.request.PossibleVariableValue;
  30 import org.simantics.db.layer0.variable.RVI;
  31 import org.simantics.db.layer0.variable.Variable;
  32 import org.simantics.modeling.ModelingResources;
  33 import org.simantics.modeling.subscription.ModelContexts;
  34 import org.simantics.modeling.subscription.ModelContextsRequest;
  35
  36 /**
  37  * @author Tuukka Lehtonen
  38  */
  39 public class SubscriptionItemLabelDecorationRule implements LabelDecorationRule {
  40
  41     public static final SubscriptionItemLabelDecorationRule INSTANCE = new SubscriptionItemLabelDecorationRule();
  42
  43     private static final ColorDescriptor RED = ColorDescriptor.createFrom(new RGB(255, 0, 0));
  44     private static final ColorDescriptor INVALID = ColorDescriptor.createFrom(new RGB(255, 128, 128));
  45     private static final ColorDescriptor GREEN  = ColorDescriptor.createFrom(new RGB(0, 160, 0));
  46
  47     static LabelDecorator RED_DECO = new LabelDecorator.Stub() {
  48         @SuppressWarnings("unchecked")
  49         public <C> C decorateForeground(C color, String column, int itemIndex) {
  50             return (C) RED;
  51         }
  52     };
  53
  54     static LabelDecorator GREEN_DECO = new LabelDecorator.Stub() {
  55         @SuppressWarnings("unchecked")
  56         public <C> C decorateForeground(C color, String column, int itemIndex) {
  57             return (C) GREEN;
  58         }
  59     };
  60
  61     static LabelDecorator UNRESOLVABLE = new LabelDecorator.Stub() {
  62         @Override
  63         public String decorateLabel(String label, String column, int itemIndex) {
  64             return label + " (INVALID)";
  65         }
  66         @SuppressWarnings("unchecked")
  67         public <C> C decorateForeground(C color, String column, int itemIndex) {
  68             return (C) INVALID;
  69         }
  70         @SuppressWarnings("unchecked")
  71         public <F> F decorateFont(F font, String column, int itemIndex) {
  72             return (F) ((FontDescriptor) font).withStyle(SWT.ITALIC);
  73         }
  74     };
  75
  76     @Override
  77     public boolean isCompatible(Class<?> contentType) {
  78         return contentType.equals(Resource.class);
  79     }
  80
  81     @Override
  82     public LabelDecorator getLabelDecorator(ReadGraph graph, Object content) throws DatabaseException {
  83         Resource item = (Resource) content;
  84         ModelingResources MOD = ModelingResources.getInstance(graph);
  85
  86         Binding rviBinding = graph.getService(Databoard.class).getBindingUnchecked( RVI.class );
  87         RVI rvi = graph.getPossibleRelatedValue(item, MOD.Subscription_Item_VariableId, rviBinding);
  88         if (rvi == null)
  89             return null;
  90
  91         Resource model = graph.sync( new PossibleModel(item) );
  92         if (model == null)
  93             return null;
  94
  95         ModelContexts contexts = graph.syncRequest(new ModelContextsRequest(model));
  96         if (contexts.getExperimentContext() == null)
  97             return null;
  98
  99         Variable variable = rvi.resolvePossible(graph, contexts.getExperimentContext());
 100         if (variable == null)
 101             return UNRESOLVABLE;
 102
 103         Datatype datatype = graph.getPossibleRelatedValue(item, MOD.Subscription_Item_Datatype, Bindings.getBindingUnchecked(Datatype.class));
 104         if (!(datatype instanceof BooleanType))
 105             return null;
 106
 107         Object value = graph.sync( new PossibleVariableValue<Object>(variable) );
 108         if (!(value instanceof Boolean))
 109             return null;
 110
 111         Boolean v = (Boolean) value;
 112         return v ? GREEN_DECO : RED_DECO;
 113     }
 114
 115 }