bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/PropertyLabelDecoratorFactory.java

   1 /*******************************************************************************
   2  *  Copyright (c) 2013 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  *      Semantum Oy - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.browsing.ui.swt;
  13
  14 import org.eclipse.jface.resource.ColorDescriptor;
  15 import org.eclipse.swt.graphics.RGB;
  16 import org.simantics.browsing.ui.BuiltinKeys;
  17 import org.simantics.browsing.ui.BuiltinKeys.LabelDecoratorKey;
  18 import org.simantics.browsing.ui.NodeContext;
  19 import org.simantics.browsing.ui.PrimitiveQueryUpdater;
  20 import org.simantics.browsing.ui.common.ColumnKeys;
  21 import org.simantics.browsing.ui.common.property.IArrayProperty;
  22 import org.simantics.browsing.ui.common.property.IProperty;
  23 import org.simantics.browsing.ui.content.LabelDecorator;
  24 import org.simantics.browsing.ui.content.LabelDecoratorFactory;
  25 import org.simantics.browsing.ui.graph.impl.contribution.LabelDecoratorContributionImpl;
  26 import org.simantics.databoard.Bindings;
  27 import org.simantics.db.ReadGraph;
  28 import org.simantics.db.Resource;
  29 import org.simantics.db.exception.DatabaseException;
  30 import org.simantics.layer0.Layer0;
  31
  32 /**
  33  * @author Tuukka Lehtonen
  34  */
  35 public class PropertyLabelDecoratorFactory implements LabelDecoratorFactory {
  36
  37         private final static ColorDescriptor READONLY_GRAY = ColorDescriptor.createFrom(new RGB(240, 240, 240));
  38
  39         @Override
  40         public LabelDecorator create(PrimitiveQueryUpdater manager, NodeContext context, LabelDecoratorKey key) {
  41                 Object o = context.getConstant(BuiltinKeys.INPUT);
  42                 if (o instanceof IProperty) {
  43                         IProperty prop = (IProperty) o;
  44                         if (o instanceof IArrayProperty) {
  45                                 IArrayProperty array = (IArrayProperty) o;
  46                                 if (array.isSlice())
  47                                         // Prevent the decorator from overworking on each and every sliced table row.
  48                                         return null;
  49                         }
  50
  51                         final Resource[] data = prop.getData(Resource[].class);
  52                         if (data == null)
  53                                 return null;
  54                         if (data.length != 3)
  55                                 return null;
  56
  57                         return new PropertyReadOnlyLabelDecorator(manager, context, key);
  58                 }
  59                 return null;
  60         }
  61
  62         static class PropertyReadOnlyLabelDecorator extends LabelDecoratorContributionImpl {
  63
  64                 public PropertyReadOnlyLabelDecorator(PrimitiveQueryUpdater manager, NodeContext context, LabelDecoratorKey key) {
  65                         super(manager, context, key);
  66                 }
  67
  68                 @Override
  69                 public LabelDecorator getDecorator(ReadGraph graph, NodeContext context) throws DatabaseException {
  70                         IProperty prop = (IProperty) context.getConstant(BuiltinKeys.INPUT);
  71                         final Resource[] data = prop.getData(Resource[].class);
  72                         Layer0 L0 = Layer0.getInstance(graph);
  73                         Object o = graph.getPossibleRelatedValue2(data[1], L0.readOnly, Bindings.BOOLEAN);
  74                         if (!Boolean.TRUE.equals(o))
  75                                 return null;
  76
  77                         return new LabelDecorator.Stub() {
  78                                 @Override
  79                                 public <C> C decorateForeground(C color, String column, int itemIndex) {
  80                                         return null;
  81                                 }
  82                                 @SuppressWarnings("unchecked")
  83                                 @Override
  84                                 public <C> C decorateBackground(C color, String column, int itemIndex) {
  85                                         if (ColumnKeys.VALUE.equals(column))
  86                                                 return (C) READONLY_GRAY;
  87                                         return null;
  88                                 }
  89                         };
  90                 }
  91
  92         }
  93
  94 }