bundles/org.simantics.selectionview/src/org/simantics/selectionview/VariableColoringDecorationRule.java

   1 package org.simantics.selectionview;
   2
   3 import org.eclipse.jface.resource.ColorDescriptor;
   4 import org.eclipse.swt.graphics.RGB;
   5 import org.simantics.browsing.ui.common.ColumnKeys;
   6 import org.simantics.browsing.ui.content.LabelDecorator;
   7 import org.simantics.browsing.ui.model.labeldecorators.LabelDecorationRule;
   8 import org.simantics.db.ReadGraph;
   9 import org.simantics.db.exception.DatabaseException;
  10 import org.simantics.db.layer0.variable.Variable;
  11 import org.simantics.db.layer0.variable.Variables;
  12
  13 /**
  14  * @author Tuukka Lehtonen
  15  */
  16 public class VariableColoringDecorationRule implements LabelDecorationRule {
  17
  18         private final static ColorDescriptor READONLY_GRAY = ColorDescriptor.createFrom(new RGB(240, 240, 240));
  19
  20         @Override
  21         public boolean isCompatible(Class<?> contentType) {
  22                 return contentType.equals(Variable.class);
  23         }
  24
  25         @Override
  26         public LabelDecorator getLabelDecorator(ReadGraph graph, Object content)
  27                         throws DatabaseException {
  28                 Variable variable = (Variable)content;
  29                 Object o = variable.getPossiblePropertyValue(graph, Variables.READONLY);
  30                 if (!Boolean.TRUE.equals(o))
  31                         return null;
  32                 return ReadOnlyDecorator.INSTANCE;
  33         }
  34
  35         private static class ReadOnlyDecorator extends LabelDecorator.Stub {
  36                 public static ReadOnlyDecorator INSTANCE = new ReadOnlyDecorator();
  37                 @SuppressWarnings("unchecked")
  38                 @Override
  39                 public <C> C decorateBackground(C color, String column, int itemIndex) {
  40                         if (ColumnKeys.DISPLAY_VALUE.equals(column) || ColumnKeys.DISPLAY_UNIT.equals(column))
  41                                 return (C) READONLY_GRAY;
  42                         return null;
  43                 }
  44         }
  45
  46 }