bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/ComboModifyListenerImpl.java

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2012 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.browsing.ui.swt.widgets.impl;\r
  13 \r
  14 import org.eclipse.jface.viewers.ISelection;\r
  15 import org.eclipse.swt.widgets.Combo;\r
  16 import org.simantics.db.WriteGraph;\r
  17 import org.simantics.db.common.request.WriteRequest;\r
  18 import org.simantics.db.exception.DatabaseException;\r
  19 import org.simantics.db.layer0.util.Layer0Utils;\r
  20 import org.simantics.db.management.ISessionContext;\r
  21 import org.simantics.utils.ReflectionUtils;\r
  22 import org.simantics.utils.ui.ISelectionUtils;\r
  23 \r
  24 abstract public class ComboModifyListenerImpl<T> implements TextModifyListener, Widget {\r
  25 \r
  26     private ISessionContext context;\r
  27     private Object lastInput = null;\r
  28     \r
  29     final private Class<?> clazz;\r
  30     \r
  31     public ComboModifyListenerImpl() {\r
  32         clazz = ReflectionUtils.getSingleParameterType(getClass());\r
  33     }\r
  34     \r
  35     @Override\r
  36     public void modifyText(TrackedModifyEvent e) {\r
  37         \r
  38         Combo combo = (Combo)e.getWidget();\r
  39         final String textValue = combo.getText();\r
  40         final Object input = lastInput;\r
  41         \r
  42         try {\r
  43             context.getSession().syncRequest(new WriteRequest() {\r
  44 \r
  45                 @SuppressWarnings("unchecked")\r
  46                 @Override\r
  47                 public void perform(WriteGraph graph) throws DatabaseException {\r
  48                     graph.markUndoPoint();\r
  49                     T single = (T) ISelectionUtils.filterSingleSelection((ISelection)input, clazz);\r
  50                     applyText(graph, single, textValue);\r
  51                     Layer0Utils.addCommentMetadata(graph, "Modified " + single.toString() + " to " + textValue);\r
  52                 }\r
  53                 \r
  54             });\r
  55         } catch (DatabaseException e1) {\r
  56             e1.printStackTrace();\r
  57         }\r
  58     }\r
  59 \r
  60     @Override\r
  61     public void setInput(ISessionContext context, Object parameter) {\r
  62         this.context = context;\r
  63         lastInput = parameter;\r
  64     }\r
  65     \r
  66     abstract public void applyText(WriteGraph graph, T input, String text) throws DatabaseException;\r
  67     \r
  68 }