bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/TableSelectionListenerImpl.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 java.util.List;\r
  15 \r
  16 import org.eclipse.jface.viewers.ISelection;\r
  17 import org.eclipse.swt.events.SelectionEvent;\r
  18 import org.eclipse.swt.events.SelectionListener;\r
  19 import org.eclipse.swt.widgets.Table;\r
  20 import org.simantics.db.WriteGraph;\r
  21 import org.simantics.db.common.request.WriteRequest;\r
  22 import org.simantics.db.exception.DatabaseException;\r
  23 import org.simantics.db.management.ISessionContext;\r
  24 import org.simantics.utils.ReflectionUtils;\r
  25 import org.simantics.utils.datastructures.Pair;\r
  26 import org.simantics.utils.ui.ISelectionUtils;\r
  27 \r
  28 abstract public class TableSelectionListenerImpl<T, T2> implements SelectionListener, Widget {\r
  29 \r
  30         private ISessionContext context;\r
  31         private Object lastInput = null;\r
  32         \r
  33     final private Class<?> clazz;\r
  34         \r
  35         public TableSelectionListenerImpl() {\r
  36         clazz = ReflectionUtils.getSingleParameterType(getClass());\r
  37         }\r
  38         \r
  39         @Override\r
  40         public void widgetDefaultSelected(SelectionEvent e) {\r
  41                 widgetSelected(e);\r
  42         }\r
  43         \r
  44         @Override\r
  45         public void widgetSelected(SelectionEvent e) {\r
  46 \r
  47                 Table table = (Table)e.getSource();\r
  48                 @SuppressWarnings("unchecked")\r
  49                 List<Pair<String, Object>> items = (List<Pair<String, Object>>)table.getData();\r
  50                 Pair<String, Object> pair = (Pair<String, Object>)items.get(table.getSelectionIndex());\r
  51                 final Object selection = pair.second;\r
  52                 final Object input = lastInput;\r
  53                 \r
  54                 try {\r
  55                         context.getSession().syncRequest(new WriteRequest() {\r
  56 \r
  57                                 @SuppressWarnings("unchecked")\r
  58                                 @Override\r
  59                                 public void perform(WriteGraph graph) throws DatabaseException {\r
  60 \r
  61                                         T single = (T) ISelectionUtils.filterSingleSelection((ISelection)input, clazz);\r
  62                                         applySelection(graph, single, (T2)selection);\r
  63                                         \r
  64                                 }\r
  65                                 \r
  66                         });\r
  67                 } catch (DatabaseException e1) {\r
  68                         e1.printStackTrace();\r
  69                 }\r
  70                 \r
  71         }\r
  72 \r
  73         @Override\r
  74         public void setInput(ISessionContext context, Object parameter) {\r
  75                 this.context = context;\r
  76                 lastInput = parameter;\r
  77         }\r
  78         \r
  79         abstract public void applySelection(WriteGraph graph, T input, T2 selection) throws DatabaseException;\r
  80         \r
  81 }\r
  82