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

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2012 Association for Decentralized Information Management
   3  * in 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.browsing.ui.swt.widgets.impl;
  13
  14 import java.util.List;
  15
  16 import org.eclipse.jface.viewers.ISelection;
  17 import org.eclipse.swt.events.SelectionEvent;
  18 import org.eclipse.swt.events.SelectionListener;
  19 import org.eclipse.swt.widgets.Table;
  20 import org.simantics.db.WriteGraph;
  21 import org.simantics.db.common.request.WriteRequest;
  22 import org.simantics.db.exception.DatabaseException;
  23 import org.simantics.db.management.ISessionContext;
  24 import org.simantics.utils.ReflectionUtils;
  25 import org.simantics.utils.datastructures.Pair;
  26 import org.simantics.utils.ui.ISelectionUtils;
  27
  28 abstract public class TableSelectionListenerImpl<T, T2> implements SelectionListener, Widget {
  29
  30         private ISessionContext context;
  31         private Object lastInput = null;
  32
  33     final private Class<?> clazz;
  34
  35         public TableSelectionListenerImpl() {
  36         clazz = ReflectionUtils.getSingleParameterType(getClass());
  37         }
  38
  39         @Override
  40         public void widgetDefaultSelected(SelectionEvent e) {
  41                 widgetSelected(e);
  42         }
  43
  44         @Override
  45         public void widgetSelected(SelectionEvent e) {
  46
  47                 Table table = (Table)e.getSource();
  48                 @SuppressWarnings("unchecked")
  49                 List<Pair<String, Object>> items = (List<Pair<String, Object>>)table.getData();
  50                 Pair<String, Object> pair = (Pair<String, Object>)items.get(table.getSelectionIndex());
  51                 final Object selection = pair.second;
  52                 final Object input = lastInput;
  53
  54                 try {
  55                         context.getSession().syncRequest(new WriteRequest() {
  56
  57                                 @SuppressWarnings("unchecked")
  58                                 @Override
  59                                 public void perform(WriteGraph graph) throws DatabaseException {
  60
  61                                         T single = (T) ISelectionUtils.filterSingleSelection((ISelection)input, clazz);
  62                                         applySelection(graph, single, (T2)selection);
  63
  64                                 }
  65
  66                         });
  67                 } catch (DatabaseException e1) {
  68                         e1.printStackTrace();
  69                 }
  70
  71         }
  72
  73         @Override
  74         public void setInput(ISessionContext context, Object parameter) {
  75                 this.context = context;
  76                 lastInput = parameter;
  77         }
  78
  79         abstract public void applySelection(WriteGraph graph, T input, T2 selection) throws DatabaseException;
  80
  81 }
  82