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