bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/TextModifyListenerImpl.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.Text;\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 public abstract class TextModifyListenerImpl<T> implements TextModifyListener, Widget {\r
  25 \r
  26         protected ISessionContext context;\r
  27         protected Object lastInput = null;\r
  28 \r
  29         protected final Class<?> clazz;\r
  30 \r
  31         public TextModifyListenerImpl() {\r
  32                 clazz = ReflectionUtils.getSingleParameterType(getClass());\r
  33         }\r
  34 \r
  35         private Object getInputContents(Object input, Class<?> inputClass) {\r
  36                 if (inputClass.isInstance(input))\r
  37                         return input;\r
  38                 if (input instanceof ISelection)\r
  39                         return ISelectionUtils.filterSingleSelection(input, inputClass);\r
  40                 return null;\r
  41         }\r
  42 \r
  43         @Override\r
  44         public void modifyText(TrackedModifyEvent e) {\r
  45 \r
  46                 Text text = (Text)e.getWidget();\r
  47                 final String textValue = text.getText();\r
  48                 final Object input = lastInput;\r
  49 \r
  50                 try {\r
  51                         context.getSession().syncRequest(new WriteRequest() {\r
  52 \r
  53                                 @SuppressWarnings("unchecked")\r
  54                                 @Override\r
  55                                 public void perform(WriteGraph graph) throws DatabaseException {\r
  56                                         graph.markUndoPoint();\r
  57                                         if(clazz.isInstance(input)) {\r
  58                                                 applyText(graph, (T)input, textValue);\r
  59                                                 Layer0Utils.addCommentMetadata(graph, "Modified " + input.toString() + " to " + textValue);\r
  60                                         } else {\r
  61                                                 T single = (T)getInputContents(input, clazz);\r
  62                                                 if(single != null) {\r
  63                                                         applyText(graph, single, textValue);\r
  64                                                         Layer0Utils.addCommentMetadata(graph, "Modified " + single.toString() + " to " + textValue);\r
  65                                                 }\r
  66                                         }\r
  67                                         \r
  68                                         \r
  69                                 }\r
  70                                 \r
  71                         });\r
  72                 } catch (DatabaseException e1) {\r
  73                         e1.printStackTrace();\r
  74                 }\r
  75         }\r
  76 \r
  77         @Override\r
  78         public void setInput(ISessionContext context, Object parameter) {\r
  79                 this.context = context;\r
  80                 lastInput = parameter;\r
  81         }\r
  82 \r
  83         abstract public void applyText(WriteGraph graph, T input, String text) throws DatabaseException;\r
  84 \r
  85 }\r
  86