bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/widgets/impl/MouseListenerImpl.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.events.MouseEvent;
  16 import org.eclipse.swt.events.MouseListener;
  17 import org.simantics.db.WriteGraph;
  18 import org.simantics.db.common.request.WriteRequest;
  19 import org.simantics.db.exception.DatabaseException;
  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 MouseListenerImpl<T> implements MouseListener, Widget {
  25
  26         private ISessionContext context;
  27         private Object lastInput = null;
  28         protected T single;
  29     final private Class<?> clazz;
  30
  31         public MouseListenerImpl(ISessionContext context) {
  32                 this.context = context;
  33         clazz = ReflectionUtils.getSingleParameterType(getClass());
  34         }
  35
  36         @Override
  37         public void mouseDown(MouseEvent e) {
  38         }
  39
  40         @Override
  41         public void mouseUp(MouseEvent e) {
  42         }
  43
  44         @Override
  45         public void mouseDoubleClick(MouseEvent e) {
  46
  47                 final Object input = lastInput;
  48
  49
  50                 try {
  51
  52                         single = (T) ISelectionUtils.filterSingleSelection((ISelection)input, clazz);
  53
  54                         beforeApply(single);
  55
  56                         context.getSession().syncRequest(new WriteRequest() {
  57
  58                                 @SuppressWarnings("unchecked")
  59                 @Override
  60                                 public void perform(WriteGraph graph) throws DatabaseException {
  61
  62 //                                      T single = (T) ISelectionUtils.filterSingleSelection((ISelection)input, clazz);
  63                                         doubleClick(graph, single);
  64
  65                                 }
  66
  67                         });
  68                 } catch (DatabaseException e1) {
  69                         e1.printStackTrace();
  70                 }
  71         }
  72
  73         @Override
  74         public void setInput(ISessionContext context, Object parameter) {
  75                 this.context = context;
  76                 lastInput = parameter;
  77         }
  78
  79         public void beforeApply(T input) {
  80
  81         }
  82
  83         abstract public void doubleClick(WriteGraph graph, T input) throws DatabaseException;
  84
  85 }
  86