bundles/org.simantics.browsing.ui.swt/src/org/simantics/browsing/ui/swt/DefaultExplorerSelectionListener.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 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;
  13
  14 import org.eclipse.jface.viewers.IPostSelectionProvider;
  15 import org.eclipse.jface.viewers.ISelection;
  16 import org.eclipse.ui.ISelectionListener;
  17 import org.eclipse.ui.IWorkbenchPart;
  18 import org.eclipse.ui.services.IDisposable;
  19 import org.simantics.browsing.ui.GraphExplorer;
  20
  21 public class DefaultExplorerSelectionListener implements ISelectionListener, IDisposable {
  22
  23     private static final boolean DEBUG = false;
  24
  25     IWorkbenchPart           owner;
  26     GraphExplorer            explorer;
  27     WorkbenchSelectionFilter filter;
  28
  29     public DefaultExplorerSelectionListener(IWorkbenchPart owner, GraphExplorer explorer) {
  30         this(owner, explorer, ResourceSelectionFilter.FILTER);
  31     }
  32
  33     public DefaultExplorerSelectionListener(IWorkbenchPart owner, GraphExplorer explorer, WorkbenchSelectionFilter filter) {
  34         this.owner = owner;
  35         this.explorer = explorer;
  36         this.filter = filter;
  37     }
  38
  39     @Override
  40     public void dispose() {
  41         owner = null;
  42         explorer = null;
  43         filter = null;
  44     }
  45
  46     @Override
  47     public void selectionChanged(IWorkbenchPart part, ISelection selection) {
  48         // Always disregard own selections.
  49         if (part == owner)
  50             return;
  51
  52         if (DEBUG)
  53             System.out.println("[" + owner + "] workbench selection changed: part=" + part + ", selection=" + selection);
  54         ISelection s = selection;
  55         WorkbenchSelectionFilter filter = this.filter;
  56         if (filter != null)
  57             s = filter.filterSelection(part, selection);
  58
  59         if (s != null) {
  60             if (DEBUG) {
  61                 System.out.println("** [" + owner + "] workbench selection changed: part=" + part + ", selection=" + selection);
  62                 System.out.println("    SETTING NEW SELECTION");
  63             }
  64             GraphExplorer explorer = this.explorer;
  65             if(explorer != null && !explorer.isDisposed()) {
  66                 IPostSelectionProvider selectionProvider = (IPostSelectionProvider)explorer.getAdapter(IPostSelectionProvider.class);
  67                 if (selectionProvider != null) {
  68                     selectionProvider.setSelection(selection);
  69                 }
  70             }
  71         } else {
  72             if (DEBUG)
  73                 System.out.println("[" + owner + "] discarding selection: part=" + part + ", selection=" + selection);
  74         }
  75     }
  76 }