net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/ui/packageview/SelectionTransferDragAdapter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package net.sourceforge.phpdt.internal.ui.packageview;
  12
  13 import java.util.Iterator;
  14
  15 import net.sourceforge.phpdt.core.IJavaElement;
  16 import net.sourceforge.phpdt.core.IPackageFragmentRoot;
  17
  18 import net.sourceforge.phpdt.internal.ui.dnd.BasicSelectionTransferDragAdapter;
  19 import org.eclipse.jface.viewers.ISelection;
  20 import org.eclipse.jface.viewers.ISelectionProvider;
  21 import org.eclipse.jface.viewers.IStructuredSelection;
  22
  23 public class SelectionTransferDragAdapter extends BasicSelectionTransferDragAdapter {
  24
  25         public SelectionTransferDragAdapter(ISelectionProvider provider) {
  26                 super(provider);
  27         }
  28
  29         protected boolean isDragable(ISelection selection) {
  30                 if (selection instanceof IStructuredSelection) {
  31                         for (Iterator iter= ((IStructuredSelection)selection).iterator(); iter.hasNext();) {
  32                                 Object element= iter.next();
  33                                 if (element instanceof IJavaElement) {
  34                                         IPackageFragmentRoot root= (IPackageFragmentRoot)((IJavaElement)element).getAncestor(IJavaElement.PACKAGE_FRAGMENT_ROOT);
  35                                         if (root != null && root.isArchive())
  36                                                 return false;
  37                                 }
  38                         }
  39                         return true;
  40                 }
  41                 return false;
  42         }
  43 }