eclipseprojects/eu.etaxonomy.taxeditor/src/eu/etaxonomy/taxeditor/editor/GroupComposite.java

   1 /**
   2 * Copyright (C) 2007 EDIT
   3 * European Distributed Institute of Taxonomy
   4 * http://www.e-taxonomy.eu
   5 *
   6 * The contents of this file are subject to the Mozilla Public License Version 1.1
   7 * See LICENSE.TXT at the top of this package for the full license terms.
   8 */
   9
  10 package eu.etaxonomy.taxeditor.editor;
  11
  12 import org.apache.log4j.Logger;
  13 import org.eclipse.swt.SWT;
  14 import org.eclipse.swt.dnd.DND;
  15 import org.eclipse.swt.dnd.DropTarget;
  16 import org.eclipse.swt.dnd.DropTargetAdapter;
  17 import org.eclipse.swt.dnd.DropTargetEvent;
  18 import org.eclipse.swt.dnd.DropTargetListener;
  19 import org.eclipse.swt.dnd.Transfer;
  20 import org.eclipse.swt.graphics.Color;
  21 import org.eclipse.swt.widgets.Composite;
  22 import org.eclipse.ui.forms.widgets.TableWrapData;
  23 import org.eclipse.ui.forms.widgets.TableWrapLayout;
  24
  25 import eu.etaxonomy.taxeditor.ITaxEditorConstants;
  26 import eu.etaxonomy.taxeditor.TaxEditorPlugin;
  27 import eu.etaxonomy.taxeditor.actions.WidgetTransfer;
  28
  29 /**
  30  * @author p.ciardelli
  31  * @created 25.06.2008
  32  * @version 1.0
  33  */
  34 public class GroupComposite extends Composite {
  35         private static final Logger logger = Logger.getLogger(GroupComposite.class);
  36
  37         private DropTarget target;
  38         private DropTargetListener dropListener;
  39
  40         public GroupComposite(Composite parent) {
  41                 super(parent, SWT.NONE);
  42
  43                 // Graphic layout of composite
  44                 this.setLayoutData(new TableWrapData(TableWrapData.FILL_GRAB));
  45                 this.setLayout(new TableWrapLayout());
  46                 Color groupBackgroundColor = TaxEditorPlugin.getDefault().
  47                                 getColor(ITaxEditorConstants.GROUP_GRAY_BKG_COLOR);
  48                 this.setBackground(groupBackgroundColor);
  49
  50                 // Drop functionality
  51                 this.setDroppable(true);
  52
  53         }
  54
  55         public void setDroppable(boolean droppable) {
  56                 if (droppable) {
  57                         Transfer[] types = new Transfer[] {WidgetTransfer.getInstance()};
  58                         int operations = DND.DROP_MOVE | DND.DROP_COPY | DND.DROP_DEFAULT;
  59                         target = new DropTarget(this, operations);
  60                         target.setTransfer(types);
  61                         dropListener = new DropTargetAdapter() {
  62
  63                                 public void dragEnter(DropTargetEvent event) {
  64                                         GroupComposite.this.notifyListeners(SWT.FocusIn, null);
  65                                 }
  66
  67                                 public void dragLeave(DropTargetEvent event) {
  68                                         GroupComposite.this.notifyListeners(SWT.FocusOut, null);
  69                                 }
  70
  71                                 public void drop(DropTargetEvent event) {
  72
  73                                         if (event.data instanceof Composite) {
  74                                                 Composite composite = (Composite) event.data;
  75                                                 if ( ! composite.getParent().equals(GroupComposite.this)) {
  76                                                         composite.setParent(GroupComposite.this);
  77                                                 }
  78                                         }
  79                                 }
  80                         };
  81                         target.addDropListener(dropListener);
  82                 } else {
  83                         if (dropListener != null) {
  84                                 target.removeDropListener(dropListener);
  85                         }
  86                 }
  87         }
  88
  89         public void dispose() {
  90
  91                 target.removeDropListener(dropListener);
  92
  93 //              for (Control control : getChildren()) {
  94 //                      if (!control.isDisposed()) {
  95 //                              control.dispose();
  96 //                      }
  97 //              }
  98
  99                 super.dispose();
 100         }
 101 }