Home

Contribute

Source code


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131

/***************************************************************************
 * Copyright (c) 2004-2007 Eike Stepper, Germany.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 * 
 * Contributors:
 *    Eike Stepper - initial API and implementation
 **************************************************************************/
package org.eclipse.net4j.ui.views;

import org.eclipse.net4j.internal.ui.bundle.Net4jUI;
import org.eclipse.net4j.ui.StructuredContentProvider;

import org.eclipse.jface.action.IMenuManager;
import org.eclipse.jface.viewers.ILabelProvider;
import org.eclipse.jface.viewers.ILabelProviderListener;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.ITreeSelection;
import org.eclipse.jface.viewers.LabelProviderChangedEvent;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;

import java.util.ArrayList;
import java.util.List;

public abstract class ItemProvider<INPUT> extends StructuredContentProvider<INPUT> implements ITreeContentProvider,
    ILabelProvider
{
  protected static final Object[] NO_CHILDREN = new Object[0];

  private List<ILabelProviderListener> listeners = new ArrayList(0);

  public ItemProvider()
  {
  }

  public final Object[] getElements(Object parent)
  {
    return getChildren(parent);
  }

  public boolean hasChildren(Object parent)
  {
    return getChildren(parent).length != 0;
  }

  public String getText(Object obj)
  {
    return obj.toString();
  }

  public Image getImage(Object obj)
  {
    String imageKey = ISharedImages.IMG_OBJ_ELEMENT;
    return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
  }

  public boolean isLabelProperty(Object element, String property)
  {
    return true;
  }

  public ILabelProviderListener[] getListeners()
  {
    synchronized (listeners)
    {
      return listeners.toArray(new ILabelProviderListener[listeners.size()]);
    }
  }

  public void addListener(ILabelProviderListener listener)
  {
    synchronized (listeners)
    {
      listeners.add(listener);
    }
  }

  public void removeListener(ILabelProviderListener listener)
  {
    synchronized (listeners)
    {
      listeners.remove(listener);
    }
  }

  protected void fillContextMenu(IMenuManager manager, ITreeSelection selection)
  {
  }

  protected void fireLabelProviderChanged()
  {
    fireLabelProviderChanged(new LabelProviderChangedEvent(this));
  }

  protected void fireLabelProviderChanged(Object element)
  {
    fireLabelProviderChanged(new LabelProviderChangedEvent(this, element));
  }

  protected void fireLabelProviderChanged(Object[] elements)
  {
    fireLabelProviderChanged(new LabelProviderChangedEvent(this, elements));
  }

  /**
   * Fires a label provider changed event to all registered listeners Only
   * listeners registered at the time this method is called are notified.
   * 
   * @param event
   *          a label provider changed event
   * @see ILabelProviderListener#labelProviderChanged
   */
  private void fireLabelProviderChanged(LabelProviderChangedEvent event)
  {
    for (ILabelProviderListener listener : getListeners())
    {
      try
      {
        listener.labelProviderChanged(event);
      }
      catch (Exception ex)
      {
        Net4jUI.LOG.error(ex);
      }
    }
  }
}