libjava/java/awt/PopupMenu.java

   1 /* PopupMenu.java -- An AWT popup menu
   2    Copyright (C) 1999, 2000, 2001, 2002, 2004  Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package java.awt;
  40
  41 import java.awt.peer.PopupMenuPeer;
  42
  43 import javax.accessibility.AccessibleContext;
  44 import javax.accessibility.AccessibleRole;
  45
  46 /**
  47   * This class implement an AWT popup menu widget
  48   *
  49   * @author Aaron M. Renn (arenn@urbanophile.com)
  50   */
  51 public class PopupMenu extends Menu
  52 {
  53
  54 /*
  55  * Static Variables
  56  */
  57
  58 // Serialization Constant
  59 private static final long serialVersionUID = -4620452533522760060L;
  60
  61 /*************************************************************************/
  62
  63 /*
  64  * Constructors
  65  */
  66
  67 /**
  68   * Initializes a new instance of <code>PopupMenu</code>.
  69   *
  70   * @exception HeadlessException If GraphicsEnvironment.isHeadless()
  71   * returns true.
  72   */
  73 public
  74 PopupMenu()
  75 {
  76 }
  77
  78 /*************************************************************************/
  79
  80 /**
  81   * Initializes a new instance of <code>PopupMenu</code> with the specified
  82   * label.
  83   *
  84   * @param label The label for this popup menu.
  85   *
  86   * @exception HeadlessException If GraphicsEnvironment.isHeadless()
  87   * returns true.
  88   */
  89 public
  90 PopupMenu(String label)
  91 {
  92   super(label);
  93
  94   if (GraphicsEnvironment.isHeadless())
  95     throw new HeadlessException ();
  96 }
  97
  98 /*************************************************************************/
  99
 100 /*
 101  * Instance Methods
 102  */
 103
 104 /**
 105   * Creates this object's native peer.
 106   */
 107 public void
 108 addNotify()
 109 {
 110   if (peer == null)
 111     peer = getToolkit ().createPopupMenu (this);
 112   super.addNotify ();
 113 }
 114
 115 /*************************************************************************/
 116
 117 /**
 118   * Displays this popup menu at the specified coordinates relative to
 119   * the specified component.
 120   *
 121   * @param component The component to which the display coordinates are relative.
 122   * @param x The X coordinate of the menu.
 123   * @param y The Y coordinate of the menu.
 124   */
 125 public void
 126 show(Component component, int x, int y)
 127 {
 128   if (getPeer() == null)
 129     this.addNotify();
 130   PopupMenuPeer pmp = (PopupMenuPeer)getPeer();
 131   if (pmp != null)
 132     {
 133       /* XXX
 134       Event e = new Event (component, Event.ACTION_EVENT, component);
 135       e.x = x;
 136       e.y = y;*/
 137       pmp.show (component, x, y);
 138     }
 139 }
 140
 141   protected class AccessibleAWTPopupMenu extends AccessibleAWTMenu
 142   {
 143     protected AccessibleAWTPopupMenu()
 144     {
 145     }
 146
 147     public AccessibleRole getAccessibleRole()
 148     {
 149       return AccessibleRole.POPUP_MENU;
 150     }
 151
 152   }
 153
 154   /**
 155    * Gets the AccessibleContext associated with this <code>PopupMenu</code>.
 156    * The context is created, if necessary.
 157    *
 158    * @return the associated context
 159    */
 160   public AccessibleContext getAccessibleContext()
 161   {
 162     /* Create the context if this is the first request */
 163     if (accessibleContext == null)
 164       accessibleContext = new AccessibleAWTPopupMenu();
 165     return accessibleContext;
 166   }
 167
 168 } // class PopupMenu
 169