Source for javax.swing.Action

   1: /* Action.java --
   2:    Copyright (C) 2002, 2004, 2005 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., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 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: package javax.swing;
  39: 
  40: import java.awt.event.ActionListener;
  41: import java.beans.PropertyChangeListener;
  42: 
  43: /**
  44:  * Provides a convenient central point of control for some task
  45:  * that can be triggered by more than one control in a Swing user interface
  46:  * (for example, a menu item and a toolbar button).
  47:  * 
  48:  * @see AbstractButton#setAction(Action)
  49:  * 
  50:  * @author Ronald Veldema (rveldema@cs.vu.nl)
  51:  * @author Andrew Selkirk
  52:  */
  53: public interface Action extends ActionListener {
  54: 
  55:   /**
  56:    * A key to access the default property for the action (this is not used).
  57:    */
  58:   String DEFAULT = "Default";
  59: 
  60:   /**
  61:    * A key to access the long description for the action.
  62:    */
  63:   String LONG_DESCRIPTION = "LongDescription";
  64: 
  65:   /**
  66:    * A key to access the name for the action.
  67:    */
  68:   String NAME = "Name";
  69: 
  70:   /**
  71:    * A key to access the short description for the action (the short
  72:    * description is typically used as the tool tip text).
  73:    */
  74:   String SHORT_DESCRIPTION = "ShortDescription";
  75: 
  76:   /**
  77:    * A key to access the icon for the action.
  78:    */
  79:   String SMALL_ICON = "SmallIcon";
  80: 
  81:   /**
  82:    * A key to access the {@link KeyStroke} used as the accelerator for the
  83:    * action.
  84:    */
  85:   String ACCELERATOR_KEY = "AcceleratorKey";
  86: 
  87:   /**
  88:    * A key to access the action command string for the action.
  89:    */
  90:   String ACTION_COMMAND_KEY = "ActionCommandKey";
  91: 
  92:   /**
  93:    * A key to access the mnemonic for the action.
  94:    */
  95:   String MNEMONIC_KEY = "MnemonicKey";
  96: 
  97:   /**
  98:    * Returns the value associated with the specified key.
  99:    * 
 100:    * @param key  the key (not <code>null</code>).
 101:    * 
 102:    * @return The value associated with the specified key, or 
 103:    *         <code>null</code> if the key is not found.
 104:    */
 105:   Object getValue(String key);
 106: 
 107:   /**
 108:    * Sets the value associated with the specified key and sends a 
 109:    * {@link java.beans.PropertyChangeEvent} to all registered listeners.  
 110:    * The standard keys are defined in this interface: {@link #NAME}, 
 111:    * {@link #SHORT_DESCRIPTION}, {@link #LONG_DESCRIPTION}, 
 112:    * {@link #SMALL_ICON}, {@link #ACTION_COMMAND_KEY}, 
 113:    * {@link #ACCELERATOR_KEY} and {@link #MNEMONIC_KEY}. Any existing value 
 114:    * associated with the key will be overwritten.  
 115:    * 
 116:    * @param key  the key (not <code>null</code>).
 117:    * @param value  the value (<code>null</code> permitted).
 118:    */
 119:   void putValue(String key, Object value);
 120: 
 121:   /**
 122:    * Returns the flag that indicates whether or not this action is enabled.
 123:    * 
 124:    * @return The flag.
 125:    */
 126:   boolean isEnabled();
 127: 
 128:   /**
 129:    * Sets the flag that indicates whether or not this action is enabled.  If
 130:    * the value changes, a {@link java.beans.PropertyChangeEvent} is sent to 
 131:    * all registered listeners.
 132:    * 
 133:    * @param b  the new value of the flag.
 134:    */
 135:   void setEnabled(boolean b);
 136: 
 137:   /**
 138:    * Registers a listener to receive notification whenever one of the
 139:    * action's properties is modified.
 140:    * 
 141:    * @param listener  the listener.
 142:    */
 143:   void addPropertyChangeListener(PropertyChangeListener listener);
 144: 
 145:   /**
 146:    * Deregisters a listener so that it no longer receives notification of
 147:    * changes to the action's properties. 
 148:    * 
 149:    * @param listener  the listener.
 150:    */
 151:   void removePropertyChangeListener(PropertyChangeListener listener);
 152: 
 153: } // Action