/* Action.java --
   Copyright (C) 2002, 2004, 2005, 2012 Free Software Foundation, Inc.

This file is part of GNU Classpath.

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it under the terms of the GNU General Public License as published by
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permission to link this library with independent modules to produce an
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package cc.kune.common.client.actions;

// TODO: Auto-generated Javadoc
/**
 * Provides a convenient central point of control for some task that can be
 * triggered by more than one control in a Swing user interface (for example, a
 * menu item and a toolbar button).
 * 
 * @author Ronald Veldema (rveldema@cs.vu.nl)
 * @author Adapted version for GWT (C) The kune development team
 * @author Andrew Selkirk
 */
public interface Action extends ActionListener {

  /**
   * A key to access the KeyStroke used as the accelerator for the action.
   */
  String ACCELERATOR_KEY = "AcceleratorKey";

  /**
   * A key to access the action command string for the action.
   */
  String ACTION_COMMAND_KEY = "ActionCommandKey";

  /**
   * A key to access the default property for the action (this is not used).
   */
  String DEFAULT = "Default";

  /**
   * A key to access the enabled property for the action.
   */
  String ENABLED = "enabled";

  /**
   * A key to access the long description for the action.
   */
  String LONG_DESCRIPTION = "LongDescription";

  /**
   * A key to access the mnemonic for the action.
   */
  String MNEMONIC_KEY = "MnemonicKey";

  /**
   * A key to access the name for the action.
   */
  String NAME = "Name";

  /**
   * A key to access the short description for the action (the short description
   * is typically used as the tool tip text).
   */
  String TOOLTIP = "ShortDescription";

  /**
   * A key to access the icon for the action.
   */
  String SMALL_ICON = "SmallIcon";

  /**
   * A key to access the mnemonic for the action.
   */
  String STYLES = "Styles";

  /**
   * Registers a listener to receive notification whenever one of the action's
   * properties is modified.
   * 
   * @param listener
   *          the listener.
   */
  void addPropertyChangeListener(PropertyChangeListener listener);

  /**
   * Returns the value associated with the specified key.
   * 
   * @param key
   *          the key (not <code>null</code>).
   * 
   * @return The value associated with the specified key, or <code>null</code>
   *         if the key is not found.
   */
  Object getValue(String key);

  /**
   * Returns the flag that indicates whether or not this action is enabled.
   * 
   * @return The flag.
   */
  boolean isEnabled();

  /**
   * Sets the value associated with the specified key and sends a.
   *
   * @param key the key (not <code>null</code>).
   * @param value the value (<code>null</code> permitted).
   * {@link PropertyChangeEvent} to all registered listeners. The standard keys
   * are defined in this interface: {@link #NAME}, {@link #TOOLTIP},
   * {@link #LONG_DESCRIPTION}, {@link #SMALL_ICON}, {@link #ACTION_COMMAND_KEY}
   * , {@link #ACCELERATOR_KEY} and {@link #MNEMONIC_KEY}. Any existing value
   * associated with the key will be overwritten.
   */
  void putValue(String key, Object value);

  /**
   * Deregisters a listener so that it no longer receives notification of
   * changes to the action's properties.
   * 
   * @param listener
   *          the listener.
   */
  void removePropertyChangeListener(PropertyChangeListener listener);

  /**
   * Sets the flag that indicates whether or not this action is enabled. If the
   * value changes, a {@link java.beans.PropertyChangeEvent} is sent to all
   * registered listeners.
   * 
   * @param b
   *          the new value of the flag.
   */
  void setEnabled(boolean b);

} // Action