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Standard Ed. 7
DRAFT ea-b59
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javax.swing
Class AbstractAction

java.lang.Object
  extended by javax.swing.AbstractAction
All Implemented Interfaces:
ActionListener, Serializable, Cloneable, EventListener, Action
Direct Known Subclasses:
BasicDesktopPaneUI.CloseAction, BasicDesktopPaneUI.MaximizeAction, BasicDesktopPaneUI.MinimizeAction, BasicDesktopPaneUI.NavigateAction, BasicDesktopPaneUI.OpenAction, BasicFileChooserUI.ApproveSelectionAction, BasicFileChooserUI.CancelSelectionAction, BasicFileChooserUI.ChangeToParentDirectoryAction, BasicFileChooserUI.GoHomeAction, BasicFileChooserUI.NewFolderAction, BasicFileChooserUI.UpdateAction, BasicInternalFrameTitlePane.CloseAction, BasicInternalFrameTitlePane.IconifyAction, BasicInternalFrameTitlePane.MaximizeAction, BasicInternalFrameTitlePane.MoveAction, BasicInternalFrameTitlePane.RestoreAction, BasicInternalFrameTitlePane.SizeAction, BasicSliderUI.ActionScroller, BasicTreeUI.TreeCancelEditingAction, BasicTreeUI.TreeHomeAction, BasicTreeUI.TreeIncrementAction, BasicTreeUI.TreePageAction, BasicTreeUI.TreeToggleAction, BasicTreeUI.TreeTraverseAction, MetalFileChooserUI.DirectoryComboBoxAction, TextAction
public abstract class AbstractAction
extends Object
implements Action, Cloneable, Serializable

This class provides default implementations for the JFC Action interface. Standard behaviors like the get and set methods for Action object properties (icon, text, and enabled) are defined here. The developer need only subclass this abstract class and define the actionPerformed method.

Warning: Serialized objects of this class will not be compatible with future Swing releases. The current serialization support is appropriate for short term storage or RMI between applications running the same version of Swing. As of 1.4, support for long term storage of all JavaBeansTM has been added to the java.beans package. Please see XMLEncoder.

See Also:
Action

Field Summary
Modifier and Type Field and Description
protected  SwingPropertyChangeSupport changeSupport
          If any PropertyChangeListeners have been registered, the changeSupport field describes them.
protected  boolean enabled
          Specifies whether action is enabled; the default is true.
 
Fields inherited from interface javax.swing.Action
ACCELERATOR_KEY, ACTION_COMMAND_KEY, DEFAULT, DISPLAYED_MNEMONIC_INDEX_KEY, LARGE_ICON_KEY, LONG_DESCRIPTION, MNEMONIC_KEY, NAME, SELECTED_KEY, SHORT_DESCRIPTION, SMALL_ICON
 
Constructor Summary
Constructor and Description
AbstractAction()
          Creates an Action.
AbstractAction(String name)
          Creates an Action with the specified name.
AbstractAction(String name, Icon icon)
          Creates an Action with the specified name and small icon.
 
Method Summary
Modifier and Type Method and Description
 void addPropertyChangeListener(PropertyChangeListener listener)
          Adds a PropertyChangeListener to the listener list.
protected  Object clone()
          Clones the abstract action.
protected  void firePropertyChange(String propertyName, Object oldValue, Object newValue)
          Supports reporting bound property changes.
 Object[] getKeys()
          Returns an array of Objects which are keys for which values have been set for this AbstractAction, or null if no keys have values set.
 PropertyChangeListener[] getPropertyChangeListeners()
          Returns an array of all the PropertyChangeListeners added to this AbstractAction with addPropertyChangeListener().
 Object getValue(String key)
          Gets the Object associated with the specified key.
 boolean isEnabled()
          Returns true if the action is enabled.
 void putValue(String key, Object newValue)
          Sets the Value associated with the specified key.
 void removePropertyChangeListener(PropertyChangeListener listener)
          Removes a PropertyChangeListener from the listener list.
 void setEnabled(boolean newValue)
          Sets whether the Action is enabled.
 
Methods inherited from class java.lang.Object
equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface java.awt.event.ActionListener
actionPerformed
 

Field Detail

enabled

protected boolean enabled
Specifies whether action is enabled; the default is true.

changeSupport

protected SwingPropertyChangeSupport changeSupport
If any PropertyChangeListeners have been registered, the changeSupport field describes them.

Constructor Detail

AbstractAction

public AbstractAction()
Creates an Action.

AbstractAction

public AbstractAction(String name)
Creates an Action with the specified name.

Parameters:
name - the name (Action.NAME) for the action; a value of null is ignored

AbstractAction

public AbstractAction(String name,
                      Icon icon)
Creates an Action with the specified name and small icon.

Parameters:
name - the name (Action.NAME) for the action; a value of null is ignored
icon - the small icon (Action.SMALL_ICON) for the action; a value of null is ignored
Method Detail

getValue

public Object getValue(String key)
Gets the Object associated with the specified key.

Specified by:
getValue in interface Action
Parameters:
key - a string containing the specified key
Returns:
the binding Object stored with this key; if there are no keys, it will return null
See Also:
Action.getValue(java.lang.String)

putValue

public void putValue(String key,
                     Object newValue)
Sets the Value associated with the specified key.

Specified by:
putValue in interface Action
Parameters:
key - the String that identifies the stored object
newValue - the Object to store using this key
See Also:
Action.putValue(java.lang.String, java.lang.Object)

isEnabled

public boolean isEnabled()
Returns true if the action is enabled.

Specified by:
isEnabled in interface Action
Returns:
true if the action is enabled, false otherwise
See Also:
Action.isEnabled()

setEnabled

public void setEnabled(boolean newValue)
Sets whether the Action is enabled. The default is true.

Specified by:
setEnabled in interface Action
Parameters:
newValue - true to enable the action, false to disable it
See Also:
Action.setEnabled(boolean)

getKeys

public Object[] getKeys()
Returns an array of Objects which are keys for which values have been set for this AbstractAction, or null if no keys have values set.

Returns:
an array of key objects, or null if no keys have values set
Since:
1.3

firePropertyChange

protected void firePropertyChange(String propertyName,
                                  Object oldValue,
                                  Object newValue)
Supports reporting bound property changes. This method can be called when a bound property has changed and it will send the appropriate PropertyChangeEvent to any registered PropertyChangeListeners.

addPropertyChangeListener

public void addPropertyChangeListener(PropertyChangeListener listener)
Adds a PropertyChangeListener to the listener list. The listener is registered for all properties.

A PropertyChangeEvent will get fired in response to setting a bound property, e.g. setFont, setBackground, or setForeground. Note that if the current component is inheriting its foreground, background, or font from its container, then no event will be fired in response to a change in the inherited property.

Specified by:
addPropertyChangeListener in interface Action
Parameters:
listener - The PropertyChangeListener to be added
See Also:
Action.addPropertyChangeListener(java.beans.PropertyChangeListener)

removePropertyChangeListener

public void removePropertyChangeListener(PropertyChangeListener listener)
Removes a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.

Specified by:
removePropertyChangeListener in interface Action
Parameters:
listener - the PropertyChangeListener to be removed
See Also:
Action.removePropertyChangeListener(java.beans.PropertyChangeListener)

getPropertyChangeListeners

public PropertyChangeListener[] getPropertyChangeListeners()
Returns an array of all the PropertyChangeListeners added to this AbstractAction with addPropertyChangeListener().

Returns:
all of the PropertyChangeListeners added or an empty array if no listeners have been added
Since:
1.4

clone

protected Object clone()
                throws CloneNotSupportedException
Clones the abstract action. This gives the clone its own copy of the key/value list, which is not handled for you by Object.clone().

Overrides:
clone in class Object
Returns:
a clone of this instance.
Throws:
CloneNotSupportedException - if the object's class does not support the Cloneable interface. Subclasses that override the clone method can also throw this exception to indicate that an instance cannot be cloned.
See Also:
Cloneable
Overview  Package   Class  Use  Tree  Deprecated  Index  Help 
Java™ Platform
Standard Ed. 7
DRAFT ea-b59
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SUMMARY: NESTED | FIELD | CONSTR | METHOD DETAIL: FIELD | CONSTR | METHOD