javax.swing
class AbstractAction

java.lang.Object javax.swing.AbstractAction

All Implemented Interfaces:

Serializable, Cloneable, 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 JavaBeans^TM has been added to the java.beans package. Please see {@link java.beans.XMLEncoder}.

changeSupport

protected SwingPropertyChangeSupport changeSupport

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

enabled

protected boolean enabled

Specifies whether action is enabled; the default is true.

AbstractAction

public AbstractAction()

Defines an Action object with a default description string and default icon.

AbstractAction

public AbstractAction(String name)

Defines an Action object with the specified description string and a default icon.

Parameters:

name

AbstractAction

public AbstractAction(String name,
                      Icon icon)

Defines an Action object with the specified description string and a the specified icon.

Parameters:

name

icon

addPropertyChangeListener

public synchronized 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.

Parameters:

listener - The PropertyChangeListener to be added

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

Throws:

CloneNotSupportedException

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.

Parameters:

propertyName

oldValue

newValue

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

getPropertyChangeListeners

public synchronized 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

getValue

public Object getValue(String key)

Gets the Object associated with the specified key.

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

isEnabled

public boolean isEnabled()

Returns true if the action is enabled.

Returns:

true if the action is enabled, false otherwise

putValue

public void putValue(String key,
                     Object newValue)

Sets the Value associated with the specified key.

Parameters:

key - the String that identifies the stored object

newValue - the Object to store using this key

removePropertyChangeListener

public synchronized void removePropertyChangeListener(PropertyChangeListener listener)

Removes a PropertyChangeListener from the listener list. This removes a PropertyChangeListener that was registered for all properties.

Parameters:

listener - the PropertyChangeListener to be removed

setEnabled

public void setEnabled(boolean newValue)

Enables or disables the action.

Parameters:

newValue - true to enable the action, false to disable it