home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Visual Cafe 3
/
Visual Cafe 3.ISO
/
Vcafe
/
JFC.bin
/
AbstractAction.java
next >
Wrap
Text File
|
1998-06-30
|
5KB
|
162 lines
/*
* @(#)AbstractAction.java 1.18 98/02/02
*
* Copyright (c) 1997 Sun Microsystems, Inc. All Rights Reserved.
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*
*/
package com.sun.java.swing;
import java.awt.*;
import java.awt.event.*;
import java.beans.*;
import java.util.Hashtable;
import java.io.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 <code>actionPerformed</code> method.
* <p>
* 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 Swing1.0 applications. It will
* not be possible to load serialized Swing1.0 objects with future releases
* of Swing. The JDK1.2 release of Swing will be the compatibility
* baseline for the serialized form of Swing objects.
*
* @version 1.18 02/02/98
* @author Georges Saab
* @see Action
*/
public abstract class AbstractAction implements Action, Cloneable, Serializable
{
protected boolean enabled = true;
// Will be replaced by a lighter weight storage mechanism soon!
private Hashtable keyTable = new Hashtable(5);
/**
* Defines an Action object with a default description string
* and default icon.
*/
public AbstractAction() {}
/**
* Defines an Action object with the specified description string
* and a default icon.
*/
public AbstractAction(String name) {
putValue(Action.NAME, name);
}
/**
* Defines an Action object with the specified description string
* and a the specified icon.
*/
public AbstractAction(String name, Icon icon) {
this(name);
putValue(Action.SMALL_ICON, icon);
}
/** @see Action#getValue */
// Gets the Object associated with key
public Object getValue(String key) {
return keyTable.get(key);
}
/** @see Action#putValue */
// Sets the Value associated with key
public synchronized void putValue(String key, Object newValue) {
Object oldValue = null;
if (keyTable.containsKey(key))
oldValue = keyTable.get(key);
keyTable.put(key,newValue);
firePropertyChange(key, oldValue, newValue);
}
/** @see Action#isEnabled */
public boolean isEnabled() {
return enabled;
}
/** @see Action#setEnabled */
public synchronized void setEnabled(boolean newValue) {
boolean oldValue = this.enabled;
this.enabled = newValue;
firePropertyChange("enabled",
new Boolean(oldValue), new Boolean(newValue));
}
/*
* If any PropertyChangeListeners have been registered, the
* changeSupport field describes them.
*/
protected java.beans.PropertyChangeSupport changeSupport;
/**
* Support for 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.
*/
protected void firePropertyChange(String propertyName, Object oldValue, Object newValue) {
if (changeSupport == null) {
return;
}
changeSupport.firePropertyChange(propertyName, oldValue, newValue);
}
/**
* Add a PropertyChangeListener to the listener list.
* The listener is registered for all properties.
* <p>
* 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.
*
* @param listener The PropertyChangeListener to be added
*
* @see Action#addPropertyChangeListener
*/
public synchronized void addPropertyChangeListener(PropertyChangeListener listener) {
if (changeSupport == null) {
changeSupport = new java.beans.PropertyChangeSupport(this);
}
changeSupport.addPropertyChangeListener(listener);
}
/**
* Remove a PropertyChangeListener from the listener list.
* This removes a PropertyChangeListener that was registered
* for all properties.
*
* @param listener The PropertyChangeListener to be removed
*
* @see Action#removePropertyChangeListener
*/
public synchronized void removePropertyChangeListener(PropertyChangeListener listener) {
if (changeSupport == null) {
return;
}
changeSupport.removePropertyChangeListener(listener);
}
}