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118 lines
3.0 KiB
118 lines
3.0 KiB
/*
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* Copyright (c) 1996, 2013, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*
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*/
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package java.awt.event;
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/**
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* An abstract adapter class for receiving window events.
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* The methods in this class are empty. This class exists as
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* convenience for creating listener objects.
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* <P>
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* Extend this class to create a <code>WindowEvent</code> listener
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* and override the methods for the events of interest. (If you implement the
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* <code>WindowListener</code> interface, you have to define all of
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* the methods in it. This abstract class defines null methods for them
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* all, so you can only have to define methods for events you care about.)
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* <P>
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* Create a listener object using the extended class and then register it with
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* a Window using the window's <code>addWindowListener</code>
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* method. When the window's status changes by virtue of being opened,
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* closed, activated or deactivated, iconified or deiconified,
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* the relevant method in the listener
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* object is invoked, and the <code>WindowEvent</code> is passed to it.
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*
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* @see WindowEvent
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* @see WindowListener
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* @see <a href="https://docs.oracle.com/javase/tutorial/uiswing/events/windowlistener.html">Tutorial: Writing a Window Listener</a>
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*
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* @author Carl Quinn
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* @author Amy Fowler
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* @author David Mendenhall
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* @since 1.1
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*/
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public abstract class WindowAdapter
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implements WindowListener, WindowStateListener, WindowFocusListener
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{
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/**
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* Invoked when a window has been opened.
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*/
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public void windowOpened(WindowEvent e) {}
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/**
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* Invoked when a window is in the process of being closed.
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* The close operation can be overridden at this point.
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*/
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public void windowClosing(WindowEvent e) {}
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/**
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* Invoked when a window has been closed.
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*/
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public void windowClosed(WindowEvent e) {}
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/**
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* Invoked when a window is iconified.
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*/
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public void windowIconified(WindowEvent e) {}
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/**
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* Invoked when a window is de-iconified.
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*/
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public void windowDeiconified(WindowEvent e) {}
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/**
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* Invoked when a window is activated.
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*/
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public void windowActivated(WindowEvent e) {}
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/**
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* Invoked when a window is de-activated.
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*/
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public void windowDeactivated(WindowEvent e) {}
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/**
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* Invoked when a window state is changed.
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* @since 1.4
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*/
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public void windowStateChanged(WindowEvent e) {}
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/**
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* Invoked when the Window is set to be the focused Window, which means
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* that the Window, or one of its subcomponents, will receive keyboard
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* events.
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*
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* @since 1.4
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*/
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public void windowGainedFocus(WindowEvent e) {}
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/**
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* Invoked when the Window is no longer the focused Window, which means
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* that keyboard events will no longer be delivered to the Window or any of
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* its subcomponents.
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*
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* @since 1.4
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*/
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public void windowLostFocus(WindowEvent e) {}
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}
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