windowlistener.html

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        System.out.println(msg);
    }

    String convertStateToString(int state) {
        if (state == Frame.NORMAL) {
            return "NORMAL";
        }
        if ((state & Frame.ICONIFIED) != 0) {
            return "ICONIFIED";
        }
        //MAXIMIZED_BOTH is a concatenation of two bits, so
        //we need to test for an exact match.
        if ((state & Frame.MAXIMIZED_BOTH) == Frame.MAXIMIZED_BOTH) {
            return "MAXIMIZED_BOTH";
        }
        if ((state & Frame.MAXIMIZED_VERT) != 0) {
            return "MAXIMIZED_VERT";
        }
        if ((state & Frame.MAXIMIZED_HORIZ) != 0) {
            return "MAXIMIZED_HORIZ";
        }
        return "UNKNOWN";
    }

    public static void main(String[] args) {
        ...
        //Create and set up the window.
        frame = new JFrame("WindowEventDemo");
        frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);
        ...
    }
}
</pre></blockquote>

</blockquote>
<h3>
<a name="api">The Window Listener API</a>
</h3>
<blockquote>

The following tables list the methods in the three window
listener interfaces and the methods in the <code>WindowEvent</code>
class.  The methods from all three interfaces
are available through the

<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowAdapter.html"><code>WindowAdapter</code></a> class. The window listener API falls into four categories:

<ul>
<li><a href="#windowlistener">The WindowListener Interface</a>
<li><a href="#windowfocuslistener">The WindowFocusListener Interface</a>
<li><a href="#windowstatelistener">The WindowStateListener Interface</a>
<li><a href="#windowevent">The WindowEvent Class</a>
</ul>

<p align=center><a name="windowlistener">The WindowListener
   Interface</a>
<p>
<table border=1>
<tr>
<th align=left>Method</th>
<th align=left>Purpose</th>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowOpened(java.awt.event.WindowEvent)">windowOpened(WindowEvent)</a></td>
<td> Called just after the listened-to window has been
     shown for the first time.
</td>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowClosing(java.awt.event.WindowEvent)">windowClosing(WindowEvent)</a></td>
<td> Called in response to a user request that the listened-to
     window be closed.  To actually close the window, 
     the listener should invoke the window's <code>dispose</code> or 
     <code>setVisible(false)</code> method.
</td>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowClosed(java.awt.event.WindowEvent)">windowClosed(WindowEvent)</a></td>
<td> Called just after the listened-to window has closed.
</td>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowIconified(java.awt.event.WindowEvent)">windowIconified(WindowEvent)</a><br>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowDeiconified(java.awt.event.WindowEvent)">windowDeiconified(WindowEvent)</a></td>
<td> Called just after the listened-to window is
     iconified or deiconified, respectively.
</td>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowActivated(java.awt.event.WindowEvent)">windowActivated(WindowEvent)</a><br>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowDeactivated(java.awt.event.WindowEvent)">windowDeactivated(WindowEvent)</a></td>
<td> Called just after the listened-to window
     is activated or deactivated, respectively. These methods
     are not sent to windows that are not frames or dialogs.
     For this reason, we prefer the 1.4 <code>windowGainedFocus</code>
     and <code>windowLostFocus</code> methods to determine when a window
     gains or loses the focus.
</td>
</tr>

</table>

<p align=center><a name="windowfocuslistener">The WindowFocusListener
   Interface</a>
<p><em>This interface was introduced in release 1.4.</em>
<table border=1>
<tr>
<th align=left>Method</th>
<th align=left>Purpose</th>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowGainedFocus(java.awt.event.WindowEvent)">windowGainedFocus(WindowEvent)</a><br>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowLostFocus(java.awt.event.WindowEvent)">windowLostFocus(WindowEvent)</a></td>
<td> Called just after the listened-to window gains or
     loses the focus, respectively.
</td>
</tr>

</table>

<p align=center><a name="windowstatelistener">The WindowStateListener
   Interface</a>
<p><em>This interface was introduced in release 1.4.</em>
<table border=1>
<tr>
<th align=left>Method</th>
<th align=left>Purpose</th>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowListener.html#windowStateChanged(java.awt.event.WindowEvent)">windowStateChanged(WindowEvent)</a></td>
<td> Called just after the listened-to window's state
     is changed by being iconified, deiconified, maximized, or
     returned to normal. The state is available through
     the <code>WindowEvent</code> as a bitwise mask.
     The possible values, defined in <code>java.awt.Frame</code>, are:
<ul>
<li>NORMAL.  Indicates that no state bits are set.
<li>ICONIFIED
<li>MAXIMIZED_HORIZ
<li>MAXIMIZED_VERT
<li>MAXIMIZED_BOTH.  Concatenates <code>MAXIMIZED_HORIZ</code> and
    <code>MAXIMIZED_VERT</code>.  A window manager may support
    <code>MAXIMIZED_BOTH</code>, while not supporting
    <code>MAXIMIZED_HORIZ</code> or <code>MAXIMIZED_VERT</code>.
    The
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/Toolkit.html"><code>java.awt.Toolkit</code></a> method
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/Toolkit.html#isFrameStateSupported(int)"><code>isFrameStateSupported(int)</code></a> can be used to determine what states are supported by the window manager.
</ul>
</td>
</tr>

</table>

<p align=center><a name="windowevent">The WindowEvent
   Class</a>
<table border=1>
<tr>
<th align=left>Method</th>
<th align=left>Purpose</th>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowEvent.html#getWindow()">Window getWindow()</a></td>
<td> Returns the window that fired the event. You can use this
     instead of the <code>getSource</code> method.
</td>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowEvent.html#getOppositeWindow()">Window getOppositeWindow()</a></td>
<td>Returns the other window involved in this focus or
    activation change.  For a <code>WINDOW_ACTIVATED</code>
    or <code>WINDOW_GAINED_FOCUS</code> event, this returns the
    window that lost activation or the focus.  For a 
    <code>WINDOW_DEACTIVATED</code> or <code>WINDOW_LOST_FOCUS</code>
    event, this returns the window that gained activation or the focus.
    For any other type of <code>WindowEvent</code> with a Java
    application in a different VM or context, or with no other window,
    <code>null</code> is returned.  This method was introduced
    in release 1.4.
</td>
</tr>

<tr>
<td>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowEvent.html#getOldState()">int getOldState()</a><br>
<a class="APILink" target="_blank" href="http://java.sun.com/javase/6/docs/api/java/awt/event/WindowEvent.html#getNewState()">int getNewState()</a></td>
<td>For <code>WINDOW_STATE_CHANGED</code> events these methods
    return the previous or new state of the window as a bitwise mask.
    These methods were introduced in release 1.4.
</td>
</tr>

</table>
</blockquote>

<a name="eg">
<h3>Examples that Use Window Listeners</h3>
</a>
<blockquote>
The following table lists the
examples that use window listeners.
 
<p>
 
<table>
<tr valign=top>
<th align=left> Example
</th>
<th align=left> Where Described
</th>
<th align=left> Notes

</th>
</tr>
<tr valign=top>
<td> <a href="examples/index.html#WindowEventDemo"><code>WindowEventDemo</code></a>
</td>
<td> This section
</td>
<td> Reports all window events that occur on one window
     to demonstrate the circumstances
     under which window events are fired.

</td>
</tr>

<tr valign=top>
<td> <a href="../components/examples/index.html#SliderDemo">
     <code>SliderDemo</code></a>
</td>
<td>
<a class="TutorialLink" target="_top" href="../components/slider.html">How to Use Sliders</a></td>
<td> Listens for window iconify and deiconify events,
     so that it can stop the animation when the window isn't visible.
</td>
</tr>
<tr valign=top>
<td> <a href="examples/index.html#InternalFrameEventDemo"><code>InternalFrameEventDemo</code></a>
</td>
<td> <a href="internalframelistener.html">
     How to Write an Internal Frame Listener</a>
</td>
<td> Reports all internal frame events that occur on one internal frame
     to demonstrate the circumstances
     under which internal frame events are fired.
     Internal frame events are similar to window events.

</td>
</tr valign=top>

<tr valign=top>
<td> <a href="../components/examples/index.html#DialogDemo">
     <code>DialogDemo</code></a>
</td>
<td>
<a class="TutorialLink" target="_top" href="../components/generaltext.html">Text Component Features</a></td>
<td>
<a class="SourceLink" target="_blank" href="../components/examples/CustomDialog.java"><code>CustomDialog.java</code></a>     uses <code>setDefaultCloseOperation</code> instead
     of a window listener to determine what action to take
     when the user closes the window.
</td>
</tr>

<tr valign=top>
<td> <a href="../components/examples/index.html#Framework">
     <code>Framework</code></a> 
</td>
<td>
&#151;
</td>
<td> A demo that allows multiple windows to be created
     and destroyed.
</td>
</tr>
</table>


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