dispatchkey.html

来自「java类库详细讲解」· HTML 代码 · 共 160 行

HTML
160 行
字号 
<HTML>
<HEAD>
<META http-equiv="Content-Type" content="text/html; charset=UTF-8">
<TITLE>Listening to All Key Events Before Delivery to Focused Component
(Java Developers Almanac Example)
</TITLE>
<META CONTENT="Patrick Chan" NAME="AUTHOR">
<META CONTENT="Code Examples from The Java Developers Almanac 1.4" NAME="DESCRIPTION">
<META CONTENT="Addison-Wesley/Patrick Chan" NAME="OWNER">
<META CONTENT="3/20/02" NAME="revision">
<STYLE TYPE="text/css">
<!--     BODY CODE  {font-family: Courier, Monospace;           font-size: 11pt}    TABLE, BODY          {font-family: Verdana, Arial, Helvetica, sans-serif;           font-size: 10pt}    PRE   {font-family: Courier, Monospace;           font-size: 10pt}    H3    {font-family: Verdana, Arial, Helvetica, sans-serif;           font-size: 11pt}    A.eglink {text-decoration: none}    A:hover.eglink {text-decoration: underline}    -->
</STYLE>
</HEAD>
<BODY>
<TABLE CELLSPACING="0" CELLPADDING="0" BORDER="0">
<TR>
<TD rowspan="3"><A HREF="/?l=ex"><IMG BORDER="0" ALIGN="BOTTOM" HSPACE="10" SRC="/egs/almanac14a.jpg"></A></TD><TD VALIGN="top"><font face="Times" size="6"><b>The Java Developers Almanac 1.4</b></font>
<br>
        Order this book from <a href="/cgi-bin/scripts/redirect.pl?l=ex&url=http://www.amazon.com/exec/obidos/ASIN/0201752808/xeo">Amazon</a>.
    </TD>
</TR>
<TR>
<TD align="right" valign="bottom">
<FORM method="get" action="/cgi-bin/search/find.pl">
<INPUT size="25" name="words" type="text"><INPUT value="Search" type="submit">
</FORM>
</TD>
</TR>
</TABLE>
<HR color="#6666cc">
<DIV ALIGN="LEFT">
<A HREF="/">Home</A>
    &gt;
    <A HREF="../index.html">List of Packages</A>
    &gt;
    <B><A HREF="../java.awt/pkg.html">java.awt</A></B><font color="#666666" SIZE="-2">
        &nbsp;[77 examples]
        </font>
        &gt;
        <B><A HREF="../java.awt/pkg.html#Events">Events</A></B><font color="#666666" SIZE="-2">
            &nbsp;[1 examples]
            </font>
</DIV><P>
  <h3>
    e640.  
    Listening to All Key Events Before Delivery to Focused Component</h3>

Registering a key event dispatcher with the keyboard focus manager
allows you to see all key events before they are sent to the
focused component. It is possible to modify the event
or even prevent the event from being delivered.


<pre>
    KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(
        new KeyEventDispatcher() {
            public boolean dispatchKeyEvent(KeyEvent e) {
                // This example converts all typed keys to upper case
                if (e.getID() == KeyEvent.KEY_TYPED) {
                    e.setKeyChar(Character.toUpperCase(e.getKeyChar()));
                }
    
                // If the key should not be dispatched to the
                // focused component, set discardEvent to true
                boolean discardEvent = false;
                return discardEvent;
            }
        });
</pre>
<P><table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td bgcolor="#6666cc" align="center"><font color="#ffffff">
            &nbsp;Related Examples
        </font></td>
</tr>
</table>

<table width="600" CELLSPACING="0" CELLPADDING="2" BORDER="0">
<tr>
<td align="left">
<br>
        See also: 
<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Colors">
    Colors
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Components">
    Components
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Containers">
    Containers
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Cursors">
    Cursors
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Drawing">
    Drawing
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Focus">
    Focus
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Frames">
    Frames
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#GridBagLayout">
    GridBagLayout
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Images">
    Images
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Shapes">
    Shapes
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Simulating%20Events">
    Simulating Events
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#Text">
    Text
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/java.awt/pkg.html?l=rel#The%20Screen">
    The Screen
</a>&nbsp;&nbsp;

</td>
</tr>
</table>

<br>

<br>
<FONT FACE="Verdana, Arial, Helvetica, sans-serif" SIZE="0">
&copy; 2002 Addison-Wesley.
</FONT>
</BODY>
</HTML>

dispatchkey.html - 源码说明

本页面展示了「java类库详细讲解」中的 dispatchkey.html 源码文件，采用 HTML 编程语言编写，共 160 行代码。您可以在线阅读完整代码内容，也可以返回资源详情页下载完整源码包进行本地学习和开发。

虫虫下载站收录了大量与java相关的技术资源，包括源代码、技术文档、电路图等，是电子工程师和嵌入式开发者的专业学习平台。

⌨️ 快捷键说明

复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?