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387 lines
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387 lines
21 KiB
HTML
<div class="header">
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<div class="subTitle">
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javax.swing
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</div>
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<h2 class="title" title="Class LayoutFocusTraversalPolicy">Class LayoutFocusTraversalPolicy</h2>
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</div><div class="contentContainer">
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<ul class="inheritance">
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<li><a href="../../java/lang/Object.html" title="class in java.lang">java.lang.Object</a></li>
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<li>
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<ul class="inheritance">
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<li><a href="../../java/awt/FocusTraversalPolicy.html" title="class in java.awt">java.awt.FocusTraversalPolicy</a></li>
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<li>
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<ul class="inheritance">
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<li><a href="../../javax/swing/InternalFrameFocusTraversalPolicy.html" title="class in javax.swing">javax.swing.InternalFrameFocusTraversalPolicy</a></li>
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<li>
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<ul class="inheritance">
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<li><a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">javax.swing.SortingFocusTraversalPolicy</a></li>
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<li>
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<ul class="inheritance">
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<li>javax.swing.LayoutFocusTraversalPolicy</li>
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</ul> </li>
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</ul> </li>
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</ul> </li>
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</ul> </li>
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</ul>
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<div class="description">
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<ul class="blockList">
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<li class="blockList">
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<dl>
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<dt>
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All Implemented Interfaces:
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</dt>
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<dd>
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<span><a href="../../java/io/Serializable.html" title="java.io中的接口">Serializable</a></span>
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</dd>
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</dl>
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<hr/> <br/> <pre>public class <span class="typeNameLabel">LayoutFocusTraversalPolicy</span>
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extends <a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a>
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implements <a href="../../java/io/Serializable.html" title="interface in java.io">Serializable</a></pre>
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<div class="block">
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<span>一个SortingFocusTraversalPolicy，它根据大小，位置和方向对组件进行排序。</span>
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<span>基于它们的大小和位置，组件大致分为行和列。</span>
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<span>对于具有水平方向的容器，列从左到右或从右到左运行，行从上到下运行。</span>
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<span>对于具有垂直方向的容器，列从上到下运行，行从左到右或从右到左运行。</span>
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<span>见<code>ComponentOrientation</code>以获取更多信息。</span>
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<span>在继续下一行之前，一行中的所有列都将完全遍历。</span>
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</div>
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<dl>
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<dt>
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<span class="simpleTagLabel">从以下版本开始：</span>
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</dt>
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<dd>
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1.4
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</dd>
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<dt>
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<span class="seeLabel">另请参见：</span>
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</dt>
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<dd>
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<span><a href="../../java/awt/ComponentOrientation.html" title="java.awt中的类"><code>ComponentOrientation</code></a></span>
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</dd>
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</dl> </li>
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</ul>
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</div>
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<div class="summary">
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<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<ul class="blockList">
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<li class="blockList"><a name="constructor.summary">
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<!-- --> </a> <h3>构造方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Constructor Summary table, listing constructors, and an explanation">
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<caption>
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<span>构造方法</span>
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<span class="tabEnd"> </span>
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</caption>
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<tbody>
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<tr>
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<th class="colOne" scope="col">Constructor and Description</th>
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</tr>
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<tr class="altColor">
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<td class="colOne"><code><span class="memberNameLink"><a href="../../javax/swing/LayoutFocusTraversalPolicy.html#LayoutFocusTraversalPolicy--">LayoutFocusTraversalPolicy</a></span>()</code>
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<div class="block">
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构造一个LayoutFocusTraversalPolicy。
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</div> </td>
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</tr>
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</tbody>
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</table> </li>
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</ul>
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<!-- ========== METHOD SUMMARY =========== -->
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<li class="blockList"><a name="method.summary">
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<!-- --> </a> <h3>方法摘要</h3>
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<table border="0" cellpadding="3" cellspacing="0" class="memberSummary" summary="Method Summary table, listing methods, and an explanation">
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<caption>
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<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t2"><span><a href="javascript:show(2);">接口方法</a></span><span class="tabEnd"> </span></span>
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<span class="tableTab" id="t4"><span><a href="javascript:show(8);">具体的方法</a></span><span class="tabEnd"> </span></span>
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</caption>
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<tbody>
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<tr>
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<th class="colFirst" scope="col">Modifier and Type</th>
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<th class="colLast" scope="col">Method and Description</th>
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</tr>
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<tr class="altColor" id="i0">
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<td class="colFirst"><code>protected boolean</code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/LayoutFocusTraversalPolicy.html#accept-java.awt.Component-">accept</a></span>(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> aComponent)</code>
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<div class="block">
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确定指定的Component
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<code>Component</code>是新焦点所有者的可接受的选择。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i1">
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<td class="colFirst"><code><a href="../../java/awt/Component.html" title="class in java.awt">Component</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/LayoutFocusTraversalPolicy.html#getComponentAfter-java.awt.Container-java.awt.Component-">getComponentAfter</a></span>(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer, <a href="../../java/awt/Component.html" title="class in java.awt">Component</a> aComponent)</code>
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<div class="block">
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返回在aComponent之后应该接收焦点的Component。
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</div> </td>
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</tr>
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<tr class="altColor" id="i2">
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<td class="colFirst"><code><a href="../../java/awt/Component.html" title="class in java.awt">Component</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/LayoutFocusTraversalPolicy.html#getComponentBefore-java.awt.Container-java.awt.Component-">getComponentBefore</a></span>(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer, <a href="../../java/awt/Component.html" title="class in java.awt">Component</a> aComponent)</code>
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<div class="block">
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返回应该在aComponent之前接收焦点的Component。
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</div> </td>
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</tr>
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<tr class="rowColor" id="i3">
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<td class="colFirst"><code><a href="../../java/awt/Component.html" title="class in java.awt">Component</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/LayoutFocusTraversalPolicy.html#getFirstComponent-java.awt.Container-">getFirstComponent</a></span>(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer)</code>
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<div class="block">
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返回遍历周期中的第一个Component。
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</div> </td>
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</tr>
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<tr class="altColor" id="i4">
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<td class="colFirst"><code><a href="../../java/awt/Component.html" title="class in java.awt">Component</a></code></td>
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<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/LayoutFocusTraversalPolicy.html#getLastComponent-java.awt.Container-">getLastComponent</a></span>(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer)</code>
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<div class="block">
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返回遍历周期中的最后一个组件。
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</div> </td>
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</tr>
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</tbody>
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</table>
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<ul class="blockList">
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<li class="blockList"><a name="methods.inherited.from.class.javax.swing.SortingFocusTraversalPolicy">
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<!-- --> </a> <h3>Methods inherited from class javax.swing.<a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a></h3> <code><a href="../../javax/swing/SortingFocusTraversalPolicy.html#getComparator--">getComparator</a>, <a href="../../javax/swing/SortingFocusTraversalPolicy.html#getDefaultComponent-java.awt.Container-">getDefaultComponent</a>, <a href="../../javax/swing/SortingFocusTraversalPolicy.html#getImplicitDownCycleTraversal--">getImplicitDownCycleTraversal</a>, <a href="../../javax/swing/SortingFocusTraversalPolicy.html#setComparator-java.util.Comparator-">setComparator</a>, <a href="../../javax/swing/SortingFocusTraversalPolicy.html#setImplicitDownCycleTraversal-boolean-">setImplicitDownCycleTraversal</a></code></li>
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</ul>
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<ul class="blockList">
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<li class="blockList"><a name="methods.inherited.from.class.javax.swing.InternalFrameFocusTraversalPolicy">
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<!-- --> </a> <h3>Methods inherited from class javax.swing.<a href="../../javax/swing/InternalFrameFocusTraversalPolicy.html" title="class in javax.swing">InternalFrameFocusTraversalPolicy</a></h3> <code><a href="../../javax/swing/InternalFrameFocusTraversalPolicy.html#getInitialComponent-javax.swing.JInternalFrame-">getInitialComponent</a></code></li>
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</ul>
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<ul class="blockList">
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<li class="blockList"><a name="methods.inherited.from.class.java.awt.FocusTraversalPolicy">
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<!-- --> </a> <h3>Methods inherited from class java.awt.<a href="../../java/awt/FocusTraversalPolicy.html" title="class in java.awt">FocusTraversalPolicy</a></h3> <code><a href="../../java/awt/FocusTraversalPolicy.html#getInitialComponent-java.awt.Window-">getInitialComponent</a></code></li>
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</ul>
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<ul class="blockList">
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<li class="blockList"><a name="methods.inherited.from.class.java.lang.Object">
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<!-- --> </a> <h3>Methods inherited from class java.lang.<a href="../../java/lang/Object.html" title="class in java.lang">Object</a></h3> <code><a href="../../java/lang/Object.html#clone--">clone</a>, <a href="../../java/lang/Object.html#equals-java.lang.Object-">equals</a>, <a href="../../java/lang/Object.html#finalize--">finalize</a>, <a href="../../java/lang/Object.html#getClass--">getClass</a>, <a href="../../java/lang/Object.html#hashCode--">hashCode</a>, <a href="../../java/lang/Object.html#notify--">notify</a>, <a href="../../java/lang/Object.html#notifyAll--">notifyAll</a>, <a href="../../java/lang/Object.html#toString--">toString</a>, <a href="../../java/lang/Object.html#wait--">wait</a>, <a href="../../java/lang/Object.html#wait-long-">wait</a>, <a href="../../java/lang/Object.html#wait-long-int-">wait</a></code></li>
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</ul> </li>
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</ul> </li>
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</ul>
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</div>
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<div class="details">
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<ul class="blockList">
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<li class="blockList">
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<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<ul class="blockList">
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<li class="blockList"><a name="constructor.detail">
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<!-- --> </a> <h3>构造方法详细信息</h3> <a name="LayoutFocusTraversalPolicy--">
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<!-- --> </a>
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<ul class="blockListLast">
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<li class="blockList"> <h4>LayoutFocusTraversalPolicy</h4> <pre>public LayoutFocusTraversalPolicy()</pre>
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<div class="block">
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构造一个LayoutFocusTraversalPolicy。
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</div> </li>
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</ul> </li>
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</ul>
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<!-- ============ METHOD DETAIL ========== -->
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<ul class="blockList">
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<li class="blockList"><a name="method.detail">
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<!-- --> </a> <h3>方法详细信息</h3> <a name="getComponentAfter-java.awt.Container-java.awt.Component-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getComponentAfter</h4> <pre>public <a href="../../java/awt/Component.html" title="class in java.awt">Component</a> getComponentAfter(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer,
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<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> aComponent)</pre>
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<div class="block">
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<span>返回在aComponent之后应该接收焦点的Component。</span>
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<span>aContainer必须是aComponent的焦点循环根。</span>
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<p> <span>默认情况下，LayoutFocusTraversalPolicy隐式地转移焦点下循环。</span> <span>也就是说，在正常聚焦遍历期间，在聚焦周期根之后遍历的组件将是focus-cycle-root的默认组件对焦。</span> <span>可以使用<code>setImplicitDownCycleTraversal</code>方法禁用此行为。</span> </p>
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<p> <span>如果aContainer是<a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus traversal policy provider</a> ，焦点总是转移到周期。</span> </p>
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</div>
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<dl>
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<dt>
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<span class="overrideSpecifyLabel">重写：</span>
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</dt>
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<dd>
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html#getComponentAfter-java.awt.Container-java.awt.Component-">getComponentAfter</a></code>在
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a></code>
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</dd>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<code>aContainer</code> - aComponent或焦点遍历策略提供程序的焦点循环根
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</dd>
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<dd>
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<code>aComponent</code> -
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<code>aComponent</code>一个（可能是间接的）子，或者一个容器本身
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</dd>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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应该在aComponent之后接收焦点的组件，如果没有找到合适的组件，则为null
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果aContainer不是aComponent或焦点遍历策略提供程序的焦点循环根，或者aContainer或aComponent为null
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</dd>
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</dl> </li>
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</ul> <a name="getComponentBefore-java.awt.Container-java.awt.Component-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getComponentBefore</h4> <pre>public <a href="../../java/awt/Component.html" title="class in java.awt">Component</a> getComponentBefore(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer,
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<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> aComponent)</pre>
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<div class="block">
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<span>返回应该在aComponent之前接收焦点的Component。</span>
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<span>aContainer必须是aComponent的焦点循环根。</span>
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<p> <span>默认情况下，LayoutFocusTraversalPolicy隐式地转移焦点下循环。</span> <span>也就是说，在正常聚焦遍历期间，在聚焦周期根之后遍历的组件将是focus-cycle-root的默认组件对焦。</span> <span>可以使用<code>setImplicitDownCycleTraversal</code>方法禁用此行为。</span> </p>
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<p> <span>如果aContainer是<a href="../../java/awt/doc-files/FocusSpec.html#FocusTraversalPolicyProviders">focus traversal policy provider</a> ，焦点总是转移到周期。</span> </p>
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</div>
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<dl>
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<dt>
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<span class="overrideSpecifyLabel">重写：</span>
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</dt>
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<dd>
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html#getComponentBefore-java.awt.Container-java.awt.Component-">getComponentBefore</a></code>在
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a></code>
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</dd>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<code>aContainer</code> - aComponent或焦点遍历策略提供程序的焦点循环根
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</dd>
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<dd>
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<code>aComponent</code> -
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<code>aComponent</code>一个（可能是间接的）子，或者一个容器本身
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</dd>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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应该在aComponent之前收到焦点的组件，如果没有找到合适的组件，则为null
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果aContainer不是aComponent或焦点遍历策略提供程序的焦点循环根，或者aContainer或aComponent为null
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</dd>
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</dl> </li>
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</ul> <a name="getFirstComponent-java.awt.Container-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getFirstComponent</h4> <pre>public <a href="../../java/awt/Component.html" title="class in java.awt">Component</a> getFirstComponent(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer)</pre>
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<div class="block">
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<span>返回遍历周期中的第一个Component。</span>
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<span>该方法用于确定当向前方向遍历包装时要聚焦的下一个组件。</span>
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</div>
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<dl>
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<dt>
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<span class="overrideSpecifyLabel">重写：</span>
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</dt>
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<dd>
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html#getFirstComponent-java.awt.Container-">getFirstComponent</a></code>在
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a></code>
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</dd>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
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<dd>
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<code>aContainer</code> - 要返回其第一个组件的组件或焦点遍历策略提供程序的焦点循环根
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</dd>
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<dt>
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<span class="returnLabel">结果</span>
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</dt>
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<dd>
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aContainer遍历周期中的第一个组件，如果没有找到合适的组件，则返回null
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</dd>
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<dt>
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<span class="throwsLabel">异常</span>
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</dt>
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<dd>
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<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果aContainer为空
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</dd>
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</dl> </li>
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</ul> <a name="getLastComponent-java.awt.Container-">
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<!-- --> </a>
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<ul class="blockList">
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<li class="blockList"> <h4>getLastComponent</h4> <pre>public <a href="../../java/awt/Component.html" title="class in java.awt">Component</a> getLastComponent(<a href="../../java/awt/Container.html" title="class in java.awt">Container</a> aContainer)</pre>
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<div class="block">
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<span>返回遍历周期中的最后一个组件。</span>
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<span>该方法用于确定当相反方向遍历包装时要聚焦的下一个组件。</span>
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</div>
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<dl>
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<dt>
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<span class="overrideSpecifyLabel">重写：</span>
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</dt>
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<dd>
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html#getLastComponent-java.awt.Container-">getLastComponent</a></code>在
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<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a></code>
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</dd>
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<dt>
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<span class="paramLabel">参数</span>
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</dt>
|
||
<dd>
|
||
<code>aContainer</code> - 要返回其最后一个组件的组件或焦点遍历策略提供程序的焦点循环根
|
||
</dd>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
aContainer遍历周期中的最后一个组件，如果没有找到合适的组件，则返回null
|
||
</dd>
|
||
<dt>
|
||
<span class="throwsLabel">异常</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../java/lang/IllegalArgumentException.html" title="class in java.lang">IllegalArgumentException</a></code> - 如果aContainer为空
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> <a name="accept-java.awt.Component-">
|
||
<!-- --> </a>
|
||
<ul class="blockListLast">
|
||
<li class="blockList"> <h4>accept</h4> <pre>protected boolean accept(<a href="../../java/awt/Component.html" title="class in java.awt">Component</a> aComponent)</pre>
|
||
<div class="block">
|
||
<span>确定指定的Component <code>Component</code>是新的焦点所有者的可接受的选择。</span>
|
||
<span>该方法执行以下操作顺序：</span>
|
||
<ol>
|
||
<li> <span>检查<code>aComponent</code>是否可见，可显示，启用和可对焦。</span> <span>如果这些属性中的任何一个属性为<code>false</code> ，则此方法返回<code>false</code> 。</span> </li>
|
||
<li> <span>如果<code>aComponent</code>是一个实例<code>JTable</code> ，返回<code>true</code> 。</span> </li>
|
||
<li> <span>如果<code>aComponent</code>是一个实例<code>JComboBox</code> ，然后返回的值<code>aComponent.getUI().isFocusTraversable(aComponent)</code> 。</span> </li>
|
||
<li> <span>如果<code>aComponent</code>是<code>JComponent</code>与<code>JComponent.WHEN_FOCUSED</code> <code>InputMap</code>既不是<code>null</code>也不是空，返回<code>true</code> 。</span> </li>
|
||
<li> <span>返回值<code>DefaultFocusTraversalPolicy.accept(aComponent)</code> 。</span> </li>
|
||
</ol>
|
||
</div>
|
||
<dl>
|
||
<dt>
|
||
<span class="overrideSpecifyLabel">重写：</span>
|
||
</dt>
|
||
<dd>
|
||
<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html#accept-java.awt.Component-">accept</a></code>在
|
||
<code><a href="../../javax/swing/SortingFocusTraversalPolicy.html" title="class in javax.swing">SortingFocusTraversalPolicy</a></code>
|
||
</dd>
|
||
<dt>
|
||
<span class="paramLabel">参数</span>
|
||
</dt>
|
||
<dd>
|
||
<code>aComponent</code> -
|
||
<code>Component</code>作为焦点所有者的健身将被测试
|
||
</dd>
|
||
<dt>
|
||
<span class="returnLabel">结果</span>
|
||
</dt>
|
||
<dd>
|
||
<span><code>true</code>如果<code>aComponent</code>是焦点所有者的有效选择;</span>
|
||
<span>否则<code>false</code></span>
|
||
</dd>
|
||
<dt>
|
||
<span class="seeLabel">另请参见：</span>
|
||
</dt>
|
||
<dd>
|
||
<a href="../../java/awt/Component.html#isVisible--"><code>Component.isVisible()</code></a> ，
|
||
<a href="../../java/awt/Component.html#isDisplayable--"><code>Component.isDisplayable()</code></a> ，
|
||
<a href="../../java/awt/Component.html#isEnabled--"><code>Component.isEnabled()</code></a> ，
|
||
<a href="../../java/awt/Component.html#isFocusable--"><code>Component.isFocusable()</code></a> ，
|
||
<a href="../../javax/swing/plaf/ComboBoxUI.html#isFocusTraversable-javax.swing.JComboBox-"><code>ComboBoxUI.isFocusTraversable(javax.swing.JComboBox)</code></a> ，
|
||
<a href="../../javax/swing/JComponent.html#getInputMap-int-"><code>JComponent.getInputMap(int)</code></a> ，
|
||
<a href="../../java/awt/DefaultFocusTraversalPolicy.html#accept-java.awt.Component-"><code>DefaultFocusTraversalPolicy.accept(java.awt.Component)</code></a>
|
||
</dd>
|
||
</dl> </li>
|
||
</ul> </li>
|
||
</ul> </li>
|
||
</ul>
|
||
</div>
|
||
</div> |