uTools-Manuals/docs/java/javax/swing/ListCellRenderer.html

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     javax.swing 
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<h2 class="title" title="Interface ListCellRenderer">Interface ListCellRenderer&lt;E&gt;</h2>
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<span class="paramLabel">参数类型</span>
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<code>E</code> - 可以使用此渲染器的值的类型 
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        所有已知实现类：
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<span><a href="../../javax/swing/plaf/basic/BasicComboBoxRenderer.html" title="javax.swing.plaf.basic中的类">BasicComboBoxRenderer</a> ， <a href="../../javax/swing/plaf/basic/BasicComboBoxRenderer.UIResource.html" title="javax.swing.plaf.basic中的类">BasicComboBoxRenderer.UIResource</a> ， <a href="../../javax/swing/DefaultListCellRenderer.html" title="javax.swing中的类">DefaultListCellRenderer</a> ， <a href="../../javax/swing/DefaultListCellRenderer.UIResource.html" title="javax.swing中的类">DefaultListCellRenderer.UIResource</a> ， <a href="../../javax/swing/plaf/metal/MetalFileChooserUI.FileRenderer.html" title="javax.swing.plaf.metal中的类">MetalFileChooserUI.FileRenderer</a> ， <a href="../../javax/swing/plaf/metal/MetalFileChooserUI.FilterComboBoxRenderer.html" title="javax.swing.plaf.metal中的类">MetalFileChooserUI.FilterComboBoxRenderer</a></span>
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<hr/> <br/> <pre>public interface <span class="typeNameLabel">ListCellRenderer&lt;E&gt;</span></pre>
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<span>识别可以用作“橡皮图章”来绘制JList中的单元格的组件。</span>
<span>例如，使用一个JLabel作为ListCellRenderer，你会写是这样的：</span>
<pre>  <span><code> class MyCellRenderer extends JLabel implements ListCellRenderer&lt;Object&gt; { public MyCellRenderer() { setOpaque(true); } public Component getListCellRendererComponent(JList&lt;?&gt; list, Object value, int index, boolean isSelected, boolean cellHasFocus) { setText(value.toString()); Color background; Color foreground; // check if this cell represents the current DnD drop location JList.DropLocation dropLocation = list.getDropLocation(); if (dropLocation != null &amp;&amp; !dropLocation.isInsert() &amp;&amp; dropLocation.getIndex() == index) { background = Color.BLUE; foreground = Color.WHITE; // check if this cell is selected } else if (isSelected) { background = Color.RED; foreground = Color.WHITE; // unselected, and not the DnD drop location } else { background = Color.WHITE; foreground = Color.BLACK; }; setBackground(background); setForeground(foreground); return this; } } </code></span> </pre>
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<span class="seeLabel">另请参见：</span>
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<span><a href="../../javax/swing/JList.html" title="javax.swing中的类"><code>JList</code></a> ， <a href="../../javax/swing/DefaultListCellRenderer.html" title="javax.swing中的类"><code>DefaultListCellRenderer</code></a></span>
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<span class="activeTableTab" id="t0"><span>所有方法</span><span class="tabEnd"> </span></span>
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<td class="colFirst"><code><a href="../../java/awt/Component.html" title="class in java.awt">Component</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../javax/swing/ListCellRenderer.html#getListCellRendererComponent-javax.swing.JList-E-int-boolean-boolean-">getListCellRendererComponent</a></span>(<a href="../../javax/swing/JList.html" title="class in javax.swing">JList</a>&lt;? extends <a href="../../javax/swing/ListCellRenderer.html" title="type parameter in ListCellRenderer">E</a>&gt; list, <a href="../../javax/swing/ListCellRenderer.html" title="type parameter in ListCellRenderer">E</a> value, int index, boolean isSelected, boolean cellHasFocus)</code>
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              返回已配置为显示指定值的组件。 
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<li class="blockList"> <h4>getListCellRendererComponent</h4> <pre><a href="../../java/awt/Component.html" title="class in java.awt">Component</a> getListCellRendererComponent(<a href="../../javax/swing/JList.html" title="class in javax.swing">JList</a>&lt;? extends <a href="../../javax/swing/ListCellRenderer.html" title="type parameter in ListCellRenderer">E</a>&gt; list,
                                       <a href="../../javax/swing/ListCellRenderer.html" title="type parameter in ListCellRenderer">E</a> value,
                                       int index,
                                       boolean isSelected,
                                       boolean cellHasFocus)</pre>
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<span>返回已配置为显示指定值的组件。</span>
<span>然后调用该组件的<code>paint</code>方法“渲染”单元。</span>
<span>如果由于列表单元格不具有固定大小而需要计算列表的维度，则调用此方法来生成可调用<code>getPreferredSize</code> 。</span>
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<span class="paramLabel">参数</span>
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<code>list</code> - 我们正在画的JList。 
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<code>value</code> - 由list.getModel（）返回的值getElementAt（index）。 
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<code>index</code> - 细胞索引。 
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<code>isSelected</code> - 如果指定的单元格被选中，则为真。 
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<code>cellHasFocus</code> - 如果指定的单元格具有焦点，则为真。 
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<span class="returnLabel">结果</span>
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             其paint（）方法将呈现指定值的组件。 
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<span class="seeLabel">另请参见：</span>
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<a href="../../javax/swing/JList.html" title="class in javax.swing"><code>JList</code></a>, 
            <a href="../../javax/swing/ListSelectionModel.html" title="interface in javax.swing"><code>ListSelectionModel</code></a>, 
            <a href="../../javax/swing/ListModel.html" title="interface in javax.swing"><code>ListModel</code></a>
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