http://www.jexp.ru/index.php?action=history&feed=atom&title=Java_by_API%2Fjavax.swing%2FListCellRenderer 2026-04-19T14:44:35Z История изменений этой страницы в вики MediaWiki 1.30.0 http://www.jexp.ru/index.php?title=Java_by_API/javax.swing/ListCellRenderer&diff=734&oldid=prev 2010-05-31T17:43:48Z

<p></p> <table class="diff diff-contentalign-left" data-mw="interface"> <tr style="vertical-align: top;" lang="ru"> <td colspan="1" style="background-color: white; color:black; text-align: center;">← Предыдущая</td> <td colspan="1" style="background-color: white; color:black; text-align: center;">Версия 17:43, 31 мая 2010</td> </tr><tr><td colspan="2" style="text-align: center;" lang="ru"><div class="mw-diff-empty">(нет различий)</div> </td></tr></table>

http://www.jexp.ru/index.php?title=Java_by_API/javax.swing/ListCellRenderer&diff=735&oldid=prev 2010-05-31T14:20:10Z

<p>1 версия</p> <p><b>Новая страница</b></p><div>== implements ListCellRenderer ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> <br /> import java.awt.BorderLayout;<br /> import java.awt.Color;<br /> import java.awt.ruponent;<br /> import java.awt.Dimension;<br /> import java.awt.event.ActionEvent;<br /> import java.awt.event.ActionListener;<br /> import javax.swing.DefaultListCellRenderer;<br /> import javax.swing.JComboBox;<br /> import javax.swing.JFrame;<br /> import javax.swing.JLabel;<br /> import javax.swing.JList;<br /> import javax.swing.ListCellRenderer;<br /> public class MainClass {<br /> public static void main(String args[]) throws Exception {<br /> Color colors[] = { Color.GREEN, Color.ORANGE, Color.PINK, Color.RED,<br /> Color.WHITE, Color.YELLOW };<br /> JFrame frame = new JFrame(&quot;Color JComboBox&quot;);<br /> frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<br /> final JComboBox comboBox = new JComboBox(colors);<br /> comboBox.setMaximumRowCount(5);<br /> comboBox.setEditable(true);<br /> comboBox.setRenderer(new ColorCellRenderer());<br /> frame.add(comboBox, BorderLayout.NORTH);<br /> final JLabel label = new JLabel();<br /> label.setOpaque(true);<br /> label.setBackground((Color) comboBox.getSelectedItem());<br /> frame.add(label, BorderLayout.CENTER);<br /> ActionListener actionListener = new ActionListener() {<br /> public void actionPerformed(ActionEvent actionEvent) {<br /> Color selectedColor = (Color) comboBox.getSelectedItem();<br /> label.setBackground(selectedColor);<br /> }<br /> };<br /> comboBox.addActionListener(actionListener);<br /> frame.setSize(300, 200);<br /> frame.setVisible(true);<br /> }<br /> }<br /> class ColorCellRenderer implements ListCellRenderer {<br /> protected DefaultListCellRenderer defaultRenderer = new DefaultListCellRenderer();<br /> private final static Dimension preferredSize = new Dimension(0, 20);<br /> public Component getListCellRendererComponent(JList list, Object value, int index,<br /> boolean isSelected, boolean cellHasFocus) {<br /> JLabel renderer = (JLabel) defaultRenderer.getListCellRendererComponent(list, value, index,<br /> isSelected, cellHasFocus);<br /> if (value instanceof Color) {<br /> renderer.setBackground((Color) value);<br /> }<br /> renderer.setPreferredSize(preferredSize);<br /> return renderer;<br /> }<br /> }<br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>

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