http://www.jexp.ru/index.php?action=history&feed=atom&title=Java_by_API%2Fjavax.swing.text%2FDefaultCaret 2026-04-27T16:00:38Z История изменений этой страницы в вики MediaWiki 1.30.0 http://www.jexp.ru/index.php?title=Java_by_API/javax.swing.text/DefaultCaret&diff=217&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.text/DefaultCaret&diff=218&oldid=prev 2010-05-31T14:12:12Z

<p>1 версия</p> <p><b>Новая страница</b></p><div>== extends DefaultCaret ==<br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> &lt;!-- start source code --&gt;<br /> <br /> &lt;source lang=&quot;java&quot;&gt;<br /> import java.awt.BorderLayout;<br /> import java.awt.Graphics;<br /> import java.awt.Rectangle;<br /> import javax.swing.JFrame;<br /> import javax.swing.JScrollPane;<br /> import javax.swing.JTextArea;<br /> import javax.swing.text.BadLocationException;<br /> import javax.swing.text.DefaultCaret;<br /> import javax.swing.text.JTextComponent;<br /> public class FancyCaret extends DefaultCaret {<br /> protected synchronized void damage(Rectangle r) {<br /> if (r == null)<br /> return;<br /> x = r.x;<br /> y = r.y;<br /> height = r.height;<br /> if (width &lt;= 0)<br /> width = getComponent().getWidth();<br /> repaint();<br /> }<br /> public void paint(Graphics g) {<br /> JTextComponent comp = getComponent();<br /> if (comp == null)<br /> return;<br /> int dot = getDot();<br /> Rectangle r = null;<br /> char dotChar;<br /> try {<br /> r = comp.modelToView(dot);<br /> if (r == null)<br /> return;<br /> dotChar = comp.getText(dot, 1).charAt(0);<br /> } catch (BadLocationException e) {<br /> return;<br /> }<br /> if ((x != r.x) || (y != r.y)) {<br /> repaint();<br /> x = r.x;<br /> y = r.y;<br /> height = r.height;<br /> }<br /> g.setColor(comp.getCaretColor());<br /> g.setXORMode(comp.getBackground());<br /> if (dotChar == &quot;\n&quot;) {<br /> int diam = r.height;<br /> if (isVisible())<br /> g.fillArc(r.x - diam / 2, r.y, diam, diam, 270, 180); // half circle<br /> width = diam / 2 + 2;<br /> return;<br /> }<br /> if (dotChar == &quot;\t&quot;)<br /> try {<br /> Rectangle nextr = comp.modelToView(dot + 1);<br /> if ((r.y == nextr.y) &amp;&amp; (r.x &lt; nextr.x)) {<br /> width = nextr.x - r.x;<br /> if (isVisible())<br /> g.fillRoundRect(r.x, r.y, width, r.height, 12, 12);<br /> return;<br /> } else<br /> dotChar = &quot; &quot;;<br /> } catch (BadLocationException e) {<br /> dotChar = &quot; &quot;;<br /> }<br /> width = g.getFontMetrics().charWidth(dotChar);<br /> if (isVisible())<br /> g.fillRect(r.x, r.y, width, r.height);<br /> }<br /> public static void main(String args[]) {<br /> JFrame frame = new JFrame(&quot;FancyCaret demo&quot;);<br /> frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);<br /> JTextArea area = new JTextArea(8, 32);<br /> area.setCaret(new FancyCaret());<br /> area.setText(&quot;VI\tVirgin Islands \nVA Virginia\nVT\tVermont&quot;);<br /> frame.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);<br /> frame.pack();<br /> frame.setVisible(true);<br /> }<br /> }<br /> <br /> &lt;/source&gt;<br /> <br /> <br /> &lt;!-- end source code --&gt;</div>

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