import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.regex.*;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.plaf.metal.MetalScrollBarUI;
public class ScrollBarSearchHighlighterTest {
private static final Highlighter.HighlightPainter highlightPainter
= new DefaultHighlighter.DefaultHighlightPainter(Color.YELLOW);
private static final String pattern = "Swing";
private static final String initTxt =
"Trail: Creating a GUI with JFC/Swing\n" +
"Lesson: Learning Swing by Example\n" +
"This lesson explains the concepts you need to\n" +
" use Swing components in building a user interface.\n" +
" First we examine the simplest Swing application you can write.\n" +
" Then we present several progressively complicated examples of creating\n" +
" user interfaces using components in the javax.swing package.\n" +
" We cover several Swing components, such as buttons, labels, and text areas.\n" +
" The handling of events is also discussed,\n" +
" as are layout management and accessibility.\n" +
" This lesson ends with a set of questions and exercises\n" +
" so you can test yourself on what you've learned.\n" +
"http://docs.oracle.com/javase/tutorial/uiswing/learn/index.html\n";
private final JTextArea textArea = new JTextArea();
private final JScrollPane scroll = new JScrollPane(textArea);
private final JScrollBar scrollbar = new JScrollBar(JScrollBar.VERTICAL);
public JComponent makeUI() {
textArea.setEditable(false);
textArea.setLineWrap(true);
textArea.setText(initTxt+initTxt+initTxt);
scrollbar.setUnitIncrement(10);
scrollbar.setUI(new MetalScrollBarUI() {
@Override protected void paintTrack(
Graphics g, JComponent c, Rectangle trackBounds) {
super.paintTrack(g, c, trackBounds);
Rectangle rect = textArea.getBounds();
double sy = trackBounds.getHeight() / rect.getHeight();
AffineTransform at = AffineTransform.getScaleInstance(1.0, sy);
Highlighter highlighter = textArea.getHighlighter();
g.setColor(Color.YELLOW);
try{
for(Highlighter.Highlight hh: highlighter.getHighlights()) {
Rectangle r = textArea.modelToView(hh.getStartOffset());
Rectangle s = at.createTransformedShape(r).getBounds();
int h = 2; //Math.max(2, s.height-2);
g.fillRect(trackBounds.x+2, trackBounds.y+1+s.y, trackBounds.width, h);
}
} catch(BadLocationException e) {
e.printStackTrace();
}
}
});
scroll.setVerticalScrollBar(scrollbar);
Box box = Box.createHorizontalBox();
box.add(Box.createHorizontalGlue());
box.add(new JButton(new AbstractAction("highlight") {
@Override public void actionPerformed(ActionEvent e) {
setHighlight(textArea, pattern);
}
}));
box.add(Box.createHorizontalStrut(2));
box.add(new JButton(new AbstractAction("clear") {
@Override public void actionPerformed(ActionEvent e) {
textArea.getHighlighter().removeAllHighlights();
scrollbar.repaint();
}
}));
JPanel p = new JPanel(new BorderLayout());
p.add(scroll);
p.add(box, BorderLayout.SOUTH);
return p;
}
public void setHighlight(JTextComponent jtc, String pattern) {
Highlighter highlighter = jtc.getHighlighter();
highlighter.removeAllHighlights();
Document doc = jtc.getDocument();
try{
String text = doc.getText(0, doc.getLength());
Matcher matcher = Pattern.compile(pattern).matcher(text);
int pos = 0;
while(matcher.find(pos)) {
int start = matcher.start();
int end = matcher.end();
highlighter.addHighlight(start, end, highlightPainter);
pos = end;
}
}catch(BadLocationException e) {
e.printStackTrace();
}
scroll.repaint();
}
public void removeHighlights(JTextComponent jtc) {
Highlighter hilite = jtc.getHighlighter();
Highlighter.Highlight[] hilites = hilite.getHighlights();
for(int i=0; i<hilites.length; i++) {
if(hilites[i].getPainter() instanceof
DefaultHighlighter.DefaultHighlightPainter) {
hilite.removeHighlight(hilites[i]);
}
}
scroll.repaint();
}
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
@Override public void run() {
createAndShowGUI();
}
});
}
public static void createAndShowGUI() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.getContentPane().add(new ScrollBarSearchHighlighterTest().makeUI());
frame.setSize(320, 240);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
}
または別のオプションは、「MatteBorder + Icon + RowHeader」を使用することです: JScrollBar 検索ハイライター