в 17:43, 31 мая 2010

2010-05-31T17:43:48Z

Admin: 1 версия

2010-05-31T14:12:19Z

1 версия

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== Highlighter: addHighlight(int p0, int p1, HighlightPainter p) ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
public class MultiHighlight implements ActionListener {
private JTextComponent comp;
private String charsToHighlight;
public MultiHighlight(JTextComponent c, String chars) {
comp = c;
charsToHighlight = chars;
}
public void actionPerformed(ActionEvent e) {
Highlighter h = comp.getHighlighter();
h.removeAllHighlights();
String text = comp.getText().toUpperCase();
for (int j = 0; j < text.length(); j += 1) {
char ch = text.charAt(j);
if (charsToHighlight.indexOf(ch) >= 0)
try {
h.addHighlight(j, j + 1, DefaultHighlighter.DefaultPainter);
} catch (BadLocationException ble) {
}
}
}
public static void main(String args[]) {
JFrame frame = new JFrame("MultiHighlight");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTextArea area = new JTextArea(5, 20);
area.setText("ww\nw.jexp.c\nom");
frame.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
JButton b = new JButton("Highlight All Vowels");
b.addActionListener(new MultiHighlight(area, "aeiouAEIOU"));
frame.getContentPane().add(b, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}

</source>



== Highlighter: getHighlights() ==



<source lang="java">

import javax.swing.JTextArea;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
public class Main {
public static void main(String[] argv) throws Exception {
JTextArea textComp = new JTextArea();
removeHighlights(textComp);
}
public static void removeHighlights(JTextComponent textComp) {
Highlighter hilite = textComp.getHighlighter();
Highlighter.Highlight[] hilites = hilite.getHighlights();
for (int i = 0; i < hilites.length; i++) {
hilite.removeHighlight(hilites[i]);
}
}
}

</source>



== Highlighter: removeAllHighlights() ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
public class MultiHighlight implements ActionListener {
private JTextComponent comp;
private String charsToHighlight;
public MultiHighlight(JTextComponent c, String chars) {
comp = c;
charsToHighlight = chars;
}
public void actionPerformed(ActionEvent e) {
Highlighter h = comp.getHighlighter();
h.removeAllHighlights();
String text = comp.getText().toUpperCase();
for (int j = 0; j < text.length(); j += 1) {
char ch = text.charAt(j);
if (charsToHighlight.indexOf(ch) >= 0)
try {
h.addHighlight(j, j + 1, DefaultHighlighter.DefaultPainter);
} catch (BadLocationException ble) {
}
}
}
public static void main(String args[]) {
JFrame frame = new JFrame("MultiHighlight");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTextArea area = new JTextArea(5, 20);
area.setText("ww\nw.jexp.c\nom");
frame.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
JButton b = new JButton("Highlight All Vowels");
b.addActionListener(new MultiHighlight(area, "aeiouAEIOU"));
frame.getContentPane().add(b, BorderLayout.SOUTH);
frame.pack();
frame.setVisible(true);
}
}

</source>



== implements Highlighter.HighlightPainter ==



<source lang="java">

import java.awt.BorderLayout;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.awt.Shape;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.text.BadLocationException;
import javax.swing.text.Caret;
import javax.swing.text.DefaultCaret;
import javax.swing.text.Highlighter;
import javax.swing.text.JTextComponent;
public class LineHighlightPainter implements Highlighter.HighlightPainter {
private void paintLine(Graphics g, Rectangle r, int x2) {
int ytop = r.y + r.height - 3;
g.fillRect(r.x, ytop, x2 - r.x, 3);
}
public void paint(Graphics g, int p0, int p1, Shape bounds, JTextComponent c) {
Rectangle r0 = null, r1 = null, rbounds = bounds.getBounds();
int xmax = rbounds.x + rbounds.width;
try {
r0 = c.modelToView(p0);
r1 = c.modelToView(p1);
} catch (BadLocationException ex) {
return;
}
if ((r0 == null) || (r1 == null))
return;
g.setColor(c.getSelectionColor());
// special case if p0 and p1 are on the same line
if (r0.y == r1.y) {
paintLine(g, r0, r1.x);
return;
}
// first line, from p1 to end-of-line
paintLine(g, r0, xmax);
// all the full lines in between, if any (assumes that all lines have
// the same height--not a good assumption with JEditorPane/JTextPane)
r0.y += r0.height; // move r0 to next line
r0.x = rbounds.x; // move r0 to left edge
while (r0.y < r1.y) {
paintLine(g, r0, xmax);
r0.y += r0.height; // move r0 to next line
}
// last line, from beginning-of-line to p1
paintLine(g, r0, r1.x);
}
public static void main(String args[]) {
// extend DefaultCaret as an anonymous inner class
Caret lineHighlightPainterCaret = new DefaultCaret() {
private Highlighter.HighlightPainter lhp = new LineHighlightPainter();
// override getSelectionPainter to return the LineHighlightPainter
protected Highlighter.HighlightPainter getSelectionPainter() {
return lhp;
}
};
JFrame frame = new JFrame("LineHighlightPainter demo");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
JTextArea area = new JTextArea(9, 45);
area.setCaret(lineHighlightPainterCaret);
area.setLineWrap(true);
area.setWrapStyleWord(true);
area.setText("This is the story\nof the hare who\nlost his spectacles.");
frame.getContentPane().add(new JScrollPane(area), BorderLayout.CENTER);
frame.pack();
frame.setVisible(true);
}
}

</source>

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в 17:43, 31 мая 2010

Admin: 1 версия