Mega Code Archive
HighLight painter and JTextField
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/*
* Copyright (c) 1995 - 2008 Sun Microsystems, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of Sun Microsystems nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* TextFieldDemo.java requires one additional file:
* content.txt
*/
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import javax.swing.AbstractAction;
import javax.swing.ActionMap;
import javax.swing.GroupLayout;
import javax.swing.InputMap;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.LayoutStyle;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.WindowConstants;
import javax.swing.GroupLayout.ParallelGroup;
import javax.swing.GroupLayout.SequentialGroup;
import javax.swing.event.DocumentEvent;
import javax.swing.event.DocumentListener;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultHighlighter;
import javax.swing.text.Highlighter;
public class TextFieldDemo extends JFrame implements DocumentListener {
private JTextField entry;
private JLabel jLabel1;
private JScrollPane jScrollPane1;
private JLabel status;
private JTextArea textArea;
final static Color HILIT_COLOR = Color.LIGHT_GRAY;
final static Color ERROR_COLOR = Color.PINK;
final static String CANCEL_ACTION = "cancel-search";
final Color entryBg;
final Highlighter hilit;
final Highlighter.HighlightPainter painter;
public TextFieldDemo() {
initComponents();
InputStream in = getClass().getResourceAsStream("content.txt");
try {
textArea.read(new InputStreamReader(in), null);
} catch (IOException e) {
e.printStackTrace();
}
hilit = new DefaultHighlighter();
painter = new DefaultHighlighter.DefaultHighlightPainter(HILIT_COLOR);
textArea.setHighlighter(hilit);
entryBg = entry.getBackground();
entry.getDocument().addDocumentListener(this);
InputMap im = entry.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
ActionMap am = entry.getActionMap();
im.put(KeyStroke.getKeyStroke("ESCAPE"), CANCEL_ACTION);
am.put(CANCEL_ACTION, new CancelAction());
}
/**
* This method is called from within the constructor to initialize the form.
*/
private void initComponents() {
entry = new JTextField();
textArea = new JTextArea();
status = new JLabel();
jLabel1 = new JLabel();
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setTitle("TextFieldDemo");
textArea.setColumns(20);
textArea.setLineWrap(true);
textArea.setRows(5);
textArea.setWrapStyleWord(true);
textArea.setEditable(false);
jScrollPane1 = new JScrollPane(textArea);
jLabel1.setText("Enter text to search:");
GroupLayout layout = new GroupLayout(getContentPane());
getContentPane().setLayout(layout);
// Create a parallel group for the horizontal axis
ParallelGroup hGroup = layout
.createParallelGroup(GroupLayout.Alignment.LEADING);
// Create a sequential and a parallel groups
SequentialGroup h1 = layout.createSequentialGroup();
ParallelGroup h2 = layout
.createParallelGroup(GroupLayout.Alignment.TRAILING);
// Add a container gap to the sequential group h1
h1.addContainerGap();
// Add a scroll pane and a label to the parallel group h2
h2.addComponent(jScrollPane1, GroupLayout.Alignment.LEADING,
GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);
h2.addComponent(status, GroupLayout.Alignment.LEADING,
GroupLayout.DEFAULT_SIZE, 450, Short.MAX_VALUE);
// Create a sequential group h3
SequentialGroup h3 = layout.createSequentialGroup();
h3.addComponent(jLabel1);
h3.addPreferredGap(LayoutStyle.ComponentPlacement.RELATED);
h3.addComponent(entry, GroupLayout.DEFAULT_SIZE, 321, Short.MAX_VALUE);
// Add the group h3 to the group h2
h2.addGroup(h3);
// Add the group h2 to the group h1
h1.addGroup(h2);
h1.addContainerGap();
// Add the group h1 to the hGroup
hGroup.addGroup(GroupLayout.Alignment.TRAILING, h1);
// Create the horizontal group
layout.setHorizontalGroup(hGroup);
// Create a parallel group for the vertical axis
ParallelGroup vGroup = layout
.createParallelGroup(GroupLayout.Alignment.LEADING);
// Create a sequential group v1
SequentialGroup v1 = layout.createSequentialGroup();
// Add a container gap to the sequential group v1
v1.addContainerGap();
// Create a parallel group v2
ParallelGroup v2 = layout
.createParallelGroup(GroupLayout.Alignment.BASELINE);
v2.addComponent(jLabel1);
v2.addComponent(entry, GroupLayout.PREFERRED_SIZE,
GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE);
// Add the group v2 tp the group v1
v1.addGroup(v2);
v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);
v1.addComponent(jScrollPane1, GroupLayout.DEFAULT_SIZE, 233,
Short.MAX_VALUE);
v1.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED);
v1.addComponent(status);
v1.addContainerGap();
// Add the group v1 to the group vGroup
vGroup.addGroup(v1);
// Create the vertical group
layout.setVerticalGroup(vGroup);
pack();
}
public void search() {
hilit.removeAllHighlights();
String s = entry.getText();
if (s.length() <= 0) {
message("Nothing to search");
return;
}
String content = textArea.getText();
int index = content.indexOf(s, 0);
if (index >= 0) { // match found
try {
int end = index + s.length();
hilit.addHighlight(index, end, painter);
textArea.setCaretPosition(end);
entry.setBackground(entryBg);
message("'" + s + "' found. Press ESC to end search");
} catch (BadLocationException e) {
e.printStackTrace();
}
} else {
entry.setBackground(ERROR_COLOR);
message("'" + s + "' not found. Press ESC to start a new search");
}
}
void message(String msg) {
status.setText(msg);
}
// DocumentListener methods
public void insertUpdate(DocumentEvent ev) {
search();
}
public void removeUpdate(DocumentEvent ev) {
search();
}
public void changedUpdate(DocumentEvent ev) {
}
class CancelAction extends AbstractAction {
public void actionPerformed(ActionEvent ev) {
hilit.removeAllHighlights();
entry.setText("");
entry.setBackground(entryBg);
}
}
public static void main(String args[]) {
// Schedule a job for the event dispatch thread:
// creating and showing this application's GUI.
SwingUtilities.invokeLater(new Runnable() {
public void run() {
// Turn off metal's use of bold fonts
UIManager.put("swing.boldMetal", Boolean.FALSE);
new TextFieldDemo().setVisible(true);
}
});
}
}
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