Pino
Reputation: 629
Specific words don't change color in a JTextPane [java]
I'm writing a code whose aim is to have a simil-text editor, where some words (written in the code below), change color when being type, or load from a .txt file taken from a JFileChooser. This is the code:
package AppPackage;
import java.awt.Color;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import javax.swing.JFileChooser;
import javax.swing.JTextPane;
import javax.swing.filechooser.FileNameExtensionFilter;
import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.DefaultStyledDocument;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
/**
*
* @author Alessandro
*/
public class NewJFrame extends javax.swing.JFrame {
/** Creates new form NewJFrame */
public NewJFrame() {
initComponents();
final StyleContext cont = StyleContext.getDefaultStyleContext();
final AttributeSet attrGray = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.gray);
final AttributeSet attrGreen = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.GREEN);
final AttributeSet attrBlue = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.BLUE);
final AttributeSet attrRed = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.RED);
final AttributeSet attrBlack = cont.addAttribute(cont.getEmptySet(), StyleConstants.Foreground, Color.BLACK);
DefaultStyledDocument doc = new DefaultStyledDocument() {
@Override
public void insertString (int offset, String str, AttributeSet a) throws BadLocationException {
super.insertString(offset, str, a);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offset);
if (before < 0) before = 0;
int after = findFirstNonWordChar(text, offset + str.length());
int wordL = before;
int wordR = before;
while (wordR <= after) {
if (wordR == after || String.valueOf(text.charAt(wordR)).matches("\\W")) {
if (text.substring(wordL, wordR).matches("(\\W)*(System)"))
setCharacterAttributes(wordL, wordR - wordL, attrBlue, false);
else if (text.substring(wordL, wordR).matches("(\\W)*(Mobile)"))
setCharacterAttributes(wordL, wordR - wordL, attrBlue, false);
else if (text.substring(wordL, wordR).matches("(\\W)*(heaven)"))
setCharacterAttributes(wordL, wordR - wordL, attrBlue, false);
else if (text.substring(wordL, wordR).matches("(\\W)*(calc)"))
setCharacterAttributes(wordL, wordR - wordL, attrBlue, false);
else if (text.substring(wordL, wordR).matches("(\\W)*(private)"))
setCharacterAttributes(wordL, wordR - wordL, attrBlue, false);
else if (text.substring(wordL, wordR).matches("(\\W)*(public)"))
setCharacterAttributes(wordL, wordR - wordL, attrGray, false);
else if (text.substring(wordL, wordR).matches("(\\W)*(party)"))
setCharacterAttributes(wordL, wordR - wordL, attrRed, false);
else
setCharacterAttributes(wordL, wordR - wordL, attrBlack, false);
wordL = wordR;
}
wordR++;
}
}
@Override
public void remove (int offs, int len) throws BadLocationException {
super.remove(offs, len);
String text = getText(0, getLength());
int before = findLastNonWordChar(text, offs);
if (before < 0) before = 0;
int after = findFirstNonWordChar(text, offs);
if (text.substring(before, after).matches("(\\W)*(System)"))
setCharacterAttributes(before, after - before, attrBlue, false);
else if (text.substring(before, after).matches("(\\W)*(PlasmaMembrane)"))
setCharacterAttributes(before, after - before, attrBlue, false);
else if (text.substring(before, after).matches("(\\W)*(Cytosol)"))
setCharacterAttributes(before, after - before, attrBlue, false);
else if (text.substring(before, after).matches("(\\W)*(Organelle)"))
setCharacterAttributes(before, after - before, attrBlue, false);
else if (text.substring(before, after).matches("(\\W)*(Nucleous)"))
setCharacterAttributes(before, after - before, attrBlue, false);
else if (text.substring(before, after).matches("(\\W)*(volume)"))
setCharacterAttributes(before, after - before, attrGray, false);
else if (text.substring(before, after).matches("(\\W)*(rate)"))
setCharacterAttributes(before, after - before, attrRed, false);
else {
setCharacterAttributes(before, after - before, attrBlack, false);
}
}
};
JTextPane txt = new JTextPane(doc);
}
/** This method is called from within the constructor to
* initialize the form.
* WARNING: Do NOT modify this code. The content of this method is
* always regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
openBtn = new javax.swing.JButton();
jScrollPane1 = new javax.swing.JScrollPane();
textModel = new javax.swing.JTextPane();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
openBtn.setText("Open");
openBtn.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
openBtnActionPerformed(evt);
}
});
jScrollPane1.setViewportView(textModel);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(216, 216, 216)
.addComponent(openBtn))
.addGroup(layout.createSequentialGroup()
.addContainerGap()
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 545, Short.MAX_VALUE)))
.addContainerGap())
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(19, 19, 19)
.addComponent(openBtn)
.addGap(18, 18, 18)
.addComponent(jScrollPane1, javax.swing.GroupLayout.DEFAULT_SIZE, 370, Short.MAX_VALUE)
.addContainerGap())
);
pack();
}// </editor-fold>
String spec;
File f;
String filename;
JFileChooser chooser;
private void openBtnActionPerformed(java.awt.event.ActionEvent evt) {
// TODO add your handling code here:
chooser = new JFileChooser();
FileNameExtensionFilter filter = new FileNameExtensionFilter(".txt files", "txt", "text");
chooser.setFileFilter(filter);
int option = chooser.showOpenDialog(null);
if (option == JFileChooser.APPROVE_OPTION) {
f = chooser.getSelectedFile();
filename = f.getAbsolutePath();
String modelSpec = readSpecification();
spec = modelSpec;
textModel.setText(spec);
}
}
public String readSpecification() {
String spec1 = "";
// trying to read from file the specification...
try {
BufferedReader reader = new BufferedReader(new FileReader(filename));
String line = reader.readLine();
while(line!=null) {
spec1 += line + "\n";
line = reader.readLine();
}
} catch (FileNotFoundException ex) {
ex.printStackTrace();
} catch (IOException ex) {
ex.printStackTrace();
}
return spec1;
}
private int findLastNonWordChar (String text, int index) {
while (--index >= 0) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
}
return index;
}
private int findFirstNonWordChar (String text, int index) {
while (index < text.length()) {
if (String.valueOf(text.charAt(index)).matches("\\W")) {
break;
}
index++;
}
return index;
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/* Set the Nimbus look and feel */
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
* For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(NewJFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/* Create and display the form */
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new NewJFrame().setVisible(true);
new NewJFrame();
}
});
}
// Variables declaration - do not modify
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JButton openBtn;
private javax.swing.JTextPane textModel;
// End of variables declaration
}
This is a SSCCE.
No errors or Exceptions appear, but the words don't change color, and I can't understand why. I put the code that should change color in the constructor and put the call new NewJFrame();in the main method.
Can you help me to solve this out?
Thank you!
Upvotes: 0
Views: 241
Answers (1)
krzydyn
Reputation: 1032
Almost you did it ok. Almost. Small changes to your code required:
add parameter for method
initComponents:initComponents(DefaultStyledDocument doc)
pass this parameter to constructor of
JTextPanetextModel = new javax.swing.JTextPane(doc);
remove
JTextPane txt = new JTextPane(doc);fromNewJFrameconstructormove initComponents to the end of the
NewJFrameconstructorinitComponents(doc);
Upvotes: 3
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