How to set multiple fonts inJTextArea or JTextPane

[srini taek]

Hi javalovers,
This is the first time am writin to javaranch.
My question is it possible to obtain multiple fonts in JTextArea or JTextPane .I have tried in JTextArea to find
that it supports only one font.Am currently working on a wordprocessing applet can anyone suggest me which component
would be suitable to get input text and also have multiple fonts.Something like i select one word from my sentence and
want that to be bold .So which swing component supports multiple fonts.

[Manfred Leonhardt]

Hi Srini,
This might be overkill but take a look at the application below.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import java.io.*;
import java.util.*;
public class Formatter extends JFrame {
  final static int WIDTH = 400;
  final static int HEIGHT = 300;
  StyledDocument doc;
  JTextPane pane;
  JLabel statusInfo;
  public Formatter(String lab) {
    super (lab);
    // Get ContentPane
    Container c = getContentPane();
    // Setup Status Message Area
    statusInfo = new JLabel();
    c.add( statusInfo, BorderLayout.SOUTH );
    // Setup Text Pane
    doc = new DefaultStyledDocument();
    pane = new JTextPane( doc );
    // Place in JScrollPane
    JScrollPane sp = new JScrollPane( pane );
    c.add( sp, BorderLayout.CENTER );
    // Setup Menus
    JMenuBar menuBar = new JMenuBar();
    setJMenuBar( menuBar );
    // Setup File Menu
    JMenu file = new JMenu( "File" );
    JMenuItem item;
    file.add (item = new JMenuItem( "New" ));
    item.addActionListener(
      new ActionListener() 
      {
        public void actionPerformed( ActionEvent e ) 
        {
          doNewCommand();
        }
      });
    file.add( item = new JMenuItem( "Open" ) );
    item.addActionListener( 
      new ActionListener() 
      {
        public void actionPerformed( ActionEvent e ) 
        {
          doOpenCommand();
        }
      });
    file.add( item = new JMenuItem( "Load Text" ) );
    item.addActionListener( 
      new ActionListener() 
      {
        public void actionPerformed( ActionEvent e ) 
        {
          doLoadCommand();
        }
      });
    file.add( item = new JMenuItem( "Save" ) );
    item.addActionListener( 
      new ActionListener() 
      {
        public void actionPerformed( ActionEvent e ) 
        {
          doSaveCommand();
        }
      });
    file.addSeparator();
    file.add( item = new JMenuItem( "Close" ) );
    item.addActionListener(
      new ActionListener() 
      {
        public void actionPerformed (ActionEvent e) 
        {
          doCloseCommand();
        }
      });
    menuBar.add( file );
    // Setup Color Menu
    JMenu color = new JMenu( "Color" );
    color.add( item = new JMenuItem( "Red" ) );
    item.setIcon( new ColoredBox( Color.red ) );
    item.addActionListener(
      new StyledEditorKit.ForegroundAction( "set-foreground-red", 
                                            Color.red ) );
    color.add( item = new JMenuItem( "Orange" ) );
    item.setIcon( new ColoredBox( Color.orange ) );
    item.addActionListener(
      new StyledEditorKit.ForegroundAction( "set-foreground-orange", 
                                            Color.orange ) );
    color.add( item = new JMenuItem( "Yellow" ) );
    item.setIcon( new ColoredBox( Color.yellow ) );
    item.addActionListener(
      new StyledEditorKit.ForegroundAction( "set-foreground-yellow", 
                                             Color.yellow ) );
    color.add( item = new JMenuItem( "Green" ) );
    item.setIcon( new ColoredBox( Color.green ) );
    item.addActionListener(
      new StyledEditorKit.ForegroundAction( "set-foreground-green", 
                                            Color.green ) );
    color.add( item = new JMenuItem( "Blue" ) );
    item.setIcon( new ColoredBox( Color.blue ) );
    item.addActionListener( 
      new StyledEditorKit.ForegroundAction( "set-foreground-blue", 
                                            Color.blue ) );
    color.add( item = new JMenuItem( "Magenta" ) );
    item.setIcon( new ColoredBox( Color.magenta ) );
    item.addActionListener(
      new StyledEditorKit.ForegroundAction( "set-foreground-magenta", 
                                            Color.magenta ) );
    color.add( item = new JMenuItem( "Custom Color" ) );
    item.addActionListener(
      new ActionListener() 
      {
        public void actionPerformed (ActionEvent e) 
        {
          doColorCommand();
        }
      });
    menuBar.add (color);
    // Setup Font Menu
    JMenu font = new JMenu( "Font" );
    font.add( item = new JMenuItem( "12" ) );
    item.addActionListener(
      new StyledEditorKit.FontSizeAction( "font-size-12", 12 ) );
    font.add( item = new JMenuItem( "24" ) );
    item.addActionListener(
      new StyledEditorKit.FontSizeAction( "font-size-24", 24 ) );
    font.add( item = new JMenuItem( "36" ) );
    item.addActionListener( 
      new StyledEditorKit.FontSizeAction( "font-size-36", 36 ) );
    font.addSeparator();
    font.add( item = new JMenuItem( "Serif" ) );
    item.setFont( new Font( "Serif", Font.PLAIN, 12 ) );
    item.addActionListener(
      new StyledEditorKit.FontFamilyAction( "font-family-Serif", "Serif" ) );
    font.add(item = new JMenuItem ("SansSerif"));
    item.setFont( new Font( "SansSerif", Font.PLAIN, 12 ) );
    item.addActionListener(new
      StyledEditorKit.FontFamilyAction (
        "font-family-SansSerif", "SansSerif"));
    font.add(item = new JMenuItem ("Monospaced"));
    item.setFont( new Font( "Monospaced", Font.PLAIN, 12 ) );
    item.addActionListener( 
      new StyledEditorKit.FontFamilyAction( "font-family-Monospaced", 
                                            "Monospaced" ) );
    font.addSeparator();
    font.add( item = new JMenuItem( "Bold" ) );
    item.setFont( new Font( "Serif", Font.BOLD, 12 ) );
    item.addActionListener( new StyledEditorKit.BoldAction() );
    font.add( item = new JMenuItem( "Italic" ) );
    item.setFont( new Font( "Serif", Font.ITALIC, 12 ) );
    item.addActionListener( new StyledEditorKit.ItalicAction() );
    menuBar.add( font );
    // Setup Insert Menu
    JMenu insert = new JMenu("Insert");
    insert.add (item = new JMenuItem ("Image File"));
    item.addActionListener (new ActionListener() {
      public void actionPerformed (ActionEvent e) {
        doInsertImageCommand();
      }
    });
    menuBar.add (insert);
  }
  public static void main( String args[] ) 
  {
    Formatter frame = new Formatter( "Mini Text Editor" );
    frame.addWindowListener(
      new WindowAdapter() 
      {
        public void windowClosing(WindowEvent e) 
        {
          System.exit(0);
        }
      });
    frame.setSize( WIDTH, HEIGHT );
    frame.setVisible( true );
  }
  public void doNewCommand() 
  {
    pane.setStyledDocument (doc = new DefaultStyledDocument());
  }
  public void doCloseCommand() 
  {
    System.exit (0);
  }
  public void doOpenCommand() 
  {
    try 
    {
      FileInputStream fis = new FileInputStream ("doc.ser");
      ObjectInputStream ois = new ObjectInputStream (fis);
      doc = (StyledDocument)ois.readObject();
      ois.close();
      pane.setStyledDocument(doc);
      validate();
      statusInfo.setText( "Reloaded from disk" );
    } 
    catch (Exception e) 
    {
      statusInfo.setText( "Unable to reload" );
      e.printStackTrace();
    }
  }
  public void doSaveCommand() 
  {
    try 
    {
      FileOutputStream fos = new FileOutputStream( "doc.ser" );
      ObjectOutputStream oos = new ObjectOutputStream( fos );
      oos.writeObject( doc );
      oos.flush();
      oos.close();
      statusInfo.setText( "Saved to disk" );
    } 
    catch( IOException e ) 
    {
      statusInfo.setText( "Unable to save" );
      e.printStackTrace();
    }
  }
  public void doLoadCommand() {
    String msg;
    JFileChooser chooser = new JFileChooser();
    int status = chooser.showOpenDialog(this);
    if (status == JFileChooser.APPROVE_OPTION) {
      char data[];
      final Runnable doWaitCursor = new Runnable() {
        public void run() {
          setCursor (Cursor.getPredefinedCursor(Cursor.WAIT_CURSOR));
        }
      };
      Thread appThread = new Thread() {
        public void run() {
          try {
             SwingUtilities.invokeAndWait(doWaitCursor);
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      };
      appThread.start(); 
      File f = chooser.getSelectedFile();
      try {
        // Clear out current document
        pane.setStyledDocument (doc = new DefaultStyledDocument());
        // Read in text file
        FileReader fin = new FileReader (f);
        BufferedReader br = new BufferedReader (fin);
        char buffer[] = new char[4096];
        int len;
        while ((len = br.read (buffer, 0, buffer.length)) != -1) {
          // Insert into pane
          doc.insertString(doc.getLength(), 
            new String (buffer, 0, len), null);
        }
        statusInfo.setText ("Loaded: " + f.getName());
      } catch (BadLocationException exc) {
        statusInfo.setText ("Error loading: " + f.getName());
      } catch (FileNotFoundException exc) {
        statusInfo.setText ("File Not Found: " + f.getName());
      } catch (IOException exc) {
        statusInfo.setText ("IOException: " + f.getName());
      }
      final Runnable undoWaitCursor = new Runnable() {
        public void run() {
        setCursor (Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));
        }
      };
      appThread = new Thread() {
        public void run() {
          try {
             SwingUtilities.invokeAndWait(undoWaitCursor);
          } catch (Exception e) {
            e.printStackTrace();
          }
        }
      };
      appThread.start(); 
    }
  }
  public void doColorCommand() 
  {
    Color color = JColorChooser.showDialog( this, "Color Chooser", 
                                            Color.cyan );
    if (color != null) 
    {
      MutableAttributeSet attr = new SimpleAttributeSet();
      StyleConstants.setForeground( attr, color );
      pane.setCharacterAttributes( attr, false ); 
    }
  }
  public void doInsertImageCommand() 
  {
    JFileChooser chooser = new JFileChooser();
    int status = chooser.showOpenDialog( this );
    if( status == JFileChooser.APPROVE_OPTION ) 
    {
      File file = chooser.getSelectedFile();
      Icon icon = new ImageIcon( file.getAbsolutePath() );
      pane.insertIcon( icon );
    }
  }
  class ColoredBox implements Icon 
  {
    Color color;
    public ColoredBox( Color c ) 
    {
      color = c;
    }
    public void paintIcon( Component c, Graphics g, int x, int y ) 
    {
      g.setColor( color );
      g.fillRect( x, y, getIconWidth(), getIconHeight() );
    }
    public int getIconWidth() 
    {
      return 10;
    }
    public int getIconHeight() 
    { 
      return 10;
    }
  }
}

Enjoy,
Manfred.

[selvas kumars]

Hi Manfred ,
If there is an alignment menu and a image is placed in the textpane, does alignment work for image too..
(i.e if the user selects a line which has image and does right alignment whether the image too move along with it or only the text?)
thanks,
Regards,
silva.