Formatting for JTextPane

[Pratik Khetia]

Hi I am adding a file over here. When you run the program you will see a JTextField and a JTextPane. Whatever being directly written into JTextPane can be formatted later but I want to set some default Text Color when I write smething into JTextField and hit enter. B'se it doesn't do that. I would really appriciate if someone can look into this.

thanks in advance
Pratik
// Copyright MageLang Institute; Version $Id: //depot/main/src/edu/modules/Swing/magercises/TextPane/Solution/Formatter.java#2 $
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.text.*;
import java.io.*;
import java.util.*;
public class Formatter1 extends JFrame {
final static int WIDTH = 400;
final static int HEIGHT = 300;
StyledDocument doc;
JTextPane pane;
JTextField test;
JLabel statusInfo;
public Formatter1(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);
test = new JTextField();
// Place in JScrollPane
JScrollPane sp = new JScrollPane (pane);
c.add(sp, BorderLayout.CENTER);
c.add(test, BorderLayout.NORTH);
test.addActionListener (new ActionListener() {
public void actionPerformed (ActionEvent e)
{
new StyledEditorKit.ForegroundAction ("set-foreground-red", Color.red);
MutableAttributeSet attr = new SimpleAttributeSet();
StyleConstants.setForeground(attr, Color.red);
pane.setCharacterAttributes(attr, true);
new StyledEditorKit.ForegroundAction ("set-foreground-blue", Color.blue);
pane.setSelectionStart(pane.getText().length());
pane.setText(test.getText());
pane.setSelectionEnd(pane.getText().length());
pane.setSelectedTextColor(Color.blue);
new StyledEditorKit.ForegroundAction ("set-foreground-blue", Color.blue);
attr = new SimpleAttributeSet();
StyleConstants.setForeground(attr, Color.red);
pane.setCharacterAttributes(attr, true);
new StyledEditorKit.ForegroundAction ("set-foreground-red", Color.red);
}
});
// Setup Menus
JMenuBar menuBar = new JMenuBar();
setJMenuBar (menuBar);
// Setup File Menu
JMenuItem item;
// 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);

}
public static void main (String args[]) {
Formatter1 frame = new Formatter1("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 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);
}
}

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;
}
}
}

[Manfred Leonhardt]

Hi Pratik,
I don't really know much about the StyleConstants and StyledEditorKit. My approach would be to use a private Color class variable say: currentColor. Default it to black:
private currentColor = Color.black;
Then I would create a method to create my color menu items:

  public JMenuItem createColorItem( String name, final Color color )
  {
    JMenuItem item = new JMenuItem( name );
    item.setIcon( new ColoredBox( color ) );
    item.addActionListener(
      new ActionListener()
      {
        public void actionPerformed( ActionEvent ae )
        {
          currentColor = color;
        }
      });
    return( item );
  }

Then I would clean up the create menu with the following:

    // Setup Color Menu
    JMenu color = new JMenu( "Color" );
    color.add( item = createColorItem( "Red", Color.red ) );
    color.add( item = createColorItem( "Orange", Color.orange ));
    color.add (item = createColorItem( "Yellow", Color.yellow ));
    color.add (item = createColorItem( "Green", Color.green ));
    color.add (item = createColorItem( "Blue", Color.blue ));
    color.add (item = createColorItem( "Magenta", Color.magenta ));
    color.add (item = new JMenuItem ("Custom Color"));
    item.addActionListener(
      new ActionListener() 
      {
        public void actionPerformed (ActionEvent e) 
        {
          doColorCommand();
        }
      });

Another change I would make would be inside the test actionPerformed method. I would use the currentColor (class variable) and select the new stuff color it and then unselect it:

    test.addActionListener (
      new ActionListener() 
      {
        public void actionPerformed (ActionEvent e)
        {
          MutableAttributeSet attr = new SimpleAttributeSet();
          StyleConstants.setForeground( attr, currentColor );
          pane.setCharacterAttributes( attr, true );
          pane.setText( test.getText() );
          pane.setSelectionStart(0);
          pane.setSelectionEnd( pane.getText().length() );
          pane.setCharacterAttributes( attr, true );
          pane.setSelectionStart( pane.getSelectionEnd() );
        }
      });

Then it should work as expected.
Regards,
Manfred.