JTabbedPane

[Jess Ishasder]

Hi
I have created a JTabbedPane object. There are two panels on it, tab "Add" and tab "Remove" represent them. I would like to set the background color of tab "Add" to be yellow when the applet is first loaded. Then when one tab is selected(i.e. active), I would like to change its background color to be yellow.
Can any of you teach me how to do that?
Thank you !!!

[Manfred Leonhardt]

Hi,
I can teach you how to do that.
First: Re-register with a valid user name. Here at the ranch we REQUIRE that the user name be firstName + space + lastName. If you wish to continue posting here change your name soon! The ranch naming policy: http://www.javaranch.com/name.jsp
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To perform the tab coloring you just need to set the color in the UI manager with the following line in your code:
UIManager.put( "TabbedPane.selected", Color.green );
The following example uses it.

  
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.plaf.*;
public class TabColorExample extends JPanel 
{                     
  public TabColorExample() {
    setLayout( new BorderLayout() );
    
    UIManager.put( "TabbedPane.selected", Color.green );
    
    JTabbedPane tabbedPane = new JTabbedPane();
    String tabs[] = { "One", "Two", "Three", "Four" };
    for( int i=0; i<tabs.length; i++ ) 
    {
      tabbedPane.addTab(tabs[i], createPane(tabs[i]));
    }
    tabbedPane.setSelectedIndex(0);
    add(tabbedPane, BorderLayout.CENTER);
  }
  
  JPanel createPane( String s ) 
  {
    JPanel p = new JPanel();
    p.add( new JLabel( s ) );
    return( p );
  }
  
  public static void main( String[] args ) 
  {
    JFrame frame = new JFrame( "Tab color Example" );
    frame.addWindowListener( 
      new WindowAdapter() 
      {
        public void windowClosing( WindowEvent e ) 
        {
          System.exit(0);
        }
      });
    frame.getContentPane().add( new TabColorExample() );
    frame.setSize( 200, 100 );
    frame.setVisible( true );
  }
}

Enjoy,
Manfred.

[Pascal Got]

It's great ....
Following the same idea, how can I change the font color ? (if I want to make it bold for example)
Also where can I find the declaration of all those resources like "TabbedPane.selected" ?
Cheers
Pascal

[Manfred Leonhardt]

Hi Pascal,
To change the font (size, type, or color) simply add the following lines to the program I already posted:
UIManager.put( "TabbedPane.font", new Font( "Dialog", Font.ITALIC, 24 ) );
UIManager.put( "TabbedPane.foreground", Color.red );
To find out those great UIManager properties you can run the following class.

import java.util.*;
import javax.swing.*;
public class UIManagerProps
{
  public static void main(String[] args) 
  {
    UIDefaults def = UIManager.getDefaults();
    Enumeration e = def.keys();
    while( e.hasMoreElements() )
    {
      System.out.println( e.nextElement() );
    }
  }
}

Regards,
Manfred.