Best books about JAVA programming:

• Head First JAVA, Second Editon
• Effective Java Programming Language Guide
• Professional Java, JDK 5 Edition
• Ivor Horton's Beginning Java 2, JDK 5 Edition

JAVA JSlide Color

The following code adds color to JSlide. User may customize the color showing on JSlide. This example has following Java files:

• MThumbSliderExample.java
• MThumbSlider.java
• BasicMThumbSliderUI.java
• MThumbSliderAdditional.java
• MThumbSliderAdditionalUI.java
• AssistantUIManager.java
  
  
  
  import java.awt.*;
  import javax.swing.*;
  import javax.swing.event.*;
  import javax.swing.plaf.*;
  import javax.swing.plaf.basic.*;
  

  public class BasicMThumbSliderUI extends BasicSliderUI
  implements MThumbSliderAdditional {

  MThumbSliderAdditionalUI additonalUi;
  MouseInputAdapter mThumbTrackListener;
  
  
  public static ComponentUI createUI(JComponent c) {
  return new BasicMThumbSliderUI((JSlider)c);
  }

  
  public BasicMThumbSliderUI() {
  super(null);
  }
  
  public BasicMThumbSliderUI(JSlider b) {
  super(b);
  }

  
  public void installUI(JComponent c) {
  additonalUi = new MThumbSliderAdditionalUI(this);
  additonalUi.installUI(c);
  mThumbTrackListener = createMThumbTrackListener((JSlider) c);
  super.installUI(c);
  }
  
  public void uninstallUI(JComponent c) {
  super.uninstallUI(c);
  additonalUi.uninstallUI(c);
  additonalUi = null;
  mThumbTrackListener = null;
  }
  
  protected MouseInputAdapter createMThumbTrackListener( JSlider slider ) {
  return additonalUi.trackListener;
  }
  
  protected TrackListener createTrackListener( JSlider slider ) {
  return null;
  }
  
  protected ChangeListener createChangeListener( JSlider slider ) {
  return additonalUi.changeHandler;
  }

  protected void installListeners( JSlider slider ) {
  slider.addMouseListener(mThumbTrackListener);
  slider.addMouseMotionListener(mThumbTrackListener);
  slider.addFocusListener(focusListener);
  slider.addComponentListener(componentListener);
  slider.addPropertyChangeListener( propertyChangeListener );
  slider.getModel().addChangeListener(changeListener);
  }

  protected void uninstallListeners( JSlider slider ) {
  slider.removeMouseListener(mThumbTrackListener);
  slider.removeMouseMotionListener(mThumbTrackListener);
  slider.removeFocusListener(focusListener);
  slider.removeComponentListener(componentListener);
  slider.removePropertyChangeListener( propertyChangeListener );
  slider.getModel().removeChangeListener(changeListener);
  }

  protected void calculateGeometry() {
  super.calculateGeometry();
  additonalUi.calculateThumbsSize();
  additonalUi.calculateThumbsLocation();
  }

  
  
  protected void calculateThumbLocation() {}
  
  
  
  
  Rectangle zeroRect = new Rectangle();
  
  public void paint( Graphics g, JComponent c ) {
  
  Rectangle clip = g.getClipBounds();
  thumbRect = zeroRect;
  
  super.paint( g, c );
  
  int thumbNum = additonalUi.getThumbNum();
  Rectangle[] thumbRects = additonalUi.getThumbRects();
  
  for (int i=thumbNum-1; 0<=i; i--) {
  if ( clip.intersects( thumbRects[i] ) ) {
  thumbRect = thumbRects[i];
  
  paintThumb( g );
  
  }
  }
  }

  
  public void scrollByBlock(int direction) {}
  public void scrollByUnit(int direction) {}
  
  //
  // MThumbSliderAdditional
  //
  public Rectangle getTrackRect() {
  return trackRect;
  }
  
  public Dimension getThumbSize() {
  return super.getThumbSize();
  }
  
  public int xPositionForValue(int value) {
  return super.xPositionForValue( value);
  }
  
  public int yPositionForValue(int value) {
  return super.yPositionForValue( value);
  }
  
  }