Name: rk38400 Date: 11/10/98


When trying to align (vertically) a set of
JLabels and JSliders, the JLabels are being
aligned at the wrong position.

If the JSliders are *not* added to the layout,
the JLabels align on the left edge. If JButtons
are used instead of JSliders, the JLabels also
align correctly.

The first time a JSlider is added, the JLabels are
no longer aligned at the left of the layout.
Instead they are aligned 1/3 of the way over.

import java.util.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

class MySlider2
extends JFrame
implements ChangeListener
 {
     private JSlider scrollerR;
     private JSlider scrollerG;
     private JSlider scrollerB;
     private JLabel labelR;
     private JLabel labelG;
     private JLabel labelB;
     private JPanel labelColor;
     private JPanel topPanel;


     public MySlider2() {
setTitle( "Slider Application" );
setBackground( Color.gray );
topPanel = new JPanel();
   BoxLayout boxLayout = new BoxLayout(topPanel, BoxLayout.Y_AXIS);
topPanel.setLayout( boxLayout);
topPanel.setBackground(Color.green);
getContentPane().setLayout(new FlowLayout());
getContentPane().add( topPanel );

// Create the labels
labelR = new JLabel( "Red", SwingConstants.LEFT );
labelG = new JLabel( "Green", SwingConstants.RIGHT );
labelB = new JLabel( "Blue" );
labelColor = new JPanel();
labelColor.setBackground( new Color( 0, 0, 0 ) );

// Create the scrollbars
scrollerR = new JSlider( SwingConstants.HORIZONTAL,
0, 255, 0 );
scrollerR.setMajorTickSpacing( 40 );
scrollerR.setMinorTickSpacing( 10 );
scrollerR.setPaintTicks( true );
scrollerR.setPaintLabels( true );
scrollerR.addChangeListener( this );

scrollerG = new JSlider( SwingConstants.HORIZONTAL,
0, 255, 0 );
scrollerG.setMajorTickSpacing( 40 );
scrollerG.setMinorTickSpacing( 10 );
scrollerG.setPaintTicks( true );
scrollerG.setPaintLabels( true );
scrollerG.addChangeListener( this );

scrollerB = new JSlider( SwingConstants.HORIZONTAL, 0, 255, 0 );
scrollerB.setMajorTickSpacing( 40 );
scrollerB.setMinorTickSpacing( 10 );
scrollerB.setPaintTicks( true );
scrollerB.setPaintLabels( true );
scrollerB.addChangeListener( this );
topPanel.add( labelR );
   topPanel.add( scrollerR );
topPanel.add( labelB );
   topPanel.add( scrollerB );
topPanel.add( labelG );
   topPanel.add( scrollerG );
  topPanel.add( labelColor );
topPanel.setPreferredSize(new Dimension (300, 300));
pack();
     }


// Watch for scroll bar adjustments
public void stateChanged( ChangeEvent event )
{
// The event came from our scrollers handle it.
if( event.getSource() == scrollerR ||
event.getSource() == scrollerG ||
event.getSource() == scrollerB )
{
// Get the current color settings
int iRed = scrollerR.getValue();
int iGreen = scrollerG.getValue();
int iBlue = scrollerB.getValue();

// Update the color chip
labelColor.setBackground(
new Color( iRed, iGreen, iBlue ) );
labelColor.repaint();
}
}

public static void main( String args[] )
{
// Create an instance of the test application
MySlider2 mainFrame = new MySlider2();
mainFrame.setVisible( true );
}
}
(Review ID: 42172)
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