Java SE (Java Platform, Standard Edition)

Hello there, I've extended a SpinnerNumberModel, instantiated a JSpinner.NumberEditor and a JSpinner, and then set the model and editor of my JSpinner object accordingly but somehow when I try to edit the value through the spinner it doesn't respond(as in doesn't change the model's current value, gui animation is just fine) nor does it try to increment/decrement the value and I want to know why. It displays correctly though.

Here's the declaration for the class( ComboSlider ):

package tools.internal.colorchooser;

/**
 *
 * @author scphan
 */

import java.awt.*;
import java.awt.event.ActionEvent;
import javax.swing.*;
import javax.swing.event.ChangeEvent;
import javax.swing.event.ChangeListener;

public class ComboSlider extends JPanel implements ChangeListener, ColorController
{
	private final AbstractSliderController slider;
	private final JSpinner spinner;

	public ComboSlider( final AbstractSliderController slider )
	{
		super();
		if ( slider==null )
			throw new NullPointerException( "slider arg is null" );
		
		this.slider = slider;
		this.spinner = new JSpinner(new CustomSpinnerModel());
		final JSpinner.NumberEditor spinnerEditor = new JSpinner.NumberEditor( this.spinner, "0.00" );
		this.spinner.setEditor( spinnerEditor );
		this.spinner.setPreferredSize(new Dimension( 60, 20 )); this.spinner.addChangeListener( this );
		setModel( this.slider.getModel() );

		setLayout(new GridBagLayout());
		final GridBagConstraints gbc = new GridBagConstraints();
		gbc.fill = GridBagConstraints.BOTH; gbc.gridy = 0;
		gbc.gridx = 0; gbc.weighty = 1; gbc.weightx = 0;
		add( this.spinner, gbc );
		gbc.gridx = 1; gbc.weighty = 1; gbc.weightx = 1;
		add( this.slider, gbc );
	}

	public CCModel getModel()
	{
		return this.slider.getModel();
	}
	public void setModel( final CCModel model )
	{
		if ( model==null )
			throw new NullPointerException( "model arg is null" );
		else
		{
			model.addController( "combo_slider_"+this.slider.getSCCID(), this );
		}
	}
	public void fireModelChanged()
	{
		((CustomSpinnerModel)this.spinner.getModel()).fireModelChanged();
	}

	public void stateChanged( ChangeEvent e )
	{
	}

	protected class CustomSpinnerModel extends SpinnerNumberModel
	{
		void fireModelChanged()
		{
			fireStateChanged();
		}

		@Override
		public Object getValue()
		{
			return ComboSlider.this.slider.getValue();
		}

		@Override
		public void setValue( Object value )
		{
			System.out.println( "setValue() called" );
			ComboSlider.this.slider.setValue( (Double)value );
			fireStateChanged();
		}

		@Override
		public Object getNextValue()
		{
			System.out.println( "getNextValue() called" );
			final double ovalue = ComboSlider.this.slider.getValue(), xvalue = Math.ceil( ovalue );
			final double xdelta = Math.abs( xvalue-ovalue );

			final double nextValue = (xdelta<0.001)?Math.round(ovalue+1):xvalue;

			if ( getMaximum().compareTo( nextValue ) >= 0 )
			{
				return nextValue;
			}
			else
			{
				return ovalue;
			}
		}

		@Override
		public Object getPreviousValue()
		{
			final double ovalue = ComboSlider.this.slider.getValue(), xvalue = Math.floor( ovalue );
			final double xdelta = Math.abs( ovalue-xvalue );

			final double previousValue = (xdelta<0.0001)?Math.round(ovalue-1):xvalue;
			if ( getMinimum().compareTo( previousValue ) <= 0 )
			{
				return previousValue;
			}
			else
			{
				return ovalue;
			}
		}

		@Override
		public Comparable getMaximum()
		{
			final AbstractSliderController slider = ComboSlider.this.slider;
			if ( slider instanceof RGBSlider )
			{
				return 255;
			}
			else
			{
				return 100;
			}
		}

		@Override
		public Comparable getMinimum()
		{
			final AbstractSliderController slider = ComboSlider.this.slider;
			if ( slider instanceof RGBSlider )
			{
				return 0;
			}
			else
			{
				return 0;
			}
		}

		@Override
		public void setMaximum( Comparable value )
		{
			throw new UnsupportedOperationException();
		}

		@Override
		public void setMinimum( Comparable value )
		{
			throw new UnsupportedOperationException();
		}

		@Override
		public Number getNumber()
		{
			return (Number)getValue();
		}

		@Override
		public Number getStepSize()
		{
			throw new UnsupportedOperationException();
		}

		@Override
		public void setStepSize( Number stepSize )
		{
			throw new UnsupportedOperationException();
		}
	}


	// *** for testing purposes *** //
	public static void main( String... args )
	{
		JFrame f = new JFrame( "ComboSlider Test" );
		f.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );

		final CCModel model = new CCModel(); model.setCurrentColor(new tools.internal.colorchooser.color.HSVColor( Color.GREEN ));
		final HSVSlider hue = new HSVSlider( model, HSVSlider.HUE_MODE );
		final ComboSlider cslider = new ComboSlider( hue );
		f.add( cslider, BorderLayout.CENTER );

		f.setSize( 400, 60 );
		f.setVisible( true );
	}
}

Any ideas would be helpful, thanks.
I'm just wondering why the spinner components(inc/dec btn.'s and textfield) just went dead as if they didn't trigger any events.
I'm not sure whether it's something trivial either.