Java OpenGL MouseListener для смены цвета полигона

Реализовываю прямоугольный полигон на OpenGL. Никак не могу сделать смену цвета этого полигона по клику мыши. Сам Mouselistener сделал, а как задать смену цвета не врубаюсь. Помогите пожалуйста!

 import com.jogamp.newt.event.MouseEvent;
import com.jogamp.newt.event.MouseListener;
import com.jogamp.opengl.*;
import com.jogamp.opengl.awt.GLCanvas;
import com.jogamp.opengl.awt.GLJPanel;
import com.jogamp.opengl.glu.GLU;
import com.jogamp.opengl.util.FPSAnimator;
import com.jogamp.opengl.util.gl2.GLUT;
import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import static javax.swing.text.html.HTML.Tag.SELECT;
public class Cube implements GLEventListener {
    public static DisplayMode dm, dm_old;
    private GLU glu = new GLU();
    private float rquad = 0.0f;
    @Override
    public void display( GLAutoDrawable drawable ) {
        final GL2 gl = drawable.getGL().getGL2();
        gl.glClear(GL2.GL_COLOR_BUFFER_BIT | GL2.GL_DEPTH_BUFFER_BIT );
        gl.glLoadIdentity();
        gl.glTranslatef( 0f, 0f, -5.0f );
        gl.glEnable(GL2.GL_LIGHTING);
        gl.glEnable(GL2.GL_LIGHT5);
        gl.glEnable(GL2.GL_COLOR_MATERIAL);
// Rotate The Cube On X, Y & Z 
//gl.glRotatef(rquad, 1.0f, 1.0f, 1.0f); 
//giving different colors to different sides 
        gl.glBegin(GL2.GL_QUADS); // Start Drawing
        gl.glColor3f(0.5f, 0.5f, 1.0f);
        gl.glTexCoord2f(3f, 0f); gl.glVertex2f(-2.0f, 1.0f); // Top Left
        gl.glColor3f(1.0f, 1.0f, 1.0f);
        gl.glTexCoord2f(0.0f, 0.0f); gl.glVertex2f(2.0f, 1.0f); // Top Right
        gl.glColor3f(0.5f, 0.5f, 1.0f);
        gl.glTexCoord2f(0.0f, 2.0f); gl.glVertex2f(2.0f, -1.0f); // Bottom Right
        gl.glColor3f(1.0f, 1.0f, 1.0f);
        gl.glTexCoord2f(3f, 2.0f); gl.glVertex2f(-2.0f, -1.0f); // Bottom Left
        gl.glEnd(); // Done Drawing The Quad
        gl.glFlush();
        rquad -= 0.15f;

    }
    @Override
    public void dispose( GLAutoDrawable drawable ) {
// TODO Auto-generated method stub 
    }
    @Override
    public void init( GLAutoDrawable drawable ) {
        final GL2 gl = drawable.getGL().getGL2();
        gl.glShadeModel( GL2.GL_SMOOTH );
        gl.glClearColor( 0f, 0f, 0f, 0f );
        gl.glClearDepth( 1.0f );
        gl.glEnable( GL2.GL_DEPTH_TEST );
        gl.glDepthFunc( GL2.GL_LEQUAL );
        gl.glHint( GL2.GL_PERSPECTIVE_CORRECTION_HINT, GL2.GL_NICEST );
    }
    @Override
    public void reshape( GLAutoDrawable drawable, int x, int y, int width, int height ) {
// TODO Auto-generated method stub 
        final GL2 gl = drawable.getGL().getGL2();
//if( height lt;=0 ) 
//height = 1; 
        final float h = ( float ) width / ( float ) height;
        gl.glViewport( 0, 0, width, height );
        gl.glMatrixMode( GL2.GL_PROJECTION );
        gl.glLoadIdentity();
        glu.gluPerspective( 45.0f, h, 1.0, 20.0 );
        gl.glMatrixMode( GL2.GL_MODELVIEW );
        gl.glLoadIdentity();

        }

    public static void main( String[] args ) {
        final GLProfile profile = GLProfile.get( GLProfile.GL2 );
        GLCapabilities capabilities = new GLCapabilities( profile );
// The canvas 
        final GLCanvas glcanvas = new GLCanvas( capabilities );
        Cube cube = new Cube();
        glcanvas.addGLEventListener( cube );
        glcanvas.setSize( 400, 400 );

        final JFrame frame = new JFrame ( " Multicolored cube" );
        frame.getContentPane().add( glcanvas );
        frame.setSize( frame.getContentPane().getPreferredSize() );
        frame.setVisible( true );
        final FPSAnimator animator = new FPSAnimator(glcanvas, 300,true);
        animator.start();
        frame.addMouseListener(new java.awt.event.MouseListener() {
            @Override
            public void mouseClicked(java.awt.event.MouseEvent e) {
                glcanvas.addGLEventListener( cube );
                frame.getContentPane().add(glcanvas);
            }
            @Override
            public void mousePressed(java.awt.event.MouseEvent e) {
            }
            @Override
            public void mouseReleased(java.awt.event.MouseEvent e) {
            }
            @Override
            public void mouseEntered(java.awt.event.MouseEvent e) {
            }
            @Override
            public void mouseExited(java.awt.event.MouseEvent e) {
            }

        });
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    }
}