Problems with KeyListener and JOGL - input

Question

I'm trying to bind a key to translate a GL_QUAD around the screen. I created a class, as I will attach below, that implements KeyListener, and within that I have a method that upon the keypress of 'd', adds 0.1 to the x coordinates of the quad vertices. Now, I have two questions relating to this.
Firstly, it doesn't seem to do anything. Upon the keypress, nothing happens to the object.
Is there a better way to achieve what I am trying to do? My end goal is to eventually end up with a sprite, that the camera is focused upon, that can move around a visually 2D game world.
Thanks for your time.
Code:
SpriteTest.java
package com.mangostudios.spritetest;
import java.awt.Frame;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLProfile;
import javax.media.opengl.awt.GLCanvas;
import com.jogamp.opengl.util.FPSAnimator;
public class SpriteTest
{
public static void main(String[] args) {
GLProfile glp = GLProfile.getDefault();
GLCapabilities caps = new GLCapabilities(glp);
GLCanvas canvas = new GLCanvas(caps);
Frame frame = new Frame("AWT Window Test");
frame.setSize(300, 300);
frame.add(canvas);
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
canvas.addGLEventListener(new Renderer());
FPSAnimator animator = new FPSAnimator(canvas, 60);
//animator.add(canvas);
animator.start();
}
}
Renderer.java
package com.mangostudios.spritetest;
import javax.media.opengl.GL2;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
public class Renderer implements GLEventListener {
InputListener input = new InputListener();
#Override
public void display(GLAutoDrawable drawable) {
update();
render(drawable);
}
#Override
public void dispose(GLAutoDrawable drawable) {
}
#Override
public void init(GLAutoDrawable drawable) {
}
#Override
public void reshape(GLAutoDrawable drawable, int x, int y, int w, int h) {
}
private void update() {
}
private void render(GLAutoDrawable drawable) {
GL2 gl = drawable.getGL().getGL2();
// draw a triangle filling the window
gl.glBegin(GL2.GL_QUADS);
gl.glVertex2f( input.xTran, 0.1f);
gl.glVertex2f( input.xTran,-0.1f);
gl.glVertex2f( -input.xTran, -0.1f);
gl.glVertex2f( -input.xTran, 0.1f);
gl.glEnd();
}
}
InputListener.java
package com.mangostudios.spritetest;
import com.jogamp.newt.event.KeyEvent;
import com.jogamp.newt.event.KeyListener;
public class InputListener implements KeyListener{
boolean loopBool = false;
float xTran = 0.1f;
float yTran = 0.1f;
#Override
public void keyPressed(KeyEvent d) {
loopBool = true;
while (loopBool = true) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
#Override
public void keyReleased(KeyEvent d) {
}
}

Answer 1

At first, you never call addKeyListener(). Secondly, you shouldn't put an infinite loop into keyPressed(). Thirdly, you use a NEWT KeyListener whereas you use an AWT GLCanvas :s Rather use GLWindow with a NEWT KeyListener or use an AWT GLCanvas with an AWT KeyListener or use NewtCanvasAWT. Finally, before writing your own example, try mine on Wikipedia in order to understand why it works.