class Renderer(GLEeventListener):
    def __init__(self):
        self.rotation = 0.0
        self.rot_speed = 3.0
        
        self.gl = drawable.getGL()
        self.glDrawable = drawable
        self.drawable.setGL(DebugGL(self.gl))
        
    def display(self, arg0):
        gl = self.gl
        gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
        gl.glLoadIdentity()
        gl.glRotatef(self.rotation, 0.0, 1.0, 0.0)
        self.rotation += self.rot_speed
        gl.glBegin(GL.GL_TRIANGLES)
        
        gl.glColor3f(1.0, 0.0, 0.0)
        gl.glVertex2f(-0.5, -0.5)
        
        gl.glColor3f(0.0, 1.0, 0.0)
        gl.glVertex2f(0.5, -0.5)
        
        gl.glColor3f(0.0, 0.0, 1.0)
        gl.glVertex2f(0.0, 0.5)
        
        gl.glEnd()

    def reshape(self, drawable, x, y, width, height):
        pass
    
    def displayChanged(self, drawable, modeChanged, deviceChanged):
        pass