void GLSingleView::paintGL()
{
    glDisable(GL_DEPTH_TEST);

    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();

    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();

    if (m_effectRunning && m_effectMethod) {
        (this->*m_effectMethod)();
    }
    else
        paintTexture();

    if (glGetError())
        std::cout << "Oops! I screwed up my OpenGL calls somewhere"
                  << std::endl;
}