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#define GL_CLAMP_TO_EDGE 0x812F

OpenGLWidget::OpenGLWidget(QWidget *parent) :
    QGLWidget(parent)
{
    setMouseTracking(true);

    QSettings settings("settings.conf", QSettings::IniFormat);
    Scale_frequency = settings.value(VER + "GUI/Scale_frequency", 0.395734).toFloat();
    Scale_dBm = settings.value(VER + "GUI/Scale_dBm", 34.4251).toFloat();
    Translate_frequency = settings.value(VER + "GUI/Translate_frequency", -3.72921).toFloat();
    Translate_dBm = settings.value(VER + "GUI/Translate_dBm", 12.1542).toFloat();

    timer = new QTimer(this);
    connect(timer, SIGNAL(timeout()), this, SLOT(updt()));
    timer->start(40.0);
}

OpenGLWidget::~OpenGLWidget()
{
  
}

void OpenGLWidget::initializeGL()
{
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    qglClearColor(QColor(100.0, 100.0, 100.0));
    // Light values and coordinates
    glEnable(GL_DEPTH_TEST);	// Hidden surface removal
    // Сглаживание точек
    glEnable(GL_POINT_SMOOTH);
    glHint(GL_POINT_SMOOTH_HINT, GL_NICEST);
   
    // Generate texture
    textureID[0] = bindTexture(QPixmap(QString("69383_1310988233_picture1.jpg")), GL_TEXTURE_2D);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
    glEnable(GL_TEXTURE_2D);
}

void OpenGLWidget::resizeGL(int nWidth, int nHeight)
{
    Client_Width = nWidth;
    Client_Height = nHeight;
    glViewport(0, 0, Client_Width, Client_Height);//set field of view
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0, Client_Width, 0, Client_Height, 1, - 1);
    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
}

void OpenGLWidget::paintGL()
{
    qglClearColor(QColor(100.0, 100.0, 100.0));
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    glOrtho(0, Client_Width, 0, Client_Height, 1, -1); //
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);

    glColor4f(1.0, 1.0, 1.0, 1.0);
    glBindTexture(GL_TEXTURE_2D, textureID[0]);
    glBegin (GL_QUADS);
        glTexCoord2f(0.0, 0.0); glVertex2f (0.0,          0.0);
        glTexCoord2f(1.0, 0.0); glVertex2f (128.0,       0.0);
        glTexCoord2f(1.0, 1.0); glVertex2f (128.0,       128.0);
        glTexCoord2f(0.0, 1.0); glVertex2f (0.0,          128.0);
    glEnd();

    swapBuffers();
}