source: trunk/examples/opengl/hellogl/glwidget.cpp@ 1168

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#include <QtGui>
#include <QtOpenGL>

#include <math.h>

#include "glwidget.h"
#include "qtlogo.h"

#ifndef GL_MULTISAMPLE
#define GL_MULTISAMPLE  0x809D
#endif

//! [0]
GLWidget::GLWidget(QWidget *parent)
    : QGLWidget(QGLFormat(QGL::SampleBuffers), parent)
{
    logo = 0;
    xRot = 0;
    yRot = 0;
    zRot = 0;

    qtGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0);
    qtPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0);
}
//! [0]

//! [1]
GLWidget::~GLWidget()
{
}
//! [1]

//! [2]
QSize GLWidget::minimumSizeHint() const
{
    return QSize(50, 50);
}
//! [2]

//! [3]
QSize GLWidget::sizeHint() const
//! [3] //! [4]
{
    return QSize(400, 400);
}
//! [4]

static void qNormalizeAngle(int &angle)
{
    while (angle < 0)
        angle += 360 * 16;
    while (angle > 360 * 16)
        angle -= 360 * 16;
}

//! [5]
void GLWidget::setXRotation(int angle)
{
    qNormalizeAngle(angle);
    if (angle != xRot) {
        xRot = angle;
        emit xRotationChanged(angle);
        updateGL();
    }
}
//! [5]

void GLWidget::setYRotation(int angle)
{
    qNormalizeAngle(angle);
    if (angle != yRot) {