Long live Qt 4.5!

1 files changed, 266 insertions, 0 deletions

diff --git a/examples/opengl/hellogl/glwidget.cpp b/examples/opengl/hellogl/glwidget.cpp
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+++ b/examples/opengl/hellogl/glwidget.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
+** package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+#include <QtOpenGL>
+
+#include <math.h>
+
+#include "glwidget.h"
+
+//! [0]
+GLWidget::GLWidget(QWidget *parent)
+    : QGLWidget(parent)
+{
+    object = 0;
+    xRot = 0;
+    yRot = 0;
+    zRot = 0;
+
+    trolltechGreen = QColor::fromCmykF(0.40, 0.0, 1.0, 0.0);
+    trolltechPurple = QColor::fromCmykF(0.39, 0.39, 0.0, 0.0);
+}
+//! [0]
+
+//! [1]
+GLWidget::~GLWidget()
+{
+    makeCurrent();
+    glDeleteLists(object, 1);
+}
+//! [1]
+
+//! [2]
+QSize GLWidget::minimumSizeHint() const
+{
+    return QSize(50, 50);
+}
+//! [2]
+
+//! [3]
+QSize GLWidget::sizeHint() const
+//! [3] //! [4]
+{
+    return QSize(400, 400);
+}
+//! [4]
+
+//! [5]
+void GLWidget::setXRotation(int angle)
+{
+    normalizeAngle(&angle);
+    if (angle != xRot) {
+        xRot = angle;
+        emit xRotationChanged(angle);
+        updateGL();
+    }
+}
+//! [5]
+
+void GLWidget::setYRotation(int angle)
+{
+    normalizeAngle(&angle);
+    if (angle != yRot) {
+        yRot = angle;
+        emit yRotationChanged(angle);
+        updateGL();
+    }
+}
+
+void GLWidget::setZRotation(int angle)
+{
+    normalizeAngle(&angle);
+    if (angle != zRot) {
+        zRot = angle;
+        emit zRotationChanged(angle);
+        updateGL();
+    }
+}
+
+//! [6]
+void GLWidget::initializeGL()
+{
+    qglClearColor(trolltechPurple.dark());
+    object = makeObject();
+    glShadeModel(GL_FLAT);
+    glEnable(GL_DEPTH_TEST);
+    glEnable(GL_CULL_FACE);
+}
+//! [6]
+
+//! [7]
+void GLWidget::paintGL()
+{
+    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+    glLoadIdentity();
+    glTranslated(0.0, 0.0, -10.0);
+    glRotated(xRot / 16.0, 1.0, 0.0, 0.0);
+    glRotated(yRot / 16.0, 0.0, 1.0, 0.0);
+    glRotated(zRot / 16.0, 0.0, 0.0, 1.0);
+    glCallList(object);
+}
+//! [7]
+
+//! [8]
+void GLWidget::resizeGL(int width, int height)
+{
+    int side = qMin(width, height);
+    glViewport((width - side) / 2, (height - side) / 2, side, side);
+
+    glMatrixMode(GL_PROJECTION);
+    glLoadIdentity();
+    glOrtho(-0.5, +0.5, +0.5, -0.5, 4.0, 15.0);
+    glMatrixMode(GL_MODELVIEW);
+}
+//! [8]
+
+//! [9]
+void GLWidget::mousePressEvent(QMouseEvent *event)
+{
+    lastPos = event->pos();
+}
+//! [9]
+
+//! [10]
+void GLWidget::mouseMoveEvent(QMouseEvent *event)
+{
+    int dx = event->x() - lastPos.x();
+    int dy = event->y() - lastPos.y();
+
+    if (event->buttons() & Qt::LeftButton) {
+        setXRotation(xRot + 8 * dy);
+        setYRotation(yRot + 8 * dx);
+    } else if (event->buttons() & Qt::RightButton) {
+        setXRotation(xRot + 8 * dy);
+        setZRotation(zRot + 8 * dx);
+    }
+    lastPos = event->pos();
+}
+//! [10]
+
+GLuint GLWidget::makeObject()
+{
+    GLuint list = glGenLists(1);
+    glNewList(list, GL_COMPILE);
+
+    glBegin(GL_QUADS);
+
+    GLdouble x1 = +0.06;
+    GLdouble y1 = -0.14;
+    GLdouble x2 = +0.14;
+    GLdouble y2 = -0.06;
+    GLdouble x3 = +0.08;
+    GLdouble y3 = +0.00;
+    GLdouble x4 = +0.30;
+    GLdouble y4 = +0.22;
+
+    quad(x1, y1, x2, y2, y2, x2, y1, x1);
+    quad(x3, y3, x4, y4, y4, x4, y3, x3);
+
+    extrude(x1, y1, x2, y2);
+    extrude(x2, y2, y2, x2);
+    extrude(y2, x2, y1, x1);
+    extrude(y1, x1, x1, y1);
+    extrude(x3, y3, x4, y4);
+    extrude(x4, y4, y4, x4);
+    extrude(y4, x4, y3, x3);
+
+    const double Pi = 3.14159265358979323846;
+    const int NumSectors = 200;
+
+    for (int i = 0; i < NumSectors; ++i) {
+        double angle1 = (i * 2 * Pi) / NumSectors;
+        GLdouble x5 = 0.30 * sin(angle1);
+        GLdouble y5 = 0.30 * cos(angle1);
+        GLdouble x6 = 0.20 * sin(angle1);
+        GLdouble y6 = 0.20 * cos(angle1);
+
+        double angle2 = ((i + 1) * 2 * Pi) / NumSectors;
+        GLdouble x7 = 0.20 * sin(angle2);
+        GLdouble y7 = 0.20 * cos(angle2);
+        GLdouble x8 = 0.30 * sin(angle2);
+        GLdouble y8 = 0.30 * cos(angle2);
+
+        quad(x5, y5, x6, y6, x7, y7, x8, y8);
+
+        extrude(x6, y6, x7, y7);
+        extrude(x8, y8, x5, y5);
+    }
+
+    glEnd();
+
+    glEndList();
+    return list;
+}
+
+void GLWidget::quad(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2,
+                    GLdouble x3, GLdouble y3, GLdouble x4, GLdouble y4)
+{
+    qglColor(trolltechGreen);
+
+    glVertex3d(x1, y1, -0.05);
+    glVertex3d(x2, y2, -0.05);
+    glVertex3d(x3, y3, -0.05);
+    glVertex3d(x4, y4, -0.05);
+
+    glVertex3d(x4, y4, +0.05);
+    glVertex3d(x3, y3, +0.05);
+    glVertex3d(x2, y2, +0.05);
+    glVertex3d(x1, y1, +0.05);
+}
+
+void GLWidget::extrude(GLdouble x1, GLdouble y1, GLdouble x2, GLdouble y2)
+{
+    qglColor(trolltechGreen.dark(250 + int(100 * x1)));
+
+    glVertex3d(x1, y1, +0.05);
+    glVertex3d(x2, y2, +0.05);
+    glVertex3d(x2, y2, -0.05);
+    glVertex3d(x1, y1, -0.05);
+}
+
+void GLWidget::normalizeAngle(int *angle)
+{
+    while (*angle < 0)
+        *angle += 360 * 16;
+    while (*angle > 360 * 16)
+        *angle -= 360 * 16;
+}