1 files changed, 141 insertions, 0 deletions
diff --git a/doc/src/snippets/matrix/matrix.cpp b/doc/src/snippets/matrix/matrix.cpp
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+++ b/doc/src/snippets/matrix/matrix.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 documentation 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 <cmath>
+
+class SimpleTransformation : public QWidget
+{
+    void paintEvent(QPaintEvent *);
+};
+
+//! [0]
+void SimpleTransformation::paintEvent(QPaintEvent *)
+{
+    QPainter painter(this);
+    painter.setPen(QPen(Qt::blue, 1, Qt::DashLine));
+    painter.drawRect(0, 0, 100, 100);
+
+    painter.rotate(45);
+
+    painter.setFont(QFont("Helvetica", 24));
+    painter.setPen(QPen(Qt::black, 1));
+    painter.drawText(20, 10, "QMatrix");
+}
+//! [0]
+
+class CombinedTransformation : public QWidget
+{
+    void paintEvent(QPaintEvent *);
+};
+
+//! [1]
+void CombinedTransformation::paintEvent(QPaintEvent *)
+{
+    QPainter painter(this);
+    painter.setPen(QPen(Qt::blue, 1, Qt::DashLine));
+    painter.drawRect(0, 0, 100, 100);
+
+    QMatrix matrix;
+    matrix.translate(50, 50);
+    matrix.rotate(45);
+    matrix.scale(0.5, 1.0);
+    painter.setMatrix(matrix);
+
+    painter.setFont(QFont("Helvetica", 24));
+    painter.setPen(QPen(Qt::black, 1));
+    painter.drawText(20, 10, "QMatrix");
+}
+//! [1]
+
+class BasicOperations : public QWidget
+{
+    void paintEvent(QPaintEvent *);
+};
+
+//! [2]
+void BasicOperations::paintEvent(QPaintEvent *)
+{
+    double pi = 3.14;
+
+    double a    = pi/180 * 45.0;
+    double sina = sin(a);
+    double cosa = cos(a);
+
+    QMatrix translationMatrix(1, 0, 0, 1, 50.0, 50.0);
+    QMatrix rotationMatrix(cosa, sina, -sina, cosa, 0, 0);
+    QMatrix scalingMatrix(0.5, 0, 0, 1.0, 0, 0);
+
+    QMatrix matrix;
+    matrix =  scalingMatrix * rotationMatrix * translationMatrix;
+
+    QPainter painter(this);
+    painter.setPen(QPen(Qt::blue, 1, Qt::DashLine));
+    painter.drawRect(0, 0, 100, 100);
+
+    painter.setMatrix(matrix);
+
+    painter.setFont(QFont("Helvetica", 24));
+    painter.setPen(QPen(Qt::black, 1));
+    painter.drawText(20, 10, "QMatrix");
+}
+//! [2]
+
+int main(int argc, char **argv)
+{
+    QApplication app(argc, argv);
+
+    QWidget widget;
+
+    SimpleTransformation *simpleWidget = new SimpleTransformation;
+    CombinedTransformation *combinedWidget = new CombinedTransformation;
+    BasicOperations *basicWidget = new BasicOperations;
+
+    QVBoxLayout *layout = new QVBoxLayout;
+    layout->addWidget(simpleWidget);
+    layout->addWidget(combinedWidget);
+    layout->addWidget(basicWidget);
+    widget.setLayout(layout);
+
+    widget.show();
+    widget.resize(130, 350);
+    return app.exec();
+}