1 files changed, 140 insertions, 0 deletions
diff --git a/doc/src/snippets/matrix/matrix.cpp b/doc/src/snippets/matrix/matrix.cpp
new file mode 100644
index 0000000000..c7eb0b5943
--- /dev/null
+++ b/doc/src/snippets/matrix/matrix.cpp
@@ -0,0 +1,140 @@
+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the documentation of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** You may use this file under the terms of the BSD license as follows:
+**
+** "Redistribution and use in source and binary forms, with or without
+** modification, are permitted provided that the following conditions are
+** met:
+**   * Redistributions of source code must retain the above copyright
+**     notice, this list of conditions and the following disclaimer.
+**   * Redistributions in binary form must reproduce the above copyright
+**     notice, this list of conditions and the following disclaimer in
+**     the documentation and/or other materials provided with the
+**     distribution.
+**   * Neither the name of Nokia Corporation and its Subsidiary(-ies) nor
+**     the names of its contributors may be used to endorse or promote
+**     products derived from this software without specific prior written
+**     permission.
+**
+** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#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();
+}