Initial import from the monolithic Qt.

This is the beginning of revision history for this module. If you
want to look at revision history older than this, please refer to the
Qt Git wiki for how to use Git history grafting. At the time of
writing, this wiki is located here:

http://qt.gitorious.org/qt/pages/GitIntroductionWithQt

If you have already performed the grafting and you don't see any
history beyond this commit, try running "git log" with the "--follow"
argument.

Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12

8 files changed, 1007 insertions, 0 deletions

diff --git a/examples/widgets/tetrix/main.cpp b/examples/widgets/tetrix/main.cpp
new file mode 100644
index 0000000000..9a7dcf35e5
--- /dev/null
+++ b/examples/widgets/tetrix/main.cpp
@@ -0,0 +1,54 @@
+/****************************************************************************
+**
+** 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 examples 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 <stdlib.h>
+
+#include "tetrixwindow.h"
+
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    TetrixWindow window;
+    window.show();
+    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
+    return app.exec();
+}
diff --git a/examples/widgets/tetrix/tetrix.pro b/examples/widgets/tetrix/tetrix.pro
new file mode 100644
index 0000000000..10b3f66435
--- /dev/null
+++ b/examples/widgets/tetrix/tetrix.pro
@@ -0,0 +1,18 @@
+HEADERS       = tetrixboard.h \
+                tetrixpiece.h \
+                tetrixwindow.h
+SOURCES       = main.cpp \
+                tetrixboard.cpp \
+                tetrixpiece.cpp \
+                tetrixwindow.cpp
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/widgets/tetrix
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS tetrix.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/widgets/tetrix
+INSTALLS += target sources
+
+symbian {
+    TARGET.UID3 = 0xA000C606
+    include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
+}
diff --git a/examples/widgets/tetrix/tetrixboard.cpp b/examples/widgets/tetrix/tetrixboard.cpp
new file mode 100644
index 0000000000..1bb91ee3d7
--- /dev/null
+++ b/examples/widgets/tetrix/tetrixboard.cpp
@@ -0,0 +1,408 @@
+/****************************************************************************
+**
+** 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 examples 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 "tetrixboard.h"
+
+//! [0]
+TetrixBoard::TetrixBoard(QWidget *parent)
+    : QFrame(parent)
+{
+    setFrameStyle(QFrame::Panel | QFrame::Sunken);
+    setFocusPolicy(Qt::StrongFocus);
+    isStarted = false;
+    isPaused = false;
+    clearBoard();
+
+    nextPiece.setRandomShape();
+}
+//! [0]
+
+//! [1]
+void TetrixBoard::setNextPieceLabel(QLabel *label)
+{
+    nextPieceLabel = label;
+}
+//! [1]
+
+//! [2]
+QSize TetrixBoard::sizeHint() const
+{
+    return QSize(BoardWidth * 15 + frameWidth() * 2,
+                 BoardHeight * 15 + frameWidth() * 2);
+}
+
+QSize TetrixBoard::minimumSizeHint() const
+//! [2] //! [3]
+{
+    return QSize(BoardWidth * 5 + frameWidth() * 2,
+                 BoardHeight * 5 + frameWidth() * 2);
+}
+//! [3]
+
+//! [4]
+void TetrixBoard::start()
+{
+    if (isPaused)
+        return;
+
+    isStarted = true;
+    isWaitingAfterLine = false;
+    numLinesRemoved = 0;
+    numPiecesDropped = 0;
+    score = 0;
+    level = 1;
+    clearBoard();
+
+    emit linesRemovedChanged(numLinesRemoved);
+    emit scoreChanged(score);
+    emit levelChanged(level);
+
+    newPiece();
+    timer.start(timeoutTime(), this);
+}
+//! [4]
+
+//! [5]
+void TetrixBoard::pause()
+{
+    if (!isStarted)
+        return;
+
+    isPaused = !isPaused;
+    if (isPaused) {
+	timer.stop();
+    } else {
+	timer.start(timeoutTime(), this);
+    }
+    update();
+//! [5] //! [6]
+}
+//! [6]
+
+//! [7]
+void TetrixBoard::paintEvent(QPaintEvent *event)
+{
+    QFrame::paintEvent(event);
+
+    QPainter painter(this);
+    QRect rect = contentsRect();
+//! [7]
+
+    if (isPaused) {
+	painter.drawText(rect, Qt::AlignCenter, tr("Pause"));
+        return;
+    }
+
+//! [8]
+    int boardTop = rect.bottom() - BoardHeight*squareHeight();
+
+    for (int i = 0; i < BoardHeight; ++i) {
+        for (int j = 0; j < BoardWidth; ++j) {
+            TetrixShape shape = shapeAt(j, BoardHeight - i - 1);
+	    if (shape != NoShape)
+                drawSquare(painter, rect.left() + j * squareWidth(),
+                           boardTop + i * squareHeight(), shape);
+        }
+//! [8] //! [9]
+    }
+//! [9]
+
+//! [10]
+    if (curPiece.shape() != NoShape) {
+        for (int i = 0; i < 4; ++i) {
+            int x = curX + curPiece.x(i);
+            int y = curY - curPiece.y(i);
+            drawSquare(painter, rect.left() + x * squareWidth(),
+                       boardTop + (BoardHeight - y - 1) * squareHeight(),
+                       curPiece.shape());
+        }
+//! [10] //! [11]
+    }
+//! [11] //! [12]
+}
+//! [12]
+
+//! [13]
+void TetrixBoard::keyPressEvent(QKeyEvent *event)
+{
+    if (!isStarted || isPaused || curPiece.shape() == NoShape) {
+	QFrame::keyPressEvent(event);
+        return;
+    }
+//! [13]
+
+//! [14]
+    switch (event->key()) {
+    case Qt::Key_Left:
+        tryMove(curPiece, curX - 1, curY);
+	break;
+    case Qt::Key_Right:
+        tryMove(curPiece, curX + 1, curY);
+	break;
+    case Qt::Key_Down:
+        tryMove(curPiece.rotatedRight(), curX, curY);
+	break;
+    case Qt::Key_Up:
+        tryMove(curPiece.rotatedLeft(), curX, curY);
+	break;
+    case Qt::Key_Space:
+	dropDown();
+	break;
+    case Qt::Key_D:
+	oneLineDown();
+	break;
+    default:
+	QFrame::keyPressEvent(event);
+    }
+//! [14]
+}
+
+//! [15]
+void TetrixBoard::timerEvent(QTimerEvent *event)
+{
+    if (event->timerId() == timer.timerId()) {
+        if (isWaitingAfterLine) {
+	    isWaitingAfterLine = false;
+	    newPiece();
+	    timer.start(timeoutTime(), this);
+        } else {
+            oneLineDown();
+        }
+    } else {
+        QFrame::timerEvent(event);
+//! [15] //! [16]
+    }
+//! [16] //! [17]
+}
+//! [17]
+
+//! [18]
+void TetrixBoard::clearBoard()
+{
+    for (int i = 0; i < BoardHeight * BoardWidth; ++i)
+        board[i] = NoShape;
+}
+//! [18]
+
+//! [19]
+void TetrixBoard::dropDown()
+{
+    int dropHeight = 0;
+    int newY = curY;
+    while (newY > 0) {
+        if (!tryMove(curPiece, curX, newY - 1))
+            break;
+        --newY;
+        ++dropHeight;
+    }
+    pieceDropped(dropHeight);
+//! [19] //! [20]
+}
+//! [20]
+
+//! [21]
+void TetrixBoard::oneLineDown()
+{
+    if (!tryMove(curPiece, curX, curY - 1))
+	pieceDropped(0);
+}
+//! [21]
+
+//! [22]
+void TetrixBoard::pieceDropped(int dropHeight)
+{
+    for (int i = 0; i < 4; ++i) {
+        int x = curX + curPiece.x(i);
+        int y = curY - curPiece.y(i);
+        shapeAt(x, y) = curPiece.shape();
+    }
+
+    ++numPiecesDropped;
+    if (numPiecesDropped % 25 == 0) {
+        ++level;
+        timer.start(timeoutTime(), this);
+        emit levelChanged(level);
+    }
+
+    score += dropHeight + 7;
+    emit scoreChanged(score);
+    removeFullLines();
+
+    if (!isWaitingAfterLine)
+        newPiece();
+//! [22] //! [23]
+}
+//! [23]
+
+//! [24]
+void TetrixBoard::removeFullLines()
+{
+    int numFullLines = 0;
+
+    for (int i = BoardHeight - 1; i >= 0; --i) {
+        bool lineIsFull = true;
+
+        for (int j = 0; j < BoardWidth; ++j) {
+            if (shapeAt(j, i) == NoShape) {
+                lineIsFull = false;
+                break;
+            }
+        }
+
+        if (lineIsFull) {
+//! [24] //! [25]
+	    ++numFullLines;
+	    for (int k = i; k < BoardHeight - 1; ++k) {
+                for (int j = 0; j < BoardWidth; ++j)
+                    shapeAt(j, k) = shapeAt(j, k + 1);
+	    }
+//! [25] //! [26]
+	    for (int j = 0; j < BoardWidth; ++j)
+                shapeAt(j, BoardHeight - 1) = NoShape;
+	}
+//! [26] //! [27]
+    }
+//! [27]
+
+//! [28]
+    if (numFullLines > 0) {
+	numLinesRemoved += numFullLines;
+	score += 10 * numFullLines;
+	emit linesRemovedChanged(numLinesRemoved);
+        emit scoreChanged(score);
+
+        timer.start(500, this);
+        isWaitingAfterLine = true;
+        curPiece.setShape(NoShape);
+        update();
+    }
+//! [28] //! [29]
+}
+//! [29]
+
+//! [30]
+void TetrixBoard::newPiece()
+{
+    curPiece = nextPiece;
+    nextPiece.setRandomShape();
+    showNextPiece();
+    curX = BoardWidth / 2 + 1;
+    curY = BoardHeight - 1 + curPiece.minY();
+
+    if (!tryMove(curPiece, curX, curY)) {
+	curPiece.setShape(NoShape);
+        timer.stop();
+        isStarted = false;
+    }
+//! [30] //! [31]
+}
+//! [31]
+
+//! [32]
+void TetrixBoard::showNextPiece()
+{
+    if (!nextPieceLabel)
+        return;
+
+    int dx = nextPiece.maxX() - nextPiece.minX() + 1;
+    int dy = nextPiece.maxY() - nextPiece.minY() + 1;
+
+    QPixmap pixmap(dx * squareWidth(), dy * squareHeight());
+    QPainter painter(&pixmap);
+    painter.fillRect(pixmap.rect(), nextPieceLabel->palette().background());
+
+    for (int i = 0; i < 4; ++i) {
+        int x = nextPiece.x(i) - nextPiece.minX();
+        int y = nextPiece.y(i) - nextPiece.minY();
+        drawSquare(painter, x * squareWidth(), y * squareHeight(),
+                   nextPiece.shape());
+    }
+    nextPieceLabel->setPixmap(pixmap);
+//! [32] //! [33]
+}
+//! [33]
+
+//! [34]
+bool TetrixBoard::tryMove(const TetrixPiece &newPiece, int newX, int newY)
+{
+    for (int i = 0; i < 4; ++i) {
+        int x = newX + newPiece.x(i);
+        int y = newY - newPiece.y(i);
+        if (x < 0 || x >= BoardWidth || y < 0 || y >= BoardHeight)
+            return false;
+        if (shapeAt(x, y) != NoShape)
+            return false;
+    }
+//! [34]
+
+//! [35]
+    curPiece = newPiece;
+    curX = newX;
+    curY = newY;
+    update();
+    return true;
+}
+//! [35]
+
+//! [36]
+void TetrixBoard::drawSquare(QPainter &painter, int x, int y, TetrixShape shape)
+{
+    static const QRgb colorTable[8] = {
+        0x000000, 0xCC6666, 0x66CC66, 0x6666CC,
+        0xCCCC66, 0xCC66CC, 0x66CCCC, 0xDAAA00
+    };
+
+    QColor color = colorTable[int(shape)];
+    painter.fillRect(x + 1, y + 1, squareWidth() - 2, squareHeight() - 2,
+                     color);
+
+    painter.setPen(color.light());
+    painter.drawLine(x, y + squareHeight() - 1, x, y);
+    painter.drawLine(x, y, x + squareWidth() - 1, y);
+
+    painter.setPen(color.dark());
+    painter.drawLine(x + 1, y + squareHeight() - 1,
+                     x + squareWidth() - 1, y + squareHeight() - 1);
+    painter.drawLine(x + squareWidth() - 1, y + squareHeight() - 1,
+                     x + squareWidth() - 1, y + 1);
+}
+//! [36]
diff --git a/examples/widgets/tetrix/tetrixboard.h b/examples/widgets/tetrix/tetrixboard.h
new file mode 100644
index 0000000000..4c06734469
--- /dev/null
+++ b/examples/widgets/tetrix/tetrixboard.h
@@ -0,0 +1,116 @@
+/****************************************************************************
+**
+** 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 examples 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TETRIXBOARD_H
+#define TETRIXBOARD_H
+
+#include <QBasicTimer>
+#include <QFrame>
+#include <QPointer>
+
+#include "tetrixpiece.h"
+
+QT_BEGIN_NAMESPACE
+class QLabel;
+QT_END_NAMESPACE
+
+//! [0]
+class TetrixBoard : public QFrame
+{
+    Q_OBJECT
+
+public:
+    TetrixBoard(QWidget *parent = 0);
+
+    void setNextPieceLabel(QLabel *label);
+    QSize sizeHint() const;
+    QSize minimumSizeHint() const;
+
+public slots:
+    void start();
+    void pause();
+
+signals:
+    void scoreChanged(int score);
+    void levelChanged(int level);
+    void linesRemovedChanged(int numLines);
+
+protected:
+    void paintEvent(QPaintEvent *event);
+    void keyPressEvent(QKeyEvent *event);
+    void timerEvent(QTimerEvent *event);
+//! [0]
+
+//! [1]
+private:
+    enum { BoardWidth = 10, BoardHeight = 22 };
+
+    TetrixShape &shapeAt(int x, int y) { return board[(y * BoardWidth) + x]; }
+    int timeoutTime() { return 1000 / (1 + level); }
+    int squareWidth() { return contentsRect().width() / BoardWidth; }
+    int squareHeight() { return contentsRect().height() / BoardHeight; }
+    void clearBoard();
+    void dropDown();
+    void oneLineDown();
+    void pieceDropped(int dropHeight);
+    void removeFullLines();
+    void newPiece();
+    void showNextPiece();
+    bool tryMove(const TetrixPiece &newPiece, int newX, int newY);
+    void drawSquare(QPainter &painter, int x, int y, TetrixShape shape);
+
+    QBasicTimer timer;
+    QPointer<QLabel> nextPieceLabel;
+    bool isStarted;
+    bool isPaused;
+    bool isWaitingAfterLine;
+    TetrixPiece curPiece;
+    TetrixPiece nextPiece;
+    int curX;
+    int curY;
+    int numLinesRemoved;
+    int numPiecesDropped;
+    int score;
+    int level;
+    TetrixShape board[BoardWidth * BoardHeight];
+};
+//! [1]
+
+#endif
diff --git a/examples/widgets/tetrix/tetrixpiece.cpp b/examples/widgets/tetrix/tetrixpiece.cpp
new file mode 100644
index 0000000000..c06c904a01
--- /dev/null
+++ b/examples/widgets/tetrix/tetrixpiece.cpp
@@ -0,0 +1,145 @@
+/****************************************************************************
+**
+** 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 examples 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 <QtCore>
+
+#include <stdlib.h>
+
+#include "tetrixpiece.h"
+
+//! [0]
+void TetrixPiece::setRandomShape()
+{
+    setShape(TetrixShape(qrand() % 7 + 1));
+}
+//! [0]
+
+//! [1]
+void TetrixPiece::setShape(TetrixShape shape)
+{
+    static const int coordsTable[8][4][2] = {
+        { { 0, 0 },   { 0, 0 },   { 0, 0 },   { 0, 0 } },
+        { { 0, -1 },  { 0, 0 },   { -1, 0 },  { -1, 1 } },
+        { { 0, -1 },  { 0, 0 },   { 1, 0 },   { 1, 1 } },
+        { { 0, -1 },  { 0, 0 },   { 0, 1 },   { 0, 2 } },
+        { { -1, 0 },  { 0, 0 },   { 1, 0 },   { 0, 1 } },
+        { { 0, 0 },   { 1, 0 },   { 0, 1 },   { 1, 1 } },
+        { { -1, -1 }, { 0, -1 },  { 0, 0 },   { 0, 1 } },
+        { { 1, -1 },  { 0, -1 },  { 0, 0 },   { 0, 1 } }
+    };
+
+    for (int i = 0; i < 4 ; i++) {
+        for (int j = 0; j < 2; ++j)
+            coords[i][j] = coordsTable[shape][i][j];
+    }
+    pieceShape = shape;
+//! [1] //! [2]
+}
+//! [2]
+
+//! [3]
+int TetrixPiece::minX() const
+{
+    int min = coords[0][0];
+    for (int i = 1; i < 4; ++i)
+        min = qMin(min, coords[i][0]);
+    return min;
+}
+
+int TetrixPiece::maxX() const
+//! [3] //! [4]
+{
+    int max = coords[0][0];
+    for (int i = 1; i < 4; ++i)
+        max = qMax(max, coords[i][0]);
+    return max;
+}
+//! [4]
+
+//! [5]
+int TetrixPiece::minY() const
+{
+    int min = coords[0][1];
+    for (int i = 1; i < 4; ++i)
+        min = qMin(min, coords[i][1]);
+    return min;
+}
+
+int TetrixPiece::maxY() const
+//! [5] //! [6]
+{
+    int max = coords[0][1];
+    for (int i = 1; i < 4; ++i)
+        max = qMax(max, coords[i][1]);
+    return max;
+}
+//! [6]
+
+//! [7]
+TetrixPiece TetrixPiece::rotatedLeft() const
+{
+    if (pieceShape == SquareShape)
+        return *this;
+
+    TetrixPiece result;
+    result.pieceShape = pieceShape;
+    for (int i = 0; i < 4; ++i) {
+        result.setX(i, y(i));
+        result.setY(i, -x(i));
+    }
+//! [7]
+    return result;
+}
+
+//! [9]
+TetrixPiece TetrixPiece::rotatedRight() const
+{
+    if (pieceShape == SquareShape)
+        return *this;
+
+    TetrixPiece result;
+    result.pieceShape = pieceShape;
+    for (int i = 0; i < 4; ++i) {
+        result.setX(i, -y(i));
+        result.setY(i, x(i));
+    }
+//! [9]
+    return result;
+}
diff --git a/examples/widgets/tetrix/tetrixpiece.h b/examples/widgets/tetrix/tetrixpiece.h
new file mode 100644
index 0000000000..c28db43f8a
--- /dev/null
+++ b/examples/widgets/tetrix/tetrixpiece.h
@@ -0,0 +1,75 @@
+/****************************************************************************
+**
+** 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 examples 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TETRIXPIECE_H
+#define TETRIXPIECE_H
+
+enum TetrixShape { NoShape, ZShape, SShape, LineShape, TShape, SquareShape,
+                   LShape, MirroredLShape };
+
+//! [0]
+class TetrixPiece
+{
+public:
+    TetrixPiece() { setShape(NoShape); }
+
+    void setRandomShape();
+    void setShape(TetrixShape shape);
+
+    TetrixShape shape() const { return pieceShape; }
+    int x(int index) const { return coords[index][0]; }
+    int y(int index) const { return coords[index][1]; }
+    int minX() const;
+    int maxX() const;
+    int minY() const;
+    int maxY() const;
+    TetrixPiece rotatedLeft() const;
+    TetrixPiece rotatedRight() const;
+
+private:
+    void setX(int index, int x) { coords[index][0] = x; }
+    void setY(int index, int y) { coords[index][1] = y; }
+
+    TetrixShape pieceShape;
+    int coords[4][2];
+};
+//! [0]
+
+#endif
diff --git a/examples/widgets/tetrix/tetrixwindow.cpp b/examples/widgets/tetrix/tetrixwindow.cpp
new file mode 100644
index 0000000000..fccb4beff1
--- /dev/null
+++ b/examples/widgets/tetrix/tetrixwindow.cpp
@@ -0,0 +1,115 @@
+/****************************************************************************
+**
+** 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 examples 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 "tetrixboard.h"
+#include "tetrixwindow.h"
+
+//! [0]
+TetrixWindow::TetrixWindow()
+{
+    board = new TetrixBoard;
+//! [0]
+
+    nextPieceLabel = new QLabel;
+    nextPieceLabel->setFrameStyle(QFrame::Box | QFrame::Raised);
+    nextPieceLabel->setAlignment(Qt::AlignCenter);
+    board->setNextPieceLabel(nextPieceLabel);
+
+//! [1]
+    scoreLcd = new QLCDNumber(5);
+    scoreLcd->setSegmentStyle(QLCDNumber::Filled);
+//! [1]
+    levelLcd = new QLCDNumber(2);
+    levelLcd->setSegmentStyle(QLCDNumber::Filled);
+    linesLcd = new QLCDNumber(5);
+    linesLcd->setSegmentStyle(QLCDNumber::Filled);
+
+//! [2]
+    startButton = new QPushButton(tr("&Start"));
+    startButton->setFocusPolicy(Qt::NoFocus);
+    quitButton = new QPushButton(tr("&Quit"));
+    quitButton->setFocusPolicy(Qt::NoFocus);
+    pauseButton = new QPushButton(tr("&Pause"));
+//! [2] //! [3]
+    pauseButton->setFocusPolicy(Qt::NoFocus);
+//! [3] //! [4]
+
+    connect(startButton, SIGNAL(clicked()), board, SLOT(start()));
+//! [4] //! [5]
+    connect(quitButton , SIGNAL(clicked()), qApp, SLOT(quit()));
+    connect(pauseButton, SIGNAL(clicked()), board, SLOT(pause()));
+    connect(board, SIGNAL(scoreChanged(int)), scoreLcd, SLOT(display(int)));
+    connect(board, SIGNAL(levelChanged(int)), levelLcd, SLOT(display(int)));
+    connect(board, SIGNAL(linesRemovedChanged(int)),
+            linesLcd, SLOT(display(int)));
+//! [5]
+
+//! [6]
+    QGridLayout *layout = new QGridLayout;
+    layout->addWidget(createLabel(tr("NEXT")), 0, 0);
+    layout->addWidget(nextPieceLabel, 1, 0);
+    layout->addWidget(createLabel(tr("LEVEL")), 2, 0);
+    layout->addWidget(levelLcd, 3, 0);
+    layout->addWidget(startButton, 4, 0);
+    layout->addWidget(board, 0, 1, 6, 1);
+    layout->addWidget(createLabel(tr("SCORE")), 0, 2);
+    layout->addWidget(scoreLcd, 1, 2);
+    layout->addWidget(createLabel(tr("LINES REMOVED")), 2, 2);
+    layout->addWidget(linesLcd, 3, 2);
+    layout->addWidget(quitButton, 4, 2);
+    layout->addWidget(pauseButton, 5, 2);
+    setLayout(layout);
+
+    setWindowTitle(tr("Tetrix"));
+    resize(550, 370);
+}
+//! [6]
+
+//! [7]
+QLabel *TetrixWindow::createLabel(const QString &text)
+{
+    QLabel *lbl = new QLabel(text);
+    lbl->setAlignment(Qt::AlignHCenter | Qt::AlignBottom);
+    return lbl;
+}
+//! [7]
+
diff --git a/examples/widgets/tetrix/tetrixwindow.h b/examples/widgets/tetrix/tetrixwindow.h
new file mode 100644
index 0000000000..6b0ec7b4f6
--- /dev/null
+++ b/examples/widgets/tetrix/tetrixwindow.h
@@ -0,0 +1,76 @@
+/****************************************************************************
+**
+** 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 examples 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."
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef TETRIXWINDOW_H
+#define TETRIXWINDOW_H
+
+#include <QFrame>
+#include <QWidget>
+
+QT_BEGIN_NAMESPACE
+class QLCDNumber;
+class QLabel;
+class QPushButton;
+QT_END_NAMESPACE
+class TetrixBoard;
+
+//! [0]
+class TetrixWindow : public QWidget
+{
+    Q_OBJECT
+
+public:
+    TetrixWindow();
+
+private:
+    QLabel *createLabel(const QString &text);
+
+    TetrixBoard *board;
+    QLabel *nextPieceLabel;
+    QLCDNumber *scoreLcd;
+    QLCDNumber *levelLcd;
+    QLCDNumber *linesLcd;
+    QPushButton *startButton;
+    QPushButton *quitButton;
+    QPushButton *pauseButton;
+};
+//! [0]
+
+#endif