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Branched from the monolithic repo, Qt master branch, at commit
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20 files changed, 1686 insertions, 0 deletions

diff --git a/examples/threads/README b/examples/threads/README
new file mode 100644
index 0000000000..e4b426f9c7
--- /dev/null
+++ b/examples/threads/README
@@ -0,0 +1,40 @@
+Qt 4 makes it easier than ever to write multithreaded applications. More
+classes have been made usable from non-GUI threads, and the signals and slots
+mechanism can now be used to communicate between threads.
+
+Additionally, it is now possible to move objects between threads.
+
+
+The example launcher provided with Qt can be used to explore each of the
+examples in this directory.
+
+Documentation for these examples can be found via the Tutorial and Examples
+link in the main Qt documentation.
+
+
+Finding the Qt Examples and Demos launcher
+==========================================
+
+On Windows:
+
+The launcher can be accessed via the Windows Start menu. Select the menu
+entry entitled "Qt Examples and Demos" entry in the submenu containing
+the Qt tools.
+
+On Mac OS X:
+
+For the binary distribution, the qtdemo executable is installed in the
+/Developer/Applications/Qt directory. For the source distribution, it is
+installed alongside the other Qt tools on the path specified when Qt is
+configured.
+
+On Unix/Linux:
+
+The qtdemo executable is installed alongside the other Qt tools on the path
+specified when Qt is configured.
+
+On all platforms:
+
+The source code for the launcher can be found in the demos/qtdemo directory
+in the Qt package. This example is built at the same time as the Qt libraries,
+tools, examples, and demonstrations.
diff --git a/examples/threads/mandelbrot/main.cpp b/examples/threads/mandelbrot/main.cpp
new file mode 100644
index 0000000000..610534d4a3
--- /dev/null
+++ b/examples/threads/mandelbrot/main.cpp
@@ -0,0 +1,53 @@
+/****************************************************************************
+**
+** 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 <QApplication>
+
+#include "mandelbrotwidget.h"
+
+//! [0]
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+    MandelbrotWidget widget;
+    widget.show();
+    return app.exec();
+}
+//! [0]
diff --git a/examples/threads/mandelbrot/mandelbrot.pro b/examples/threads/mandelbrot/mandelbrot.pro
new file mode 100644
index 0000000000..cffaefe525
--- /dev/null
+++ b/examples/threads/mandelbrot/mandelbrot.pro
@@ -0,0 +1,15 @@
+HEADERS       = mandelbrotwidget.h \
+                renderthread.h
+SOURCES       = main.cpp \
+                mandelbrotwidget.cpp \
+                renderthread.cpp
+
+unix:!mac:!symbian:!vxworks:!integrity:LIBS += -lm
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads/mandelbrot
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS mandelbrot.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads/mandelbrot
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
diff --git a/examples/threads/mandelbrot/mandelbrotwidget.cpp b/examples/threads/mandelbrot/mandelbrotwidget.cpp
new file mode 100644
index 0000000000..8dc1f5d811
--- /dev/null
+++ b/examples/threads/mandelbrot/mandelbrotwidget.cpp
@@ -0,0 +1,239 @@
+/****************************************************************************
+**
+** 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 <math.h>
+
+#include "mandelbrotwidget.h"
+
+//! [0]
+const double DefaultCenterX = -0.637011f;
+const double DefaultCenterY = -0.0395159f;
+const double DefaultScale = 0.00403897f;
+
+const double ZoomInFactor = 0.8f;
+const double ZoomOutFactor = 1 / ZoomInFactor;
+const int ScrollStep = 20;
+//! [0]
+
+//! [1]
+MandelbrotWidget::MandelbrotWidget(QWidget *parent)
+    : QWidget(parent)
+{
+    centerX = DefaultCenterX;
+    centerY = DefaultCenterY;
+    pixmapScale = DefaultScale;
+    curScale = DefaultScale;
+
+    qRegisterMetaType<QImage>("QImage");
+    connect(&thread, SIGNAL(renderedImage(QImage,double)),
+            this, SLOT(updatePixmap(QImage,double)));
+
+    setWindowTitle(tr("Mandelbrot"));
+#ifndef QT_NO_CURSOR
+    setCursor(Qt::CrossCursor);
+#endif
+    resize(550, 400);
+}
+//! [1]
+
+//! [2]
+void MandelbrotWidget::paintEvent(QPaintEvent * /* event */)
+{
+    QPainter painter(this);
+    painter.fillRect(rect(), Qt::black);
+
+    if (pixmap.isNull()) {
+        painter.setPen(Qt::white);
+        painter.drawText(rect(), Qt::AlignCenter,
+                         tr("Rendering initial image, please wait..."));
+//! [2] //! [3]
+        return;
+//! [3] //! [4]
+    }
+//! [4]
+
+//! [5]
+    if (curScale == pixmapScale) {
+//! [5] //! [6]
+        painter.drawPixmap(pixmapOffset, pixmap);
+//! [6] //! [7]
+    } else {
+//! [7] //! [8]
+        double scaleFactor = pixmapScale / curScale;
+        int newWidth = int(pixmap.width() * scaleFactor);
+        int newHeight = int(pixmap.height() * scaleFactor);
+        int newX = pixmapOffset.x() + (pixmap.width() - newWidth) / 2;
+        int newY = pixmapOffset.y() + (pixmap.height() - newHeight) / 2;
+
+        painter.save();
+        painter.translate(newX, newY);
+        painter.scale(scaleFactor, scaleFactor);
+        QRectF exposed = painter.matrix().inverted().mapRect(rect()).adjusted(-1, -1, 1, 1);
+        painter.drawPixmap(exposed, pixmap, exposed);
+        painter.restore();
+    }
+//! [8] //! [9]
+
+    QString text = tr("Use mouse wheel or the '+' and '-' keys to zoom. "
+                      "Press and hold left mouse button to scroll.");
+    QFontMetrics metrics = painter.fontMetrics();
+    int textWidth = metrics.width(text);
+
+    painter.setPen(Qt::NoPen);
+    painter.setBrush(QColor(0, 0, 0, 127));
+    painter.drawRect((width() - textWidth) / 2 - 5, 0, textWidth + 10,
+                     metrics.lineSpacing() + 5);
+    painter.setPen(Qt::white);
+    painter.drawText((width() - textWidth) / 2,
+                     metrics.leading() + metrics.ascent(), text);
+}
+//! [9]
+
+//! [10]
+void MandelbrotWidget::resizeEvent(QResizeEvent * /* event */)
+{
+    thread.render(centerX, centerY, curScale, size());
+}
+//! [10]
+
+//! [11]
+void MandelbrotWidget::keyPressEvent(QKeyEvent *event)
+{
+    switch (event->key()) {
+    case Qt::Key_Plus:
+        zoom(ZoomInFactor);
+        break;
+    case Qt::Key_Minus:
+        zoom(ZoomOutFactor);
+        break;
+    case Qt::Key_Left:
+        scroll(-ScrollStep, 0);
+        break;
+    case Qt::Key_Right:
+        scroll(+ScrollStep, 0);
+        break;
+    case Qt::Key_Down:
+        scroll(0, -ScrollStep);
+        break;
+    case Qt::Key_Up:
+        scroll(0, +ScrollStep);
+        break;
+    default:
+        QWidget::keyPressEvent(event);
+    }
+}
+//! [11]
+
+//! [12]
+void MandelbrotWidget::wheelEvent(QWheelEvent *event)
+{
+    int numDegrees = event->delta() / 8;
+    double numSteps = numDegrees / 15.0f;
+    zoom(pow(ZoomInFactor, numSteps));
+}
+//! [12]
+
+//! [13]
+void MandelbrotWidget::mousePressEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton)
+        lastDragPos = event->pos();
+}
+//! [13]
+
+//! [14]
+void MandelbrotWidget::mouseMoveEvent(QMouseEvent *event)
+{
+    if (event->buttons() & Qt::LeftButton) {
+        pixmapOffset += event->pos() - lastDragPos;
+        lastDragPos = event->pos();
+        update();
+    }
+}
+//! [14]
+
+//! [15]
+void MandelbrotWidget::mouseReleaseEvent(QMouseEvent *event)
+{
+    if (event->button() == Qt::LeftButton) {
+        pixmapOffset += event->pos() - lastDragPos;
+        lastDragPos = QPoint();
+
+        int deltaX = (width() - pixmap.width()) / 2 - pixmapOffset.x();
+        int deltaY = (height() - pixmap.height()) / 2 - pixmapOffset.y();
+        scroll(deltaX, deltaY);
+    }
+}
+//! [15]
+
+//! [16]
+void MandelbrotWidget::updatePixmap(const QImage &image, double scaleFactor)
+{
+    if (!lastDragPos.isNull())
+        return;
+
+    pixmap = QPixmap::fromImage(image);
+    pixmapOffset = QPoint();
+    lastDragPos = QPoint();
+    pixmapScale = scaleFactor;
+    update();
+}
+//! [16]
+
+//! [17]
+void MandelbrotWidget::zoom(double zoomFactor)
+{
+    curScale *= zoomFactor;
+    update();
+    thread.render(centerX, centerY, curScale, size());
+}
+//! [17]
+
+//! [18]
+void MandelbrotWidget::scroll(int deltaX, int deltaY)
+{
+    centerX += deltaX * curScale;
+    centerY += deltaY * curScale;
+    update();
+    thread.render(centerX, centerY, curScale, size());
+}
+//! [18]
diff --git a/examples/threads/mandelbrot/mandelbrotwidget.h b/examples/threads/mandelbrot/mandelbrotwidget.h
new file mode 100644
index 0000000000..5af3a8dffd
--- /dev/null
+++ b/examples/threads/mandelbrot/mandelbrotwidget.h
@@ -0,0 +1,84 @@
+/****************************************************************************
+**
+** 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 MANDELBROTWIDGET_H
+#define MANDELBROTWIDGET_H
+
+#include <QPixmap>
+#include <QWidget>
+
+#include "renderthread.h"
+
+//! [0]
+class MandelbrotWidget : public QWidget
+{
+    Q_OBJECT
+
+public:
+    MandelbrotWidget(QWidget *parent = 0);
+
+protected:
+    void paintEvent(QPaintEvent *event);
+    void resizeEvent(QResizeEvent *event);
+    void keyPressEvent(QKeyEvent *event);
+    void wheelEvent(QWheelEvent *event);
+    void mousePressEvent(QMouseEvent *event);
+    void mouseMoveEvent(QMouseEvent *event);
+    void mouseReleaseEvent(QMouseEvent *event);
+
+private slots:
+    void updatePixmap(const QImage &image, double scaleFactor);
+
+private:
+    void zoom(double zoomFactor);
+    void scroll(int deltaX, int deltaY);
+
+    RenderThread thread;
+    QPixmap pixmap;
+    QPoint pixmapOffset;
+    QPoint lastDragPos;
+    double centerX;
+    double centerY;
+    double pixmapScale;
+    double curScale;
+};
+//! [0]
+
+#endif
diff --git a/examples/threads/mandelbrot/renderthread.cpp b/examples/threads/mandelbrot/renderthread.cpp
new file mode 100644
index 0000000000..da89f99e5c
--- /dev/null
+++ b/examples/threads/mandelbrot/renderthread.cpp
@@ -0,0 +1,215 @@
+/****************************************************************************
+**
+** 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 <math.h>
+
+#include "renderthread.h"
+
+//! [0]
+RenderThread::RenderThread(QObject *parent)
+    : QThread(parent)
+{
+    restart = false;
+    abort = false;
+
+    for (int i = 0; i < ColormapSize; ++i)
+        colormap[i] = rgbFromWaveLength(380.0 + (i * 400.0 / ColormapSize));
+}
+//! [0]
+
+//! [1]
+RenderThread::~RenderThread()
+{
+    mutex.lock();
+    abort = true;
+    condition.wakeOne();
+    mutex.unlock();
+
+    wait();
+}
+//! [1]
+
+//! [2]
+void RenderThread::render(double centerX, double centerY, double scaleFactor,
+                          QSize resultSize)
+{
+    QMutexLocker locker(&mutex);
+
+    this->centerX = centerX;
+    this->centerY = centerY;
+    this->scaleFactor = scaleFactor;
+    this->resultSize = resultSize;
+
+    if (!isRunning()) {
+        start(LowPriority);
+    } else {
+        restart = true;
+        condition.wakeOne();
+    }
+}
+//! [2]
+
+//! [3]
+void RenderThread::run()
+{
+    forever {
+        mutex.lock();
+        QSize resultSize = this->resultSize;
+        double scaleFactor = this->scaleFactor;
+        double centerX = this->centerX;
+        double centerY = this->centerY;
+        mutex.unlock();
+//! [3]
+
+//! [4]
+        int halfWidth = resultSize.width() / 2;
+//! [4] //! [5]
+        int halfHeight = resultSize.height() / 2;
+        QImage image(resultSize, QImage::Format_RGB32);
+
+        const int NumPasses = 8;
+        int pass = 0;
+        while (pass < NumPasses) {
+            const int MaxIterations = (1 << (2 * pass + 6)) + 32;
+            const int Limit = 4;
+            bool allBlack = true;
+
+            for (int y = -halfHeight; y < halfHeight; ++y) {
+                if (restart)
+                    break;
+                if (abort)
+                    return;
+
+                uint *scanLine =
+                        reinterpret_cast<uint *>(image.scanLine(y + halfHeight));
+                double ay = centerY + (y * scaleFactor);
+
+                for (int x = -halfWidth; x < halfWidth; ++x) {
+                    double ax = centerX + (x * scaleFactor);
+                    double a1 = ax;
+                    double b1 = ay;
+                    int numIterations = 0;
+
+                    do {
+                        ++numIterations;
+                        double a2 = (a1 * a1) - (b1 * b1) + ax;
+                        double b2 = (2 * a1 * b1) + ay;
+                        if ((a2 * a2) + (b2 * b2) > Limit)
+                            break;
+
+                        ++numIterations;
+                        a1 = (a2 * a2) - (b2 * b2) + ax;
+                        b1 = (2 * a2 * b2) + ay;
+                        if ((a1 * a1) + (b1 * b1) > Limit)
+                            break;
+                    } while (numIterations < MaxIterations);
+
+                    if (numIterations < MaxIterations) {
+                        *scanLine++ = colormap[numIterations % ColormapSize];
+                        allBlack = false;
+                    } else {
+                        *scanLine++ = qRgb(0, 0, 0);
+                    }
+                }
+            }
+
+            if (allBlack && pass == 0) {
+                pass = 4;
+            } else {
+                if (!restart)
+                    emit renderedImage(image, scaleFactor);
+//! [5] //! [6]
+                ++pass;
+            }
+//! [6] //! [7]
+        }
+//! [7]
+
+//! [8]
+        mutex.lock();
+//! [8] //! [9]
+        if (!restart)
+            condition.wait(&mutex);
+        restart = false;
+        mutex.unlock();
+    }
+}
+//! [9]
+
+//! [10]
+uint RenderThread::rgbFromWaveLength(double wave)
+{
+    double r = 0.0;
+    double g = 0.0;
+    double b = 0.0;
+
+    if (wave >= 380.0 && wave <= 440.0) {
+        r = -1.0 * (wave - 440.0) / (440.0 - 380.0);
+        b = 1.0;
+    } else if (wave >= 440.0 && wave <= 490.0) {
+        g = (wave - 440.0) / (490.0 - 440.0);
+        b = 1.0;
+    } else if (wave >= 490.0 && wave <= 510.0) {
+        g = 1.0;
+        b = -1.0 * (wave - 510.0) / (510.0 - 490.0);
+    } else if (wave >= 510.0 && wave <= 580.0) {
+        r = (wave - 510.0) / (580.0 - 510.0);
+        g = 1.0;
+    } else if (wave >= 580.0 && wave <= 645.0) {
+        r = 1.0;
+        g = -1.0 * (wave - 645.0) / (645.0 - 580.0);
+    } else if (wave >= 645.0 && wave <= 780.0) {
+        r = 1.0;
+    }
+
+    double s = 1.0;
+    if (wave > 700.0)
+        s = 0.3 + 0.7 * (780.0 - wave) / (780.0 - 700.0);
+    else if (wave <  420.0)
+        s = 0.3 + 0.7 * (wave - 380.0) / (420.0 - 380.0);
+
+    r = pow(r * s, 0.8);
+    g = pow(g * s, 0.8);
+    b = pow(b * s, 0.8);
+    return qRgb(int(r * 255), int(g * 255), int(b * 255));
+}
+//! [10]
diff --git a/examples/threads/mandelbrot/renderthread.h b/examples/threads/mandelbrot/renderthread.h
new file mode 100644
index 0000000000..3370d9df4b
--- /dev/null
+++ b/examples/threads/mandelbrot/renderthread.h
@@ -0,0 +1,88 @@
+/****************************************************************************
+**
+** 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 RENDERTHREAD_H
+#define RENDERTHREAD_H
+
+#include <QMutex>
+#include <QSize>
+#include <QThread>
+#include <QWaitCondition>
+
+QT_BEGIN_NAMESPACE
+class QImage;
+QT_END_NAMESPACE
+
+//! [0]
+class RenderThread : public QThread
+{
+    Q_OBJECT
+
+public:
+    RenderThread(QObject *parent = 0);
+    ~RenderThread();
+
+    void render(double centerX, double centerY, double scaleFactor,
+                QSize resultSize);
+
+signals:
+    void renderedImage(const QImage &image, double scaleFactor);
+
+protected:
+    void run();
+
+private:
+    uint rgbFromWaveLength(double wave);
+
+    QMutex mutex;
+    QWaitCondition condition;
+    double centerX;
+    double centerY;
+    double scaleFactor;
+    QSize resultSize;
+    bool restart;
+    bool abort;
+
+    enum { ColormapSize = 512 };
+    uint colormap[ColormapSize];
+};
+//! [0]
+
+#endif
diff --git a/examples/threads/queuedcustomtype/block.cpp b/examples/threads/queuedcustomtype/block.cpp
new file mode 100644
index 0000000000..a4252cb258
--- /dev/null
+++ b/examples/threads/queuedcustomtype/block.cpp
@@ -0,0 +1,73 @@
+/****************************************************************************
+**
+** 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 <QColor>
+#include <QRect>
+#include "block.h"
+
+Block::Block()
+{
+}
+
+Block::Block(const Block &other)
+{
+    m_rect = other.m_rect;
+    m_color = other.m_color;
+}
+
+Block::~Block()
+{
+}
+
+Block::Block(const QRect &rect, const QColor &color)
+{
+    m_rect = rect;
+    m_color = color;
+}
+
+QColor Block::color() const
+{
+    return m_color;
+}
+
+QRect Block::rect() const
+{
+    return m_rect;
+}
diff --git a/examples/threads/queuedcustomtype/block.h b/examples/threads/queuedcustomtype/block.h
new file mode 100644
index 0000000000..1c37f82d0e
--- /dev/null
+++ b/examples/threads/queuedcustomtype/block.h
@@ -0,0 +1,70 @@
+/****************************************************************************
+**
+** 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 BLOCK_H
+#define BLOCK_H
+
+#include <QColor>
+#include <QDebug>
+#include <QMetaType>
+#include <QRect>
+
+//! [custom type definition and meta-type declaration]
+class Block
+{
+public:
+    Block();
+    Block(const Block &other);
+    ~Block();
+
+    Block(const QRect &rect, const QColor &color);
+
+    QColor color() const;
+    QRect rect() const;
+
+private:
+    QRect m_rect;
+    QColor m_color;
+};
+
+Q_DECLARE_METATYPE(Block);
+//! [custom type definition and meta-type declaration]
+
+#endif
diff --git a/examples/threads/queuedcustomtype/main.cpp b/examples/threads/queuedcustomtype/main.cpp
new file mode 100644
index 0000000000..d70a88a095
--- /dev/null
+++ b/examples/threads/queuedcustomtype/main.cpp
@@ -0,0 +1,128 @@
+/****************************************************************************
+**
+** 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 <QApplication>
+#include <QPainter>
+#include <QTime>
+#include "block.h"
+#include "window.h"
+
+QImage createImage(int width, int height)
+{
+    QImage image(width, height, QImage::Format_RGB16);
+    QPainter painter;
+    QPen pen;
+    pen.setStyle(Qt::NoPen);
+    QBrush brush(Qt::blue);
+
+    painter.begin(&image);
+    painter.fillRect(image.rect(), brush);
+    brush.setColor(Qt::white);
+    painter.setPen(pen);
+    painter.setBrush(brush);
+
+    static const QPointF points1[3] = {
+        QPointF(4, 4),
+        QPointF(7, 4),
+        QPointF(5.5, 1)
+    };
+
+    static const QPointF points2[3] = {
+        QPointF(1, 4),
+        QPointF(7, 4),
+        QPointF(10, 10)
+    };
+
+    static const QPointF points3[3] = {
+        QPointF(4, 4),
+        QPointF(10, 4),
+        QPointF(1, 10)
+    };
+
+    painter.setWindow(0, 0, 10, 10);
+
+    int x = 0;
+    int y = 0;
+    int starWidth = image.width()/3;
+    int starHeight = image.height()/3; 
+
+    QRect rect(x, y, starWidth, starHeight);
+
+    for (int i = 0; i < 9; ++i) {
+
+        painter.setViewport(rect);
+        painter.drawPolygon(points1, 3);
+        painter.drawPolygon(points2, 3);
+        painter.drawPolygon(points3, 3);
+
+        if (i % 3 == 2) {
+            y = y + starHeight;
+            rect.moveTop(y);
+
+            x = 0;
+            rect.moveLeft(x);
+
+        } else {
+            x = x + starWidth;
+            rect.moveLeft(x);
+        }
+    }
+
+    painter.end();
+    return image;
+}
+
+//! [main function] //! [main start]
+int main(int argc, char *argv[])
+{
+    QApplication app(argc, argv);
+//! [main start] //! [register meta-type for queued communications]
+    qRegisterMetaType<Block>();
+//! [register meta-type for queued communications]
+    qsrand(QTime::currentTime().elapsed());
+
+    Window window;
+    window.show();
+
+    window.loadImage(createImage(256, 256));
+//! [main finish]
+    return app.exec();
+}
+//! [main finish] //! [main function]
diff --git a/examples/threads/queuedcustomtype/queuedcustomtype.pro b/examples/threads/queuedcustomtype/queuedcustomtype.pro
new file mode 100644
index 0000000000..6f39121df7
--- /dev/null
+++ b/examples/threads/queuedcustomtype/queuedcustomtype.pro
@@ -0,0 +1,7 @@
+HEADERS   = block.h \
+            renderthread.h \
+            window.h
+SOURCES   = main.cpp \
+            block.cpp \
+            renderthread.cpp \
+            window.cpp
diff --git a/examples/threads/queuedcustomtype/renderthread.cpp b/examples/threads/queuedcustomtype/renderthread.cpp
new file mode 100644
index 0000000000..a44ac2315a
--- /dev/null
+++ b/examples/threads/queuedcustomtype/renderthread.cpp
@@ -0,0 +1,109 @@
+/****************************************************************************
+**
+** 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 "renderthread.h"
+
+RenderThread::RenderThread(QObject *parent)
+    : QThread(parent)
+{
+    m_abort = false;
+}
+
+RenderThread::~RenderThread()
+{
+    mutex.lock();
+    m_abort = true;
+    mutex.unlock();
+
+    wait();
+}
+
+//![processing the image (start)]
+void RenderThread::processImage(const QImage &image)
+{
+    if (image.isNull())
+        return;
+
+    m_image = image;
+    m_abort = false;
+    start();
+}
+
+void RenderThread::run()
+{
+    int size = qMax(m_image.width()/20, m_image.height()/20);
+    for (int s = size; s > 0; --s) {
+        for (int c = 0; c < 400; ++c) {
+//![processing the image (start)]
+            int x1 = qMax(0, (qrand() % m_image.width()) - s/2);
+            int x2 = qMin(x1 + s/2 + 1, m_image.width());
+            int y1 = qMax(0, (qrand() % m_image.height()) - s/2);
+            int y2 = qMin(y1 + s/2 + 1, m_image.height());
+            int n = 0;
+            int red = 0;
+            int green = 0;
+            int blue = 0;
+            for (int i = y1; i < y2; ++i) {
+                for (int j = x1; j < x2; ++j) {
+                    QRgb pixel = m_image.pixel(j, i);
+                    red += qRed(pixel);
+                    green += qGreen(pixel);
+                    blue += qBlue(pixel);
+                    n += 1;
+                }
+            }
+//![processing the image (finish)]
+            Block block(QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1),
+                        QColor(red/n, green/n, blue/n));
+            emit sendBlock(block);
+            if (m_abort)
+                return;
+            msleep(10);
+        }
+    }
+}
+//![processing the image (finish)]
+
+void RenderThread::stopProcess()
+{
+    mutex.lock();
+    m_abort = true;
+    mutex.unlock();
+}
diff --git a/examples/threads/queuedcustomtype/renderthread.h b/examples/threads/queuedcustomtype/renderthread.h
new file mode 100644
index 0000000000..99f72c3e01
--- /dev/null
+++ b/examples/threads/queuedcustomtype/renderthread.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 RENDERTHREAD_H
+#define RENDERTHREAD_H
+
+#include <QImage>
+#include <QMutex>
+#include <QThread>
+#include "block.h"
+
+//! [RenderThread class definition]
+class RenderThread : public QThread
+{
+    Q_OBJECT
+
+public:
+    RenderThread(QObject *parent = 0);
+    ~RenderThread();
+
+    void processImage(const QImage &image);
+
+signals:
+    void sendBlock(const Block &block);
+
+public slots:
+    void stopProcess();
+
+protected:
+    void run();
+
+private:
+    bool m_abort;
+    QImage m_image;
+    QMutex mutex;
+};
+//! [RenderThread class definition]
+
+#endif
diff --git a/examples/threads/queuedcustomtype/window.cpp b/examples/threads/queuedcustomtype/window.cpp
new file mode 100644
index 0000000000..367b75818f
--- /dev/null
+++ b/examples/threads/queuedcustomtype/window.cpp
@@ -0,0 +1,136 @@
+/****************************************************************************
+**
+** 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 "window.h"
+
+//! [Window constructor start]
+Window::Window()
+{
+    thread = new RenderThread();
+//! [Window constructor start] //! [set up widgets and connections]
+
+    label = new QLabel();
+    label->setAlignment(Qt::AlignCenter);
+
+    loadButton = new QPushButton(tr("&Load image..."));
+    resetButton = new QPushButton(tr("&Stop"));
+    resetButton->setEnabled(false);
+
+    connect(loadButton, SIGNAL(clicked()), this, SLOT(loadImage()));
+    connect(resetButton, SIGNAL(clicked()), thread, SLOT(stopProcess()));
+    connect(thread, SIGNAL(finished()), this, SLOT(resetUi()));
+//! [set up widgets and connections] //! [connecting signal with custom type]
+    connect(thread, SIGNAL(sendBlock(Block)), this, SLOT(addBlock(Block)));
+//! [connecting signal with custom type]
+
+    QHBoxLayout *buttonLayout = new QHBoxLayout();
+    buttonLayout->addStretch();
+    buttonLayout->addWidget(loadButton);
+    buttonLayout->addWidget(resetButton);
+    buttonLayout->addStretch();
+
+    QVBoxLayout *layout = new QVBoxLayout(this);
+    layout->addWidget(label);
+    layout->addLayout(buttonLayout);
+
+//! [Window constructor finish]
+    setWindowTitle(tr("Queued Custom Type"));
+}
+//! [Window constructor finish]
+
+void Window::loadImage()
+{
+    QStringList formats;
+    foreach (QByteArray format, QImageReader::supportedImageFormats())
+        if (format.toLower() == format)
+            formats.append("*." + format);
+
+    QString newPath = QFileDialog::getOpenFileName(this, tr("Open Image"),
+        path, tr("Image files (%1)").arg(formats.join(" ")));
+
+    if (newPath.isEmpty())
+        return;
+
+    QImage image(newPath);
+    if (!image.isNull()) {
+        loadImage(image);
+        path = newPath;
+    }
+}
+
+void Window::loadImage(const QImage &image)
+{
+    QDesktopWidget desktop;
+    QImage useImage;
+    QRect space = desktop.availableGeometry();
+    if (image.width() > 0.75*space.width() || image.height() > 0.75*space.height())
+        useImage = image.scaled(0.75*space.width(), 0.75*space.height(),
+                                Qt::KeepAspectRatio, Qt::SmoothTransformation);
+    else
+        useImage = image;
+
+    pixmap = QPixmap(useImage.width(), useImage.height());
+    pixmap.fill(qRgb(255, 255, 255));
+    label->setPixmap(pixmap);
+    loadButton->setEnabled(false);
+    resetButton->setEnabled(true);
+    thread->processImage(useImage);
+}
+
+//! [Adding blocks to the display]
+void Window::addBlock(const Block &block)
+{
+    QColor color = block.color();
+    color.setAlpha(64);
+
+    QPainter painter;
+    painter.begin(&pixmap);
+    painter.fillRect(block.rect(), color);
+    painter.end();
+    label->setPixmap(pixmap);
+}
+//! [Adding blocks to the display]
+
+void Window::resetUi()
+{
+    loadButton->setEnabled(true);
+    resetButton->setEnabled(false);
+}
diff --git a/examples/threads/queuedcustomtype/window.h b/examples/threads/queuedcustomtype/window.h
new file mode 100644
index 0000000000..539c240cd7
--- /dev/null
+++ b/examples/threads/queuedcustomtype/window.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 WINDOW_H
+#define WINDOW_H
+
+#include <QWidget>
+#include "renderthread.h"
+
+class QLabel;
+class QPushButton;
+
+//! [Window class definition]
+class Window : public QWidget
+{
+    Q_OBJECT
+
+public:
+    Window();
+    void loadImage(const QImage &image);
+
+public slots:
+    void addBlock(const Block &block);
+
+private slots:
+    void loadImage();
+    void resetUi();
+
+private:
+    QLabel *label;
+    QPixmap pixmap;
+    QPushButton *loadButton;
+    QPushButton *resetButton;
+    QString path;
+    RenderThread *thread;
+};
+//! [Window class definition]
+
+#endif
diff --git a/examples/threads/semaphores/semaphores.cpp b/examples/threads/semaphores/semaphores.cpp
new file mode 100644
index 0000000000..88630def09
--- /dev/null
+++ b/examples/threads/semaphores/semaphores.cpp
@@ -0,0 +1,106 @@
+/****************************************************************************
+**
+** 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 <stdio.h>
+#include <stdlib.h>
+
+//! [0]
+const int DataSize = 100000;
+const int BufferSize = 8192;
+char buffer[BufferSize];
+
+QSemaphore freeBytes(BufferSize);
+QSemaphore usedBytes;
+//! [0]
+
+//! [1]
+class Producer : public QThread
+//! [1] //! [2]
+{
+public:
+    void run();
+};
+
+void Producer::run()
+{
+    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
+    for (int i = 0; i < DataSize; ++i) {
+        freeBytes.acquire();
+        buffer[i % BufferSize] = "ACGT"[(int)qrand() % 4];
+        usedBytes.release();
+    }
+}
+//! [2]
+
+//! [3]
+class Consumer : public QThread
+//! [3] //! [4]
+{
+public:
+    void run();
+};
+
+void Consumer::run()
+{
+    for (int i = 0; i < DataSize; ++i) {
+        usedBytes.acquire();
+        fprintf(stderr, "%c", buffer[i % BufferSize]);
+        freeBytes.release();
+    }
+    fprintf(stderr, "\n");
+}
+//! [4]
+
+//! [5]
+int main(int argc, char *argv[])
+//! [5] //! [6]
+{
+    QCoreApplication app(argc, argv);
+    Producer producer;
+    Consumer consumer;
+    producer.start();
+    consumer.start();
+    producer.wait();
+    consumer.wait();
+    return 0;
+}
+//! [6]
diff --git a/examples/threads/semaphores/semaphores.pro b/examples/threads/semaphores/semaphores.pro
new file mode 100644
index 0000000000..027c65ca5e
--- /dev/null
+++ b/examples/threads/semaphores/semaphores.pro
@@ -0,0 +1,12 @@
+SOURCES += semaphores.cpp
+QT = core
+CONFIG -= app_bundle
+CONFIG += console
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads/semaphores
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS semaphores.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads/semaphores
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
diff --git a/examples/threads/threads.pro b/examples/threads/threads.pro
new file mode 100644
index 0000000000..e8f8c09ab9
--- /dev/null
+++ b/examples/threads/threads.pro
@@ -0,0 +1,13 @@
+TEMPLATE      = subdirs
+SUBDIRS       = semaphores \
+                waitconditions
+
+!contains(QT_CONFIG, no-gui):SUBDIRS += mandelbrot
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS threads.pro README
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)
diff --git a/examples/threads/waitconditions/waitconditions.cpp b/examples/threads/waitconditions/waitconditions.cpp
new file mode 100644
index 0000000000..5c8cb7149f
--- /dev/null
+++ b/examples/threads/waitconditions/waitconditions.cpp
@@ -0,0 +1,125 @@
+/****************************************************************************
+**
+** 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 <stdio.h>
+#include <stdlib.h>
+
+//! [0]
+const int DataSize = 100000;
+const int BufferSize = 8192;
+char buffer[BufferSize];
+
+QWaitCondition bufferNotEmpty;
+QWaitCondition bufferNotFull;
+QMutex mutex;
+int numUsedBytes = 0;
+//! [0]
+
+//! [1]
+class Producer : public QThread
+//! [1] //! [2]
+{
+public:
+    void run();
+};
+
+void Producer::run()
+{
+    qsrand(QTime(0,0,0).secsTo(QTime::currentTime()));
+    
+    for (int i = 0; i < DataSize; ++i) {
+        mutex.lock();
+        if (numUsedBytes == BufferSize)
+            bufferNotFull.wait(&mutex);
+        mutex.unlock();
+
+        buffer[i % BufferSize] = "ACGT"[(int)qrand() % 4];
+
+        mutex.lock();
+        ++numUsedBytes;
+        bufferNotEmpty.wakeAll();
+        mutex.unlock();
+    }
+}
+//! [2]
+
+//! [3]
+class Consumer : public QThread
+//! [3] //! [4]
+{
+public:
+    void run();
+};
+
+void Consumer::run()
+{
+    for (int i = 0; i < DataSize; ++i) {
+        mutex.lock();
+        if (numUsedBytes == 0)
+            bufferNotEmpty.wait(&mutex);
+        mutex.unlock();
+
+        fprintf(stderr, "%c", buffer[i % BufferSize]);
+
+        mutex.lock();
+        --numUsedBytes;
+        bufferNotFull.wakeAll();
+        mutex.unlock();
+    }
+    fprintf(stderr, "\n");
+}
+//! [4]
+
+//! [5]
+int main(int argc, char *argv[])
+//! [5] //! [6]
+{
+    QCoreApplication app(argc, argv);
+    Producer producer;
+    Consumer consumer;
+    producer.start();
+    consumer.start();
+    producer.wait();
+    consumer.wait();
+    return 0;
+}
+//! [6]
diff --git a/examples/threads/waitconditions/waitconditions.pro b/examples/threads/waitconditions/waitconditions.pro
new file mode 100644
index 0000000000..a2359c3d84
--- /dev/null
+++ b/examples/threads/waitconditions/waitconditions.pro
@@ -0,0 +1,21 @@
+######################################################################
+# Automatically generated by qmake (1.08a) Fri Jan 7 15:25:07 2005
+######################################################################
+
+TEMPLATE = app
+CONFIG -= moc app_bundle
+QT -= gui
+DEPENDPATH += .
+INCLUDEPATH += .
+
+# Input
+SOURCES += waitconditions.cpp
+CONFIG += qt warn_on create_prl link_prl console
+
+# install
+target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads/waitconditions
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS waitconditions.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/threads/waitconditions
+INSTALLS += target sources
+
+symbian: include($$QT_SOURCE_TREE/examples/symbianpkgrules.pri)