Doc: Clean up threading examples

- Example 3 (Clock) is a collection of anti-patterns.
    - It implements a slot in a QThread subclass and then forces the new
      thread to use Qt::DirectConnection to invoke the slot in the
      "wrong" thread.
    - It talks about getting away with non-thread-safe usage
    - It uses a thread as a timer and then admits that it's an over-
      complicated approach.
- Example 4 (Permanent Thread) is over-complicated yet incomplete. A
  better one exists in the QThread class ref.
- Example 1 (Thread Pool) is covered by the QThreadPool class ref.
- Example 2 (QtConcurrent::run()) is covered in the "Threading and
  Concurrent Programming Examples" page and the "QtConcurrentRun" page.
- The undocumented "Hello Thread" example is covered in the QThread
  class ref.
- These examples cannot be accessed from Qt Creator's Examples tool.
- These examples are neither widget-related nor tutorials, contrary to
  their source paths.

Task-number: QTBUG-33360
Change-Id: Ic79cb764ee925ddbcbeafee8e1d01db7fe0f6cfe
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>

22 files changed, 4 insertions, 1067 deletions

diff --git a/examples/widgets/tutorials/threads/clock/clock.pro b/examples/widgets/tutorials/threads/clock/clock.pro
deleted file mode 100644
index 041c02bea8..0000000000
--- a/examples/widgets/tutorials/threads/clock/clock.pro
+++ /dev/null
@@ -1,10 +0,0 @@
-QT += widgets
-CONFIG += console
-TEMPLATE = app
-SOURCES += main.cpp \
-    clockthread.cpp
-HEADERS += clockthread.h
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/threads/clock
-INSTALLS += target
diff --git a/examples/widgets/tutorials/threads/clock/clockthread.cpp b/examples/widgets/tutorials/threads/clock/clockthread.cpp
deleted file mode 100644
index 5068a9b14a..0000000000
--- a/examples/widgets/tutorials/threads/clock/clockthread.cpp
+++ /dev/null
@@ -1,66 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 <QtWidgets>
-#include "clockthread.h"
-
- //This class starts another thread where it emits a signal for every new second.
-
-//! [1]
-// clock/clockthread.cpp
-void ClockThread::run()
-{
-    QTimer timer;
-    connect(&timer, SIGNAL(timeout()), this, SLOT(timerHit()), Qt::DirectConnection);
-    timer.setInterval(10);
-    timer.start();   // puts one event in the threads event queue
-    exec();
-    timer.stop();
-}
-
-void ClockThread::timerHit()
-{
-    QString newTime= QDateTime::currentDateTime().toString("ddd MMMM d yy, hh:mm:ss");
-    if(m_lastTime != newTime ){
-        m_lastTime = newTime;
-        emit sendTime(newTime) ;
-    }
-}
-//! [1]
diff --git a/examples/widgets/tutorials/threads/clock/clockthread.h b/examples/widgets/tutorials/threads/clock/clockthread.h
deleted file mode 100644
index 9d3b06ddd8..0000000000
--- a/examples/widgets/tutorials/threads/clock/clockthread.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 CLOCKTHREAD_H
-#define CLOCKTHREAD_H
-
-#include <QString>
-#include <QThread>
-
-
-
-//! [1]
-// clock/clockthread.h
-class ClockThread : public QThread
-{
-    Q_OBJECT
-signals:
-    void sendTime(QString time);
-private:
-    void run();
-    QString m_lastTime;
-private slots:
-    void timerHit();
-
-};
-//! [1]
-#endif // CLOCKTHREAD_H
\ No newline at end of file
diff --git a/examples/widgets/tutorials/threads/clock/main.cpp b/examples/widgets/tutorials/threads/clock/main.cpp
deleted file mode 100644
index f90318027c..0000000000
--- a/examples/widgets/tutorials/threads/clock/main.cpp
+++ /dev/null
@@ -1,67 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 <QtWidgets>
-#include "clockthread.h"
-
-//A clock that does time formatting in another thread
-
-//! [1]
-int main(int argc, char *argv[])
-{
-    QApplication app(argc, argv);
-    // build gui
-    QWidget widget;
-    QLabel *label = new QLabel;
-    QHBoxLayout *layout = new QHBoxLayout(&widget);
-    layout->addWidget(label);
-    widget.setWindowTitle("clock");
-
-    //instantiate thread object
-    ClockThread clockThread;
-    QObject::connect(&clockThread, SIGNAL(sendTime(QString)), label, SLOT(setText(QString)), Qt::QueuedConnection);
-    clockThread.start();
-    widget.show();
-    app.exec();
-    clockThread.quit();
-    clockThread.wait();
-    return 0;
-}
-//! [1]
diff --git a/examples/widgets/tutorials/threads/helloconcurrent/helloconcurrent.cpp b/examples/widgets/tutorials/threads/helloconcurrent/helloconcurrent.cpp
deleted file mode 100644
index 773c685ba0..0000000000
--- a/examples/widgets/tutorials/threads/helloconcurrent/helloconcurrent.cpp
+++ /dev/null
@@ -1,63 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 <QtConcurrent>
-
-/*
- says hello from main thread and secondary thread using QtConcurrent
-*/
-
-//! [1]
-// helloconcurrent/main.cpp
-void hello()
-{
-    qDebug() << "Hello from thread " << QThread::currentThread();
-}
-
-int main(int argc, char *argv[])
-{
-    QCoreApplication app(argc, argv);
-    QFuture<void> future = QtConcurrent::run(hello);
-    qDebug() << "hello from GUI thread " << QThread::currentThread();
-    future.waitForFinished();
-    return 0;
-}
-//! [1]
diff --git a/examples/widgets/tutorials/threads/helloconcurrent/helloconcurrent.pro b/examples/widgets/tutorials/threads/helloconcurrent/helloconcurrent.pro
deleted file mode 100644
index 7e6da1133c..0000000000
--- a/examples/widgets/tutorials/threads/helloconcurrent/helloconcurrent.pro
+++ /dev/null
@@ -1,14 +0,0 @@
-QT -= gui
-QT += concurrent
-
-CONFIG += console
-CONFIG -= app_bundle
-TEMPLATE = app
-SOURCES += helloconcurrent.cpp 
-   
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/threads/helloconcurrent
-INSTALLS += target
-
-
-
diff --git a/examples/widgets/tutorials/threads/hellothread/hellothread.cpp b/examples/widgets/tutorials/threads/hellothread/hellothread.cpp
deleted file mode 100644
index 1b5088e0db..0000000000
--- a/examples/widgets/tutorials/threads/hellothread/hellothread.cpp
+++ /dev/null
@@ -1,50 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 <QDebug>
-#include "hellothread.h"
-/*
- * demonstrates use of QThread, says hello in another thread and terminates
- */
-
-void HelloThread::run()
-{
-     qDebug() << "hello from worker thread " << thread()->currentThreadId();
-}
diff --git a/examples/widgets/tutorials/threads/hellothread/hellothread.h b/examples/widgets/tutorials/threads/hellothread/hellothread.h
deleted file mode 100644
index 281f2c6cb5..0000000000
--- a/examples/widgets/tutorials/threads/hellothread/hellothread.h
+++ /dev/null
@@ -1,53 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 HELLOTHREAD_H
-#define HELLOTHREAD_H
-
-#include <QThread>
-
-class HelloThread : public QThread
-{
-    Q_OBJECT
-private:
-    void run();
-};
-
-#endif // HELLOTHREAD_H
diff --git a/examples/widgets/tutorials/threads/hellothread/hellothread.pro b/examples/widgets/tutorials/threads/hellothread/hellothread.pro
deleted file mode 100644
index 40fd33b146..0000000000
--- a/examples/widgets/tutorials/threads/hellothread/hellothread.pro
+++ /dev/null
@@ -1,14 +0,0 @@
-QT -= gui
-
-CONFIG += console
-CONFIG -= app_bundle
-TEMPLATE = app
-SOURCES += main.cpp \
-    hellothread.cpp 
-HEADERS += hellothread.h 
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/threads/hellothread
-INSTALLS += target
-
-
diff --git a/examples/widgets/tutorials/threads/hellothread/main.cpp b/examples/widgets/tutorials/threads/hellothread/main.cpp
deleted file mode 100644
index 8b4b00874f..0000000000
--- a/examples/widgets/tutorials/threads/hellothread/main.cpp
+++ /dev/null
@@ -1,52 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 "hellothread.h"
-
-int main(int argc, char *argv[])
-{
-    QCoreApplication app(argc, argv);
-    HelloThread thread;
-    thread.start();
-    qDebug() << "hello from GUI thread " << app.thread()->currentThreadId();
-    thread.wait();  // do not exit before the thread is completed!
-    return 0;
-}
diff --git a/examples/widgets/tutorials/threads/hellothreadpool/hellothreadpool.cpp b/examples/widgets/tutorials/threads/hellothreadpool/hellothreadpool.cpp
deleted file mode 100644
index f904159fe4..0000000000
--- a/examples/widgets/tutorials/threads/hellothreadpool/hellothreadpool.cpp
+++ /dev/null
@@ -1,65 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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>
-// A hello world program to demonstrate the use of the global thread pool
-
-//! [1]
-// hellothreadpool/main.cpp
-class Work : public QRunnable
-{
-public:
-    void run()
-    {
-        qDebug() << "Hello from thread " << QThread::currentThread();
-    }
-};
-
-int main(int argc, char *argv[])
-{
-    QCoreApplication app(argc, argv);
-    Work work;
-    work.setAutoDelete(false);
-    QThreadPool *threadPool = QThreadPool::globalInstance();
-    threadPool->start(&work);
-    qDebug() << "hello from GUI thread " << QThread::currentThread();
-    threadPool->waitForDone();
-    return 0;
-}
-//! [1]
diff --git a/examples/widgets/tutorials/threads/hellothreadpool/hellothreadpool.pro b/examples/widgets/tutorials/threads/hellothreadpool/hellothreadpool.pro
deleted file mode 100644
index d5404a5134..0000000000
--- a/examples/widgets/tutorials/threads/hellothreadpool/hellothreadpool.pro
+++ /dev/null
@@ -1,14 +0,0 @@
-QT -= gui
-
-CONFIG += console
-CONFIG -= app_bundle  
-TEMPLATE = app
-SOURCES += hellothreadpool.cpp 
-   
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/threads/hellothreadpool
-INSTALLS += target
-
-
-
-
diff --git a/examples/widgets/tutorials/threads/movedobject/main.cpp b/examples/widgets/tutorials/threads/movedobject/main.cpp
deleted file mode 100644
index 2894707fda..0000000000
--- a/examples/widgets/tutorials/threads/movedobject/main.cpp
+++ /dev/null
@@ -1,69 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 "workerobject.h"
-#include "thread.h"
-
-/*
- * moves a class derived from QObject (WorkerObject) to another thread
- * and calls methods over thread boundaries.
- */
-
-//![1]
-// movedobject/main.cpp
-int main(int argc, char *argv[])
-{
-    QCoreApplication app(argc, argv);
-    Thread thread;
-    qDebug() << "main thread ID: " << app.thread()->currentThreadId();
-    WorkerObject *worker = new WorkerObject;
-    thread.launchWorker(worker);
-    QMetaObject::invokeMethod(worker, "doWork", Qt::QueuedConnection);
-    QMetaObject::invokeMethod(worker, "startPolling",  Qt::QueuedConnection,  Q_ARG(int, 500));
-    //let application produce output for 3 seconds and quit
-    QTimer::singleShot(3000, &app, SLOT(quit()));
-    app.exec();
-    thread.stop();
-    thread.wait();
-    delete worker;
-    return 0;
-}
-//![1]
diff --git a/examples/widgets/tutorials/threads/movedobject/movedobject.pro b/examples/widgets/tutorials/threads/movedobject/movedobject.pro
deleted file mode 100644
index b2ea7e5366..0000000000
--- a/examples/widgets/tutorials/threads/movedobject/movedobject.pro
+++ /dev/null
@@ -1,15 +0,0 @@
-QT += widgets
-CONFIG += console
-CONFIG -= app_bundle
-TEMPLATE = app
-SOURCES += main.cpp \
-    workerobject.cpp \
-    thread.cpp
-
-HEADERS += \
-    workerobject.h \
-    thread.h
-
-# install
-target.path = $$[QT_INSTALL_EXAMPLES]/widgets/tutorials/threads/movedobject
-INSTALLS += target
diff --git a/examples/widgets/tutorials/threads/movedobject/thread.cpp b/examples/widgets/tutorials/threads/movedobject/thread.cpp
deleted file mode 100644
index 2b6c2ffbd6..0000000000
--- a/examples/widgets/tutorials/threads/movedobject/thread.cpp
+++ /dev/null
@@ -1,100 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 "thread.h"
-
-/*
- * QThread derived class with additional capability to move a QObject to the
- * new thread, to stop the thread and move the QObject back to the thread where
- *it came from.
- */
-
-Thread::Thread( QObject *parent)
-    : QThread (parent)
-{
-    //we need a class that receives signals from other threads and emits a signal in response
-    shutDownHelper=new QSignalMapper;
-    shutDownHelper->setMapping(this,0);
-    connect(this, SIGNAL(started()), this, SLOT(setReadyStatus() ), Qt::DirectConnection);
-    connect(this, SIGNAL(aboutToStop()), shutDownHelper, SLOT(map()) );
-}
-
-//------------------------------------------------------
-Thread::~Thread()
-{
-    delete shutDownHelper;
-}
-
-//------------------------------------------------------
-// starts thread, moves worker to this thread and blocks
-void Thread::launchWorker(QObject *worker)
-{
-    this->worker = worker;
-    start();
-    worker->moveToThread(this);
-    shutDownHelper->moveToThread(this);
-    connect(shutDownHelper, SIGNAL(mapped(int) ), this, SLOT(stopExecutor()), Qt::DirectConnection );
-    mutex.lock();
-    waitCondition.wait(&mutex);
-}
-
-//------------------------------------------------------
-// puts a command to stop processing in the event queue of worker thread
-void Thread::stop()
-{
-    emit aboutToStop();
-}
-
-//------------------------------------------------------
-
-// methods above this line should be called in  gui thread context
-// methods below this line are private and will be run in  secondary thread context
-
-//------------------------------------------------------
-void Thread::stopExecutor()  //secondary thread context
-{
-    exit();
-}
-
-//------------------------------------------------------
-void Thread::setReadyStatus()
-{
-    waitCondition.wakeAll();
-}
diff --git a/examples/widgets/tutorials/threads/movedobject/thread.h b/examples/widgets/tutorials/threads/movedobject/thread.h
deleted file mode 100644
index e95d480ca8..0000000000
--- a/examples/widgets/tutorials/threads/movedobject/thread.h
+++ /dev/null
@@ -1,67 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 THREAD_H
-#define THREAD_H
-
-#include <QtCore>
-
-class Thread :public QThread
-{
-    Q_OBJECT
-public:
-    Thread( QObject *parent=0);
-    ~Thread();
-    void stop();
-    void launchWorker(QObject *worker);
-private:
-    QObject *worker;
-    QSignalMapper *shutDownHelper;
-    QWaitCondition waitCondition;
-    QMutex mutex;
-private slots:
-    void stopExecutor();
-    void setReadyStatus();
-signals:
-    void aboutToStop();
-};
-
-#endif // THREAD_H
diff --git a/examples/widgets/tutorials/threads/movedobject/workerobject.cpp b/examples/widgets/tutorials/threads/movedobject/workerobject.cpp
deleted file mode 100644
index a630042f9a..0000000000
--- a/examples/widgets/tutorials/threads/movedobject/workerobject.cpp
+++ /dev/null
@@ -1,87 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 "workerobject.h"
-
-/*
- * represents an object that lives in another thread where it polls a resource
- * and communicates with the gui thread
- */
-
-WorkerObject::WorkerObject(QObject *parent)
-    : QObject(parent)
-{
-    timer = new QTimer(this);
-    connect(timer, SIGNAL(timeout()), this, SLOT(poll()));
-}
-
-//---------------------------------------------------------------
-void WorkerObject::doWork()
-{
-
-    qDebug() << "doing work in thread " << thread()->currentThreadId() ;
-}
-
-//---------------------------------------------------------------
-WorkerObject::~WorkerObject()
-{
-    qDebug() << "destruction WorkerObject in thread " << thread()->currentThreadId();
-}
-
-//---------------------------------------------------------------
-void WorkerObject::startPolling(int milliseconds)
-{
-    count=0;
-    timer->start(milliseconds);
-}
-
-//---------------------------------------------------------------
-void WorkerObject::stopPolling()
-{
-    timer->stop();
-}
-
-//---------------------------------------------------------------
-void WorkerObject::poll()
-{
-    qDebug() << QString("timer hit %1").arg(count);
-    count++;
-}
-
diff --git a/examples/widgets/tutorials/threads/movedobject/workerobject.h b/examples/widgets/tutorials/threads/movedobject/workerobject.h
deleted file mode 100644
index 251a935282..0000000000
--- a/examples/widgets/tutorials/threads/movedobject/workerobject.h
+++ /dev/null
@@ -1,64 +0,0 @@
-/****************************************************************************
-**
-** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/legal
-**
-** 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 Digia Plc 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 WORKEROBJECT_H
-#define WORKEROBJECT_H
-
-#include <QtCore>
-
-class WorkerObject : public QObject
-{
-    Q_OBJECT
-public:
-    explicit WorkerObject(QObject *parent = 0);
-    ~WorkerObject();
-public slots:
-    void doWork();
-    void startPolling(int milliseconds);
-    void stopPolling();
-private slots:
-    void poll();
-private:
-    QTimer *timer;
-    int count;
-};
-
-#endif // WORKEROBJECT_H
diff --git a/examples/widgets/tutorials/threads/threads.pro b/examples/widgets/tutorials/threads/threads.pro
deleted file mode 100644
index 19718d760c..0000000000
--- a/examples/widgets/tutorials/threads/threads.pro
+++ /dev/null
@@ -1,8 +0,0 @@
-TEMPLATE = subdirs
-
-SUBDIRS = hellothread \
-          hellothreadpool \
-          clock \
-          movedobject 
-
-qtHaveModule(concurrent): SUBDIRS += helloconcurrent
diff --git a/examples/widgets/tutorials/tutorials.pro b/examples/widgets/tutorials/tutorials.pro
index cf94830551..2eb87cdbd5 100644
--- a/examples/widgets/tutorials/tutorials.pro
+++ b/examples/widgets/tutorials/tutorials.pro
@@ -1,2 +1,2 @@
 TEMPLATE = subdirs
-SUBDIRS +=  threads addressbook widgets modelview gettingStarted
+SUBDIRS +=  addressbook widgets modelview gettingStarted
diff --git a/src/corelib/doc/images/thread_clock.png b/src/corelib/doc/images/thread_clock.png
deleted file mode 100644
index b8a8aa0a39..0000000000
--- a/src/corelib/doc/images/thread_clock.png
+++ /dev/null
diff --git a/src/corelib/doc/src/threads-basics.qdoc b/src/corelib/doc/src/threads-basics.qdoc
index 4f381421b4..2206899460 100644
--- a/src/corelib/doc/src/threads-basics.qdoc
+++ b/src/corelib/doc/src/threads-basics.qdoc
@@ -219,130 +219,9 @@
 
     \section1 Examples
 
-    This tutorial comes with examples for Qt's three basic ways of working with
-    threads. Two more examples show how to communicate with a running thread
-    and how a QObject can be placed in another thread, providing service to the
-    main thread.
-
-    \list
-    \li Using QThread as shown \l{Qt thread basics}{above}
-    \li \l{Example 1: Using the Thread Pool}{Using the global QThreadPool}
-    \li \l{Example 2: Using QtConcurrent}{Using QtConcurrent}
-    \li \l{Example 3: Clock}{Communication with the GUI thread}
-    \li \l{Example 4: A Permanent Thread}{A permanent QObject in another thread
-       provides service to the main thread}
-    \endlist
-
-    The following examples can all be compiled and run independently. The source can
-    be found in the examples directory: examples/tutorials/threads/
-
-    \section2 Example 1: Using the Thread Pool
-
-    Creating and destroying threads frequently can be expensive. To avoid the
-    cost of thread creation, a thread pool can be used. A thread pool is a
-    place where threads can be parked and fetched. We can write the same
-    "hello thread" program as \l{Qt Thread Basics}{above} using the global
-    thread pool. We derive a class from QRunnable. The code we want to run in
-    another thread needs to be placed in the reimplemented QRunnable::run()
-    method.
-
-    \snippet ../widgets/tutorials/threads/hellothreadpool/hellothreadpool.cpp  1
-
-    We instantiate Work in main(), locate the global thread pool and use the
-    QThreadPool::start() method. Now the thread pool runs our worker in another
-    thread. Using the thread pool has a performance advantage because threads
-    are not destroyed after they have finished running. They are kept in a pool
-    and wait to be used again later.
-
-    \section2 Example 2: Using QtConcurrent
-
-    \snippet ../widgets/tutorials/threads/helloconcurrent/helloconcurrent.cpp  1
-
-    We write a global function hello() to implement the work. QtConcurrent::run()
-    is used to run the function in another thread. The result is a QFuture.
-    QFuture provides a method called \l{QFuture::}{waitForFinished()}, which
-    blocks until the calculation is completed. The real power of QtConcurrent
-    becomes visible when data can be made available in a container. QtConcurrent
-    provides several functions that are able to process itemized data on all
-    available cores simultaneously. The use of QtConcurrent is very similar to
-    applying an STL algorithm to an STL container.
-    \l{examples-threadandconcurrent.html}{QtConcurrent Map} is a very short and
-    clear example about how a container of images can be scaled on all available
-    cores. The image scaling example uses the blocking variants of the functions
-    used. For every blocking function there is also a non-blocking, asynchronous
-    counterpart. Getting results asynchronously is implemented with QFuture and
-    QFutureWatcher.
-
-    \section2 Example 3: Clock
-
-    \image thread_clock.png "clock"
-
-    We want to produce a clock application. The application has a GUI and a
-    worker thread. The worker thread checks every 10 milliseconds what time it
-    is. If the formatted time has changed, the result will be sent to the GUI
-    thread where it is displayed.
-
-    Of course, this is an overly complicated way of designing a clock and,
-    actually, a separate thread is unnecessary. We would be better off placing
-    the timer in the main thread because the calculation made in the timer slot
-    is very short-lived. This example is purely for instructional use and shows
-    how to communicate from a worker thread to a GUI thread. Note that
-    communication in this direction is easy. We only need to add a signal
-    to QThread and make a queued signal/slot connection to the main thread.
-    Communication from the GUI to the worker thread is shown in the next
-    example.
-
-    \snippet ../widgets/tutorials/threads/clock/main.cpp  1
-
-    We've connected the \c clockThread with the label. The connection must be a
-    queued signal-slot connection because we want to put the call in the event
-    loop.
-
-    \snippet ../widgets/tutorials/threads/clock/clockthread.h  1
-
-    We have derived a class from QThread and declared the \c sendTime() signal.
-
-    \snippet ../widgets/tutorials/threads/clock/clockthread.cpp  1
-
-    The trickiest part of this example is that the timer is connected to its
-    slot via a direct connection. A default connection would produce a queued
-    signal-slot connection because the connected objects live in different
-    threads; remember that QThread does not live in the thread it creates.
-
-    Still it is safe to access ClockThread::timerHit() from the worker thread
-    because ClockThread::timerHit() is private and only touches local variables
-    and a private member that isn't touched by public methods.
-    QDateTime::currentDateTime() isn't marked as thread-safe in Qt
-    documentation, however we can get away with using it in this small
-    example because we know that the QDateTime::currentDateTime() static
-    method isn't used in any other threads.
-
-    \section2 Example 4: A Permanent Thread
-
-    This example shows how it is possible to have a QObject in a worker thread
-    that accepts requests from the GUI thread, does polling using a timer and
-    continuously reports results back to the GUI thread. The actual work
-    including the polling must be implemented in a class derived from QObject.
-    We have called this class \c WorkerObject in the code shown below. The
-    thread-specific code is hidden in a class called \c Thread, derived from
-    QThread.
-    \c Thread has two additional public members. The \c launchWorker() member
-    takes the worker object and moves it to another thread with a started event
-    loop.
-    The call blocks for a very short moment until the thread creation operation
-    is completed, allowing the worker object to be used again on the next line.
-    The \c Thread class's code is short but somewhat involved, so we only show
-    how to use the class.
-
-    \snippet ../widgets/tutorials/threads/movedobject/main.cpp  1
-
-    QMetaObject::invokeMethod() calls a slot via the event loop. The worker
-    object's methods should not be called directly after the object has been
-    moved to another thread. We let the worker thread do some work and polling,
-    and use a timer to shut the application down after 3 seconds. Shutting the
-    worker down needs some care. We call \c{Thread::stop()} to exit the event
-    loop. We wait for the thread to terminate and, after this has occurred, we
-    delete the worker.
+    Qt comes with several examples for using threads. See the class references
+    for QThread and QThreadPool for simple examples. See the \l{Threading and
+    Concurrent Programming Examples} page for more advanced ones.
 
     \section1 Digging Deeper