diff options
Diffstat (limited to 'examples/widgets/tutorials/threads/movedobject')
6 files changed, 405 insertions, 0 deletions
diff --git a/examples/widgets/tutorials/threads/movedobject/main.cpp b/examples/widgets/tutorials/threads/movedobject/main.cpp new file mode 100644 index 0000000000..7a8da3a3df --- /dev/null +++ b/examples/widgets/tutorials/threads/movedobject/main.cpp @@ -0,0 +1,69 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 "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 new file mode 100644 index 0000000000..c7fd608c7e --- /dev/null +++ b/examples/widgets/tutorials/threads/movedobject/movedobject.pro @@ -0,0 +1,18 @@ +CONFIG += console +CONFIG -= app_bundle +TEMPLATE = app +SOURCES += main.cpp \ + workerobject.cpp \ + thread.cpp + +HEADERS += \ + workerobject.h \ + thread.h + +# install +target.path = $$[QT_INSTALL_EXAMPLES]/qtbase/tutorials/threads/movedobject +sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS movedobject.pro +sources.path = $$[QT_INSTALL_EXAMPLES]/qtbase/tutorials/threads/movedobject +INSTALLS += target sources + +QT += widgets diff --git a/examples/widgets/tutorials/threads/movedobject/thread.cpp b/examples/widgets/tutorials/threads/movedobject/thread.cpp new file mode 100644 index 0000000000..a53351e491 --- /dev/null +++ b/examples/widgets/tutorials/threads/movedobject/thread.cpp @@ -0,0 +1,100 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 "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 new file mode 100644 index 0000000000..77a76b7bb5 --- /dev/null +++ b/examples/widgets/tutorials/threads/movedobject/thread.h @@ -0,0 +1,67 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 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 new file mode 100644 index 0000000000..5f63086b80 --- /dev/null +++ b/examples/widgets/tutorials/threads/movedobject/workerobject.cpp @@ -0,0 +1,87 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 "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 new file mode 100644 index 0000000000..e19ab01bfb --- /dev/null +++ b/examples/widgets/tutorials/threads/movedobject/workerobject.h @@ -0,0 +1,64 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/ +** +** 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 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 |