/**************************************************************************** ** ** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). ** Contact: http://www.qt-project.org/legal ** ** This file is part of the documentation of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:FDL$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and Digia. For licensing terms and ** conditions see http://qt.digia.com/licensing. For further information ** use the contact form at http://qt.digia.com/contact-us. ** ** GNU Free Documentation License Usage ** Alternatively, this file may be used under the terms of the GNU Free ** Documentation License version 1.3 as published by the Free Software ** Foundation and appearing in the file included in the packaging of ** this file. Please review the following information to ensure ** the GNU Free Documentation License version 1.3 requirements ** will be met: http://www.gnu.org/copyleft/fdl.html. ** $QT_END_LICENSE$ ** ****************************************************************************/ /*! \title QtQuick Examples - Threading \example quick/threading \brief This is a collection of QML Multithreading examples. \image qml-threading-example.png Threaded ListModel contains a ListView and a ListModel. The ListModel is updated asynchronusly in another thread, and the results propagate back to the main thread. A timer requests updates from the worker thread periodically: \snippet examples/threading/threadedlistmodel/timedisplay.qml 0 Inside the worker thread, the ListModel is synchronized once the data is finished loading: \snippet examples/threading/threadedlistmodel/dataloader.js 0 WorkerScript contains an example of using a WorkerScript to offload expensive calculations into another thread. This keeps the UI from being blocked. This example calculates numbers in Pascal's Triangle, and not in a very optimal way, so it will often take several seconds to complete the calculation. By doing this in a WorkerScript in another thread, the UI is not blocked during this time. When the UI needs another value, a request is sent to the WorkerScript: \snippet examples/threading/workerscript/workerscript.qml 0 The workerscript then is free to take a really long time to calculate it: \snippet examples/threading/workerscript/workerscript.js 0 When it's done, the result returns to the main scene via the WorkerScript element: \snippet examples/threading/workerscript/workerscript.qml 1 */