<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <!-- mediaplayer-qml-dynamic.qdoc --> <title>Qt SCXML Media Player QML Example (Dynamic) | Qt SCXML 5.12.6</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtscxml-index.html">Qt SCXML</a></td><td ><a href="examples-qtscxml.html">Qt SCXML Examples</a></td><td >Qt SCXML Media Player QML Example (Dynamic)</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtscxml-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"> <div class="toc"> <h3><a name="toc">Contents</a></h3> <ul> <li class="level1"><a href="#running-the-example">Running the Example</a></li> <li class="level1"><a href="#using-the-ecmascript-data-model">Using the ECMAScript Data Model</a></li> <li class="level1"><a href="#dynamically-loading-the-state-machine">Dynamically Loading the State Machine</a></li> </ul> </div> <div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">Qt SCXML Media Player QML Example (Dynamic)</h1> <span class="subtitle"></span> <!-- $$$mediaplayer-qml-dynamic-brief --> <p>A Qt Quick application that sends data to and receives it from a dynamically loaded ECMAScript data model.</p> <!-- @@@mediaplayer-qml-dynamic --> <!-- $$$mediaplayer-qml-dynamic-description --> <div class="descr"> <a name="details"></a> <p class="centerAlign"><img src="images/mediaplayer.png" alt="" /></p><p><i>Media Player QML Example (Dynamic)</i> demonstrates how to access data from a dynamically loaded ECMAScript data model.</p> <p>The UI is created using Qt Quick.</p> <a name="running-the-example"></a> <h2 id="running-the-example">Running the Example</h2> <p>To run the example from Qt Creator, open the <b>Welcome</b> mode and select the example from <b>Examples</b>. For more information, visit Building and Running an Example.</p> <a name="using-the-ecmascript-data-model"></a> <h2 id="using-the-ecmascript-data-model">Using the ECMAScript Data Model</h2> <p>We specify the data model as a value of the <i>datamodel</i> attribute of the <code><scxml></code> element in <i>mediaplayer-common/mediaplayer.scxml</i>:</p> <pre class="cpp"> <scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" name="MediaPlayerStateMachine" initial="stopped" datamodel="ecmascript" > <datamodel> <data id="media"/> </datamodel> </pre> <a name="dynamically-loading-the-state-machine"></a> <h2 id="dynamically-loading-the-state-machine">Dynamically Loading the State Machine</h2> <p>We link against the Qt SCXML module by adding the following line to the example <i>.pro</i> file:</p> <pre class="cpp"> QT += qml scxml </pre> <p>We dynamically create the state machine in <i>mediaplayer-commonMediaplayer.qml</i>:</p> <pre class="cpp"> import QtScxml 5.8 Window { id: root property StateMachine stateMachine: scxmlLoader.stateMachine property alias source: scxmlLoader.source </pre> <p>Files:</p> <ul> <li><a href="qtscxml-mediaplayer-qml-dynamic-mediaplayer-qml-dynamic-cpp.html">mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.cpp</a></li> <li><a href="qtscxml-mediaplayer-qml-dynamic-mediaplayer-qml-dynamic-pro.html">mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.pro</a></li> <li><a href="qtscxml-mediaplayer-qml-dynamic-mediaplayer-qml-dynamic-qml.html">mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.qml</a></li> <li><a href="qtscxml-mediaplayer-qml-dynamic-mediaplayer-qml-dynamic-qrc.html">mediaplayer-qml-dynamic/mediaplayer-qml-dynamic.qrc</a></li> </ul> </div> <!-- @@@mediaplayer-qml-dynamic --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>