Qt SCXML 媒体播放器 QML 范例 (动态)

A Qt Quick application that sends data to and receives it from a dynamically loaded ECMAScript data model.

Media Player QML Example (Dynamic) demonstrates how to access data from a dynamically loaded ECMAScript data model.

UI 是使用 Qt Quick 创建的。

运行范例

要运行范例从 Qt Creator ，打开欢迎模式，然后选择范例从范例。更多信息，拜访构建和运行范例 .

使用 ECMAScript 数据模型

We specify the data model as a value of the datamodel 属性在 <scxml> element in mediaplayer-common/mediaplayer.scxml :

<scxml
    xmlns="http://www.w3.org/2005/07/scxml"
    version="1.0"
    name="MediaPlayerStateMachine"
    initial="stopped"
    datamodel="ecmascript"
>
    <datamodel>
        <data id="media"/>
    </datamodel>

动态加载状态机

We link against the Qt SCXML module by adding the following line to the project build files.

With qmake to the mediaplayer-qml-dynamic.pro

QT += qml scxml

With cmake to the CMakeLists.txt

find_package(Qt6 COMPONENTS Core Gui Qml Scxml)
target_link_libraries(mediaplayer-qml-dynamic PUBLIC
    Qt6::Core
    Qt6::Gui
    Qt6::Qml
    Qt6::Scxml
)

We dynamically create the state machine in mediaplayer-common\Mediaplayer.qml:

import QtScxml
Window {
    id: root
    property StateMachine stateMachine: scxmlLoader.stateMachine
    property alias source: scxmlLoader.source

范例工程 @ code.qt.io