援引动态加载嵌套状态机。
Invoke Example (Dynamic)
演示如何使用
<invoke>
element with generated nested state-machines, where the SCXML file is dynamically loaded. The
<invoke>
element is used to create an instance of an external service.
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 .
在 statemachine.scxml , we specify a state machine with the name 方向 类型 http://www.w3.org/TR/scxml/ to invoke:
<scxml xmlns="http://www.w3.org/2005/07/scxml" version="1.0" name="Directions" initial="anyplace" > <state id="anyplace"> <transition event="goNowhere" target="nowhere"/> <transition event="goSomewhere" target="somewhere"/> <state id="nowhere"/> <state id="somewhere"> <invoke type="http://www.w3.org/TR/scxml/"> <content> <scxml name="anywhere" version="1.0"> <state id="here"> <transition event="goThere" target="there"/> </state> <state id="there"> <transition event="goHere" target="here"/> </state> </scxml> </content> </invoke> </state> </state> </scxml>
We link against the Qt SCXML module by adding the following line to the invoke-dynamic.pro 文件:
QT += qml scxml
We dynamically create the state machine, as follows:
import QtScxml 5.8 MainView { stateMachine: directions.stateMachine StateMachineLoader { id: directions source: "qrc:///statemachine.scxml" }
文件: