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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
/*!
\example invoke
\title SCXML Invoke
\ingroup examples-qtscxml
\brief Invokes a compiled nested state machine.
\image invoke.png
\e{Invoke} demonstrates how to use the \c <invoke> element
with generated nested state-machines, where the SCXML file is compiled to
a C++ class. The \c <invoke> element is used to create an instance of an
external service.
\include examples-run.qdocinc
\section1 Invoking the State Machine
In \e statemachine.scxml, we specify a state machine with the name
\e Directions of type \e http://www.w3.org/TR/scxml/ to invoke:
\quotefromfile invoke/statemachine.scxml
\skipto scxml
\printuntil
\section1 Compiling the State Machine
We link against the Qt SCXML module by adding the following lines to the
example's build files.
\section2 \e invoke.pro when using qmake:
\quotefromfile invoke/invoke.pro
\skipto QT
\printline scxml
We then specify the state machine to compile:
\skipto STATECHARTS
\printline scxml
\section2 \e CMakeLists.txt when using cmake:
\quotefromfile invoke/CMakeLists.txt
\skipto find_package
\printline Scxml
\skipto target_link_libraries
\printuntil )
We then specify the state machine to compile:
\skipto qt6_add_statecharts
\printuntil )
The statechart directives \e STATECHARTS or \e qt6_add_statecharts invoke the Qt SCXML
Compiler, \c qscxmlc, which is run automatically to generate \e statemachine.h and
\e statemachine.cpp, which are then added appropriately as headers and sources for
compilation.
\section1 Instantiating the State Machine
We instantiate the generated \c Directions class in the \e invoke.cpp
file, as follows:
\quotefromfile invoke/invoke.cpp
\skipto statemachine.h
\printuntil }
*/
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