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-// Copyright (C) 2017 The Qt Company Ltd.
-// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
-
-/*!
-\example referenceexamples/adding
-\title Extending QML - Adding Types Example
-\brief Exporting C++ Classes.
-\ingroup qmlextendingexamples
-
-The Adding Types Example shows how to add a new object type, \c Person, to QML.
-The \c Person type can be used from QML like this:
-
-\snippet referenceexamples/adding/example.qml 0
-
-\section1 Declare the Person Class
-
-All QML types map to C++ types.  Here we declare a basic C++ Person class
-with the two properties we want accessible on the QML type - name and shoeSize.
-Although in this example we use the same name for the C++ class as the QML
-type, the C++ class can be named differently, or appear in a namespace.
-
-\snippet referenceexamples/adding/person.h 0
-
-\section1 Define the Person Class
-
-\snippet referenceexamples/adding/person.cpp 0
-
-The Person class implementation is quite basic.  The property accessors simply
-return members of the object instance.
-
-\section1 Running the Example
-
-The main.cpp file in the example includes a simple shell application that
-loads and runs the QML snippet shown at the beginning of this page.
-*/
-
-/*!
-\example referenceexamples/extended
-\title Extending QML - Extension Objects Example
-\brief Extension Objects.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-Shows how to use \l {QML_EXTENDED} to provide an
-\l {Registering Extension Objects}{extension object} to a \l QLineEdit without modifying or
-subclassing it.
-
-Firstly, the LineEditExtension class is registered with the QML system as an
-extension of QLineEdit. We declare a foreign type to do this as we cannot modify
-Qt's internal QLineEdit class.
-
-\snippet referenceexamples/extended/lineedit.h 0
-
-Note the usage of \l QML_NAMED_ELEMENT() instead of \l QML_ELEMENT.
-QML_ELEMENT uses the name of the containing type by default, "LineEditExtension" in this case.
-As the class being an extension class is an implementation detail, we choose the more natural name "LineEdit" instead
-
-The QML engine then instantiates a \l QLineEdit:
-
-\snippet referenceexamples/extended/main.cpp 1
-
-In QML, a property is set on the line edit that only exists in the LineEditExtension class:
-
-\snippet referenceexamples/extended/example.qml 0
-
-The extension type performs calls on the \l QLineEdit that otherwise will
-not be accessible to the QML engine.
-*/
-
-/*!
-\example referenceexamples/properties
-\title Extending QML - Object and List Property Types Example
-\brief Exporting C++ Properties.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-The Object and List Property Types example shows how to add object and list
-properties in QML.  This example adds a BirthdayParty type that specifies
-a birthday party, consisting of a celebrant and a list of guests.  People are
-specified using the People QML type built in the previous example.
-
-\snippet referenceexamples/properties/example.qml 0
-
-\section1 Declare the BirthdayParty
-
-The BirthdayParty class is declared like this:
-
-\snippet referenceexamples/properties/birthdayparty.h 0
-\snippet referenceexamples/properties/birthdayparty.h 1
-\snippet referenceexamples/properties/birthdayparty.h 2
-\snippet referenceexamples/properties/birthdayparty.h 3
-
-The class contains a member to store the celebrant object, and also a
-QList<Person *> member.
-
-In QML, the type of a list properties - and the guests property is a list of
-people - are all of type QQmlListProperty<T>.  QQmlListProperty is simple value
-type that contains a set of function pointers.  QML calls these function
-pointers whenever it needs to read from, write to or otherwise interact with
-the list.  In addition to concrete lists like the people list used in this
-example, the use of QQmlListProperty allows for "virtual lists" and other advanced
-scenarios.
-
-\section2 Define the BirthdayParty
-
-The implementation of BirthdayParty property accessors is straight forward.
-
-\snippet referenceexamples/properties/birthdayparty.cpp 0
-
-\section1 Running the Example
-
-The main.cpp file in the example includes a simple shell application that
-loads and runs the QML snippet shown at the beginning of this page.
-*/
-
-/*!
-\example referenceexamples/coercion
-\title Extending QML - Inheritance and Coercion Example
-\brief C++ Inheritance and Coercion.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-The Inheritance and Coercion Example shows how to use base classes to assign
-types of more than one type to a property.  It specializes the Person type
-developed in the previous examples into two types - a \c Boy and a \c Girl.
-
-\snippet referenceexamples/coercion/example.qml 0
-
-\section1 Declare Boy and Girl
-
-\snippet referenceexamples/coercion/person.h 1
-
-The Person class remains unaltered in this example and the Boy and Girl C++
-classes are trivial extensions of it. The types and their QML name are
-registered with the QML engine.
-
-As an example, the inheritance used here is a little contrived, but in real
-applications it is likely that the two extensions would add additional
-properties or modify the Person classes behavior.
-
-\section2 Define People as a Base Class
-
-The implementation of the People class itself has not changed since the
-previous example.  However, as we have repurposed the People class as a common
-base for Boy and Girl, we want to prevent it from being instantiated from QML
-directly - an explicit Boy or Girl should be instantiated instead.
-
-\snippet referenceexamples/coercion/person.h 0
-
-While we want to disallow instantiating Person from within QML, it still needs
-to be registered with the QML engine, so that it can be used as a property type
-and other types can be coerced to it. This is what the QML_UNCREATABLE macro
-does.
-
-\section1 Running the Example
-
-The BirthdayParty type has not changed since the previous example.  The
-celebrant and guests property still use the People type.
-
-\snippet referenceexamples/coercion/birthdayparty.h 0
-
-However, as all three types, Person, Boy and Girl, have been registered with the
-QML system, on assignment QML automatically (and type-safely) converts the Boy
-and Girl objects into a Person.
-
-The main.cpp file in the example includes a simple shell application that
-loads and runs the QML snippet shown at the beginning of this page.
-*/
-
-/*!
-\example referenceexamples/default
-\title Extending QML - Default Property Example
-\brief Default Property.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-The Default Property Example is a minor modification of the
-\l {Extending QML - Inheritance and Coercion Example} that simplifies the
-specification of a BirthdayParty through the use of a default property.
-
-\snippet referenceexamples/default/example.qml 0
-
-\section1 Declaring the BirthdayParty Class
-
-The only difference between this example and the last, is the addition of the
-\c DefaultProperty class info annotation.
-
-\snippet referenceexamples/default/birthdayparty.h 0
-
-The default property specifies the property to assign to whenever an explicit
-property is not specified, in the case of the BirthdayParty type the guest
-property.  It is purely a syntactic simplification, the behavior is identical
-to specifying the property by name, but it can add a more natural feel in many
-situations.  The default property must be either an object or list property.
-
-\section1 Running the Example
-
-The main.cpp file in the example includes a simple shell application that
-loads and runs the QML snippet shown at the beginning of this page.
-*/
-
-/*!
-\example referenceexamples/grouped
-\title Extending QML - Grouped Properties Example
-\brief Grouped Properties.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Default Property Example}
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-*/
-
-/*!
-\example referenceexamples/attached
-\title Extending QML - Attached Properties Example
-\brief Attached Properties.
-\ingroup qmlextendingexamples
-
-This example demonstrates how to create custom
-\l {Attached Properties and Attached Signal Handlers} {attached properties}.
-For a more in-depth description on how one can create attached properties,
-see \l {Providing Attached Properties}.
-
-
-This example builds on:
-\list
-\li \l {Extending QML - Grouped Properties Example}
-\li \l {Extending QML - Default Property Example}
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-*/
-
-/*!
-\example referenceexamples/signal
-\title Extending QML - Signal Support Example
-\brief Signal Support.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Attached Properties Example}
-\li \l {Extending QML - Grouped Properties Example}
-\li \l {Extending QML - Default Property Example}
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-*/
-
-/*!
-\example referenceexamples/methods
-\title Extending QML - Methods Example
-\brief Methods Support.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-The Methods Example has an additional method in the \c BirthdayParty class: \c invite().
-\c invite() is declared with \l Q_INVOKABLE so that it can be
-called from QML.
-
-\snippet referenceexamples/methods/birthdayparty.h 0
-
-In \c example.qml, the \c invite() method is called in the \l [QML]{QtQml::Component::completed()}{Component.onCompleted} signal handler:
-
-\snippet referenceexamples/methods/example.qml 0
-*/
-
-/*!
-\example referenceexamples/valuesource
-\title Extending QML - Property Value Source Example
-\brief Property Value Source.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Signal Support Example}
-\li \l {Extending QML - Attached Properties Example}
-\li \l {Extending QML - Grouped Properties Example}
-\li \l {Extending QML - Default Property Example}
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-*/
-
-/*!
-\example referenceexamples/binding
-\title Extending QML - Binding Example
-\brief Binding.
-\ingroup qmlextendingexamples
-
-This example builds on:
-\list
-\li \l {Extending QML - Property Value Source Example}
-\li \l {Extending QML - Signal Support Example}
-\li \l {Extending QML - Attached Properties Example}
-\li \l {Extending QML - Grouped Properties Example}
-\li \l {Extending QML - Default Property Example}
-\li \l {Extending QML - Inheritance and Coercion Example}
-\li \l {Extending QML - Object and List Property Types Example}
-\li \l {Extending QML - Adding Types Example}
-\endlist
-
-*/