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diff --git a/examples/qml/tutorials/extending-qml-advanced/advanced5-Attached-properties/doc/advanced5-Attached-properties.rst b/examples/qml/tutorials/extending-qml-advanced/advanced5-Attached-properties/doc/advanced5-Attached-properties.rst new file mode 100644 index 000000000..14b4bddb0 --- /dev/null +++ b/examples/qml/tutorials/extending-qml-advanced/advanced5-Attached-properties/doc/advanced5-Attached-properties.rst @@ -0,0 +1,51 @@ +.. _qml-advanced-advanced5-attached-properties: + +Extending QML (advanced) - Attached Properties +============================================== + +This is the fifth of a series of 6 examples forming a tutorial using the +example of a birthday party to demonstrate some of the advanced features of +QML. + +The time has come for the host to send out invitations. To keep track of which +guests have responded to the invitation and when, we need somewhere to store +that information. Storing it in the ``BirthdayParty`` object iself would not +really fit. A better way would be to store the responses as attached objects to +the party object. + +First, we declare the ``BirthdayPartyAttached`` class which holds the guest reponses. + +.. literalinclude:: birthdayparty.py + :lineno-start: 16 + :lines: 16-32 + +And we attach it to the ``BirthdayParty`` class and define +``qmlAttachedProperties()`` to return the attached object. + +.. literalinclude:: birthdayparty.py + :lineno-start: 34 + :lines: 34-38 + +.. literalinclude:: birthdayparty.py + :lineno-start: 67 + :lines: 67-69 + +Now, attached objects can be used in the QML to hold the rsvp information of +the invited guests. + +.. literalinclude:: People/Main.qml + :lineno-start: 6 + :lines: 6-22 + +Finally, the information can be accessed in the following way. + +.. literalinclude:: main.py + :lineno-start: 36 + :lines: 36-39 + +The program outputs the following summary of the party to come:: + + "Jack Smith" is having a birthday! + He is inviting: + "Robert Campbell" RSVP date: "Wed Mar 1 2023" + "Leo Hodges" RSVP date: "Mon Mar 6 2023" |