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authorFriedemann Kleint <[email protected]>2023-04-28 16:46:23 +0200
committerFriedemann Kleint <[email protected]>2023-05-02 16:44:37 +0200
commit9e0da8e0288d4c87eaa6f8a22ec107e04d0cd305 (patch)
tree3cde2b2b667ebd58002a19894440c47cee0cdc8e /examples/qml/referenceexamples/properties/doc
parentfbb22873530c200b4ddb9b2da91764948bb9da71 (diff)
Move the QML reference examples around to match the structure in Qt
Adapt the tests accordingly. Task-number: PYSIDE-2206 Task-number: QTBUG-111033 Pick-to: 6.5 Change-Id: I332d6467da56b88ecbf9282d23092d8d47b730e0 Reviewed-by: Qt CI Bot <[email protected]> Reviewed-by: Shyamnath Premnadh <[email protected]>
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-.. _qml-object-and-list-property-types-example:
-
-Extending QML - Object and List Property Types Example
-======================================================
-
-Exporting C++ Properties.
-
-This example builds on :ref:`qml-adding-types-example`.
-
-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.
-
-import examples.properties.people
-
-.. code-block:: javascript
-
- BirthdayParty {
- host: Person {
- name: "Bob Jones"
- shoe_size: 12
- }
- guests: [
- Person { name: "Leo Hodges" },
- Person { name: "Jack Smith" },
- Person { name: "Anne Brown" }
- ]
- }
-
-Declare the BirthdayParty
--------------------------
-
-The BirthdayParty class is declared like this:
-
-.. code-block:: python
-
- from person import Person
-
-
- # To be used on the @QmlElement decorator
- # (QML_IMPORT_MINOR_VERSION is optional)
- QML_IMPORT_NAME = "People"
- QML_IMPORT_MAJOR_VERSION = 1
-
-
- @QmlElement
- class BirthdayParty(QObject):
-
- def __init__(self, parent=None):
- super().__init__(parent)
- self._host = None
- self._guests = []
-
- @Property(Person)
- def host(self):
- return self._host
-
- @host.setter
- def host(self, h):
- self._host = h
-
- def guest(self, n):
- return self._guests[n]
-
- def guestCount(self):
- return len(self._guests)
-
- def appendGuest(self, guest):
- self._guests.append(guest)
-
- guests = ListProperty(Person, appendGuest)
-
-The class contains a member to store the celebrant object, and also a
-list member storing the Person instances.
-
-In QML, the type of a list properties - and the guests property is a list of
-people - are all of type ListProperty. ListProperty is simple value
-type that contains a set of functions. QML calls these functions
-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.
-
-Running the Example
--------------------
-
-The main.py file in the example includes a simple shell application that
-loads and runs the QML snippet shown at the beginning of this page.