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Diffstat (limited to 'sources/pyside6/doc/tutorials/qmlsqlintegration/qmlsqlintegration.rst')
| -rw-r--r-- | sources/pyside6/doc/tutorials/qmlsqlintegration/qmlsqlintegration.rst | 98 |
1 files changed, 48 insertions, 50 deletions
diff --git a/sources/pyside6/doc/tutorials/qmlsqlintegration/qmlsqlintegration.rst b/sources/pyside6/doc/tutorials/qmlsqlintegration/qmlsqlintegration.rst index 4c0131f32..eee3f807e 100644 --- a/sources/pyside6/doc/tutorials/qmlsqlintegration/qmlsqlintegration.rst +++ b/sources/pyside6/doc/tutorials/qmlsqlintegration/qmlsqlintegration.rst @@ -14,9 +14,9 @@ name of our table, and define the global function ``createTable()`` that creates doesn't already exist. The database contains a single line to mock the beginning of a conversation. - .. literalinclude:: sqlDialog.py - :linenos: - :lines: 3-42 +.. literalinclude:: sqlDialog.py + :linenos: + :lines: 4-43 The ``SqlConversationModel`` class offers the read-only data model required for the non-editable contacts list. It derives from the :ref:`QSqlQueryModel` class, which is the logical choice for @@ -26,25 +26,25 @@ Then, we proceed to create the table, set its name to the one defined previously We add the necessary attributes to the table, to have a program that reflects the idea of a chat application. - .. literalinclude:: sqlDialog.py - :linenos: - :lines: 46-58 +.. literalinclude:: sqlDialog.py + :linenos: + :lines: 47-59 In ``setRecipient()``, you set a filter over the returned results from the database, and emit a signal every time the recipient of the message changes. - .. literalinclude:: sqlDialog.py - :linenos: - :lines: 60-69 +.. literalinclude:: sqlDialog.py + :linenos: + :lines: 61-70 The ``data()`` function falls back to ``QSqlTableModel``'s implementation if the role is not a custom user role. If you get a user role, we can subtract :meth:`~.QtCore.Qt.UserRole` from it to get the index of that field, and then use that index to find the value to be returned. - .. literalinclude:: sqlDialog.py - :linenos: - :lines: 71-78 +.. literalinclude:: sqlDialog.py + :linenos: + :lines: 72-79 In ``roleNames()``, we return a Python dictionary with our custom role and role names as key-values @@ -53,27 +53,27 @@ Alternatively, it can be useful to declare an Enum to hold all of the role value Note that ``names`` has to be a hash to be used as a dictionary key, and that's why we're using the ``hash`` function. - .. literalinclude:: sqlDialog.py - :linenos: - :lines: 80-94 +.. literalinclude:: sqlDialog.py + :linenos: + :lines: 81-95 The ``send_message()`` function uses the given recipient and message to insert a new record into the database. Using :meth:`~.QSqlTableModel.OnManualSubmit` requires you to also call ``submitAll()``, since all the changes will be cached in the model until you do so. - .. literalinclude:: sqlDialog.py - :linenos: - :lines: 96-115 +.. literalinclude:: sqlDialog.py + :linenos: + :lines: 97-116 chat.qml -------- Let's look at the ``chat.qml`` file. - .. literalinclude:: chat.qml - :linenos: - :lines: 3-5 +.. literalinclude:: chat.qml + :linenos: + :lines: 4-6 First, import the Qt Quick module. This gives us access to graphical primitives such as Item, Rectangle, Text, and so on. @@ -86,9 +86,9 @@ root type, Window: Let's step through the ``chat.qml`` file. - .. literalinclude:: chat.qml - :linenos: - :lines: 8-13 +.. literalinclude:: chat.qml + :linenos: + :lines: 9-14 ``ApplicationWindow`` is a Window with some added convenience for creating a header and a footer. It also provides the foundation for popups and supports some basic styling, such as the background @@ -101,9 +101,9 @@ Once we've set these, we have a properly sized, empty window ready to be filled Because we are exposing the :code:`SqlConversationModel` class to QML, we will declare a component to access it: - .. literalinclude:: chat.qml - :linenos: - :lines: 15-17 +.. literalinclude:: chat.qml + :linenos: + :lines: 16-18 There are two ways of laying out items in QML: `Item Positioners`_ and `Qt Quick Layouts`_. @@ -113,13 +113,13 @@ There are two ways of laying out items in QML: `Item Positioners`_ and `Qt Quick resizable user interfaces. Below, we use `ColumnLayout`_ to vertically lay out a `ListView`_ and a `Pane`_. - .. literalinclude:: chat.qml - :linenos: - :lines: 19-22 + .. literalinclude:: chat.qml + :linenos: + :lines: 20-23 - .. literalinclude:: chat.qml - :linenos: - :lines: 71-73 + .. literalinclude:: chat.qml + :linenos: + :lines: 72-74 Pane is basically a rectangle whose color comes from the application's style. It's similar to `Frame`_, but it has no stroke around its border. @@ -144,18 +144,16 @@ remaining space that is left after accommodating the Pane. .. _attached properties: https://doc.qt.io/qt-5/qml-qtquick-layouts-layout.html .. _Layout.fillWidth: https://doc.qt.io/qt-5/qml-qtquick-layouts-layout.html#fillWidth-attached-prop .. _Layout.fillHeight: https://doc.qt.io/qt-5/qml-qtquick-layouts-layout.html#fillHeight-attached-prop -.. _ListView: https://doc.qt.io/qt-5/qml-qtquick-listview.html .. _Qt Quick QML Types: https://doc.qt.io/qt-5/qtquick-qmlmodule.html Let's look at the ``Listview`` in detail: - .. literalinclude:: chat.qml - :linenos: - :lines: 22-69 +.. literalinclude:: chat.qml + :linenos: + :lines: 23-70 After filling the ``width`` and ``height`` of its parent, we also set some margins on the view. - Next, we set `displayMarginBeginning`_ and `displayMarginEnd`_. These properties ensure that the delegates outside the view don't disappear when you scroll at the edges of the view. @@ -179,9 +177,9 @@ At the bottom of the screen, we place a `TextArea`_ item to allow multi-line tex button to send the message. We use Pane to cover the area under these two items: - .. literalinclude:: chat.qml - :linenos: - :lines: 71-95 +.. literalinclude:: chat.qml + :linenos: + :lines: 72-96 The `TextArea`_ should fill the available width of the screen. We assign some placeholder text to provide a visual cue to the contact as to where they should begin @@ -203,16 +201,16 @@ main.py We use ``logging`` instead of Python's ``print()``, because it provides a better way to control the messages levels that our application will generate (errors, warnings, and information messages). - .. literalinclude:: main.py - :linenos: - :lines: 3-15 +.. literalinclude:: main.py + :linenos: + :lines: 4-16 ``connectToDatabase()`` creates a connection with the SQLite database, creating the actual file if it doesn't already exist. - .. literalinclude:: main.py - :linenos: - :lines: 18-38 +.. literalinclude:: main.py + :linenos: + :lines: 19-39 A few interesting things happen in the ``main`` function: @@ -227,8 +225,8 @@ A few interesting things happen in the ``main`` function: Finally, the Qt application runs, and your program starts. - .. literalinclude:: main.py - :linenos: - :lines: 41-51 +.. literalinclude:: main.py + :linenos: + :lines: 42-52 .. image:: example_list_view.png |