qml - Qt for Python (original) (raw)

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pyside6-qml¶

pyside6-qml mimics some capabilities of Qt’s qml runtime utility by directly invoking QQmlEngine/QQuickView. It enables prototyping with QML/QtQuick without the need to write any Python code that loads the QML files either through QQmlApplicationEngine or the QQuickView class. The tool also detects the QML classes implemented in Python and registers them with the QML type system.

Usage¶

Consider the example Extending QML - Plugins Example. This example does not have a Python file with a main function that initializes a QmlEngine to load the QML fileapp.qml. You can run the example by running

pyside6-qml examples/qml/tutorials/extending-qml/chapter6-plugins/app.qml -I examples/qml/tutorials/extending-qml/chapter6-plugins/Charts

The -I flag is used to point pyside6-qml to the folder containing Python files that implement QML classes.

Command Line Options¶

Here are all the command line options of pyside6-qml:

Arguments¶

• file: This option refers to the QML file to be loaded by pyside6-qml. This option does not have a name or a flag. Therefore, this option should be the first option supplied topyside6-qml. For example,

pyside6-qml /path/to/test.qml

Options¶

• –module-paths/-I: Specify space-separated folder/file paths which point to the Python files that implement QML classes. By default, the parent directory of the QML file supplied topyside6-qml is searched recursively for all Python files and they are imported. Otherwise, only the paths given in module paths are searched.
• –verbose/-v: Run pyside6-qml in verbose mode. When run in this mode, pyside6-qml prints log messages during various stages of processing.

Options that align with the qml runtime utility¶

• –app-typ/-a: Specifies which application class to use. It takes one of the three values -core, gui, widget. The default value is gui.
• –config/-c: Load the given built-in configuration. It takes one of two values - default, resizeToItem. This option is only relevant for a QtQuick application. If default is used, the view resizes to the size of the root item in the QML. If resizeToItem is used, the view automatically resizes the root item to the size of the view.
• –list-conf: List the built-in configurations. pyside6-qml has two built-in configurations - default and resizeToItem. See the option --config for more information.
• –rhi/-r: Specifies the backend for the Qt graphics abstraction (RHI). It takes one of the four values - vulkan, metal, d3dll, gl.
• –verbose/-v: List the built-in configurations. pyside6-qml has two built-in configurations - default and resizeToItem. See the option --config for more information.
• –gles: Force use of GLES (AA_UseOpenGLES).
• –desktop: Force use of desktop OpenGL (AA_UseDesktopOpenGL).
• –software: Force use of software rendering(AA_UseSoftwareOpenGL).
• –disable-context-sharing: Disable the use of a shared GL context for QtQuick Windows”.