qmlRegisterType(pytype: type, uri: str, versionMajor: int, versionMinor: int, qmlName: str) int
  • pytype (type) – Python class

  • uri (str) – uri to use while importing the component in QML

  • versionMajor (int) – major version

  • versionMinor (int) – minor version

  • qmlName (str) – name exposed to QML


int (the QML type id)

This function registers the Python type in the QML system with the name qmlName, in the library imported from uri having the version number composed from versionMajor and versionMinor.

For example, this registers a Python class ‘MySliderItem’ as a QML type named ‘Slider’ for version ‘1.0’ of a module called ‘com.mycompany.qmlcomponents’:

qmlRegisterType(MySliderItem, "com.mycompany.qmlcomponents", 1, 0, "Slider")

Once this is registered, the type can be used in QML by importing the specified module name and version number:

import com.mycompany.qmlcomponents 1.0

Slider { ... }

Note that it’s perfectly reasonable for a library to register types to older versions than the actual version of the library. Indeed, it is normal for the new library to allow QML written to previous versions to continue to work, even if more advanced versions of some of its types are available.