QAbstractExtensionFactory¶
- PyQt5.QtDesigner.QAbstractExtensionFactory
Inherited by QExtensionFactory.
Description¶
The QAbstractExtensionFactory class provides an interface for extension factories in Qt Designer.
QAbstractExtensionFactory is not intended to be instantiated directly; use the QExtensionFactory instead.
In Qt Designer, extension factories are used to look up and create named extensions as they are required. For that reason, when implementing a custom extension, you must also create a QExtensionFactory, i.e a class that is able to make an instance of your extension, and register it using Qt Designer’s QExtensionManager.
When an extension is required, Qt Designer’s QExtensionManager will run through all its registered factories calling createExtension() for each until the first one that is able to create the requested extension for the selected object, is found. This factory will then make an instance of the extension.
See also
