QQuickImageResponse class provides an interface for asynchronous image loading in
QQuickAsyncImageProvider . More…
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The purpose of an image response is to provide a way for image provider jobs to be executed in an asynchronous way.
Responses are deleted via
deleteLater once the
finished() signal has been emitted. If you are using
QRunnable as base for your
QQuickImageResponse ensure automatic deletion is disabled.
See the Image Response Provider Example for a complete implementation.
- class PySide6.QtQuick.QQuickImageResponse#
Constructs the image response
This method is used to communicate that the response is no longer required by the engine.
It may be reimplemented to cancel a request in the provider side, however, it is not mandatory.
QQuickImageResponse still needs to emit
finished() so that the engine may clean up the
finished() should not be emitted until the response is complete, regardless of whether or not cancel() was called. If it is called prematurely, the engine may destroy the response while it is still active, leading to a crash.
- Return type:
Returns the error string for the job execution. An empty string means no error.
Signals that the job execution has finished (be it successfully, because an error happened or because it was cancelled).
Emission of this signal must be the final action the response performs: once the signal is received, the response will subsequently be destroyed by the engine.
- abstract PySide6.QtQuick.QQuickImageResponse.textureFactory()#
- Return type:
Returns the texture factory for the job. You can use
textureFactoryForImage if your provider works with
QImage . The engine takes ownership of the returned
This method will be called only when needed. For example, it may not be called if there is an error or the job is cancelled. Therefore, allocate the
QQuickTextureFactory instance only in this method or otherwise ensure its deletion.