New in version 5.6.
The purpose of an image response is to provide a way for image provider jobs to be executed in an asynchronous way.
See the Image Response Provider Example for a complete implementation.
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.
finished()should not be emitted until the response is complete, regardless of whether or not 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.
- Return type
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
QQuickTextureFactoryinstance only in this method or otherwise ensure its deletion.
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