Easy way to save a QImage in a background thread in c++ applications based on qt.

ImageSaver.h

/**
* Image saver class. Saves an image in the background. 
*/
class ImageSaver : public QObject
{
	//based on: http://stackoverflow.com/questions/13878745/correct-way-of-threading-in-qt
	Q_OBJECT
public:
	/**
	* Constructor, moves itself to a background thread. 
	*/
	ImageSaver() : QObject() {
		moveToThread(&t);
		t.start();
	}
	~ImageSaver() {
		qDebug("Bye bye!");
		t.quit();
		t.wait();
	}

	/**
	* Request a new image to be saved. 
	* @param image the image to save. 
	* @param absPath the absolute path of where to save the image. 
	*/
	void requestImageSave(QImage image, QString absPath) {
		//thread save way to invoke the save image slot. 
		QMetaObject::invokeMethod(this, "saveImage", Q_ARG(QImage, image), Q_ARG(QString, absPath));
	}

	public slots:
	/**
	* Needs to be a slot to be invokable with QMetaObject. 
	* Performs the saving of the image. 
	* @param image the image to save. 
	* @param absPath the absolute path of where to save the image. 
	*/
	void saveImage(QImage image, QString absPath) {
		bool saved = image.save(absPath);
		emit imageReady(image, absPath);
	}

signals:
	/**
	* Signal to connect to after the image has been saved. 
	*/
	void imageReady(QImage image, QString path);

private:
	/**
	* Worker thread, saves image in this thread and then ends. 
	*/
	QThread t;
};