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170	* Acquires a scan from the current scanner device.	170		* Acquires a scan from the current scanner device.
171	* When the scan is complete, a result image will be sent by	171		* When the scan is complete, a result image will be sent by
172	* @c sigNewImage.	172		* @c sigNewImage.
173	*	173		*
174	* @param filename File name to load, for virtual scanner test mode.	174		* @param filename File name to load, for virtual scanner test mode.
175	* If this is a null or empty string, a real scan is performed.	175		* If this is a null or empty string, a real scan is performed.
176	* @return The status of the operation	176		* @return The status of the operation
177	**/	177		**/
178	KScanDevice::Status acquireScan(const QString &filename = QString::null);	178		KScanDevice::Status acquireScan(const QString &filename = QString());
179		179
180	/**	180		/**
181	* Get the standard file name for saving the preview image for the	181		* Get the standard file name for saving the preview image for the
182	* current scanner.	182		* current scanner.
183	*	183		*
184	* @return Preview file name	184		* @return Preview file name
185	*	185		*
186	* @note Saving the preview image this does not actually work unless a	186		* @note Saving the preview image this does not actually work unless a
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