diff --git a/common/comic.cpp b/common/comic.cpp
index 00dc3581..dfe9d065 100644
--- a/common/comic.cpp
+++ b/common/comic.cpp
@@ -419,6 +419,11 @@ void FileComic::unknownError(int index)
 	//emit errorOpening();
 }
 
+bool FileComic::isCancelled()
+{
+    return _invalidated;
+}
+
 //--------------------------------------
 
 QList<QVector<quint32> > FileComic::getSections(int & sectionIndex)
diff --git a/common/comic.h b/common/comic.h
index 90cc314f..89e895be 100644
--- a/common/comic.h
+++ b/common/comic.h
@@ -121,13 +121,16 @@ class FileComic : public Comic, public ExtractDelegate
 		FileComic();
 		FileComic(const QString & path, int atPage = -1);
 		~FileComic();
-		void fileExtracted(int index, const QByteArray & rawData);
 		virtual bool load(const QString & path, int atPage = -1);
 		virtual bool load(const QString & path, const ComicDB & comic);
+        static QList<QString> filter(const QList<QString> & src);
+
+        //ExtractDelegate
+        void fileExtracted(int index, const QByteArray & rawData);
 		void crcError(int index);
 		void unknownError(int index);
-		static QList<QString> filter(const QList<QString> & src);
-	
+        bool isCancelled();
+
 	public slots:
 		
 		void process();