--- a/src/pngplayer.h	Wed May 06 16:10:01 2015 +0200
+++ b/src/pngplayer.h	Wed May 06 17:17:13 2015 +0200
@@ -48,15 +48,16 @@
      * @param current: The row index of the currently shown image.
      * @param max: The row count.
      * @param timestamp: The timestamp of the image.
+     * @param number: The index number of the picture to show.
      */
     void showPicture(const QString& fileName, int current, int max,
-        const QDateTime& timestamp);
+        const QDateTime& timestamp, int number);
 
     /**@brief set the base dir to which filenames will be relative. */
     void setBaseDir(const QString& dirName) { mBaseDir.setPath(dirName); }
 
     /**@brief update positional information / slider current / max info. */
-    void updatePositions(int current, int max, const QDateTime& timestamp);
+    void updatePositions(int current, int max, const QDateTime& timestamp, int number);
 
     /**@brief set the replay speed */
     void setSpeed(int mSecsPerPicture);