--- a/src/mainwindow.h	Wed Mar 25 14:23:46 2015 +0100
+++ b/src/mainwindow.h	Wed Mar 25 14:24:38 2015 +0100
@@ -12,6 +12,7 @@
  */
 #include <QMainWindow>
 #include <QSettings>
+#include <QDateTime>
 
 class QPushButton;
 class QDropEvent;
@@ -52,6 +53,13 @@
     /** @brief Show an error dialog to the user. */
     void showErrorMessage(const QString& errMsg);
 
+    /** @brief update the status bar for the image.
+     *
+     * Function signature is similar to showPicture in pngviewer
+     */
+    void showPictureNameStatus(const QString& fileName, int current,
+            int max, const QDateTime& timestamp );
+
 private:
     QSettings mSettings;