--- a/src/filterwidget.h	Thu Jun 18 19:35:22 2015 +0200
+++ b/src/filterwidget.h	Fri Jun 19 14:26:16 2015 +0200
@@ -12,6 +12,7 @@
 
 class QSortFilterProxyModel;
 class QComboBox;
+class QCheckBox;
 class QLineEdit;
 /**
  * @class FilterWidget
@@ -22,26 +23,35 @@
     Q_OBJECT
 
 public:
-    /**@brief construct a filterwidget for the model model.*/
-    FilterWidget (QSortFilterProxyModel *model,
+    /**@brief construct a filterwidget for the model model.
+     *
+     * @param model The model to filter
+     * @param addWithEmptyChk wether or not to add the include empty checkbox.
+     * */
+    FilterWidget (QSortFilterProxyModel *model, bool addWithEmptyChk,
             QWidget * parent = 0, Qt::WindowFlags f = 0);
 
 Q_SIGNALS:
     void filterHasChanged();
 
+    void includeEmptyChanged(int state);
+
 protected:
     void setupGUI();
 
-protected slots:
+public slots:
     void headersChanged();
 
+protected slots:
     void filterChanged();
 
 private:
     QSortFilterProxyModel *mModel;
     QComboBox *mCombo;
+    QCheckBox *mEmptyChk;
     QLineEdit *mEditLine;
     /* Maps the combo index to the model col index */
     QMap<int, int> mColFilterMap;
+    bool mWithEmptyChk;
 };
 #endif // FILTERWIDGET_H