--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/includeemptysortmodel.h	Fri Jun 19 14:26:16 2015 +0200
@@ -0,0 +1,42 @@
+#ifndef INCLUDEEMPTYSORTMODEL_H
+#define INCLUDEEMPTYSORTMODEL_H
+/* Copyright (C) 2015 by ETH Zürich
+ * Software engineering by Intevation GmbH
+ *
+ * This file is Free Software under the GNU GPL (v>=2)
+ * and comes with ABSOLUTELY NO WARRANTY!
+ * See LICENSE.txt for details.
+ */
+
+/**
+ * @file  metadataview.h
+ * @brief Table view of the meta data information
+ */
+/**
+ * @class IncludeEmptySortModel
+ * @brief Small wrapper around sort filter model to allow custom filtering
+ */
+#include <QModelIndex>
+#include <QSortFilterProxyModel>
+
+class IncludeEmptySortModel : public QSortFilterProxyModel
+{
+    Q_OBJECT
+
+public:
+    IncludeEmptySortModel() : QSortFilterProxyModel(), mIncludeEmpty(false) {}
+
+    /** @brief wrapper around the base class call that accepts empty
+     * values if includeEmpty is checked. */
+    bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const;
+
+public slots:
+    void setIncludeEmpty(int state) {
+        mIncludeEmpty = state != Qt::Unchecked;
+        invalidate();
+    }
+
+private:
+    bool mIncludeEmpty;
+};
+#endif // INCLUDEEMPTYSORTMODEL_H