Start of marking of images for selection

database.h

@@ -0,0 +1,23 @@
+#ifndef DATABASE_H
+#define DATABASE_H
+
+#include <QObject>
+#include <QSqlDatabase>
+#include <QSqlQuery>
+
+class Database : public QObject
+{
+    Q_OBJECT
+    QSqlDatabase m_database;
+    QSqlQuery m_markQuery;
+    QSqlQuery m_unmarkQuery;
+public:
+    explicit Database(QObject *parent = 0);
+    bool init();
+    bool mark(QString &filename);
+    bool unmark(QString &filename);
+protected:
+    bool checkError();
+};
+
+#endif // DATABASE_H