--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/mainwindow.h	Mon Mar 23 12:41:52 2015 +0100
@@ -0,0 +1,58 @@
+/* Copyright (C) 2014 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 The Main UI class.
+ *
+ * Parent class of all dialogs and graphical user interaction.
+ */
+#include <QMainWindow>
+#include <QSettings>
+
+class QPushButton;
+class QDropEvent;
+class QDragLeaveEvent;
+class QDragMoveEvent;
+class QDragEnterEvent;
+
+class MainWindow : public QMainWindow
+{
+    Q_OBJECT
+
+public:
+    MainWindow();
+
+protected:
+    /** @brief UI setup */
+    void setupGUI();
+
+    /** @brief Cleanup and save the current state */
+    virtual void closeEvent(QCloseEvent *event);
+
+    /** @brief Restores the last window state */
+    void readSettings();
+
+    /* The drag drop actions */
+    void dragEnterEvent(QDragEnterEvent *event);
+    void dragMoveEvent(QDragMoveEvent *event);
+    void dragLeaveEvent(QDragLeaveEvent *event);
+    void dropEvent(QDropEvent *event);
+
+public slots:
+    /** @brief set an absolute folder to read a metadata.csv from. */
+    void setFolder(const QString &folder);
+
+protected slots:
+    /** @brief Show an error dialog to the user. */
+    void showErrorMessage(const QString& errMsg);
+
+private:
+    QSettings mSettings;
+
+    bool mHasValidFolder;
+    QString mCurFolder;
+};