--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/converter.h	Tue Mar 22 10:39:19 2016 +0100
@@ -0,0 +1,81 @@
+#ifndef CONVERTER_H
+#define CONVERTER_H
+/* Copyright (C) 2016 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.
+ */
+
+#include <QThread>
+#include <QString>
+#include <QStringList>
+#include <QTextStream>
+#include <QFile>
+
+#include "xlsxformat.h"
+
+/** @file Declaration of the Converter class.
+ */
+
+/**
+ * @enum ConvertFormat
+ * @brief Possible output format values.
+ */
+enum ConvertFormat {
+    /*! XLSX (default). */
+    Format_XLSX,
+    /*! PDF */
+    Format_PDF
+};
+
+/** @brief Base class of Convert operations.
+ *
+ * Set up an instance of this using the ctor and according setters and
+ * start it.
+ */
+class Converter : public QThread
+{
+    Q_OBJECT
+
+public:
+    /** Construct a new Converter object.
+     *
+     * If input is empty stdin is used. If output
+     * is empty stdout is used.
+     *
+     * @param input input filename.
+     * @param output output filename.
+     * @param format the format of this.
+     */
+    Converter(const QString &input, const QString &output,
+              ConvertFormat fmt = Format_XLSX,
+              const QString &title = QString());
+
+    /** Check for errors
+     *
+     * @returns Empty stringlist on success. Translated errors otherwise.*/
+    const QStringList & errors() {return mErrors;}
+
+protected:
+    void convertToXSLX(QTextStream &instream, QFile &output);
+    void run();
+
+    QString mInput, mOutput;
+    ConvertFormat mFmt;
+    QStringList mErrors;
+    QString mTitle;
+
+    QXlsx::Format mTitleFmt,
+                  mQuestionFmt,
+                  mAnswerChoiceFmt,
+                  mAnswerTextFmt,
+                  mFreeTextFmt,
+                  mChoiceTextFmt,
+                  mChoiceBarFmt,
+                  mChoiceBarInactiveFmt,
+                  mChoiceVotesFmt;
+};
+
+#endif // CONVERTER_H