Using QXlsx::Document instead of QXlsx::Workbook

src/xlsx/xlsxdocument_p.h

@@ -2,6 +2,9 @@
 #define XLSXDOCUMENT_P_H
 
 #include "xlsxdocument.h"
+#include "xlsxworkbook.h"
+
+#include <QMap>
 
 namespace QXlsx {
 
@@ -10,6 +13,7 @@ class DocumentPrivate
     Q_DECLARE_PUBLIC(Document)
 public:
     DocumentPrivate(Document *p);
+    void init();
 
     bool loadPackage(QIODevice *device);
 
@@ -17,6 +21,8 @@ public:
     const QString defaultPackageName; //default name when package name not specified
     QString packageName; //name of the .xlsx file
 
+    QMap<QString, QString> documentProperties; //core, app and custom properties
+    Workbook *workbook;
 };
 
 }