first re-commit.

application/xqmainwindow.h

@@ -0,0 +1,67 @@
+/***************************************************************************
+
+    source::worx xtree
+    Copyright © 2024-2025 c.holzheuer
+    christoph.holzheuer@gmail.com
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+***************************************************************************/
+
+
+#ifndef XQMAINWINDOW_H
+#define XQMAINWINDOW_H
+
+#include <QMainWindow>
+#include <ui_xqmainwindow.h>
+#include <xqdocumentstore.h>
+#include <xqmainmodel.h>
+#include <xqchildmodel.h>
+#include <xqappdata.h>
+
+class XQMainWindow : public QMainWindow, public Ui_XQMainWindow
+{
+  Q_OBJECT
+
+public:
+
+  XQMainWindow( QWidget* parent = nullptr );
+  virtual ~XQMainWindow() = default;
+
+  void initMainWindow();
+
+public slots:
+
+  void onUndo();
+  void onRedo();
+
+  void onCreateDocument();
+  void onOpenDocument();
+  void onSaveDocument();
+  void onSaveDocumentAs();
+  void onCloseDocument();
+  void onAbout();
+  void onExit();
+
+  void onTreeItemClicked(const QModelIndex& index );
+  void onTabClicked( int index );
+
+protected:
+
+  // fixme implement
+  void showDocumnet( const QString& key ){}
+  void loadDocument( const QString& fileName );
+  void saveDocument( const QString& fileName );
+
+  QUndoStack      _undoStack;
+  XQDocumentStore _documentStore;
+
+  XQMainModel     _mainModelView;
+
+
+};
+
+#endif // XQMAINWINDOW_H