first re-commit.

widgets/xqtreeview.h

@@ -0,0 +1,62 @@
+/***************************************************************************
+
+    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 XQTREEVIEW_H
+#define XQTREEVIEW_H
+
+#include <QTreeView>
+#include <QMouseEvent>
+#include <QDebug>
+
+class XQItem;
+class XQModel;
+
+/**
+ * @brief A specialized QTreeView that will handle the drawing of
+ * empty or non-existing items in the future.
+ */
+
+class XQTreeView : public QTreeView
+{
+  Q_OBJECT
+  Q_DECLARE_PRIVATE(QTreeView)
+
+public:
+
+  XQTreeView(QWidget* parent = nullptr );
+  virtual ~XQTreeView();
+
+  XQModel* modelView();
+  XQItem&  xqItemFromIndex(const QModelIndex& index );
+
+protected:
+
+  void currentChanged(const QModelIndex& current, const QModelIndex& previous) override;
+
+  void mouseMoveEvent(QMouseEvent* event) override;
+  //! Mouse press event.used to emulate the behavior of a QHeaderView in the first line of the view
+  void mouseDoubleClickEvent(QMouseEvent* event) override;
+  //! Mouse release event.used to emulate the behavior of a QHeaderView in the first line of the view
+  void mouseReleaseEvent(QMouseEvent* event) override;
+  //! Mouse press event.used to emulate the behavior of a QHeaderView in the first line of the view
+  void mousePressEvent(QMouseEvent* event) override;
+  void mouseResizeHeaderEntry(int xpos);
+  //! Mouse wheel event.
+  void wheelEvent(QWheelEvent* event) override;
+
+  //! used by the mouse events
+  QModelIndex _indexToResize;
+};
+
+#endif // XQTREEVIEW_H