first commit, again.

src/util/xqmapindex.h

@@ -0,0 +1,75 @@
+/***************************************************************************
+
+    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 XQMAPINDEX_H
+#define XQMAPINDEX_H
+
+#include <QMap>
+
+/**
+ * @brief Holds the string to index mapping for the QXMaptor classes
+ */
+
+class XQMapIndex : public QMap<QString, int>
+{
+
+public:
+
+  virtual ~XQMapIndex() = default;
+
+  void addKey(const QString& key, int index)
+  {
+    (*this)[key] = index;
+  }
+
+  int indexOf(const QString& key) const
+  {
+    if (contains(key))
+      return (*this)[key];
+    return -1;
+  }
+
+
+  void update(int index)
+  {
+
+    XQMapIndex newindex;
+    QMapIterator<QString, int> iter(*this);
+
+    while (iter.hasNext())
+    {
+      iter.next();
+
+      // item idx == kill-index: continue
+      // item idx <  kill-index: store item
+      // item idx >  kill-index: decrement & store item
+
+      int idx = iter.value();
+      if (idx == index)
+        continue;
+      if (idx > index)
+        idx--;
+      // schlüssel auch sichern
+      newindex[(iter.key())] = idx;
+
+    }
+
+    swap(newindex);
+
+  }
+
+};
+
+
+#endif // XQMAPINDEX_H