first re-commit.

model/xqselectionmodel.cpp

@@ -0,0 +1,65 @@
+/***************************************************************************
+
+    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.
+
+***************************************************************************/
+
+
+#include <xqselectionmodel.h>
+#include <xqitem.h>
+
+XQSelectionModel::XQSelectionModel(QAbstractItemModel* model)
+    : QItemSelectionModel(model)
+{
+
+}
+
+XQSelectionModel::XQSelectionModel(QAbstractItemModel* model, QObject* parent)
+    : QItemSelectionModel(model, parent)
+{
+
+}
+
+
+
+void XQSelectionModel::select(const QItemSelection& selection, QItemSelectionModel::SelectionFlags command)
+{
+  // step #0: fetch selected indices.
+  QModelIndexList list = selection.indexes();
+  if (list.isEmpty() || selectedRows().isEmpty() )
+    return QItemSelectionModel::select(selection, command);
+
+  // fetch first index
+  QModelIndex firstValid = list.first();  
+  if (hasSelection() )
+    firstValid = selectedRows().first();
+
+  //XQItem& firstItem = XQItem::xqItemFromIndex(firstValid);
+  //if( firstItem.isValid() )
+  {
+
+    XQNodePtr firstNode = XQItem::xqItemFromIndex(firstValid).contentNode();
+    QItemSelection newSelection;
+    // __fixme! das crasht!
+
+    for (const QModelIndex& idx : list)
+    {
+      XQNodePtr nextNode = XQItem::xqItemFromIndex(idx).contentNode();
+      if (!nextNode || idx.data().toString().isEmpty() || nextNode->tag_name() != firstNode->tag_name() )
+         break;
+      newSelection.select(idx, idx);
+    }
+    return QItemSelectionModel::select(newSelection, command);
+  }
+
+
+  QItemSelectionModel::select(selection, command);
+
+}