feat: basic geometry spreadsheet model

src/Gui/GeometrySpreadsheetPanel/GeometrySpreadsheetModel.cpp

@@ -0,0 +1,32 @@
+#include "Gui/GeometrySpreadsheetPanel/GeometrySpreadsheetModel.h"
+
+int GeometrySpreadsheetModel::rowCount(const QModelIndex &parent) const
+{
+    return stringList.count();
+}
+
+QVariant GeometrySpreadsheetModel::data(const QModelIndex &index, int role) const
+{
+    if (!index.isValid())
+        return QVariant();
+
+    if (index.row() >= stringList.size())
+        return QVariant();
+
+    if (role == Qt::DisplayRole)
+        return stringList.at(index.row());
+    else
+        return QVariant();
+}
+
+QVariant GeometrySpreadsheetModel::headerData(int section, Qt::Orientation orientation,
+                                     int role) const
+{
+    if (role != Qt::DisplayRole)
+        return QVariant();
+
+    if (orientation == Qt::Horizontal)
+        return QStringLiteral("Column %1").arg(section);
+    else
+        return QStringLiteral("Row %1").arg(section);
+}