Addded HorizontalProxyModel which is used to effictively rotate a table 90 degrees.

pglab/HorizontalProxyModel.cpp

@@ -0,0 +1,56 @@
+#include "HorizontalProxyModel.h"
+/*
+ * Code borrowed from: https://stackoverflow.com/questions/21653253/how-to-change-orientation-of-qt-tableview
+ */
+
+
+HorizontalProxyModel::HorizontalProxyModel(QObject *parent)
+	: QAbstractProxyModel(parent)
+{
+}
+
+QModelIndex HorizontalProxyModel::mapToSource(const QModelIndex &proxyIndex) const
+{
+	if (sourceModel()) {
+		return sourceModel()->index(proxyIndex.column(), proxyIndex.row());
+	}
+	else {
+		return QModelIndex();
+	}
+}
+
+QModelIndex HorizontalProxyModel::mapFromSource(const QModelIndex &sourceIndex) const
+{
+	return index(sourceIndex.column(), sourceIndex.row());
+}
+
+QModelIndex HorizontalProxyModel::index(int row, int column, const QModelIndex &) const
+{
+	return createIndex(row, column, nullptr);
+}
+
+QModelIndex HorizontalProxyModel::parent(const QModelIndex &) const
+{
+	return QModelIndex();
+}
+
+int HorizontalProxyModel::rowCount(const QModelIndex &) const
+{
+	return sourceModel() ? sourceModel()->columnCount() : 0;
+}
+
+int HorizontalProxyModel::columnCount(const QModelIndex &) const
+{
+  return sourceModel() ? sourceModel()->rowCount() : 0;
+}
+
+QVariant HorizontalProxyModel::headerData(
+		   int section, Qt::Orientation orientation, int role) const
+{
+	if (!sourceModel()) {
+		return QVariant();
+	}
+	Qt::Orientation new_orientation = orientation == Qt::Horizontal ?
+			Qt::Vertical : Qt::Horizontal;
+	return sourceModel()->headerData(section, new_orientation, role);
+}