Pave.

gui/groupview/GroupedProxyModel.cpp

@@ -0,0 +1,26 @@
+#include "GroupedProxyModel.h"
+
+#include "GroupView.h"
+
+GroupedProxyModel::GroupedProxyModel(QObject *parent) : QSortFilterProxyModel(parent)
+{
+}
+
+bool GroupedProxyModel::lessThan(const QModelIndex &left, const QModelIndex &right) const
+{
+	const QString leftCategory = left.data(GroupViewRoles::GroupRole).toString();
+	const QString rightCategory = right.data(GroupViewRoles::GroupRole).toString();
+	if (leftCategory == rightCategory)
+	{
+		return subSortLessThan(left, right);
+	}
+	else
+	{
+		return leftCategory < rightCategory;
+	}
+}
+
+bool GroupedProxyModel::subSortLessThan(const QModelIndex &left, const QModelIndex &right) const
+{
+	return left.row() < right.row();
+}