Method OnGridColSort

src/variablegrid.cpp:1132–1138

void VariableGridFrame::OnGridColSort(wxGridEvent& event)
{
	const int col = event.GetCol();
	m_griddata->Sort(col, !(m_grid->IsSortingBy(col) &&
		m_grid->IsSortOrderAscending()));
	UpdateGrid();
}