Add down arrows and up arrows
2025-12-15
Written by: xiaobin
Based on the content of article number “Sorting in a List Control”.
void CMFCApplication1Dlg::SetSortArrow(int colIndex, bool ascending)
{
for (int i = 0; i < m_ListOfDb.GetHeaderCtrl()->GetItemCount(); ++i)
{
HDITEM hditem = { 0 };
hditem.mask = HDI_FORMAT;
VERIFY(m_ListOfDb.GetHeaderCtrl()->GetItem(i, &hditem));
hditem.fmt &= ~(HDF_SORTDOWN | HDF_SORTUP);
if (i == colIndex)
{
hditem.fmt |= ascending ? HDF_SORTDOWN : HDF_SORTUP;
}
VERIFY(m_ListOfDb.GetHeaderCtrl()->SetItem(i, &hditem));
}
}void CMFCApplication1Dlg::OnLvnColumnclickList2(NMHDR *pNMHDR, LRESULT *pResult)
{
LPNMLISTVIEW pNMLV = reinterpret_cast<LPNMLISTVIEW>(pNMHDR);
// TODO: Add your control notification handler code here
int colIndex = pNMLV->iSubItem;
if (m_SortCol == colIndex)
{
m_Ascending = !m_Ascending;
}
else
{
m_SortCol = colIndex;
m_Ascending = true;
}
BOOL bSort = m_ListOfDb.SortItems(CompareFunc, pNMLV->iSubItem);
if (bSort)
//SetSortArrow(m_SortCol, m_Ascending);
SetSortArrow(m_SortCol, TRUE); //// Only ASC ICON
*pResult = 0;
}