C / C++ / MFC

void AlarmCompreMsgDig::OnLvnItemchangedList1(NMHDR *pNMHDR, LRESULT *pResult)
{
	LPNMLISTVIEW pNMLV = reinterpret_cast(pNMHDR);
	m_lstAlarmCompreMsg.SetItemState(-1, 0, LVIS_SELECTED); // first, diselect the row

	int rowIndex = pNMLV->iItem;
	
	CRect rec;  // boundary rectangular that wrap the row
	m_lstAlarmCompreMsg.GetItemRect(rowIndex, rec, LVIR_BOUNDS);


	// a little adjust the rectangular
        rec.top -= 2;
	rec.bottom += 2;

	CDC* cdc = m_lstAlarmCompreMsg.GetDC();

	CPen aPen;
	
        // oldRowIndex is the member of dialog
       if (oldRowIndex == rowIndex){ // this occurs 1st, and 3rd also 
             aPen.CreatePen(PS_SOLID, 1, RGB(0, 0, 0)); // select color Black (background color)
        } 
        else // this occurs 2nd
        {
             aPen.CreatePen(PS_SOLID, 1, RGB(255, 255, 255)); // select color White
             oldRowIndex = rowIndex;   // update oldRowIndex
        }        
	
	CPen* pOldPen = cdc->SelectObject(&aPen); // Select the pen
	
	// Now draw the rectangular
	cdc->Rectangle(rec);

        // select back the old pen
	cdc->SelectObject(pOldPen);
        
        *pResult = 0;
}

tataxin wrote:

But there is something wrong here: this function is called 3 time totally.

typedef struct tagNMLISTVIEW {
    NMHDR hdr;
    int iItem;
    int iSubItem;
    UINT uNewState;
    UINT uOldState;
    UINT uChanged;
    POINT ptAction;
    LPARAM lParam;
} NMLISTVIEW, *LPNMLISTVIEW;

int x = pNMLV->uChanged;
if (x == ){
		// draw rectangular here
	} else if (x == LVIS_FOCUSED){
		// remove old rectangular here
	} else if (x == LVIS_SELECTED){
		// do nothing
	}

tataxin wrote:

int x = pNMLV->uChanged;

tataxin wrote:

if (x == ){

if ((pNMLV->uChanged & LVIF_STATE) != LVIF_STATE)
		return; // state has not changed

	if (pNMLV->uOldState & LVIS_SELECTED)
	{
		// remove old rectangular here
	}
	else if (pNMLV->uNewState & LVIS_SELECTED)
	{
		// draw new rectangular here
	}