MFC Virtual List Control row height change

Question

i want to change listCtrl row height

used OnMeasureItem for change row height and OnGetdispinfoListCtrl for data insert

void ShipInfoDlg::OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
if(nIDCtl == IDC_LISTCTRL)
{
    LOGFONT lf;
    
    GetDlgItem(IDC_LISTCTRL)->GetFont()->GetLogFont( &lf );

    
    if( lf.lfHeight < 0 )
        lpMeasureItemStruct->itemHeight = -lf.lfHeight + 10;
    else
        lpMeasureItemStruct->itemHeight = lf.lfHeight + 10; 
} 
else CDialog::OnMeasureItem(nIDCtl, lpMeasureItemStruct);

}

start this code, winctrl2.cpp Line:593 error

void CListCtrl::DrawItem(LPDRAWITEMSTRUCT)
{
ASSERT(FALSE);
}

it's that error

i know this problem is in drawItem

but i don`t know solution

thank you

Answer 1

For an LBS_NODATA list box you are responsible for drawing the items by handling the WM_DRAWITEM message.

To do so, you will need to provide an implementation for DrawItem in your CListCtrl-derived class, as explained in the documentation:

By default, this member function does nothing. Override this member function to implement drawing for an owner-draw CListCtrl object.

The base class implementation, CListCtrl::DrawItem, fails with a debug assertion so that the missing implementation won't get easily ignored.