void CMyListCtrl::OnPaint()
{
// First let the control do its default drawing.
const MSG *msg = GetCurrentMessage();
DefWindowProc( msg->message, msg->wParam, msg->lParam );
// Draw the lines only for LVS_REPORT mode
if( (GetStyle() & LVS_TYPEMASK) == LVS_REPORT )
{
// Get the number of columns
CClientDC dc(this );
CHeaderCtrl* pHeader = (CHeaderCtrl*)GetDlgItem(0);
int nColumnCount = pHeader->GetItemCount();
// The bottom of the header corresponds to the top of the line
RECT rect;
pHeader->GetClientRect( &rect );
int top = rect.bottom;
// Now get the client rect so we know the line length and
// when to stop
GetClientRect( &rect );
// The border of the column is offset by the horz scroll
int borderx = 0 - GetScrollPos( SB_HORZ );
for( int i = 0; i < nColumnCount; i++ )
{
// Get the next border
borderx += GetColumnWidth( i );
// if next border is outside client area, break out
if( borderx >= rect.right ) break;
// Draw the line.
dc.MoveTo( borderx-1, top);
dc.LineTo( borderx-1, rect.bottom );
}
// Draw the horizontal grid lines
// First get the height
if( !GetItemRect( 0, &rect, LVIR_BOUNDS ))
return;
int height = rect.bottom - rect.top;
GetClientRect( &rect );
int width = rect.right;
for( i = 1; i <= GetCountPerPage(); i++ )
{
dc.MoveTo( 0, top + height*i);
dc.LineTo( width, top + height*i );
}
}
// Do not call CListCtrl::OnPaint() for painting messages
}
BTW, Paul Gerhart has also implemented this using an owner-drawn CListCtrl.He has made the source code available with a sample app. You can find itat http://www.voicenet.com/~pgerhart/_shware.html
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