Force update of a virtual CListCtrl

Question

I have a CListCtrl containings about 2500 differents elements consisting of a 48x48 icon and text.

Due to the amount of data I implemented it as a virtual list providing

ON_NOTIFY(LVN_GETDISPINFO, IDC_LST_ICONS, &CWGDIconSearchDlg::OnLvnGetdispinfoLstIcons)
ON_NOTIFY(LVN_ODFINDITEM, IDC_LST_ICONS, &CWGDIconSearchDlg::OnLvnOdfinditemLstIcons)

My problem is when I change list content these callback get never called.

How can I force it?

Answer 1

Windows cannot know that you have changed an item in virtual list.

In order to trigger a redraw of your CListCtrl, you must call yourcontrol.Invalidate() which will trigger a repaint of your control.