Load a Windows predefined icon with wxIcon

Question

I'm trying to use IDI_INFORMATION with wxWidgets 2.8.11 (from wx/version.h) (for wxMemoryDC::DrawIcon). But first I have to load the icon: wxICON(IDI_INFORMATION) fails, LoadFile(wxT("IDI_INFORMATION")) also fails ( but LoadFile(IDI_INFORMATION) compiles and crashes, IDI_INFORMATION is a fake string pointer too tricky for wxWidgets). Hmmm, then I add some ifdefs to use Windows API: ::LoadIcon(NULL, IDI_INFORMATION) works, then wxIcon::SetHICON. While DrawIcon apparently works, the nasty surprise is that wxIcon::GetWidth, wxIcon::GetHeight return 0. Hmmm, let's get the size and use wxIcon::SetSize. Now it is finally done... wait!, but who's gonna destroy my icon? Not sure, so add the ifdef, SetHICON(NULL) and DestroyIcon.

The small question: do I have to destroy the icon myself?

The big question: is wxIcon entirely useless in this case?

PS After some debugging I discover that LoadFile(wxT("wxICON_INFORMATION")) works, wow!, but is it really multi-platform? Do I have read all the wx sources for drawing a standard icon?

Answer 1

The cross-platform solution is provided by wxArtProvider, just use its GetIcon() method with wxART_INFORMATION argument.