Re: Prevent invalid chars in editbox

David Lowndes wrote:


Bah, there are so many situations to worry about! :)

Anyway, I tried handling pastes but my problem is: what do I do when I
have a paste that consists of valid strings? I just want the CEdit base
class handle it then...here's my code:

LRESULT
NumberEditBox::OnPaste(WPARAM wParam, LPARAM lParam)
{
    if (!IsClipboardFormatAvailable(CF_TEXT))
    {
       TRACE0("OnPaste() called but CF_TEXT was not available.\n");

       return 0;
    }

    VERIFY(::OpenClipboard(NULL));

    HGLOBAL hdl = ::GetClipboardData(CF_TEXT);

    if (hdl == 0)
    {
       DWORD error_code = ::GetLastError();
       TRACE1("GetClipboardData() failed: %i\n", error_code);
    }
    else
    {
       const char *str = (const char *)::GlobalLock(hdl);

       if (!contains_invalid_char(str)
           // Valid paste..but how do I make it happen??

       ::GlobalUnlock(hdl);
    }

    VERIFY(::CloseClipboard());

    return 0;
}