Re: Write to an Edit Control with the << operator

From:

g.weilenmann@gmx.ch

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 05 Sep 2007 10:50:47 -0700

Message-ID:

<1189014647.302414.219070@g4g2000hsf.googlegroups.com>

Thank you so much David. This is simply amazing! Like magic... I can
recommend this piece of code to anyone!

On 5 Sep., 18:15, David Wilkinson <no-re...@effisols.com> wrote:

// untested
template <typename T>
CEdit& operator << (CEdit& edit, const T& t)
{
    std::basic_ostringstream<TCHAR> os;
    os << t;
    // append text os.str().c_str() using SetSel() and ReplaceSel()
    return edit;
}

My complete code looks like this now:
in GUI_Dlg.h I added (Outside any class)
template <typename T>
CEdit& operator << (CEdit& edit, const T& t) ;

in GUI_Dlg.cpp I added

template <typename T>
CEdit& operator << (CEdit& edit, const T& t)
{
    std::basic_ostringstream<TCHAR> os;
    os << t;

    // Print out the new text
    int nLength = edit.GetWindowTextLength();
    edit.SetSel(nLength, nLength);
    edit.ReplaceSel(os.str().c_str());

    return edit;
}

And this is an example how I use it:

m_edit << "new text " << 10 << " " << 1234.5678 << "\r\n";

I wonder tough why endl doesn't work:
m_edit << std::endl; //Gives a compile error

Anyway, thank you again David!
Cheers
Gabriel