assigning line marker to itself shouldn't invalidate it, add self-assignment check

[wxWidgets.git] / src / mgl / dcscreen.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        src/mgl/dcscreen.cpp
// Author:      Vaclav Slavik
// Id:          $Id$
// Copyright:   (c) 2001-2002 SciTech Software, Inc. (www.scitechsoft.com)
// Licence:     wxWindows licence
/////////////////////////////////////////////////////////////////////////////

// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"

#ifdef __BORLANDC__
    #pragma hdrstop
#endif

#include "wx/dcscreen.h"

#include "wx/mgl/private.h"

IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxDC)

wxScreenDC::wxScreenDC()
           :wxDC()
{
    SetMGLDC(g_displayDC, FALSE /* no ownership */);

    // VS: we have to hide the mouse, otherwise rendering artifacts may occur
    MS_obscure();
}

wxScreenDC::~wxScreenDC()
{
    MS_show();
}