#include "stdafx.h"

#include "SPColorManager.h"
#include "SPDrawHelpers.h"

#ifdef _DEBUG
#undef THIS_FILE
static char	THIS_FILE[]						= __FILE__;
#define new DEBUG_NEW
#endif

HHOOK		CSPMouseMonitor::m_hHookMouse	= 0;
CWnd *		CSPMouseMonitor::m_pWndMonitor	= 0;

//////////////////////////////////////////////////////////////////////////
// CSPMouseMonitor
//////////////////////////////////////////////////////////////////////////

void CSPMouseMonitor::SetupHook( CWnd * pWndMonitor )
{
	if ( pWndMonitor && m_hHookMouse == 0 )
	{
		m_hHookMouse = SetWindowsHookEx( WH_MOUSE,MouseProc,0,GetCurrentThreadId() );
	}
	if ( !pWndMonitor && m_hHookMouse )
	{
		UnhookWindowsHookEx( m_hHookMouse );
		m_hHookMouse = 0;
	}
	m_pWndMonitor = pWndMonitor;
}

LRESULT CALLBACK CSPMouseMonitor::MouseProc( int nCode , WPARAM wParam , LPARAM lParam )
{
	if ( nCode != HC_ACTION || !m_pWndMonitor )
	{
		return CallNextHookEx( m_hHookMouse,nCode,wParam,lParam );
	}

	CSPWindowRect	rc	( m_pWndMonitor );

	if ( !rc.PtInRect( ( ( PMOUSEHOOKSTRUCT ) lParam )->pt ) )
	{
		switch ( wParam )
		{
		case WM_LBUTTONDOWN:
		case WM_NCLBUTTONDOWN:
		case WM_RBUTTONDOWN:
		case WM_NCRBUTTONDOWN:
		case WM_MBUTTONDOWN:
		case WM_NCMBUTTONDOWN:
		case WM_LBUTTONUP:
		case WM_NCLBUTTONUP:
			m_pWndMonitor->GetOwner()->SetFocus();
			return TRUE;
		}
	}

	return CallNextHookEx( m_hHookMouse,nCode,wParam,lParam );
}


//===========================================================================
// CSPClientCursorPos class
//===========================================================================

CSPTransparentBitmap::CSPTransparentBitmap( HBITMAP hBitmap ) : m_hBitmap( hBitmap )
{
}

// Not foolproof, but works 99% of the time :).  Assumes the top
// left pixel is the transparent color.

COLORREF CSPTransparentBitmap::GetTransparentColor() const
{
	CBitmap *	pBitmap	= CBitmap::FromHandle( m_hBitmap );
	if ( pBitmap != NULL )
	{
		CSPCompatibleDC	dc	( NULL,pBitmap );
		return dc.GetPixel( 0,0 );
	}
	return ( COLORREF ) - 1;
}


HICON CSPTransparentBitmap::ConvertToIcon() const
{
	if ( m_hBitmap == NULL )
	{
		return NULL;
	}

	COLORREF	crTransparent	= GetTransparentColor();

	BITMAP		bmp;
	if ( !::GetObject( m_hBitmap,sizeof( BITMAP ),&bmp ) )
	{
		return NULL;
	}

	if ( bmp.bmHeight == 0 || bmp.bmWidth == 0 )
	{
		return NULL;
	}

	CImageList	il;
	il.Create( bmp.bmWidth,bmp.bmHeight,ILC_COLOR24 | ILC_MASK,0,1 );
	il.Add( CBitmap::FromHandle( m_hBitmap ),crTransparent );

	ASSERT( il.GetImageCount() == 1 );

	return il.ExtractIcon( 0 );
}

//===========================================================================
// CSPClientCursorPos class
//===========================================================================

CSPClientCursorPos::CSPClientCursorPos( CWnd * pWnd )
{
	GetCursorPos( this );
	pWnd->ScreenToClient( this );
}

//===========================================================================
// CSPEmptyRect class
//===========================================================================

CSPEmptyRect::CSPEmptyRect()
{
	SetRectEmpty();
}

//===========================================================================
// CSPWindowRect class
//===========================================================================

CSPWindowRect::CSPWindowRect( HWND hWnd )
{
	if ( ::IsWindow( hWnd ) )
	{
		::GetWindowRect( hWnd,this );
	}
	else
	{
		SetRectEmpty();
	}
}

CSPWindowRect::CSPWindowRect( const CWnd * pWnd )
{
	if ( ::IsWindow( pWnd->GetSafeHwnd() ) )
	{
		::GetWindowRect( pWnd->GetSafeHwnd(),this );
	}
	else
	{
		SetRectEmpty();
	}
}

//===========================================================================
// CSPClientRect class
//===========================================================================

CSPClientRect::CSPClientRect( HWND hWnd )
{
	if ( ::IsWindow( hWnd ) )
	{
		::GetClientRect( hWnd,this );
	}
	else
	{
		SetRectEmpty();
	}
}

CSPClientRect::CSPClientRect( const CWnd * pWnd )
{
	if ( ::IsWindow( pWnd->GetSafeHwnd() ) )
	{
		::GetClientRect( pWnd->GetSafeHwnd(),this );
	}
	else
	{
		SetRectEmpty();
	}
}

//===========================================================================
// CSPBufferDC class
//===========================================================================

CSPBufferDC::CSPBufferDC( HDC hDestDC , const CRect rcPaint ) : m_hDestDC( hDestDC )
{
	m_rect = rcPaint;
	Attach( ::CreateCompatibleDC( m_hDestDC ) );
	m_bitmap.Attach( ::CreateCompatibleBitmap( m_hDestDC,m_rect.right,m_rect.bottom ) );
	m_hOldBitmap = ::SelectObject( m_hDC,m_bitmap );
}

CSPBufferDC::~CSPBufferDC()
{
	::BitBlt( m_hDestDC,m_rect.left,m_rect.top,m_rect.Width(),m_rect.Height(),m_hDC,m_rect.left,m_rect.top,SRCCOPY );
	::SelectObject( m_hDC,m_hOldBitmap );
}

CDC * CSPBufferDC::GetDestDC()
{
	return CDC::FromHandle( m_hDestDC );
}

//===========================================================================
// CSPFontDC class
//===========================================================================

CSPFontDC::CSPFontDC( CDC * pDC , CFont * pFont ) : m_hDC( pDC->GetSafeHdc() )
{
	m_hOldFont = SelectObject( m_hDC,pFont->GetSafeHandle() );
}

CSPFontDC::~CSPFontDC()
{
	::SelectObject( m_hDC,m_hOldFont );
}

void CSPFontDC::SetFont( CFont * pFont )
{
	::SelectObject( m_hDC,m_hOldFont );
	m_hOldFont = SelectObject( m_hDC,pFont->GetSafeHandle() );
}

//===========================================================================
// CSPPenDC class
//===========================================================================

CSPPenDC::CSPPenDC( HDC hDC , COLORREF crColor ) : m_hDC( hDC )
{
	VERIFY( m_pen.CreatePen( PS_SOLID,1,crColor ) );
	m_hOldPen = ( HPEN ) ::SelectObject( m_hDC,m_pen );
}

CSPPenDC::~CSPPenDC()
{
	::SelectObject( m_hDC,m_hOldPen );
}

void CSPPenDC::Color( COLORREF crColor )
{
	::SelectObject( m_hDC,m_hOldPen );
	VERIFY( m_pen.DeleteObject() );
	VERIFY( m_pen.CreatePen( PS_SOLID,1,crColor ) );
	m_hOldPen = ( HPEN ) ::SelectObject( m_hDC,m_pen );
}

COLORREF CSPPenDC::Color()
{
	LOGPEN	logPen;
	m_pen.GetLogPen( &logPen );
	return logPen.lopnColor;
}

//===========================================================================
// CSPBrushDC class
//===========================================================================

CSPBrushDC::CSPBrushDC( HDC hDC , COLORREF crColor ) : m_hDC( hDC )
{
	VERIFY( m_brush.CreateSolidBrush( crColor ) );
	m_hOldBrush = ( HBRUSH ) ::SelectObject( m_hDC,m_brush );
}

CSPBrushDC::~CSPBrushDC()
{
	::SelectObject( m_hDC,m_hOldBrush );
}

void CSPBrushDC::Color( COLORREF crColor )
{
	::SelectObject( m_hDC,m_hOldBrush );
	VERIFY( m_brush.DeleteObject() );
	VERIFY( m_brush.CreateSolidBrush( crColor ) );
	m_hOldBrush = ( HBRUSH ) ::SelectObject( m_hDC,m_brush );
}

//===========================================================================
// CSPCompatibleDC class
//===========================================================================

CSPCompatibleDC::CSPCompatibleDC( CDC * pDC , CBitmap * pBitmap )
{
	CreateCompatibleDC( pDC );
	m_pBmp = SelectObject( pBitmap );
}

CSPCompatibleDC::~CSPCompatibleDC()
{
	SelectObject( m_pBmp );
	DeleteDC();
}



//===========================================================================
// CSPSplitterTracker class
//===========================================================================
CSPSplitterTracker::CSPSplitterTracker( BOOL bSolid /*= FALSE*/ )
{
	m_bSolid = bSolid;
	m_rcBoundRect.SetRectEmpty();
}


void CSPSplitterTracker::OnInvertTracker( CRect rect )
{
	ASSERT( !rect.IsRectEmpty() );

	if ( m_bSolid )
	{
		m_pDC->InvertRect( rect );
	}
	else
	{
		CBrush *pDitherBrush	= CDC::GetHalftoneBrush();
		CBrush *pBrush			= ( CBrush * ) m_pDC->SelectObject( pDitherBrush );

		m_pDC->PatBlt( rect.left,rect.top,rect.Width(),rect.Height(),PATINVERT );
		m_pDC->SelectObject( pBrush );
	}
}

BOOL CSPSplitterTracker::Track( CWnd * pTrackWnd , CRect rcAvail , CRect & rectTracker , CPoint point , BOOL bHoriz )
{
	pTrackWnd->SetCapture();
	m_pDC = 0;

	CWnd *	pWnd	= CWnd::GetDesktopWindow();
	if ( pWnd->LockWindowUpdate() )
	{
		m_pDC = pWnd->GetDCEx( NULL,DCX_WINDOW | DCX_CACHE | DCX_LOCKWINDOWUPDATE );
	}
	else
	{
		m_pDC = pWnd->GetDCEx( NULL,DCX_WINDOW | DCX_CACHE );
	}
	ASSERT( m_pDC != NULL );

	CPoint	ptOffset	= bHoriz ? CPoint( rectTracker.left - point.x,0 ) : CPoint( 0,rectTracker.top - point.y );

	OnInvertTracker( rectTracker );

	if ( !m_rcBoundRect.IsRectEmpty() )
	{
		OnInvertTracker( m_rcBoundRect );
	}

	BOOL	bAccept	= FALSE;
	while ( CWnd::GetCapture() == pTrackWnd )
	{
		MSG	msg;
		if ( !GetMessage( &msg,NULL,0,0 ) )
			break;

		if ( msg.message == WM_MOUSEMOVE )
		{
			point = CPoint( msg.lParam );
			pTrackWnd->ClientToScreen( &point );
			point += ptOffset;

			point.x = max( min( point.x,rcAvail.right ),rcAvail.left );
			point.y = max( min( point.y,rcAvail.bottom ),rcAvail.top );

			if ( bHoriz )
			{
				if ( rectTracker.left != point.x )
				{
					OnInvertTracker( rectTracker );
					rectTracker.OffsetRect( point.x - rectTracker.left,0 );
					OnInvertTracker( rectTracker );
				}
			}
			else
			{
				if ( rectTracker.top != point.y )
				{
					OnInvertTracker( rectTracker );
					rectTracker.OffsetRect( 0,point.y - rectTracker.top );
					OnInvertTracker( rectTracker );
				}
			}
		}
		else if ( msg.message == WM_KEYDOWN && msg.wParam == VK_ESCAPE )
			break;
		else if ( msg.message == WM_LBUTTONUP )
		{
			bAccept = TRUE;
			break;
		}
		else
			::DispatchMessage( &msg );
	}

	if ( !m_rcBoundRect.IsRectEmpty() )
	{
		OnInvertTracker( m_rcBoundRect );
	}

	OnInvertTracker( rectTracker );

	if ( CWnd::GetCapture() == pTrackWnd )
	{
		ReleaseCapture();
	}
	pWnd = CWnd::GetDesktopWindow();
	pWnd->UnlockWindowUpdate();
	if ( m_pDC != NULL )
	{
		pWnd->ReleaseDC( m_pDC );
		m_pDC = NULL;
	}

	return bAccept;
}
//===========================================================================
// CSPDrawHelpers class
//===========================================================================

CSPDrawHelpers	CSPDrawHelpers::m_instance; // singleton

CSPDrawHelpers::CSPDrawHelpers() : m_hMsImgDll( NULL )
{
	m_pfnFastGradientFill = 0;
	m_hMsImgDll = ::LoadLibrary( _T( "msimg32.dll" ) );

	if ( m_hMsImgDll )
	{
		m_pfnFastGradientFill = ( PFNGRADIENTFILL ) GetProcAddress( m_hMsImgDll,"GradientFill" );
	}
}

CSPDrawHelpers::~CSPDrawHelpers()
{
	if ( m_hMsImgDll != NULL )
	{
		::FreeLibrary( m_hMsImgDll );
	}
}

BOOL CSPDrawHelpers::GradientFill( HDC hdc , PTRIVERTEX pVertex , ULONG dwNumVertex , PVOID pMesh , ULONG dwNumMesh , ULONG dwMode )
{
	if ( m_pfnFastGradientFill )
	{
		return ( *m_pfnFastGradientFill ) ( hdc,pVertex,dwNumVertex,pMesh,dwNumMesh,dwMode );
	}

	return FALSE;
}

void CSPDrawHelpers::GradientFillSlow( CDC * pDC , LPRECT lpRect , COLORREF crFrom , COLORREF crTo , BOOL bHorz )
{
	int		cx	= max( 1,lpRect->right - lpRect->left );
	int		cy	= max( 1,lpRect->bottom - lpRect->top );

	CRect	rc;
	pDC->GetClipBox( &rc );

	if ( rc.IsRectEmpty() )
	{
		rc = *lpRect;
	}
	else
	{
		rc.IntersectRect( rc,lpRect );
	}

	if ( bHorz )
	{
		for ( int nX = rc.left; nX < rc.right; nX++ )
		{
			pDC->FillSolidRect( nX,rc.top,1,rc.Height(),BlendColors( crFrom,crTo,( float ) ( 1.0 - ( ( nX - lpRect->left ) / ( float ) cx ) ) ) );
		}
	}
	else
	{
		for ( int nY = rc.top; nY < rc.bottom; nY++ )
		{
			pDC->FillSolidRect( rc.left,nY,rc.Width(),1,BlendColors( crFrom,crTo,( float ) ( 1.0 - ( ( nY - lpRect->top ) ) / ( float ) cy ) ) );
		}
	}
}

void CSPDrawHelpers::GradientFillFast( CDC * pDC , LPRECT lpRect , COLORREF crFrom , COLORREF crTo , BOOL bHorz )
{
	TRIVERTEX	vert[2];
	vert[0].x = lpRect->left;
	vert[0].y = lpRect->top;
	vert[0].Red = ( COLOR16 ) ( GetRValue( crFrom ) << 8 );
	vert[0].Green = ( COLOR16 ) ( GetGValue( crFrom ) << 8 );
	vert[0].Blue = ( COLOR16 ) ( GetBValue( crFrom ) << 8 );
	vert[0].Alpha = 0x0000;

	vert[1].x = lpRect->right;
	vert[1].y = lpRect->bottom;
	vert[1].Red = ( COLOR16 ) ( GetRValue( crTo ) << 8 );
	vert[1].Green = ( COLOR16 ) ( GetGValue( crTo ) << 8 );
	vert[1].Blue = ( COLOR16 ) ( GetBValue( crTo ) << 8 );
	vert[1].Alpha = 0x0000;

	GRADIENT_RECT	gRect	={0, 1};

	GradientFill( *pDC,vert,2,&gRect,1,bHorz ? GRADIENT_FILL_RECT_H : GRADIENT_FILL_RECT_V );
}

void CSPDrawHelpers::GradientFill( CDC * pDC , LPRECT lpRect , COLORREF crFrom , COLORREF crTo , BOOL bHorz )
{
	if ( !lpRect )
	{
		return;
	}

	if ( ::IsRectEmpty( lpRect ) )
	{
		return;
	}

	if ( IsLowResolution( pDC->GetSafeHdc() ) )
	{
		pDC->FillSolidRect( lpRect,crFrom );
	}
	else if ( crFrom == crTo )
	{
		pDC->FillSolidRect( lpRect,crFrom );
	}
	else if ( m_pfnFastGradientFill != NULL )
	{
		GradientFillFast( pDC,lpRect,crFrom,crTo,bHorz );
	}
	else
	{
		GradientFillSlow( pDC,lpRect,crFrom,crTo,bHorz );
	}
}

void CSPDrawHelpers::GradientFill( CDC * pDC , LPRECT lpRect , CSPPaintManagerColorGradient & grc , BOOL bHorz )
{
	GradientFill( pDC,lpRect,grc.clrLight,grc.clrDark,bHorz );
}

void CSPDrawHelpers::ExcludeCorners( CDC * pDC , CRect rc )
{
	pDC->ExcludeClipRect( rc.left,rc.top,rc.left + 1,rc.top + 1 );
	pDC->ExcludeClipRect( rc.right - 1,rc.top,rc.right,rc.top + 1 );
	pDC->ExcludeClipRect( rc.left,rc.bottom - 1,rc.left + 1,rc.bottom + 1 );
	pDC->ExcludeClipRect( rc.right - 1,rc.bottom - 1,rc.right,rc.bottom + 1 );
}

void CSPDrawHelpers::BlurPoints( CDC * pDC , LPPOINT pts , int nCount )
{
	for ( int i = 0; i < nCount; i += 2 )
	{
		CPoint		ptBlur			= pts[i];
		CPoint		ptDirection		( pts[i].x + pts[i + 1].x,pts[i].y + pts[i + 1].y );

		COLORREF	clrBlur			= pDC->GetPixel( ptDirection );
		COLORREF	clrDirection	= pDC->GetPixel( ptBlur );

		pDC->SetPixel( ptBlur,RGB( ( GetRValue( clrBlur ) + GetRValue( clrDirection ) ) / 2,( GetGValue( clrBlur ) + GetGValue( clrDirection ) ) / 2,( GetBValue( clrBlur ) + GetBValue( clrDirection ) ) / 2 ) );
	}
}

COLORREF CSPDrawHelpers::BlendColors( COLORREF crA , COLORREF crB , float fAmountA )
{
	BYTE	btR	= ( BYTE ) min( 255,( int ) ( GetRValue( crA ) * fAmountA + GetRValue( crB ) * ( 1.0f - fAmountA ) ) );
	BYTE	btG	= ( BYTE ) min( 255,( int ) ( GetGValue( crA ) * fAmountA + GetGValue( crB ) * ( 1.0f - fAmountA ) ) );
	BYTE	btB	= ( BYTE ) min( 255,( int ) ( GetBValue( crA ) * fAmountA + GetBValue( crB ) * ( 1.0f - fAmountA ) ) );

	return RGB( btR,btG,btB );
}

static int CALLBACK SPEnumFontFamExProc( ENUMLOGFONTEX * pelf , NEWTEXTMETRICEX* /*lpntm*/ , int /*FontType*/ , LPVOID pThis )
{
	CString	strFontName	= *( CString * ) pThis;
	CString	strFaceName	= pelf->elfLogFont.lfFaceName;

	if ( strFaceName.CompareNoCase( strFontName ) == 0 )
	{
		return 0;
	}

	return 1;
}

BOOL CSPDrawHelpers::FontExists( CString & strFaceName )
{
	// Enumerate all styles and charsets of all fonts:
	LOGFONT	lfEnum;
	::ZeroMemory( &lfEnum,sizeof( LOGFONT ) );

	lfEnum.lfFaceName[0] = 0;
	lfEnum.lfCharSet = DEFAULT_CHARSET;

	CWindowDC	dc	( NULL );

	return  ::EnumFontFamiliesEx( dc.m_hDC,&lfEnum,( FONTENUMPROC ) SPEnumFontFamExProc,( LPARAM ) & strFaceName,0 ) == 0;
}

CString CSPDrawHelpers::GetDefaultFontName()
{
	LOGFONT	lfFont;
	::GetObject( ::GetStockObject( DEFAULT_GUI_FONT ),sizeof( LOGFONT ),&lfFont );

	return CString( lfFont.lfFaceName );
}

CString CSPDrawHelpers::GetVerticalFontName( BOOL bUseOfficeFont )
{
	LOGFONT	lfFont;
	::GetObject( ::GetStockObject( DEFAULT_GUI_FONT ),sizeof( LOGFONT ),&lfFont );
	bool	bUseSystemFont	= lfFont.lfCharSet > SYMBOL_CHARSET;

	if ( bUseSystemFont )
	{
		OSVERSIONINFO	osvi;
		osvi.dwOSVersionInfoSize = sizeof( OSVERSIONINFO );
		VERIFY( GetVersionEx( &osvi ) );

		if ( !( ( osvi.dwPlatformId == VER_PLATFORM_WIN32_NT ) && ( osvi.dwMajorVersion > 4 ) ) )
			bUseSystemFont = FALSE;
	}


	CString	strOfficeFont		= _T( "Tahoma" );
	CString	strVerticalFaceName	= _T( "Arial" );

	if ( bUseSystemFont || !FontExists( strVerticalFaceName ) )
	{
		strVerticalFaceName = lfFont.lfFaceName;
	}
	else if ( bUseOfficeFont && !bUseSystemFont && FontExists( strOfficeFont ) )
	{
		strVerticalFaceName = strOfficeFont;
	}

	return strVerticalFaceName;
}

void CSPDrawHelpers::Triangle( CDC * pDC , CPoint pt0 , CPoint pt1 , CPoint pt2 , COLORREF clr )
{
	CSPPenDC	pen		( *pDC,clr );
	CSPBrushDC	brush	( *pDC,clr );

	Triangle( pDC,pt0,pt1,pt2 );
}

BOOL CSPDrawHelpers::IsLowResolution( HDC hDC/* = 0*/ )
{
	if ( hDC )
	{
		int	nColors	= ::GetDeviceCaps( hDC,BITSPIXEL );
		return ( nColors > 0 && nColors <= 8 );
	}
	hDC = ::GetDC( ::GetDesktopWindow() );
	if ( hDC )
	{
		int	nColors	= ::GetDeviceCaps( hDC,BITSPIXEL );
		::ReleaseDC( ::GetDesktopWindow(),hDC );
		return ( nColors > 0 && nColors <= 8 );
	}
	return FALSE;
}

SPCurrentSystemTheme CSPDrawHelpers::GetCurrentSystemTheme()
{
	return SPColorManager()->GetCurrentSystemTheme();
}


//=============================================================================
// Multi-Monitor API
//=============================================================================

class CSPMultiMonitor
{
protected:
	DECLARE_HANDLE( HMONITOR );

protected:
	typedef struct tagMONITORINFO
	{
		DWORD	cbSize;
		RECT	rcMonitor;
		RECT	rcWork;
		DWORD	dwFlags;
	} MONITORINFO, * LPMONITORINFO;

protected:
			CSPMultiMonitor();

protected:
	BOOL	InitMultipleMonitorStubs();

	CRect GetWorkArea( HMONITOR hMonitor )
	{
		if ( hMonitor && m_pfnGetMonitorInfo )
		{
			ASSERT( sizeof( MONITORINFO ) == 40 );

			MONITORINFO	info;
			info.cbSize = sizeof( MONITORINFO );

			if ( m_pfnGetMonitorInfo( hMonitor,( MONITORINFO * ) &info ) )
				return info.rcWork;
		}

		RECT	rcWork;
		::SystemParametersInfo( SPI_GETWORKAREA,NULL,&rcWork,0 );
		return rcWork;
	}

public:

	CRect GetWorkArea( HWND hWnd )
	{
		return GetWorkArea( InitMultipleMonitorStubs() ? m_pfnMonitorFromWindow( hWnd,0 ) : 0 );
	}
	CRect GetWorkArea( POINT ptScreenCoords )
	{
		return GetWorkArea( InitMultipleMonitorStubs() ? m_pfnMonitorFromPoint( ptScreenCoords,0 ) : 0 );
	}
	CRect GetWorkArea( LPCRECT lprcScreenCoords )
	{
		return GetWorkArea( InitMultipleMonitorStubs() ? m_pfnMonitorFromRect( lprcScreenCoords,0 ) : 0 );
	}



protected:
	int 	 ( WINAPI* m_pfnGetSystemMetrics )( int );
	HMONITOR ( WINAPI* m_pfnMonitorFromWindow )( HWND , DWORD );
	HMONITOR ( WINAPI* m_pfnMonitorFromRect )( LPCRECT , DWORD );
	HMONITOR ( WINAPI* m_pfnMonitorFromPoint )( POINT , DWORD );
	BOOL	 ( WINAPI* m_pfnGetMonitorInfo )( HMONITOR , LPMONITORINFO );
	BOOL					m_fMultiMonInitDone;

public:
	static CSPMultiMonitor	s_monInstance;
};

CSPMultiMonitor			CSPMultiMonitor::s_monInstance;

CSPMultiMonitor::CSPMultiMonitor()
{
	m_fMultiMonInitDone = FALSE;
}


BOOL CSPMultiMonitor::InitMultipleMonitorStubs()
{
	if ( m_fMultiMonInitDone )
	{
		return m_pfnGetMonitorInfo != NULL;
	}

#ifdef UNICODE
	OSVERSIONINFO	osvi	={0};
	osvi.dwOSVersionInfoSize = sizeof( osvi );
	GetVersionEx( &osvi );
	BOOL	fMultimonPlatformNT	= ( VER_PLATFORM_WIN32_NT == osvi.dwPlatformId );
#endif

	HMODULE	hUser32				= GetModuleHandle( TEXT( "USER32" ) );
	if ( hUser32 && ( *( FARPROC * ) &m_pfnGetSystemMetrics = GetProcAddress( hUser32,"GetSystemMetrics" ) ) != NULL && ( *( FARPROC * ) &m_pfnMonitorFromWindow = GetProcAddress( hUser32,"MonitorFromWindow" ) ) != NULL && ( *( FARPROC * ) &m_pfnMonitorFromRect = GetProcAddress( hUser32,"MonitorFromRect" ) ) != NULL && ( *( FARPROC * ) &m_pfnMonitorFromPoint = GetProcAddress( hUser32,"MonitorFromPoint" ) ) != NULL && 
#ifdef UNICODE
		( *( FARPROC * ) &m_pfnGetMonitorInfo = fMultimonPlatformNT ? GetProcAddress( hUser32,"GetMonitorInfoW" ) : GetProcAddress( hUser32,"GetMonitorInfoA" ) ) != NULL
#else
		( *( FARPROC * ) &m_pfnGetMonitorInfo = GetProcAddress( hUser32,"GetMonitorInfoA" ) ) != NULL
#endif
	   )
	{
		m_fMultiMonInitDone = TRUE;
		return TRUE;
	}
	else
	{
		m_pfnGetSystemMetrics = NULL;
		m_pfnMonitorFromWindow = NULL;
		m_pfnMonitorFromRect = NULL;
		m_pfnMonitorFromPoint = NULL;
		m_pfnGetMonitorInfo = NULL;

		m_fMultiMonInitDone = TRUE;
		return FALSE;
	}
}


CRect CSPDrawHelpers::GetWorkArea( const CRect & rect )
{
	return CSPMultiMonitor::s_monInstance.GetWorkArea( rect );
}

CRect CSPDrawHelpers::GetWorkArea( const CWnd * pWnd )
{
	ASSERT_VALID( pWnd );

	return CSPMultiMonitor::s_monInstance.GetWorkArea( pWnd->GetSafeHwnd() );
}

CRect CSPDrawHelpers::GetWorkArea()
{
	POINT	point;
	::GetCursorPos( &point );

	return CSPMultiMonitor::s_monInstance.GetWorkArea( point );
}