Re: How to print a graph/document using Metafile ?

Hi,

I have an MFC code written for printing a graph/document from my
application
to the printer directly. It is identifying the printer, and the document
gets
initialised in the printer spool, but it is not printing. When i check
the
data size of the spool document it shows 0 bytes!. As the same time, if i
try to paste manually the data on Paint, I am getting the required output
in
paint. ( ie. data is available on the Clipboard but not getting printed)

Can anybody help me in resolving this at the earliest.

Thanks in advance.
/////////////////////////////////////////////////////////////////////////////
void CGraphDisplayWnd::PrintGraph( void )
{
AssertValid();

GLOBALHANDLE hGMem = NULL;
LPMETAFILEPICT lpmfp = NULL;
HMETAFILE hMetaFile = NULL;
BOOL bBlackWhite= TRUE;
int nMapMode = 0;
int nyExt = 0;
int nxExt = 0;
double dAspect = 0.0;
CDC DC;
PRINTDLG PrintDlg;
CWQSApp* pApp = GetWQSAppPtr();

if( !pApp->GetPrinterDeviceDefaults( &PrintDlg ) )
{
TRACE( "Could not get printer defaults!\n" );
return;
}

if( !pApp->CreatePrinterDC( DC ) )
{
TRACE( "Could not open the printer!\n" );
return;
}

if( PrintDlg.hDevMode != NULL )
{
LPDEVMODE DevMode = (LPDEVMODE)GlobalLock( PrintDlg.hDevMode );
if( DevMode != NULL )
{
ASSERT( DevMode != NULL );

if( DevMode->dmColor != DMCOLOR_MONOCHROME )
bBlackWhite = FALSE;
}
GlobalUnlock( PrintDlg.hDevMode );
}

int nSize = 35;

// Copy Graph to Clipboard.
GSUseView( m_nGraphNum, 0 );
GSWinPaint( WPMETAFILE );
GSWinPaint( WPMANUAL );
m_nBKColor = LIGHT+WHITE;
if( bBlackWhite )
{
m_Graph.SetSymbolSize( nSize );
m_Legend.SetMode( 16 );
m_Graph.SetMode( TRUE );
}
UpDateGraph();
GSClipWrite( 0,0,0,0, CBWMF, 0 );
GSWinPaint(WPBITMAP);
GSWinPaint(WPMANUAL);
if( bBlackWhite )
{
m_Graph.SetSymbolSize( 25 );
m_Legend.SetMode( 0 );
m_Graph.SetMode( FALSE );
}
m_nBKColor = WHITE;
UpDateGraph();

// Get Metafile off of Clipboard.
OpenClipboard();

hGMem = GetClipboardData( CF_METAFILEPICT );
if( hGMem != NULL )
{
lpmfp = (LPMETAFILEPICT)GlobalLock( hGMem );
if( lpmfp != NULL )
{
hMetaFile = CopyMetaFile( lpmfp->hMF, NULL );
if( hMetaFile == NULL )
{
GlobalUnlock( hGMem );
CloseClipboard();
return;
}

nMapMode = lpmfp->mm;
nxExt = lpmfp->xExt;
nyExt = lpmfp->yExt;
dAspect = (double)lpmfp->yExt / (double)lpmfp->xExt;
GlobalUnlock( hGMem );
}
}

CloseClipboard();

if( hMetaFile == NULL ) return;

// Get # of pixels per inch.
double dXPixsInch = DC.GetDeviceCaps( LOGPIXELSX );
double dYPixsInch = DC.GetDeviceCaps( LOGPIXELSY );

// Get # of Pixels printer display area.
double dXRes = DC.GetDeviceCaps( HORZRES );
double dYRes = DC.GetDeviceCaps( VERTRES );

// Get # of mm in printers display area.
double dXSize = DC.GetDeviceCaps( HORZSIZE );
double dYSize = DC.GetDeviceCaps( VERTSIZE );

// Get # of mm in the graph.
double dXNumMm = (double)nxExt / 100.0;
double dYNumMm = (double)nyExt / 100.0;

// Get # of pixels per mm.
double dXPixsMm = dXRes / dXSize;
double dYPixsMm = dYRes / dYSize;

dYSize -= 12.7;

double dXRatio = dXSize / dXNumMm;
double dYRatio = dYSize / dYNumMm;

// Get the X,Y extents.
double dXExt = dXRatio * dXNumMm * dXPixsMm;
double dYExt = dYRatio * dYNumMm * dYPixsMm;

DOCINFO JobInfo;
memset( &JobInfo, 0, sizeof(DOCINFO) );
   JobInfo.cbSize = sizeof(JobInfo);
JobInfo.lpszDocName = "WQS Graph";

if( DC.StartDoc( &JobInfo ) == -1 )
TRACE("ERROR: StartDoc\n" );

if( DC.StartPage() == -1 )
TRACE("ERROR: StartPage\n" );

DC.SaveDC() ;
DC.SetMapMode( nMapMode );
DC.SetWindowOrg( 0,0);
DC.SetWindowExt( (int) dXExt, (int)dYExt );
DC.SetViewportOrg( 0, (int)(dYPixsInch/2.0) );
DC.SetViewportExt( (int)dXExt, (int)dYExt );
EnumMetaFile( DC.GetSafeHdc(), hMetaFile, EnumMetaProc, NULL );
DC.RestoreDC( -1 );
ReleaseDC( &DC );

if( DC.EndPage() == -1 )
TRACE("ERROR: EndPage\n" );

if( DC.EndDoc() == -1 )
TRACE("ERROR: EndDoc\n" );

DeleteMetaFile( hMetaFile );
}
/////////////////////////////////////////////////////////////////////////////