Hi,
I have improved DrawMultiLineText of PdfPainter little bit and the output is
better. Here is my updated version:
void PdfPainter::DrawMultiLineText( double dX, double dY, double dWidth, double
dHeight, const PdfString & rsText,
EPdfAlignment eAlignment,
EPdfVerticalAlignment eVertical )
{
PODOFO_RAISE_LOGIC_IF( !m_pCanvas, "Call SetPage() first before doing
drawing operations." );
if( !m_pFont || !m_pPage || !rsText.IsValid() )
{
PODOFO_RAISE_ERROR( ePdfError_InvalidHandle );
}
// Peter Petrov 25 September 2008
m_pFont->EmbedFont();
if( dWidth <= 0.0 || dHeight <= 0.0 ) // nonsense arguments
return;
TLineElement tLine;
std::vector<TLineElement> vecLines;
this->Save();
this->SetClipRect( dX, dY, dWidth, dHeight );
PdfString sString = this->ExpandTabs( rsText,
rsText.GetCharacterLength() );
tLine.pszStart = sString.GetString();
const char* pszEnd = tLine.pszStart;
const char* pszWord = tLine.pszStart;
double dCurWidth = 0.0;
// do simple word wrapping
// TODO: Use better algorithm!
while( *pszEnd )
{
dCurWidth += m_pFont->GetFontMetrics()->CharWidth( *pszEnd );
if( *pszEnd == '\n' ) // hard-break!
{
++pszEnd; // skip the line feed
tLine.lLen = pszEnd - tLine.pszStart;
vecLines.push_back( tLine );
tLine.pszStart = pszEnd;
dCurWidth = 0.0;
}
else if( isspace( static_cast<unsigned int>(static_cast<unsigned
char>(*pszEnd)) ) ||
ispunct( static_cast<unsigned int>(static_cast<unsigned
char>(*pszEnd)) ))
pszWord = pszEnd;
if( dCurWidth > dWidth )
{
// The last word does not fit anymore in the current line.
// -> Move it to the next one.
// skip leading whitespaces!
while( *tLine.pszStart && isspace( static_cast<unsigned
int>(static_cast<unsigned char>(*tLine.pszStart)) ) )
++tLine.pszStart;
tLine.lLen = /*pszEnd*/pszWord - tLine.pszStart + 1;
vecLines.push_back( tLine );
tLine.pszStart = pszWord + 1;
dCurWidth = pszEnd-pszWord > 0 ?
m_pFont->GetFontMetrics()->StringWidth( pszWord+1,
pszEnd-pszWord-1 ) : 0.0;
}
++pszEnd;
}
if( pszEnd-tLine.pszStart > 0 )
{
tLine.lLen = pszEnd - tLine.pszStart;
vecLines.push_back( tLine );
}
// Do vertical alignment
switch( eVertical )
{
default:
case ePdfVerticalAlignment_Top:
dY += dHeight; break;
case ePdfVerticalAlignment_Bottom:
dY += m_pFont->GetFontMetrics()->GetLineSpacing() *
vecLines.size(); break;
case ePdfVerticalAlignment_Center:
dY += (dHeight -
((dHeight - (m_pFont->GetFontMetrics()->GetLineSpacing() *
vecLines.size()))/2.0));
break;
}
std::vector<TLineElement>::const_iterator it = vecLines.begin();
while( it != vecLines.end() )
{
dY -= m_pFont->GetFontMetrics()->GetLineSpacing();
if( (*it).pszStart )
this->DrawTextAligned( dX, dY, dWidth, PdfString( (*it).pszStart,
(*it).lLen ), eAlignment );
++it;
}
this->Restore();
}
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