sc/source/ui/view/drawutil.cxx

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  30
  31 // MARKER(update_precomp.py): autogen include statement, do not remove
  32 #include "precompiled_sc.hxx"
  33
  34
  35
  36 // INCLUDE ---------------------------------------------------------------
  37
  38 #include <vcl/outdev.hxx>
  39
  40 #include "drawutil.hxx"
  41 #include "document.hxx"
  42 #include "global.hxx"
  43 #include "viewdata.hxx"
  44
  45 // STATIC DATA -----------------------------------------------------------
  46
  47 // -----------------------------------------------------------------------
  48
  49
  50 inline Fraction MakeFraction( long nA, long nB )
  51 {
  52     return ( nA && nB ) ? Fraction(nA,nB) : Fraction(1,1);
  53 }
  54
  55 void ScDrawUtil::CalcScale( ScDocument* pDoc, SCTAB nTab,
  56                             SCCOL nStartCol, SCROW nStartRow, SCCOL nEndCol, SCROW nEndRow,
  57                             OutputDevice* pDev,
  58                             const Fraction& rZoomX, const Fraction& rZoomY,
  59                             double nPPTX, double nPPTY,
  60                             Fraction& rScaleX, Fraction& rScaleY )
  61 {
  62     long nPixelX = 0;
  63     long nTwipsX = 0;
  64     long nPixelY = 0;
  65     long nTwipsY = 0;
  66     for (SCCOL i=nStartCol; i<nEndCol; i++)
  67     {
  68         USHORT nWidth = pDoc->GetColWidth(i,nTab);
  69         nTwipsX += (long) nWidth;
  70         nPixelX += ScViewData::ToPixel( nWidth, nPPTX );
  71     }
  72
  73     for (SCROW nRow = nStartRow; nRow <= nEndRow-1; ++nRow)
  74     {
  75         SCROW nLastRow = nRow;
  76         if (pDoc->RowHidden(nRow, nTab, NULL, &nLastRow))
  77         {
  78             nRow = nLastRow;
  79             continue;
  80         }
  81
  82         USHORT nHeight = pDoc->GetRowHeight(nRow, nTab);
  83         nTwipsY += static_cast<long>(nHeight);
  84         nPixelY += ScViewData::ToPixel(nHeight, nPPTY);
  85     }
  86
  87     MapMode aHMMMode( MAP_100TH_MM, Point(), rZoomX, rZoomY );
  88     Point aPixelLog = pDev->PixelToLogic( Point( nPixelX,nPixelY ), aHMMMode );
  89
  90     //  Fraction(double) ctor can be used here (and avoid overflows of PixelLog * Zoom)
  91     //  because ReduceInaccurate is called later anyway.
  92
  93     if ( aPixelLog.X() && nTwipsX )
  94         rScaleX = Fraction( ((double)aPixelLog.X()) *
  95                             ((double)rZoomX.GetNumerator()) /
  96                             ((double)nTwipsX) /
  97                             ((double)HMM_PER_TWIPS) /
  98                             ((double)rZoomX.GetDenominator()) );
  99     else
 100         rScaleX = Fraction( 1, 1 );
 101
 102     if ( aPixelLog.Y() && nTwipsY )
 103         rScaleY = Fraction( ((double)aPixelLog.Y()) *
 104                             ((double)rZoomY.GetNumerator()) /
 105                             ((double)nTwipsY) /
 106                             ((double)HMM_PER_TWIPS) /
 107                             ((double)rZoomY.GetDenominator()) );
 108     else
 109         rScaleY = Fraction( 1, 1 );
 110
 111     //  17 bits of accuracy are needed to always hit the right part of
 112     //  cells in the last rows
 113     rScaleX.ReduceInaccurate( 17 );
 114     rScaleY.ReduceInaccurate( 17 );
 115 }
 116
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 119