LibreOffice Module sc (master)  1
drawutil.cxx
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1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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15  * License, Version 2.0 (the "License"); you may not use this file
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17  * the License at http://www.apache.org/licenses/LICENSE-2.0 .
18  */
19 
20 #include <sal/config.h>
21 
22 #include <o3tl/unit_conversion.hxx>
23 #include <vcl/outdev.hxx>
24 
25 #include <drawutil.hxx>
26 #include <document.hxx>
27 #include <viewdata.hxx>
28 
29 void ScDrawUtil::CalcScale( const ScDocument& rDoc, SCTAB nTab,
30  SCCOL nStartCol, SCROW nStartRow, SCCOL nEndCol, SCROW nEndRow,
31  const OutputDevice* pDev,
32  const Fraction& rZoomX, const Fraction& rZoomY,
33  double nPPTX, double nPPTY,
34  Fraction& rScaleX, Fraction& rScaleY )
35 {
36  tools::Long nPixelX = 0;
37  tools::Long nTwipsX = 0;
38  tools::Long nPixelY = 0;
39  tools::Long nTwipsY = 0;
40  for (SCCOL i=nStartCol; i<nEndCol; i++)
41  {
42  sal_uInt16 nWidth = rDoc.GetColWidth(i,nTab);
43  nTwipsX += static_cast<tools::Long>(nWidth);
44  nPixelX += ScViewData::ToPixel( nWidth, nPPTX );
45  }
46 
47  for (SCROW nRow = nStartRow; nRow <= nEndRow-1; ++nRow)
48  {
49  SCROW nLastRow = nRow;
50  if (rDoc.RowHidden(nRow, nTab, nullptr, &nLastRow))
51  {
52  nRow = nLastRow;
53  continue;
54  }
55 
56  sal_uInt16 nHeight = rDoc.GetRowHeight(nRow, nTab);
57  nTwipsY += static_cast<tools::Long>(nHeight);
58  nPixelY += ScViewData::ToPixel(nHeight, nPPTY);
59  }
60 
61  MapMode aHMMMode( MapUnit::Map100thMM, Point(), rZoomX, rZoomY );
62  Point aPixelLog = pDev->PixelToLogic( Point( nPixelX,nPixelY ), aHMMMode );
63 
64  // Fraction(double) ctor can be used here (and avoid overflows of PixelLog * Zoom)
65  // because ReduceInaccurate is called later anyway.
66 
67  if ( aPixelLog.X() && nTwipsX )
68  rScaleX = Fraction( static_cast<double>(aPixelLog.X()) *
69  static_cast<double>(rZoomX.GetNumerator()) /
70  o3tl::convert<double>(nTwipsX, o3tl::Length::twip, o3tl::Length::mm100) /
71  static_cast<double>(rZoomX.GetDenominator()) );
72  else
73  rScaleX = Fraction( 1, 1 );
74 
75  if ( aPixelLog.Y() && nTwipsY )
76  rScaleY = Fraction( static_cast<double>(aPixelLog.Y()) *
77  static_cast<double>(rZoomY.GetNumerator()) /
78  o3tl::convert<double>(nTwipsY, o3tl::Length::twip, o3tl::Length::mm100) /
79  static_cast<double>(rZoomY.GetDenominator()) );
80  else
81  rScaleY = Fraction( 1, 1 );
82 
83  // 25 bits of accuracy are needed to always hit the right part of
84  // cells in the last rows (was 17 before 1M rows).
85  rScaleX.ReduceInaccurate( 25 );
86  rScaleY.ReduceInaccurate( 25 );
87 }
88 
89 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */
constexpr double nPPTY
long Long
SC_DLLPUBLIC sal_uInt16 GetRowHeight(SCROW nRow, SCTAB nTab, bool bHiddenAsZero=true) const
Definition: document.cxx:4211
static tools::Long ToPixel(sal_uInt16 nTwips, double nFactor)
Definition: viewdata.hxx:700
constexpr double nPPTX
void ReduceInaccurate(unsigned nSignificantBits)
int i
sal_Int16 SCCOL
Definition: types.hxx:21
SAL_WARN_UNUSED_RESULT Point PixelToLogic(const Point &rDevicePt) const
sal_Int32 SCROW
Definition: types.hxx:17
sal_Int32 GetDenominator() const
sal_Int32 GetNumerator() const
SC_DLLPUBLIC bool RowHidden(SCROW nRow, SCTAB nTab, SCROW *pFirstRow=nullptr, SCROW *pLastRow=nullptr) const
Definition: document.cxx:4479
SC_DLLPUBLIC sal_uInt16 GetColWidth(SCCOL nCol, SCTAB nTab, bool bHiddenAsZero=true) const
Definition: document.cxx:4170
static void CalcScale(const ScDocument &rDoc, SCTAB nTab, SCCOL nStartCol, SCROW nStartRow, SCCOL nEndCol, SCROW nEndRow, const OutputDevice *pDev, const Fraction &rZoomX, const Fraction &rZoomY, double nPPTX, double nPPTY, Fraction &rScaleX, Fraction &rScaleY)
Definition: drawutil.cxx:29
sal_Int16 SCTAB
Definition: types.hxx:22