sc/source/ui/view/drawutil.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 #include <vcl/outdev.hxx>
  21
  22 #include "drawutil.hxx"
  23 #include "document.hxx"
  24 #include "global.hxx"
  25 #include "viewdata.hxx"
  26
  27
  28 void ScDrawUtil::CalcScale( ScDocument* pDoc, SCTAB nTab,
  29                             SCCOL nStartCol, SCROW nStartRow, SCCOL nEndCol, SCROW nEndRow,
  30                             OutputDevice* pDev,
  31                             const Fraction& rZoomX, const Fraction& rZoomY,
  32                             double nPPTX, double nPPTY,
  33                             Fraction& rScaleX, Fraction& rScaleY )
  34 {
  35     long nPixelX = 0;
  36     long nTwipsX = 0;
  37     long nPixelY = 0;
  38     long nTwipsY = 0;
  39     for (SCCOL i=nStartCol; i<nEndCol; i++)
  40     {
  41         sal_uInt16 nWidth = pDoc->GetColWidth(i,nTab);
  42         nTwipsX += (long) nWidth;
  43         nPixelX += ScViewData::ToPixel( nWidth, nPPTX );
  44     }
  45
  46     for (SCROW nRow = nStartRow; nRow <= nEndRow-1; ++nRow)
  47     {
  48         SCROW nLastRow = nRow;
  49         if (pDoc->RowHidden(nRow, nTab, NULL, &nLastRow))
  50         {
  51             nRow = nLastRow;
  52             continue;
  53         }
  54
  55         sal_uInt16 nHeight = pDoc->GetRowHeight(nRow, nTab);
  56         nTwipsY += static_cast<long>(nHeight);
  57         nPixelY += ScViewData::ToPixel(nHeight, nPPTY);
  58     }
  59
  60     MapMode aHMMMode( MAP_100TH_MM, Point(), rZoomX, rZoomY );
  61     Point aPixelLog = pDev->PixelToLogic( Point( nPixelX,nPixelY ), aHMMMode );
  62
  63     //  Fraction(double) ctor can be used here (and avoid overflows of PixelLog * Zoom)
  64     //  because ReduceInaccurate is called later anyway.
  65
  66     if ( aPixelLog.X() && nTwipsX )
  67         rScaleX = Fraction( ((double)aPixelLog.X()) *
  68                             ((double)rZoomX.GetNumerator()) /
  69                             ((double)nTwipsX) /
  70                             ((double)HMM_PER_TWIPS) /
  71                             ((double)rZoomX.GetDenominator()) );
  72     else
  73         rScaleX = Fraction( 1, 1 );
  74
  75     if ( aPixelLog.Y() && nTwipsY )
  76         rScaleY = Fraction( ((double)aPixelLog.Y()) *
  77                             ((double)rZoomY.GetNumerator()) /
  78                             ((double)nTwipsY) /
  79                             ((double)HMM_PER_TWIPS) /
  80                             ((double)rZoomY.GetDenominator()) );
  81     else
  82         rScaleY = Fraction( 1, 1 );
  83
  84     //  25 bits of accuracy are needed to always hit the right part of
  85     //  cells in the last rows (was 17 before 1M rows).
  86     rScaleX.ReduceInaccurate( 25 );
  87     rScaleY.ReduceInaccurate( 25 );
  88 }
  89
  90
  91
  92
  93 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */