sc/source/ui/view/gridmerg.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 "gridmerg.hxx"
  23
  24 //------------------------------------------------------------------
  25
  26 ScGridMerger::ScGridMerger( OutputDevice* pOutDev, long nOnePixelX, long nOnePixelY ) :
  27     pDev( pOutDev ),
  28     nOneX( nOnePixelX ),
  29     nOneY( nOnePixelY ),
  30     nCount( 0 ),
  31     bVertical( false )
  32 {
  33     //  optimize (DrawGrid) only for pixel MapMode,
  34     //  to avoid rounding errors
  35
  36     bOptimize = ( pDev->GetMapMode().GetMapUnit() == MAP_PIXEL );
  37 }
  38
  39 ScGridMerger::~ScGridMerger()
  40 {
  41     Flush();
  42 }
  43
  44 void ScGridMerger::AddLine( long nStart, long nEnd, long nPos )
  45 {
  46     if ( nCount )
  47     {
  48         //  not first line - test fix position
  49         //  more than one previous line - test distance
  50
  51         if ( nStart != nFixStart || nEnd != nFixEnd )
  52         {
  53             if ( nCount == 1 && nPos == nVarStart &&
  54                     ( nStart == nFixEnd ||
  55                         nStart == nFixEnd + ( bVertical ? nOneY : nOneX ) ) )
  56             {
  57                 //  additional optimization: extend connected lines
  58                 //  keep nCount at 1
  59                 nFixEnd = nEnd;
  60             }
  61             else
  62                 Flush();
  63         }
  64         else if ( nCount == 1 )
  65         {
  66             nVarDiff = nPos - nVarStart;
  67             ++nCount;
  68         }
  69         else if ( nPos != nVarStart + nCount * nVarDiff )       //! keep VarEnd?
  70             Flush();
  71         else
  72             ++nCount;
  73     }
  74
  75     if ( !nCount )
  76     {
  77         //  first line (or flushed above) - just store
  78
  79         nFixStart = nStart;
  80         nFixEnd   = nEnd;
  81         nVarStart = nPos;
  82         nVarDiff  = 0;
  83         nCount    = 1;
  84     }
  85 }
  86
  87 void ScGridMerger::AddHorLine( long nX1, long nX2, long nY )
  88 {
  89     if ( bOptimize )
  90     {
  91         if ( bVertical )
  92         {
  93             Flush();
  94             bVertical = false;
  95         }
  96         AddLine( nX1, nX2, nY );
  97     }
  98     else
  99         pDev->DrawLine( Point( nX1, nY ), Point( nX2, nY ) );
 100 }
 101
 102 void ScGridMerger::AddVerLine( long nX, long nY1, long nY2 )
 103 {
 104     if ( bOptimize )
 105     {
 106         if ( !bVertical )
 107         {
 108             Flush();
 109             bVertical = sal_True;
 110         }
 111         AddLine( nY1, nY2, nX );
 112     }
 113     else
 114         pDev->DrawLine( Point( nX, nY1 ), Point( nX, nY2 ) );
 115 }
 116
 117 void ScGridMerger::Flush()
 118 {
 119     if (nCount)
 120     {
 121         if (bVertical)
 122         {
 123             if ( nCount == 1 )
 124                 pDev->DrawLine( Point( nVarStart, nFixStart ), Point( nVarStart, nFixEnd ) );
 125             else
 126             {
 127                 long nVarEnd = nVarStart + ( nCount - 1 ) * nVarDiff;
 128                 if ( nVarDiff < 0 )
 129                 {
 130                     //  nVarDiff is negative in RTL layout mode
 131                     //  Change the positions so DrawGrid is called with a positive distance
 132                     //  (nVarStart / nVarDiff can be modified, aren't used after Flush)
 133
 134                     nVarDiff = -nVarDiff;
 135                     long nTemp = nVarStart;
 136                     nVarStart = nVarEnd;
 137                     nVarEnd = nTemp;
 138                 }
 139                 pDev->DrawGrid( Rectangle( nVarStart, nFixStart, nVarEnd, nFixEnd ),
 140                                 Size( nVarDiff, nFixEnd - nFixStart ),
 141                                 GRID_VERTLINES );
 142             }
 143         }
 144         else
 145         {
 146             if ( nCount == 1 )
 147                 pDev->DrawLine( Point( nFixStart, nVarStart ), Point( nFixEnd, nVarStart ) );
 148             else
 149             {
 150                 long nVarEnd = nVarStart + ( nCount - 1 ) * nVarDiff;
 151                 pDev->DrawGrid( Rectangle( nFixStart, nVarStart, nFixEnd, nVarEnd ),
 152                                 Size( nFixEnd - nFixStart, nVarDiff ),
 153                                 GRID_HORZLINES );
 154             }
 155         }
 156         nCount = 0;
 157     }
 158 }
 159
 160
 161
 162 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */