src/common/radiocmn.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/radiocmn.cpp
   3 // Purpose:     wxRadioBox methods common to all ports
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     03.06.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // License:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_RADIOBOX
  28
  29 #ifndef WX_PRECOMP
  30     #include "wx/radiobox.h"
  31 #endif //WX_PRECOMP
  32
  33 // ============================================================================
  34 // implementation
  35 // ============================================================================
  36
  37 void wxRadioBoxBase::SetMajorDim(int majorDim, long style)
  38 {
  39     wxCHECK_RET( majorDim != 0, _T("major radiobox dimension can't be 0") );
  40
  41     m_majorDim = majorDim;
  42
  43     int minorDim = (GetCount() + m_majorDim - 1) / m_majorDim;
  44
  45     if ( style & wxRA_SPECIFY_COLS )
  46     {
  47         m_numCols = majorDim;
  48         m_numRows = minorDim;
  49     }
  50     else // wxRA_SPECIFY_ROWS
  51     {
  52         m_numCols = minorDim;
  53         m_numRows = majorDim;
  54     }
  55 }
  56
  57 int wxRadioBoxBase::GetNextItem(int item, wxDirection dir, long style) const
  58 {
  59     int count = GetCount(),
  60         numCols = GetColumnCount(),
  61         numRows = GetRowCount();
  62
  63     bool horz = (style & wxRA_SPECIFY_COLS) != 0;
  64
  65     switch ( dir )
  66     {
  67         case wxUP:
  68             if ( horz )
  69             {
  70                 item -= numCols;
  71             }
  72             else // vertical layout
  73             {
  74                 if ( !item-- )
  75                     item = count - 1;
  76             }
  77             break;
  78
  79         case wxLEFT:
  80             if ( horz )
  81             {
  82                 if ( !item-- )
  83                     item = count - 1;
  84             }
  85             else // vertical layout
  86             {
  87                 item -= numRows;
  88             }
  89             break;
  90
  91         case wxDOWN:
  92             if ( horz )
  93             {
  94                 item += numCols;
  95             }
  96             else // vertical layout
  97             {
  98                 if ( ++item == count )
  99                     item = 0;
 100             }
 101             break;
 102
 103         case wxRIGHT:
 104             if ( horz )
 105             {
 106                 if ( ++item == count )
 107                     item = 0;
 108             }
 109             else // vertical layout
 110             {
 111                 item += numRows;
 112             }
 113             break;
 114
 115         default:
 116             wxFAIL_MSG( _T("unexpected wxDirection value") );
 117             return wxNOT_FOUND;
 118     }
 119
 120     // ensure that the item is in range [0..count)
 121     if ( item < 0 )
 122     {
 123         // first map the item to the one in the same column but in the last row
 124         item += count;
 125
 126         // now there are 2 cases: either it is the first item of the last row
 127         // in which case we need to wrap again and get to the last item or we
 128         // can just go to the previous item
 129         if ( item % (horz ? numCols : numRows) )
 130             item--;
 131         else
 132             item = count - 1;
 133     }
 134     else if ( item >= count )
 135     {
 136         // same logic as above
 137         item -= count;
 138
 139         // ... except that we need to check if this is not the last item, not
 140         // the first one
 141         if ( (item + 1) % (horz ? numCols : numRows) )
 142             item++;
 143         else
 144             item = 0;
 145     }
 146
 147     wxASSERT_MSG( item < count && item >= 0,
 148                   _T("logic error in wxRadioBox::GetNextItem()") );
 149
 150     return item;
 151 }
 152
 153 #if WXWIN_COMPATIBILITY_2_4
 154
 155 // these functions are deprecated and don't do anything
 156 int wxRadioBoxBase::GetNumberOfRowsOrCols() const
 157 {
 158     return 1;
 159 }
 160
 161 void wxRadioBoxBase::SetNumberOfRowsOrCols(int WXUNUSED(n))
 162 {
 163 }
 164
 165 #endif // WXWIN_COMPATIBILITY_2_4
 166
 167 #endif // wxUSE_RADIOBOX