src/common/statbar.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/statbar.cpp
   3 // Purpose:     wxStatusBarBase implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     14.10.01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // License:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "statbar.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/statusbr.h"
  33 #endif //WX_PRECOMP
  34
  35 #if wxUSE_STATUSBAR
  36
  37 // ============================================================================
  38 // wxStatusBarBase implementation
  39 // ============================================================================
  40
  41 IMPLEMENT_DYNAMIC_CLASS(wxStatusBar, wxWindow)
  42
  43 // ----------------------------------------------------------------------------
  44 // ctor/dtor
  45 // ----------------------------------------------------------------------------
  46
  47 wxStatusBarBase::wxStatusBarBase()
  48 {
  49     m_nFields = 0;
  50
  51     InitWidths();
  52 }
  53
  54 wxStatusBarBase::~wxStatusBarBase()
  55 {
  56     FreeWidths();
  57 }
  58
  59 // ----------------------------------------------------------------------------
  60 // widths array handling
  61 // ----------------------------------------------------------------------------
  62
  63 void wxStatusBarBase::InitWidths()
  64 {
  65     m_statusWidths = NULL;
  66 }
  67
  68 void wxStatusBarBase::FreeWidths()
  69 {
  70     delete [] m_statusWidths;
  71 }
  72
  73 // ----------------------------------------------------------------------------
  74 // field widths
  75 // ----------------------------------------------------------------------------
  76
  77 void wxStatusBarBase::SetFieldsCount(int number, const int *widths)
  78 {
  79     wxCHECK_RET( number > 0, _T("invalid field number in SetFieldsCount") );
  80
  81     bool refresh = FALSE;
  82
  83     if ( number != m_nFields )
  84     {
  85         m_nFields = number;
  86
  87         ReinitWidths();
  88
  89         refresh = TRUE;
  90     }
  91     //else: keep the old m_statusWidths if we had them
  92
  93     if ( widths )
  94     {
  95         SetStatusWidths(number, widths);
  96
  97         // already done from SetStatusWidths()
  98         refresh = FALSE;
  99     }
 100
 101     if ( refresh )
 102         Refresh();
 103 }
 104
 105 void wxStatusBarBase::SetStatusWidths(int WXUNUSED_UNLESS_DEBUG(n),
 106                                       const int widths[])
 107 {
 108     wxCHECK_RET( widths, _T("NULL pointer in SetStatusWidths") );
 109
 110     wxASSERT_MSG( n == m_nFields, _T("field number mismatch") );
 111
 112     if ( !m_statusWidths )
 113         m_statusWidths = new int[m_nFields];
 114
 115     for ( int i = 0; i < m_nFields; i++ )
 116     {
 117         m_statusWidths[i] = widths[i];
 118     }
 119
 120     // update the display after the widths changed
 121     Refresh();
 122 }
 123
 124 wxArrayInt wxStatusBarBase::CalculateAbsWidths(wxCoord widthTotal) const
 125 {
 126     wxArrayInt widths;
 127
 128     if ( m_statusWidths == NULL )
 129     {
 130         // default: all fields have the same width
 131         int nWidth = widthTotal / m_nFields;
 132         for ( int i = 0; i < m_nFields; i++ )
 133         {
 134             widths.Add(nWidth);
 135         }
 136     }
 137     else // have explicit status widths
 138     {
 139         // calculate the total width of all the fixed width fields and the
 140         // total number of var field widths counting with multiplicity
 141         int nTotalWidth = 0,
 142             nVarCount = 0,
 143             i;
 144         for ( i = 0; i < m_nFields; i++ )
 145         {
 146             if ( m_statusWidths[i] >= 0 )
 147             {
 148                 nTotalWidth += m_statusWidths[i];
 149             }
 150             else
 151             {
 152                 nVarCount += -m_statusWidths[i];
 153             }
 154         }
 155
 156         // the amount of extra width we have per each var width field
 157         int nVarWidth;
 158         if ( nVarCount )
 159         {
 160             int widthExtra = widthTotal - nTotalWidth;
 161             nVarWidth = widthExtra > 0 ? widthExtra / nVarCount : 0;
 162         }
 163         else // no var width fields at all
 164         {
 165             nVarWidth = 0;
 166         }
 167
 168         // do fill the array
 169         for ( i = 0; i < m_nFields; i++ )
 170         {
 171             if ( m_statusWidths[i] >= 0 )
 172             {
 173                 widths.Add(m_statusWidths[i]);
 174             }
 175             else
 176             {
 177                 widths.Add(-m_statusWidths[i]*nVarWidth);
 178             }
 179         }
 180     }
 181
 182     return widths;
 183 }
 184
 185 #endif // wxUSE_STATUSBAR
 186