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 licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  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 #include "wx/listimpl.cpp"
  38 WX_DEFINE_LIST(wxListString);
  39
  40 // ============================================================================
  41 // wxStatusBarBase implementation
  42 // ============================================================================
  43
  44 IMPLEMENT_DYNAMIC_CLASS(wxStatusBar, wxWindow)
  45
  46 // ----------------------------------------------------------------------------
  47 // ctor/dtor
  48 // ----------------------------------------------------------------------------
  49
  50 wxStatusBarBase::wxStatusBarBase()
  51 {
  52     m_nFields = 0;
  53
  54     InitWidths();
  55     InitStacks();
  56 }
  57
  58 wxStatusBarBase::~wxStatusBarBase()
  59 {
  60     FreeWidths();
  61     FreeStacks();
  62 }
  63
  64 // ----------------------------------------------------------------------------
  65 // widths array handling
  66 // ----------------------------------------------------------------------------
  67
  68 void wxStatusBarBase::InitWidths()
  69 {
  70     m_statusWidths = NULL;
  71 }
  72
  73 void wxStatusBarBase::FreeWidths()
  74 {
  75     delete [] m_statusWidths;
  76 }
  77
  78 // ----------------------------------------------------------------------------
  79 // field widths
  80 // ----------------------------------------------------------------------------
  81
  82 void wxStatusBarBase::SetFieldsCount(int number, const int *widths)
  83 {
  84     wxCHECK_RET( number > 0, _T("invalid field number in SetFieldsCount") );
  85
  86     bool refresh = FALSE;
  87
  88     if ( number != m_nFields )
  89     {
  90         // copy stacks if present
  91         if(m_statusTextStacks)
  92         {
  93             wxListString **newStacks = new wxListString*[number];
  94             size_t i, j, max = wxMin(number, m_nFields);
  95
  96             // copy old stacks
  97             for(i = 0; i < max; ++i)
  98                 newStacks[i] = m_statusTextStacks[i];
  99             // free old stacks in excess
 100             for(j = i; j < (size_t)m_nFields; ++j)
 101             {
 102                 if(m_statusTextStacks[j])
 103                 {
 104                     m_statusTextStacks[j]->Clear();
 105                     delete m_statusTextStacks[j];
 106                 }
 107             }
 108             // initialize new stacks to NULL
 109             for(j = i; j < (size_t)number; ++j)
 110                 newStacks[j] = 0;
 111
 112             m_statusTextStacks = newStacks;
 113         }
 114
 115         m_nFields = number;
 116
 117         ReinitWidths();
 118
 119         refresh = TRUE;
 120     }
 121     //else: keep the old m_statusWidths if we had them
 122
 123     if ( widths )
 124     {
 125         SetStatusWidths(number, widths);
 126
 127         // already done from SetStatusWidths()
 128         refresh = FALSE;
 129     }
 130
 131     if ( refresh )
 132         Refresh();
 133 }
 134
 135 void wxStatusBarBase::SetStatusWidths(int WXUNUSED_UNLESS_DEBUG(n),
 136                                       const int widths[])
 137 {
 138     wxCHECK_RET( widths, _T("NULL pointer in SetStatusWidths") );
 139
 140     wxASSERT_MSG( n == m_nFields, _T("field number mismatch") );
 141
 142     if ( !m_statusWidths )
 143         m_statusWidths = new int[m_nFields];
 144
 145     for ( int i = 0; i < m_nFields; i++ )
 146     {
 147         m_statusWidths[i] = widths[i];
 148     }
 149
 150     // update the display after the widths changed
 151     Refresh();
 152 }
 153
 154 wxArrayInt wxStatusBarBase::CalculateAbsWidths(wxCoord widthTotal) const
 155 {
 156     wxArrayInt widths;
 157
 158     if ( m_statusWidths == NULL )
 159     {
 160         if ( m_nFields )
 161         {
 162             // default: all fields have the same width
 163             int nWidth = widthTotal / m_nFields;
 164             for ( int i = 0; i < m_nFields; i++ )
 165             {
 166                 widths.Add(nWidth);
 167             }
 168         }
 169         //else: we're empty anyhow
 170     }
 171     else // have explicit status widths
 172     {
 173         // calculate the total width of all the fixed width fields and the
 174         // total number of var field widths counting with multiplicity
 175         int nTotalWidth = 0,
 176             nVarCount = 0,
 177             i;
 178         for ( i = 0; i < m_nFields; i++ )
 179         {
 180             if ( m_statusWidths[i] >= 0 )
 181             {
 182                 nTotalWidth += m_statusWidths[i];
 183             }
 184             else
 185             {
 186                 nVarCount += -m_statusWidths[i];
 187             }
 188         }
 189
 190         // the amount of extra width we have per each var width field
 191         int nVarWidth;
 192         if ( nVarCount )
 193         {
 194             int widthExtra = widthTotal - nTotalWidth;
 195             nVarWidth = widthExtra > 0 ? widthExtra / nVarCount : 0;
 196         }
 197         else // no var width fields at all
 198         {
 199             nVarWidth = 0;
 200         }
 201
 202         // do fill the array
 203         for ( i = 0; i < m_nFields; i++ )
 204         {
 205             if ( m_statusWidths[i] >= 0 )
 206             {
 207                 widths.Add(m_statusWidths[i]);
 208             }
 209             else
 210             {
 211                 widths.Add(-m_statusWidths[i]*nVarWidth);
 212             }
 213         }
 214     }
 215
 216     return widths;
 217 }
 218
 219 // ----------------------------------------------------------------------------
 220 // text stacks handling
 221 // ----------------------------------------------------------------------------
 222
 223 void wxStatusBarBase::InitStacks()
 224 {
 225     m_statusTextStacks = NULL;
 226 }
 227
 228 void wxStatusBarBase::FreeStacks()
 229 {
 230     if(!m_statusTextStacks) return;
 231     size_t i;
 232
 233     for(i = 0; i < (size_t)m_nFields; ++i)
 234     {
 235         if(m_statusTextStacks[i])
 236         {
 237             wxListString& t = *m_statusTextStacks[i];
 238             WX_CLEAR_LIST(wxListString, t);
 239             delete m_statusTextStacks[i];
 240         }
 241     }
 242
 243     delete[] m_statusTextStacks;
 244 }
 245
 246 // ----------------------------------------------------------------------------
 247 // text stacks
 248 // ----------------------------------------------------------------------------
 249
 250 void wxStatusBarBase::PushStatusText(const wxString& text, int number)
 251 {
 252     wxListString* st = GetOrCreateStatusStack(number);
 253     st->Insert(new wxString(GetStatusText(number)));
 254     SetStatusText(text, number);
 255 }
 256
 257 void wxStatusBarBase::PopStatusText(int number)
 258 {
 259     wxListString *st = GetStatusStack(number);
 260     wxCHECK_RET( st, _T("Unbalanced PushStatusText/PopStatusText") );
 261     wxListString::compatibility_iterator top = st->GetFirst();
 262
 263     SetStatusText(*top->GetData(), number);
 264     delete top->GetData();
 265     st->Erase(top);
 266     if(st->GetCount() == 0)
 267     {
 268         delete st;
 269         m_statusTextStacks[number] = 0;
 270     }
 271 }
 272
 273 wxListString *wxStatusBarBase::GetStatusStack(int i) const
 274 {
 275     if(!m_statusTextStacks)
 276         return 0;
 277     return m_statusTextStacks[i];
 278 }
 279
 280 wxListString *wxStatusBarBase::GetOrCreateStatusStack(int i)
 281 {
 282     if(!m_statusTextStacks)
 283     {
 284         m_statusTextStacks = new wxListString*[m_nFields];
 285
 286         size_t j;
 287         for(j = 0; j < (size_t)m_nFields; ++j) m_statusTextStacks[j] = 0;
 288     }
 289
 290     if(!m_statusTextStacks[i])
 291     {
 292         m_statusTextStacks[i] = new wxListString();
 293     }
 294
 295     return m_statusTextStacks[i];
 296 }
 297
 298 #endif // wxUSE_STATUSBAR
 299