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 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/frame.h"
  29     #include "wx/statusbr.h"
  30 #endif //WX_PRECOMP
  31
  32 #if wxUSE_STATUSBAR
  33
  34 #include "wx/listimpl.cpp"
  35 WX_DEFINE_LIST(wxListString);
  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     InitStacks();
  53     InitStyles();
  54 }
  55
  56 wxStatusBarBase::~wxStatusBarBase()
  57 {
  58     FreeWidths();
  59     FreeStacks();
  60     FreeStyles();
  61
  62     // notify the frame that it doesn't have a status bar any longer to avoid
  63     // dangling pointers
  64     wxFrame *frame = wxDynamicCast(GetParent(), wxFrame);
  65     if ( frame && frame->GetStatusBar() == this )
  66     {
  67         frame->SetStatusBar(NULL);
  68     }
  69 }
  70
  71 // ----------------------------------------------------------------------------
  72 // widths array handling
  73 // ----------------------------------------------------------------------------
  74
  75 void wxStatusBarBase::InitWidths()
  76 {
  77     m_statusWidths = NULL;
  78 }
  79
  80 void wxStatusBarBase::FreeWidths()
  81 {
  82     delete [] m_statusWidths;
  83 }
  84
  85 // ----------------------------------------------------------------------------
  86 // styles array handling
  87 // ----------------------------------------------------------------------------
  88
  89 void wxStatusBarBase::InitStyles()
  90 {
  91     m_statusStyles = NULL;
  92 }
  93
  94 void wxStatusBarBase::FreeStyles()
  95 {
  96     delete [] m_statusStyles;
  97 }
  98
  99 // ----------------------------------------------------------------------------
 100 // field widths
 101 // ----------------------------------------------------------------------------
 102
 103 void wxStatusBarBase::SetFieldsCount(int number, const int *widths)
 104 {
 105     wxCHECK_RET( number > 0, _T("invalid field number in SetFieldsCount") );
 106
 107     bool refresh = false;
 108
 109     if ( number != m_nFields )
 110     {
 111         // copy stacks if present
 112         if(m_statusTextStacks)
 113         {
 114             wxListString **newStacks = new wxListString*[number];
 115             size_t i, j, max = wxMin(number, m_nFields);
 116
 117             // copy old stacks
 118             for(i = 0; i < max; ++i)
 119                 newStacks[i] = m_statusTextStacks[i];
 120             // free old stacks in excess
 121             for(j = i; j < (size_t)m_nFields; ++j)
 122             {
 123                 if(m_statusTextStacks[j])
 124                 {
 125                     m_statusTextStacks[j]->Clear();
 126                     delete m_statusTextStacks[j];
 127                 }
 128             }
 129             // initialize new stacks to NULL
 130             for(j = i; j < (size_t)number; ++j)
 131                 newStacks[j] = 0;
 132
 133             m_statusTextStacks = newStacks;
 134         }
 135
 136         // Resize styles array
 137         if (m_statusStyles)
 138         {
 139             int *oldStyles = m_statusStyles;
 140             m_statusStyles = new int[number];
 141             int i, max = wxMin(number, m_nFields);
 142
 143             // copy old styles
 144             for (i = 0; i < max; ++i)
 145                 m_statusStyles[i] = oldStyles[i];
 146
 147             // initialize new styles to wxSB_NORMAL
 148             for (i = max; i < number; ++i)
 149                 m_statusStyles[i] = wxSB_NORMAL;
 150
 151             // free old styles
 152             delete [] oldStyles;
 153         }
 154
 155
 156         m_nFields = number;
 157
 158         ReinitWidths();
 159
 160         refresh = true;
 161     }
 162     //else: keep the old m_statusWidths if we had them
 163
 164     if ( widths )
 165     {
 166         SetStatusWidths(number, widths);
 167
 168         // already done from SetStatusWidths()
 169         refresh = false;
 170     }
 171
 172     if ( refresh )
 173         Refresh();
 174 }
 175
 176 void wxStatusBarBase::SetStatusWidths(int WXUNUSED_UNLESS_DEBUG(n),
 177                                       const int widths[])
 178 {
 179     wxCHECK_RET( widths, _T("NULL pointer in SetStatusWidths") );
 180
 181     wxASSERT_MSG( n == m_nFields, _T("field number mismatch") );
 182
 183     if ( !m_statusWidths )
 184         m_statusWidths = new int[m_nFields];
 185
 186     for ( int i = 0; i < m_nFields; i++ )
 187     {
 188         m_statusWidths[i] = widths[i];
 189     }
 190
 191     // update the display after the widths changed
 192     Refresh();
 193 }
 194
 195 void wxStatusBarBase::SetStatusStyles(int WXUNUSED_UNLESS_DEBUG(n),
 196                                       const int styles[])
 197 {
 198     wxCHECK_RET( styles, _T("NULL pointer in SetStatusStyles") );
 199
 200     wxASSERT_MSG( n == m_nFields, _T("field number mismatch") );
 201
 202     if ( !m_statusStyles )
 203         m_statusStyles = new int[m_nFields];
 204
 205     for ( int i = 0; i < m_nFields; i++ )
 206     {
 207         m_statusStyles[i] = styles[i];
 208     }
 209
 210     // update the display after the widths changed
 211     Refresh();
 212 }
 213
 214 wxArrayInt wxStatusBarBase::CalculateAbsWidths(wxCoord widthTotal) const
 215 {
 216     wxArrayInt widths;
 217
 218     if ( m_statusWidths == NULL )
 219     {
 220         if ( m_nFields )
 221         {
 222             // default: all fields have the same width
 223             int nWidth = widthTotal / m_nFields;
 224             for ( int i = 0; i < m_nFields; i++ )
 225             {
 226                 widths.Add(nWidth);
 227             }
 228         }
 229         //else: we're empty anyhow
 230     }
 231     else // have explicit status widths
 232     {
 233         // calculate the total width of all the fixed width fields and the
 234         // total number of var field widths counting with multiplicity
 235         int nTotalWidth = 0,
 236             nVarCount = 0,
 237             i;
 238         for ( i = 0; i < m_nFields; i++ )
 239         {
 240             if ( m_statusWidths[i] >= 0 )
 241             {
 242                 nTotalWidth += m_statusWidths[i];
 243             }
 244             else
 245             {
 246                 nVarCount += -m_statusWidths[i];
 247             }
 248         }
 249
 250         // the amount of extra width we have per each var width field
 251         int widthExtra = widthTotal - nTotalWidth;
 252
 253         // do fill the array
 254         for ( i = 0; i < m_nFields; i++ )
 255         {
 256             if ( m_statusWidths[i] >= 0 )
 257             {
 258                 widths.Add(m_statusWidths[i]);
 259             }
 260             else
 261             {
 262                 int nVarWidth = widthExtra > 0 ? (widthExtra * -m_statusWidths[i]) / nVarCount : 0;
 263                 nVarCount += m_statusWidths[i];
 264                 widthExtra -= nVarWidth;
 265                 widths.Add(nVarWidth);
 266             }
 267         }
 268     }
 269
 270     return widths;
 271 }
 272
 273 // ----------------------------------------------------------------------------
 274 // text stacks handling
 275 // ----------------------------------------------------------------------------
 276
 277 void wxStatusBarBase::InitStacks()
 278 {
 279     m_statusTextStacks = NULL;
 280 }
 281
 282 void wxStatusBarBase::FreeStacks()
 283 {
 284     if ( !m_statusTextStacks )
 285         return;
 286
 287     for ( size_t i = 0; i < (size_t)m_nFields; ++i )
 288     {
 289         if ( m_statusTextStacks[i] )
 290         {
 291             wxListString& t = *m_statusTextStacks[i];
 292             WX_CLEAR_LIST(wxListString, t);
 293             delete m_statusTextStacks[i];
 294         }
 295     }
 296
 297     delete[] m_statusTextStacks;
 298 }
 299
 300 // ----------------------------------------------------------------------------
 301 // text stacks
 302 // ----------------------------------------------------------------------------
 303
 304 void wxStatusBarBase::PushStatusText(const wxString& text, int number)
 305 {
 306     wxListString* st = GetOrCreateStatusStack(number);
 307     // This long-winded way around avoids an internal compiler error
 308     // in VC++ 6 with RTTI enabled
 309     wxString tmp1(GetStatusText(number));
 310     wxString* tmp = new wxString(tmp1);
 311     st->Insert(tmp);
 312     SetStatusText(text, number);
 313 }
 314
 315 void wxStatusBarBase::PopStatusText(int number)
 316 {
 317     wxListString *st = GetStatusStack(number);
 318     wxCHECK_RET( st, _T("Unbalanced PushStatusText/PopStatusText") );
 319     wxListString::compatibility_iterator top = st->GetFirst();
 320
 321     SetStatusText(*top->GetData(), number);
 322     delete top->GetData();
 323     st->Erase(top);
 324     if(st->GetCount() == 0)
 325     {
 326         delete st;
 327         m_statusTextStacks[number] = 0;
 328     }
 329 }
 330
 331 wxListString *wxStatusBarBase::GetStatusStack(int i) const
 332 {
 333     if(!m_statusTextStacks)
 334         return 0;
 335     return m_statusTextStacks[i];
 336 }
 337
 338 wxListString *wxStatusBarBase::GetOrCreateStatusStack(int i)
 339 {
 340     if(!m_statusTextStacks)
 341     {
 342         m_statusTextStacks = new wxListString*[m_nFields];
 343
 344         size_t j;
 345         for(j = 0; j < (size_t)m_nFields; ++j) m_statusTextStacks[j] = 0;
 346     }
 347
 348     if(!m_statusTextStacks[i])
 349     {
 350         m_statusTextStacks[i] = new wxListString();
 351     }
 352
 353     return m_statusTextStacks[i];
 354 }
 355
 356 #endif // wxUSE_STATUSBAR
 357