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/frame.h"
  33     #include "wx/statusbr.h"
  34 #endif //WX_PRECOMP
  35
  36 #if wxUSE_STATUSBAR
  37
  38 #include "wx/listimpl.cpp"
  39 WX_DEFINE_LIST(wxListString);
  40
  41 // ============================================================================
  42 // wxStatusBarBase implementation
  43 // ============================================================================
  44
  45 IMPLEMENT_DYNAMIC_CLASS(wxStatusBar, wxWindow)
  46
  47 // ----------------------------------------------------------------------------
  48 // ctor/dtor
  49 // ----------------------------------------------------------------------------
  50
  51 wxStatusBarBase::wxStatusBarBase()
  52 {
  53     m_nFields = 0;
  54
  55     InitWidths();
  56     InitStacks();
  57     InitStyles();
  58 }
  59
  60 wxStatusBarBase::~wxStatusBarBase()
  61 {
  62     FreeWidths();
  63     FreeStacks();
  64     FreeStyles();
  65
  66     // notify the frame that it doesn't have a status bar any longer to avoid
  67     // dangling pointers
  68     wxFrameBase *frame = wxDynamicCast(GetParent(), wxFrameBase);
  69     if ( frame && frame->GetStatusBar() == this )
  70     {
  71         frame->SetStatusBar(NULL);
  72     }
  73 }
  74
  75 // ----------------------------------------------------------------------------
  76 // widths array handling
  77 // ----------------------------------------------------------------------------
  78
  79 void wxStatusBarBase::InitWidths()
  80 {
  81     m_statusWidths = NULL;
  82 }
  83
  84 void wxStatusBarBase::FreeWidths()
  85 {
  86     delete [] m_statusWidths;
  87 }
  88
  89 // ----------------------------------------------------------------------------
  90 // styles array handling
  91 // ----------------------------------------------------------------------------
  92
  93 void wxStatusBarBase::InitStyles()
  94 {
  95     m_statusStyles = NULL;
  96 }
  97
  98 void wxStatusBarBase::FreeStyles()
  99 {
 100     delete [] m_statusStyles;
 101 }
 102
 103 // ----------------------------------------------------------------------------
 104 // field widths
 105 // ----------------------------------------------------------------------------
 106
 107 void wxStatusBarBase::SetFieldsCount(int number, const int *widths)
 108 {
 109     wxCHECK_RET( number > 0, _T("invalid field number in SetFieldsCount") );
 110
 111     bool refresh = false;
 112
 113     if ( number != m_nFields )
 114     {
 115         // copy stacks if present
 116         if(m_statusTextStacks)
 117         {
 118             wxListString **newStacks = new wxListString*[number];
 119             size_t i, j, max = wxMin(number, m_nFields);
 120
 121             // copy old stacks
 122             for(i = 0; i < max; ++i)
 123                 newStacks[i] = m_statusTextStacks[i];
 124             // free old stacks in excess
 125             for(j = i; j < (size_t)m_nFields; ++j)
 126             {
 127                 if(m_statusTextStacks[j])
 128                 {
 129                     m_statusTextStacks[j]->Clear();
 130                     delete m_statusTextStacks[j];
 131                 }
 132             }
 133             // initialize new stacks to NULL
 134             for(j = i; j < (size_t)number; ++j)
 135                 newStacks[j] = 0;
 136
 137             m_statusTextStacks = newStacks;
 138         }
 139
 140         // Resize styles array
 141         if (m_statusStyles)
 142         {
 143             int *oldStyles = m_statusStyles;
 144             m_statusStyles = new int[number];
 145             int i, max = wxMin(number, m_nFields);
 146
 147             // copy old styles
 148             for (i = 0; i < max; ++i)
 149                 m_statusStyles[i] = oldStyles[i];
 150
 151             // initialize new styles to wxSB_NORMAL
 152             for (i = max; i < number; ++i)
 153                 m_statusStyles[i] = wxSB_NORMAL;
 154
 155             // free old styles
 156             delete [] oldStyles;
 157         }
 158
 159
 160         m_nFields = number;
 161
 162         ReinitWidths();
 163
 164         refresh = true;
 165     }
 166     //else: keep the old m_statusWidths if we had them
 167
 168     if ( widths )
 169     {
 170         SetStatusWidths(number, widths);
 171
 172         // already done from SetStatusWidths()
 173         refresh = false;
 174     }
 175
 176     if ( refresh )
 177         Refresh();
 178 }
 179
 180 void wxStatusBarBase::SetStatusWidths(int WXUNUSED_UNLESS_DEBUG(n),
 181                                       const int widths[])
 182 {
 183     wxCHECK_RET( widths, _T("NULL pointer in SetStatusWidths") );
 184
 185     wxASSERT_MSG( n == m_nFields, _T("field number mismatch") );
 186
 187     if ( !m_statusWidths )
 188         m_statusWidths = new int[m_nFields];
 189
 190     for ( int i = 0; i < m_nFields; i++ )
 191     {
 192         m_statusWidths[i] = widths[i];
 193     }
 194
 195     // update the display after the widths changed
 196     Refresh();
 197 }
 198
 199 void wxStatusBarBase::SetStatusStyles(int WXUNUSED_UNLESS_DEBUG(n),
 200                                       const int styles[])
 201 {
 202     wxCHECK_RET( styles, _T("NULL pointer in SetStatusStyles") );
 203
 204     wxASSERT_MSG( n == m_nFields, _T("field number mismatch") );
 205
 206     if ( !m_statusStyles )
 207         m_statusStyles = new int[m_nFields];
 208
 209     for ( int i = 0; i < m_nFields; i++ )
 210     {
 211         m_statusStyles[i] = styles[i];
 212     }
 213
 214     // update the display after the widths changed
 215     Refresh();
 216 }
 217
 218 wxArrayInt wxStatusBarBase::CalculateAbsWidths(wxCoord widthTotal) const
 219 {
 220     wxArrayInt widths;
 221
 222     if ( m_statusWidths == NULL )
 223     {
 224         if ( m_nFields )
 225         {
 226             // default: all fields have the same width
 227             int nWidth = widthTotal / m_nFields;
 228             for ( int i = 0; i < m_nFields; i++ )
 229             {
 230                 widths.Add(nWidth);
 231             }
 232         }
 233         //else: we're empty anyhow
 234     }
 235     else // have explicit status widths
 236     {
 237         // calculate the total width of all the fixed width fields and the
 238         // total number of var field widths counting with multiplicity
 239         int nTotalWidth = 0,
 240             nVarCount = 0,
 241             i;
 242         for ( i = 0; i < m_nFields; i++ )
 243         {
 244             if ( m_statusWidths[i] >= 0 )
 245             {
 246                 nTotalWidth += m_statusWidths[i];
 247             }
 248             else
 249             {
 250                 nVarCount += -m_statusWidths[i];
 251             }
 252         }
 253
 254         // the amount of extra width we have per each var width field
 255         int widthExtra = widthTotal - nTotalWidth;
 256
 257         // do fill the array
 258         for ( i = 0; i < m_nFields; i++ )
 259         {
 260             if ( m_statusWidths[i] >= 0 )
 261             {
 262                 widths.Add(m_statusWidths[i]);
 263             }
 264             else
 265             {
 266                 int nVarWidth = widthExtra > 0 ? (widthExtra * -m_statusWidths[i]) / nVarCount : 0;
 267                 nVarCount += m_statusWidths[i];
 268                 widthExtra -= nVarWidth;
 269                 widths.Add(nVarWidth);
 270             }
 271         }
 272     }
 273
 274     return widths;
 275 }
 276
 277 // ----------------------------------------------------------------------------
 278 // text stacks handling
 279 // ----------------------------------------------------------------------------
 280
 281 void wxStatusBarBase::InitStacks()
 282 {
 283     m_statusTextStacks = NULL;
 284 }
 285
 286 void wxStatusBarBase::FreeStacks()
 287 {
 288     if ( !m_statusTextStacks )
 289         return;
 290
 291     for ( size_t i = 0; i < (size_t)m_nFields; ++i )
 292     {
 293         if ( m_statusTextStacks[i] )
 294         {
 295             wxListString& t = *m_statusTextStacks[i];
 296             WX_CLEAR_LIST(wxListString, t);
 297             delete m_statusTextStacks[i];
 298         }
 299     }
 300
 301     delete[] m_statusTextStacks;
 302 }
 303
 304 // ----------------------------------------------------------------------------
 305 // text stacks
 306 // ----------------------------------------------------------------------------
 307
 308 void wxStatusBarBase::PushStatusText(const wxString& text, int number)
 309 {
 310     wxListString* st = GetOrCreateStatusStack(number);
 311     // This long-winded way around avoids an internal compiler error
 312     // in VC++ 6 with RTTI enabled
 313     wxString tmp1(GetStatusText(number));
 314     wxString* tmp = new wxString(tmp1);
 315     st->Insert(tmp);
 316     SetStatusText(text, number);
 317 }
 318
 319 void wxStatusBarBase::PopStatusText(int number)
 320 {
 321     wxListString *st = GetStatusStack(number);
 322     wxCHECK_RET( st, _T("Unbalanced PushStatusText/PopStatusText") );
 323     wxListString::compatibility_iterator top = st->GetFirst();
 324
 325     SetStatusText(*top->GetData(), number);
 326     delete top->GetData();
 327     st->Erase(top);
 328     if(st->GetCount() == 0)
 329     {
 330         delete st;
 331         m_statusTextStacks[number] = 0;
 332     }
 333 }
 334
 335 wxListString *wxStatusBarBase::GetStatusStack(int i) const
 336 {
 337     if(!m_statusTextStacks)
 338         return 0;
 339     return m_statusTextStacks[i];
 340 }
 341
 342 wxListString *wxStatusBarBase::GetOrCreateStatusStack(int i)
 343 {
 344     if(!m_statusTextStacks)
 345     {
 346         m_statusTextStacks = new wxListString*[m_nFields];
 347
 348         size_t j;
 349         for(j = 0; j < (size_t)m_nFields; ++j) m_statusTextStacks[j] = 0;
 350     }
 351
 352     if(!m_statusTextStacks[i])
 353     {
 354         m_statusTextStacks[i] = new wxListString();
 355     }
 356
 357     return m_statusTextStacks[i];
 358 }
 359
 360 #endif // wxUSE_STATUSBAR
 361