contrib/src/gizmos/multicell.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        multicell.cpp
   3 // Purpose:     provide two new classes for layout, wxMultiCellSizer and wxMultiCellCanvas
   4 // Author:      Jonathan Bayer
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Jonathan Bayer
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // This was inspired by the gbsizer class written by Alex Andruschak
  13
  14 // For compilers that support precompilation, includes "wx.h".
  15 #include "wx/wxprec.h"
  16
  17 #ifdef __BORLANDC__
  18     #pragma hdrstop
  19 #endif
  20
  21 // ----------------------------------------------------------------------------
  22 // headers
  23 // ----------------------------------------------------------------------------
  24
  25 #ifndef WX_PRECOMP
  26     #include "wx/wx.h"
  27 #endif
  28
  29 #include "wx/gizmos/multicell.h"
  30
  31
  32
  33
  34 //---------------------------------------------------------------------------
  35
  36 IMPLEMENT_ABSTRACT_CLASS(wxMultiCellSizer, wxSizer);
  37 IMPLEMENT_ABSTRACT_CLASS(wxMultiCellItemHandle, wxObject);
  38
  39 //---------------------------------------------------------------------------
  40 // wxMultiCellItemHandle
  41 //---------------------------------------------------------------------------
  42 /*
  43  *Function Name: wxMultiCellItemHandle :: wxMultiCellItemHandle
  44  *
  45  *Parameters:    int         row
  46  *               int         column
  47  *               int         height
  48  *               int         width
  49  *               wxSize      size
  50  *               wxResizable Style
  51  *               wxSize      weight
  52  *               int         align
  53  *
  54  *Description:   This is the constructor for the class.
  55  *
  56  */
  57
  58 void wxMultiCellItemHandle :: Initialize( int row, int column, int height, int width, wxSize size, wxResizable Style, wxSize weight, int align)
  59 {
  60     m_column = column;
  61     m_row = row;
  62     m_width = width;
  63     m_height = height;
  64
  65     m_style = Style;
  66     m_fixedSize = size;
  67     m_alignment = align;
  68     m_weight = weight;
  69 }
  70 //---------------------------------------------------------------------------
  71 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, int height, int width, wxSize size, wxResizable Style, wxSize weight, int align)
  72 {
  73     Initialize(row, column,height, width, size, Style, weight, align);
  74 }
  75 //---------------------------------------------------------------------------
  76 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, wxSize size, wxResizable style, wxSize weight, int align)
  77 {
  78     Initialize(row, column,1, 1, size, style, weight, align);
  79 }
  80 //---------------------------------------------------------------------------
  81 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, wxResizable style, wxSize weight, int align)
  82 {
  83     Initialize(row, column, 1, 1, wxSize(1, 1), style, weight, align);
  84 }
  85 //---------------------------------------------------------------------------
  86 int wxMultiCellItemHandle::GetColumn()
  87 {
  88     return m_column;
  89 }
  90 //---------------------------------------------------------------------------
  91 int wxMultiCellItemHandle::GetRow()
  92 {
  93     return m_row;
  94 }
  95 //---------------------------------------------------------------------------
  96 int wxMultiCellItemHandle::GetWidth()
  97 {
  98     return m_width;
  99 }
 100 //---------------------------------------------------------------------------
 101 int wxMultiCellItemHandle::GetHeight()
 102 {
 103     return m_height;
 104 }
 105 //---------------------------------------------------------------------------
 106 wxResizable    wxMultiCellItemHandle :: GetStyle()
 107 {
 108     return m_style;
 109 };
 110 //---------------------------------------------------------------------------
 111 wxSize wxMultiCellItemHandle :: GetLocalSize()
 112 {
 113     return m_fixedSize;
 114 };
 115 //---------------------------------------------------------------------------
 116 int wxMultiCellItemHandle :: GetAlignment()
 117 {
 118     return m_alignment;
 119 };
 120 //---------------------------------------------------------------------------
 121 wxSize wxMultiCellItemHandle :: GetWeight()
 122 {
 123     return m_weight;
 124 };
 125
 126
 127
 128 //---------------------------------------------------------------------------
 129
 130 //---------------------------------------------------------------------------
 131 // wxMultiCellSizer
 132 //---------------------------------------------------------------------------
 133
 134 /*
 135  *Function Name: wxMultiCellSizer::Initialize
 136  *
 137  *Parameters:    wxsize Initial size of sizer
 138  *
 139  *Description:   This is a common function to initialize all the members of
 140  *               this class.  It is only called from the constructors
 141  *
 142  */
 143
 144 void wxMultiCellSizer::Initialize( wxSize size )
 145 {
 146     m_cell_count = size;
 147     m_maxHeight = (int *)malloc((1 + m_cell_count.GetHeight()) * sizeof(int));
 148     m_maxWidth = (int *)malloc( (1 + m_cell_count.GetWidth()) * sizeof(int));
 149     m_rowStretch = (int *)malloc( (1 + m_cell_count.GetHeight()) * sizeof(int));
 150     m_colStretch = (int *)malloc((1 + m_cell_count.GetWidth()) * sizeof(int));
 151
 152     m_weights = (wxSize **)malloc((1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 153     m_minSizes = (wxSize **)malloc((1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 154     for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 155     {
 156         m_weights[x] = new wxSize(0,0);
 157         m_minSizes[x] = new wxSize(0,0);
 158     }
 159
 160     m_maxWeights = 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth());
 161     m_defaultCellSize = wxSize(5, 5);
 162     m_win = NULL;
 163     m_pen = wxRED_PEN;
 164 }
 165 //---------------------------------------------------------------------------
 166 wxMultiCellSizer::wxMultiCellSizer( wxSize & size )
 167 {
 168     Initialize(size);
 169 }
 170 //---------------------------------------------------------------------------
 171 wxMultiCellSizer::wxMultiCellSizer( int rows, int cols)
 172 {
 173     wxSize size(cols, rows);
 174     Initialize(size);
 175 }
 176 //---------------------------------------------------------------------------
 177 wxMultiCellSizer::~wxMultiCellSizer()
 178 {
 179     WX_CLEAR_LIST(wxSizerItemList, m_children);
 180
 181     free(m_maxHeight);
 182     free(m_maxWidth);
 183     free(m_rowStretch);
 184     free(m_colStretch);
 185
 186     for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 187     {
 188         delete m_weights[x];
 189         delete m_minSizes[x];
 190     }
 191     free(m_weights);
 192     free(m_minSizes);
 193 }
 194 //---------------------------------------------------------------------------
 195 bool wxMultiCellSizer::EnableGridLines(wxWindow *win)
 196 {
 197     m_win = win;
 198     return true;
 199 }
 200 //---------------------------------------------------------------------------
 201 bool wxMultiCellSizer::SetGridPen(const wxPen *pen)
 202 {
 203     m_pen = pen;
 204     return true;
 205 }
 206
 207 //---------------------------------------------------------------------------
 208 bool wxMultiCellSizer::SetDefaultCellSize(wxSize size)
 209 {
 210     m_defaultCellSize = size;
 211     return true;
 212 }
 213 //---------------------------------------------------------------------------
 214 bool wxMultiCellSizer::SetColumnWidth(int column, int colSize, bool expandable)
 215 {
 216     if (expandable)
 217     {
 218         m_minSizes[column]->SetWidth(-colSize);
 219     }
 220     else
 221     {
 222         m_minSizes[column]->SetWidth(colSize);
 223     }
 224     return true;
 225 }
 226 //---------------------------------------------------------------------------
 227 bool wxMultiCellSizer::SetRowHeight(int row, int rowSize, bool expandable)
 228 {
 229     if (expandable)
 230     {
 231         m_minSizes[row]->SetHeight(-rowSize);
 232     }
 233     else
 234     {
 235         m_minSizes[row]->SetHeight(rowSize);
 236     }
 237     return true;
 238 }
 239 //---------------------------------------------------------------------------
 240 void wxMultiCellSizer::RecalcSizes()
 241 {
 242     if (m_children.GetCount() == 0)
 243         return;
 244     wxSize size = GetSize();
 245     wxPoint pos = GetPosition();
 246
 247     GetMinimums();
 248
 249     // We need to take the unused space and equally give it out to all the rows/columns
 250     // which are stretchable
 251
 252     int unUsedWidth = size.GetWidth() - Sum(m_maxWidth, m_cell_count.GetWidth());
 253     int unUsedHeight = size.GetHeight() - Sum(m_maxHeight, m_cell_count.GetHeight());
 254     int totalWidthWeight = 0;
 255     int totalHeightWeight = 0;
 256     int x;
 257
 258     for (x = 0; x < wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 259     {
 260         if (m_rowStretch[x])
 261         {
 262             totalHeightWeight += m_weights[x]->GetHeight();
 263         }
 264         if (x < m_cell_count.GetWidth() && m_colStretch[x])
 265         {
 266             totalWidthWeight += m_weights[x]->GetWidth();
 267         }
 268     }
 269     for (x = 0; x < wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 270     {
 271         if (x < m_cell_count.GetHeight() && m_rowStretch[x])
 272         {
 273             m_maxHeight[x] += unUsedHeight * m_weights[x]->GetHeight() / totalHeightWeight;
 274         }
 275         if (x < m_cell_count.GetWidth() && m_colStretch[x])
 276         {
 277             m_maxWidth[x] += unUsedWidth * m_weights[x]->GetWidth() / totalWidthWeight;
 278         }
 279     }
 280     // We now have everything we need to figure each cell position and size
 281     // The arrays m_maxHeight and m_maxWidth now contain the final widths and height of
 282     // each row and column.
 283
 284     double cell_width = (double)size.GetWidth() / (double)m_cell_count.GetWidth();
 285     double cell_height = (double)size.GetHeight() / (double)m_cell_count.GetHeight();
 286     wxPoint c_point;
 287     wxSize  c_size;
 288
 289     wxSizerItemList::compatibility_iterator current = m_children.GetFirst();
 290     while (current)
 291     {
 292         wxSizerItem *item = current->GetData();
 293
 294         wxMultiCellItemHandle *rect;
 295         if (item != NULL &&
 296             (rect = (wxMultiCellItemHandle *)item->GetUserData()) != NULL)
 297         {
 298             c_point.x = pos.x + (int)(rect->GetColumn() * cell_width);
 299             c_point.y = pos.y + (int)(rect->GetRow() * cell_height);
 300
 301             c_point.x = pos.x + Sum(m_maxWidth, rect->GetColumn());
 302             c_point.y = pos.y + Sum(m_maxHeight, rect->GetRow());
 303
 304
 305             c_size = rect->GetLocalSize();
 306             wxSize minSize( item->CalcMin() );
 307             if (c_size.GetHeight() != wxDefaultCoord ||
 308                 c_size.GetWidth() != wxDefaultCoord)
 309             {
 310                 minSize.SetHeight(wxMax(minSize.GetHeight(), c_size.GetHeight()));
 311                 minSize.SetWidth(wxMax(minSize.GetWidth(), c_size.GetWidth()));
 312             }
 313             if (rect->GetStyle() & wxHORIZONTAL_RESIZABLE ||
 314                 rect->GetWidth() > 1
 315                 || m_minSizes[rect->GetColumn()]->GetWidth() < 0)
 316             {
 317                 int w = 0;
 318                 for (int x = 0; x < rect->GetWidth(); x++)
 319                 {
 320                     w += m_maxWidth[rect->GetColumn() + x];
 321                 }
 322                 c_size.SetWidth(w);
 323             }
 324             else
 325             {
 326                 c_size.SetWidth(minSize.GetWidth() );
 327             }
 328             if (rect->GetStyle() & wxVERTICAL_RESIZABLE ||
 329                 rect->GetHeight() > 1 ||
 330                 m_minSizes[rect->GetRow()]->GetHeight() < 0)
 331             {
 332                 int h = 0;
 333                 for (int x = 0; x < rect->GetHeight(); x++)
 334                 {
 335                     h += m_maxHeight[rect->GetRow() + x];
 336                 }
 337                 c_size.SetHeight(h);
 338             }
 339             else
 340             {
 341                 c_size.SetHeight(minSize.GetHeight());
 342             }
 343             int extraHeight = (m_maxHeight[rect->GetRow()] - c_size.GetHeight());
 344             int extraWidth = (m_maxWidth[rect->GetColumn()] - c_size.GetWidth());
 345
 346             if (rect->GetWidth() == 1 && rect->GetAlignment() & wxALIGN_CENTER_HORIZONTAL)
 347             {
 348                 c_point.x += extraWidth / 2;
 349             }
 350             if (rect->GetWidth() == 1 && rect->GetAlignment() & wxALIGN_RIGHT)
 351             {
 352                 c_point.x += extraWidth;
 353             }
 354             if (rect->GetHeight() == 1 && rect->GetAlignment() & wxALIGN_CENTER_VERTICAL)
 355             {
 356                 c_point.y += extraHeight / 2;
 357             }
 358             if (rect->GetHeight() == 1 && rect->GetAlignment() & wxALIGN_BOTTOM)
 359             {
 360                 c_point.y += extraHeight;
 361             }
 362             item->SetDimension(c_point, c_size);
 363         }
 364         current = current->GetNext();
 365     }
 366 }
 367 //---------------------------------------------------------------------------
 368 wxSize wxMultiCellSizer::CalcMin()
 369 {
 370     if (m_children.GetCount() == 0)
 371         return wxSize(10,10);
 372
 373     GetMinimums();
 374     int m_minWidth = Sum(m_maxWidth, m_cell_count.GetWidth());
 375     int m_minHeight = Sum(m_maxHeight, m_cell_count.GetHeight());
 376     return wxSize( m_minWidth, m_minHeight );
 377 }
 378 //---------------------------------------------------------------------------
 379 void wxMultiCellSizer :: GetMinimums()
 380 {
 381     // We first initial all the arrays EXCEPT for the m_minsizes array.
 382
 383     memset(m_maxHeight, 0, sizeof(int) * m_cell_count.GetHeight());
 384     memset(m_maxWidth, 0, sizeof(int) * m_cell_count.GetWidth());
 385     memset(m_rowStretch, 0, sizeof(int) * m_cell_count.GetHeight());
 386     memset(m_colStretch, 0, sizeof(int) * m_cell_count.GetWidth());
 387     for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 388     {
 389         m_weights[x]->SetHeight(0);
 390         m_weights[x]->SetWidth(0);
 391     }
 392
 393     wxSizerItemList::compatibility_iterator     node = m_children.GetFirst();
 394     while (node)
 395     {
 396         wxSizerItem     *item = node->GetData();
 397         wxMultiCellItemHandle *rect;
 398         if (item != NULL &&
 399             (rect = (wxMultiCellItemHandle *)item->GetUserData()) != NULL)
 400         {
 401             int row = rect->GetRow();
 402             int col = rect->GetColumn();
 403
 404             // First make sure that the control knows about the max rows and columns
 405
 406             int changed = false;
 407             if (row + 1 > m_cell_count.GetHeight())
 408             {
 409                 changed++;
 410                 m_maxHeight = (int *)realloc(m_maxHeight, (1 + row) * sizeof(int));
 411                 m_rowStretch = (int *)realloc(m_rowStretch, (1 + row) * sizeof(int));
 412                 for (int x = m_cell_count.GetHeight(); x < row + 1; x++)
 413                 {
 414                     m_maxHeight[x - 1] = 0;
 415                     m_rowStretch[x - 1] = 0;
 416                 }
 417                 m_cell_count.SetHeight(row + 1);
 418             }
 419             if (col + 1 > m_cell_count.GetWidth())
 420             {
 421                 changed++;
 422                 m_maxWidth = (int *)realloc(m_maxWidth, (1 + col) * sizeof(int));
 423                 m_colStretch = (int *)realloc(m_colStretch, ( 1 + col) * sizeof(int));
 424                 for (int x = m_cell_count.GetWidth(); x < col + 1; x++)
 425                 {
 426                     m_maxWidth[x - 1] = 0;
 427                     m_colStretch[x - 1] = 0;
 428                 }
 429                 m_cell_count.SetWidth(col + 1);
 430             }
 431             if (changed)
 432             {
 433                 m_weights = (wxSize **)realloc(m_weights, (1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 434                 m_minSizes = (wxSize **)realloc(m_minSizes, (1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 435                 for (int x = m_maxWeights; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 436                 {
 437                     m_weights[x - 1] = new wxSize(0,0);
 438                     m_minSizes[x - 1] = new wxSize(0,0);
 439                 }
 440                 m_maxWeights = 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth());
 441             }
 442
 443             // Sum the m_weights for each row/column, but only if they are resizable
 444
 445             wxSize minSize( item->CalcMin() );
 446             wxSize c_size = rect->GetLocalSize();
 447             if (c_size.GetHeight() != wxDefaultCoord ||
 448                 c_size.GetWidth() != wxDefaultCoord)
 449             {
 450                 minSize.SetHeight(wxMax(minSize.GetHeight(), c_size.GetHeight()));
 451                 minSize.SetWidth(wxMax(minSize.GetWidth(), c_size.GetWidth()));
 452             }
 453
 454             // For each row, calculate the max height for those fields which are not
 455             // resizable in the vertical pane
 456
 457             if (!(rect->GetStyle() & wxVERTICAL_RESIZABLE || m_minSizes[row]->GetHeight() < 0))
 458             {
 459                 m_maxHeight[row] = wxMax(m_maxHeight[row], minSize.GetHeight() / rect->GetHeight());
 460             }
 461             else
 462             {
 463                 m_rowStretch[row] = 1;
 464                 if (m_minSizes[row]->GetHeight())
 465                 {
 466                     m_maxHeight[row] = abs(m_minSizes[row]->GetHeight());
 467                 }
 468                 else
 469                 {
 470                     m_maxHeight[row] = wxMax(m_maxHeight[row], m_defaultCellSize.GetHeight());
 471                 }
 472                 m_weights[row]->SetHeight(wxMax(m_weights[row]->GetHeight(), rect->GetWeight().GetHeight()));
 473             }
 474
 475             // For each column, calculate the max width for those fields which are not
 476             // resizable in the horizontal pane
 477
 478             if (!(rect->GetStyle() & wxHORIZONTAL_RESIZABLE || m_minSizes[col]->GetWidth() < 0))
 479             {
 480                 if (m_minSizes[col]->GetWidth())
 481                 {
 482                     m_maxWidth[col] = abs(m_minSizes[col]->GetWidth());
 483                 }
 484                 else
 485                 {
 486                     m_maxWidth[col] = wxMax(m_maxWidth[col], minSize.GetWidth() / rect->GetWidth());
 487                 }
 488             }
 489             else
 490             {
 491                 m_colStretch[col] = 1;
 492                 m_maxWidth[col] = wxMax(m_maxWidth[col], m_defaultCellSize.GetWidth());
 493                 m_weights[col]->SetWidth(wxMax(m_weights[col]->GetWidth(), rect->GetWeight().GetWidth()));
 494             }
 495             node = node->GetNext();
 496         }
 497     }
 498 } // wxMultiCellSizer :: GetMinimums
 499 //---------------------------------------------------------------------------
 500 /*
 501  *Function Name: wxMultiCellSizer :: Sum
 502  *
 503  *Parameters:    int* pointer to array of ints
 504  *               int  Number of cells to sum up
 505  *
 506  *Description:   This member function sums up all the elements of the array which
 507  *               preceed the specified cell.
 508  *
 509  *Returns:       int Sum
 510  *
 511  */
 512
 513 int wxMultiCellSizer :: Sum(int *array, int x)
 514 {
 515     int sum = 0;
 516     while (x--)
 517     {
 518         sum += array[x];
 519     }
 520     return sum;
 521 }
 522 //---------------------------------------------------------------------------
 523 /*
 524  *Function Name: wxMultiCellSizer :: DrawGridLines
 525  *
 526  *Parameters:    wxDC Device context
 527  *
 528  *Description:   This function draws the grid lines in the specified device context.
 529  *
 530  */
 531
 532 void wxMultiCellSizer :: DrawGridLines(wxDC& dc)
 533 {
 534     RecalcSizes();
 535     int maxW = Sum(m_maxWidth, m_cell_count.GetWidth());
 536     int maxH = Sum(m_maxHeight, m_cell_count.GetHeight());
 537     int x;
 538
 539     // Draw the columns
 540     dc.SetPen(* m_pen);
 541     for (x = 1; x < m_cell_count.GetWidth(); x++)
 542     {
 543         int colPos = Sum(m_maxWidth, x) ;
 544         dc.DrawLine(colPos, 0, colPos, maxH);
 545     }
 546
 547     // Draw the rows
 548     for (x = 1; x < m_cell_count.GetHeight(); x++)
 549     {
 550         int rowPos = Sum(m_maxHeight, x);
 551         dc.DrawLine(0, rowPos, maxW, rowPos);
 552     }
 553 }
 554 //---------------------------------------------------------------------------
 555 // Define the repainting behaviour
 556 /*
 557  *Function Name: wxMultiCellSizer::OnPaint
 558  *
 559  *Parameters:    wxDC Device context
 560  *
 561  *Description:   This function calls the DrawGridLines() member if a window
 562  *               has been previously specified.  This functions MUST be called
 563  *               from an OnPaint member belonging to the window which the sizer
 564  *               is attached to.
 565  *
 566  */
 567
 568 void wxMultiCellSizer::OnPaint(wxDC& dc )
 569 {
 570     if (m_win)
 571     {
 572         DrawGridLines(dc);
 573     }
 574 }
 575
 576
 577 //---------------------------------------------------------------------------
 578 //---------------------------------------------------------------------------
 579
 580
 581
 582
 583 #define CELL_LOC(row, col) ((row) * m_maxCols + col)
 584
 585 //---------------------------------------------------------------------------
 586 // wxCell
 587 //---------------------------------------------------------------------------
 588 /*
 589  *Function Name: wxCell : wxLayoutConstraints
 590  *
 591  *Description:   This class is used by wxMultiCellCanvas for internal storage
 592  *
 593  */
 594
 595 class wxCell : public wxLayoutConstraints
 596 {
 597 public:
 598     wxCell(wxWindow *win)
 599     {
 600         m_window = win;
 601     };
 602
 603     wxWindow    *m_window;
 604 };
 605
 606
 607
 608 //---------------------------------------------------------------------------
 609 // wxMultiCellCanvas
 610 //---------------------------------------------------------------------------
 611 wxMultiCellCanvas :: wxMultiCellCanvas(wxWindow *par, int numRows, int numCols)
 612    : wxFlexGridSizer(numRows, numCols, 0, 0)
 613 {
 614     m_cells = (wxCell **)calloc(numRows * numCols, sizeof(wxCell *));
 615
 616     m_parent = par;
 617     m_maxRows = numRows;
 618     m_maxCols = numCols;
 619     m_minCellSize = wxSize(5, 5);
 620 }
 621 //---------------------------------------------------------------------------
 622 void wxMultiCellCanvas :: Add(wxWindow *win, unsigned int row, unsigned int col)
 623 {
 624   // thanks to unsigned data row and col are always >= 0
 625     wxASSERT_MSG( /* row >= 0 && */ row < m_maxRows,
 626                  wxString::Format(_T("Row %d out of bounds (0..%d)"), row, m_maxRows) );
 627     wxASSERT_MSG( /* col >= 0 && */ col < m_maxCols,
 628                  wxString::Format(_T("Column %d out of bounds (0..%d)"), col, m_maxCols) );
 629
 630     wxASSERT_MSG(m_cells[CELL_LOC(row, col)] == NULL, wxT("Cell already occupied"));
 631
 632     wxCell *newCell = new wxCell(win);
 633     m_cells[CELL_LOC(row,col)] = newCell;
 634 }
 635 //---------------------------------------------------------------------------
 636 void wxMultiCellCanvas :: CalculateConstraints()
 637 {
 638     unsigned int    row, col;
 639     for (row = 0; row < m_maxRows; row++)
 640     {
 641         for (col = 0; col < m_maxCols; col++)
 642         {
 643             if (!m_cells[CELL_LOC(row, col)])
 644             {
 645                 // Create an empty static text field as a placeholder
 646                 m_cells[CELL_LOC(row, col)] = new wxCell(new wxStaticText(m_parent, wxID_ANY, wxEmptyString));
 647             }
 648             wxFlexGridSizer::Add(m_cells[CELL_LOC(row, col)]->m_window);
 649         }
 650     }
 651 }
 652
 653 /*** End of File ***/