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 #ifdef __GNUG__
  15         #pragma implementation "multicell.h"
  16 #endif
  17
  18 // For compilers that support precompilation, includes "wx.h".
  19 #include "wx/wxprec.h"
  20
  21 #ifdef __BORLANDC__
  22         #pragma hdrstop
  23 #endif
  24
  25 // ----------------------------------------------------------------------------
  26 // headers
  27 // ----------------------------------------------------------------------------
  28
  29 #ifndef WX_PRECOMP
  30         #include "wx/wx.h"
  31 #endif
  32
  33 #include        "wx/gizmos/multicell.h"
  34
  35
  36
  37
  38 //---------------------------------------------------------------------------
  39
  40 IMPLEMENT_ABSTRACT_CLASS(wxMultiCellSizer, wxSizer);
  41 IMPLEMENT_ABSTRACT_CLASS(wxMultiCellItemHandle, wxObject);
  42
  43 //---------------------------------------------------------------------------
  44 // wxMultiCellItemHandle
  45 //---------------------------------------------------------------------------
  46 /*
  47  *Function Name:        wxMultiCellItemHandle :: wxMultiCellItemHandle
  48  *
  49  *Parameters:           int             row
  50  *                                      int                     column
  51  *                                      int             height
  52  *                                      int                     width
  53  *                                      wxSize          size
  54  *                                      wxResizable Style
  55  *                                      wxSize          weight
  56  *                                      int             align
  57  *
  58  *Description:  This is the constructor for the class.
  59  *
  60  */
  61
  62 void wxMultiCellItemHandle :: Initialize( int row, int column, int height, int width, wxSize size, wxResizable Style, wxSize weight, int align)
  63 {
  64         m_column = column;
  65         m_row = row;
  66         m_width = width;
  67         m_height = height;
  68
  69         m_style = Style;
  70         m_fixedSize = size;
  71         m_alignment = align;
  72         m_weight = weight;
  73 }
  74 //---------------------------------------------------------------------------
  75 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, int height, int width, wxSize size, wxResizable Style, wxSize weight, int align)
  76 {
  77         Initialize(row, column,height, width, size, Style, weight, align);
  78 }
  79 //---------------------------------------------------------------------------
  80 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, wxSize size, wxResizable style, wxSize weight, int align)
  81 {
  82         Initialize(row, column,1, 1, size, style, weight, align);
  83 }
  84 //---------------------------------------------------------------------------
  85 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, wxResizable style, wxSize weight, int align)
  86 {
  87         Initialize(row, column, 1, 1, wxSize(1, 1), style, weight, align);
  88 }
  89 //---------------------------------------------------------------------------
  90 wxMultiCellItemHandle :: wxMultiCellItemHandle( int row, int column, int align)
  91 {
  92         Initialize(row, column, 1, 1, wxSize(1,1), wxNOT_RESIZABLE, wxSize(1, 1), align);
  93 }
  94
  95 //---------------------------------------------------------------------------
  96 int wxMultiCellItemHandle::GetColumn()
  97 {
  98         return m_column;
  99 }
 100 //---------------------------------------------------------------------------
 101 int wxMultiCellItemHandle::GetRow()
 102 {
 103         return m_row;
 104 }
 105 //---------------------------------------------------------------------------
 106 int wxMultiCellItemHandle::GetWidth()
 107 {
 108         return m_width;
 109 }
 110 //---------------------------------------------------------------------------
 111 int wxMultiCellItemHandle::GetHeight()
 112 {
 113         return m_height;
 114 }
 115 //---------------------------------------------------------------------------
 116 wxResizable    wxMultiCellItemHandle :: GetStyle()
 117 {
 118         return m_style;
 119 };
 120 //---------------------------------------------------------------------------
 121 wxSize wxMultiCellItemHandle :: GetLocalSize()
 122 {
 123         return m_fixedSize;
 124 };
 125 //---------------------------------------------------------------------------
 126 int wxMultiCellItemHandle :: GetAlignment()
 127 {
 128         return m_alignment;
 129 };
 130 //---------------------------------------------------------------------------
 131 wxSize wxMultiCellItemHandle :: GetWeight()
 132 {
 133         return m_weight;
 134 };
 135
 136
 137
 138 //---------------------------------------------------------------------------
 139
 140 //---------------------------------------------------------------------------
 141 // wxMultiCellSizer
 142 //---------------------------------------------------------------------------
 143
 144 /*
 145  *Function Name:        wxMultiCellSizer::Initialize
 146  *
 147  *Parameters:           wxsize          Initial size of sizer
 148  *
 149  *Description:          This is a common function to initialize all the members of
 150  *                                      this class.  It is only called from the constructors
 151  *
 152  */
 153
 154 void wxMultiCellSizer::Initialize( wxSize size )
 155 {
 156         m_cell_count = size;
 157         m_maxHeight = (int *)malloc((1 + m_cell_count.GetHeight()) * sizeof(int));
 158         m_maxWidth = (int *)malloc( (1 + m_cell_count.GetWidth()) * sizeof(int));
 159         m_rowStretch = (int *)malloc( (1 + m_cell_count.GetHeight()) * sizeof(int));
 160         m_colStretch = (int *)malloc((1 + m_cell_count.GetWidth()) * sizeof(int));
 161
 162         m_weights = (wxSize **)malloc((1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 163         m_minSizes = (wxSize **)malloc((1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 164         for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 165         {
 166                 m_weights[x] = new wxSize(0,0);
 167                 m_minSizes[x] = new wxSize(0,0);
 168         }
 169
 170         m_maxWeights = 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth());
 171         m_defaultCellSize = wxSize(5, 5);
 172         m_win = NULL;
 173         m_pen = wxRED_PEN;
 174 }
 175 //---------------------------------------------------------------------------
 176 wxMultiCellSizer::wxMultiCellSizer( wxSize & size )
 177 {
 178         Initialize(size);
 179 }
 180 //---------------------------------------------------------------------------
 181 wxMultiCellSizer::wxMultiCellSizer( int rows, int cols)
 182 {
 183         wxSize size(cols, rows);
 184         Initialize(size);
 185 }
 186 //---------------------------------------------------------------------------
 187 wxMultiCellSizer::~wxMultiCellSizer()
 188 {
 189         WX_CLEAR_LIST(wxSizerItemList, m_children);
 190
 191         free(m_maxHeight);
 192         free(m_maxWidth);
 193         free(m_rowStretch);
 194         free(m_colStretch);
 195
 196         for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 197         {
 198                 delete m_weights[x];
 199                 delete m_minSizes[x];
 200         }
 201         free(m_weights);
 202         free(m_minSizes);
 203 }
 204 //---------------------------------------------------------------------------
 205 bool wxMultiCellSizer::EnableGridLines(wxWindow *win)
 206 {
 207         m_win = win;
 208         return TRUE;
 209 }
 210 //---------------------------------------------------------------------------
 211 bool wxMultiCellSizer::SetGridPen(wxPen *pen)
 212 {
 213         m_pen = pen;
 214         return TRUE;
 215 }
 216
 217 //---------------------------------------------------------------------------
 218 bool wxMultiCellSizer::SetDefaultCellSize(wxSize size)
 219 {
 220         m_defaultCellSize = size;
 221         return TRUE;
 222 }
 223 //---------------------------------------------------------------------------
 224 bool wxMultiCellSizer::SetColumnWidth(int column, int colSize, bool expandable)
 225 {
 226         if (expandable)
 227         {
 228                 m_minSizes[column]->SetWidth(-colSize);
 229         }
 230         else
 231         {
 232                 m_minSizes[column]->SetWidth(colSize);
 233         }
 234         return TRUE;
 235 }
 236 //---------------------------------------------------------------------------
 237 bool wxMultiCellSizer::SetRowHeight(int row, int rowSize, bool expandable)
 238 {
 239         if (expandable)
 240         {
 241                 m_minSizes[row]->SetHeight(-rowSize);
 242         }
 243         else
 244         {
 245                 m_minSizes[row]->SetHeight(rowSize);
 246         }
 247         return TRUE;
 248 }
 249 //---------------------------------------------------------------------------
 250 void wxMultiCellSizer::RecalcSizes()
 251 {
 252         if (m_children.GetCount() == 0)
 253                 return;
 254         wxSize size = GetSize();
 255         wxPoint pos = GetPosition();
 256
 257         GetMinimums();
 258
 259         // We need to take the unused space and equally give it out to all the rows/columns
 260         // which are stretchable
 261
 262         int unUsedWidth = size.GetWidth() - Sum(m_maxWidth, m_cell_count.GetWidth());
 263         int unUsedHeight = size.GetHeight() - Sum(m_maxHeight, m_cell_count.GetHeight());
 264         int totalWidthWeight = 0;
 265         int totalHeightWeight = 0;
 266         int x;
 267
 268         for (x = 0; x < wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 269         {
 270                 if (m_rowStretch[x])
 271                 {
 272                         totalHeightWeight += m_weights[x]->GetHeight();
 273                 }
 274                 if (x < m_cell_count.GetWidth() && m_colStretch[x])
 275                 {
 276                         totalWidthWeight += m_weights[x]->GetWidth();
 277                 }
 278         }
 279         for (x = 0; x < wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 280         {
 281                 if (x < m_cell_count.GetHeight() && m_rowStretch[x])
 282                 {
 283                         m_maxHeight[x] += unUsedHeight * m_weights[x]->GetHeight() / totalHeightWeight;
 284                 }
 285                 if (x < m_cell_count.GetWidth() && m_colStretch[x])
 286                 {
 287                         m_maxWidth[x] += unUsedWidth * m_weights[x]->GetWidth() / totalWidthWeight;
 288                 }
 289         }
 290         // We now have everything we need to figure each cell position and size
 291         // The arrays m_maxHeight and m_maxWidth now contain the final widths and height of
 292         // each row and column.
 293
 294         double cell_width = (double)size.GetWidth() / (double)m_cell_count.GetWidth();
 295         double cell_height = (double)size.GetHeight() / (double)m_cell_count.GetHeight();
 296         wxPoint c_point;
 297         wxSize  c_size;
 298
 299         wxSizerItemList::compatibility_iterator         current = m_children.GetFirst();
 300         while (current)
 301         {
 302                 wxSizerItem     *item = current->GetData();
 303
 304                 wxMultiCellItemHandle *rect;
 305                 if (item != NULL &&
 306                         (rect = (wxMultiCellItemHandle *)item->GetUserData()) != NULL)
 307                 {
 308                         c_point.x = pos.x + (int)(rect->GetColumn() * cell_width);
 309                         c_point.y = pos.y + (int)(rect->GetRow() * cell_height);
 310
 311                         c_point.x = pos.x + Sum(m_maxWidth, rect->GetColumn());
 312                         c_point.y = pos.y + Sum(m_maxHeight, rect->GetRow());
 313
 314
 315                         c_size = rect->GetLocalSize();
 316                         wxSize minSize( item->CalcMin() );
 317                         if (c_size.GetHeight() != wxDefaultSize.GetHeight() ||
 318                                 c_size.GetWidth() != wxDefaultSize.GetWidth())
 319                         {
 320                                 minSize.SetHeight(wxMax(minSize.GetHeight(), c_size.GetHeight()));
 321                                 minSize.SetWidth(wxMax(minSize.GetWidth(), c_size.GetWidth()));
 322                         }
 323                         if (rect->GetStyle() & wxHORIZONTAL_RESIZABLE ||
 324                                 rect->GetWidth() > 1
 325                                 || m_minSizes[rect->GetColumn()]->GetWidth() < 0)
 326                         {
 327                                 int w = 0;
 328                                 for (int x = 0; x < rect->GetWidth(); x++)
 329                                 {
 330                                         w += m_maxWidth[rect->GetColumn() + x];
 331                                 }
 332                                 c_size.SetWidth(w);
 333                         }
 334                         else
 335                         {
 336                                 c_size.SetWidth(minSize.GetWidth() );
 337                         }
 338                         if (rect->GetStyle() & wxVERTICAL_RESIZABLE ||
 339                                 rect->GetHeight() > 1 ||
 340                                 m_minSizes[rect->GetRow()]->GetHeight() < 0)
 341                         {
 342                                 int h = 0;
 343                                 for (int x = 0; x < rect->GetHeight(); x++)
 344                                 {
 345                                         h += m_maxHeight[rect->GetRow() + x];
 346                                 }
 347                                 c_size.SetHeight(h);
 348                         }
 349                         else
 350                         {
 351                                 c_size.SetHeight(minSize.GetHeight());
 352                         }
 353                         int extraHeight = (m_maxHeight[rect->GetRow()] - c_size.GetHeight());
 354                         int extraWidth = (m_maxWidth[rect->GetColumn()] - c_size.GetWidth());
 355
 356                         if (rect->GetWidth() == 1 && rect->GetAlignment() & wxALIGN_CENTER_HORIZONTAL)
 357                         {
 358                                 c_point.x += extraWidth / 2;
 359                         }
 360                         if (rect->GetWidth() == 1 && rect->GetAlignment() & wxALIGN_RIGHT)
 361                         {
 362                                 c_point.x += extraWidth;
 363                         }
 364                         if (rect->GetHeight() == 1 && rect->GetAlignment() & wxALIGN_CENTER_VERTICAL)
 365                         {
 366                                 c_point.y += extraHeight / 2;
 367                         }
 368                         if (rect->GetHeight() == 1 && rect->GetAlignment() & wxALIGN_BOTTOM)
 369                         {
 370                                 c_point.y += extraHeight;
 371                         }
 372                         item->SetDimension(c_point, c_size);
 373                 }
 374                 current = current->GetNext();
 375         }
 376 }
 377 //---------------------------------------------------------------------------
 378 wxSize wxMultiCellSizer::CalcMin()
 379 {
 380         if (m_children.GetCount() == 0)
 381                 return wxSize(10,10);
 382
 383         GetMinimums();
 384         int m_minWidth = Sum(m_maxWidth, m_cell_count.GetWidth());
 385         int m_minHeight = Sum(m_maxHeight, m_cell_count.GetHeight());
 386         return wxSize( m_minWidth, m_minHeight );
 387 }
 388 //---------------------------------------------------------------------------
 389 void wxMultiCellSizer :: GetMinimums()
 390 {
 391         // We first initial all the arrays EXCEPT for the m_minsizes array.
 392
 393         memset(m_maxHeight, 0, sizeof(int) * m_cell_count.GetHeight());
 394         memset(m_maxWidth, 0, sizeof(int) * m_cell_count.GetWidth());
 395         memset(m_rowStretch, 0, sizeof(int) * m_cell_count.GetHeight());
 396         memset(m_colStretch, 0, sizeof(int) * m_cell_count.GetWidth());
 397         for (int x = 0; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 398         {
 399                 m_weights[x]->SetHeight(0);
 400                 m_weights[x]->SetWidth(0);
 401         }
 402
 403         wxSizerItemList::compatibility_iterator         node = m_children.GetFirst();
 404         while (node)
 405         {
 406                 wxSizerItem     *item = node->GetData();
 407                 wxMultiCellItemHandle *rect;
 408                 if (item != NULL &&
 409                         (rect = (wxMultiCellItemHandle *)item->GetUserData()) != NULL)
 410                 {
 411                         int row = rect->GetRow();
 412                         int col = rect->GetColumn();
 413
 414                         // First make sure that the control knows about the max rows and columns
 415
 416                         int changed = FALSE;
 417                         if (row + 1 > m_cell_count.GetHeight())
 418                         {
 419                                 changed++;
 420                                 m_maxHeight = (int *)realloc(m_maxHeight, (1 + row) * sizeof(int));
 421                                 m_rowStretch = (int *)realloc(m_rowStretch, (1 + row) * sizeof(int));
 422                                 for (int x = m_cell_count.GetHeight(); x < row + 1; x++)
 423                                 {
 424                                         m_maxHeight[x - 1] = 0;
 425                                         m_rowStretch[x - 1] = 0;
 426                                 }
 427                                 m_cell_count.SetHeight(row + 1);
 428                         }
 429                         if (col + 1 > m_cell_count.GetWidth())
 430                         {
 431                                 changed++;
 432                                 m_maxWidth = (int *)realloc(m_maxWidth, (1 + col) * sizeof(int));
 433                                 m_colStretch = (int *)realloc(m_colStretch, ( 1 + col) * sizeof(int));
 434                                 for (int x = m_cell_count.GetWidth(); x < col + 1; x++)
 435                                 {
 436                                         m_maxWidth[x - 1] = 0;
 437                                         m_colStretch[x - 1] = 0;
 438                                 }
 439                                 m_cell_count.SetWidth(col + 1);
 440                         }
 441                         if (changed)
 442                         {
 443                                 m_weights = (wxSize **)realloc(m_weights, (1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 444                                 m_minSizes = (wxSize **)realloc(m_minSizes, (1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth())) * sizeof(wxSize *));
 445                                 for (int x = m_maxWeights; x < 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth()); x++)
 446                                 {
 447                                         m_weights[x - 1] = new wxSize(0,0);
 448                                         m_minSizes[x - 1] = new wxSize(0,0);
 449                                 }
 450                                 m_maxWeights = 1 + wxMax(m_cell_count.GetHeight(), m_cell_count.GetWidth());
 451                         }
 452
 453                         // Sum the m_weights for each row/column, but only if they are resizable
 454
 455                         wxSize minSize( item->CalcMin() );
 456                         wxSize c_size = rect->GetLocalSize();
 457                         if (c_size.GetHeight() != wxDefaultSize.GetHeight() ||
 458                                 c_size.GetWidth() != wxDefaultSize.GetWidth())
 459                         {
 460                                 minSize.SetHeight(wxMax(minSize.GetHeight(), c_size.GetHeight()));
 461                                 minSize.SetWidth(wxMax(minSize.GetWidth(), c_size.GetWidth()));
 462                         }
 463
 464                         // For each row, calculate the max height for those fields which are not
 465                         // resizable in the vertical pane
 466
 467                         if (!(rect->GetStyle() & wxVERTICAL_RESIZABLE || m_minSizes[row]->GetHeight() < 0))
 468                         {
 469                                 m_maxHeight[row] = wxMax(m_maxHeight[row], minSize.GetHeight() / rect->GetHeight());
 470                         }
 471                         else
 472                         {
 473                                 m_rowStretch[row] = 1;
 474                                 if (m_minSizes[row]->GetHeight())
 475                                 {
 476                                         m_maxHeight[row] = abs(m_minSizes[row]->GetHeight());
 477                                 }
 478                                 else
 479                                 {
 480                                         m_maxHeight[row] = wxMax(m_maxHeight[row], m_defaultCellSize.GetHeight());
 481                                 }
 482                                 m_weights[row]->SetHeight(wxMax(m_weights[row]->GetHeight(), rect->GetWeight().GetHeight()));
 483                         }
 484
 485                         // For each column, calculate the max width for those fields which are not
 486                         // resizable in the horizontal pane
 487
 488                         if (!(rect->GetStyle() & wxHORIZONTAL_RESIZABLE || m_minSizes[col]->GetWidth() < 0))
 489                         {
 490                                 if (m_minSizes[col]->GetWidth())
 491                                 {
 492                                         m_maxWidth[col] = abs(m_minSizes[col]->GetWidth());
 493                                 }
 494                                 else
 495                                 {
 496                                         m_maxWidth[col] = wxMax(m_maxWidth[col], minSize.GetWidth() / rect->GetWidth());
 497                                 }
 498                         }
 499                         else
 500                         {
 501                                 m_colStretch[col] = 1;
 502                                 m_maxWidth[col] = wxMax(m_maxWidth[col], m_defaultCellSize.GetWidth());
 503                                 m_weights[col]->SetWidth(wxMax(m_weights[col]->GetWidth(), rect->GetWeight().GetWidth()));
 504                         }
 505                         node = node->GetNext();
 506                 }
 507         }
 508 } // wxMultiCellSizer :: GetMinimums
 509 //---------------------------------------------------------------------------
 510 /*
 511  *Function Name:        wxMultiCellSizer :: Sum
 512  *
 513  *Parameters:           int *           pointer to array of ints
 514  *                                      int                     Number of cells to sum up
 515  *
 516  *Description:          This member function sums up all the elements of the array which
 517  *                                      preceed the specified cell.
 518  *
 519  *Returns:                      int                     Sum
 520  *
 521  */
 522
 523 int wxMultiCellSizer :: Sum(int *array, int x)
 524 {
 525         int sum = 0;
 526         while (x--)
 527         {
 528                 sum += array[x];
 529         }
 530         return sum;
 531 }
 532 //---------------------------------------------------------------------------
 533 /*
 534  *Function Name:        wxMultiCellSizer :: DrawGridLines
 535  *
 536  *Parameters:           wxDC            Device context
 537  *
 538  *Description:          This function draws the grid lines in the specified device context.
 539  *
 540  */
 541
 542 void wxMultiCellSizer :: DrawGridLines(wxDC& dc)
 543 {
 544         RecalcSizes();
 545         int maxW = Sum(m_maxWidth, m_cell_count.GetWidth());
 546         int maxH = Sum(m_maxHeight, m_cell_count.GetHeight());
 547         int x;
 548
 549         // Draw the columns
 550         dc.SetPen(* m_pen);
 551         for (x = 1; x < m_cell_count.GetWidth(); x++)
 552         {
 553                 int colPos = Sum(m_maxWidth, x) ;
 554                 dc.DrawLine(colPos, 0, colPos, maxH);
 555         }
 556
 557         // Draw the rows
 558         for (x = 1; x < m_cell_count.GetHeight(); x++)
 559         {
 560                 int rowPos = Sum(m_maxHeight, x);
 561                 dc.DrawLine(0, rowPos, maxW, rowPos);
 562         }
 563 }
 564 //---------------------------------------------------------------------------
 565 // Define the repainting behaviour
 566 /*
 567  *Function Name:        wxMultiCellSizer::OnPaint
 568  *
 569  *Parameters:           wxDC    Device context
 570  *
 571  *Description:          This function calls the DrawGridLines() member if a window
 572  *                                      has been previously specified.  This functions MUST be called
 573  *                                      from an OnPaint member belonging to the window which the sizer
 574  *                                      is attached to.
 575  *
 576  */
 577
 578 void wxMultiCellSizer::OnPaint(wxDC& dc )
 579 {
 580         if (m_win)
 581         {
 582                 DrawGridLines(dc);
 583         }
 584 }
 585
 586
 587 //---------------------------------------------------------------------------
 588 //---------------------------------------------------------------------------
 589
 590
 591
 592
 593 #define CELL_LOC(row, col)      ((row) * m_maxCols + col)
 594
 595 //---------------------------------------------------------------------------
 596 // wxCell
 597 //---------------------------------------------------------------------------
 598 /*
 599  *Function Name:        wxCell : wxLayoutConstraints
 600  *
 601  *Description:          This class is used by wxMultiCellCanvas for internal storage
 602  *
 603  */
 604
 605 class wxCell : public wxLayoutConstraints
 606 {
 607 public:
 608         wxCell(wxWindow *win)
 609         {
 610                 m_window = win;
 611         };
 612
 613         wxWindow    *m_window;
 614 };
 615
 616
 617
 618 //---------------------------------------------------------------------------
 619 // wxMultiCellCanvas
 620 //---------------------------------------------------------------------------
 621 wxMultiCellCanvas :: wxMultiCellCanvas(wxWindow *par, int numRows, int numCols)
 622    : wxFlexGridSizer(numRows, numCols, 0, 0)
 623 {
 624         m_cells = (wxCell **)calloc(numRows * numCols, sizeof(wxCell *));
 625
 626         m_parent = par;
 627         m_maxRows = numRows;
 628         m_maxCols = numCols;
 629         m_minCellSize = wxSize(5, 5);
 630 }
 631 //---------------------------------------------------------------------------
 632 void wxMultiCellCanvas :: Add(wxWindow *win, unsigned int row, unsigned int col)
 633 {
 634   // thanks to unsigned data row and col are always >= 0
 635         wxASSERT_MSG( /* row >= 0 && */ row < m_maxRows,
 636                  wxString::Format(_T("Row %d out of bounds (0..%d)"), row, m_maxRows) );
 637         wxASSERT_MSG( /* col >= 0 && */ col < m_maxCols,
 638                  wxString::Format(_T("Column %d out of bounds (0..%d)"), col, m_maxCols) );
 639
 640         wxASSERT_MSG(m_cells[CELL_LOC(row, col)] == NULL, wxT("Cell already occupied"));
 641
 642         wxCell *newCell = new wxCell(win);
 643         m_cells[CELL_LOC(row,col)] = newCell;
 644 }
 645 //---------------------------------------------------------------------------
 646 void wxMultiCellCanvas :: CalculateConstraints()
 647 {
 648         unsigned int    row, col;
 649         for (row = 0; row < m_maxRows; row++)
 650         {
 651                 for (col = 0; col < m_maxCols; col++)
 652                 {
 653                         if (!m_cells[CELL_LOC(row, col)])
 654                         {
 655                                 // Create an empty static text field as a placeholder
 656                                 m_cells[CELL_LOC(row, col)] = new wxCell(new wxStaticText(m_parent, -1, wxT("")));
 657                         }
 658                         wxFlexGridSizer::Add(m_cells[CELL_LOC(row, col)]->m_window);
 659                 }
 660         }
 661 }
 662
 663 /*** End of File ***/
 664