src/common/sizer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sizer.cpp
   3 // Purpose:     provide new wxSizer class for layout
   4 // Author:      Robert Roebling and Robin Dunn
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robin Dunn, Dirk Holtwick and Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "sizer.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #include "wx/sizer.h"
  24 #include "wx/utils.h"
  25 #include "wx/statbox.h"
  26 #include "wx/notebook.h"
  27
  28 //---------------------------------------------------------------------------
  29
  30 IMPLEMENT_ABSTRACT_CLASS(wxSizerItem, wxObject)
  31 IMPLEMENT_ABSTRACT_CLASS(wxSizer, wxObject)
  32 IMPLEMENT_ABSTRACT_CLASS(wxGridSizer, wxSizer)
  33 IMPLEMENT_ABSTRACT_CLASS(wxFlexGridSizer, wxGridSizer)
  34 IMPLEMENT_ABSTRACT_CLASS(wxBoxSizer, wxSizer)
  35 #if wxUSE_STATBOX
  36 IMPLEMENT_ABSTRACT_CLASS(wxStaticBoxSizer, wxBoxSizer)
  37 #endif
  38 #if wxUSE_NOTEBOOK
  39 IMPLEMENT_ABSTRACT_CLASS(wxNotebookSizer, wxSizer)
  40 #endif
  41
  42 //---------------------------------------------------------------------------
  43 // wxSizerItem
  44 //---------------------------------------------------------------------------
  45
  46 wxSizerItem::wxSizerItem( int width, int height, int option, int flag, int border, wxObject* userData )
  47 {
  48     m_window = (wxWindow *) NULL;
  49     m_sizer = (wxSizer *) NULL;
  50     m_option = option;
  51     m_border = border;
  52     m_flag = flag;
  53     m_userData = userData;
  54
  55     // minimal size is the initial size
  56     m_minSize.x = width;
  57     m_minSize.y = height;
  58
  59     SetRatio(width, height);
  60
  61     // size is set directly
  62     m_size = m_minSize;
  63 }
  64
  65 wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border, wxObject* userData )
  66 {
  67     m_window = window;
  68     m_sizer = (wxSizer *) NULL;
  69     m_option = option;
  70     m_border = border;
  71     m_flag = flag;
  72     m_userData = userData;
  73
  74     // minimal size is the initial size
  75     m_minSize = window->GetSize();
  76
  77     // aspect ratio calculated from initial size
  78     SetRatio(m_minSize);
  79
  80     // size is calculated later
  81     // m_size = ...
  82 }
  83
  84 wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
  85 {
  86     m_window = (wxWindow *) NULL;
  87     m_sizer = sizer;
  88     m_option = option;
  89     m_border = border;
  90     m_flag = flag;
  91     m_userData = userData;
  92
  93     // minimal size is calculated later
  94     // m_minSize = ...
  95     m_ratio = 0;
  96
  97     // size is calculated later
  98     // m_size = ...
  99 }
 100
 101 wxSizerItem::~wxSizerItem()
 102 {
 103     if (m_userData)
 104         delete m_userData;
 105     if (m_sizer)
 106         delete m_sizer;
 107 }
 108
 109
 110 wxSize wxSizerItem::GetSize()
 111 {
 112     wxSize ret;
 113     if (IsSizer())
 114         ret = m_sizer->GetSize();
 115     else
 116     if (IsWindow())
 117         ret = m_window->GetSize();
 118     else ret = m_size;
 119
 120     if (m_flag & wxWEST)
 121         ret.x += m_border;
 122     if (m_flag & wxEAST)
 123         ret.x += m_border;
 124     if (m_flag & wxNORTH)
 125         ret.y += m_border;
 126     if (m_flag & wxSOUTH)
 127         ret.y += m_border;
 128
 129     return ret;
 130 }
 131
 132 wxSize wxSizerItem::CalcMin()
 133 {
 134     wxSize ret;
 135     if (IsSizer())
 136     {
 137         ret = m_sizer->GetMinSize();
 138
 139         // if we have to preserve aspect ratio _AND_ this is
 140         // the first-time calculation, consider ret to be initial size
 141         if ((m_flag & wxSHAPED) && !m_ratio)
 142             SetRatio(ret);
 143     }
 144     else
 145     {
 146         if ( IsWindow() && (m_flag & wxADJUST_MINSIZE) )
 147         {
 148             // check if the best (minimal, in fact) window size hadn't changed
 149             // by chance: this may happen for, e.g. static text if its label
 150             // changed
 151             wxSize size = m_window->GetBestSize();
 152             if ( size.x > m_minSize.x )
 153                 m_minSize.x = size.x;
 154             if ( size.y > m_minSize.y )
 155                 m_minSize.y = size.y;
 156         }
 157
 158         ret = m_minSize;
 159     }
 160
 161     if (m_flag & wxWEST)
 162         ret.x += m_border;
 163     if (m_flag & wxEAST)
 164         ret.x += m_border;
 165     if (m_flag & wxNORTH)
 166         ret.y += m_border;
 167     if (m_flag & wxSOUTH)
 168         ret.y += m_border;
 169
 170     return ret;
 171 }
 172
 173 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 174 {
 175     if (m_flag & wxSHAPED)
 176     {
 177         // adjust aspect ratio
 178         int rwidth = (int) (size.y * m_ratio);
 179         if (rwidth > size.x)
 180         {
 181             // fit horizontally
 182             int rheight = (int) (size.x / m_ratio);
 183             // add vertical space
 184             if (m_flag & wxALIGN_CENTER_VERTICAL)
 185                 pos.y += (size.y - rheight) / 2;
 186             else if (m_flag & wxALIGN_BOTTOM)
 187                 pos.y += (size.y - rheight);
 188             // use reduced dimensions
 189             size.y =rheight;
 190         }
 191         else if (rwidth < size.x)
 192         {
 193             // add horizontal space
 194             if (m_flag & wxALIGN_CENTER_HORIZONTAL)
 195                 pos.x += (size.x - rwidth) / 2;
 196             else if (m_flag & wxALIGN_RIGHT)
 197                 pos.x += (size.x - rwidth);
 198             size.x = rwidth;
 199         }
 200     }
 201
 202     // This is what GetPosition() returns. Since we calculate
 203     // borders afterwards, GetPosition() will be the left/top
 204     // corner of the surrounding border.
 205     m_pos = pos;
 206
 207     if (m_flag & wxWEST)
 208     {
 209         pos.x += m_border;
 210         size.x -= m_border;
 211     }
 212     if (m_flag & wxEAST)
 213     {
 214         size.x -= m_border;
 215     }
 216     if (m_flag & wxNORTH)
 217     {
 218         pos.y += m_border;
 219         size.y -= m_border;
 220     }
 221     if (m_flag & wxSOUTH)
 222     {
 223         size.y -= m_border;
 224     }
 225
 226     if (IsSizer())
 227         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 228
 229     if (IsWindow())
 230         m_window->SetSize( pos.x, pos.y, size.x, size.y, wxSIZE_ALLOW_MINUS_ONE );
 231
 232     m_size = size;
 233 }
 234
 235 void wxSizerItem::DeleteWindows()
 236 {
 237     if (m_window)
 238          m_window->Destroy();
 239
 240     if (m_sizer)
 241         m_sizer->DeleteWindows();
 242 }
 243
 244 bool wxSizerItem::IsWindow()
 245 {
 246     return (m_window != NULL);
 247 }
 248
 249 bool wxSizerItem::IsSizer()
 250 {
 251     return (m_sizer != NULL);
 252 }
 253
 254 bool wxSizerItem::IsSpacer()
 255 {
 256     return (m_window == NULL) && (m_sizer == NULL);
 257 }
 258
 259 //---------------------------------------------------------------------------
 260 // wxSizer
 261 //---------------------------------------------------------------------------
 262
 263 wxSizer::wxSizer()
 264 {
 265     m_children.DeleteContents( TRUE );
 266     m_minSize.x = 0;
 267     m_minSize.y = 0;
 268 }
 269
 270 wxSizer::~wxSizer()
 271 {
 272     Clear();
 273 }
 274
 275 void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
 276 {
 277     m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
 278     window->SetContainingSizer(this);
 279 }
 280
 281 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 282 {
 283     m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
 284 }
 285
 286 void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
 287 {
 288     m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
 289 }
 290
 291 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
 292 {
 293     m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
 294     window->SetContainingSizer(this);
 295 }
 296
 297 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 298 {
 299     m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
 300 }
 301
 302 void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
 303 {
 304     m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
 305 }
 306
 307 void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
 308 {
 309     m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
 310     window->SetContainingSizer(this);
 311 }
 312
 313 void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 314 {
 315     m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
 316 }
 317
 318 void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
 319 {
 320     m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
 321 }
 322
 323 bool wxSizer::Remove( wxWindow *window )
 324 {
 325     wxASSERT( window );
 326
 327     wxNode *node = m_children.First();
 328     while (node)
 329     {
 330         wxSizerItem *item = (wxSizerItem*)node->Data();
 331         if (item->GetWindow() == window)
 332         {
 333             item->GetWindow()->SetContainingSizer(NULL);
 334             m_children.DeleteNode( node );
 335             return TRUE;
 336         }
 337         node = node->Next();
 338     }
 339
 340     return FALSE;
 341 }
 342
 343 bool wxSizer::Remove( wxSizer *sizer )
 344 {
 345     wxASSERT( sizer );
 346
 347     wxNode *node = m_children.First();
 348     while (node)
 349     {
 350         wxSizerItem *item = (wxSizerItem*)node->Data();
 351         if (item->GetSizer() == sizer)
 352         {
 353             m_children.DeleteNode( node );
 354             return TRUE;
 355         }
 356         node = node->Next();
 357     }
 358
 359     return FALSE;
 360 }
 361
 362 bool wxSizer::Remove( int pos )
 363 {
 364     wxNode *node = m_children.Nth( pos );
 365     if (!node) return FALSE;
 366
 367     m_children.DeleteNode( node );
 368
 369     return TRUE;
 370 }
 371
 372 void wxSizer::Clear( bool delete_windows )
 373 {
 374     // First clear the ContainingSizer pointers
 375     wxNode *node = m_children.First();
 376     while (node)
 377     {
 378         wxSizerItem *item = (wxSizerItem*)node->Data();
 379         if (item->IsWindow())
 380             item->GetWindow()->SetContainingSizer(NULL);
 381         node = node->Next();
 382     }
 383
 384     // Destroy the windows if needed
 385     if (delete_windows)
 386         DeleteWindows();
 387
 388     // Now empty the list
 389     m_children.Clear();
 390 }
 391
 392 void wxSizer::DeleteWindows()
 393 {
 394     wxNode *node = m_children.First();
 395     while (node)
 396     {
 397         wxSizerItem *item = (wxSizerItem*)node->Data();
 398         item->DeleteWindows();
 399         node = node->Next();
 400     }
 401 }
 402
 403 void wxSizer::Fit( wxWindow *window )
 404 {
 405     wxSize size;
 406     if (window->IsTopLevel())
 407         size = FitSize( window );
 408     else
 409         size = GetMinWindowSize( window );
 410
 411     window->SetSize( size );
 412 }
 413
 414 void wxSizer::Layout()
 415 {
 416     CalcMin();
 417     RecalcSizes();
 418 }
 419
 420 void wxSizer::SetSizeHints( wxWindow *window )
 421 {
 422     // Preserve the window's max size hints, but set the
 423     // lower bound according to the sizer calculations.
 424
 425     wxSize size = FitSize( window );
 426     window->SetSizeHints( size.x,
 427                           size.y,
 428                           window->GetMaxWidth(),
 429                           window->GetMaxHeight() );
 430 }
 431
 432 wxSize wxSizer::GetMaxWindowSize( wxWindow *window )
 433 {
 434     return window->GetMaxSize();
 435 }
 436
 437 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 438 {
 439     wxSize minSize( GetMinSize() );
 440     wxSize size( window->GetSize() );
 441     wxSize client_size( window->GetClientSize() );
 442     return wxSize( minSize.x+size.x-client_size.x,
 443                    minSize.y+size.y-client_size.y );
 444 }
 445
 446 // Return a window size that will fit within the screens dimensions
 447 wxSize wxSizer::FitSize( wxWindow *window )
 448 {
 449     wxSize size     = GetMinWindowSize( window );
 450     wxSize sizeMax  = GetMaxWindowSize( window );
 451
 452     // Limit the size if sizeMax != wxDefaultSize
 453
 454     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 455         size.x = sizeMax.x;
 456     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 457         size.y = sizeMax.y;
 458
 459     return size;
 460 }
 461
 462 void wxSizer::SetDimension( int x, int y, int width, int height )
 463 {
 464     m_position.x = x;
 465     m_position.y = y;
 466     m_size.x = width;
 467     m_size.y = height;
 468     CalcMin();
 469     RecalcSizes();
 470 }
 471
 472 wxSize wxSizer::GetMinSize()
 473 {
 474     wxSize ret( CalcMin() );
 475     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 476     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 477     return ret;
 478 }
 479
 480 void wxSizer::DoSetMinSize( int width, int height )
 481 {
 482     m_minSize.x = width;
 483     m_minSize.y = height;
 484 }
 485
 486 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 487 {
 488     wxASSERT( window );
 489
 490     wxNode *node = m_children.First();
 491     while (node)
 492     {
 493         wxSizerItem *item = (wxSizerItem*)node->Data();
 494         if (item->GetWindow() == window)
 495         {
 496             item->SetInitSize( width, height );
 497             return TRUE;
 498         }
 499         node = node->Next();
 500     }
 501
 502     node = m_children.First();
 503     while (node)
 504     {
 505         wxSizerItem *item = (wxSizerItem*)node->Data();
 506         if (item->GetSizer())
 507         {
 508             /* It's a sizer, so lets search recursively. */
 509             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 510             {
 511                 /* A child sizer found the requested windw, exit. */
 512                 return TRUE;
 513             }
 514         }
 515         node = node->Next();
 516     }
 517
 518     return FALSE;
 519 }
 520
 521 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 522 {
 523     wxASSERT( sizer );
 524
 525     wxNode *node = m_children.First();
 526     while (node)
 527     {
 528         wxSizerItem *item = (wxSizerItem*)node->Data();
 529         if (item->GetSizer() == sizer)
 530         {
 531             item->GetSizer()->DoSetMinSize( width, height );
 532             return TRUE;
 533         }
 534         node = node->Next();
 535     }
 536
 537     node = m_children.First();
 538     while (node)
 539     {
 540         wxSizerItem *item = (wxSizerItem*)node->Data();
 541         if (item->GetSizer())
 542         {
 543             /* It's a sizer, so lets search recursively. */
 544             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 545             {
 546                 /* A child sizer found the requested windw, exit. */
 547                 return TRUE;
 548             }
 549         }
 550         node = node->Next();
 551     }
 552
 553     return FALSE;
 554 }
 555
 556 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 557 {
 558     wxNode *node = m_children.Nth( pos );
 559     if (!node) return FALSE;
 560
 561     wxSizerItem *item = (wxSizerItem*) node->Data();
 562     if (item->GetSizer())
 563     {
 564         /* Sizers contains the minimal size in them, if not calculated ... */
 565         item->GetSizer()->DoSetMinSize( width, height );
 566     }
 567     else
 568     {
 569         /* ... whereas the minimal size of spacers and windows in stored
 570            in the item */
 571         item->SetInitSize( width, height );
 572     }
 573
 574     return TRUE;
 575 }
 576
 577 //---------------------------------------------------------------------------
 578 // wxGridSizer
 579 //---------------------------------------------------------------------------
 580
 581 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 582 {
 583     m_rows = rows;
 584     m_cols = cols;
 585     m_vgap = vgap;
 586     m_hgap = hgap;
 587 }
 588
 589 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 590 {
 591     m_rows = 0;
 592     m_cols = cols;
 593     m_vgap = vgap;
 594     m_hgap = hgap;
 595 }
 596
 597 void wxGridSizer::RecalcSizes()
 598 {
 599     if (m_children.GetCount() == 0)
 600         return;
 601
 602     int nitems = m_children.GetCount();
 603     int nrows = m_rows;
 604     int ncols = m_cols;
 605
 606     if (ncols > 0)
 607         nrows = (nitems + ncols-1) / ncols;
 608     else
 609         ncols = (nitems + nrows-1) / nrows;
 610
 611     wxSize sz( GetSize() );
 612     wxPoint pt( GetPosition() );
 613
 614     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 615     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 616
 617     int x = pt.x;
 618     for (int c = 0; c < ncols; c++)
 619     {
 620         int y = pt.y;
 621         for (int r = 0; r < nrows; r++)
 622         {
 623             int i = r * ncols + c;
 624             if (i < nitems)
 625             {
 626                 wxNode *node = m_children.Nth( i );
 627                 wxASSERT( node );
 628
 629                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 630             }
 631             y = y + h + m_vgap;
 632         }
 633         x = x + w + m_hgap;
 634     }
 635 }
 636
 637 wxSize wxGridSizer::CalcMin()
 638 {
 639     if (m_children.GetCount() == 0)
 640         return wxSize(10,10);
 641
 642     int nitems = m_children.GetCount();
 643     int nrows = m_rows;
 644     int ncols = m_cols;
 645
 646     if (ncols > 0)
 647         nrows = (nitems + ncols-1) / ncols;
 648     else
 649         ncols = (nitems + nrows-1) / nrows;
 650
 651     /* Find the max width and height for any component */
 652     int w = 0;
 653     int h = 0;
 654
 655     wxNode *node = m_children.First();
 656     while (node)
 657     {
 658         wxSizerItem *item = (wxSizerItem*)node->Data();
 659         wxSize sz( item->CalcMin() );
 660         w = wxMax( w, sz.x );
 661         h = wxMax( h, sz.y );
 662
 663         node = node->Next();
 664     }
 665
 666     return wxSize(ncols * w + (ncols-1) * m_hgap,
 667                   nrows * h + (nrows-1) * m_vgap);
 668 }
 669
 670 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 671 {
 672     wxPoint pt( x,y );
 673     wxSize sz( item->CalcMin() );
 674     int flag = item->GetFlag();
 675
 676     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 677     {
 678        sz = wxSize(w, h);
 679     }
 680     else
 681     {
 682         if (flag & wxALIGN_CENTER_HORIZONTAL)
 683         {
 684             pt.x = x + (w - sz.x) / 2;
 685         }
 686         else if (flag & wxALIGN_RIGHT)
 687         {
 688             pt.x = x + (w - sz.x);
 689         }
 690
 691         if (flag & wxALIGN_CENTER_VERTICAL)
 692         {
 693             pt.y = y + (h - sz.y) / 2;
 694         }
 695         else if (flag & wxALIGN_BOTTOM)
 696         {
 697             pt.y = y + (h - sz.y);
 698         }
 699     }
 700
 701     item->SetDimension(pt, sz);
 702 }
 703
 704 //---------------------------------------------------------------------------
 705 // wxFlexGridSizer
 706 //---------------------------------------------------------------------------
 707
 708 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 709    : wxGridSizer( rows, cols, vgap, hgap )
 710 {
 711     m_rowHeights = (int*) NULL;
 712     m_colWidths = (int*) NULL;
 713 }
 714
 715 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 716    : wxGridSizer( cols, vgap, hgap )
 717 {
 718     m_rowHeights = (int*) NULL;
 719     m_colWidths = (int*) NULL;
 720 }
 721
 722 wxFlexGridSizer::~wxFlexGridSizer()
 723 {
 724     if (m_rowHeights)
 725         delete[] m_rowHeights;
 726     if (m_colWidths)
 727         delete[] m_colWidths;
 728 }
 729
 730 void wxFlexGridSizer::CreateArrays()
 731 {
 732     if (m_rowHeights)
 733         delete[] m_rowHeights;
 734     if (m_colWidths)
 735         delete[] m_colWidths;
 736
 737     if (m_children.GetCount() == 0)
 738         return;
 739
 740     int nitems = m_children.GetCount();
 741     int nrows = m_rows;
 742     int ncols = m_cols;
 743
 744     if (ncols > 0)
 745         nrows = (nitems + ncols-1) / ncols;
 746     else
 747         ncols = (nitems + nrows-1) / nrows;
 748
 749     m_rowHeights = new int[nrows];
 750     m_colWidths = new int[ncols];
 751
 752     for (int col = 0; col < ncols; col++)
 753         m_colWidths[ col ] = 0;
 754     for (int row = 0; row < nrows; row++)
 755         m_rowHeights[ row ] = 0;
 756 }
 757
 758 void wxFlexGridSizer::RecalcSizes()
 759 {
 760     if (m_children.GetCount() == 0)
 761         return;
 762
 763     int nitems = m_children.GetCount();
 764     int nrows = m_rows;
 765     int ncols = m_cols;
 766
 767     if (ncols > 0)
 768         nrows = (nitems + ncols-1) / ncols;
 769     else
 770         ncols = (nitems + nrows-1) / nrows;
 771
 772     wxSize sz( GetSize() );
 773     wxSize minsz( CalcMin() );
 774     wxPoint pt( GetPosition() );
 775     int    delta;
 776     size_t idx;
 777
 778     if ((m_growableRows.GetCount() > 0) && (sz.y > minsz.y))
 779     {
 780         delta = (sz.y - minsz.y) / m_growableRows.GetCount();
 781         for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 782             m_rowHeights[ m_growableRows[idx] ] += delta;
 783     }
 784
 785     if ((m_growableCols.GetCount() > 0) && (sz.x > minsz.x))
 786     {
 787         delta = (sz.x - minsz.x) / m_growableCols.GetCount();
 788         for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 789             m_colWidths[ m_growableCols[idx] ] += delta;
 790     }
 791
 792     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 793
 794     int x = pt.x;
 795     for (int c = 0; c < ncols; c++)
 796     {
 797         int y = pt.y;
 798         for (int r = 0; r < nrows; r++)
 799         {
 800             int i = r * ncols + c;
 801             if (i < nitems)
 802             {
 803                 wxNode *node = m_children.Nth( i );
 804                 wxASSERT( node );
 805
 806                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 807                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 808
 809                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 810             }
 811             y = y + m_rowHeights[r] + m_vgap;
 812         }
 813         x = x + m_colWidths[c] + m_hgap;
 814     }
 815 }
 816
 817 wxSize wxFlexGridSizer::CalcMin()
 818 {
 819     if (m_children.GetCount() == 0)
 820         return wxSize(10,10);
 821
 822     int nitems = m_children.GetCount();
 823     int nrows = m_rows;
 824     int ncols = m_cols;
 825
 826     if (ncols > 0)
 827         nrows = (nitems + ncols-1) / ncols;
 828     else
 829         ncols = (nitems + nrows-1) / nrows;
 830
 831     CreateArrays();
 832
 833     int col;
 834     int row;
 835
 836     int i = 0;
 837     wxNode *node = m_children.First();
 838     while (node)
 839     {
 840         wxSizerItem *item = (wxSizerItem*)node->Data();
 841         wxSize sz( item->CalcMin() );
 842         row = i / ncols;
 843         col = i % ncols;
 844         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
 845         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
 846
 847         node = node->Next();
 848         i++;
 849     }
 850
 851     int width = 0;
 852     for (col = 0; col < ncols; col++)
 853         width += m_colWidths[ col ];
 854
 855     int height = 0;
 856     for (row = 0; row < nrows; row++)
 857         height += m_rowHeights[ row ];
 858
 859     return wxSize( width +  (ncols-1) * m_hgap,
 860                    height + (nrows-1) * m_vgap);
 861 }
 862
 863 void wxFlexGridSizer::AddGrowableRow( size_t idx )
 864 {
 865     m_growableRows.Add( idx );
 866 }
 867
 868 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
 869 {
 870 }
 871
 872 void wxFlexGridSizer::AddGrowableCol( size_t idx )
 873 {
 874     m_growableCols.Add( idx );
 875 }
 876
 877 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
 878 {
 879 }
 880
 881 //---------------------------------------------------------------------------
 882 // wxBoxSizer
 883 //---------------------------------------------------------------------------
 884
 885 wxBoxSizer::wxBoxSizer( int orient )
 886 {
 887     m_orient = orient;
 888 }
 889
 890 void wxBoxSizer::RecalcSizes()
 891 {
 892     if (m_children.GetCount() == 0)
 893         return;
 894
 895     int delta = 0;
 896     int extra = 0;
 897     if (m_stretchable)
 898     {
 899         if (m_orient == wxHORIZONTAL)
 900         {
 901             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 902             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 903         }
 904         else
 905         {
 906             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 907             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 908         }
 909     }
 910
 911     wxPoint pt( m_position );
 912
 913     wxNode *node = m_children.GetFirst();
 914     while (node)
 915     {
 916         wxSizerItem *item = (wxSizerItem*) node->Data();
 917
 918         int weight = 1;
 919         if (item->GetOption())
 920             weight = item->GetOption();
 921
 922         wxSize size( item->CalcMin() );
 923
 924         if (m_orient == wxVERTICAL)
 925         {
 926             wxCoord height = size.y;
 927             if (item->GetOption())
 928             {
 929                 height = (delta * weight) + extra;
 930                 extra = 0; // only the first item will get the remainder as extra size
 931             }
 932
 933             wxPoint child_pos( pt );
 934             wxSize  child_size( wxSize( size.x, height) );
 935
 936             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 937                 child_size.x = m_size.x;
 938             else if (item->GetFlag() & wxALIGN_RIGHT)
 939                 child_pos.x += m_size.x - size.x;
 940             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
 941             // XXX wxCENTER is added for backward compatibility;
 942             //     wxALIGN_CENTER should be used in new code
 943                 child_pos.x += (m_size.x - size.x) / 2;
 944
 945             item->SetDimension( child_pos, child_size );
 946
 947             pt.y += height;
 948         }
 949         else
 950         {
 951             wxCoord width = size.x;
 952             if (item->GetOption())
 953             {
 954                 width = (delta * weight) + extra;
 955                 extra = 0; // only the first item will get the remainder as extra size
 956             }
 957
 958             wxPoint child_pos( pt );
 959             wxSize  child_size( wxSize(width, size.y) );
 960
 961             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 962                 child_size.y = m_size.y;
 963             else if (item->GetFlag() & wxALIGN_BOTTOM)
 964                 child_pos.y += m_size.y - size.y;
 965             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
 966             // XXX wxCENTER is added for backward compatibility;
 967             //     wxALIGN_CENTER should be used in new code
 968                 child_pos.y += (m_size.y - size.y) / 2;
 969
 970             item->SetDimension( child_pos, child_size );
 971
 972             pt.x += width;
 973         }
 974
 975         node = node->Next();
 976     }
 977 }
 978
 979 wxSize wxBoxSizer::CalcMin()
 980 {
 981     if (m_children.GetCount() == 0)
 982         return wxSize(10,10);
 983
 984     m_stretchable = 0;
 985     m_minWidth = 0;
 986     m_minHeight = 0;
 987     m_fixedWidth = 0;
 988     m_fixedHeight = 0;
 989
 990     // Find how long each stretch unit needs to be
 991     int stretchSize = 1;
 992     wxNode *node = m_children.GetFirst();
 993     while (node)
 994     {
 995         wxSizerItem *item = (wxSizerItem*) node->Data();
 996         if (item->GetOption() != 0)
 997         {
 998             int stretch = item->GetOption();
 999             wxSize size( item->CalcMin() );
1000             int sizePerStretch;
1001             // Integer division rounded up is (a + b - 1) / b
1002             if (m_orient == wxHORIZONTAL)
1003                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1004             else
1005                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1006             if (sizePerStretch > stretchSize)
1007                 stretchSize = sizePerStretch;
1008         }
1009         node = node->Next();
1010     }
1011         // Calculate overall minimum size
1012         node = m_children.GetFirst();
1013     while (node)
1014     {
1015         wxSizerItem *item = (wxSizerItem*) node->Data();
1016
1017         m_stretchable += item->GetOption();
1018
1019         wxSize size( item->CalcMin() );
1020         if (item->GetOption() != 0)
1021         {
1022             if (m_orient == wxHORIZONTAL)
1023                 size.x = stretchSize * item->GetOption();
1024             else
1025                 size.y = stretchSize * item->GetOption();
1026         }
1027
1028         if (m_orient == wxHORIZONTAL)
1029         {
1030             m_minWidth += size.x;
1031             m_minHeight = wxMax( m_minHeight, size.y );
1032         }
1033         else
1034         {
1035             m_minHeight += size.y;
1036             m_minWidth = wxMax( m_minWidth, size.x );
1037         }
1038
1039         if (item->GetOption() == 0)
1040         {
1041             if (m_orient == wxVERTICAL)
1042             {
1043                 m_fixedHeight += size.y;
1044                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
1045             }
1046             else
1047             {
1048                 m_fixedWidth += size.x;
1049                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
1050             }
1051         }
1052
1053         node = node->Next();
1054     }
1055
1056     return wxSize( m_minWidth, m_minHeight );
1057 }
1058
1059 //---------------------------------------------------------------------------
1060 // wxStaticBoxSizer
1061 //---------------------------------------------------------------------------
1062
1063 #if wxUSE_STATBOX
1064
1065 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1066                 : wxBoxSizer( orient )
1067 {
1068     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1069
1070     m_staticBox = box;
1071 }
1072
1073 static void GetStaticBoxBorders(wxStaticBox *box,
1074                                 int *borderTop, int *borderOther)
1075 {
1076     // this has to be done platform by platform as there is no way to
1077     // guess the thickness of a wxStaticBox border
1078 #ifdef __WXGTK__
1079     if ( box->GetLabel().IsEmpty() )
1080         *borderTop = 5;
1081     else
1082 #endif // __WXGTK__
1083         *borderTop = 15;
1084         (void)box;
1085     *borderOther = 5;
1086 }
1087
1088 void wxStaticBoxSizer::RecalcSizes()
1089 {
1090     int top_border, other_border;
1091     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1092
1093     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1094
1095     wxPoint old_pos( m_position );
1096     m_position.x += other_border;
1097     m_position.y += top_border;
1098     wxSize old_size( m_size );
1099     m_size.x -= 2*other_border;
1100     m_size.y -= top_border + other_border;
1101
1102     wxBoxSizer::RecalcSizes();
1103
1104     m_position = old_pos;
1105     m_size = old_size;
1106 }
1107
1108 wxSize wxStaticBoxSizer::CalcMin()
1109 {
1110     int top_border, other_border;
1111     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1112
1113     wxSize ret( wxBoxSizer::CalcMin() );
1114     ret.x += 2*other_border;
1115     ret.y += other_border + top_border;
1116
1117     return ret;
1118 }
1119
1120 #endif // wxUSE_STATBOX
1121
1122 //---------------------------------------------------------------------------
1123 // wxNotebookSizer
1124 //---------------------------------------------------------------------------
1125
1126 #if wxUSE_NOTEBOOK
1127
1128 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1129 {
1130     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1131
1132     m_notebook = nb;
1133 }
1134
1135 void wxNotebookSizer::RecalcSizes()
1136 {
1137     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1138 }
1139
1140 wxSize wxNotebookSizer::CalcMin()
1141 {
1142     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1143
1144     sizeBorder.x += 5;
1145     sizeBorder.y += 5;
1146
1147     if (m_notebook->GetChildren().GetCount() == 0)
1148     {
1149         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1150     }
1151
1152     int maxX = 0;
1153     int maxY = 0;
1154
1155     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1156     while (node)
1157     {
1158         wxWindow *item = node->GetData();
1159         wxSizer *itemsizer = item->GetSizer();
1160
1161         if (itemsizer)
1162         {
1163             wxSize subsize( itemsizer->CalcMin() );
1164
1165             if (subsize.x > maxX)
1166                 maxX = subsize.x;
1167             if (subsize.y > maxY)
1168                 maxY = subsize.y;
1169         }
1170
1171         node = node->GetNext();
1172     }
1173
1174     return wxSize( maxX, maxY ) + sizeBorder;
1175 }
1176
1177 #endif // wxUSE_NOTEBOOK
1178
1179 // vi:sts=4:sw=4:et