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: Ron Lee
   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 wxSize 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     return size;
 414 }
 415
 416 void wxSizer::FitInside( wxWindow *window )
 417 {
 418     wxSize size;
 419     if (window->IsTopLevel())
 420         size = VirtualFitSize( window );
 421     else
 422         size = GetMinClientSize( window );
 423
 424     window->SetVirtualSize( size );
 425 }
 426
 427 void wxSizer::Layout()
 428 {
 429     CalcMin();
 430     RecalcSizes();
 431 }
 432
 433 void wxSizer::SetSizeHints( wxWindow *window )
 434 {
 435     // Preserve the window's max size hints, but set the
 436     // lower bound according to the sizer calculations.
 437
 438     wxSize size = Fit( window );
 439
 440     window->SetSizeHints( size.x,
 441                           size.y,
 442                           window->GetMaxWidth(),
 443                           window->GetMaxHeight() );
 444 }
 445
 446 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 447 {
 448     // Preserve the window's max size hints, but set the
 449     // lower bound according to the sizer calculations.
 450
 451     FitInside( window );
 452     wxSize size( window->GetVirtualSize() );
 453     window->SetVirtualSizeHints( size.x,
 454                                  size.y,
 455                                  window->GetMaxWidth(),
 456                                  window->GetMaxHeight() );
 457 }
 458
 459 wxSize wxSizer::GetMaxWindowSize( wxWindow *window )
 460 {
 461     return window->GetMaxSize();
 462 }
 463
 464 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 465 {
 466     wxSize minSize( GetMinSize() );
 467     wxSize size( window->GetSize() );
 468     wxSize client_size( window->GetClientSize() );
 469     return wxSize( minSize.x+size.x-client_size.x,
 470                    minSize.y+size.y-client_size.y );
 471 }
 472
 473 // Return a window size that will fit within the screens dimensions
 474 wxSize wxSizer::FitSize( wxWindow *window )
 475 {
 476     wxSize size     = GetMinWindowSize( window );
 477     wxSize sizeMax  = GetMaxWindowSize( window );
 478
 479     // Limit the size if sizeMax != wxDefaultSize
 480
 481     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 482         size.x = sizeMax.x;
 483     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 484         size.y = sizeMax.y;
 485
 486     return size;
 487 }
 488
 489 wxSize wxSizer::GetMaxClientSize( wxWindow *window )
 490 {
 491     wxSize maxSize( window->GetMaxSize() );
 492
 493     if( maxSize != wxDefaultSize )
 494     {
 495         wxSize size( window->GetSize() );
 496         wxSize client_size( window->GetClientSize() );
 497
 498         return wxSize( maxSize.x + client_size.x - size.x,
 499                        maxSize.y + client_size.y - size.y );
 500     }
 501     else
 502         return wxDefaultSize;
 503 }
 504
 505 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
 506 {
 507     return GetMinSize();  // Already returns client size.
 508 }
 509
 510 wxSize wxSizer::VirtualFitSize( wxWindow *window )
 511 {
 512     wxSize size     = GetMinClientSize( window );
 513     wxSize sizeMax  = GetMaxClientSize( window );
 514
 515     // Limit the size if sizeMax != wxDefaultSize
 516
 517     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 518         size.x = sizeMax.x;
 519     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 520         size.y = sizeMax.y;
 521
 522     return size;
 523 }
 524
 525 void wxSizer::SetDimension( int x, int y, int width, int height )
 526 {
 527     m_position.x = x;
 528     m_position.y = y;
 529     m_size.x = width;
 530     m_size.y = height;
 531     CalcMin();
 532     RecalcSizes();
 533 }
 534
 535 wxSize wxSizer::GetMinSize()
 536 {
 537     wxSize ret( CalcMin() );
 538     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 539     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 540     return ret;
 541 }
 542
 543 void wxSizer::DoSetMinSize( int width, int height )
 544 {
 545     m_minSize.x = width;
 546     m_minSize.y = height;
 547 }
 548
 549 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 550 {
 551     wxASSERT( window );
 552
 553     wxNode *node = m_children.First();
 554     while (node)
 555     {
 556         wxSizerItem *item = (wxSizerItem*)node->Data();
 557         if (item->GetWindow() == window)
 558         {
 559             item->SetInitSize( width, height );
 560             return TRUE;
 561         }
 562         node = node->Next();
 563     }
 564
 565     node = m_children.First();
 566     while (node)
 567     {
 568         wxSizerItem *item = (wxSizerItem*)node->Data();
 569         if (item->GetSizer())
 570         {
 571             // It's a sizer, so lets search recursively.
 572             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 573             {
 574                 // A child sizer found the requested windw, exit.
 575                 return TRUE;
 576             }
 577         }
 578         node = node->Next();
 579     }
 580
 581     return FALSE;
 582 }
 583
 584 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 585 {
 586     wxASSERT( sizer );
 587
 588     wxNode *node = m_children.First();
 589     while (node)
 590     {
 591         wxSizerItem *item = (wxSizerItem*)node->Data();
 592         if (item->GetSizer() == sizer)
 593         {
 594             item->GetSizer()->DoSetMinSize( width, height );
 595             return TRUE;
 596         }
 597         node = node->Next();
 598     }
 599
 600     node = m_children.First();
 601     while (node)
 602     {
 603         wxSizerItem *item = (wxSizerItem*)node->Data();
 604         if (item->GetSizer())
 605         {
 606             // It's a sizer, so lets search recursively.
 607             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 608             {
 609                 // A child sizer found the requested windw, exit.
 610                 return TRUE;
 611             }
 612         }
 613         node = node->Next();
 614     }
 615
 616     return FALSE;
 617 }
 618
 619 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 620 {
 621     wxNode *node = m_children.Nth( pos );
 622     if (!node) return FALSE;
 623
 624     wxSizerItem *item = (wxSizerItem*) node->Data();
 625     if (item->GetSizer())
 626     {
 627         // Sizers contains the minimal size in them, if not calculated ...
 628         item->GetSizer()->DoSetMinSize( width, height );
 629     }
 630     else
 631     {
 632         // ... but the minimal size of spacers and windows in stored in them
 633         item->SetInitSize( width, height );
 634     }
 635
 636     return TRUE;
 637 }
 638
 639 //---------------------------------------------------------------------------
 640 // wxGridSizer
 641 //---------------------------------------------------------------------------
 642
 643 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 644 {
 645     m_rows = rows;
 646     m_cols = cols;
 647     m_vgap = vgap;
 648     m_hgap = hgap;
 649 }
 650
 651 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 652 {
 653     m_rows = 0;
 654     m_cols = cols;
 655     m_vgap = vgap;
 656     m_hgap = hgap;
 657 }
 658
 659 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
 660 {
 661     int nitems = m_children.GetCount();
 662     if ( nitems)
 663     {
 664         if ( m_cols )
 665         {
 666             ncols = m_cols;
 667             nrows = (nitems + m_cols - 1) / m_cols;
 668         }
 669         else if ( m_rows )
 670         {
 671             ncols = (nitems + m_rows - 1) / m_rows;
 672             nrows = m_rows;
 673         }
 674         else // 0 columns, 0 rows?
 675         {
 676             wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
 677
 678             nrows = ncols = 0;
 679         }
 680     }
 681
 682     return nitems;
 683 }
 684
 685 void wxGridSizer::RecalcSizes()
 686 {
 687     int nitems, nrows, ncols;
 688     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 689         return;
 690
 691     wxSize sz( GetSize() );
 692     wxPoint pt( GetPosition() );
 693
 694     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 695     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 696
 697     int x = pt.x;
 698     for (int c = 0; c < ncols; c++)
 699     {
 700         int y = pt.y;
 701         for (int r = 0; r < nrows; r++)
 702         {
 703             int i = r * ncols + c;
 704             if (i < nitems)
 705             {
 706                 wxNode *node = m_children.Nth( i );
 707                 wxASSERT( node );
 708
 709                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 710             }
 711             y = y + h + m_vgap;
 712         }
 713         x = x + w + m_hgap;
 714     }
 715 }
 716
 717 wxSize wxGridSizer::CalcMin()
 718 {
 719     int nitems, nrows, ncols;
 720     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 721         return wxSize(10, 10);
 722
 723     // Find the max width and height for any component
 724     int w = 0;
 725     int h = 0;
 726
 727     wxNode *node = m_children.First();
 728     while (node)
 729     {
 730         wxSizerItem *item = (wxSizerItem*)node->Data();
 731         wxSize sz( item->CalcMin() );
 732         w = wxMax( w, sz.x );
 733         h = wxMax( h, sz.y );
 734
 735         node = node->Next();
 736     }
 737
 738     return wxSize(ncols * w + (ncols-1) * m_hgap,
 739                   nrows * h + (nrows-1) * m_vgap);
 740 }
 741
 742 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 743 {
 744     wxPoint pt( x,y );
 745     wxSize sz( item->CalcMin() );
 746     int flag = item->GetFlag();
 747
 748     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 749     {
 750        sz = wxSize(w, h);
 751     }
 752     else
 753     {
 754         if (flag & wxALIGN_CENTER_HORIZONTAL)
 755         {
 756             pt.x = x + (w - sz.x) / 2;
 757         }
 758         else if (flag & wxALIGN_RIGHT)
 759         {
 760             pt.x = x + (w - sz.x);
 761         }
 762
 763         if (flag & wxALIGN_CENTER_VERTICAL)
 764         {
 765             pt.y = y + (h - sz.y) / 2;
 766         }
 767         else if (flag & wxALIGN_BOTTOM)
 768         {
 769             pt.y = y + (h - sz.y);
 770         }
 771     }
 772
 773     item->SetDimension(pt, sz);
 774 }
 775
 776 //---------------------------------------------------------------------------
 777 // wxFlexGridSizer
 778 //---------------------------------------------------------------------------
 779
 780 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 781    : wxGridSizer( rows, cols, vgap, hgap )
 782 {
 783     m_rowHeights = (int*) NULL;
 784     m_colWidths = (int*) NULL;
 785 }
 786
 787 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 788    : wxGridSizer( cols, vgap, hgap )
 789 {
 790     m_rowHeights = (int*) NULL;
 791     m_colWidths = (int*) NULL;
 792 }
 793
 794 wxFlexGridSizer::~wxFlexGridSizer()
 795 {
 796     if (m_rowHeights)
 797         delete[] m_rowHeights;
 798     if (m_colWidths)
 799         delete[] m_colWidths;
 800 }
 801
 802 void wxFlexGridSizer::CreateArrays()
 803 {
 804     if (m_rowHeights)
 805         delete[] m_rowHeights;
 806     if (m_colWidths)
 807         delete[] m_colWidths;
 808
 809     int nitems, nrows, ncols;
 810     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 811     {
 812         m_rowHeights =
 813         m_colWidths = NULL;
 814     }
 815
 816     m_rowHeights = new int[nrows];
 817     m_colWidths = new int[ncols];
 818
 819     for (int col = 0; col < ncols; col++)
 820         m_colWidths[ col ] = 0;
 821     for (int row = 0; row < nrows; row++)
 822         m_rowHeights[ row ] = 0;
 823 }
 824
 825 void wxFlexGridSizer::RecalcSizes()
 826 {
 827     int nitems, nrows, ncols;
 828     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 829         return;
 830
 831     wxSize sz( GetSize() );
 832     wxSize minsz( CalcMin() );
 833     wxPoint pt( GetPosition() );
 834     int    delta;
 835     size_t idx,num;
 836     wxArrayInt temp;
 837
 838     // Transfer only those rows into temp which exist in the sizer
 839     // ignoring the superflouus ones. This prevents a segfault when
 840     // calling AddGrowableRow( 3 ) if the sizer only has 2 rows.
 841     for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 842         if (m_growableRows[idx] < nrows)
 843             temp.Add( m_growableRows[idx] );
 844     num = temp.GetCount();
 845
 846     if ((num > 0) && (sz.y > minsz.y))
 847     {
 848         delta = (sz.y - minsz.y) / num;
 849         for (idx = 0; idx < num; idx++)
 850             m_rowHeights[ temp[idx] ] += delta;
 851     }
 852
 853     temp.Empty();
 854     // See above
 855     for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 856         if (m_growableCols[idx] < ncols)
 857             temp.Add( m_growableCols[idx] );
 858     num = temp.GetCount();
 859
 860     if ((num > 0) && (sz.x > minsz.x))
 861     {
 862         delta = (sz.x - minsz.x) / num;
 863         for (idx = 0; idx < num; idx++)
 864             m_colWidths[ temp[idx] ] += delta;
 865     }
 866
 867     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 868
 869     int x = pt.x;
 870     for (int c = 0; c < ncols; c++)
 871     {
 872         int y = pt.y;
 873         for (int r = 0; r < nrows; r++)
 874         {
 875             int i = r * ncols + c;
 876             if (i < nitems)
 877             {
 878                 wxNode *node = m_children.Nth( i );
 879                 wxASSERT( node );
 880
 881                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 882                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 883
 884                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 885             }
 886             y = y + m_rowHeights[r] + m_vgap;
 887         }
 888         x = x + m_colWidths[c] + m_hgap;
 889     }
 890 }
 891
 892 wxSize wxFlexGridSizer::CalcMin()
 893 {
 894     int nitems, nrows, ncols;
 895     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 896         return wxSize(10,10);
 897
 898     CreateArrays();
 899
 900     int i = 0;
 901     wxNode *node = m_children.First();
 902     while (node)
 903     {
 904         wxSizerItem *item = (wxSizerItem*)node->Data();
 905         wxSize sz( item->CalcMin() );
 906         int row = i / ncols;
 907         int col = i % ncols;
 908         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
 909         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
 910
 911         node = node->Next();
 912         i++;
 913     }
 914
 915     int width = 0;
 916     for (int col = 0; col < ncols; col++)
 917         width += m_colWidths[ col ];
 918
 919     int height = 0;
 920     for (int row = 0; row < nrows; row++)
 921         height += m_rowHeights[ row ];
 922
 923     return wxSize( width +  (ncols-1) * m_hgap,
 924                    height + (nrows-1) * m_vgap);
 925 }
 926
 927 void wxFlexGridSizer::AddGrowableRow( size_t idx )
 928 {
 929     m_growableRows.Add( idx );
 930 }
 931
 932 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
 933 {
 934 }
 935
 936 void wxFlexGridSizer::AddGrowableCol( size_t idx )
 937 {
 938     m_growableCols.Add( idx );
 939 }
 940
 941 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
 942 {
 943 }
 944
 945 //---------------------------------------------------------------------------
 946 // wxBoxSizer
 947 //---------------------------------------------------------------------------
 948
 949 wxBoxSizer::wxBoxSizer( int orient )
 950 {
 951     m_orient = orient;
 952 }
 953
 954 void wxBoxSizer::RecalcSizes()
 955 {
 956     if (m_children.GetCount() == 0)
 957         return;
 958
 959     int delta = 0;
 960     int extra = 0;
 961     if (m_stretchable)
 962     {
 963         if (m_orient == wxHORIZONTAL)
 964         {
 965             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 966             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 967         }
 968         else
 969         {
 970             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 971             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 972         }
 973     }
 974
 975     wxPoint pt( m_position );
 976
 977     wxNode *node = m_children.GetFirst();
 978     while (node)
 979     {
 980         wxSizerItem *item = (wxSizerItem*) node->Data();
 981
 982         int weight = 1;
 983         if (item->GetOption())
 984             weight = item->GetOption();
 985
 986         wxSize size( item->CalcMin() );
 987
 988         if (m_orient == wxVERTICAL)
 989         {
 990             wxCoord height = size.y;
 991             if (item->GetOption())
 992             {
 993                 height = (delta * weight) + extra;
 994                 extra = 0; // only the first item will get the remainder as extra size
 995             }
 996
 997             wxPoint child_pos( pt );
 998             wxSize  child_size( wxSize( size.x, height) );
 999
1000             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1001                 child_size.x = m_size.x;
1002             else if (item->GetFlag() & wxALIGN_RIGHT)
1003                 child_pos.x += m_size.x - size.x;
1004             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
1005             // XXX wxCENTER is added for backward compatibility;
1006             //     wxALIGN_CENTER should be used in new code
1007                 child_pos.x += (m_size.x - size.x) / 2;
1008
1009             item->SetDimension( child_pos, child_size );
1010
1011             pt.y += height;
1012         }
1013         else
1014         {
1015             wxCoord width = size.x;
1016             if (item->GetOption())
1017             {
1018                 width = (delta * weight) + extra;
1019                 extra = 0; // only the first item will get the remainder as extra size
1020             }
1021
1022             wxPoint child_pos( pt );
1023             wxSize  child_size( wxSize(width, size.y) );
1024
1025             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1026                 child_size.y = m_size.y;
1027             else if (item->GetFlag() & wxALIGN_BOTTOM)
1028                 child_pos.y += m_size.y - size.y;
1029             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
1030             // XXX wxCENTER is added for backward compatibility;
1031             //     wxALIGN_CENTER should be used in new code
1032                 child_pos.y += (m_size.y - size.y) / 2;
1033
1034             item->SetDimension( child_pos, child_size );
1035
1036             pt.x += width;
1037         }
1038
1039         node = node->Next();
1040     }
1041 }
1042
1043 wxSize wxBoxSizer::CalcMin()
1044 {
1045     if (m_children.GetCount() == 0)
1046         return wxSize(10,10);
1047
1048     m_stretchable = 0;
1049     m_minWidth = 0;
1050     m_minHeight = 0;
1051     m_fixedWidth = 0;
1052     m_fixedHeight = 0;
1053
1054     // Find how long each stretch unit needs to be
1055     int stretchSize = 1;
1056     wxNode *node = m_children.GetFirst();
1057     while (node)
1058     {
1059         wxSizerItem *item = (wxSizerItem*) node->Data();
1060         if (item->GetOption() != 0)
1061         {
1062             int stretch = item->GetOption();
1063             wxSize size( item->CalcMin() );
1064             int sizePerStretch;
1065             // Integer division rounded up is (a + b - 1) / b
1066             if (m_orient == wxHORIZONTAL)
1067                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1068             else
1069                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1070             if (sizePerStretch > stretchSize)
1071                 stretchSize = sizePerStretch;
1072         }
1073         node = node->Next();
1074     }
1075     // Calculate overall minimum size
1076     node = m_children.GetFirst();
1077     while (node)
1078     {
1079         wxSizerItem *item = (wxSizerItem*) node->Data();
1080
1081         m_stretchable += item->GetOption();
1082
1083         wxSize size( item->CalcMin() );
1084         if (item->GetOption() != 0)
1085         {
1086             if (m_orient == wxHORIZONTAL)
1087                 size.x = stretchSize * item->GetOption();
1088             else
1089                 size.y = stretchSize * item->GetOption();
1090         }
1091
1092         if (m_orient == wxHORIZONTAL)
1093         {
1094             m_minWidth += size.x;
1095             m_minHeight = wxMax( m_minHeight, size.y );
1096         }
1097         else
1098         {
1099             m_minHeight += size.y;
1100             m_minWidth = wxMax( m_minWidth, size.x );
1101         }
1102
1103         if (item->GetOption() == 0)
1104         {
1105             if (m_orient == wxVERTICAL)
1106             {
1107                 m_fixedHeight += size.y;
1108                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
1109             }
1110             else
1111             {
1112                 m_fixedWidth += size.x;
1113                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
1114             }
1115         }
1116
1117         node = node->Next();
1118     }
1119
1120     return wxSize( m_minWidth, m_minHeight );
1121 }
1122
1123 //---------------------------------------------------------------------------
1124 // wxStaticBoxSizer
1125 //---------------------------------------------------------------------------
1126
1127 #if wxUSE_STATBOX
1128
1129 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1130                 : wxBoxSizer( orient )
1131 {
1132     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1133
1134     m_staticBox = box;
1135 }
1136
1137 static void GetStaticBoxBorders(wxStaticBox *box,
1138                                 int *borderTop, int *borderOther)
1139 {
1140     // this has to be done platform by platform as there is no way to
1141     // guess the thickness of a wxStaticBox border
1142 #ifdef __WXGTK__
1143     if ( box->GetLabel().IsEmpty() )
1144         *borderTop = 5;
1145     else
1146 #endif // __WXGTK__
1147         *borderTop = 15;
1148     (void)box;
1149     *borderOther = 5;
1150 }
1151
1152 void wxStaticBoxSizer::RecalcSizes()
1153 {
1154     int top_border, other_border;
1155     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1156
1157     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1158
1159     wxPoint old_pos( m_position );
1160     m_position.x += other_border;
1161     m_position.y += top_border;
1162     wxSize old_size( m_size );
1163     m_size.x -= 2*other_border;
1164     m_size.y -= top_border + other_border;
1165
1166     wxBoxSizer::RecalcSizes();
1167
1168     m_position = old_pos;
1169     m_size = old_size;
1170 }
1171
1172 wxSize wxStaticBoxSizer::CalcMin()
1173 {
1174     int top_border, other_border;
1175     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1176
1177     wxSize ret( wxBoxSizer::CalcMin() );
1178     ret.x += 2*other_border;
1179     ret.y += other_border + top_border;
1180
1181     return ret;
1182 }
1183
1184 #endif // wxUSE_STATBOX
1185
1186 //---------------------------------------------------------------------------
1187 // wxNotebookSizer
1188 //---------------------------------------------------------------------------
1189
1190 #if wxUSE_NOTEBOOK
1191
1192 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1193 {
1194     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1195
1196     m_notebook = nb;
1197 }
1198
1199 void wxNotebookSizer::RecalcSizes()
1200 {
1201     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1202 }
1203
1204 wxSize wxNotebookSizer::CalcMin()
1205 {
1206     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1207
1208     sizeBorder.x += 5;
1209     sizeBorder.y += 5;
1210
1211     if (m_notebook->GetChildren().GetCount() == 0)
1212     {
1213         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1214     }
1215
1216     int maxX = 0;
1217     int maxY = 0;
1218
1219     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1220     while (node)
1221     {
1222         wxWindow *item = node->GetData();
1223         wxSizer *itemsizer = item->GetSizer();
1224
1225         if (itemsizer)
1226         {
1227             wxSize subsize( itemsizer->CalcMin() );
1228
1229             if (subsize.x > maxX)
1230                 maxX = subsize.x;
1231             if (subsize.y > maxY)
1232                 maxY = subsize.y;
1233         }
1234
1235         node = node->GetNext();
1236     }
1237
1238     return wxSize( maxX, maxY ) + sizeBorder;
1239 }
1240
1241 #endif // wxUSE_NOTEBOOK
1242
1243 // vi:sts=4:sw=4:et