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     wxSize size = FitSize( window );
 423     window->SetSizeHints( size.x, size.y );
 424 }
 425
 426 wxSize wxSizer::GetMaxWindowSize( wxWindow *WXUNUSED(window) )
 427 {
 428     wxRect rect = wxGetClientDisplayRect();
 429     wxSize sizeMax (rect.width,rect.height);
 430
 431     // Sorry, but this bit is wrong -- it makes a window that should just be
 432     // able to fit onto the screen, not fit on the screen. -- JACS
 433 #if 0
 434     // Make the max size a bit smaller than the visible portion of
 435     // the screen.  A window which takes the entire screen doesn't
 436     // look very nice either
 437     sizeMax.x *= 9;
 438     sizeMax.x /= 10;
 439
 440     sizeMax.y *= 9;
 441     sizeMax.y /= 10;
 442 #endif
 443
 444     return sizeMax;
 445 }
 446
 447 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 448 {
 449     wxSize minSize( GetMinSize() );
 450     wxSize size( window->GetSize() );
 451     wxSize client_size( window->GetClientSize() );
 452     return wxSize( minSize.x+size.x-client_size.x,
 453                    minSize.y+size.y-client_size.y );
 454 }
 455
 456 // Return a window size that will fit within the screens dimensions
 457 wxSize wxSizer::FitSize( wxWindow *window )
 458 {
 459     wxSize size     = GetMinWindowSize( window );
 460     wxSize sizeMax  = GetMaxWindowSize( window );
 461
 462     if ( size.x > sizeMax.x )
 463         size.x = sizeMax.x;
 464     if ( size.y > sizeMax.y )
 465         size.y = sizeMax.y;
 466
 467     return size;
 468 }
 469
 470 void wxSizer::SetDimension( int x, int y, int width, int height )
 471 {
 472     m_position.x = x;
 473     m_position.y = y;
 474     m_size.x = width;
 475     m_size.y = height;
 476     CalcMin();
 477     RecalcSizes();
 478 }
 479
 480 wxSize wxSizer::GetMinSize()
 481 {
 482     wxSize ret( CalcMin() );
 483     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 484     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 485     return ret;
 486 }
 487
 488 void wxSizer::DoSetMinSize( int width, int height )
 489 {
 490     m_minSize.x = width;
 491     m_minSize.y = height;
 492 }
 493
 494 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 495 {
 496     wxASSERT( window );
 497
 498     wxNode *node = m_children.First();
 499     while (node)
 500     {
 501         wxSizerItem *item = (wxSizerItem*)node->Data();
 502         if (item->GetWindow() == window)
 503         {
 504             item->SetInitSize( width, height );
 505             return TRUE;
 506         }
 507         node = node->Next();
 508     }
 509
 510     node = m_children.First();
 511     while (node)
 512     {
 513         wxSizerItem *item = (wxSizerItem*)node->Data();
 514         if (item->GetSizer())
 515         {
 516             /* It's a sizer, so lets search recursively. */
 517             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 518             {
 519                 /* A child sizer found the requested windw, exit. */
 520                 return TRUE;
 521             }
 522         }
 523         node = node->Next();
 524     }
 525
 526     return FALSE;
 527 }
 528
 529 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 530 {
 531     wxASSERT( sizer );
 532
 533     wxNode *node = m_children.First();
 534     while (node)
 535     {
 536         wxSizerItem *item = (wxSizerItem*)node->Data();
 537         if (item->GetSizer() == sizer)
 538         {
 539             item->GetSizer()->DoSetMinSize( width, height );
 540             return TRUE;
 541         }
 542         node = node->Next();
 543     }
 544
 545     node = m_children.First();
 546     while (node)
 547     {
 548         wxSizerItem *item = (wxSizerItem*)node->Data();
 549         if (item->GetSizer())
 550         {
 551             /* It's a sizer, so lets search recursively. */
 552             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 553             {
 554                 /* A child sizer found the requested windw, exit. */
 555                 return TRUE;
 556             }
 557         }
 558         node = node->Next();
 559     }
 560
 561     return FALSE;
 562 }
 563
 564 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 565 {
 566     wxNode *node = m_children.Nth( pos );
 567     if (!node) return FALSE;
 568
 569     wxSizerItem *item = (wxSizerItem*) node->Data();
 570     if (item->GetSizer())
 571     {
 572         /* Sizers contains the minimal size in them, if not calculated ... */
 573         item->GetSizer()->DoSetMinSize( width, height );
 574     }
 575     else
 576     {
 577         /* ... whereas the minimal size of spacers and windows in stored
 578            in the item */
 579         item->SetInitSize( width, height );
 580     }
 581
 582     return TRUE;
 583 }
 584
 585 //---------------------------------------------------------------------------
 586 // wxGridSizer
 587 //---------------------------------------------------------------------------
 588
 589 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 590 {
 591     m_rows = rows;
 592     m_cols = cols;
 593     m_vgap = vgap;
 594     m_hgap = hgap;
 595 }
 596
 597 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 598 {
 599     m_rows = 0;
 600     m_cols = cols;
 601     m_vgap = vgap;
 602     m_hgap = hgap;
 603 }
 604
 605 void wxGridSizer::RecalcSizes()
 606 {
 607     if (m_children.GetCount() == 0)
 608         return;
 609
 610     int nitems = m_children.GetCount();
 611     int nrows = m_rows;
 612     int ncols = m_cols;
 613
 614     if (ncols > 0)
 615         nrows = (nitems + ncols-1) / ncols;
 616     else
 617         ncols = (nitems + nrows-1) / nrows;
 618
 619     wxSize sz( GetSize() );
 620     wxPoint pt( GetPosition() );
 621
 622     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 623     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 624
 625     int x = pt.x;
 626     for (int c = 0; c < ncols; c++)
 627     {
 628         int y = pt.y;
 629         for (int r = 0; r < nrows; r++)
 630         {
 631             int i = r * ncols + c;
 632             if (i < nitems)
 633             {
 634                 wxNode *node = m_children.Nth( i );
 635                 wxASSERT( node );
 636
 637                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 638             }
 639             y = y + h + m_vgap;
 640         }
 641         x = x + w + m_hgap;
 642     }
 643 }
 644
 645 wxSize wxGridSizer::CalcMin()
 646 {
 647     if (m_children.GetCount() == 0)
 648         return wxSize(10,10);
 649
 650     int nitems = m_children.GetCount();
 651     int nrows = m_rows;
 652     int ncols = m_cols;
 653
 654     if (ncols > 0)
 655         nrows = (nitems + ncols-1) / ncols;
 656     else
 657         ncols = (nitems + nrows-1) / nrows;
 658
 659     /* Find the max width and height for any component */
 660     int w = 0;
 661     int h = 0;
 662
 663     wxNode *node = m_children.First();
 664     while (node)
 665     {
 666         wxSizerItem *item = (wxSizerItem*)node->Data();
 667         wxSize sz( item->CalcMin() );
 668         w = wxMax( w, sz.x );
 669         h = wxMax( h, sz.y );
 670
 671         node = node->Next();
 672     }
 673
 674     return wxSize(ncols * w + (ncols-1) * m_hgap,
 675                   nrows * h + (nrows-1) * m_vgap);
 676 }
 677
 678 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 679 {
 680     wxPoint pt( x,y );
 681     wxSize sz( item->CalcMin() );
 682     int flag = item->GetFlag();
 683
 684     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 685     {
 686        sz = wxSize(w, h);
 687     }
 688     else
 689     {
 690         if (flag & wxALIGN_CENTER_HORIZONTAL)
 691         {
 692             pt.x = x + (w - sz.x) / 2;
 693         }
 694         else if (flag & wxALIGN_RIGHT)
 695         {
 696             pt.x = x + (w - sz.x);
 697         }
 698
 699         if (flag & wxALIGN_CENTER_VERTICAL)
 700         {
 701             pt.y = y + (h - sz.y) / 2;
 702         }
 703         else if (flag & wxALIGN_BOTTOM)
 704         {
 705             pt.y = y + (h - sz.y);
 706         }
 707     }
 708
 709     item->SetDimension(pt, sz);
 710 }
 711
 712 //---------------------------------------------------------------------------
 713 // wxFlexGridSizer
 714 //---------------------------------------------------------------------------
 715
 716 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 717    : wxGridSizer( rows, cols, vgap, hgap )
 718 {
 719     m_rowHeights = (int*) NULL;
 720     m_colWidths = (int*) NULL;
 721 }
 722
 723 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 724    : wxGridSizer( cols, vgap, hgap )
 725 {
 726     m_rowHeights = (int*) NULL;
 727     m_colWidths = (int*) NULL;
 728 }
 729
 730 wxFlexGridSizer::~wxFlexGridSizer()
 731 {
 732     if (m_rowHeights)
 733         delete[] m_rowHeights;
 734     if (m_colWidths)
 735         delete[] m_colWidths;
 736 }
 737
 738 void wxFlexGridSizer::CreateArrays()
 739 {
 740     if (m_rowHeights)
 741         delete[] m_rowHeights;
 742     if (m_colWidths)
 743         delete[] m_colWidths;
 744
 745     if (m_children.GetCount() == 0)
 746         return;
 747
 748     int nitems = m_children.GetCount();
 749     int nrows = m_rows;
 750     int ncols = m_cols;
 751
 752     if (ncols > 0)
 753         nrows = (nitems + ncols-1) / ncols;
 754     else
 755         ncols = (nitems + nrows-1) / nrows;
 756
 757     m_rowHeights = new int[nrows];
 758     m_colWidths = new int[ncols];
 759
 760     for (int col = 0; col < ncols; col++)
 761         m_colWidths[ col ] = 0;
 762     for (int row = 0; row < nrows; row++)
 763         m_rowHeights[ row ] = 0;
 764 }
 765
 766 void wxFlexGridSizer::RecalcSizes()
 767 {
 768     if (m_children.GetCount() == 0)
 769         return;
 770
 771     int nitems = m_children.GetCount();
 772     int nrows = m_rows;
 773     int ncols = m_cols;
 774
 775     if (ncols > 0)
 776         nrows = (nitems + ncols-1) / ncols;
 777     else
 778         ncols = (nitems + nrows-1) / nrows;
 779
 780     wxSize sz( GetSize() );
 781     wxSize minsz( CalcMin() );
 782     wxPoint pt( GetPosition() );
 783     int    delta;
 784     size_t idx;
 785
 786     if ((m_growableRows.GetCount() > 0) && (sz.y > minsz.y))
 787     {
 788         delta = (sz.y - minsz.y) / m_growableRows.GetCount();
 789         for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 790             m_rowHeights[ m_growableRows[idx] ] += delta;
 791     }
 792
 793     if ((m_growableCols.GetCount() > 0) && (sz.x > minsz.x))
 794     {
 795         delta = (sz.x - minsz.x) / m_growableCols.GetCount();
 796         for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 797             m_colWidths[ m_growableCols[idx] ] += delta;
 798     }
 799
 800     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 801
 802     int x = pt.x;
 803     for (int c = 0; c < ncols; c++)
 804     {
 805         int y = pt.y;
 806         for (int r = 0; r < nrows; r++)
 807         {
 808             int i = r * ncols + c;
 809             if (i < nitems)
 810             {
 811                 wxNode *node = m_children.Nth( i );
 812                 wxASSERT( node );
 813
 814                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 815                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 816
 817                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 818             }
 819             y = y + m_rowHeights[r] + m_vgap;
 820         }
 821         x = x + m_colWidths[c] + m_hgap;
 822     }
 823 }
 824
 825 wxSize wxFlexGridSizer::CalcMin()
 826 {
 827     if (m_children.GetCount() == 0)
 828         return wxSize(10,10);
 829
 830     int nitems = m_children.GetCount();
 831     int nrows = m_rows;
 832     int ncols = m_cols;
 833
 834     if (ncols > 0)
 835         nrows = (nitems + ncols-1) / ncols;
 836     else
 837         ncols = (nitems + nrows-1) / nrows;
 838
 839     CreateArrays();
 840
 841     int col;
 842     int row;
 843
 844     int i = 0;
 845     wxNode *node = m_children.First();
 846     while (node)
 847     {
 848         wxSizerItem *item = (wxSizerItem*)node->Data();
 849         wxSize sz( item->CalcMin() );
 850         row = i / ncols;
 851         col = i % ncols;
 852         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
 853         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
 854
 855         node = node->Next();
 856         i++;
 857     }
 858
 859     int width = 0;
 860     for (col = 0; col < ncols; col++)
 861         width += m_colWidths[ col ];
 862
 863     int height = 0;
 864     for (row = 0; row < nrows; row++)
 865         height += m_rowHeights[ row ];
 866
 867     return wxSize( width +  (ncols-1) * m_hgap,
 868                    height + (nrows-1) * m_vgap);
 869 }
 870
 871 void wxFlexGridSizer::AddGrowableRow( size_t idx )
 872 {
 873     m_growableRows.Add( idx );
 874 }
 875
 876 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
 877 {
 878 }
 879
 880 void wxFlexGridSizer::AddGrowableCol( size_t idx )
 881 {
 882     m_growableCols.Add( idx );
 883 }
 884
 885 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
 886 {
 887 }
 888
 889 //---------------------------------------------------------------------------
 890 // wxBoxSizer
 891 //---------------------------------------------------------------------------
 892
 893 wxBoxSizer::wxBoxSizer( int orient )
 894 {
 895     m_orient = orient;
 896 }
 897
 898 void wxBoxSizer::RecalcSizes()
 899 {
 900     if (m_children.GetCount() == 0)
 901         return;
 902
 903     int delta = 0;
 904     int extra = 0;
 905     if (m_stretchable)
 906     {
 907         if (m_orient == wxHORIZONTAL)
 908         {
 909             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 910             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 911         }
 912         else
 913         {
 914             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 915             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 916         }
 917     }
 918
 919     wxPoint pt( m_position );
 920
 921     wxNode *node = m_children.GetFirst();
 922     while (node)
 923     {
 924         wxSizerItem *item = (wxSizerItem*) node->Data();
 925
 926         int weight = 1;
 927         if (item->GetOption())
 928             weight = item->GetOption();
 929
 930         wxSize size( item->CalcMin() );
 931
 932         if (m_orient == wxVERTICAL)
 933         {
 934             wxCoord height = size.y;
 935             if (item->GetOption())
 936             {
 937                 height = (delta * weight) + extra;
 938                 extra = 0; // only the first item will get the remainder as extra size
 939             }
 940
 941             wxPoint child_pos( pt );
 942             wxSize  child_size( wxSize( size.x, height) );
 943
 944             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 945                 child_size.x = m_size.x;
 946             else if (item->GetFlag() & wxALIGN_RIGHT)
 947                 child_pos.x += m_size.x - size.x;
 948             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
 949             // XXX wxCENTER is added for backward compatibility;
 950             //     wxALIGN_CENTER should be used in new code
 951                 child_pos.x += (m_size.x - size.x) / 2;
 952
 953             item->SetDimension( child_pos, child_size );
 954
 955             pt.y += height;
 956         }
 957         else
 958         {
 959             wxCoord width = size.x;
 960             if (item->GetOption())
 961             {
 962                 width = (delta * weight) + extra;
 963                 extra = 0; // only the first item will get the remainder as extra size
 964             }
 965
 966             wxPoint child_pos( pt );
 967             wxSize  child_size( wxSize(width, size.y) );
 968
 969             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 970                 child_size.y = m_size.y;
 971             else if (item->GetFlag() & wxALIGN_BOTTOM)
 972                 child_pos.y += m_size.y - size.y;
 973             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
 974             // XXX wxCENTER is added for backward compatibility;
 975             //     wxALIGN_CENTER should be used in new code
 976                 child_pos.y += (m_size.y - size.y) / 2;
 977
 978             item->SetDimension( child_pos, child_size );
 979
 980             pt.x += width;
 981         }
 982
 983         node = node->Next();
 984     }
 985 }
 986
 987 wxSize wxBoxSizer::CalcMin()
 988 {
 989     if (m_children.GetCount() == 0)
 990         return wxSize(10,10);
 991
 992     m_stretchable = 0;
 993     m_minWidth = 0;
 994     m_minHeight = 0;
 995     m_fixedWidth = 0;
 996     m_fixedHeight = 0;
 997
 998     // Find how long each stretch unit needs to be
 999     int stretchSize = 1;
1000     wxNode *node = m_children.GetFirst();
1001     while (node)
1002     {
1003         wxSizerItem *item = (wxSizerItem*) node->Data();
1004         if (item->GetOption() != 0)
1005         {
1006             int stretch = item->GetOption();
1007             wxSize size( item->CalcMin() );
1008             int sizePerStretch;
1009             // Integer division rounded up is (a + b - 1) / b
1010             if (m_orient == wxHORIZONTAL)
1011                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1012             else
1013                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1014             if (sizePerStretch > stretchSize)
1015                 stretchSize = sizePerStretch;
1016         }
1017         node = node->Next();
1018     }
1019         // Calculate overall minimum size
1020         node = m_children.GetFirst();
1021     while (node)
1022     {
1023         wxSizerItem *item = (wxSizerItem*) node->Data();
1024
1025         m_stretchable += item->GetOption();
1026
1027         wxSize size( item->CalcMin() );
1028         if (item->GetOption() != 0)
1029         {
1030             if (m_orient == wxHORIZONTAL)
1031                 size.x = stretchSize * item->GetOption();
1032             else
1033                 size.y = stretchSize * item->GetOption();
1034         }
1035
1036         if (m_orient == wxHORIZONTAL)
1037         {
1038             m_minWidth += size.x;
1039             m_minHeight = wxMax( m_minHeight, size.y );
1040         }
1041         else
1042         {
1043             m_minHeight += size.y;
1044             m_minWidth = wxMax( m_minWidth, size.x );
1045         }
1046
1047         if (item->GetOption() == 0)
1048         {
1049             if (m_orient == wxVERTICAL)
1050             {
1051                 m_fixedHeight += size.y;
1052                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
1053             }
1054             else
1055             {
1056                 m_fixedWidth += size.x;
1057                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
1058             }
1059         }
1060
1061         node = node->Next();
1062     }
1063
1064     return wxSize( m_minWidth, m_minHeight );
1065 }
1066
1067 //---------------------------------------------------------------------------
1068 // wxStaticBoxSizer
1069 //---------------------------------------------------------------------------
1070
1071 #if wxUSE_STATBOX
1072
1073 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1074                 : wxBoxSizer( orient )
1075 {
1076     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1077
1078     m_staticBox = box;
1079 }
1080
1081 static void GetStaticBoxBorders(wxStaticBox *box,
1082                                 int *borderTop, int *borderOther)
1083 {
1084     // this has to be done platform by platform as there is no way to
1085     // guess the thickness of a wxStaticBox border
1086 #ifdef __WXGTK__
1087     if ( box->GetLabel().IsEmpty() )
1088         *borderTop = 5;
1089     else
1090 #endif // __WXGTK__
1091         *borderTop = 15;
1092         (void)box;
1093     *borderOther = 5;
1094 }
1095
1096 void wxStaticBoxSizer::RecalcSizes()
1097 {
1098     int top_border, other_border;
1099     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1100
1101     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1102
1103     wxPoint old_pos( m_position );
1104     m_position.x += other_border;
1105     m_position.y += top_border;
1106     wxSize old_size( m_size );
1107     m_size.x -= 2*other_border;
1108     m_size.y -= top_border + other_border;
1109
1110     wxBoxSizer::RecalcSizes();
1111
1112     m_position = old_pos;
1113     m_size = old_size;
1114 }
1115
1116 wxSize wxStaticBoxSizer::CalcMin()
1117 {
1118     int top_border, other_border;
1119     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1120
1121     wxSize ret( wxBoxSizer::CalcMin() );
1122     ret.x += 2*other_border;
1123     ret.y += other_border + top_border;
1124
1125     return ret;
1126 }
1127
1128 #endif // wxUSE_STATBOX
1129
1130 //---------------------------------------------------------------------------
1131 // wxNotebookSizer
1132 //---------------------------------------------------------------------------
1133
1134 #if wxUSE_NOTEBOOK
1135
1136 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1137 {
1138     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1139
1140     m_notebook = nb;
1141 }
1142
1143 void wxNotebookSizer::RecalcSizes()
1144 {
1145     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1146 }
1147
1148 wxSize wxNotebookSizer::CalcMin()
1149 {
1150     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1151
1152     sizeBorder.x += 5;
1153     sizeBorder.y += 5;
1154
1155     if (m_notebook->GetChildren().GetCount() == 0)
1156     {
1157         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1158     }
1159
1160     int maxX = 0;
1161     int maxY = 0;
1162
1163     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1164     while (node)
1165     {
1166         wxWindow *item = node->GetData();
1167         wxSizer *itemsizer = item->GetSizer();
1168
1169         if (itemsizer)
1170         {
1171             wxSize subsize( itemsizer->CalcMin() );
1172
1173             if (subsize.x > maxX)
1174                 maxX = subsize.x;
1175             if (subsize.y > maxY)
1176                 maxY = subsize.y;
1177         }
1178
1179         node = node->GetNext();
1180     }
1181
1182     return wxSize( maxX, maxY ) + sizeBorder;
1183 }
1184
1185 #endif // wxUSE_NOTEBOOK