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 bool wxSizerItem::IsWindow()
 236 {
 237     return (m_window != NULL);
 238 }
 239
 240 bool wxSizerItem::IsSizer()
 241 {
 242     return (m_sizer != NULL);
 243 }
 244
 245 bool wxSizerItem::IsSpacer()
 246 {
 247     return (m_window == NULL) && (m_sizer == NULL);
 248 }
 249
 250 //---------------------------------------------------------------------------
 251 // wxSizer
 252 //---------------------------------------------------------------------------
 253
 254 wxSizer::wxSizer()
 255 {
 256     m_children.DeleteContents( TRUE );
 257     m_minSize.x = 0;
 258     m_minSize.y = 0;
 259 }
 260
 261 wxSizer::~wxSizer()
 262 {
 263 }
 264
 265 void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
 266 {
 267     m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
 268 }
 269
 270 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 271 {
 272     m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
 273 }
 274
 275 void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
 276 {
 277     m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
 278 }
 279
 280 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
 281 {
 282     m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
 283 }
 284
 285 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 286 {
 287     m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
 288 }
 289
 290 void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
 291 {
 292     m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
 293 }
 294
 295 void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
 296 {
 297     m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
 298 }
 299
 300 void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 301 {
 302     m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
 303 }
 304
 305 void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
 306 {
 307     m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
 308 }
 309
 310 bool wxSizer::Remove( wxWindow *window )
 311 {
 312     wxASSERT( window );
 313
 314     wxNode *node = m_children.First();
 315     while (node)
 316     {
 317         wxSizerItem *item = (wxSizerItem*)node->Data();
 318         if (item->GetWindow() == window)
 319         {
 320             m_children.DeleteNode( node );
 321             return TRUE;
 322         }
 323         node = node->Next();
 324     }
 325
 326     return FALSE;
 327 }
 328
 329 bool wxSizer::Remove( wxSizer *sizer )
 330 {
 331     wxASSERT( sizer );
 332
 333     wxNode *node = m_children.First();
 334     while (node)
 335     {
 336         wxSizerItem *item = (wxSizerItem*)node->Data();
 337         if (item->GetSizer() == sizer)
 338         {
 339             m_children.DeleteNode( node );
 340             return TRUE;
 341         }
 342         node = node->Next();
 343     }
 344
 345     return FALSE;
 346 }
 347
 348 bool wxSizer::Remove( int pos )
 349 {
 350     wxNode *node = m_children.Nth( pos );
 351     if (!node) return FALSE;
 352
 353     m_children.DeleteNode( node );
 354
 355     return TRUE;
 356 }
 357
 358 void wxSizer::Fit( wxWindow *window )
 359 {
 360     wxSize size;
 361     if (window->IsTopLevel())
 362         size = FitSize( window );
 363     else
 364         size = GetMinWindowSize( window );
 365
 366     window->SetSize( size );
 367 }
 368
 369 void wxSizer::Layout()
 370 {
 371     CalcMin();
 372     RecalcSizes();
 373 }
 374
 375 void wxSizer::SetSizeHints( wxWindow *window )
 376 {
 377     wxSize size = FitSize( window );
 378     window->SetSizeHints( size.x, size.y );
 379 }
 380
 381 wxSize wxSizer::GetMaxWindowSize( wxWindow *WXUNUSED(window) )
 382 {
 383     wxRect rect = wxGetClientDisplayRect();
 384     wxSize sizeMax (rect.width,rect.height);
 385
 386     // Make the max size a bit smaller than the visible portion of
 387     // the screen.  A window which takes the entire screen doesn't
 388     // look very nice either
 389     sizeMax.x *= 9;
 390     sizeMax.x /= 10;
 391
 392     sizeMax.y *= 9;
 393     sizeMax.y /= 10;
 394
 395     return sizeMax;
 396 }
 397
 398 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 399 {
 400     wxSize minSize( GetMinSize() );
 401     wxSize size( window->GetSize() );
 402     wxSize client_size( window->GetClientSize() );
 403     return wxSize( minSize.x+size.x-client_size.x,
 404                    minSize.y+size.y-client_size.y );
 405 }
 406
 407 // Return a window size that will fit within the screens dimensions
 408 wxSize wxSizer::FitSize( wxWindow *window )
 409 {
 410     wxSize size     = GetMinWindowSize( window );
 411     wxSize sizeMax  = GetMaxWindowSize( window );
 412
 413     if ( size.x > sizeMax.x )
 414         size.x = sizeMax.x;
 415     if ( size.y > sizeMax.y )
 416         size.y = sizeMax.y;
 417
 418     return size;
 419 }
 420
 421 void wxSizer::SetDimension( int x, int y, int width, int height )
 422 {
 423     m_position.x = x;
 424     m_position.y = y;
 425     m_size.x = width;
 426     m_size.y = height;
 427     CalcMin();
 428     RecalcSizes();
 429 }
 430
 431 wxSize wxSizer::GetMinSize()
 432 {
 433     wxSize ret( CalcMin() );
 434     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 435     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 436     return ret;
 437 }
 438
 439 void wxSizer::DoSetMinSize( int width, int height )
 440 {
 441     m_minSize.x = width;
 442     m_minSize.y = height;
 443 }
 444
 445 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 446 {
 447     wxASSERT( window );
 448
 449     wxNode *node = m_children.First();
 450     while (node)
 451     {
 452         wxSizerItem *item = (wxSizerItem*)node->Data();
 453         if (item->GetWindow() == window)
 454         {
 455             item->SetInitSize( width, height );
 456             return TRUE;
 457         }
 458         node = node->Next();
 459     }
 460
 461     node = m_children.First();
 462     while (node)
 463     {
 464         wxSizerItem *item = (wxSizerItem*)node->Data();
 465         if (item->GetSizer())
 466         {
 467             /* It's a sizer, so lets search recursively. */
 468             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 469             {
 470                 /* A child sizer found the requested windw, exit. */
 471                 return TRUE;
 472             }
 473         }
 474         node = node->Next();
 475     }
 476
 477     return FALSE;
 478 }
 479
 480 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 481 {
 482     wxASSERT( sizer );
 483
 484     wxNode *node = m_children.First();
 485     while (node)
 486     {
 487         wxSizerItem *item = (wxSizerItem*)node->Data();
 488         if (item->GetSizer() == sizer)
 489         {
 490             item->GetSizer()->DoSetMinSize( width, height );
 491             return TRUE;
 492         }
 493         node = node->Next();
 494     }
 495
 496     node = m_children.First();
 497     while (node)
 498     {
 499         wxSizerItem *item = (wxSizerItem*)node->Data();
 500         if (item->GetSizer())
 501         {
 502             /* It's a sizer, so lets search recursively. */
 503             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 504             {
 505                 /* A child sizer found the requested windw, exit. */
 506                 return TRUE;
 507             }
 508         }
 509         node = node->Next();
 510     }
 511
 512     return FALSE;
 513 }
 514
 515 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 516 {
 517     wxNode *node = m_children.Nth( pos );
 518     if (!node) return FALSE;
 519
 520     wxSizerItem *item = (wxSizerItem*) node->Data();
 521     if (item->GetSizer())
 522     {
 523         /* Sizers contains the minimal size in them, if not calculated ... */
 524         item->GetSizer()->DoSetMinSize( width, height );
 525     }
 526     else
 527     {
 528         /* ... whereas the minimal size of spacers and windows in stored
 529            in the item */
 530         item->SetInitSize( width, height );
 531     }
 532
 533     return TRUE;
 534 }
 535
 536 //---------------------------------------------------------------------------
 537 // wxGridSizer
 538 //---------------------------------------------------------------------------
 539
 540 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 541 {
 542     m_rows = rows;
 543     m_cols = cols;
 544     m_vgap = vgap;
 545     m_hgap = hgap;
 546 }
 547
 548 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 549 {
 550     m_rows = 0;
 551     m_cols = cols;
 552     m_vgap = vgap;
 553     m_hgap = hgap;
 554 }
 555
 556 void wxGridSizer::RecalcSizes()
 557 {
 558     if (m_children.GetCount() == 0)
 559         return;
 560
 561     int nitems = m_children.GetCount();
 562     int nrows = m_rows;
 563     int ncols = m_cols;
 564
 565     if (ncols > 0)
 566         nrows = (nitems + ncols-1) / ncols;
 567     else
 568         ncols = (nitems + nrows-1) / nrows;
 569
 570     wxSize sz( GetSize() );
 571     wxPoint pt( GetPosition() );
 572
 573     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 574     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 575
 576     int x = pt.x;
 577     for (int c = 0; c < ncols; c++)
 578     {
 579         int y = pt.y;
 580         for (int r = 0; r < nrows; r++)
 581         {
 582             int i = r * ncols + c;
 583             if (i < nitems)
 584             {
 585                 wxNode *node = m_children.Nth( i );
 586                 wxASSERT( node );
 587
 588                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 589             }
 590             y = y + h + m_vgap;
 591         }
 592         x = x + w + m_hgap;
 593     }
 594 }
 595
 596 wxSize wxGridSizer::CalcMin()
 597 {
 598     if (m_children.GetCount() == 0)
 599         return wxSize(10,10);
 600
 601     int nitems = m_children.GetCount();
 602     int nrows = m_rows;
 603     int ncols = m_cols;
 604
 605     if (ncols > 0)
 606         nrows = (nitems + ncols-1) / ncols;
 607     else
 608         ncols = (nitems + nrows-1) / nrows;
 609
 610     /* Find the max width and height for any component */
 611     int w = 0;
 612     int h = 0;
 613
 614     wxNode *node = m_children.First();
 615     while (node)
 616     {
 617         wxSizerItem *item = (wxSizerItem*)node->Data();
 618         wxSize sz( item->CalcMin() );
 619         w = wxMax( w, sz.x );
 620         h = wxMax( h, sz.y );
 621
 622         node = node->Next();
 623     }
 624
 625     return wxSize(ncols * w + (ncols-1) * m_hgap,
 626                   nrows * h + (nrows-1) * m_vgap);
 627 }
 628
 629 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 630 {
 631     wxPoint pt( x,y );
 632     wxSize sz( item->CalcMin() );
 633     int flag = item->GetFlag();
 634
 635     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 636     {
 637        sz = wxSize(w, h);
 638     }
 639     else
 640     {
 641         if (flag & wxALIGN_CENTER_HORIZONTAL)
 642         {
 643             pt.x = x + (w - sz.x) / 2;
 644         }
 645         else if (flag & wxALIGN_RIGHT)
 646         {
 647             pt.x = x + (w - sz.x);
 648         }
 649
 650         if (flag & wxALIGN_CENTER_VERTICAL)
 651         {
 652             pt.y = y + (h - sz.y) / 2;
 653         }
 654         else if (flag & wxALIGN_BOTTOM)
 655         {
 656             pt.y = y + (h - sz.y);
 657         }
 658     }
 659
 660     item->SetDimension(pt, sz);
 661 }
 662
 663 //---------------------------------------------------------------------------
 664 // wxFlexGridSizer
 665 //---------------------------------------------------------------------------
 666
 667 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 668    : wxGridSizer( rows, cols, vgap, hgap )
 669 {
 670     m_rowHeights = (int*) NULL;
 671     m_colWidths = (int*) NULL;
 672 }
 673
 674 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 675    : wxGridSizer( cols, vgap, hgap )
 676 {
 677     m_rowHeights = (int*) NULL;
 678     m_colWidths = (int*) NULL;
 679 }
 680
 681 wxFlexGridSizer::~wxFlexGridSizer()
 682 {
 683     if (m_rowHeights)
 684         delete[] m_rowHeights;
 685     if (m_colWidths)
 686         delete[] m_colWidths;
 687 }
 688
 689 void wxFlexGridSizer::CreateArrays()
 690 {
 691     if (m_rowHeights)
 692         delete[] m_rowHeights;
 693     if (m_colWidths)
 694         delete[] m_colWidths;
 695
 696     if (m_children.GetCount() == 0)
 697         return;
 698
 699     int nitems = m_children.GetCount();
 700     int nrows = m_rows;
 701     int ncols = m_cols;
 702
 703     if (ncols > 0)
 704         nrows = (nitems + ncols-1) / ncols;
 705     else
 706         ncols = (nitems + nrows-1) / nrows;
 707
 708     m_rowHeights = new int[nrows];
 709     m_colWidths = new int[ncols];
 710
 711     for (int col = 0; col < ncols; col++)
 712         m_colWidths[ col ] = 0;
 713     for (int row = 0; row < nrows; row++)
 714         m_rowHeights[ row ] = 0;
 715 }
 716
 717 void wxFlexGridSizer::RecalcSizes()
 718 {
 719     if (m_children.GetCount() == 0)
 720         return;
 721
 722     int nitems = m_children.GetCount();
 723     int nrows = m_rows;
 724     int ncols = m_cols;
 725
 726     if (ncols > 0)
 727         nrows = (nitems + ncols-1) / ncols;
 728     else
 729         ncols = (nitems + nrows-1) / nrows;
 730
 731     wxSize sz( GetSize() );
 732     wxSize minsz( CalcMin() );
 733     wxPoint pt( GetPosition() );
 734     int    delta;
 735     size_t idx;
 736
 737     if ((m_growableRows.GetCount() > 0) && (sz.y > minsz.y))
 738     {
 739         delta = (sz.y - minsz.y) / m_growableRows.GetCount();
 740         for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 741             m_rowHeights[ m_growableRows[idx] ] += delta;
 742     }
 743
 744     if ((m_growableCols.GetCount() > 0) && (sz.x > minsz.x))
 745     {
 746         delta = (sz.x - minsz.x) / m_growableCols.GetCount();
 747         for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 748             m_colWidths[ m_growableCols[idx] ] += delta;
 749     }
 750
 751     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 752
 753     int x = pt.x;
 754     for (int c = 0; c < ncols; c++)
 755     {
 756         int y = pt.y;
 757         for (int r = 0; r < nrows; r++)
 758         {
 759             int i = r * ncols + c;
 760             if (i < nitems)
 761             {
 762                 wxNode *node = m_children.Nth( i );
 763                 wxASSERT( node );
 764
 765                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 766                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 767
 768                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 769             }
 770             y = y + m_rowHeights[r] + m_vgap;
 771         }
 772         x = x + m_colWidths[c] + m_hgap;
 773     }
 774 }
 775
 776 wxSize wxFlexGridSizer::CalcMin()
 777 {
 778     if (m_children.GetCount() == 0)
 779         return wxSize(10,10);
 780
 781     int nitems = m_children.GetCount();
 782     int nrows = m_rows;
 783     int ncols = m_cols;
 784
 785     if (ncols > 0)
 786         nrows = (nitems + ncols-1) / ncols;
 787     else
 788         ncols = (nitems + nrows-1) / nrows;
 789
 790     CreateArrays();
 791
 792     int col;
 793     int row;
 794
 795     int i = 0;
 796     wxNode *node = m_children.First();
 797     while (node)
 798     {
 799         wxSizerItem *item = (wxSizerItem*)node->Data();
 800         wxSize sz( item->CalcMin() );
 801         row = i / ncols;
 802         col = i % ncols;
 803         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
 804         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
 805
 806         node = node->Next();
 807         i++;
 808     }
 809
 810     int width = 0;
 811     for (col = 0; col < ncols; col++)
 812         width += m_colWidths[ col ];
 813
 814     int height = 0;
 815     for (row = 0; row < nrows; row++)
 816         height += m_rowHeights[ row ];
 817
 818     return wxSize( width +  (ncols-1) * m_hgap,
 819                    height + (nrows-1) * m_vgap);
 820 }
 821
 822 void wxFlexGridSizer::AddGrowableRow( size_t idx )
 823 {
 824     m_growableRows.Add( idx );
 825 }
 826
 827 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
 828 {
 829 }
 830
 831 void wxFlexGridSizer::AddGrowableCol( size_t idx )
 832 {
 833     m_growableCols.Add( idx );
 834 }
 835
 836 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
 837 {
 838 }
 839
 840 //---------------------------------------------------------------------------
 841 // wxBoxSizer
 842 //---------------------------------------------------------------------------
 843
 844 wxBoxSizer::wxBoxSizer( int orient )
 845 {
 846     m_orient = orient;
 847 }
 848
 849 void wxBoxSizer::RecalcSizes()
 850 {
 851     if (m_children.GetCount() == 0)
 852         return;
 853
 854     int delta = 0;
 855     int extra = 0;
 856     if (m_stretchable)
 857     {
 858         if (m_orient == wxHORIZONTAL)
 859         {
 860             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 861             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 862         }
 863         else
 864         {
 865             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 866             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 867         }
 868     }
 869
 870     wxPoint pt( m_position );
 871
 872     wxNode *node = m_children.GetFirst();
 873     while (node)
 874     {
 875         wxSizerItem *item = (wxSizerItem*) node->Data();
 876
 877         int weight = 1;
 878         if (item->GetOption())
 879             weight = item->GetOption();
 880
 881         wxSize size( item->CalcMin() );
 882
 883         if (m_orient == wxVERTICAL)
 884         {
 885             wxCoord height = size.y;
 886             if (item->GetOption())
 887             {
 888                 height = (delta * weight) + extra;
 889                 extra = 0; // only the first item will get the remainder as extra size
 890             }
 891
 892             wxPoint child_pos( pt );
 893             wxSize  child_size( wxSize( size.x, height) );
 894
 895             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 896                 child_size.x = m_size.x;
 897             else if (item->GetFlag() & wxALIGN_RIGHT)
 898                 child_pos.x += m_size.x - size.x;
 899             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
 900             // XXX wxCENTER is added for backward compatibility;
 901             //     wxALIGN_CENTER should be used in new code
 902                 child_pos.x += (m_size.x - size.x) / 2;
 903
 904             item->SetDimension( child_pos, child_size );
 905
 906             pt.y += height;
 907         }
 908         else
 909         {
 910             wxCoord width = size.x;
 911             if (item->GetOption())
 912             {
 913                 width = (delta * weight) + extra;
 914                 extra = 0; // only the first item will get the remainder as extra size
 915             }
 916
 917             wxPoint child_pos( pt );
 918             wxSize  child_size( wxSize(width, size.y) );
 919
 920             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 921                 child_size.y = m_size.y;
 922             else if (item->GetFlag() & wxALIGN_BOTTOM)
 923                 child_pos.y += m_size.y - size.y;
 924             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
 925             // XXX wxCENTER is added for backward compatibility;
 926             //     wxALIGN_CENTER should be used in new code
 927                 child_pos.y += (m_size.y - size.y) / 2;
 928
 929             item->SetDimension( child_pos, child_size );
 930
 931             pt.x += width;
 932         }
 933
 934         node = node->Next();
 935     }
 936 }
 937
 938 wxSize wxBoxSizer::CalcMin()
 939 {
 940     if (m_children.GetCount() == 0)
 941         return wxSize(10,10);
 942
 943     m_stretchable = 0;
 944     m_minWidth = 0;
 945     m_minHeight = 0;
 946     m_fixedWidth = 0;
 947     m_fixedHeight = 0;
 948
 949     // Find how long each stretch unit needs to be
 950     int stretchSize = 1;
 951     wxNode *node = m_children.GetFirst();
 952     while (node)
 953     {
 954         wxSizerItem *item = (wxSizerItem*) node->Data();
 955         if (item->GetOption() != 0)
 956         {
 957             int stretch = item->GetOption();
 958             wxSize size( item->CalcMin() );
 959             int sizePerStretch;
 960             // Integer division rounded up is (a + b - 1) / b
 961             if (m_orient == wxHORIZONTAL)
 962                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
 963             else
 964                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
 965             if (sizePerStretch > stretchSize)
 966                 stretchSize = sizePerStretch;
 967         }
 968         node = node->Next();
 969     }
 970         // Calculate overall minimum size
 971         node = m_children.GetFirst();
 972     while (node)
 973     {
 974         wxSizerItem *item = (wxSizerItem*) node->Data();
 975
 976         m_stretchable += item->GetOption();
 977
 978         wxSize size( item->CalcMin() );
 979         if (item->GetOption() != 0)
 980         {
 981             if (m_orient == wxHORIZONTAL)
 982                 size.x = stretchSize * item->GetOption();
 983             else
 984                 size.y = stretchSize * item->GetOption();
 985         }
 986
 987         if (m_orient == wxHORIZONTAL)
 988         {
 989             m_minWidth += size.x;
 990             m_minHeight = wxMax( m_minHeight, size.y );
 991         }
 992         else
 993         {
 994             m_minHeight += size.y;
 995             m_minWidth = wxMax( m_minWidth, size.x );
 996         }
 997
 998         if (item->GetOption() == 0)
 999         {
1000             if (m_orient == wxVERTICAL)
1001             {
1002                 m_fixedHeight += size.y;
1003                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
1004             }
1005             else
1006             {
1007                 m_fixedWidth += size.x;
1008                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
1009             }
1010         }
1011
1012         node = node->Next();
1013     }
1014
1015     return wxSize( m_minWidth, m_minHeight );
1016 }
1017
1018 //---------------------------------------------------------------------------
1019 // wxStaticBoxSizer
1020 //---------------------------------------------------------------------------
1021
1022 #if wxUSE_STATBOX
1023
1024 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1025                 : wxBoxSizer( orient )
1026 {
1027     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1028
1029     m_staticBox = box;
1030 }
1031
1032 static void GetStaticBoxBorders(wxStaticBox *box,
1033                                 int *borderTop, int *borderOther)
1034 {
1035     // this has to be done platform by platform as there is no way to
1036     // guess the thickness of a wxStaticBox border
1037 #ifdef __WXGTK__
1038     if ( box->GetLabel().IsEmpty() )
1039         *borderTop = 5;
1040     else
1041 #endif // __WXGTK__
1042         *borderTop = 15;
1043         (void)box;
1044     *borderOther = 5;
1045 }
1046
1047 void wxStaticBoxSizer::RecalcSizes()
1048 {
1049     int top_border, other_border;
1050     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1051
1052     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1053
1054     wxPoint old_pos( m_position );
1055     m_position.x += other_border;
1056     m_position.y += top_border;
1057     wxSize old_size( m_size );
1058     m_size.x -= 2*other_border;
1059     m_size.y -= top_border + other_border;
1060
1061     wxBoxSizer::RecalcSizes();
1062
1063     m_position = old_pos;
1064     m_size = old_size;
1065 }
1066
1067 wxSize wxStaticBoxSizer::CalcMin()
1068 {
1069     int top_border, other_border;
1070     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1071
1072     wxSize ret( wxBoxSizer::CalcMin() );
1073     ret.x += 2*other_border;
1074     ret.y += other_border + top_border;
1075
1076     return ret;
1077 }
1078
1079 #endif // wxUSE_STATBOX
1080
1081 //---------------------------------------------------------------------------
1082 // wxNotebookSizer
1083 //---------------------------------------------------------------------------
1084
1085 #if wxUSE_NOTEBOOK
1086
1087 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1088 {
1089     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1090
1091     m_notebook = nb;
1092 }
1093
1094 void wxNotebookSizer::RecalcSizes()
1095 {
1096     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1097 }
1098
1099 wxSize wxNotebookSizer::CalcMin()
1100 {
1101     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1102
1103     sizeBorder.x += 5;
1104     sizeBorder.y += 5;
1105
1106     if (m_notebook->GetChildren().GetCount() == 0)
1107     {
1108         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1109     }
1110
1111     int maxX = 0;
1112     int maxY = 0;
1113
1114     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1115     while (node)
1116     {
1117         wxWindow *item = node->GetData();
1118         wxSizer *itemsizer = item->GetSizer();
1119
1120         if (itemsizer)
1121         {
1122             wxSize subsize( itemsizer->CalcMin() );
1123
1124             if (subsize.x > maxX)
1125                 maxX = subsize.x;
1126             if (subsize.y > maxY)
1127                 maxY = subsize.y;
1128         }
1129
1130         node = node->GetNext();
1131     }
1132
1133     return wxSize( maxX, maxY ) + sizeBorder;
1134 }
1135
1136 #endif // wxUSE_NOTEBOOK