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 }
 273
 274 void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
 275 {
 276     m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
 277 }
 278
 279 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 280 {
 281     m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
 282 }
 283
 284 void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
 285 {
 286     m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
 287 }
 288
 289 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
 290 {
 291     m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
 292 }
 293
 294 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 295 {
 296     m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
 297 }
 298
 299 void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
 300 {
 301     m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
 302 }
 303
 304 void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
 305 {
 306     m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
 307 }
 308
 309 void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 310 {
 311     m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
 312 }
 313
 314 void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
 315 {
 316     m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
 317 }
 318
 319 bool wxSizer::Remove( wxWindow *window )
 320 {
 321     wxASSERT( window );
 322
 323     wxNode *node = m_children.First();
 324     while (node)
 325     {
 326         wxSizerItem *item = (wxSizerItem*)node->Data();
 327         if (item->GetWindow() == window)
 328         {
 329             m_children.DeleteNode( node );
 330             return TRUE;
 331         }
 332         node = node->Next();
 333     }
 334
 335     return FALSE;
 336 }
 337
 338 bool wxSizer::Remove( wxSizer *sizer )
 339 {
 340     wxASSERT( sizer );
 341
 342     wxNode *node = m_children.First();
 343     while (node)
 344     {
 345         wxSizerItem *item = (wxSizerItem*)node->Data();
 346         if (item->GetSizer() == sizer)
 347         {
 348             m_children.DeleteNode( node );
 349             return TRUE;
 350         }
 351         node = node->Next();
 352     }
 353
 354     return FALSE;
 355 }
 356
 357 bool wxSizer::Remove( int pos )
 358 {
 359     wxNode *node = m_children.Nth( pos );
 360     if (!node) return FALSE;
 361
 362     m_children.DeleteNode( node );
 363
 364     return TRUE;
 365 }
 366
 367 void wxSizer::Clear( bool delete_windows )
 368 {
 369     if (delete_windows)
 370         DeleteWindows();
 371
 372     m_children.Clear();
 373 }
 374
 375 void wxSizer::DeleteWindows()
 376 {
 377     wxNode *node = m_children.First();
 378     while (node)
 379     {
 380         wxSizerItem *item = (wxSizerItem*)node->Data();
 381         item->DeleteWindows();
 382         node = node->Next();
 383     }
 384 }
 385
 386 void wxSizer::Fit( wxWindow *window )
 387 {
 388     wxSize size;
 389     if (window->IsTopLevel())
 390         size = FitSize( window );
 391     else
 392         size = GetMinWindowSize( window );
 393
 394     window->SetSize( size );
 395 }
 396
 397 void wxSizer::Layout()
 398 {
 399     CalcMin();
 400     RecalcSizes();
 401 }
 402
 403 void wxSizer::SetSizeHints( wxWindow *window )
 404 {
 405     wxSize size = FitSize( window );
 406     window->SetSizeHints( size.x, size.y );
 407 }
 408
 409 wxSize wxSizer::GetMaxWindowSize( wxWindow *WXUNUSED(window) )
 410 {
 411     wxRect rect = wxGetClientDisplayRect();
 412     wxSize sizeMax (rect.width,rect.height);
 413
 414     // Sorry, but this bit is wrong -- it makes a window that should just be
 415     // able to fit onto the screen, not fit on the screen. -- JACS
 416 #if 0
 417     // Make the max size a bit smaller than the visible portion of
 418     // the screen.  A window which takes the entire screen doesn't
 419     // look very nice either
 420     sizeMax.x *= 9;
 421     sizeMax.x /= 10;
 422
 423     sizeMax.y *= 9;
 424     sizeMax.y /= 10;
 425 #endif
 426
 427     return sizeMax;
 428 }
 429
 430 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 431 {
 432     wxSize minSize( GetMinSize() );
 433     wxSize size( window->GetSize() );
 434     wxSize client_size( window->GetClientSize() );
 435     return wxSize( minSize.x+size.x-client_size.x,
 436                    minSize.y+size.y-client_size.y );
 437 }
 438
 439 // Return a window size that will fit within the screens dimensions
 440 wxSize wxSizer::FitSize( wxWindow *window )
 441 {
 442     wxSize size     = GetMinWindowSize( window );
 443     wxSize sizeMax  = GetMaxWindowSize( window );
 444
 445     if ( size.x > sizeMax.x )
 446         size.x = sizeMax.x;
 447     if ( size.y > sizeMax.y )
 448         size.y = sizeMax.y;
 449
 450     return size;
 451 }
 452
 453 void wxSizer::SetDimension( int x, int y, int width, int height )
 454 {
 455     m_position.x = x;
 456     m_position.y = y;
 457     m_size.x = width;
 458     m_size.y = height;
 459     CalcMin();
 460     RecalcSizes();
 461 }
 462
 463 wxSize wxSizer::GetMinSize()
 464 {
 465     wxSize ret( CalcMin() );
 466     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 467     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 468     return ret;
 469 }
 470
 471 void wxSizer::DoSetMinSize( int width, int height )
 472 {
 473     m_minSize.x = width;
 474     m_minSize.y = height;
 475 }
 476
 477 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 478 {
 479     wxASSERT( window );
 480
 481     wxNode *node = m_children.First();
 482     while (node)
 483     {
 484         wxSizerItem *item = (wxSizerItem*)node->Data();
 485         if (item->GetWindow() == window)
 486         {
 487             item->SetInitSize( width, height );
 488             return TRUE;
 489         }
 490         node = node->Next();
 491     }
 492
 493     node = m_children.First();
 494     while (node)
 495     {
 496         wxSizerItem *item = (wxSizerItem*)node->Data();
 497         if (item->GetSizer())
 498         {
 499             /* It's a sizer, so lets search recursively. */
 500             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 501             {
 502                 /* A child sizer found the requested windw, exit. */
 503                 return TRUE;
 504             }
 505         }
 506         node = node->Next();
 507     }
 508
 509     return FALSE;
 510 }
 511
 512 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 513 {
 514     wxASSERT( sizer );
 515
 516     wxNode *node = m_children.First();
 517     while (node)
 518     {
 519         wxSizerItem *item = (wxSizerItem*)node->Data();
 520         if (item->GetSizer() == sizer)
 521         {
 522             item->GetSizer()->DoSetMinSize( width, height );
 523             return TRUE;
 524         }
 525         node = node->Next();
 526     }
 527
 528     node = m_children.First();
 529     while (node)
 530     {
 531         wxSizerItem *item = (wxSizerItem*)node->Data();
 532         if (item->GetSizer())
 533         {
 534             /* It's a sizer, so lets search recursively. */
 535             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 536             {
 537                 /* A child sizer found the requested windw, exit. */
 538                 return TRUE;
 539             }
 540         }
 541         node = node->Next();
 542     }
 543
 544     return FALSE;
 545 }
 546
 547 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 548 {
 549     wxNode *node = m_children.Nth( pos );
 550     if (!node) return FALSE;
 551
 552     wxSizerItem *item = (wxSizerItem*) node->Data();
 553     if (item->GetSizer())
 554     {
 555         /* Sizers contains the minimal size in them, if not calculated ... */
 556         item->GetSizer()->DoSetMinSize( width, height );
 557     }
 558     else
 559     {
 560         /* ... whereas the minimal size of spacers and windows in stored
 561            in the item */
 562         item->SetInitSize( width, height );
 563     }
 564
 565     return TRUE;
 566 }
 567
 568 //---------------------------------------------------------------------------
 569 // wxGridSizer
 570 //---------------------------------------------------------------------------
 571
 572 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 573 {
 574     m_rows = rows;
 575     m_cols = cols;
 576     m_vgap = vgap;
 577     m_hgap = hgap;
 578 }
 579
 580 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 581 {
 582     m_rows = 0;
 583     m_cols = cols;
 584     m_vgap = vgap;
 585     m_hgap = hgap;
 586 }
 587
 588 void wxGridSizer::RecalcSizes()
 589 {
 590     if (m_children.GetCount() == 0)
 591         return;
 592
 593     int nitems = m_children.GetCount();
 594     int nrows = m_rows;
 595     int ncols = m_cols;
 596
 597     if (ncols > 0)
 598         nrows = (nitems + ncols-1) / ncols;
 599     else
 600         ncols = (nitems + nrows-1) / nrows;
 601
 602     wxSize sz( GetSize() );
 603     wxPoint pt( GetPosition() );
 604
 605     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 606     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 607
 608     int x = pt.x;
 609     for (int c = 0; c < ncols; c++)
 610     {
 611         int y = pt.y;
 612         for (int r = 0; r < nrows; r++)
 613         {
 614             int i = r * ncols + c;
 615             if (i < nitems)
 616             {
 617                 wxNode *node = m_children.Nth( i );
 618                 wxASSERT( node );
 619
 620                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 621             }
 622             y = y + h + m_vgap;
 623         }
 624         x = x + w + m_hgap;
 625     }
 626 }
 627
 628 wxSize wxGridSizer::CalcMin()
 629 {
 630     if (m_children.GetCount() == 0)
 631         return wxSize(10,10);
 632
 633     int nitems = m_children.GetCount();
 634     int nrows = m_rows;
 635     int ncols = m_cols;
 636
 637     if (ncols > 0)
 638         nrows = (nitems + ncols-1) / ncols;
 639     else
 640         ncols = (nitems + nrows-1) / nrows;
 641
 642     /* Find the max width and height for any component */
 643     int w = 0;
 644     int h = 0;
 645
 646     wxNode *node = m_children.First();
 647     while (node)
 648     {
 649         wxSizerItem *item = (wxSizerItem*)node->Data();
 650         wxSize sz( item->CalcMin() );
 651         w = wxMax( w, sz.x );
 652         h = wxMax( h, sz.y );
 653
 654         node = node->Next();
 655     }
 656
 657     return wxSize(ncols * w + (ncols-1) * m_hgap,
 658                   nrows * h + (nrows-1) * m_vgap);
 659 }
 660
 661 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 662 {
 663     wxPoint pt( x,y );
 664     wxSize sz( item->CalcMin() );
 665     int flag = item->GetFlag();
 666
 667     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 668     {
 669        sz = wxSize(w, h);
 670     }
 671     else
 672     {
 673         if (flag & wxALIGN_CENTER_HORIZONTAL)
 674         {
 675             pt.x = x + (w - sz.x) / 2;
 676         }
 677         else if (flag & wxALIGN_RIGHT)
 678         {
 679             pt.x = x + (w - sz.x);
 680         }
 681
 682         if (flag & wxALIGN_CENTER_VERTICAL)
 683         {
 684             pt.y = y + (h - sz.y) / 2;
 685         }
 686         else if (flag & wxALIGN_BOTTOM)
 687         {
 688             pt.y = y + (h - sz.y);
 689         }
 690     }
 691
 692     item->SetDimension(pt, sz);
 693 }
 694
 695 //---------------------------------------------------------------------------
 696 // wxFlexGridSizer
 697 //---------------------------------------------------------------------------
 698
 699 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 700    : wxGridSizer( rows, cols, vgap, hgap )
 701 {
 702     m_rowHeights = (int*) NULL;
 703     m_colWidths = (int*) NULL;
 704 }
 705
 706 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 707    : wxGridSizer( cols, vgap, hgap )
 708 {
 709     m_rowHeights = (int*) NULL;
 710     m_colWidths = (int*) NULL;
 711 }
 712
 713 wxFlexGridSizer::~wxFlexGridSizer()
 714 {
 715     if (m_rowHeights)
 716         delete[] m_rowHeights;
 717     if (m_colWidths)
 718         delete[] m_colWidths;
 719 }
 720
 721 void wxFlexGridSizer::CreateArrays()
 722 {
 723     if (m_rowHeights)
 724         delete[] m_rowHeights;
 725     if (m_colWidths)
 726         delete[] m_colWidths;
 727
 728     if (m_children.GetCount() == 0)
 729         return;
 730
 731     int nitems = m_children.GetCount();
 732     int nrows = m_rows;
 733     int ncols = m_cols;
 734
 735     if (ncols > 0)
 736         nrows = (nitems + ncols-1) / ncols;
 737     else
 738         ncols = (nitems + nrows-1) / nrows;
 739
 740     m_rowHeights = new int[nrows];
 741     m_colWidths = new int[ncols];
 742
 743     for (int col = 0; col < ncols; col++)
 744         m_colWidths[ col ] = 0;
 745     for (int row = 0; row < nrows; row++)
 746         m_rowHeights[ row ] = 0;
 747 }
 748
 749 void wxFlexGridSizer::RecalcSizes()
 750 {
 751     if (m_children.GetCount() == 0)
 752         return;
 753
 754     int nitems = m_children.GetCount();
 755     int nrows = m_rows;
 756     int ncols = m_cols;
 757
 758     if (ncols > 0)
 759         nrows = (nitems + ncols-1) / ncols;
 760     else
 761         ncols = (nitems + nrows-1) / nrows;
 762
 763     wxSize sz( GetSize() );
 764     wxSize minsz( CalcMin() );
 765     wxPoint pt( GetPosition() );
 766     int    delta;
 767     size_t idx;
 768
 769     if ((m_growableRows.GetCount() > 0) && (sz.y > minsz.y))
 770     {
 771         delta = (sz.y - minsz.y) / m_growableRows.GetCount();
 772         for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 773             m_rowHeights[ m_growableRows[idx] ] += delta;
 774     }
 775
 776     if ((m_growableCols.GetCount() > 0) && (sz.x > minsz.x))
 777     {
 778         delta = (sz.x - minsz.x) / m_growableCols.GetCount();
 779         for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 780             m_colWidths[ m_growableCols[idx] ] += delta;
 781     }
 782
 783     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 784
 785     int x = pt.x;
 786     for (int c = 0; c < ncols; c++)
 787     {
 788         int y = pt.y;
 789         for (int r = 0; r < nrows; r++)
 790         {
 791             int i = r * ncols + c;
 792             if (i < nitems)
 793             {
 794                 wxNode *node = m_children.Nth( i );
 795                 wxASSERT( node );
 796
 797                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 798                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 799
 800                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 801             }
 802             y = y + m_rowHeights[r] + m_vgap;
 803         }
 804         x = x + m_colWidths[c] + m_hgap;
 805     }
 806 }
 807
 808 wxSize wxFlexGridSizer::CalcMin()
 809 {
 810     if (m_children.GetCount() == 0)
 811         return wxSize(10,10);
 812
 813     int nitems = m_children.GetCount();
 814     int nrows = m_rows;
 815     int ncols = m_cols;
 816
 817     if (ncols > 0)
 818         nrows = (nitems + ncols-1) / ncols;
 819     else
 820         ncols = (nitems + nrows-1) / nrows;
 821
 822     CreateArrays();
 823
 824     int col;
 825     int row;
 826
 827     int i = 0;
 828     wxNode *node = m_children.First();
 829     while (node)
 830     {
 831         wxSizerItem *item = (wxSizerItem*)node->Data();
 832         wxSize sz( item->CalcMin() );
 833         row = i / ncols;
 834         col = i % ncols;
 835         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
 836         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
 837
 838         node = node->Next();
 839         i++;
 840     }
 841
 842     int width = 0;
 843     for (col = 0; col < ncols; col++)
 844         width += m_colWidths[ col ];
 845
 846     int height = 0;
 847     for (row = 0; row < nrows; row++)
 848         height += m_rowHeights[ row ];
 849
 850     return wxSize( width +  (ncols-1) * m_hgap,
 851                    height + (nrows-1) * m_vgap);
 852 }
 853
 854 void wxFlexGridSizer::AddGrowableRow( size_t idx )
 855 {
 856     m_growableRows.Add( idx );
 857 }
 858
 859 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
 860 {
 861 }
 862
 863 void wxFlexGridSizer::AddGrowableCol( size_t idx )
 864 {
 865     m_growableCols.Add( idx );
 866 }
 867
 868 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
 869 {
 870 }
 871
 872 //---------------------------------------------------------------------------
 873 // wxBoxSizer
 874 //---------------------------------------------------------------------------
 875
 876 wxBoxSizer::wxBoxSizer( int orient )
 877 {
 878     m_orient = orient;
 879 }
 880
 881 void wxBoxSizer::RecalcSizes()
 882 {
 883     if (m_children.GetCount() == 0)
 884         return;
 885
 886     int delta = 0;
 887     int extra = 0;
 888     if (m_stretchable)
 889     {
 890         if (m_orient == wxHORIZONTAL)
 891         {
 892             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 893             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 894         }
 895         else
 896         {
 897             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 898             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 899         }
 900     }
 901
 902     wxPoint pt( m_position );
 903
 904     wxNode *node = m_children.GetFirst();
 905     while (node)
 906     {
 907         wxSizerItem *item = (wxSizerItem*) node->Data();
 908
 909         int weight = 1;
 910         if (item->GetOption())
 911             weight = item->GetOption();
 912
 913         wxSize size( item->CalcMin() );
 914
 915         if (m_orient == wxVERTICAL)
 916         {
 917             wxCoord height = size.y;
 918             if (item->GetOption())
 919             {
 920                 height = (delta * weight) + extra;
 921                 extra = 0; // only the first item will get the remainder as extra size
 922             }
 923
 924             wxPoint child_pos( pt );
 925             wxSize  child_size( wxSize( size.x, height) );
 926
 927             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 928                 child_size.x = m_size.x;
 929             else if (item->GetFlag() & wxALIGN_RIGHT)
 930                 child_pos.x += m_size.x - size.x;
 931             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
 932             // XXX wxCENTER is added for backward compatibility;
 933             //     wxALIGN_CENTER should be used in new code
 934                 child_pos.x += (m_size.x - size.x) / 2;
 935
 936             item->SetDimension( child_pos, child_size );
 937
 938             pt.y += height;
 939         }
 940         else
 941         {
 942             wxCoord width = size.x;
 943             if (item->GetOption())
 944             {
 945                 width = (delta * weight) + extra;
 946                 extra = 0; // only the first item will get the remainder as extra size
 947             }
 948
 949             wxPoint child_pos( pt );
 950             wxSize  child_size( wxSize(width, size.y) );
 951
 952             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
 953                 child_size.y = m_size.y;
 954             else if (item->GetFlag() & wxALIGN_BOTTOM)
 955                 child_pos.y += m_size.y - size.y;
 956             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
 957             // XXX wxCENTER is added for backward compatibility;
 958             //     wxALIGN_CENTER should be used in new code
 959                 child_pos.y += (m_size.y - size.y) / 2;
 960
 961             item->SetDimension( child_pos, child_size );
 962
 963             pt.x += width;
 964         }
 965
 966         node = node->Next();
 967     }
 968 }
 969
 970 wxSize wxBoxSizer::CalcMin()
 971 {
 972     if (m_children.GetCount() == 0)
 973         return wxSize(10,10);
 974
 975     m_stretchable = 0;
 976     m_minWidth = 0;
 977     m_minHeight = 0;
 978     m_fixedWidth = 0;
 979     m_fixedHeight = 0;
 980
 981     // Find how long each stretch unit needs to be
 982     int stretchSize = 1;
 983     wxNode *node = m_children.GetFirst();
 984     while (node)
 985     {
 986         wxSizerItem *item = (wxSizerItem*) node->Data();
 987         if (item->GetOption() != 0)
 988         {
 989             int stretch = item->GetOption();
 990             wxSize size( item->CalcMin() );
 991             int sizePerStretch;
 992             // Integer division rounded up is (a + b - 1) / b
 993             if (m_orient == wxHORIZONTAL)
 994                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
 995             else
 996                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
 997             if (sizePerStretch > stretchSize)
 998                 stretchSize = sizePerStretch;
 999         }
1000         node = node->Next();
1001     }
1002         // Calculate overall minimum size
1003         node = m_children.GetFirst();
1004     while (node)
1005     {
1006         wxSizerItem *item = (wxSizerItem*) node->Data();
1007
1008         m_stretchable += item->GetOption();
1009
1010         wxSize size( item->CalcMin() );
1011         if (item->GetOption() != 0)
1012         {
1013             if (m_orient == wxHORIZONTAL)
1014                 size.x = stretchSize * item->GetOption();
1015             else
1016                 size.y = stretchSize * item->GetOption();
1017         }
1018
1019         if (m_orient == wxHORIZONTAL)
1020         {
1021             m_minWidth += size.x;
1022             m_minHeight = wxMax( m_minHeight, size.y );
1023         }
1024         else
1025         {
1026             m_minHeight += size.y;
1027             m_minWidth = wxMax( m_minWidth, size.x );
1028         }
1029
1030         if (item->GetOption() == 0)
1031         {
1032             if (m_orient == wxVERTICAL)
1033             {
1034                 m_fixedHeight += size.y;
1035                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
1036             }
1037             else
1038             {
1039                 m_fixedWidth += size.x;
1040                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
1041             }
1042         }
1043
1044         node = node->Next();
1045     }
1046
1047     return wxSize( m_minWidth, m_minHeight );
1048 }
1049
1050 //---------------------------------------------------------------------------
1051 // wxStaticBoxSizer
1052 //---------------------------------------------------------------------------
1053
1054 #if wxUSE_STATBOX
1055
1056 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1057                 : wxBoxSizer( orient )
1058 {
1059     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1060
1061     m_staticBox = box;
1062 }
1063
1064 static void GetStaticBoxBorders(wxStaticBox *box,
1065                                 int *borderTop, int *borderOther)
1066 {
1067     // this has to be done platform by platform as there is no way to
1068     // guess the thickness of a wxStaticBox border
1069 #ifdef __WXGTK__
1070     if ( box->GetLabel().IsEmpty() )
1071         *borderTop = 5;
1072     else
1073 #endif // __WXGTK__
1074         *borderTop = 15;
1075         (void)box;
1076     *borderOther = 5;
1077 }
1078
1079 void wxStaticBoxSizer::RecalcSizes()
1080 {
1081     int top_border, other_border;
1082     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1083
1084     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1085
1086     wxPoint old_pos( m_position );
1087     m_position.x += other_border;
1088     m_position.y += top_border;
1089     wxSize old_size( m_size );
1090     m_size.x -= 2*other_border;
1091     m_size.y -= top_border + other_border;
1092
1093     wxBoxSizer::RecalcSizes();
1094
1095     m_position = old_pos;
1096     m_size = old_size;
1097 }
1098
1099 wxSize wxStaticBoxSizer::CalcMin()
1100 {
1101     int top_border, other_border;
1102     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1103
1104     wxSize ret( wxBoxSizer::CalcMin() );
1105     ret.x += 2*other_border;
1106     ret.y += other_border + top_border;
1107
1108     return ret;
1109 }
1110
1111 #endif // wxUSE_STATBOX
1112
1113 //---------------------------------------------------------------------------
1114 // wxNotebookSizer
1115 //---------------------------------------------------------------------------
1116
1117 #if wxUSE_NOTEBOOK
1118
1119 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1120 {
1121     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1122
1123     m_notebook = nb;
1124 }
1125
1126 void wxNotebookSizer::RecalcSizes()
1127 {
1128     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1129 }
1130
1131 wxSize wxNotebookSizer::CalcMin()
1132 {
1133     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1134
1135     sizeBorder.x += 5;
1136     sizeBorder.y += 5;
1137
1138     if (m_notebook->GetChildren().GetCount() == 0)
1139     {
1140         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1141     }
1142
1143     int maxX = 0;
1144     int maxY = 0;
1145
1146     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1147     while (node)
1148     {
1149         wxWindow *item = node->GetData();
1150         wxSizer *itemsizer = item->GetSizer();
1151
1152         if (itemsizer)
1153         {
1154             wxSize subsize( itemsizer->CalcMin() );
1155
1156             if (subsize.x > maxX)
1157                 maxX = subsize.x;
1158             if (subsize.y > maxY)
1159                 maxY = subsize.y;
1160         }
1161
1162         node = node->GetNext();
1163     }
1164
1165     return wxSize( maxX, maxY ) + sizeBorder;
1166 }
1167
1168 #endif // wxUSE_NOTEBOOK