src/common/sizer.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        sizer.cpp
   3 // Purpose:     provide new wxSizer class for layout
   4 // Author:      Robert Roebling and Robin Dunn
   5 // Modified by: Ron Lee
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robin Dunn, Dirk Holtwick and Robert Roebling
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "sizer.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #include "wx/sizer.h"
  24 #include "wx/utils.h"
  25 #include "wx/statbox.h"
  26 #include "wx/notebook.h"
  27
  28 //---------------------------------------------------------------------------
  29
  30 IMPLEMENT_ABSTRACT_CLASS(wxSizerItem, wxObject)
  31 IMPLEMENT_ABSTRACT_CLASS(wxSizer, wxObject)
  32 IMPLEMENT_ABSTRACT_CLASS(wxGridSizer, wxSizer)
  33 IMPLEMENT_ABSTRACT_CLASS(wxFlexGridSizer, wxGridSizer)
  34 IMPLEMENT_ABSTRACT_CLASS(wxBoxSizer, wxSizer)
  35 #if wxUSE_STATBOX
  36 IMPLEMENT_ABSTRACT_CLASS(wxStaticBoxSizer, wxBoxSizer)
  37 #endif
  38 #if wxUSE_NOTEBOOK
  39 IMPLEMENT_ABSTRACT_CLASS(wxNotebookSizer, wxSizer)
  40 #endif
  41
  42 //---------------------------------------------------------------------------
  43 // wxSizerItem
  44 //---------------------------------------------------------------------------
  45
  46 wxSizerItem::wxSizerItem( int width, int height, int option, int flag, int border, wxObject* userData )
  47 {
  48     m_window = (wxWindow *) NULL;
  49     m_sizer = (wxSizer *) NULL;
  50     m_option = option;
  51     m_border = border;
  52     m_flag = flag;
  53     m_userData = userData;
  54
  55     // minimal size is the initial size
  56     m_minSize.x = width;
  57     m_minSize.y = height;
  58
  59     SetRatio(width, height);
  60
  61     // size is set directly
  62     m_size = m_minSize;
  63 }
  64
  65 wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border, wxObject* userData )
  66 {
  67     m_window = window;
  68     m_sizer = (wxSizer *) NULL;
  69     m_option = option;
  70     m_border = border;
  71     m_flag = flag;
  72     m_userData = userData;
  73
  74     // minimal size is the initial size
  75     m_minSize = window->GetSize();
  76
  77     // aspect ratio calculated from initial size
  78     SetRatio(m_minSize);
  79
  80     // size is calculated later
  81     // m_size = ...
  82 }
  83
  84 wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
  85 {
  86     m_window = (wxWindow *) NULL;
  87     m_sizer = sizer;
  88     m_option = option;
  89     m_border = border;
  90     m_flag = flag;
  91     m_userData = userData;
  92
  93     // minimal size is calculated later
  94     // m_minSize = ...
  95     m_ratio = 0;
  96
  97     // size is calculated later
  98     // m_size = ...
  99 }
 100
 101 wxSizerItem::~wxSizerItem()
 102 {
 103     if (m_userData)
 104         delete m_userData;
 105     if (m_sizer)
 106         delete m_sizer;
 107 }
 108
 109
 110 wxSize wxSizerItem::GetSize()
 111 {
 112     wxSize ret;
 113     if (IsSizer())
 114         ret = m_sizer->GetSize();
 115     else
 116     if (IsWindow())
 117         ret = m_window->GetSize();
 118     else ret = m_size;
 119
 120     if (m_flag & wxWEST)
 121         ret.x += m_border;
 122     if (m_flag & wxEAST)
 123         ret.x += m_border;
 124     if (m_flag & wxNORTH)
 125         ret.y += m_border;
 126     if (m_flag & wxSOUTH)
 127         ret.y += m_border;
 128
 129     return ret;
 130 }
 131
 132 wxSize wxSizerItem::CalcMin()
 133 {
 134     wxSize ret;
 135     if (IsSizer())
 136     {
 137         ret = m_sizer->GetMinSize();
 138
 139         // if we have to preserve aspect ratio _AND_ this is
 140         // the first-time calculation, consider ret to be initial size
 141         if ((m_flag & wxSHAPED) && !m_ratio)
 142             SetRatio(ret);
 143     }
 144     else
 145     {
 146         if ( IsWindow() && (m_flag & wxADJUST_MINSIZE) )
 147         {
 148             // check if the best (minimal, in fact) window size hadn't changed
 149             // by chance: this may happen for, e.g. static text if its label
 150             // changed
 151             wxSize size = m_window->GetBestSize();
 152             if ( size.x > m_minSize.x )
 153                 m_minSize.x = size.x;
 154             if ( size.y > m_minSize.y )
 155                 m_minSize.y = size.y;
 156         }
 157
 158         ret = m_minSize;
 159     }
 160
 161     if (m_flag & wxWEST)
 162         ret.x += m_border;
 163     if (m_flag & wxEAST)
 164         ret.x += m_border;
 165     if (m_flag & wxNORTH)
 166         ret.y += m_border;
 167     if (m_flag & wxSOUTH)
 168         ret.y += m_border;
 169
 170     return ret;
 171 }
 172
 173 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 174 {
 175     if (m_flag & wxSHAPED)
 176     {
 177         // adjust aspect ratio
 178         int rwidth = (int) (size.y * m_ratio);
 179         if (rwidth > size.x)
 180         {
 181             // fit horizontally
 182             int rheight = (int) (size.x / m_ratio);
 183             // add vertical space
 184             if (m_flag & wxALIGN_CENTER_VERTICAL)
 185                 pos.y += (size.y - rheight) / 2;
 186             else if (m_flag & wxALIGN_BOTTOM)
 187                 pos.y += (size.y - rheight);
 188             // use reduced dimensions
 189             size.y =rheight;
 190         }
 191         else if (rwidth < size.x)
 192         {
 193             // add horizontal space
 194             if (m_flag & wxALIGN_CENTER_HORIZONTAL)
 195                 pos.x += (size.x - rwidth) / 2;
 196             else if (m_flag & wxALIGN_RIGHT)
 197                 pos.x += (size.x - rwidth);
 198             size.x = rwidth;
 199         }
 200     }
 201
 202     // This is what GetPosition() returns. Since we calculate
 203     // borders afterwards, GetPosition() will be the left/top
 204     // corner of the surrounding border.
 205     m_pos = pos;
 206
 207     if (m_flag & wxWEST)
 208     {
 209         pos.x += m_border;
 210         size.x -= m_border;
 211     }
 212     if (m_flag & wxEAST)
 213     {
 214         size.x -= m_border;
 215     }
 216     if (m_flag & wxNORTH)
 217     {
 218         pos.y += m_border;
 219         size.y -= m_border;
 220     }
 221     if (m_flag & wxSOUTH)
 222     {
 223         size.y -= m_border;
 224     }
 225
 226     if (IsSizer())
 227         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 228
 229     if (IsWindow())
 230         m_window->SetSize( pos.x, pos.y, size.x, size.y, wxSIZE_ALLOW_MINUS_ONE );
 231
 232     m_size = size;
 233 }
 234
 235 void wxSizerItem::DeleteWindows()
 236 {
 237     if (m_window)
 238          m_window->Destroy();
 239
 240     if (m_sizer)
 241         m_sizer->DeleteWindows();
 242 }
 243
 244 bool wxSizerItem::IsWindow()
 245 {
 246     return (m_window != NULL);
 247 }
 248
 249 bool wxSizerItem::IsSizer()
 250 {
 251     return (m_sizer != NULL);
 252 }
 253
 254 bool wxSizerItem::IsSpacer()
 255 {
 256     return (m_window == NULL) && (m_sizer == NULL);
 257 }
 258
 259 //---------------------------------------------------------------------------
 260 // wxSizer
 261 //---------------------------------------------------------------------------
 262
 263 wxSizer::wxSizer()
 264 {
 265     m_children.DeleteContents( TRUE );
 266     m_minSize.x = 0;
 267     m_minSize.y = 0;
 268 }
 269
 270 wxSizer::~wxSizer()
 271 {
 272     Clear();
 273 }
 274
 275 void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
 276 {
 277     m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
 278     window->SetContainingSizer(this);
 279 }
 280
 281 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 282 {
 283     m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
 284 }
 285
 286 void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
 287 {
 288     m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
 289 }
 290
 291 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
 292 {
 293     m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
 294     window->SetContainingSizer(this);
 295 }
 296
 297 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 298 {
 299     m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
 300 }
 301
 302 void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
 303 {
 304     m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
 305 }
 306
 307 void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
 308 {
 309     m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
 310     window->SetContainingSizer(this);
 311 }
 312
 313 void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 314 {
 315     m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
 316 }
 317
 318 void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
 319 {
 320     m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
 321 }
 322
 323 bool wxSizer::Remove( wxWindow *window )
 324 {
 325     wxASSERT( window );
 326
 327     wxNode *node = m_children.First();
 328     while (node)
 329     {
 330         wxSizerItem *item = (wxSizerItem*)node->Data();
 331         if (item->GetWindow() == window)
 332         {
 333             item->GetWindow()->SetContainingSizer(NULL);
 334             m_children.DeleteNode( node );
 335             return TRUE;
 336         }
 337         node = node->Next();
 338     }
 339
 340     return FALSE;
 341 }
 342
 343 bool wxSizer::Remove( wxSizer *sizer )
 344 {
 345     wxASSERT( sizer );
 346
 347     wxNode *node = m_children.First();
 348     while (node)
 349     {
 350         wxSizerItem *item = (wxSizerItem*)node->Data();
 351         if (item->GetSizer() == sizer)
 352         {
 353             m_children.DeleteNode( node );
 354             return TRUE;
 355         }
 356         node = node->Next();
 357     }
 358
 359     return FALSE;
 360 }
 361
 362 bool wxSizer::Remove( int pos )
 363 {
 364     wxNode *node = m_children.Nth( pos );
 365     if (!node) return FALSE;
 366
 367     m_children.DeleteNode( node );
 368
 369     return TRUE;
 370 }
 371
 372 void wxSizer::Clear( bool delete_windows )
 373 {
 374     // First clear the ContainingSizer pointers
 375     wxNode *node = m_children.First();
 376     while (node)
 377     {
 378         wxSizerItem *item = (wxSizerItem*)node->Data();
 379         if (item->IsWindow())
 380             item->GetWindow()->SetContainingSizer(NULL);
 381         node = node->Next();
 382     }
 383
 384     // Destroy the windows if needed
 385     if (delete_windows)
 386         DeleteWindows();
 387
 388     // Now empty the list
 389     m_children.Clear();
 390 }
 391
 392 void wxSizer::DeleteWindows()
 393 {
 394     wxNode *node = m_children.First();
 395     while (node)
 396     {
 397         wxSizerItem *item = (wxSizerItem*)node->Data();
 398         item->DeleteWindows();
 399         node = node->Next();
 400     }
 401 }
 402
 403 wxSize wxSizer::Fit( wxWindow *window )
 404 {
 405     wxSize size;
 406     if (window->IsTopLevel())
 407         size = FitSize( window );
 408     else
 409         size = GetMinWindowSize( window );
 410
 411     window->SetSize( size );
 412
 413     return size;
 414 }
 415
 416 void wxSizer::FitInside( wxWindow *window )
 417 {
 418     wxSize size;
 419     if (window->IsTopLevel())
 420         size = VirtualFitSize( window );
 421     else
 422         size = GetMinClientSize( window );
 423
 424     window->SetVirtualSize( size );
 425 }
 426
 427 void wxSizer::Layout()
 428 {
 429     CalcMin();
 430     RecalcSizes();
 431 }
 432
 433 void wxSizer::SetSizeHints( wxWindow *window )
 434 {
 435     // Preserve the window's max size hints, but set the
 436     // lower bound according to the sizer calculations.
 437
 438     wxSize size = Fit( window );
 439
 440     window->SetSizeHints( size.x,
 441                           size.y,
 442                           window->GetMaxWidth(),
 443                           window->GetMaxHeight() );
 444 }
 445
 446 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 447 {
 448     // Preserve the window's max size hints, but set the
 449     // lower bound according to the sizer calculations.
 450
 451     FitInside( window );
 452     wxSize size( window->GetVirtualSize() );
 453     window->SetVirtualSizeHints( size.x,
 454                                  size.y,
 455                                  window->GetMaxWidth(),
 456                                  window->GetMaxHeight() );
 457 }
 458
 459 wxSize wxSizer::GetMaxWindowSize( wxWindow *window )
 460 {
 461     return window->GetMaxSize();
 462 }
 463
 464 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 465 {
 466     wxSize minSize( GetMinSize() );
 467     wxSize size( window->GetSize() );
 468     wxSize client_size( window->GetClientSize() );
 469     return wxSize( minSize.x+size.x-client_size.x,
 470                    minSize.y+size.y-client_size.y );
 471 }
 472
 473 // Return a window size that will fit within the screens dimensions
 474 wxSize wxSizer::FitSize( wxWindow *window )
 475 {
 476     wxSize size     = GetMinWindowSize( window );
 477     wxSize sizeMax  = GetMaxWindowSize( window );
 478
 479     // Limit the size if sizeMax != wxDefaultSize
 480
 481     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 482         size.x = sizeMax.x;
 483     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 484         size.y = sizeMax.y;
 485
 486     return size;
 487 }
 488
 489 wxSize wxSizer::GetMaxClientSize( wxWindow *window )
 490 {
 491     wxSize maxSize( window->GetMaxSize() );
 492
 493     if( maxSize != wxDefaultSize )
 494     {
 495         wxSize size( window->GetSize() );
 496         wxSize client_size( window->GetClientSize() );
 497
 498         return wxSize( maxSize.x + client_size.x - size.x,
 499                        maxSize.y + client_size.y - size.y );
 500     }
 501     else
 502         return wxDefaultSize;
 503 }
 504
 505 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
 506 {
 507     return GetMinSize();  // Already returns client size.
 508 }
 509
 510 wxSize wxSizer::VirtualFitSize( wxWindow *window )
 511 {
 512     wxSize size     = GetMinClientSize( window );
 513     wxSize sizeMax  = GetMaxClientSize( window );
 514
 515     // Limit the size if sizeMax != wxDefaultSize
 516
 517     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 518         size.x = sizeMax.x;
 519     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 520         size.y = sizeMax.y;
 521
 522     return size;
 523 }
 524
 525 void wxSizer::SetDimension( int x, int y, int width, int height )
 526 {
 527     m_position.x = x;
 528     m_position.y = y;
 529     m_size.x = width;
 530     m_size.y = height;
 531     CalcMin();
 532     RecalcSizes();
 533 }
 534
 535 wxSize wxSizer::GetMinSize()
 536 {
 537     wxSize ret( CalcMin() );
 538     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 539     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 540     return ret;
 541 }
 542
 543 void wxSizer::DoSetMinSize( int width, int height )
 544 {
 545     m_minSize.x = width;
 546     m_minSize.y = height;
 547 }
 548
 549 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 550 {
 551     wxASSERT( window );
 552
 553     wxNode *node = m_children.First();
 554     while (node)
 555     {
 556         wxSizerItem *item = (wxSizerItem*)node->Data();
 557         if (item->GetWindow() == window)
 558         {
 559             item->SetInitSize( width, height );
 560             return TRUE;
 561         }
 562         node = node->Next();
 563     }
 564
 565     node = m_children.First();
 566     while (node)
 567     {
 568         wxSizerItem *item = (wxSizerItem*)node->Data();
 569         if (item->GetSizer())
 570         {
 571             /* It's a sizer, so lets search recursively. */
 572             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 573             {
 574                 /* A child sizer found the requested windw, exit. */
 575                 return TRUE;
 576             }
 577         }
 578         node = node->Next();
 579     }
 580
 581     return FALSE;
 582 }
 583
 584 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 585 {
 586     wxASSERT( sizer );
 587
 588     wxNode *node = m_children.First();
 589     while (node)
 590     {
 591         wxSizerItem *item = (wxSizerItem*)node->Data();
 592         if (item->GetSizer() == sizer)
 593         {
 594             item->GetSizer()->DoSetMinSize( width, height );
 595             return TRUE;
 596         }
 597         node = node->Next();
 598     }
 599
 600     node = m_children.First();
 601     while (node)
 602     {
 603         wxSizerItem *item = (wxSizerItem*)node->Data();
 604         if (item->GetSizer())
 605         {
 606             /* It's a sizer, so lets search recursively. */
 607             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 608             {
 609                 /* A child sizer found the requested windw, exit. */
 610                 return TRUE;
 611             }
 612         }
 613         node = node->Next();
 614     }
 615
 616     return FALSE;
 617 }
 618
 619 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 620 {
 621     wxNode *node = m_children.Nth( pos );
 622     if (!node) return FALSE;
 623
 624     wxSizerItem *item = (wxSizerItem*) node->Data();
 625     if (item->GetSizer())
 626     {
 627         /* Sizers contains the minimal size in them, if not calculated ... */
 628         item->GetSizer()->DoSetMinSize( width, height );
 629     }
 630     else
 631     {
 632         /* ... whereas the minimal size of spacers and windows in stored
 633            in the item */
 634         item->SetInitSize( width, height );
 635     }
 636
 637     return TRUE;
 638 }
 639
 640 //---------------------------------------------------------------------------
 641 // wxGridSizer
 642 //---------------------------------------------------------------------------
 643
 644 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 645 {
 646     m_rows = rows;
 647     m_cols = cols;
 648     m_vgap = vgap;
 649     m_hgap = hgap;
 650 }
 651
 652 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 653 {
 654     m_rows = 0;
 655     m_cols = cols;
 656     m_vgap = vgap;
 657     m_hgap = hgap;
 658 }
 659
 660 void wxGridSizer::RecalcSizes()
 661 {
 662     if (m_children.GetCount() == 0)
 663         return;
 664
 665     int nitems = m_children.GetCount();
 666     int nrows = m_rows;
 667     int ncols = m_cols;
 668
 669     if (ncols > 0)
 670         nrows = (nitems + ncols-1) / ncols;
 671     else
 672         ncols = (nitems + nrows-1) / nrows;
 673
 674     wxSize sz( GetSize() );
 675     wxPoint pt( GetPosition() );
 676
 677     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 678     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 679
 680     int x = pt.x;
 681     for (int c = 0; c < ncols; c++)
 682     {
 683         int y = pt.y;
 684         for (int r = 0; r < nrows; r++)
 685         {
 686             int i = r * ncols + c;
 687             if (i < nitems)
 688             {
 689                 wxNode *node = m_children.Nth( i );
 690                 wxASSERT( node );
 691
 692                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 693             }
 694             y = y + h + m_vgap;
 695         }
 696         x = x + w + m_hgap;
 697     }
 698 }
 699
 700 wxSize wxGridSizer::CalcMin()
 701 {
 702     if (m_children.GetCount() == 0)
 703         return wxSize(10,10);
 704
 705     int nitems = m_children.GetCount();
 706     int nrows = m_rows;
 707     int ncols = m_cols;
 708
 709     if (ncols > 0)
 710         nrows = (nitems + ncols-1) / ncols;
 711     else
 712         ncols = (nitems + nrows-1) / nrows;
 713
 714     // Find the max width and height for any component
 715     int w = 0;
 716     int h = 0;
 717
 718     wxNode *node = m_children.First();
 719     while (node)
 720     {
 721         wxSizerItem *item = (wxSizerItem*)node->Data();
 722         wxSize sz( item->CalcMin() );
 723         w = wxMax( w, sz.x );
 724         h = wxMax( h, sz.y );
 725
 726         node = node->Next();
 727     }
 728
 729     return wxSize(ncols * w + (ncols-1) * m_hgap,
 730                   nrows * h + (nrows-1) * m_vgap);
 731 }
 732
 733 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 734 {
 735     wxPoint pt( x,y );
 736     wxSize sz( item->CalcMin() );
 737     int flag = item->GetFlag();
 738
 739     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 740     {
 741        sz = wxSize(w, h);
 742     }
 743     else
 744     {
 745         if (flag & wxALIGN_CENTER_HORIZONTAL)
 746         {
 747             pt.x = x + (w - sz.x) / 2;
 748         }
 749         else if (flag & wxALIGN_RIGHT)
 750         {
 751             pt.x = x + (w - sz.x);
 752         }
 753
 754         if (flag & wxALIGN_CENTER_VERTICAL)
 755         {
 756             pt.y = y + (h - sz.y) / 2;
 757         }
 758         else if (flag & wxALIGN_BOTTOM)
 759         {
 760             pt.y = y + (h - sz.y);
 761         }
 762     }
 763
 764     item->SetDimension(pt, sz);
 765 }
 766
 767 //---------------------------------------------------------------------------
 768 // wxFlexGridSizer
 769 //---------------------------------------------------------------------------
 770
 771 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 772    : wxGridSizer( rows, cols, vgap, hgap )
 773 {
 774     m_rowHeights = (int*) NULL;
 775     m_colWidths = (int*) NULL;
 776 }
 777
 778 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 779    : wxGridSizer( cols, vgap, hgap )
 780 {
 781     m_rowHeights = (int*) NULL;
 782     m_colWidths = (int*) NULL;
 783 }
 784
 785 wxFlexGridSizer::~wxFlexGridSizer()
 786 {
 787     if (m_rowHeights)
 788         delete[] m_rowHeights;
 789     if (m_colWidths)
 790         delete[] m_colWidths;
 791 }
 792
 793 void wxFlexGridSizer::CreateArrays()
 794 {
 795     if (m_rowHeights)
 796         delete[] m_rowHeights;
 797     if (m_colWidths)
 798         delete[] m_colWidths;
 799
 800     if (m_children.GetCount() == 0)
 801         return;
 802
 803     int nitems = m_children.GetCount();
 804     int nrows = m_rows;
 805     int ncols = m_cols;
 806
 807     if (ncols > 0)
 808         nrows = (nitems + ncols-1) / ncols;
 809     else
 810         ncols = (nitems + nrows-1) / nrows;
 811
 812     m_rowHeights = new int[nrows];
 813     m_colWidths = new int[ncols];
 814
 815     for (int col = 0; col < ncols; col++)
 816         m_colWidths[ col ] = 0;
 817     for (int row = 0; row < nrows; row++)
 818         m_rowHeights[ row ] = 0;
 819 }
 820
 821 void wxFlexGridSizer::RecalcSizes()
 822 {
 823     if (m_children.GetCount() == 0)
 824         return;
 825
 826     int nitems = m_children.GetCount();
 827     int nrows = m_rows;
 828     int ncols = m_cols;
 829
 830     if (ncols > 0)
 831         nrows = (nitems + ncols-1) / ncols;
 832     else
 833         ncols = (nitems + nrows-1) / nrows;
 834
 835     wxSize sz( GetSize() );
 836     wxSize minsz( CalcMin() );
 837     wxPoint pt( GetPosition() );
 838     int    delta;
 839     size_t idx,num;
 840     wxArrayInt temp;
 841
 842     // Transfer only those rows into temp which exist in the sizer
 843     // ignoring the superflouus ones. This prevents a segfault when
 844     // calling AddGrowableRow( 3 ) if the sizer only has 2 rows.
 845     for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 846         if (m_growableRows[idx] < nrows)
 847             temp.Add( m_growableRows[idx] );
 848     num = temp.GetCount();
 849
 850     if ((num > 0) && (sz.y > minsz.y))
 851     {
 852         delta = (sz.y - minsz.y) / num;
 853         for (idx = 0; idx < num; idx++)
 854             m_rowHeights[ temp[idx] ] += delta;
 855     }
 856
 857     temp.Empty();
 858     // See above
 859     for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 860         if (m_growableCols[idx] < ncols)
 861             temp.Add( m_growableCols[idx] );
 862     num = temp.GetCount();
 863
 864     if ((num > 0) && (sz.x > minsz.x))
 865     {
 866         delta = (sz.x - minsz.x) / num;
 867         for (idx = 0; idx < num; idx++)
 868             m_colWidths[ temp[idx] ] += delta;
 869     }
 870
 871     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 872
 873     int x = pt.x;
 874     for (int c = 0; c < ncols; c++)
 875     {
 876         int y = pt.y;
 877         for (int r = 0; r < nrows; r++)
 878         {
 879             int i = r * ncols + c;
 880             if (i < nitems)
 881             {
 882                 wxNode *node = m_children.Nth( i );
 883                 wxASSERT( node );
 884
 885                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 886                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 887
 888                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 889             }
 890             y = y + m_rowHeights[r] + m_vgap;
 891         }
 892         x = x + m_colWidths[c] + m_hgap;
 893     }
 894 }
 895
 896 wxSize wxFlexGridSizer::CalcMin()
 897 {
 898     if (m_children.GetCount() == 0)
 899         return wxSize(10,10);
 900
 901     int nitems = m_children.GetCount();
 902     int nrows = m_rows;
 903     int ncols = m_cols;
 904
 905     if (ncols > 0)
 906         nrows = (nitems + ncols-1) / ncols;
 907     else
 908         ncols = (nitems + nrows-1) / nrows;
 909
 910     CreateArrays();
 911
 912     int col;
 913     int row;
 914
 915     int i = 0;
 916     wxNode *node = m_children.First();
 917     while (node)
 918     {
 919         wxSizerItem *item = (wxSizerItem*)node->Data();
 920         wxSize sz( item->CalcMin() );
 921         row = i / ncols;
 922         col = i % ncols;
 923         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
 924         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
 925
 926         node = node->Next();
 927         i++;
 928     }
 929
 930     int width = 0;
 931     for (col = 0; col < ncols; col++)
 932         width += m_colWidths[ col ];
 933
 934     int height = 0;
 935     for (row = 0; row < nrows; row++)
 936         height += m_rowHeights[ row ];
 937
 938     return wxSize( width +  (ncols-1) * m_hgap,
 939                    height + (nrows-1) * m_vgap);
 940 }
 941
 942 void wxFlexGridSizer::AddGrowableRow( size_t idx )
 943 {
 944     m_growableRows.Add( idx );
 945 }
 946
 947 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
 948 {
 949 }
 950
 951 void wxFlexGridSizer::AddGrowableCol( size_t idx )
 952 {
 953     m_growableCols.Add( idx );
 954 }
 955
 956 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
 957 {
 958 }
 959
 960 //---------------------------------------------------------------------------
 961 // wxBoxSizer
 962 //---------------------------------------------------------------------------
 963
 964 wxBoxSizer::wxBoxSizer( int orient )
 965 {
 966     m_orient = orient;
 967 }
 968
 969 void wxBoxSizer::RecalcSizes()
 970 {
 971     if (m_children.GetCount() == 0)
 972         return;
 973
 974     int delta = 0;
 975     int extra = 0;
 976     if (m_stretchable)
 977     {
 978         if (m_orient == wxHORIZONTAL)
 979         {
 980             delta = (m_size.x - m_fixedWidth) / m_stretchable;
 981             extra = (m_size.x - m_fixedWidth) % m_stretchable;
 982         }
 983         else
 984         {
 985             delta = (m_size.y - m_fixedHeight) / m_stretchable;
 986             extra = (m_size.y - m_fixedHeight) % m_stretchable;
 987         }
 988     }
 989
 990     wxPoint pt( m_position );
 991
 992     wxNode *node = m_children.GetFirst();
 993     while (node)
 994     {
 995         wxSizerItem *item = (wxSizerItem*) node->Data();
 996
 997         int weight = 1;
 998         if (item->GetOption())
 999             weight = item->GetOption();
1000
1001         wxSize size( item->CalcMin() );
1002
1003         if (m_orient == wxVERTICAL)
1004         {
1005             wxCoord height = size.y;
1006             if (item->GetOption())
1007             {
1008                 height = (delta * weight) + extra;
1009                 extra = 0; // only the first item will get the remainder as extra size
1010             }
1011
1012             wxPoint child_pos( pt );
1013             wxSize  child_size( wxSize( size.x, height) );
1014
1015             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1016                 child_size.x = m_size.x;
1017             else if (item->GetFlag() & wxALIGN_RIGHT)
1018                 child_pos.x += m_size.x - size.x;
1019             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
1020             // XXX wxCENTER is added for backward compatibility;
1021             //     wxALIGN_CENTER should be used in new code
1022                 child_pos.x += (m_size.x - size.x) / 2;
1023
1024             item->SetDimension( child_pos, child_size );
1025
1026             pt.y += height;
1027         }
1028         else
1029         {
1030             wxCoord width = size.x;
1031             if (item->GetOption())
1032             {
1033                 width = (delta * weight) + extra;
1034                 extra = 0; // only the first item will get the remainder as extra size
1035             }
1036
1037             wxPoint child_pos( pt );
1038             wxSize  child_size( wxSize(width, size.y) );
1039
1040             if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1041                 child_size.y = m_size.y;
1042             else if (item->GetFlag() & wxALIGN_BOTTOM)
1043                 child_pos.y += m_size.y - size.y;
1044             else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
1045             // XXX wxCENTER is added for backward compatibility;
1046             //     wxALIGN_CENTER should be used in new code
1047                 child_pos.y += (m_size.y - size.y) / 2;
1048
1049             item->SetDimension( child_pos, child_size );
1050
1051             pt.x += width;
1052         }
1053
1054         node = node->Next();
1055     }
1056 }
1057
1058 wxSize wxBoxSizer::CalcMin()
1059 {
1060     if (m_children.GetCount() == 0)
1061         return wxSize(10,10);
1062
1063     m_stretchable = 0;
1064     m_minWidth = 0;
1065     m_minHeight = 0;
1066     m_fixedWidth = 0;
1067     m_fixedHeight = 0;
1068
1069     // Find how long each stretch unit needs to be
1070     int stretchSize = 1;
1071     wxNode *node = m_children.GetFirst();
1072     while (node)
1073     {
1074         wxSizerItem *item = (wxSizerItem*) node->Data();
1075         if (item->GetOption() != 0)
1076         {
1077             int stretch = item->GetOption();
1078             wxSize size( item->CalcMin() );
1079             int sizePerStretch;
1080             // Integer division rounded up is (a + b - 1) / b
1081             if (m_orient == wxHORIZONTAL)
1082                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1083             else
1084                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1085             if (sizePerStretch > stretchSize)
1086                 stretchSize = sizePerStretch;
1087         }
1088         node = node->Next();
1089     }
1090     // Calculate overall minimum size
1091     node = m_children.GetFirst();
1092     while (node)
1093     {
1094         wxSizerItem *item = (wxSizerItem*) node->Data();
1095
1096         m_stretchable += item->GetOption();
1097
1098         wxSize size( item->CalcMin() );
1099         if (item->GetOption() != 0)
1100         {
1101             if (m_orient == wxHORIZONTAL)
1102                 size.x = stretchSize * item->GetOption();
1103             else
1104                 size.y = stretchSize * item->GetOption();
1105         }
1106
1107         if (m_orient == wxHORIZONTAL)
1108         {
1109             m_minWidth += size.x;
1110             m_minHeight = wxMax( m_minHeight, size.y );
1111         }
1112         else
1113         {
1114             m_minHeight += size.y;
1115             m_minWidth = wxMax( m_minWidth, size.x );
1116         }
1117
1118         if (item->GetOption() == 0)
1119         {
1120             if (m_orient == wxVERTICAL)
1121             {
1122                 m_fixedHeight += size.y;
1123                 m_fixedWidth = wxMax( m_fixedWidth, size.x );
1124             }
1125             else
1126             {
1127                 m_fixedWidth += size.x;
1128                 m_fixedHeight = wxMax( m_fixedHeight, size.y );
1129             }
1130         }
1131
1132         node = node->Next();
1133     }
1134
1135     return wxSize( m_minWidth, m_minHeight );
1136 }
1137
1138 //---------------------------------------------------------------------------
1139 // wxStaticBoxSizer
1140 //---------------------------------------------------------------------------
1141
1142 #if wxUSE_STATBOX
1143
1144 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1145                 : wxBoxSizer( orient )
1146 {
1147     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1148
1149     m_staticBox = box;
1150 }
1151
1152 static void GetStaticBoxBorders(wxStaticBox *box,
1153                                 int *borderTop, int *borderOther)
1154 {
1155     // this has to be done platform by platform as there is no way to
1156     // guess the thickness of a wxStaticBox border
1157 #ifdef __WXGTK__
1158     if ( box->GetLabel().IsEmpty() )
1159         *borderTop = 5;
1160     else
1161 #endif // __WXGTK__
1162         *borderTop = 15;
1163     (void)box;
1164     *borderOther = 5;
1165 }
1166
1167 void wxStaticBoxSizer::RecalcSizes()
1168 {
1169     int top_border, other_border;
1170     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1171
1172     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1173
1174     wxPoint old_pos( m_position );
1175     m_position.x += other_border;
1176     m_position.y += top_border;
1177     wxSize old_size( m_size );
1178     m_size.x -= 2*other_border;
1179     m_size.y -= top_border + other_border;
1180
1181     wxBoxSizer::RecalcSizes();
1182
1183     m_position = old_pos;
1184     m_size = old_size;
1185 }
1186
1187 wxSize wxStaticBoxSizer::CalcMin()
1188 {
1189     int top_border, other_border;
1190     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1191
1192     wxSize ret( wxBoxSizer::CalcMin() );
1193     ret.x += 2*other_border;
1194     ret.y += other_border + top_border;
1195
1196     return ret;
1197 }
1198
1199 #endif // wxUSE_STATBOX
1200
1201 //---------------------------------------------------------------------------
1202 // wxNotebookSizer
1203 //---------------------------------------------------------------------------
1204
1205 #if wxUSE_NOTEBOOK
1206
1207 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1208 {
1209     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1210
1211     m_notebook = nb;
1212 }
1213
1214 void wxNotebookSizer::RecalcSizes()
1215 {
1216     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1217 }
1218
1219 wxSize wxNotebookSizer::CalcMin()
1220 {
1221     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1222
1223     sizeBorder.x += 5;
1224     sizeBorder.y += 5;
1225
1226     if (m_notebook->GetChildren().GetCount() == 0)
1227     {
1228         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1229     }
1230
1231     int maxX = 0;
1232     int maxY = 0;
1233
1234     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1235     while (node)
1236     {
1237         wxWindow *item = node->GetData();
1238         wxSizer *itemsizer = item->GetSizer();
1239
1240         if (itemsizer)
1241         {
1242             wxSize subsize( itemsizer->CalcMin() );
1243
1244             if (subsize.x > maxX)
1245                 maxX = subsize.x;
1246             if (subsize.y > maxY)
1247                 maxY = subsize.y;
1248         }
1249
1250         node = node->GetNext();
1251     }
1252
1253     return wxSize( maxX, maxY ) + sizeBorder;
1254 }
1255
1256 #endif // wxUSE_NOTEBOOK
1257
1258 // vi:sts=4:sw=4:et