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     : m_window( 0 )
  48     , m_sizer( 0 )
  49     , m_size( wxSize( width, height ) ) // size is set directly
  50     , m_minSize( m_size )               // minimal size is the initial size
  51     , m_option( option )
  52     , m_border( border )
  53     , m_flag( flag )
  54     , m_show( TRUE )                    // Cannot be changed
  55     , m_userData( userData )
  56 {
  57     SetRatio( m_size );
  58 }
  59
  60 wxSizerItem::wxSizerItem( wxWindow *window, int option, int flag, int border, wxObject* userData )
  61     : m_window( window )
  62     , m_sizer( 0 )
  63     , m_minSize( window->GetSize() )    // minimal size is the initial size
  64     , m_option( option )
  65     , m_border( border )
  66     , m_flag( flag )
  67     , m_show( TRUE )
  68     , m_userData( userData )
  69 {
  70     // aspect ratio calculated from initial size
  71     SetRatio( m_minSize );
  72
  73     // m_size is calculated later
  74 }
  75
  76 wxSizerItem::wxSizerItem( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
  77     : m_window( 0 )
  78     , m_sizer( sizer )
  79     , m_option( option )
  80     , m_border( border )
  81     , m_flag( flag )
  82     , m_show( TRUE )
  83     , m_ratio( 0 )
  84     , m_userData( userData )
  85 {
  86     // m_minSize is calculated later
  87     // m_size is calculated later
  88 }
  89
  90 wxSizerItem::~wxSizerItem()
  91 {
  92     if (m_userData)
  93         delete m_userData;
  94     if (m_sizer)
  95         delete m_sizer;
  96 }
  97
  98
  99 wxSize wxSizerItem::GetSize()
 100 {
 101     wxSize ret;
 102     if (IsSizer())
 103         ret = m_sizer->GetSize();
 104     else
 105     if (IsWindow())
 106         ret = m_window->GetSize();
 107     else ret = m_size;
 108
 109     if (m_flag & wxWEST)
 110         ret.x += m_border;
 111     if (m_flag & wxEAST)
 112         ret.x += m_border;
 113     if (m_flag & wxNORTH)
 114         ret.y += m_border;
 115     if (m_flag & wxSOUTH)
 116         ret.y += m_border;
 117
 118     return ret;
 119 }
 120
 121 wxSize wxSizerItem::CalcMin()
 122 {
 123     wxSize ret;
 124     if (IsSizer())
 125     {
 126         ret = m_sizer->GetMinSize();
 127
 128         // if we have to preserve aspect ratio _AND_ this is
 129         // the first-time calculation, consider ret to be initial size
 130         if ((m_flag & wxSHAPED) && !m_ratio)
 131             SetRatio(ret);
 132     }
 133     else
 134     {
 135         if ( IsWindow() && (m_flag & wxADJUST_MINSIZE) )
 136         {
 137             // By user request, keep the minimal size for this item
 138             // in sync with the largest of BestSize and any user supplied
 139             // minimum size hint.  Useful in cases where the item is
 140             // changeable -- static text labels, etc.
 141             m_minSize = m_window->GetAdjustedBestSize();
 142         }
 143
 144         ret = m_minSize;
 145     }
 146
 147     if (m_flag & wxWEST)
 148         ret.x += m_border;
 149     if (m_flag & wxEAST)
 150         ret.x += m_border;
 151     if (m_flag & wxNORTH)
 152         ret.y += m_border;
 153     if (m_flag & wxSOUTH)
 154         ret.y += m_border;
 155
 156     return ret;
 157 }
 158
 159 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 160 {
 161     if (m_flag & wxSHAPED)
 162     {
 163         // adjust aspect ratio
 164         int rwidth = (int) (size.y * m_ratio);
 165         if (rwidth > size.x)
 166         {
 167             // fit horizontally
 168             int rheight = (int) (size.x / m_ratio);
 169             // add vertical space
 170             if (m_flag & wxALIGN_CENTER_VERTICAL)
 171                 pos.y += (size.y - rheight) / 2;
 172             else if (m_flag & wxALIGN_BOTTOM)
 173                 pos.y += (size.y - rheight);
 174             // use reduced dimensions
 175             size.y =rheight;
 176         }
 177         else if (rwidth < size.x)
 178         {
 179             // add horizontal space
 180             if (m_flag & wxALIGN_CENTER_HORIZONTAL)
 181                 pos.x += (size.x - rwidth) / 2;
 182             else if (m_flag & wxALIGN_RIGHT)
 183                 pos.x += (size.x - rwidth);
 184             size.x = rwidth;
 185         }
 186     }
 187
 188     // This is what GetPosition() returns. Since we calculate
 189     // borders afterwards, GetPosition() will be the left/top
 190     // corner of the surrounding border.
 191     m_pos = pos;
 192
 193     if (m_flag & wxWEST)
 194     {
 195         pos.x += m_border;
 196         size.x -= m_border;
 197     }
 198     if (m_flag & wxEAST)
 199     {
 200         size.x -= m_border;
 201     }
 202     if (m_flag & wxNORTH)
 203     {
 204         pos.y += m_border;
 205         size.y -= m_border;
 206     }
 207     if (m_flag & wxSOUTH)
 208     {
 209         size.y -= m_border;
 210     }
 211
 212     if (IsSizer())
 213         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 214
 215     if (IsWindow())
 216         m_window->SetSize( pos.x, pos.y, size.x, size.y, wxSIZE_ALLOW_MINUS_ONE );
 217
 218     m_size = size;
 219 }
 220
 221 void wxSizerItem::DeleteWindows()
 222 {
 223     if (m_window)
 224          m_window->Destroy();
 225
 226     if (m_sizer)
 227         m_sizer->DeleteWindows();
 228 }
 229
 230 bool wxSizerItem::IsWindow()
 231 {
 232     return (m_window != NULL);
 233 }
 234
 235 bool wxSizerItem::IsSizer()
 236 {
 237     return (m_sizer != NULL);
 238 }
 239
 240 bool wxSizerItem::IsSpacer()
 241 {
 242     return (m_window == NULL) && (m_sizer == NULL);
 243 }
 244
 245 //---------------------------------------------------------------------------
 246 // wxSizer
 247 //---------------------------------------------------------------------------
 248
 249 wxSizer::wxSizer()
 250 {
 251     m_children.DeleteContents( TRUE );
 252     m_minSize.x = 0;
 253     m_minSize.y = 0;
 254 }
 255
 256 wxSizer::~wxSizer()
 257 {
 258     Clear();
 259 }
 260
 261 void wxSizer::Add( wxWindow *window, int option, int flag, int border, wxObject* userData )
 262 {
 263     m_children.Append( new wxSizerItem( window, option, flag, border, userData ) );
 264     window->SetContainingSizer(this);
 265 }
 266
 267 void wxSizer::Add( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 268 {
 269     m_children.Append( new wxSizerItem( sizer, option, flag, border, userData ) );
 270 }
 271
 272 void wxSizer::Add( int width, int height, int option, int flag, int border, wxObject* userData )
 273 {
 274     m_children.Append( new wxSizerItem( width, height, option, flag, border, userData ) );
 275 }
 276
 277 void wxSizer::Prepend( wxWindow *window, int option, int flag, int border, wxObject* userData )
 278 {
 279     m_children.Insert( new wxSizerItem( window, option, flag, border, userData ) );
 280     window->SetContainingSizer(this);
 281 }
 282
 283 void wxSizer::Prepend( wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 284 {
 285     m_children.Insert( new wxSizerItem( sizer, option, flag, border, userData ) );
 286 }
 287
 288 void wxSizer::Prepend( int width, int height, int option, int flag, int border, wxObject* userData )
 289 {
 290     m_children.Insert( new wxSizerItem( width, height, option, flag, border, userData ) );
 291 }
 292
 293 void wxSizer::Insert( int before, wxWindow *window, int option, int flag, int border, wxObject* userData )
 294 {
 295     m_children.Insert( before, new wxSizerItem( window, option, flag, border, userData ) );
 296     window->SetContainingSizer(this);
 297 }
 298
 299 void wxSizer::Insert( int before, wxSizer *sizer, int option, int flag, int border, wxObject* userData )
 300 {
 301     m_children.Insert( before, new wxSizerItem( sizer, option, flag, border, userData ) );
 302 }
 303
 304 void wxSizer::Insert( int before, int width, int height, int option, int flag, int border, wxObject* userData )
 305 {
 306     m_children.Insert( before, new wxSizerItem( width, height, option, flag, border, userData ) );
 307 }
 308
 309 bool wxSizer::Remove( wxWindow *window )
 310 {
 311     wxASSERT( window );
 312
 313     wxNode *node = m_children.First();
 314     while (node)
 315     {
 316         wxSizerItem *item = (wxSizerItem*)node->Data();
 317         if (item->GetWindow() == window)
 318         {
 319             item->GetWindow()->SetContainingSizer(NULL);
 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     if ((size_t)pos >= m_children.GetCount())
 351         return FALSE;
 352     wxNode *node = m_children.Nth( pos );
 353     if (!node) return FALSE;
 354
 355     m_children.DeleteNode( node );
 356
 357     return TRUE;
 358 }
 359
 360 bool wxSizer::Detach( wxSizer *sizer )
 361 {
 362     wxASSERT( sizer );
 363
 364     wxNode *node = m_children.First();
 365     while (node)
 366     {
 367         wxSizerItem *item = (wxSizerItem*)node->Data();
 368         if (item->GetSizer() == sizer)
 369         {
 370             item->DetachSizer();
 371             m_children.DeleteNode( node );
 372             return TRUE;
 373         }
 374         node = node->Next();
 375     }
 376
 377     return FALSE;
 378 }
 379
 380 bool wxSizer::Detach( int pos )
 381 {
 382     if ((size_t)pos >= m_children.GetCount())
 383         return FALSE;
 384     wxNode *node = m_children.Nth( pos );
 385     if (!node) return FALSE;
 386
 387     ( (wxSizerItem*)node->Data() )->DetachSizer();
 388     m_children.DeleteNode( node );
 389
 390     return TRUE;
 391 }
 392
 393 void wxSizer::Clear( bool delete_windows )
 394 {
 395     // First clear the ContainingSizer pointers
 396     wxNode *node = m_children.First();
 397     while (node)
 398     {
 399         wxSizerItem *item = (wxSizerItem*)node->Data();
 400         if (item->IsWindow())
 401             item->GetWindow()->SetContainingSizer(NULL);
 402         node = node->Next();
 403     }
 404
 405     // Destroy the windows if needed
 406     if (delete_windows)
 407         DeleteWindows();
 408
 409     // Now empty the list
 410     m_children.Clear();
 411 }
 412
 413 void wxSizer::DeleteWindows()
 414 {
 415     wxNode *node = m_children.First();
 416     while (node)
 417     {
 418         wxSizerItem *item = (wxSizerItem*)node->Data();
 419         item->DeleteWindows();
 420         node = node->Next();
 421     }
 422 }
 423
 424 wxSize wxSizer::Fit( wxWindow *window )
 425 {
 426     wxSize size;
 427     if (window->IsTopLevel())
 428         size = FitSize( window );
 429     else
 430         size = GetMinWindowSize( window );
 431
 432     window->SetSize( size );
 433
 434     return size;
 435 }
 436
 437 void wxSizer::FitInside( wxWindow *window )
 438 {
 439     wxSize size;
 440     if (window->IsTopLevel())
 441         size = VirtualFitSize( window );
 442     else
 443         size = GetMinClientSize( window );
 444
 445     window->SetVirtualSize( size );
 446 }
 447
 448 void wxSizer::Layout()
 449 {
 450     CalcMin();
 451     RecalcSizes();
 452 }
 453
 454 void wxSizer::SetSizeHints( wxWindow *window )
 455 {
 456     // Preserve the window's max size hints, but set the
 457     // lower bound according to the sizer calculations.
 458
 459     wxSize size = Fit( window );
 460
 461     window->SetSizeHints( size.x,
 462                           size.y,
 463                           window->GetMaxWidth(),
 464                           window->GetMaxHeight() );
 465 }
 466
 467 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 468 {
 469     // Preserve the window's max size hints, but set the
 470     // lower bound according to the sizer calculations.
 471
 472     FitInside( window );
 473     wxSize size( window->GetVirtualSize() );
 474     window->SetVirtualSizeHints( size.x,
 475                                  size.y,
 476                                  window->GetMaxWidth(),
 477                                  window->GetMaxHeight() );
 478 }
 479
 480 wxSize wxSizer::GetMaxWindowSize( wxWindow *window )
 481 {
 482     return window->GetMaxSize();
 483 }
 484
 485 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 486 {
 487     wxSize minSize( GetMinSize() );
 488     wxSize size( window->GetSize() );
 489     wxSize client_size( window->GetClientSize() );
 490     return wxSize( minSize.x+size.x-client_size.x,
 491                    minSize.y+size.y-client_size.y );
 492 }
 493
 494 // Return a window size that will fit within the screens dimensions
 495 wxSize wxSizer::FitSize( wxWindow *window )
 496 {
 497     wxSize size     = GetMinWindowSize( window );
 498     wxSize sizeMax  = GetMaxWindowSize( window );
 499
 500     // Limit the size if sizeMax != wxDefaultSize
 501
 502     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 503         size.x = sizeMax.x;
 504     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 505         size.y = sizeMax.y;
 506
 507     return size;
 508 }
 509
 510 wxSize wxSizer::GetMaxClientSize( wxWindow *window )
 511 {
 512     wxSize maxSize( window->GetMaxSize() );
 513
 514     if( maxSize != wxDefaultSize )
 515     {
 516         wxSize size( window->GetSize() );
 517         wxSize client_size( window->GetClientSize() );
 518
 519         return wxSize( maxSize.x + client_size.x - size.x,
 520                        maxSize.y + client_size.y - size.y );
 521     }
 522     else
 523         return wxDefaultSize;
 524 }
 525
 526 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
 527 {
 528     return GetMinSize();  // Already returns client size.
 529 }
 530
 531 wxSize wxSizer::VirtualFitSize( wxWindow *window )
 532 {
 533     wxSize size     = GetMinClientSize( window );
 534     wxSize sizeMax  = GetMaxClientSize( window );
 535
 536     // Limit the size if sizeMax != wxDefaultSize
 537
 538     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 539         size.x = sizeMax.x;
 540     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 541         size.y = sizeMax.y;
 542
 543     return size;
 544 }
 545
 546 void wxSizer::SetDimension( int x, int y, int width, int height )
 547 {
 548     m_position.x = x;
 549     m_position.y = y;
 550     m_size.x = width;
 551     m_size.y = height;
 552     Layout();
 553 }
 554
 555 wxSize wxSizer::GetMinSize()
 556 {
 557     wxSize ret( CalcMin() );
 558     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 559     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 560     return ret;
 561 }
 562
 563 void wxSizer::DoSetMinSize( int width, int height )
 564 {
 565     m_minSize.x = width;
 566     m_minSize.y = height;
 567 }
 568
 569 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 570 {
 571     wxASSERT( window );
 572
 573     wxNode *node = m_children.First();
 574     while (node)
 575     {
 576         wxSizerItem *item = (wxSizerItem*)node->Data();
 577         if (item->GetWindow() == window)
 578         {
 579             item->SetInitSize( width, height );
 580             return TRUE;
 581         }
 582         node = node->Next();
 583     }
 584
 585     node = m_children.First();
 586     while (node)
 587     {
 588         wxSizerItem *item = (wxSizerItem*)node->Data();
 589         if (item->GetSizer())
 590         {
 591             // It's a sizer, so lets search recursively.
 592             if (item->GetSizer()->DoSetItemMinSize( window, width, height ))
 593             {
 594                 // A child sizer found the requested windw, exit.
 595                 return TRUE;
 596             }
 597         }
 598         node = node->Next();
 599     }
 600
 601     return FALSE;
 602 }
 603
 604 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 605 {
 606     wxASSERT( sizer );
 607
 608     wxNode *node = m_children.First();
 609     while (node)
 610     {
 611         wxSizerItem *item = (wxSizerItem*)node->Data();
 612         if (item->GetSizer() == sizer)
 613         {
 614             item->GetSizer()->DoSetMinSize( width, height );
 615             return TRUE;
 616         }
 617         node = node->Next();
 618     }
 619
 620     node = m_children.First();
 621     while (node)
 622     {
 623         wxSizerItem *item = (wxSizerItem*)node->Data();
 624         if (item->GetSizer())
 625         {
 626             // It's a sizer, so lets search recursively.
 627             if (item->GetSizer()->DoSetItemMinSize( sizer, width, height ))
 628             {
 629                 // A child sizer found the requested windw, exit.
 630                 return TRUE;
 631             }
 632         }
 633         node = node->Next();
 634     }
 635
 636     return FALSE;
 637 }
 638
 639 bool wxSizer::DoSetItemMinSize( int pos, int width, int height )
 640 {
 641     wxNode *node = m_children.Nth( pos );
 642     if (!node) return FALSE;
 643
 644     wxSizerItem *item = (wxSizerItem*) node->Data();
 645     if (item->GetSizer())
 646     {
 647         // Sizers contains the minimal size in them, if not calculated ...
 648         item->GetSizer()->DoSetMinSize( width, height );
 649     }
 650     else
 651     {
 652         // ... but the minimal size of spacers and windows in stored in them
 653         item->SetInitSize( width, height );
 654     }
 655
 656     return TRUE;
 657 }
 658
 659 void wxSizer::Show(wxWindow *window, bool show)
 660 {
 661     wxNode *node = m_children.GetFirst();
 662     while (node)
 663     {
 664         wxSizerItem *item = (wxSizerItem*) node->Data();
 665
 666         if (item->IsWindow() && item->GetWindow() == window)
 667         {
 668             item->Show(show);
 669             window->Show(show);
 670             return;
 671         }
 672         node = node->Next();
 673     }
 674 }
 675
 676 void wxSizer::Show(wxSizer *sizer, bool show)
 677 {
 678     wxNode *node = m_children.GetFirst();
 679     while (node)
 680     {
 681         wxSizerItem *item = (wxSizerItem*) node->Data();
 682
 683         if (item->IsSizer() && item->GetSizer() == sizer)
 684         {
 685             item->Show(show);
 686             sizer->ShowItems(show);
 687             return;
 688         }
 689         node = node->Next();
 690     }
 691 }
 692
 693 void wxSizer::ShowItems (bool show)
 694 {
 695     wxNode *node = m_children.GetFirst();
 696     while (node)
 697     {
 698         wxSizerItem *item = (wxSizerItem*) node->Data();
 699
 700         if (item->IsWindow())
 701             item->GetWindow()->Show (show);
 702         else if (item->IsSizer())
 703             item->GetSizer()->ShowItems (show);
 704
 705         node = node->Next();
 706     }
 707 }
 708
 709 bool wxSizer::IsShown (wxWindow *window)
 710 {
 711     wxNode *node = m_children.GetFirst();
 712     while (node)
 713     {
 714         wxSizerItem *item = (wxSizerItem*) node->Data();
 715
 716         if (item->IsWindow() && item->GetWindow() == window)
 717         {
 718             return item->IsShown();
 719         }
 720         node = node->Next();
 721     }
 722
 723     return FALSE;
 724 }
 725
 726 bool wxSizer::IsShown (wxSizer *sizer)
 727 {
 728     wxNode *node = m_children.GetFirst();
 729     while (node)
 730     {
 731         wxSizerItem *item = (wxSizerItem*) node->Data();
 732
 733         if (item->IsSizer() && item->GetSizer() == sizer)
 734         {
 735             return item->IsShown();
 736         }
 737         node = node->Next();
 738     }
 739
 740     return FALSE;
 741 }
 742
 743 //---------------------------------------------------------------------------
 744 // wxGridSizer
 745 //---------------------------------------------------------------------------
 746
 747 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 748 {
 749     m_rows = rows;
 750     m_cols = cols;
 751     m_vgap = vgap;
 752     m_hgap = hgap;
 753 }
 754
 755 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 756 {
 757     m_rows = 0;
 758     m_cols = cols;
 759     m_vgap = vgap;
 760     m_hgap = hgap;
 761 }
 762
 763 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
 764 {
 765     int nitems = m_children.GetCount();
 766     if ( nitems)
 767     {
 768         if ( m_cols )
 769         {
 770             ncols = m_cols;
 771             nrows = (nitems + m_cols - 1) / m_cols;
 772         }
 773         else if ( m_rows )
 774         {
 775             ncols = (nitems + m_rows - 1) / m_rows;
 776             nrows = m_rows;
 777         }
 778         else // 0 columns, 0 rows?
 779         {
 780             wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
 781
 782             nrows = ncols = 0;
 783         }
 784     }
 785
 786     return nitems;
 787 }
 788
 789 void wxGridSizer::RecalcSizes()
 790 {
 791     int nitems, nrows, ncols;
 792     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 793         return;
 794
 795     wxSize sz( GetSize() );
 796     wxPoint pt( GetPosition() );
 797
 798     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 799     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 800
 801     int x = pt.x;
 802     for (int c = 0; c < ncols; c++)
 803     {
 804         int y = pt.y;
 805         for (int r = 0; r < nrows; r++)
 806         {
 807             int i = r * ncols + c;
 808             if (i < nitems)
 809             {
 810                 wxNode *node = m_children.Nth( i );
 811                 wxASSERT( node );
 812
 813                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 814             }
 815             y = y + h + m_vgap;
 816         }
 817         x = x + w + m_hgap;
 818     }
 819 }
 820
 821 wxSize wxGridSizer::CalcMin()
 822 {
 823     int nitems, nrows, ncols;
 824     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 825         return wxSize(10, 10);
 826
 827     // Find the max width and height for any component
 828     int w = 0;
 829     int h = 0;
 830
 831     wxNode *node = m_children.First();
 832     while (node)
 833     {
 834         wxSizerItem *item = (wxSizerItem*)node->Data();
 835         wxSize sz( item->CalcMin() );
 836         w = wxMax( w, sz.x );
 837         h = wxMax( h, sz.y );
 838
 839         node = node->Next();
 840     }
 841
 842     return wxSize(ncols * w + (ncols-1) * m_hgap,
 843                   nrows * h + (nrows-1) * m_vgap);
 844 }
 845
 846 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 847 {
 848     wxPoint pt( x,y );
 849     wxSize sz( item->CalcMin() );
 850     int flag = item->GetFlag();
 851
 852     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 853     {
 854        sz = wxSize(w, h);
 855     }
 856     else
 857     {
 858         if (flag & wxALIGN_CENTER_HORIZONTAL)
 859         {
 860             pt.x = x + (w - sz.x) / 2;
 861         }
 862         else if (flag & wxALIGN_RIGHT)
 863         {
 864             pt.x = x + (w - sz.x);
 865         }
 866
 867         if (flag & wxALIGN_CENTER_VERTICAL)
 868         {
 869             pt.y = y + (h - sz.y) / 2;
 870         }
 871         else if (flag & wxALIGN_BOTTOM)
 872         {
 873             pt.y = y + (h - sz.y);
 874         }
 875     }
 876
 877     item->SetDimension(pt, sz);
 878 }
 879
 880 //---------------------------------------------------------------------------
 881 // wxFlexGridSizer
 882 //---------------------------------------------------------------------------
 883
 884 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 885    : wxGridSizer( rows, cols, vgap, hgap )
 886 {
 887     m_rowHeights = (int*) NULL;
 888     m_colWidths = (int*) NULL;
 889 }
 890
 891 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
 892    : wxGridSizer( cols, vgap, hgap )
 893 {
 894     m_rowHeights = (int*) NULL;
 895     m_colWidths = (int*) NULL;
 896 }
 897
 898 wxFlexGridSizer::~wxFlexGridSizer()
 899 {
 900     if (m_rowHeights)
 901         delete[] m_rowHeights;
 902     if (m_colWidths)
 903         delete[] m_colWidths;
 904 }
 905
 906 void wxFlexGridSizer::CreateArrays()
 907 {
 908     if (m_rowHeights)
 909         delete[] m_rowHeights;
 910     if (m_colWidths)
 911         delete[] m_colWidths;
 912
 913     int nitems, nrows, ncols;
 914     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 915     {
 916         m_rowHeights =
 917         m_colWidths = NULL;
 918     }
 919
 920     m_rowHeights = new int[nrows];
 921     m_colWidths = new int[ncols];
 922
 923     for (int col = 0; col < ncols; col++)
 924         m_colWidths[ col ] = 0;
 925     for (int row = 0; row < nrows; row++)
 926         m_rowHeights[ row ] = 0;
 927 }
 928
 929 void wxFlexGridSizer::RecalcSizes()
 930 {
 931     int nitems, nrows, ncols;
 932     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 933         return;
 934
 935     wxSize sz( GetSize() );
 936     wxSize minsz( CalcMin() );
 937     wxPoint pt( GetPosition() );
 938     int    delta;
 939     size_t idx,num;
 940     wxArrayInt temp;
 941
 942     // Transfer only those rows into temp which exist in the sizer
 943     // ignoring the superflouus ones. This prevents a segfault when
 944     // calling AddGrowableRow( 3 ) if the sizer only has 2 rows.
 945     for (idx = 0; idx < m_growableRows.GetCount(); idx++)
 946         if (m_growableRows[idx] < nrows)
 947             temp.Add( m_growableRows[idx] );
 948     num = temp.GetCount();
 949
 950     if ((num > 0) && (sz.y > minsz.y))
 951     {
 952         delta = (sz.y - minsz.y) / num;
 953         for (idx = 0; idx < num; idx++)
 954             m_rowHeights[ temp[idx] ] += delta;
 955     }
 956
 957     temp.Empty();
 958     // See above
 959     for (idx = 0; idx < m_growableCols.GetCount(); idx++)
 960         if (m_growableCols[idx] < ncols)
 961             temp.Add( m_growableCols[idx] );
 962     num = temp.GetCount();
 963
 964     if ((num > 0) && (sz.x > minsz.x))
 965     {
 966         delta = (sz.x - minsz.x) / num;
 967         for (idx = 0; idx < num; idx++)
 968             m_colWidths[ temp[idx] ] += delta;
 969     }
 970
 971     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
 972
 973     int x = pt.x;
 974     for (int c = 0; c < ncols; c++)
 975     {
 976         int y = pt.y;
 977         for (int r = 0; r < nrows; r++)
 978         {
 979             int i = r * ncols + c;
 980             if (i < nitems)
 981             {
 982                 wxNode *node = m_children.Nth( i );
 983                 wxASSERT( node );
 984
 985                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
 986                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
 987
 988                 SetItemBounds( (wxSizerItem*) node->Data(), x, y, w, h);
 989             }
 990             y = y + m_rowHeights[r] + m_vgap;
 991         }
 992         x = x + m_colWidths[c] + m_hgap;
 993     }
 994 }
 995
 996 wxSize wxFlexGridSizer::CalcMin()
 997 {
 998     int nitems, nrows, ncols;
 999     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1000         return wxSize(10,10);
1001
1002     CreateArrays();
1003
1004     int i = 0;
1005     wxNode *node = m_children.First();
1006     while (node)
1007     {
1008         wxSizerItem *item = (wxSizerItem*)node->Data();
1009         wxSize sz( item->CalcMin() );
1010         int row = i / ncols;
1011         int col = i % ncols;
1012         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
1013         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
1014
1015         node = node->Next();
1016         i++;
1017     }
1018
1019     int width = 0;
1020     for (int col = 0; col < ncols; col++)
1021         width += m_colWidths[ col ];
1022
1023     int height = 0;
1024     for (int row = 0; row < nrows; row++)
1025         height += m_rowHeights[ row ];
1026
1027     return wxSize( width +  (ncols-1) * m_hgap,
1028                    height + (nrows-1) * m_vgap);
1029 }
1030
1031 void wxFlexGridSizer::AddGrowableRow( size_t idx )
1032 {
1033     m_growableRows.Add( idx );
1034 }
1035
1036 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
1037 {
1038 }
1039
1040 void wxFlexGridSizer::AddGrowableCol( size_t idx )
1041 {
1042     m_growableCols.Add( idx );
1043 }
1044
1045 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
1046 {
1047 }
1048
1049 //---------------------------------------------------------------------------
1050 // wxBoxSizer
1051 //---------------------------------------------------------------------------
1052
1053 wxBoxSizer::wxBoxSizer( int orient )
1054 {
1055     m_orient = orient;
1056 }
1057
1058 void wxBoxSizer::RecalcSizes()
1059 {
1060     if (m_children.GetCount() == 0)
1061         return;
1062
1063     int delta = 0;
1064     int extra = 0;
1065     if (m_stretchable)
1066     {
1067         if (m_orient == wxHORIZONTAL)
1068         {
1069             delta = (m_size.x - m_fixedWidth) / m_stretchable;
1070             extra = (m_size.x - m_fixedWidth) % m_stretchable;
1071         }
1072         else
1073         {
1074             delta = (m_size.y - m_fixedHeight) / m_stretchable;
1075             extra = (m_size.y - m_fixedHeight) % m_stretchable;
1076         }
1077     }
1078
1079     wxPoint pt( m_position );
1080
1081     wxNode *node = m_children.GetFirst();
1082     while (node)
1083     {
1084         wxSizerItem *item = (wxSizerItem*) node->Data();
1085         if (item->IsShown())
1086         {
1087             int weight = 1;
1088             if (item->GetOption())
1089                 weight = item->GetOption();
1090
1091             wxSize size( item->CalcMin() );
1092
1093             if (m_orient == wxVERTICAL)
1094             {
1095                 wxCoord height = size.y;
1096                 if (item->GetOption())
1097                 {
1098                     height = (delta * weight) + extra;
1099                     extra = 0; // only the first item will get the remainder as extra size
1100                 }
1101
1102                 wxPoint child_pos( pt );
1103                 wxSize  child_size( wxSize( size.x, height) );
1104
1105                 if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1106                     child_size.x = m_size.x;
1107                 else if (item->GetFlag() & wxALIGN_RIGHT)
1108                     child_pos.x += m_size.x - size.x;
1109                 else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
1110                 // XXX wxCENTER is added for backward compatibility;
1111                 //     wxALIGN_CENTER should be used in new code
1112                     child_pos.x += (m_size.x - size.x) / 2;
1113
1114                 item->SetDimension( child_pos, child_size );
1115
1116                 pt.y += height;
1117             }
1118             else
1119             {
1120                 wxCoord width = size.x;
1121                 if (item->GetOption())
1122                 {
1123                     width = (delta * weight) + extra;
1124                     extra = 0; // only the first item will get the remainder as extra size
1125                 }
1126
1127                 wxPoint child_pos( pt );
1128                 wxSize  child_size( wxSize(width, size.y) );
1129
1130                 if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1131                     child_size.y = m_size.y;
1132                 else if (item->GetFlag() & wxALIGN_BOTTOM)
1133                     child_pos.y += m_size.y - size.y;
1134                 else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
1135                 // XXX wxCENTER is added for backward compatibility;
1136                 //     wxALIGN_CENTER should be used in new code
1137                     child_pos.y += (m_size.y - size.y) / 2;
1138
1139                 item->SetDimension( child_pos, child_size );
1140
1141                 pt.x += width;
1142             }
1143         }
1144
1145         node = node->Next();
1146     }
1147 }
1148
1149 wxSize wxBoxSizer::CalcMin()
1150 {
1151     if (m_children.GetCount() == 0)
1152         return wxSize(10,10);
1153
1154     m_stretchable = 0;
1155     m_minWidth = 0;
1156     m_minHeight = 0;
1157     m_fixedWidth = 0;
1158     m_fixedHeight = 0;
1159
1160     // Find how long each stretch unit needs to be
1161     int stretchSize = 1;
1162     wxNode *node = m_children.GetFirst();
1163     while (node)
1164     {
1165         wxSizerItem *item = (wxSizerItem*) node->Data();
1166         if (item->IsShown() && item->GetOption() != 0)
1167         {
1168             int stretch = item->GetOption();
1169             wxSize size( item->CalcMin() );
1170             int sizePerStretch;
1171             // Integer division rounded up is (a + b - 1) / b
1172             if (m_orient == wxHORIZONTAL)
1173                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1174             else
1175                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1176             if (sizePerStretch > stretchSize)
1177                 stretchSize = sizePerStretch;
1178         }
1179         node = node->Next();
1180     }
1181     // Calculate overall minimum size
1182     node = m_children.GetFirst();
1183     while (node)
1184     {
1185         wxSizerItem *item = (wxSizerItem*) node->Data();
1186         if (item->IsShown())
1187         {
1188             m_stretchable += item->GetOption();
1189
1190             wxSize size( item->CalcMin() );
1191             if (item->GetOption() != 0)
1192             {
1193                 if (m_orient == wxHORIZONTAL)
1194                     size.x = stretchSize * item->GetOption();
1195                 else
1196                     size.y = stretchSize * item->GetOption();
1197             }
1198
1199             if (m_orient == wxHORIZONTAL)
1200             {
1201                 m_minWidth += size.x;
1202                 m_minHeight = wxMax( m_minHeight, size.y );
1203             }
1204             else
1205             {
1206                 m_minHeight += size.y;
1207                 m_minWidth = wxMax( m_minWidth, size.x );
1208             }
1209
1210             if (item->GetOption() == 0)
1211             {
1212                 if (m_orient == wxVERTICAL)
1213                 {
1214                     m_fixedHeight += size.y;
1215                     m_fixedWidth = wxMax( m_fixedWidth, size.x );
1216                 }
1217                 else
1218                 {
1219                     m_fixedWidth += size.x;
1220                     m_fixedHeight = wxMax( m_fixedHeight, size.y );
1221                 }
1222             }
1223         }
1224         node = node->Next();
1225     }
1226
1227     return wxSize( m_minWidth, m_minHeight );
1228 }
1229
1230 //---------------------------------------------------------------------------
1231 // wxStaticBoxSizer
1232 //---------------------------------------------------------------------------
1233
1234 #if wxUSE_STATBOX
1235
1236 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1237                 : wxBoxSizer( orient )
1238 {
1239     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1240
1241     m_staticBox = box;
1242 }
1243
1244 static void GetStaticBoxBorders(wxStaticBox *box,
1245                                 int *borderTop, int *borderOther)
1246 {
1247     // this has to be done platform by platform as there is no way to
1248     // guess the thickness of a wxStaticBox border
1249 #ifdef __WXGTK__
1250     if ( box->GetLabel().IsEmpty() )
1251         *borderTop = 5;
1252     else
1253 #endif // __WXGTK__
1254         *borderTop = 15;
1255     (void)box;
1256     *borderOther = 5;
1257 }
1258
1259 void wxStaticBoxSizer::RecalcSizes()
1260 {
1261     int top_border, other_border;
1262     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1263
1264     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1265
1266     wxPoint old_pos( m_position );
1267     m_position.x += other_border;
1268     m_position.y += top_border;
1269     wxSize old_size( m_size );
1270     m_size.x -= 2*other_border;
1271     m_size.y -= top_border + other_border;
1272
1273     wxBoxSizer::RecalcSizes();
1274
1275     m_position = old_pos;
1276     m_size = old_size;
1277 }
1278
1279 wxSize wxStaticBoxSizer::CalcMin()
1280 {
1281     int top_border, other_border;
1282     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1283
1284     wxSize ret( wxBoxSizer::CalcMin() );
1285     ret.x += 2*other_border;
1286     ret.y += other_border + top_border;
1287
1288     return ret;
1289 }
1290
1291 #endif // wxUSE_STATBOX
1292
1293 //---------------------------------------------------------------------------
1294 // wxNotebookSizer
1295 //---------------------------------------------------------------------------
1296
1297 #if wxUSE_NOTEBOOK
1298
1299 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1300 {
1301     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1302
1303     m_notebook = nb;
1304 }
1305
1306 void wxNotebookSizer::RecalcSizes()
1307 {
1308     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1309 }
1310
1311 wxSize wxNotebookSizer::CalcMin()
1312 {
1313     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1314
1315     sizeBorder.x += 5;
1316     sizeBorder.y += 5;
1317
1318     if (m_notebook->GetChildren().GetCount() == 0)
1319     {
1320         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1321     }
1322
1323     int maxX = 0;
1324     int maxY = 0;
1325
1326     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1327     while (node)
1328     {
1329         wxWindow *item = node->GetData();
1330         wxSizer *itemsizer = item->GetSizer();
1331
1332         if (itemsizer)
1333         {
1334             wxSize subsize( itemsizer->CalcMin() );
1335
1336             if (subsize.x > maxX)
1337                 maxX = subsize.x;
1338             if (subsize.y > maxY)
1339                 maxY = subsize.y;
1340         }
1341
1342         node = node->GetNext();
1343     }
1344
1345     return wxSize( maxX, maxY ) + sizeBorder;
1346 }
1347
1348 #endif // wxUSE_NOTEBOOK
1349
1350 // vi:sts=4:sw=4:et