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 //              (c) 2003, Ron Lee
  10 // Licence:     wxWindows licence
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifdef __GNUG__
  14 #pragma implementation "sizer.h"
  15 #endif
  16
  17 // For compilers that support precompilation, includes "wx.h".
  18 #include "wx/wxprec.h"
  19
  20 #ifdef __BORLANDC__
  21     #pragma hdrstop
  22 #endif
  23
  24 #include "wx/sizer.h"
  25 #include "wx/utils.h"
  26 #include "wx/statbox.h"
  27 #include "wx/notebook.h"
  28 #include <wx/listimpl.cpp>
  29
  30 //---------------------------------------------------------------------------
  31
  32 IMPLEMENT_ABSTRACT_CLASS(wxSizerItem, wxObject)
  33 IMPLEMENT_ABSTRACT_CLASS(wxSizer, wxObject)
  34 IMPLEMENT_ABSTRACT_CLASS(wxGridSizer, wxSizer)
  35 IMPLEMENT_ABSTRACT_CLASS(wxFlexGridSizer, wxGridSizer)
  36 IMPLEMENT_ABSTRACT_CLASS(wxBoxSizer, wxSizer)
  37 #if wxUSE_STATBOX
  38 IMPLEMENT_ABSTRACT_CLASS(wxStaticBoxSizer, wxBoxSizer)
  39 #endif
  40 #if wxUSE_NOTEBOOK
  41 IMPLEMENT_ABSTRACT_CLASS(wxNotebookSizer, wxSizer)
  42 #endif
  43
  44 WX_DEFINE_EXPORTED_LIST( wxSizerItemList );
  45
  46
  47 //---------------------------------------------------------------------------
  48 // wxSizerItem
  49 //---------------------------------------------------------------------------
  50
  51 wxSizerItem::wxSizerItem( int width, int height, int proportion, int flag, int border, wxObject* userData )
  52     : m_window( NULL )
  53     , m_sizer( NULL )
  54     , m_size( wxSize( width, height ) ) // size is set directly
  55     , m_minSize( m_size )               // minimal size is the initial size
  56     , m_proportion( proportion )
  57     , m_border( border )
  58     , m_flag( flag )
  59     , m_show( true )
  60     , m_userData( userData )
  61 {
  62     SetRatio( m_size );
  63 }
  64
  65 wxSizerItem::wxSizerItem( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
  66     : m_window( window )
  67     , m_sizer( NULL )
  68     , m_minSize( window->GetSize() )    // minimal size is the initial size
  69     , m_proportion( proportion )
  70     , m_border( border )
  71     , m_flag( flag )
  72     , m_show( true )
  73     , m_userData( userData )
  74 {
  75     // aspect ratio calculated from initial size
  76     SetRatio( m_minSize );
  77
  78     // m_size is calculated later
  79 }
  80
  81 wxSizerItem::wxSizerItem( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
  82     : m_window( NULL )
  83     , m_sizer( sizer )
  84     , m_proportion( proportion )
  85     , m_border( border )
  86     , m_flag( flag )
  87     , m_show( true )
  88     , m_ratio( 0.0 )
  89     , m_userData( userData )
  90 {
  91     // m_minSize is calculated later
  92     // m_size is calculated later
  93 }
  94
  95 wxSizerItem::~wxSizerItem()
  96 {
  97     if (m_userData)
  98         delete m_userData;
  99     if (m_sizer)
 100         delete m_sizer;
 101 }
 102
 103
 104 wxSize wxSizerItem::GetSize()
 105 {
 106     wxSize ret;
 107     if (IsSizer())
 108         ret = m_sizer->GetSize();
 109     else
 110     if (IsWindow())
 111         ret = m_window->GetSize();
 112     else ret = m_size;
 113
 114     if (m_flag & wxWEST)
 115         ret.x += m_border;
 116     if (m_flag & wxEAST)
 117         ret.x += m_border;
 118     if (m_flag & wxNORTH)
 119         ret.y += m_border;
 120     if (m_flag & wxSOUTH)
 121         ret.y += m_border;
 122
 123     return ret;
 124 }
 125
 126 wxSize wxSizerItem::CalcMin()
 127 {
 128     wxSize ret;
 129     if (IsSizer())
 130     {
 131         ret = m_sizer->GetMinSize();
 132
 133         // if we have to preserve aspect ratio _AND_ this is
 134         // the first-time calculation, consider ret to be initial size
 135         if ((m_flag & wxSHAPED) && !m_ratio)
 136             SetRatio(ret);
 137     }
 138     else
 139     {
 140         if ( IsWindow() && (m_flag & wxADJUST_MINSIZE) )
 141         {
 142             // By user request, keep the minimal size for this item
 143             // in sync with the largest of BestSize and any user supplied
 144             // minimum size hint.  Useful in cases where the item is
 145             // changeable -- static text labels, etc.
 146             m_minSize = m_window->GetAdjustedBestSize();
 147         }
 148
 149         ret = m_minSize;
 150     }
 151
 152     if (m_flag & wxWEST)
 153         ret.x += m_border;
 154     if (m_flag & wxEAST)
 155         ret.x += m_border;
 156     if (m_flag & wxNORTH)
 157         ret.y += m_border;
 158     if (m_flag & wxSOUTH)
 159         ret.y += m_border;
 160
 161     return ret;
 162 }
 163
 164 void wxSizerItem::SetDimension( wxPoint pos, wxSize size )
 165 {
 166     if (m_flag & wxSHAPED)
 167     {
 168         // adjust aspect ratio
 169         int rwidth = (int) (size.y * m_ratio);
 170         if (rwidth > size.x)
 171         {
 172             // fit horizontally
 173             int rheight = (int) (size.x / m_ratio);
 174             // add vertical space
 175             if (m_flag & wxALIGN_CENTER_VERTICAL)
 176                 pos.y += (size.y - rheight) / 2;
 177             else if (m_flag & wxALIGN_BOTTOM)
 178                 pos.y += (size.y - rheight);
 179             // use reduced dimensions
 180             size.y =rheight;
 181         }
 182         else if (rwidth < size.x)
 183         {
 184             // add horizontal space
 185             if (m_flag & wxALIGN_CENTER_HORIZONTAL)
 186                 pos.x += (size.x - rwidth) / 2;
 187             else if (m_flag & wxALIGN_RIGHT)
 188                 pos.x += (size.x - rwidth);
 189             size.x = rwidth;
 190         }
 191     }
 192
 193     // This is what GetPosition() returns. Since we calculate
 194     // borders afterwards, GetPosition() will be the left/top
 195     // corner of the surrounding border.
 196     m_pos = pos;
 197
 198     if (m_flag & wxWEST)
 199     {
 200         pos.x += m_border;
 201         size.x -= m_border;
 202     }
 203     if (m_flag & wxEAST)
 204     {
 205         size.x -= m_border;
 206     }
 207     if (m_flag & wxNORTH)
 208     {
 209         pos.y += m_border;
 210         size.y -= m_border;
 211     }
 212     if (m_flag & wxSOUTH)
 213     {
 214         size.y -= m_border;
 215     }
 216
 217     if (IsSizer())
 218         m_sizer->SetDimension( pos.x, pos.y, size.x, size.y );
 219
 220     if (IsWindow())
 221         m_window->SetSize( pos.x, pos.y, size.x, size.y, wxSIZE_ALLOW_MINUS_ONE );
 222
 223     m_size = size;
 224 }
 225
 226 void wxSizerItem::DeleteWindows()
 227 {
 228     if (m_window)
 229          m_window->Destroy();
 230
 231     if (m_sizer)
 232         m_sizer->DeleteWindows();
 233 }
 234
 235 bool wxSizerItem::IsWindow()
 236 {
 237     return (m_window != NULL);
 238 }
 239
 240 bool wxSizerItem::IsSizer()
 241 {
 242     return (m_sizer != NULL);
 243 }
 244
 245 bool wxSizerItem::IsSpacer()
 246 {
 247     return (m_window == NULL) && (m_sizer == NULL);
 248 }
 249
 250 void wxSizerItem::Show( bool show )
 251 {
 252     m_show = show;
 253
 254     if( IsWindow() )
 255         m_window->Show( show );
 256     else if( IsSizer() )
 257         m_sizer->ShowItems( show );
 258
 259     // ... nothing else to do to hide/show spacers
 260 }
 261
 262 void wxSizerItem::SetOption( int option )
 263 {
 264     SetProportion( option );
 265 }
 266
 267 int wxSizerItem::GetOption() const
 268 {
 269     return GetProportion();
 270 }
 271
 272
 273 //---------------------------------------------------------------------------
 274 // wxSizer
 275 //---------------------------------------------------------------------------
 276
 277 wxSizer::wxSizer()
 278     : m_minSize( wxSize( 0, 0 ) )
 279 {
 280     m_children.DeleteContents( true );
 281 }
 282
 283 wxSizer::~wxSizer()
 284 {
 285     Clear();
 286 }
 287
 288 void wxSizer::Add( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
 289 {
 290     m_children.Append( new wxSizerItem( window, proportion, flag, border, userData ) );
 291     window->SetContainingSizer( this );
 292 }
 293
 294 void wxSizer::Add( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
 295 {
 296     m_children.Append( new wxSizerItem( sizer, proportion, flag, border, userData ) );
 297 }
 298
 299 void wxSizer::Add( int width, int height, int proportion, int flag, int border, wxObject* userData )
 300 {
 301     m_children.Append( new wxSizerItem( width, height, proportion, flag, border, userData ) );
 302 }
 303
 304 void wxSizer::Add( wxSizerItem *item )
 305 {
 306     m_children.Append( item );
 307
 308     if( item->GetWindow() )
 309         item->GetWindow()->SetContainingSizer( this );
 310 }
 311
 312 void wxSizer::Prepend( wxWindow *window, int proportion, int flag, int border, wxObject* userData )
 313 {
 314     m_children.Insert( new wxSizerItem( window, proportion, flag, border, userData ) );
 315     window->SetContainingSizer( this );
 316 }
 317
 318 void wxSizer::Prepend( wxSizer *sizer, int proportion, int flag, int border, wxObject* userData )
 319 {
 320     m_children.Insert( new wxSizerItem( sizer, proportion, flag, border, userData ) );
 321 }
 322
 323 void wxSizer::Prepend( int width, int height, int proportion, int flag, int border, wxObject* userData )
 324 {
 325     m_children.Insert( new wxSizerItem( width, height, proportion, flag, border, userData ) );
 326 }
 327
 328 void wxSizer::Prepend( wxSizerItem *item )
 329 {
 330     m_children.Insert( item );
 331
 332     if( item->GetWindow() )
 333         item->GetWindow()->SetContainingSizer( this );
 334 }
 335
 336 void wxSizer::Insert( size_t index,
 337                       wxWindow *window,
 338                       int proportion,
 339                       int flag,
 340                       int border,
 341                       wxObject* userData )
 342 {
 343     m_children.Insert( index,
 344                        new wxSizerItem( window, proportion, flag, border, userData ) );
 345     window->SetContainingSizer( this );
 346 }
 347
 348 void wxSizer::Insert( size_t index,
 349                       wxSizer *sizer,
 350                       int proportion,
 351                       int flag,
 352                       int border,
 353                       wxObject* userData )
 354 {
 355     m_children.Insert( index,
 356                        new wxSizerItem( sizer, proportion, flag, border, userData ) );
 357 }
 358
 359 void wxSizer::Insert( size_t index,
 360                       int width,
 361                       int height,
 362                       int proportion,
 363                       int flag,
 364                       int border,
 365                       wxObject* userData )
 366 {
 367     m_children.Insert( index,
 368                        new wxSizerItem( width, height, proportion, flag, border, userData ) );
 369 }
 370
 371 void wxSizer::Insert( size_t index, wxSizerItem *item )
 372 {
 373     m_children.Insert( index, item );
 374
 375     if( item->GetWindow() )
 376         item->GetWindow()->SetContainingSizer( this );
 377 }
 378
 379 bool wxSizer::Remove( wxWindow *window )
 380 {
 381     return Detach( window );
 382 }
 383
 384 bool wxSizer::Remove( wxSizer *sizer )
 385 {
 386     wxASSERT_MSG( sizer, _T("Removing NULL sizer") );
 387
 388     wxSizerItemList::Node   *node = m_children.GetFirst();
 389     while (node)
 390     {
 391         wxSizerItem     *item = node->GetData();
 392
 393         if (item->GetSizer() == sizer)
 394             return m_children.DeleteNode( node );
 395
 396         node = node->GetNext();
 397     }
 398
 399     return false;
 400 }
 401
 402 bool wxSizer::Remove( size_t index )
 403 {
 404     wxCHECK_MSG( index < m_children.GetCount(),
 405                  false,
 406                  _T("Remove index is out of range") );
 407
 408     wxSizerItemList::Node   *node = m_children.Item( index );
 409
 410     wxCHECK_MSG( node, false, _T("Failed to find child node") );
 411
 412     return m_children.DeleteNode( node );
 413 }
 414
 415 bool wxSizer::Detach( wxSizer *sizer )
 416 {
 417     wxASSERT_MSG( sizer, _T("Detaching NULL sizer") );
 418
 419     wxSizerItemList::Node   *node = m_children.GetFirst();
 420     while (node)
 421     {
 422         wxSizerItem     *item = node->GetData();
 423
 424         if (item->GetSizer() == sizer)
 425         {
 426             item->DetachSizer();
 427             return m_children.DeleteNode( node );
 428         }
 429         node = node->GetNext();
 430     }
 431
 432     return false;
 433 }
 434
 435 bool wxSizer::Detach( wxWindow *window )
 436 {
 437     wxASSERT_MSG( window, _T("Detaching NULL window") );
 438
 439     wxSizerItemList::Node   *node = m_children.GetFirst();
 440     while (node)
 441     {
 442         wxSizerItem     *item = node->GetData();
 443
 444         if (item->GetWindow() == window)
 445         {
 446             item->GetWindow()->SetContainingSizer( NULL );
 447             return m_children.DeleteNode( node );
 448         }
 449         node = node->GetNext();
 450     }
 451
 452     return false;
 453 }
 454
 455 bool wxSizer::Detach( size_t index )
 456 {
 457     wxCHECK_MSG( index < m_children.GetCount(),
 458                  false,
 459                  _T("Detach index is out of range") );
 460
 461     wxSizerItemList::Node   *node = m_children.Item( index );
 462
 463     wxCHECK_MSG( node, false, _T("Failed to find child node") );
 464
 465     node->GetData()->DetachSizer();
 466
 467     return m_children.DeleteNode( node );
 468 }
 469
 470 void wxSizer::Clear( bool delete_windows )
 471 {
 472     // First clear the ContainingSizer pointers
 473     wxSizerItemList::Node   *node = m_children.GetFirst();
 474     while (node)
 475     {
 476         wxSizerItem     *item = node->GetData();
 477
 478         if (item->IsWindow())
 479             item->GetWindow()->SetContainingSizer( NULL );
 480         node = node->GetNext();
 481     }
 482
 483     // Destroy the windows if needed
 484     if (delete_windows)
 485         DeleteWindows();
 486
 487     // Now empty the list
 488     m_children.Clear();
 489 }
 490
 491 void wxSizer::DeleteWindows()
 492 {
 493     wxSizerItemList::Node   *node = m_children.GetFirst();
 494     while (node)
 495     {
 496         wxSizerItem     *item = node->GetData();
 497
 498         item->DeleteWindows();
 499         node = node->GetNext();
 500     }
 501 }
 502
 503 wxSize wxSizer::Fit( wxWindow *window )
 504 {
 505     wxSize size;
 506     if (window->IsTopLevel())
 507         size = FitSize( window );
 508     else
 509         size = GetMinWindowSize( window );
 510
 511     window->SetSize( size );
 512
 513     return size;
 514 }
 515
 516 void wxSizer::FitInside( wxWindow *window )
 517 {
 518     wxSize size;
 519     if (window->IsTopLevel())
 520         size = VirtualFitSize( window );
 521     else
 522         size = GetMinClientSize( window );
 523
 524     window->SetVirtualSize( size );
 525 }
 526
 527 void wxSizer::Layout()
 528 {
 529     CalcMin();
 530     RecalcSizes();
 531 }
 532
 533 void wxSizer::SetSizeHints( wxWindow *window )
 534 {
 535     // Preserve the window's max size hints, but set the
 536     // lower bound according to the sizer calculations.
 537
 538     wxSize size = Fit( window );
 539
 540     window->SetSizeHints( size.x,
 541                           size.y,
 542                           window->GetMaxWidth(),
 543                           window->GetMaxHeight() );
 544 }
 545
 546 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 547 {
 548     // Preserve the window's max size hints, but set the
 549     // lower bound according to the sizer calculations.
 550
 551     FitInside( window );
 552     wxSize size( window->GetVirtualSize() );
 553     window->SetVirtualSizeHints( size.x,
 554                                  size.y,
 555                                  window->GetMaxWidth(),
 556                                  window->GetMaxHeight() );
 557 }
 558
 559 wxSize wxSizer::GetMaxWindowSize( wxWindow *window )
 560 {
 561     return window->GetMaxSize();
 562 }
 563
 564 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 565 {
 566     wxSize      minSize( GetMinSize() );
 567     wxSize      size( window->GetSize() );
 568     wxSize      client_size( window->GetClientSize() );
 569
 570     return wxSize( minSize.x+size.x-client_size.x,
 571                    minSize.y+size.y-client_size.y );
 572 }
 573
 574 // Return a window size that will fit within the screens dimensions
 575 wxSize wxSizer::FitSize( wxWindow *window )
 576 {
 577     wxSize size     = GetMinWindowSize( window );
 578     wxSize sizeMax  = GetMaxWindowSize( window );
 579
 580     // Limit the size if sizeMax != wxDefaultSize
 581
 582     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 583         size.x = sizeMax.x;
 584     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 585         size.y = sizeMax.y;
 586
 587     return size;
 588 }
 589
 590 wxSize wxSizer::GetMaxClientSize( wxWindow *window )
 591 {
 592     wxSize maxSize( window->GetMaxSize() );
 593
 594     if( maxSize != wxDefaultSize )
 595     {
 596         wxSize size( window->GetSize() );
 597         wxSize client_size( window->GetClientSize() );
 598
 599         return wxSize( maxSize.x + client_size.x - size.x,
 600                        maxSize.y + client_size.y - size.y );
 601     }
 602     else
 603         return wxDefaultSize;
 604 }
 605
 606 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
 607 {
 608     return GetMinSize();  // Already returns client size.
 609 }
 610
 611 wxSize wxSizer::VirtualFitSize( wxWindow *window )
 612 {
 613     wxSize size     = GetMinClientSize( window );
 614     wxSize sizeMax  = GetMaxClientSize( window );
 615
 616     // Limit the size if sizeMax != wxDefaultSize
 617
 618     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 619         size.x = sizeMax.x;
 620     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 621         size.y = sizeMax.y;
 622
 623     return size;
 624 }
 625
 626 void wxSizer::SetDimension( int x, int y, int width, int height )
 627 {
 628     m_position.x = x;
 629     m_position.y = y;
 630     m_size.x = width;
 631     m_size.y = height;
 632     Layout();
 633 }
 634
 635 wxSize wxSizer::GetMinSize()
 636 {
 637     wxSize ret( CalcMin() );
 638     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 639     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 640     return ret;
 641 }
 642
 643 void wxSizer::DoSetMinSize( int width, int height )
 644 {
 645     m_minSize.x = width;
 646     m_minSize.y = height;
 647 }
 648
 649 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 650 {
 651     wxASSERT_MSG( window, _T("SetMinSize for NULL window") );
 652
 653     // Is it our immediate child?
 654
 655     wxSizerItemList::Node   *node = m_children.GetFirst();
 656     while (node)
 657     {
 658         wxSizerItem     *item = node->GetData();
 659
 660         if (item->GetWindow() == window)
 661         {
 662             item->SetInitSize( width, height );
 663             return true;
 664         }
 665         node = node->GetNext();
 666     }
 667
 668     // No?  Search any subsizers we own then
 669
 670     node = m_children.GetFirst();
 671     while (node)
 672     {
 673         wxSizerItem     *item = node->GetData();
 674
 675         if ( item->GetSizer() &&
 676              item->GetSizer()->DoSetItemMinSize( window, width, height ) )
 677         {
 678             // A child sizer found the requested windw, exit.
 679             return true;
 680         }
 681         node = node->GetNext();
 682     }
 683
 684     return false;
 685 }
 686
 687 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 688 {
 689     wxASSERT_MSG( sizer, _T("SetMinSize for NULL sizer") );
 690
 691     // Is it our immediate child?
 692
 693     wxSizerItemList::Node   *node = m_children.GetFirst();
 694     while (node)
 695     {
 696         wxSizerItem     *item = node->GetData();
 697
 698         if (item->GetSizer() == sizer)
 699         {
 700             item->GetSizer()->DoSetMinSize( width, height );
 701             return true;
 702         }
 703         node = node->GetNext();
 704     }
 705
 706     // No?  Search any subsizers we own then
 707
 708     node = m_children.GetFirst();
 709     while (node)
 710     {
 711         wxSizerItem     *item = node->GetData();
 712
 713         if ( item->GetSizer() &&
 714              item->GetSizer()->DoSetItemMinSize( sizer, width, height ) )
 715         {
 716             // A child found the requested sizer, exit.
 717             return true;
 718         }
 719         node = node->GetNext();
 720     }
 721
 722     return false;
 723 }
 724
 725 bool wxSizer::DoSetItemMinSize( size_t index, int width, int height )
 726 {
 727     wxSizerItemList::Node   *node = m_children.Item( index );
 728
 729     wxCHECK_MSG( node, false, _T("Failed to find child node") );
 730
 731     wxSizerItem     *item = node->GetData();
 732
 733     if (item->GetSizer())
 734     {
 735         // Sizers contains the minimal size in them, if not calculated ...
 736         item->GetSizer()->DoSetMinSize( width, height );
 737     }
 738     else
 739     {
 740         // ... but the minimal size of spacers and windows in stored in them
 741         item->SetInitSize( width, height );
 742     }
 743
 744     return true;
 745 }
 746
 747 void wxSizer::Show( wxWindow *window, bool show )
 748 {
 749     wxASSERT_MSG( window, _T("Show for NULL window") );
 750
 751     wxSizerItemList::Node   *node = m_children.GetFirst();
 752     while (node)
 753     {
 754         wxSizerItem     *item = node->GetData();
 755
 756         if (item->GetWindow() == window)
 757         {
 758             item->Show( show );
 759             break;
 760         }
 761         node = node->GetNext();
 762     }
 763 }
 764
 765 void wxSizer::Show( wxSizer *sizer, bool show )
 766 {
 767     wxASSERT_MSG( sizer, _T("Show for NULL sizer") );
 768
 769     wxSizerItemList::Node   *node = m_children.GetFirst();
 770     while (node)
 771     {
 772         wxSizerItem     *item = node->GetData();
 773
 774         if (item->GetSizer() == sizer)
 775         {
 776             item->Show( show );
 777             break;
 778         }
 779         node = node->GetNext();
 780     }
 781 }
 782
 783 void wxSizer::Show( size_t index, bool show )
 784 {
 785     wxCHECK_RET( index < m_children.GetCount(),
 786                  _T("Show index is out of range") );
 787
 788     m_children.Item( index )->GetData()->Show( show );
 789 }
 790
 791 void wxSizer::ShowItems( bool show )
 792 {
 793     wxSizerItemList::Node   *node = m_children.GetFirst();
 794     while (node)
 795     {
 796         node->GetData()->Show( show );
 797         node = node->GetNext();
 798     }
 799 }
 800
 801 bool wxSizer::IsShown( wxWindow *window )
 802 {
 803     wxSizerItemList::Node   *node = m_children.GetFirst();
 804     while (node)
 805     {
 806         wxSizerItem     *item = node->GetData();
 807
 808         if (item->GetWindow() == window)
 809         {
 810             return item->IsShown();
 811         }
 812         node = node->GetNext();
 813     }
 814
 815     wxFAIL_MSG( _T("IsShown failed to find sizer item") );
 816
 817     return false;
 818 }
 819
 820 bool wxSizer::IsShown( wxSizer *sizer )
 821 {
 822     wxSizerItemList::Node   *node = m_children.GetFirst();
 823     while (node)
 824     {
 825         wxSizerItem     *item = node->GetData();
 826
 827         if (item->GetSizer() == sizer)
 828         {
 829             return item->IsShown();
 830         }
 831         node = node->GetNext();
 832     }
 833
 834     wxFAIL_MSG( _T("IsShown failed to find sizer item") );
 835
 836     return false;
 837 }
 838
 839 bool wxSizer::IsShown( size_t index )
 840 {
 841     wxCHECK_MSG( index < m_children.GetCount(),
 842                  false,
 843                  _T("IsShown index is out of range") );
 844
 845     return m_children.Item( index )->GetData()->IsShown();
 846 }
 847
 848
 849 //---------------------------------------------------------------------------
 850 // wxGridSizer
 851 //---------------------------------------------------------------------------
 852
 853 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 854     : m_rows( rows )
 855     , m_cols( cols )
 856     , m_vgap( vgap )
 857     , m_hgap( hgap )
 858 {
 859 }
 860
 861 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 862     : m_rows( 0 )
 863     , m_cols( cols )
 864     , m_vgap( vgap )
 865     , m_hgap( hgap )
 866 {
 867 }
 868
 869 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
 870 {
 871     int nitems = m_children.GetCount();
 872     if ( nitems)
 873     {
 874         if ( m_cols )
 875         {
 876             ncols = m_cols;
 877             nrows = (nitems + m_cols - 1) / m_cols;
 878         }
 879         else if ( m_rows )
 880         {
 881             ncols = (nitems + m_rows - 1) / m_rows;
 882             nrows = m_rows;
 883         }
 884         else // 0 columns, 0 rows?
 885         {
 886             wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
 887
 888             nrows = ncols = 0;
 889         }
 890     }
 891
 892     return nitems;
 893 }
 894
 895 void wxGridSizer::RecalcSizes()
 896 {
 897     int nitems, nrows, ncols;
 898     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 899         return;
 900
 901     wxSize sz( GetSize() );
 902     wxPoint pt( GetPosition() );
 903
 904     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 905     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 906
 907     int x = pt.x;
 908     for (int c = 0; c < ncols; c++)
 909     {
 910         int y = pt.y;
 911         for (int r = 0; r < nrows; r++)
 912         {
 913             int i = r * ncols + c;
 914             if (i < nitems)
 915             {
 916                 wxSizerItemList::Node   *node = m_children.Item( i );
 917
 918                 wxASSERT_MSG( node, _T("Failed to find SizerItemList node") );
 919
 920                 SetItemBounds( node->GetData(), x, y, w, h);
 921             }
 922             y = y + h + m_vgap;
 923         }
 924         x = x + w + m_hgap;
 925     }
 926 }
 927
 928 wxSize wxGridSizer::CalcMin()
 929 {
 930     int nitems, nrows, ncols;
 931     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 932         return wxSize(10, 10);
 933
 934     // Find the max width and height for any component
 935     int w = 0;
 936     int h = 0;
 937
 938     wxSizerItemList::Node   *node = m_children.GetFirst();
 939     while (node)
 940     {
 941         wxSizerItem     *item = node->GetData();
 942         wxSize           sz( item->CalcMin() );
 943
 944         w = wxMax( w, sz.x );
 945         h = wxMax( h, sz.y );
 946
 947         node = node->GetNext();
 948     }
 949
 950     return wxSize( ncols * w + (ncols-1) * m_hgap,
 951                    nrows * h + (nrows-1) * m_vgap );
 952 }
 953
 954 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 955 {
 956     wxPoint pt( x,y );
 957     wxSize sz( item->CalcMin() );
 958     int flag = item->GetFlag();
 959
 960     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 961     {
 962        sz = wxSize(w, h);
 963     }
 964     else
 965     {
 966         if (flag & wxALIGN_CENTER_HORIZONTAL)
 967         {
 968             pt.x = x + (w - sz.x) / 2;
 969         }
 970         else if (flag & wxALIGN_RIGHT)
 971         {
 972             pt.x = x + (w - sz.x);
 973         }
 974
 975         if (flag & wxALIGN_CENTER_VERTICAL)
 976         {
 977             pt.y = y + (h - sz.y) / 2;
 978         }
 979         else if (flag & wxALIGN_BOTTOM)
 980         {
 981             pt.y = y + (h - sz.y);
 982         }
 983     }
 984
 985     item->SetDimension(pt, sz);
 986 }
 987
 988 //---------------------------------------------------------------------------
 989 // wxFlexGridSizer
 990 //---------------------------------------------------------------------------
 991
 992 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
 993    : wxGridSizer( rows, cols, vgap, hgap )
 994    , m_rowHeights( NULL )
 995    , m_colWidths( NULL )
 996 {
 997 }
 998
 999 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
1000    : wxGridSizer( cols, vgap, hgap )
1001    , m_rowHeights( NULL )
1002    , m_colWidths( NULL )
1003 {
1004 }
1005
1006 wxFlexGridSizer::~wxFlexGridSizer()
1007 {
1008     if (m_rowHeights)
1009         delete[] m_rowHeights;
1010     if (m_colWidths)
1011         delete[] m_colWidths;
1012 }
1013
1014 void wxFlexGridSizer::CreateArrays()
1015 {
1016     if (m_rowHeights)
1017         delete[] m_rowHeights;
1018     if (m_colWidths)
1019         delete[] m_colWidths;
1020
1021     int nitems, nrows, ncols;
1022     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1023     {
1024         m_rowHeights =
1025         m_colWidths = NULL;
1026     }
1027
1028     m_rowHeights = new int[nrows];
1029     m_colWidths = new int[ncols];
1030
1031     for (int col = 0; col < ncols; col++)
1032         m_colWidths[ col ] = 0;
1033     for (int row = 0; row < nrows; row++)
1034         m_rowHeights[ row ] = 0;
1035 }
1036
1037 void wxFlexGridSizer::RecalcSizes()
1038 {
1039     int nitems, nrows, ncols;
1040     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1041         return;
1042
1043     wxSize sz( GetSize() );
1044     wxSize minsz( CalcMin() );
1045     wxPoint pt( GetPosition() );
1046     int    delta;
1047     size_t idx,num;
1048     wxArrayInt temp;
1049
1050     // Transfer only those rows into temp which exist in the sizer
1051     // ignoring the superflouus ones. This prevents a segfault when
1052     // calling AddGrowableRow( 3 ) if the sizer only has 2 rows.
1053     for (idx = 0; idx < m_growableRows.GetCount(); idx++)
1054         if (m_growableRows[idx] < nrows)
1055             temp.Add( m_growableRows[idx] );
1056     num = temp.GetCount();
1057
1058     if ((num > 0) && (sz.y > minsz.y))
1059     {
1060         delta = (sz.y - minsz.y) / num;
1061         for (idx = 0; idx < num; idx++)
1062             m_rowHeights[ temp[idx] ] += delta;
1063     }
1064
1065     temp.Empty();
1066     // See above
1067     for (idx = 0; idx < m_growableCols.GetCount(); idx++)
1068         if (m_growableCols[idx] < ncols)
1069             temp.Add( m_growableCols[idx] );
1070     num = temp.GetCount();
1071
1072     if ((num > 0) && (sz.x > minsz.x))
1073     {
1074         delta = (sz.x - minsz.x) / num;
1075         for (idx = 0; idx < num; idx++)
1076             m_colWidths[ temp[idx] ] += delta;
1077     }
1078
1079     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
1080
1081     int x = pt.x;
1082     for (int c = 0; c < ncols; c++)
1083     {
1084         int y = pt.y;
1085         for (int r = 0; r < nrows; r++)
1086         {
1087             int i = r * ncols + c;
1088             if (i < nitems)
1089             {
1090                 wxSizerItemList::Node   *node = m_children.Item( i );
1091
1092                 wxASSERT_MSG( node, _T("Failed to find node") );
1093
1094                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
1095                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
1096
1097                 SetItemBounds( node->GetData(), x, y, w, h);
1098             }
1099             y = y + m_rowHeights[r] + m_vgap;
1100         }
1101         x = x + m_colWidths[c] + m_hgap;
1102     }
1103 }
1104
1105 wxSize wxFlexGridSizer::CalcMin()
1106 {
1107     int nitems, nrows, ncols;
1108     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1109         return wxSize(10,10);
1110
1111     CreateArrays();
1112
1113     int                      i = 0;
1114     wxSizerItemList::Node   *node = m_children.GetFirst();
1115
1116     while (node)
1117     {
1118         wxSizerItem    *item = node->GetData();
1119         wxSize          sz( item->CalcMin() );
1120         int             row = i / ncols;
1121         int             col = i % ncols;
1122
1123         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
1124         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
1125
1126         node = node->GetNext();
1127         i++;
1128     }
1129
1130     int width = 0;
1131     for (int col = 0; col < ncols; col++)
1132         width += m_colWidths[ col ];
1133
1134     int height = 0;
1135     for (int row = 0; row < nrows; row++)
1136         height += m_rowHeights[ row ];
1137
1138     return wxSize( width +  (ncols-1) * m_hgap,
1139                    height + (nrows-1) * m_vgap);
1140 }
1141
1142 void wxFlexGridSizer::AddGrowableRow( size_t idx )
1143 {
1144     m_growableRows.Add( idx );
1145 }
1146
1147 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
1148 {
1149 }
1150
1151 void wxFlexGridSizer::AddGrowableCol( size_t idx )
1152 {
1153     m_growableCols.Add( idx );
1154 }
1155
1156 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
1157 {
1158 }
1159
1160 //---------------------------------------------------------------------------
1161 // wxBoxSizer
1162 //---------------------------------------------------------------------------
1163
1164 wxBoxSizer::wxBoxSizer( int orient )
1165     : m_orient( orient )
1166 {
1167 }
1168
1169 void wxBoxSizer::RecalcSizes()
1170 {
1171     if (m_children.GetCount() == 0)
1172         return;
1173
1174     int delta = 0;
1175     int extra = 0;
1176     if (m_stretchable)
1177     {
1178         if (m_orient == wxHORIZONTAL)
1179         {
1180             delta = (m_size.x - m_fixedWidth) / m_stretchable;
1181             extra = (m_size.x - m_fixedWidth) % m_stretchable;
1182         }
1183         else
1184         {
1185             delta = (m_size.y - m_fixedHeight) / m_stretchable;
1186             extra = (m_size.y - m_fixedHeight) % m_stretchable;
1187         }
1188     }
1189
1190     wxPoint pt( m_position );
1191
1192     wxSizerItemList::Node   *node = m_children.GetFirst();
1193     while (node)
1194     {
1195         wxSizerItem     *item = node->GetData();
1196
1197         if (item->IsShown())
1198         {
1199             int weight = 1;
1200             if (item->GetProportion())
1201                 weight = item->GetProportion();
1202
1203             wxSize size( item->CalcMin() );
1204
1205             if (m_orient == wxVERTICAL)
1206             {
1207                 wxCoord height = size.y;
1208                 if (item->GetProportion())
1209                 {
1210                     height = (delta * weight) + extra;
1211                     extra = 0; // only the first item will get the remainder as extra size
1212                 }
1213
1214                 wxPoint child_pos( pt );
1215                 wxSize  child_size( wxSize( size.x, height) );
1216
1217                 if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1218                     child_size.x = m_size.x;
1219                 else if (item->GetFlag() & wxALIGN_RIGHT)
1220                     child_pos.x += m_size.x - size.x;
1221                 else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
1222                 // XXX wxCENTER is added for backward compatibility;
1223                 //     wxALIGN_CENTER should be used in new code
1224                     child_pos.x += (m_size.x - size.x) / 2;
1225
1226                 item->SetDimension( child_pos, child_size );
1227
1228                 pt.y += height;
1229             }
1230             else
1231             {
1232                 wxCoord width = size.x;
1233                 if (item->GetProportion())
1234                 {
1235                     width = (delta * weight) + extra;
1236                     extra = 0; // only the first item will get the remainder as extra size
1237                 }
1238
1239                 wxPoint child_pos( pt );
1240                 wxSize  child_size( wxSize(width, size.y) );
1241
1242                 if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1243                     child_size.y = m_size.y;
1244                 else if (item->GetFlag() & wxALIGN_BOTTOM)
1245                     child_pos.y += m_size.y - size.y;
1246                 else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
1247                 // XXX wxCENTER is added for backward compatibility;
1248                 //     wxALIGN_CENTER should be used in new code
1249                     child_pos.y += (m_size.y - size.y) / 2;
1250
1251                 item->SetDimension( child_pos, child_size );
1252
1253                 pt.x += width;
1254             }
1255         }
1256
1257         node = node->GetNext();
1258     }
1259 }
1260
1261 wxSize wxBoxSizer::CalcMin()
1262 {
1263     if (m_children.GetCount() == 0)
1264         return wxSize(10,10);
1265
1266     m_stretchable = 0;
1267     m_minWidth = 0;
1268     m_minHeight = 0;
1269     m_fixedWidth = 0;
1270     m_fixedHeight = 0;
1271
1272     // Find how long each stretch unit needs to be
1273     int                      stretchSize = 1;
1274     wxSizerItemList::Node   *node = m_children.GetFirst();
1275
1276     while (node)
1277     {
1278         wxSizerItem     *item = node->GetData();
1279
1280         if (item->IsShown() && item->GetProportion() != 0)
1281         {
1282             int stretch = item->GetProportion();
1283             wxSize size( item->CalcMin() );
1284             int sizePerStretch;
1285             // Integer division rounded up is (a + b - 1) / b
1286             if (m_orient == wxHORIZONTAL)
1287                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1288             else
1289                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1290             if (sizePerStretch > stretchSize)
1291                 stretchSize = sizePerStretch;
1292         }
1293         node = node->GetNext();
1294     }
1295
1296     // Calculate overall minimum size
1297     node = m_children.GetFirst();
1298     while (node)
1299     {
1300         wxSizerItem     *item = node->GetData();
1301
1302         if (item->IsShown())
1303         {
1304             m_stretchable += item->GetProportion();
1305
1306             wxSize size( item->CalcMin() );
1307             if (item->GetProportion() != 0)
1308             {
1309                 if (m_orient == wxHORIZONTAL)
1310                     size.x = stretchSize * item->GetProportion();
1311                 else
1312                     size.y = stretchSize * item->GetProportion();
1313             }
1314
1315             if (m_orient == wxHORIZONTAL)
1316             {
1317                 m_minWidth += size.x;
1318                 m_minHeight = wxMax( m_minHeight, size.y );
1319             }
1320             else
1321             {
1322                 m_minHeight += size.y;
1323                 m_minWidth = wxMax( m_minWidth, size.x );
1324             }
1325
1326             if (item->GetProportion() == 0)
1327             {
1328                 if (m_orient == wxVERTICAL)
1329                 {
1330                     m_fixedHeight += size.y;
1331                     m_fixedWidth = wxMax( m_fixedWidth, size.x );
1332                 }
1333                 else
1334                 {
1335                     m_fixedWidth += size.x;
1336                     m_fixedHeight = wxMax( m_fixedHeight, size.y );
1337                 }
1338             }
1339         }
1340         node = node->GetNext();
1341     }
1342
1343     return wxSize( m_minWidth, m_minHeight );
1344 }
1345
1346 //---------------------------------------------------------------------------
1347 // wxStaticBoxSizer
1348 //---------------------------------------------------------------------------
1349
1350 #if wxUSE_STATBOX
1351
1352 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1353     : wxBoxSizer( orient )
1354     , m_staticBox( box )
1355 {
1356     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1357 }
1358
1359 static void GetStaticBoxBorders( wxStaticBox *box,
1360                                  int *borderTop,
1361                                  int *borderOther)
1362 {
1363     // this has to be done platform by platform as there is no way to
1364     // guess the thickness of a wxStaticBox border
1365 #ifdef __WXGTK__
1366     if ( box->GetLabel().IsEmpty() )
1367         *borderTop = 5;
1368     else
1369 #endif // __WXGTK__
1370         *borderTop = 15;
1371     (void)box;
1372     *borderOther = 5;
1373 }
1374
1375 void wxStaticBoxSizer::RecalcSizes()
1376 {
1377     int top_border, other_border;
1378     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1379
1380     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1381
1382     wxPoint old_pos( m_position );
1383     m_position.x += other_border;
1384     m_position.y += top_border;
1385     wxSize old_size( m_size );
1386     m_size.x -= 2*other_border;
1387     m_size.y -= top_border + other_border;
1388
1389     wxBoxSizer::RecalcSizes();
1390
1391     m_position = old_pos;
1392     m_size = old_size;
1393 }
1394
1395 wxSize wxStaticBoxSizer::CalcMin()
1396 {
1397     int top_border, other_border;
1398     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1399
1400     wxSize ret( wxBoxSizer::CalcMin() );
1401     ret.x += 2*other_border;
1402     ret.y += other_border + top_border;
1403
1404     return ret;
1405 }
1406
1407 #endif // wxUSE_STATBOX
1408
1409 //---------------------------------------------------------------------------
1410 // wxNotebookSizer
1411 //---------------------------------------------------------------------------
1412
1413 #if wxUSE_NOTEBOOK
1414
1415 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1416     : m_notebook( nb )
1417 {
1418     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1419 }
1420
1421 void wxNotebookSizer::RecalcSizes()
1422 {
1423     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1424 }
1425
1426 wxSize wxNotebookSizer::CalcMin()
1427 {
1428     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1429
1430     sizeBorder.x += 5;
1431     sizeBorder.y += 5;
1432
1433     if (m_notebook->GetChildren().GetCount() == 0)
1434     {
1435         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1436     }
1437
1438     int maxX = 0;
1439     int maxY = 0;
1440
1441     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1442     while (node)
1443     {
1444         wxWindow *item = node->GetData();
1445         wxSizer *itemsizer = item->GetSizer();
1446
1447         if (itemsizer)
1448         {
1449             wxSize subsize( itemsizer->CalcMin() );
1450
1451             if (subsize.x > maxX)
1452                 maxX = subsize.x;
1453             if (subsize.y > maxY)
1454                 maxY = subsize.y;
1455         }
1456
1457         node = node->GetNext();
1458     }
1459
1460     return wxSize( maxX, maxY ) + sizeBorder;
1461 }
1462
1463 #endif // wxUSE_NOTEBOOK
1464
1465 // vi:sts=4:sw=4:et