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_CLASS(wxSizerItem, wxObject)
  33 IMPLEMENT_CLASS(wxSizer, wxObject)
  34 IMPLEMENT_CLASS(wxGridSizer, wxSizer)
  35 IMPLEMENT_CLASS(wxFlexGridSizer, wxGridSizer)
  36 IMPLEMENT_CLASS(wxBoxSizer, wxSizer)
  37 #if wxUSE_STATBOX
  38 IMPLEMENT_CLASS(wxStaticBoxSizer, wxBoxSizer)
  39 #endif
  40 #if wxUSE_NOTEBOOK
  41 IMPLEMENT_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() const
 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() const
 236 {
 237     return (m_window != NULL);
 238 }
 239
 240 bool wxSizerItem::IsSizer() const
 241 {
 242     return (m_sizer != NULL);
 243 }
 244
 245 bool wxSizerItem::IsSpacer() const
 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     wxSizerItem     *item = node->GetData();
 413
 414     if( item->IsWindow() )
 415         item->GetWindow()->SetContainingSizer( NULL );
 416
 417     return m_children.DeleteNode( node );
 418 }
 419
 420 bool wxSizer::Detach( wxSizer *sizer )
 421 {
 422     wxASSERT_MSG( sizer, _T("Detaching NULL sizer") );
 423
 424     wxSizerItemList::Node   *node = m_children.GetFirst();
 425     while (node)
 426     {
 427         wxSizerItem     *item = node->GetData();
 428
 429         if (item->GetSizer() == sizer)
 430         {
 431             item->DetachSizer();
 432             return m_children.DeleteNode( node );
 433         }
 434         node = node->GetNext();
 435     }
 436
 437     return false;
 438 }
 439
 440 bool wxSizer::Detach( wxWindow *window )
 441 {
 442     wxASSERT_MSG( window, _T("Detaching NULL window") );
 443
 444     wxSizerItemList::Node   *node = m_children.GetFirst();
 445     while (node)
 446     {
 447         wxSizerItem     *item = node->GetData();
 448
 449         if (item->GetWindow() == window)
 450         {
 451             item->GetWindow()->SetContainingSizer( NULL );
 452             return m_children.DeleteNode( node );
 453         }
 454         node = node->GetNext();
 455     }
 456
 457     return false;
 458 }
 459
 460 bool wxSizer::Detach( size_t index )
 461 {
 462     wxCHECK_MSG( index < m_children.GetCount(),
 463                  false,
 464                  _T("Detach index is out of range") );
 465
 466     wxSizerItemList::Node   *node = m_children.Item( index );
 467
 468     wxCHECK_MSG( node, false, _T("Failed to find child node") );
 469
 470     wxSizerItem     *item = node->GetData();
 471
 472     if( item->IsSizer() )
 473         item->DetachSizer();
 474     else if( item->IsWindow() )
 475         item->GetWindow()->SetContainingSizer( NULL );
 476
 477     return m_children.DeleteNode( node );
 478 }
 479
 480 void wxSizer::Clear( bool delete_windows )
 481 {
 482     // First clear the ContainingSizer pointers
 483     wxSizerItemList::Node   *node = m_children.GetFirst();
 484     while (node)
 485     {
 486         wxSizerItem     *item = node->GetData();
 487
 488         if (item->IsWindow())
 489             item->GetWindow()->SetContainingSizer( NULL );
 490         node = node->GetNext();
 491     }
 492
 493     // Destroy the windows if needed
 494     if (delete_windows)
 495         DeleteWindows();
 496
 497     // Now empty the list
 498     m_children.Clear();
 499 }
 500
 501 void wxSizer::DeleteWindows()
 502 {
 503     wxSizerItemList::Node   *node = m_children.GetFirst();
 504     while (node)
 505     {
 506         wxSizerItem     *item = node->GetData();
 507
 508         item->DeleteWindows();
 509         node = node->GetNext();
 510     }
 511 }
 512
 513 wxSize wxSizer::Fit( wxWindow *window )
 514 {
 515     wxSize size;
 516     if (window->IsTopLevel())
 517         size = FitSize( window );
 518     else
 519         size = GetMinWindowSize( window );
 520
 521     window->SetSize( size );
 522
 523     return size;
 524 }
 525
 526 void wxSizer::FitInside( wxWindow *window )
 527 {
 528     wxSize size;
 529     if (window->IsTopLevel())
 530         size = VirtualFitSize( window );
 531     else
 532         size = GetMinClientSize( window );
 533
 534     window->SetVirtualSize( size );
 535 }
 536
 537 void wxSizer::Layout()
 538 {
 539     CalcMin();
 540     RecalcSizes();
 541 }
 542
 543 void wxSizer::SetSizeHints( wxWindow *window )
 544 {
 545     // Preserve the window's max size hints, but set the
 546     // lower bound according to the sizer calculations.
 547
 548     wxSize size = Fit( window );
 549
 550     window->SetSizeHints( size.x,
 551                           size.y,
 552                           window->GetMaxWidth(),
 553                           window->GetMaxHeight() );
 554 }
 555
 556 void wxSizer::SetVirtualSizeHints( wxWindow *window )
 557 {
 558     // Preserve the window's max size hints, but set the
 559     // lower bound according to the sizer calculations.
 560
 561     FitInside( window );
 562     wxSize size( window->GetVirtualSize() );
 563     window->SetVirtualSizeHints( size.x,
 564                                  size.y,
 565                                  window->GetMaxWidth(),
 566                                  window->GetMaxHeight() );
 567 }
 568
 569 wxSize wxSizer::GetMaxWindowSize( wxWindow *window ) const
 570 {
 571     return window->GetMaxSize();
 572 }
 573
 574 wxSize wxSizer::GetMinWindowSize( wxWindow *window )
 575 {
 576     wxSize      minSize( GetMinSize() );
 577     wxSize      size( window->GetSize() );
 578     wxSize      client_size( window->GetClientSize() );
 579
 580     return wxSize( minSize.x+size.x-client_size.x,
 581                    minSize.y+size.y-client_size.y );
 582 }
 583
 584 // Return a window size that will fit within the screens dimensions
 585 wxSize wxSizer::FitSize( wxWindow *window )
 586 {
 587     wxSize size     = GetMinWindowSize( window );
 588     wxSize sizeMax  = GetMaxWindowSize( window );
 589
 590     // Limit the size if sizeMax != wxDefaultSize
 591
 592     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 593         size.x = sizeMax.x;
 594     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 595         size.y = sizeMax.y;
 596
 597     return size;
 598 }
 599
 600 wxSize wxSizer::GetMaxClientSize( wxWindow *window ) const
 601 {
 602     wxSize maxSize( window->GetMaxSize() );
 603
 604     if( maxSize != wxDefaultSize )
 605     {
 606         wxSize size( window->GetSize() );
 607         wxSize client_size( window->GetClientSize() );
 608
 609         return wxSize( maxSize.x + client_size.x - size.x,
 610                        maxSize.y + client_size.y - size.y );
 611     }
 612     else
 613         return wxDefaultSize;
 614 }
 615
 616 wxSize wxSizer::GetMinClientSize( wxWindow *WXUNUSED(window) )
 617 {
 618     return GetMinSize();  // Already returns client size.
 619 }
 620
 621 wxSize wxSizer::VirtualFitSize( wxWindow *window )
 622 {
 623     wxSize size     = GetMinClientSize( window );
 624     wxSize sizeMax  = GetMaxClientSize( window );
 625
 626     // Limit the size if sizeMax != wxDefaultSize
 627
 628     if ( size.x > sizeMax.x && sizeMax.x != -1 )
 629         size.x = sizeMax.x;
 630     if ( size.y > sizeMax.y && sizeMax.y != -1 )
 631         size.y = sizeMax.y;
 632
 633     return size;
 634 }
 635
 636 void wxSizer::SetDimension( int x, int y, int width, int height )
 637 {
 638     m_position.x = x;
 639     m_position.y = y;
 640     m_size.x = width;
 641     m_size.y = height;
 642     Layout();
 643 }
 644
 645 wxSize wxSizer::GetMinSize()
 646 {
 647     wxSize ret( CalcMin() );
 648     if (ret.x < m_minSize.x) ret.x = m_minSize.x;
 649     if (ret.y < m_minSize.y) ret.y = m_minSize.y;
 650     return ret;
 651 }
 652
 653 void wxSizer::DoSetMinSize( int width, int height )
 654 {
 655     m_minSize.x = width;
 656     m_minSize.y = height;
 657 }
 658
 659 bool wxSizer::DoSetItemMinSize( wxWindow *window, int width, int height )
 660 {
 661     wxASSERT_MSG( window, _T("SetMinSize for NULL window") );
 662
 663     // Is it our immediate child?
 664
 665     wxSizerItemList::Node   *node = m_children.GetFirst();
 666     while (node)
 667     {
 668         wxSizerItem     *item = node->GetData();
 669
 670         if (item->GetWindow() == window)
 671         {
 672             item->SetInitSize( width, height );
 673             return true;
 674         }
 675         node = node->GetNext();
 676     }
 677
 678     // No?  Search any subsizers we own then
 679
 680     node = m_children.GetFirst();
 681     while (node)
 682     {
 683         wxSizerItem     *item = node->GetData();
 684
 685         if ( item->GetSizer() &&
 686              item->GetSizer()->DoSetItemMinSize( window, width, height ) )
 687         {
 688             // A child sizer found the requested windw, exit.
 689             return true;
 690         }
 691         node = node->GetNext();
 692     }
 693
 694     return false;
 695 }
 696
 697 bool wxSizer::DoSetItemMinSize( wxSizer *sizer, int width, int height )
 698 {
 699     wxASSERT_MSG( sizer, _T("SetMinSize for NULL sizer") );
 700
 701     // Is it our immediate child?
 702
 703     wxSizerItemList::Node   *node = m_children.GetFirst();
 704     while (node)
 705     {
 706         wxSizerItem     *item = node->GetData();
 707
 708         if (item->GetSizer() == sizer)
 709         {
 710             item->GetSizer()->DoSetMinSize( width, height );
 711             return true;
 712         }
 713         node = node->GetNext();
 714     }
 715
 716     // No?  Search any subsizers we own then
 717
 718     node = m_children.GetFirst();
 719     while (node)
 720     {
 721         wxSizerItem     *item = node->GetData();
 722
 723         if ( item->GetSizer() &&
 724              item->GetSizer()->DoSetItemMinSize( sizer, width, height ) )
 725         {
 726             // A child found the requested sizer, exit.
 727             return true;
 728         }
 729         node = node->GetNext();
 730     }
 731
 732     return false;
 733 }
 734
 735 bool wxSizer::DoSetItemMinSize( size_t index, int width, int height )
 736 {
 737     wxSizerItemList::Node   *node = m_children.Item( index );
 738
 739     wxCHECK_MSG( node, false, _T("Failed to find child node") );
 740
 741     wxSizerItem     *item = node->GetData();
 742
 743     if (item->GetSizer())
 744     {
 745         // Sizers contains the minimal size in them, if not calculated ...
 746         item->GetSizer()->DoSetMinSize( width, height );
 747     }
 748     else
 749     {
 750         // ... but the minimal size of spacers and windows in stored in them
 751         item->SetInitSize( width, height );
 752     }
 753
 754     return true;
 755 }
 756
 757 void wxSizer::Show( wxWindow *window, bool show )
 758 {
 759     wxASSERT_MSG( window, _T("Show for NULL window") );
 760
 761     wxSizerItemList::Node   *node = m_children.GetFirst();
 762     while (node)
 763     {
 764         wxSizerItem     *item = node->GetData();
 765
 766         if (item->GetWindow() == window)
 767         {
 768             item->Show( show );
 769             break;
 770         }
 771         node = node->GetNext();
 772     }
 773 }
 774
 775 void wxSizer::Show( wxSizer *sizer, bool show )
 776 {
 777     wxASSERT_MSG( sizer, _T("Show for NULL sizer") );
 778
 779     wxSizerItemList::Node   *node = m_children.GetFirst();
 780     while (node)
 781     {
 782         wxSizerItem     *item = node->GetData();
 783
 784         if (item->GetSizer() == sizer)
 785         {
 786             item->Show( show );
 787             break;
 788         }
 789         node = node->GetNext();
 790     }
 791 }
 792
 793 void wxSizer::Show( size_t index, bool show )
 794 {
 795     wxCHECK_RET( index < m_children.GetCount(),
 796                  _T("Show index is out of range") );
 797
 798     m_children.Item( index )->GetData()->Show( show );
 799 }
 800
 801 void wxSizer::ShowItems( bool show )
 802 {
 803     wxSizerItemList::Node   *node = m_children.GetFirst();
 804     while (node)
 805     {
 806         node->GetData()->Show( show );
 807         node = node->GetNext();
 808     }
 809 }
 810
 811 bool wxSizer::IsShown( wxWindow *window ) const
 812 {
 813     wxSizerItemList::Node   *node = m_children.GetFirst();
 814     while (node)
 815     {
 816         wxSizerItem     *item = node->GetData();
 817
 818         if (item->GetWindow() == window)
 819         {
 820             return item->IsShown();
 821         }
 822         node = node->GetNext();
 823     }
 824
 825     wxFAIL_MSG( _T("IsShown failed to find sizer item") );
 826
 827     return false;
 828 }
 829
 830 bool wxSizer::IsShown( wxSizer *sizer ) const
 831 {
 832     wxSizerItemList::Node   *node = m_children.GetFirst();
 833     while (node)
 834     {
 835         wxSizerItem     *item = node->GetData();
 836
 837         if (item->GetSizer() == sizer)
 838         {
 839             return item->IsShown();
 840         }
 841         node = node->GetNext();
 842     }
 843
 844     wxFAIL_MSG( _T("IsShown failed to find sizer item") );
 845
 846     return false;
 847 }
 848
 849 bool wxSizer::IsShown( size_t index ) const
 850 {
 851     wxCHECK_MSG( index < m_children.GetCount(),
 852                  false,
 853                  _T("IsShown index is out of range") );
 854
 855     return m_children.Item( index )->GetData()->IsShown();
 856 }
 857
 858
 859 //---------------------------------------------------------------------------
 860 // wxGridSizer
 861 //---------------------------------------------------------------------------
 862
 863 wxGridSizer::wxGridSizer( int rows, int cols, int vgap, int hgap )
 864     : m_rows( rows )
 865     , m_cols( cols )
 866     , m_vgap( vgap )
 867     , m_hgap( hgap )
 868 {
 869 }
 870
 871 wxGridSizer::wxGridSizer( int cols, int vgap, int hgap )
 872     : m_rows( 0 )
 873     , m_cols( cols )
 874     , m_vgap( vgap )
 875     , m_hgap( hgap )
 876 {
 877 }
 878
 879 int wxGridSizer::CalcRowsCols(int& nrows, int& ncols) const
 880 {
 881     int nitems = m_children.GetCount();
 882     if ( nitems)
 883     {
 884         if ( m_cols )
 885         {
 886             ncols = m_cols;
 887             nrows = (nitems + m_cols - 1) / m_cols;
 888         }
 889         else if ( m_rows )
 890         {
 891             ncols = (nitems + m_rows - 1) / m_rows;
 892             nrows = m_rows;
 893         }
 894         else // 0 columns, 0 rows?
 895         {
 896             wxFAIL_MSG( _T("grid sizer must have either rows or columns fixed") );
 897
 898             nrows = ncols = 0;
 899         }
 900     }
 901
 902     return nitems;
 903 }
 904
 905 void wxGridSizer::RecalcSizes()
 906 {
 907     int nitems, nrows, ncols;
 908     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 909         return;
 910
 911     wxSize sz( GetSize() );
 912     wxPoint pt( GetPosition() );
 913
 914     int w = (sz.x - (ncols - 1) * m_hgap) / ncols;
 915     int h = (sz.y - (nrows - 1) * m_vgap) / nrows;
 916
 917     int x = pt.x;
 918     for (int c = 0; c < ncols; c++)
 919     {
 920         int y = pt.y;
 921         for (int r = 0; r < nrows; r++)
 922         {
 923             int i = r * ncols + c;
 924             if (i < nitems)
 925             {
 926                 wxSizerItemList::Node   *node = m_children.Item( i );
 927
 928                 wxASSERT_MSG( node, _T("Failed to find SizerItemList node") );
 929
 930                 SetItemBounds( node->GetData(), x, y, w, h);
 931             }
 932             y = y + h + m_vgap;
 933         }
 934         x = x + w + m_hgap;
 935     }
 936 }
 937
 938 wxSize wxGridSizer::CalcMin()
 939 {
 940     int nitems, nrows, ncols;
 941     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
 942         return wxSize(10, 10);
 943
 944     // Find the max width and height for any component
 945     int w = 0;
 946     int h = 0;
 947
 948     wxSizerItemList::Node   *node = m_children.GetFirst();
 949     while (node)
 950     {
 951         wxSizerItem     *item = node->GetData();
 952         wxSize           sz( item->CalcMin() );
 953
 954         w = wxMax( w, sz.x );
 955         h = wxMax( h, sz.y );
 956
 957         node = node->GetNext();
 958     }
 959
 960     return wxSize( ncols * w + (ncols-1) * m_hgap,
 961                    nrows * h + (nrows-1) * m_vgap );
 962 }
 963
 964 void wxGridSizer::SetItemBounds( wxSizerItem *item, int x, int y, int w, int h )
 965 {
 966     wxPoint pt( x,y );
 967     wxSize sz( item->CalcMin() );
 968     int flag = item->GetFlag();
 969
 970     if ((flag & wxEXPAND) || (flag & wxSHAPED))
 971     {
 972        sz = wxSize(w, h);
 973     }
 974     else
 975     {
 976         if (flag & wxALIGN_CENTER_HORIZONTAL)
 977         {
 978             pt.x = x + (w - sz.x) / 2;
 979         }
 980         else if (flag & wxALIGN_RIGHT)
 981         {
 982             pt.x = x + (w - sz.x);
 983         }
 984
 985         if (flag & wxALIGN_CENTER_VERTICAL)
 986         {
 987             pt.y = y + (h - sz.y) / 2;
 988         }
 989         else if (flag & wxALIGN_BOTTOM)
 990         {
 991             pt.y = y + (h - sz.y);
 992         }
 993     }
 994
 995     item->SetDimension(pt, sz);
 996 }
 997
 998 //---------------------------------------------------------------------------
 999 // wxFlexGridSizer
1000 //---------------------------------------------------------------------------
1001
1002 wxFlexGridSizer::wxFlexGridSizer( int rows, int cols, int vgap, int hgap )
1003    : wxGridSizer( rows, cols, vgap, hgap )
1004    , m_rowHeights( NULL )
1005    , m_colWidths( NULL )
1006 {
1007 }
1008
1009 wxFlexGridSizer::wxFlexGridSizer( int cols, int vgap, int hgap )
1010    : wxGridSizer( cols, vgap, hgap )
1011    , m_rowHeights( NULL )
1012    , m_colWidths( NULL )
1013 {
1014 }
1015
1016 wxFlexGridSizer::~wxFlexGridSizer()
1017 {
1018     if (m_rowHeights)
1019         delete[] m_rowHeights;
1020     if (m_colWidths)
1021         delete[] m_colWidths;
1022 }
1023
1024 void wxFlexGridSizer::CreateArrays()
1025 {
1026     if (m_rowHeights)
1027         delete[] m_rowHeights;
1028     if (m_colWidths)
1029         delete[] m_colWidths;
1030
1031     int nitems, nrows, ncols;
1032     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1033     {
1034         m_rowHeights =
1035         m_colWidths = NULL;
1036     }
1037
1038     m_rowHeights = new int[nrows];
1039     m_colWidths = new int[ncols];
1040
1041     for (int col = 0; col < ncols; col++)
1042         m_colWidths[ col ] = 0;
1043     for (int row = 0; row < nrows; row++)
1044         m_rowHeights[ row ] = 0;
1045 }
1046
1047 void wxFlexGridSizer::RecalcSizes()
1048 {
1049     int nitems, nrows, ncols;
1050     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1051         return;
1052
1053     wxSize sz( GetSize() );
1054     wxSize minsz( CalcMin() );
1055     wxPoint pt( GetPosition() );
1056     int    delta;
1057     size_t idx,num;
1058     wxArrayInt temp;
1059
1060     // Transfer only those rows into temp which exist in the sizer
1061     // ignoring the superflouus ones. This prevents a segfault when
1062     // calling AddGrowableRow( 3 ) if the sizer only has 2 rows.
1063     for (idx = 0; idx < m_growableRows.GetCount(); idx++)
1064         if (m_growableRows[idx] < nrows)
1065             temp.Add( m_growableRows[idx] );
1066     num = temp.GetCount();
1067
1068     if ((num > 0) && (sz.y > minsz.y))
1069     {
1070         delta = (sz.y - minsz.y) / num;
1071         for (idx = 0; idx < num; idx++)
1072             m_rowHeights[ temp[idx] ] += delta;
1073     }
1074
1075     temp.Empty();
1076     // See above
1077     for (idx = 0; idx < m_growableCols.GetCount(); idx++)
1078         if (m_growableCols[idx] < ncols)
1079             temp.Add( m_growableCols[idx] );
1080     num = temp.GetCount();
1081
1082     if ((num > 0) && (sz.x > minsz.x))
1083     {
1084         delta = (sz.x - minsz.x) / num;
1085         for (idx = 0; idx < num; idx++)
1086             m_colWidths[ temp[idx] ] += delta;
1087     }
1088
1089     sz = wxSize( pt.x + sz.x, pt.y + sz.y );
1090
1091     int x = pt.x;
1092     for (int c = 0; c < ncols; c++)
1093     {
1094         int y = pt.y;
1095         for (int r = 0; r < nrows; r++)
1096         {
1097             int i = r * ncols + c;
1098             if (i < nitems)
1099             {
1100                 wxSizerItemList::Node   *node = m_children.Item( i );
1101
1102                 wxASSERT_MSG( node, _T("Failed to find node") );
1103
1104                 int w = wxMax( 0, wxMin( m_colWidths[c], sz.x - x ) );
1105                 int h = wxMax( 0, wxMin( m_rowHeights[r], sz.y - y ) );
1106
1107                 SetItemBounds( node->GetData(), x, y, w, h);
1108             }
1109             y = y + m_rowHeights[r] + m_vgap;
1110         }
1111         x = x + m_colWidths[c] + m_hgap;
1112     }
1113 }
1114
1115 wxSize wxFlexGridSizer::CalcMin()
1116 {
1117     int nitems, nrows, ncols;
1118     if ( (nitems = CalcRowsCols(nrows, ncols)) == 0 )
1119         return wxSize(10,10);
1120
1121     CreateArrays();
1122
1123     int                      i = 0;
1124     wxSizerItemList::Node   *node = m_children.GetFirst();
1125
1126     while (node)
1127     {
1128         wxSizerItem    *item = node->GetData();
1129         wxSize          sz( item->CalcMin() );
1130         int             row = i / ncols;
1131         int             col = i % ncols;
1132
1133         m_rowHeights[ row ] = wxMax( sz.y, m_rowHeights[ row ] );
1134         m_colWidths[ col ] = wxMax( sz.x, m_colWidths[ col ] );
1135
1136         node = node->GetNext();
1137         i++;
1138     }
1139
1140     int width = 0;
1141     for (int col = 0; col < ncols; col++)
1142         width += m_colWidths[ col ];
1143
1144     int height = 0;
1145     for (int row = 0; row < nrows; row++)
1146         height += m_rowHeights[ row ];
1147
1148     return wxSize( width +  (ncols-1) * m_hgap,
1149                    height + (nrows-1) * m_vgap);
1150 }
1151
1152 void wxFlexGridSizer::AddGrowableRow( size_t idx )
1153 {
1154     m_growableRows.Add( idx );
1155 }
1156
1157 void wxFlexGridSizer::RemoveGrowableRow( size_t WXUNUSED(idx) )
1158 {
1159 }
1160
1161 void wxFlexGridSizer::AddGrowableCol( size_t idx )
1162 {
1163     m_growableCols.Add( idx );
1164 }
1165
1166 void wxFlexGridSizer::RemoveGrowableCol( size_t WXUNUSED(idx) )
1167 {
1168 }
1169
1170 //---------------------------------------------------------------------------
1171 // wxBoxSizer
1172 //---------------------------------------------------------------------------
1173
1174 wxBoxSizer::wxBoxSizer( int orient )
1175     : m_orient( orient )
1176 {
1177 }
1178
1179 void wxBoxSizer::RecalcSizes()
1180 {
1181     if (m_children.GetCount() == 0)
1182         return;
1183
1184     int delta = 0;
1185     int extra = 0;
1186     if (m_stretchable)
1187     {
1188         if (m_orient == wxHORIZONTAL)
1189         {
1190             delta = (m_size.x - m_fixedWidth) / m_stretchable;
1191             extra = (m_size.x - m_fixedWidth) % m_stretchable;
1192         }
1193         else
1194         {
1195             delta = (m_size.y - m_fixedHeight) / m_stretchable;
1196             extra = (m_size.y - m_fixedHeight) % m_stretchable;
1197         }
1198     }
1199
1200     wxPoint pt( m_position );
1201
1202     wxSizerItemList::Node   *node = m_children.GetFirst();
1203     while (node)
1204     {
1205         wxSizerItem     *item = node->GetData();
1206
1207         if (item->IsShown())
1208         {
1209             int weight = 1;
1210             if (item->GetProportion())
1211                 weight = item->GetProportion();
1212
1213             wxSize size( item->CalcMin() );
1214
1215             if (m_orient == wxVERTICAL)
1216             {
1217                 wxCoord height = size.y;
1218                 if (item->GetProportion())
1219                 {
1220                     height = (delta * weight) + extra;
1221                     extra = 0; // only the first item will get the remainder as extra size
1222                 }
1223
1224                 wxPoint child_pos( pt );
1225                 wxSize  child_size( wxSize( size.x, height) );
1226
1227                 if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1228                     child_size.x = m_size.x;
1229                 else if (item->GetFlag() & wxALIGN_RIGHT)
1230                     child_pos.x += m_size.x - size.x;
1231                 else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_HORIZONTAL))
1232                 // XXX wxCENTER is added for backward compatibility;
1233                 //     wxALIGN_CENTER should be used in new code
1234                     child_pos.x += (m_size.x - size.x) / 2;
1235
1236                 item->SetDimension( child_pos, child_size );
1237
1238                 pt.y += height;
1239             }
1240             else
1241             {
1242                 wxCoord width = size.x;
1243                 if (item->GetProportion())
1244                 {
1245                     width = (delta * weight) + extra;
1246                     extra = 0; // only the first item will get the remainder as extra size
1247                 }
1248
1249                 wxPoint child_pos( pt );
1250                 wxSize  child_size( wxSize(width, size.y) );
1251
1252                 if (item->GetFlag() & (wxEXPAND | wxSHAPED))
1253                     child_size.y = m_size.y;
1254                 else if (item->GetFlag() & wxALIGN_BOTTOM)
1255                     child_pos.y += m_size.y - size.y;
1256                 else if (item->GetFlag() & (wxCENTER | wxALIGN_CENTER_VERTICAL))
1257                 // XXX wxCENTER is added for backward compatibility;
1258                 //     wxALIGN_CENTER should be used in new code
1259                     child_pos.y += (m_size.y - size.y) / 2;
1260
1261                 item->SetDimension( child_pos, child_size );
1262
1263                 pt.x += width;
1264             }
1265         }
1266
1267         node = node->GetNext();
1268     }
1269 }
1270
1271 wxSize wxBoxSizer::CalcMin()
1272 {
1273     if (m_children.GetCount() == 0)
1274         return wxSize(10,10);
1275
1276     m_stretchable = 0;
1277     m_minWidth = 0;
1278     m_minHeight = 0;
1279     m_fixedWidth = 0;
1280     m_fixedHeight = 0;
1281
1282     // Find how long each stretch unit needs to be
1283     int                      stretchSize = 1;
1284     wxSizerItemList::Node   *node = m_children.GetFirst();
1285
1286     while (node)
1287     {
1288         wxSizerItem     *item = node->GetData();
1289
1290         if (item->IsShown() && item->GetProportion() != 0)
1291         {
1292             int stretch = item->GetProportion();
1293             wxSize size( item->CalcMin() );
1294             int sizePerStretch;
1295             // Integer division rounded up is (a + b - 1) / b
1296             if (m_orient == wxHORIZONTAL)
1297                 sizePerStretch = ( size.x + stretch - 1 ) / stretch;
1298             else
1299                 sizePerStretch = ( size.y + stretch - 1 ) / stretch;
1300             if (sizePerStretch > stretchSize)
1301                 stretchSize = sizePerStretch;
1302         }
1303         node = node->GetNext();
1304     }
1305
1306     // Calculate overall minimum size
1307     node = m_children.GetFirst();
1308     while (node)
1309     {
1310         wxSizerItem     *item = node->GetData();
1311
1312         if (item->IsShown())
1313         {
1314             m_stretchable += item->GetProportion();
1315
1316             wxSize size( item->CalcMin() );
1317             if (item->GetProportion() != 0)
1318             {
1319                 if (m_orient == wxHORIZONTAL)
1320                     size.x = stretchSize * item->GetProportion();
1321                 else
1322                     size.y = stretchSize * item->GetProportion();
1323             }
1324
1325             if (m_orient == wxHORIZONTAL)
1326             {
1327                 m_minWidth += size.x;
1328                 m_minHeight = wxMax( m_minHeight, size.y );
1329             }
1330             else
1331             {
1332                 m_minHeight += size.y;
1333                 m_minWidth = wxMax( m_minWidth, size.x );
1334             }
1335
1336             if (item->GetProportion() == 0)
1337             {
1338                 if (m_orient == wxVERTICAL)
1339                 {
1340                     m_fixedHeight += size.y;
1341                     m_fixedWidth = wxMax( m_fixedWidth, size.x );
1342                 }
1343                 else
1344                 {
1345                     m_fixedWidth += size.x;
1346                     m_fixedHeight = wxMax( m_fixedHeight, size.y );
1347                 }
1348             }
1349         }
1350         node = node->GetNext();
1351     }
1352
1353     return wxSize( m_minWidth, m_minHeight );
1354 }
1355
1356 //---------------------------------------------------------------------------
1357 // wxStaticBoxSizer
1358 //---------------------------------------------------------------------------
1359
1360 #if wxUSE_STATBOX
1361
1362 wxStaticBoxSizer::wxStaticBoxSizer( wxStaticBox *box, int orient )
1363     : wxBoxSizer( orient )
1364     , m_staticBox( box )
1365 {
1366     wxASSERT_MSG( box, wxT("wxStaticBoxSizer needs a static box") );
1367 }
1368
1369 static void GetStaticBoxBorders( wxStaticBox *box,
1370                                  int *borderTop,
1371                                  int *borderOther)
1372 {
1373     // this has to be done platform by platform as there is no way to
1374     // guess the thickness of a wxStaticBox border
1375 #ifdef __WXGTK__
1376     if ( box->GetLabel().IsEmpty() )
1377         *borderTop = 5;
1378     else
1379 #endif // __WXGTK__
1380         *borderTop = 15;
1381     (void)box;
1382     *borderOther = 5;
1383 }
1384
1385 void wxStaticBoxSizer::RecalcSizes()
1386 {
1387     int top_border, other_border;
1388     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1389
1390     m_staticBox->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1391
1392     wxPoint old_pos( m_position );
1393     m_position.x += other_border;
1394     m_position.y += top_border;
1395     wxSize old_size( m_size );
1396     m_size.x -= 2*other_border;
1397     m_size.y -= top_border + other_border;
1398
1399     wxBoxSizer::RecalcSizes();
1400
1401     m_position = old_pos;
1402     m_size = old_size;
1403 }
1404
1405 wxSize wxStaticBoxSizer::CalcMin()
1406 {
1407     int top_border, other_border;
1408     GetStaticBoxBorders(m_staticBox, &top_border, &other_border);
1409
1410     wxSize ret( wxBoxSizer::CalcMin() );
1411     ret.x += 2*other_border;
1412     ret.y += other_border + top_border;
1413
1414     return ret;
1415 }
1416
1417 #endif // wxUSE_STATBOX
1418
1419 //---------------------------------------------------------------------------
1420 // wxNotebookSizer
1421 //---------------------------------------------------------------------------
1422
1423 #if wxUSE_NOTEBOOK
1424
1425 wxNotebookSizer::wxNotebookSizer( wxNotebook *nb )
1426     : m_notebook( nb )
1427 {
1428     wxASSERT_MSG( nb, wxT("wxNotebookSizer needs a notebook") );
1429 }
1430
1431 void wxNotebookSizer::RecalcSizes()
1432 {
1433     m_notebook->SetSize( m_position.x, m_position.y, m_size.x, m_size.y );
1434 }
1435
1436 wxSize wxNotebookSizer::CalcMin()
1437 {
1438     wxSize sizeBorder = m_notebook->CalcSizeFromPage(wxSize(0, 0));
1439
1440     sizeBorder.x += 5;
1441     sizeBorder.y += 5;
1442
1443     if (m_notebook->GetChildren().GetCount() == 0)
1444     {
1445         return wxSize(sizeBorder.x + 10, sizeBorder.y + 10);
1446     }
1447
1448     int maxX = 0;
1449     int maxY = 0;
1450
1451     wxWindowList::Node *node = m_notebook->GetChildren().GetFirst();
1452     while (node)
1453     {
1454         wxWindow *item = node->GetData();
1455         wxSizer *itemsizer = item->GetSizer();
1456
1457         if (itemsizer)
1458         {
1459             wxSize subsize( itemsizer->CalcMin() );
1460
1461             if (subsize.x > maxX)
1462                 maxX = subsize.x;
1463             if (subsize.y > maxY)
1464                 maxY = subsize.y;
1465         }
1466
1467         node = node->GetNext();
1468     }
1469
1470     return wxSize( maxX, maxY ) + sizeBorder;
1471 }
1472
1473 #endif // wxUSE_NOTEBOOK
1474
1475 // vi:sts=4:sw=4:et