src/common/sizer.cpp

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