src/common/layout.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        layout.cpp
   3 // Purpose:     Constraint layout system classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:       wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // =============================================================================
  13 // declarations
  14 // =============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #ifdef __GNUG__
  20     #pragma implementation "layout.h"
  21 #endif
  22
  23 // For compilers that support precompilation, includes "wx.h".
  24 #include "wx/wxprec.h"
  25
  26 #ifdef __BORLANDC__
  27     #pragma hdrstop
  28 #endif
  29
  30 #include "wx/defs.h"
  31
  32 #ifndef WX_PRECOMP
  33     #include "wx/window.h"
  34     #include "wx/utils.h"
  35     #include "wx/dialog.h"
  36     #include "wx/msgdlg.h"
  37     #include "wx/intl.h"
  38 #endif
  39
  40 #include "wx/layout.h"
  41
  42 #if !USE_SHARED_LIBRARY
  43     IMPLEMENT_DYNAMIC_CLASS(wxIndividualLayoutConstraint, wxObject)
  44     IMPLEMENT_DYNAMIC_CLASS(wxLayoutConstraints, wxObject)
  45     IMPLEMENT_DYNAMIC_CLASS(wxSizer, wxObject)
  46     IMPLEMENT_DYNAMIC_CLASS(wxRowColSizer, wxSizer)
  47     IMPLEMENT_DYNAMIC_CLASS(wxSpacingSizer, wxSizer)
  48 #endif
  49
  50 /*
  51 TODO:
  52  - Non shrink-to-fit row-col behaviour.
  53  - Give justification styles, so can e.g. centre
  54  the rows & cols, distribute the available space...
  55  - Shrink-to-fit: should resize outer window (e.g. dialog box)
  56  if directly associated with this kind of window.
  57  - How to deal with a rowcol that stretches in one direction
  58  but shrinks-to-fit in other. E.g. a horizontal toolbar: the width
  59  stretches to fit the frame, but the height is constant
  60  or wraps around contents. The algorithm currently assumes
  61  both dimensions have the same behaviour. Could assume a constant
  62  height (absolute value).
  63  - rowcol where each row or column is aligned (length of
  64    largest element determines spacing)
  65  - Groupbox sizer
  66  - Analyze aesthetic dialog boxes and implement using sizers.
  67  - What reuseable components can we provide? E.g. Ok/Cancel/Help
  68    group of buttons.
  69  - use wxStaticItems for aesthetic dialogs.
  70
  71 */
  72
  73 // Find margin sizes if a sizer, or zero otherwise
  74 int wxSizerMarginX(wxWindowBase *win)
  75 {
  76     if ( win->IsKindOf(CLASSINFO(wxSizer)) )
  77     {
  78         wxSizer *sizer = (wxSizer *)win;
  79         return sizer->GetBorderX();
  80     }
  81     else
  82         return 0;
  83 }
  84
  85 int wxSizerMarginY(wxWindowBase *win)
  86 {
  87     if ( win->IsKindOf(CLASSINFO(wxSizer)) )
  88     {
  89         wxSizer *sizer = (wxSizer *)win;
  90         return sizer->GetBorderY();
  91     }
  92     else
  93         return 0;
  94 }
  95
  96
  97 wxIndividualLayoutConstraint::wxIndividualLayoutConstraint()
  98 {
  99     myEdge = wxTop;
 100     relationship = wxUnconstrained;
 101     margin = 0;
 102     value = 0;
 103     percent = 0;
 104     otherEdge = wxTop;
 105     done = FALSE;
 106     otherWin = (wxWindowBase *) NULL;
 107 }
 108
 109 wxIndividualLayoutConstraint::~wxIndividualLayoutConstraint()
 110 {
 111 }
 112
 113 void wxIndividualLayoutConstraint::Set(wxRelationship rel, wxWindowBase *otherW, wxEdge otherE, int val, int marg)
 114 {
 115   relationship = rel;
 116   otherWin = otherW;
 117   otherEdge = otherE;
 118   value = val;
 119   margin = marg;
 120 }
 121
 122 void wxIndividualLayoutConstraint::LeftOf(wxWindowBase *sibling, int marg)
 123 {
 124     Set(wxLeftOf, sibling, wxLeft, 0, marg);
 125 }
 126
 127 void wxIndividualLayoutConstraint::RightOf(wxWindowBase *sibling, int marg)
 128 {
 129     Set(wxRightOf, sibling, wxRight, 0, marg);
 130 }
 131
 132 void wxIndividualLayoutConstraint::Above(wxWindowBase *sibling, int marg)
 133 {
 134     Set(wxAbove, sibling, wxTop, 0, marg);
 135 }
 136
 137 void wxIndividualLayoutConstraint::Below(wxWindowBase *sibling, int marg)
 138 {
 139     Set(wxBelow, sibling, wxBottom, 0, marg);
 140 }
 141
 142 //
 143 // 'Same edge' alignment
 144 //
 145 void wxIndividualLayoutConstraint::SameAs(wxWindowBase *otherW, wxEdge edge, int marg)
 146 {
 147     Set(wxPercentOf, otherW, edge, 0, marg);
 148     percent = 100;
 149 }
 150
 151 // The edge is a percentage of the other window's edge
 152 void wxIndividualLayoutConstraint::PercentOf(wxWindowBase *otherW, wxEdge wh, int per)
 153 {
 154     otherWin = otherW;
 155     relationship = wxPercentOf;
 156     percent = per;
 157
 158     otherEdge = wh;
 159 }
 160
 161 //
 162 // Edge has absolute value
 163 //
 164 void wxIndividualLayoutConstraint::Absolute(int val)
 165 {
 166     value = val; relationship = wxAbsolute;
 167 }
 168
 169 // Reset constraint if it mentions otherWin
 170 bool wxIndividualLayoutConstraint::ResetIfWin(wxWindowBase *otherW)
 171 {
 172     if (otherW == otherWin)
 173     {
 174         myEdge = wxTop;
 175         relationship = wxAsIs;
 176         margin = 0;
 177         value = 0;
 178         percent = 0;
 179         otherEdge = wxTop;
 180         otherWin = (wxWindowBase *) NULL;
 181         return TRUE;
 182     }
 183     else
 184         return FALSE;
 185 }
 186
 187 // Try to satisfy constraint
 188 bool wxIndividualLayoutConstraint::SatisfyConstraint(wxLayoutConstraints *constraints, wxWindowBase *win)
 189 {
 190     if (relationship == wxAbsolute)
 191     {
 192         done = TRUE;
 193         return TRUE;
 194     }
 195
 196     switch (myEdge)
 197     {
 198         case wxLeft:
 199         {
 200             switch (relationship)
 201             {
 202                 case wxLeftOf:
 203                 {
 204                     // We can know this edge if: otherWin is win's
 205                     // parent, or otherWin has a satisfied constraint,
 206                     // or otherWin has no constraint.
 207                     int edgePos = GetEdge(otherEdge, win, otherWin);
 208                     if (edgePos != -1)
 209                     {
 210                         value = edgePos - margin;
 211                         done = TRUE;
 212                         return TRUE;
 213                     }
 214                     else
 215                         return FALSE;
 216                 }
 217                 case wxRightOf:
 218                 {
 219                     int edgePos = GetEdge(otherEdge, win, otherWin);
 220                     if (edgePos != -1)
 221                     {
 222                         value = edgePos + margin;
 223                         done = TRUE;
 224                         return TRUE;
 225                     }
 226                     else
 227                         return FALSE;
 228                 }
 229                 case wxPercentOf:
 230                 {
 231                     int edgePos = GetEdge(otherEdge, win, otherWin);
 232                     if (edgePos != -1)
 233                     {
 234                         value = (int)(edgePos*(((float)percent)*0.01) + margin);
 235                         done = TRUE;
 236                         return TRUE;
 237                     }
 238                     else
 239                         return FALSE;
 240                 }
 241                 case wxUnconstrained:
 242                 {
 243                     // We know the left-hand edge position if we know
 244                     // the right-hand edge and we know the width; OR if
 245                     // we know the centre and the width.
 246                     if (constraints->right.GetDone() && constraints->width.GetDone())
 247                     {
 248                         value = (constraints->right.GetValue() - constraints->width.GetValue() + margin);
 249                         done = TRUE;
 250                         return TRUE;
 251                     }
 252                     else if (constraints->centreX.GetDone() && constraints->width.GetDone())
 253                     {
 254                         value = (int)(constraints->centreX.GetValue() - (constraints->width.GetValue()/2) + margin);
 255                         done = TRUE;
 256                         return TRUE;
 257                     }
 258                     else
 259                         return FALSE;
 260                 }
 261                 case wxAsIs:
 262                 {
 263                     int y;
 264                     win->GetPosition(&value, &y);
 265                     done = TRUE;
 266                     return TRUE;
 267                 }
 268                 default:
 269                     break;
 270             }
 271             break;
 272         }
 273         case wxRight:
 274         {
 275             switch (relationship)
 276             {
 277                 case wxLeftOf:
 278                 {
 279                     // We can know this edge if: otherWin is win's
 280                     // parent, or otherWin has a satisfied constraint,
 281                     // or otherWin has no constraint.
 282                     int edgePos = GetEdge(otherEdge, win, otherWin);
 283                     if (edgePos != -1)
 284                     {
 285                         value = edgePos - margin;
 286                         done = TRUE;
 287                         return TRUE;
 288                     }
 289                     else
 290                         return FALSE;
 291                 }
 292                 case wxRightOf:
 293                 {
 294                     int edgePos = GetEdge(otherEdge, win, otherWin);
 295                     if (edgePos != -1)
 296                     {
 297                         value = edgePos + margin;
 298                         done = TRUE;
 299                         return TRUE;
 300                     }
 301                     else
 302                         return FALSE;
 303                 }
 304                 case wxPercentOf:
 305                 {
 306                     int edgePos = GetEdge(otherEdge, win, otherWin);
 307                     if (edgePos != -1)
 308                     {
 309                         value = (int)(edgePos*(((float)percent)*0.01) - margin);
 310                         done = TRUE;
 311                         return TRUE;
 312                     }
 313                     else
 314                         return FALSE;
 315                 }
 316                 case wxUnconstrained:
 317                 {
 318                     // We know the right-hand edge position if we know the
 319                     // left-hand edge and we know the width, OR if we know the
 320                     // centre edge and the width.
 321                     if (constraints->left.GetDone() && constraints->width.GetDone())
 322                     {
 323                         value = (constraints->left.GetValue() + constraints->width.GetValue() - margin);
 324                         done = TRUE;
 325                         return TRUE;
 326                     }
 327                     else if (constraints->centreX.GetDone() && constraints->width.GetDone())
 328                     {
 329                         value = (int)(constraints->centreX.GetValue() + (constraints->width.GetValue()/2) - margin);
 330                         done = TRUE;
 331                         return TRUE;
 332                     }
 333                     else
 334                         return FALSE;
 335                 }
 336                 case wxAsIs:
 337                 {
 338                     int x, y;
 339                     int w, h;
 340                     win->GetSize(&w, &h);
 341                     win->GetPosition(&x, &y);
 342                     value = x + w;
 343                     done = TRUE;
 344                     return TRUE;
 345                 }
 346                 default:
 347                     break;
 348             }
 349             break;
 350         }
 351         case wxTop:
 352         {
 353             switch (relationship)
 354             {
 355                 case wxAbove:
 356                 {
 357                     // We can know this edge if: otherWin is win's
 358                     // parent, or otherWin has a satisfied constraint,
 359                     // or otherWin has no constraint.
 360                     int edgePos = GetEdge(otherEdge, win, otherWin);
 361                     if (edgePos != -1)
 362                     {
 363                         value = edgePos - margin;
 364                         done = TRUE;
 365                         return TRUE;
 366                     }
 367                     else
 368                         return FALSE;
 369                 }
 370                 case wxBelow:
 371                 {
 372                     int edgePos = GetEdge(otherEdge, win, otherWin);
 373                     if (edgePos != -1)
 374                     {
 375                         value = edgePos + margin;
 376                         done = TRUE;
 377                         return TRUE;
 378                     }
 379                     else
 380                         return FALSE;
 381                 }
 382                 case wxPercentOf:
 383                 {
 384                     int edgePos = GetEdge(otherEdge, win, otherWin);
 385                     if (edgePos != -1)
 386                     {
 387                         value = (int)(edgePos*(((float)percent)*0.01) + margin);
 388                         done = TRUE;
 389                         return TRUE;
 390                     }
 391                     else
 392                         return FALSE;
 393                 }
 394                 case wxUnconstrained:
 395                 {
 396                     // We know the top edge position if we know the bottom edge
 397                     // and we know the height; OR if we know the centre edge and
 398                     // the height.
 399                     if (constraints->bottom.GetDone() && constraints->height.GetDone())
 400                     {
 401                         value = (constraints->bottom.GetValue() - constraints->height.GetValue() + margin);
 402                         done = TRUE;
 403                         return TRUE;
 404                     }
 405                     else if (constraints->centreY.GetDone() && constraints->height.GetDone())
 406                     {
 407                         value = (constraints->centreY.GetValue() - (constraints->height.GetValue()/2) + margin);
 408                         done = TRUE;
 409                         return TRUE;
 410                     }
 411                     else
 412                         return FALSE;
 413                 }
 414                 case wxAsIs:
 415                 {
 416                     int x;
 417                     win->GetPosition(&x, &value);
 418                     done = TRUE;
 419                     return TRUE;
 420                 }
 421                 default:
 422                     break;
 423             }
 424             break;
 425         }
 426         case wxBottom:
 427         {
 428             switch (relationship)
 429             {
 430                 case wxAbove:
 431                 {
 432                     // We can know this edge if: otherWin is win's parent,
 433                     // or otherWin has a satisfied constraint, or
 434                     // otherWin has no constraint.
 435                     int edgePos = GetEdge(otherEdge, win, otherWin);
 436                     if (edgePos != -1)
 437                     {
 438                         value = edgePos + margin;
 439                         done = TRUE;
 440                         return TRUE;
 441                     }
 442                     else
 443                         return FALSE;
 444                 }
 445                 case wxBelow:
 446                 {
 447                     int edgePos = GetEdge(otherEdge, win, otherWin);
 448                     if (edgePos != -1)
 449                     {
 450                         value = edgePos - margin;
 451                         done = TRUE;
 452                         return TRUE;
 453                     }
 454                     else
 455                         return FALSE;
 456                 }
 457                 case wxPercentOf:
 458                 {
 459                     int edgePos = GetEdge(otherEdge, win, otherWin);
 460                     if (edgePos != -1)
 461                     {
 462                         value = (int)(edgePos*(((float)percent)*0.01) - margin);
 463                         done = TRUE;
 464                         return TRUE;
 465                     }
 466                     else
 467                         return FALSE;
 468                 }
 469                 case wxUnconstrained:
 470                 {
 471                     // We know the bottom edge position if we know the top edge
 472                     // and we know the height; OR if we know the centre edge and
 473                     // the height.
 474                     if (constraints->top.GetDone() && constraints->height.GetDone())
 475                     {
 476                         value = (constraints->top.GetValue() + constraints->height.GetValue() - margin);
 477                         done = TRUE;
 478                         return TRUE;
 479                     }
 480                     else if (constraints->centreY.GetDone() && constraints->height.GetDone())
 481                     {
 482                         value = (constraints->centreY.GetValue() + (constraints->height.GetValue()/2) - margin);
 483                         done = TRUE;
 484                         return TRUE;
 485                     }
 486                     else
 487                         return FALSE;
 488                 }
 489                 case wxAsIs:
 490                 {
 491                     int x, y;
 492                     int w, h;
 493                     win->GetSize(&w, &h);
 494                     win->GetPosition(&x, &y);
 495                     value = h + y;
 496                     done = TRUE;
 497                     return TRUE;
 498                 }
 499                 default:
 500                     break;
 501             }
 502             break;
 503         }
 504         case wxCentreX:
 505         {
 506             switch (relationship)
 507             {
 508                 case wxLeftOf:
 509                 {
 510                     // We can know this edge if: otherWin is win's parent, or
 511                     // otherWin has a satisfied constraint, or otherWin has no
 512                     // constraint.
 513                     int edgePos = GetEdge(otherEdge, win, otherWin);
 514                     if (edgePos != -1)
 515                     {
 516                         value = edgePos - margin;
 517                         done = TRUE;
 518                         return TRUE;
 519                     }
 520                     else
 521                         return FALSE;
 522                 }
 523                 case wxRightOf:
 524                 {
 525                     int edgePos = GetEdge(otherEdge, win, otherWin);
 526                     if (edgePos != -1)
 527                     {
 528                         value = edgePos + margin;
 529                         done = TRUE;
 530                         return TRUE;
 531                     }
 532                     else
 533                         return FALSE;
 534                 }
 535                 case wxPercentOf:
 536                 {
 537                     int edgePos = GetEdge(otherEdge, win, otherWin);
 538                     if (edgePos != -1)
 539                     {
 540                         value = (int)(edgePos*(((float)percent)*0.01) + margin);
 541                         done = TRUE;
 542                         return TRUE;
 543                     }
 544                     else
 545                         return FALSE;
 546                 }
 547                 case wxUnconstrained:
 548                 {
 549                     // We know the centre position if we know
 550                     // the left-hand edge and we know the width, OR
 551                     // the right-hand edge and the width
 552                     if (constraints->left.GetDone() && constraints->width.GetDone())
 553                     {
 554                         value = (int)(constraints->left.GetValue() + (constraints->width.GetValue()/2) + margin);
 555                         done = TRUE;
 556                         return TRUE;
 557                     }
 558                     else if (constraints->right.GetDone() && constraints->width.GetDone())
 559                     {
 560                         value = (int)(constraints->left.GetValue() - (constraints->width.GetValue()/2) + margin);
 561                         done = TRUE;
 562                         return TRUE;
 563                     }
 564                     else
 565                         return FALSE;
 566                 }
 567                 default:
 568                     break;
 569             }
 570             break;
 571         }
 572         case wxCentreY:
 573         {
 574             switch (relationship)
 575             {
 576                 case wxAbove:
 577                 {
 578                     // We can know this edge if: otherWin is win's parent,
 579                     // or otherWin has a satisfied constraint, or otherWin
 580                     // has no constraint.
 581                     int edgePos = GetEdge(otherEdge, win, otherWin);
 582                     if (edgePos != -1)
 583                     {
 584                         value = edgePos - margin;
 585                         done = TRUE;
 586                         return TRUE;
 587                     }
 588                     else
 589                         return FALSE;
 590                 }
 591                 case wxBelow:
 592                 {
 593                     int edgePos = GetEdge(otherEdge, win, otherWin);
 594                     if (edgePos != -1)
 595                     {
 596                         value = edgePos + margin;
 597                         done = TRUE;
 598                         return TRUE;
 599                     }
 600                     else
 601                         return FALSE;
 602                 }
 603                 case wxPercentOf:
 604                 {
 605                     int edgePos = GetEdge(otherEdge, win, otherWin);
 606                     if (edgePos != -1)
 607                     {
 608                         value = (int)(edgePos*(((float)percent)*0.01) + margin);
 609                         done = TRUE;
 610                         return TRUE;
 611                     }
 612                     else
 613                         return FALSE;
 614                 }
 615                 case wxUnconstrained:
 616                 {
 617                     // We know the centre position if we know
 618                     // the top edge and we know the height, OR
 619                     // the bottom edge and the height.
 620                     if (constraints->bottom.GetDone() && constraints->height.GetDone())
 621                     {
 622                         value = (int)(constraints->bottom.GetValue() - (constraints->height.GetValue()/2) + margin);
 623                         done = TRUE;
 624                         return TRUE;
 625                     }
 626                     else if (constraints->top.GetDone() && constraints->height.GetDone())
 627                     {
 628                         value = (int)(constraints->top.GetValue() + (constraints->height.GetValue()/2) + margin);
 629                         done = TRUE;
 630                         return TRUE;
 631                     }
 632                     else
 633                         return FALSE;
 634                 }
 635                 default:
 636                     break;
 637             }
 638             break;
 639         }
 640         case wxWidth:
 641         {
 642             switch (relationship)
 643             {
 644                 case wxPercentOf:
 645                 {
 646                     int edgePos = GetEdge(otherEdge, win, otherWin);
 647                     if (edgePos != -1)
 648                     {
 649                         value = (int)(edgePos*(((float)percent)*0.01));
 650                         done = TRUE;
 651                         return TRUE;
 652                     }
 653                     else
 654                         return FALSE;
 655                 }
 656                 case wxAsIs:
 657                 {
 658                     if (win)
 659                     {
 660                         int h;
 661                         win->GetSize(&value, &h);
 662                         done = TRUE;
 663                         return TRUE;
 664                     }
 665                     else return FALSE;
 666                 }
 667                 case wxUnconstrained:
 668                 {
 669                     // We know the width if we know the left edge and the right edge, OR
 670                     // if we know the left edge and the centre, OR
 671                     // if we know the right edge and the centre
 672                     if (constraints->left.GetDone() && constraints->right.GetDone())
 673                     {
 674                         value = constraints->right.GetValue() - constraints->left.GetValue();
 675                         done = TRUE;
 676                         return TRUE;
 677                     }
 678                     else if (constraints->centreX.GetDone() && constraints->left.GetDone())
 679                     {
 680                         value = (int)(2*(constraints->centreX.GetValue() - constraints->left.GetValue()));
 681                         done = TRUE;
 682                         return TRUE;
 683                     }
 684                     else if (constraints->centreX.GetDone() && constraints->right.GetDone())
 685                     {
 686                         value = (int)(2*(constraints->right.GetValue() - constraints->centreX.GetValue()));
 687                         done = TRUE;
 688                         return TRUE;
 689                     }
 690                     else
 691                         return FALSE;
 692                 }
 693                 default:
 694                     break;
 695             }
 696             break;
 697         }
 698         case wxHeight:
 699         {
 700             switch (relationship)
 701             {
 702                 case wxPercentOf:
 703                 {
 704                     int edgePos = GetEdge(otherEdge, win, otherWin);
 705                     if (edgePos != -1)
 706                     {
 707                         value = (int)(edgePos*(((float)percent)*0.01));
 708                         done = TRUE;
 709                         return TRUE;
 710                     }
 711                     else
 712                         return FALSE;
 713                 }
 714                 case wxAsIs:
 715                 {
 716                     if (win)
 717                     {
 718                         int w;
 719                         win->GetSize(&w, &value);
 720                         done = TRUE;
 721                         return TRUE;
 722                     }
 723                     else return FALSE;
 724                 }
 725                 case wxUnconstrained:
 726                 {
 727                     // We know the height if we know the top edge and the bottom edge, OR
 728                     // if we know the top edge and the centre, OR
 729                     // if we know the bottom edge and the centre
 730                     if (constraints->top.GetDone() && constraints->bottom.GetDone())
 731                     {
 732                         value = constraints->bottom.GetValue() - constraints->top.GetValue();
 733                         done = TRUE;
 734                         return TRUE;
 735                     }
 736                     else if (constraints->top.GetDone() && constraints->centreY.GetDone())
 737                     {
 738                         value = (int)(2*(constraints->centreY.GetValue() - constraints->top.GetValue()));
 739                         done = TRUE;
 740                         return TRUE;
 741                     }
 742                     else if (constraints->bottom.GetDone() && constraints->centreY.GetDone())
 743                     {
 744                         value = (int)(2*(constraints->bottom.GetValue() - constraints->centreY.GetValue()));
 745                         done = TRUE;
 746                         return TRUE;
 747                     }
 748                     else
 749                         return FALSE;
 750                 }
 751                 default:
 752                     break;
 753             }
 754             break;
 755         }
 756         default:
 757             break;
 758     }
 759     return FALSE;
 760 }
 761
 762 // Get the value of this edge or dimension, or if this is not determinable, -1.
 763 int wxIndividualLayoutConstraint::GetEdge(wxEdge which,
 764                                           wxWindowBase *thisWin,
 765                                           wxWindowBase *other) const
 766 {
 767     // If the edge or dimension belongs to the parent, then we know the
 768     // dimension is obtainable immediately. E.g. a wxExpandSizer may contain a
 769     // button (but the button's true parent is a panel, not the sizer)
 770     if (other->GetChildren().Find(thisWin))
 771     {
 772         switch (which)
 773         {
 774             case wxLeft:
 775                 {
 776                     return wxSizerMarginX(other);
 777                 }
 778             case wxTop:
 779                 {
 780                     return wxSizerMarginY(other);
 781                 }
 782             case wxRight:
 783                 {
 784                     int w, h;
 785                     other->GetClientSizeConstraint(&w, &h);
 786                     return w - wxSizerMarginX(other);
 787                 }
 788             case wxBottom:
 789                 {
 790                     int w, h;
 791                     other->GetClientSizeConstraint(&w, &h);
 792                     return h - wxSizerMarginY(other);
 793                 }
 794             case wxWidth:
 795                 {
 796                     int w, h;
 797                     other->GetClientSizeConstraint(&w, &h);
 798                     return w - 2*wxSizerMarginX(other);
 799                 }
 800             case wxHeight:
 801                 {
 802                     int w, h;
 803                     other->GetClientSizeConstraint(&w, &h);
 804                     return h - 2*wxSizerMarginY(other);
 805                 }
 806             case wxCentreX:
 807             case wxCentreY:
 808                 {
 809                     int w, h;
 810                     other->GetClientSizeConstraint(&w, &h);
 811                     if (which == wxCentreX)
 812                         return (int)(w/2);
 813                     else
 814                         return (int)(h/2);
 815                 }
 816             default:
 817                 return -1;
 818         }
 819     }
 820     switch (which)
 821     {
 822         case wxLeft:
 823             {
 824                 wxLayoutConstraints *constr = other->GetConstraints();
 825                 // If no constraints, it means the window is not dependent
 826                 // on anything, and therefore we know its value immediately
 827                 if (constr)
 828                 {
 829                     if (constr->left.GetDone())
 830                         return constr->left.GetValue();
 831                     else
 832                         return -1;
 833                 }
 834                 else
 835                 {
 836                     int x, y;
 837                     other->GetPosition(&x, &y);
 838                     return x;
 839                 }
 840             }
 841         case wxTop:
 842             {
 843                 wxLayoutConstraints *constr = other->GetConstraints();
 844                 // If no constraints, it means the window is not dependent
 845                 // on anything, and therefore we know its value immediately
 846                 if (constr)
 847                 {
 848                     if (constr->top.GetDone())
 849                         return constr->top.GetValue();
 850                     else
 851                         return -1;
 852                 }
 853                 else
 854                 {
 855                     int x, y;
 856                     other->GetPosition(&x, &y);
 857                     return y;
 858                 }
 859             }
 860         case wxRight:
 861             {
 862                 wxLayoutConstraints *constr = other->GetConstraints();
 863                 // If no constraints, it means the window is not dependent
 864                 // on anything, and therefore we know its value immediately
 865                 if (constr)
 866                 {
 867                     if (constr->right.GetDone())
 868                         return constr->right.GetValue();
 869                     else
 870                         return -1;
 871                 }
 872                 else
 873                 {
 874                     int x, y, w, h;
 875                     other->GetPosition(&x, &y);
 876                     other->GetSize(&w, &h);
 877                     return (int)(x + w);
 878                 }
 879             }
 880         case wxBottom:
 881             {
 882                 wxLayoutConstraints *constr = other->GetConstraints();
 883                 // If no constraints, it means the window is not dependent
 884                 // on anything, and therefore we know its value immediately
 885                 if (constr)
 886                 {
 887                     if (constr->bottom.GetDone())
 888                         return constr->bottom.GetValue();
 889                     else
 890                         return -1;
 891                 }
 892                 else
 893                 {
 894                     int x, y, w, h;
 895                     other->GetPosition(&x, &y);
 896                     other->GetSize(&w, &h);
 897                     return (int)(y + h);
 898                 }
 899             }
 900         case wxWidth:
 901             {
 902                 wxLayoutConstraints *constr = other->GetConstraints();
 903                 // If no constraints, it means the window is not dependent
 904                 // on anything, and therefore we know its value immediately
 905                 if (constr)
 906                 {
 907                     if (constr->width.GetDone())
 908                         return constr->width.GetValue();
 909                     else
 910                         return -1;
 911                 }
 912                 else
 913                 {
 914                     int w, h;
 915                     other->GetSize(&w, &h);
 916                     return w;
 917                 }
 918             }
 919         case wxHeight:
 920             {
 921                 wxLayoutConstraints *constr = other->GetConstraints();
 922                 // If no constraints, it means the window is not dependent
 923                 // on anything, and therefore we know its value immediately
 924                 if (constr)
 925                 {
 926                     if (constr->height.GetDone())
 927                         return constr->height.GetValue();
 928                     else
 929                         return -1;
 930                 }
 931                 else
 932                 {
 933                     int w, h;
 934                     other->GetSize(&w, &h);
 935                     return h;
 936                 }
 937             }
 938         case wxCentreX:
 939             {
 940                 wxLayoutConstraints *constr = other->GetConstraints();
 941                 // If no constraints, it means the window is not dependent
 942                 // on anything, and therefore we know its value immediately
 943                 if (constr)
 944                 {
 945                     if (constr->centreX.GetDone())
 946                         return constr->centreX.GetValue();
 947                     else
 948                         return -1;
 949                 }
 950                 else
 951                 {
 952                     int x, y, w, h;
 953                     other->GetPosition(&x, &y);
 954                     other->GetSize(&w, &h);
 955                     return (int)(x + (w/2));
 956                 }
 957             }
 958         case wxCentreY:
 959             {
 960                 wxLayoutConstraints *constr = other->GetConstraints();
 961                 // If no constraints, it means the window is not dependent
 962                 // on anything, and therefore we know its value immediately
 963                 if (constr)
 964                 {
 965                     if (constr->centreY.GetDone())
 966                         return constr->centreY.GetValue();
 967                     else
 968                         return -1;
 969                 }
 970                 else
 971                 {
 972                     int x, y, w, h;
 973                     other->GetPosition(&x, &y);
 974                     other->GetSize(&w, &h);
 975                     return (int)(y + (h/2));
 976                 }
 977             }
 978         default:
 979             break;
 980     }
 981     return -1;
 982 }
 983
 984 wxLayoutConstraints::wxLayoutConstraints()
 985 {
 986     left.SetEdge(wxLeft);
 987     top.SetEdge(wxTop);
 988     right.SetEdge(wxRight);
 989     bottom.SetEdge(wxBottom);
 990     centreX.SetEdge(wxCentreX);
 991     centreY.SetEdge(wxCentreY);
 992     width.SetEdge(wxWidth);
 993     height.SetEdge(wxHeight);
 994 }
 995
 996 wxLayoutConstraints::~wxLayoutConstraints()
 997 {
 998 }
 999
1000 bool wxLayoutConstraints::SatisfyConstraints(wxWindowBase *win, int *nChanges)
1001 {
1002     int noChanges = 0;
1003
1004     bool done = width.GetDone();
1005     bool newDone = (done ? TRUE : width.SatisfyConstraint(this, win));
1006     if (newDone != done)
1007         noChanges ++;
1008
1009     done = height.GetDone();
1010     newDone = (done ? TRUE : height.SatisfyConstraint(this, win));
1011     if (newDone != done)
1012         noChanges ++;
1013
1014     done = left.GetDone();
1015     newDone = (done ? TRUE : left.SatisfyConstraint(this, win));
1016     if (newDone != done)
1017         noChanges ++;
1018
1019     done = top.GetDone();
1020     newDone = (done ? TRUE : top.SatisfyConstraint(this, win));
1021     if (newDone != done)
1022         noChanges ++;
1023
1024     done = right.GetDone();
1025     newDone = (done ? TRUE : right.SatisfyConstraint(this, win));
1026     if (newDone != done)
1027         noChanges ++;
1028
1029     done = bottom.GetDone();
1030     newDone = (done ? TRUE : bottom.SatisfyConstraint(this, win));
1031     if (newDone != done)
1032         noChanges ++;
1033
1034     done = centreX.GetDone();
1035     newDone = (done ? TRUE : centreX.SatisfyConstraint(this, win));
1036     if (newDone != done)
1037         noChanges ++;
1038
1039     done = centreY.GetDone();
1040     newDone = (done ? TRUE : centreY.SatisfyConstraint(this, win));
1041     if (newDone != done)
1042         noChanges ++;
1043
1044     *nChanges = noChanges;
1045
1046     return AreSatisfied();
1047 }
1048
1049 /*
1050  * Main constrained layout algorithm. Look at all the child
1051  * windows, and their constraints (if any).
1052  * The idea is to keep iterating through the constraints
1053  * until all left, right, bottom and top edges, and widths and heights,
1054  * are known (or no change occurs and we've failed to resolve all
1055  * constraints).
1056  *
1057  * If the user has not specified a dimension or edge, it will be
1058  * be calculated from the other known values. E.g. If we know
1059  * the right hand edge and the left hand edge, we now know the width.
1060  * The snag here is that this means we must specify absolute dimensions
1061  * twice (in constructor and in constraint), if we wish to use the
1062  * constraint notation to just set the position, for example.
1063  * Otherwise, if we only set ONE edge and no dimension, it would never
1064  * find the other edge.
1065  *
1066  * Algorithm:
1067
1068   Mark all constraints as not done.
1069
1070   iterations = 0;
1071   until no change or iterations >= max iterations
1072     For each child:
1073     {
1074       Calculate all constraints
1075     }
1076     iterations ++;
1077
1078   For each child
1079     Set each calculated position and size
1080
1081  */
1082
1083 #if WXWIN_COMPATIBILITY
1084 bool wxOldDoLayout(wxWindowBase *win)
1085 {
1086   // Make sure this isn't called recursively from below
1087   static wxList doneSoFar;
1088
1089   if (doneSoFar.Member(win))
1090     return TRUE;
1091
1092   doneSoFar.Append(win);
1093
1094   wxNode *node = win->GetChildren().First();
1095   while (node)
1096   {
1097     wxWindowBase *child = (wxWindowBase *)node->Data();
1098     wxLayoutConstraints *constr = child->GetConstraints();
1099     if (constr)
1100     {
1101       constr->left.SetDone(FALSE);
1102       constr->top.SetDone(FALSE);
1103       constr->right.SetDone(FALSE);
1104       constr->bottom.SetDone(FALSE);
1105       constr->width.SetDone(FALSE);
1106       constr->height.SetDone(FALSE);
1107       constr->centreX.SetDone(FALSE);
1108       constr->centreY.SetDone(FALSE);
1109     }
1110     node = node->Next();
1111   }
1112   int noIterations = 0;
1113   int maxIterations = 500;
1114   int noChanges = 1;
1115
1116   while ((noChanges > 0) && (noIterations < maxIterations))
1117   {
1118     noChanges = 0;
1119     wxNode *node = win->GetChildren().First();
1120     while (node)
1121     {
1122       wxWindowBase *child = (wxWindowBase *)node->Data();
1123       wxLayoutConstraints *constr = child->GetConstraints();
1124       if (constr)
1125       {
1126         int tempNoChanges = 0;
1127         (void)constr->SatisfyConstraints(child, &tempNoChanges);
1128         noChanges += tempNoChanges;
1129       }
1130       node = node->Next();
1131     }
1132     noIterations ++;
1133   }
1134 /*
1135   // Would be nice to have a test here to see _which_ constraint(s)
1136   // failed, so we can print a specific diagnostic message.
1137   if (noFailures > 0)
1138   {
1139     wxDebugMsg(_("wxWindowBase::Layout() failed.\n"));
1140   }
1141 */
1142   // Now set the sizes and positions of the children, and
1143   // recursively call Layout().
1144   node = win->GetChildren().First();
1145   while (node)
1146   {
1147     wxWindowBase *child = (wxWindowBase *)node->Data();
1148     wxLayoutConstraints *constr = child->GetConstraints();
1149     if (constr && constr->left.GetDone() && constr->right.GetDone() &&
1150                   constr->width.GetDone() && constr->height.GetDone())
1151     {
1152       int x = constr->left.GetValue();
1153       int y = constr->top.GetValue();
1154       int w = constr->width.GetValue();
1155       int h = constr->height.GetValue();
1156
1157       // If we don't want to resize this window, just move it...
1158       if ((constr->width.GetRelationship() != wxAsIs) ||
1159           (constr->height.GetRelationship() != wxAsIs))
1160       {
1161         // _Should_ call Layout() recursively.
1162         child->SetSize(x, y, w, h);
1163       }
1164       else
1165       {
1166         child->Move(x, y);
1167       }
1168     }
1169     else
1170       child->Layout();
1171     node = node->Next();
1172   }
1173   doneSoFar.DeleteObject(win);
1174
1175   return TRUE;
1176 }
1177 #endif // WXWIN_COMPATIBILITY
1178
1179 wxSizer::wxSizer()
1180 {
1181     sizerBehaviour = wxSizerNone;
1182     borderX = 2;
1183     borderY = 2;
1184     sizerX = 0;
1185     sizerY = 0;
1186     sizerWidth = 0;
1187     sizerHeight = 0;
1188 }
1189
1190 wxSizer::wxSizer(wxWindowBase *parent, wxSizerBehaviour behav)
1191 {
1192     Create(parent, behav);
1193 }
1194
1195 bool wxSizer::Create(wxWindowBase *parent, wxSizerBehaviour behav)
1196 {
1197     sizerBehaviour = behav;
1198     borderX = 2;
1199     borderY = 2;
1200     m_sizerParent = parent;
1201     sizerX = 0;
1202     sizerY = 0;
1203     sizerWidth = 0;
1204     sizerHeight = 0;
1205
1206     // A normal window can have just one top-level sizer
1207     // associated with it.
1208     if (!parent->IsKindOf(CLASSINFO(wxSizer)))
1209     {
1210         parent->SetSizer(this);
1211     }
1212     else
1213         ((wxSizer *)parent)->AddSizerChild(this);
1214
1215     switch (sizerBehaviour)
1216     {
1217         case wxSizerExpand:
1218             {
1219                 // Defines a set of constraints
1220                 // to expand the sizer to fit the parent window
1221                 wxLayoutConstraints *c = new wxLayoutConstraints;
1222
1223                 c->left.SameAs(parent, wxLeft, 0);
1224                 c->top.SameAs(parent, wxTop, 0);
1225                 c->right.SameAs(parent, wxRight, 0);
1226                 c->bottom.SameAs(parent, wxBottom, 0);
1227
1228                 SetConstraints(c);
1229                 break;
1230             }
1231         case wxSizerShrink:
1232         case wxSizerNone:
1233         default:
1234             {
1235             }
1236     }
1237     return TRUE;
1238 }
1239
1240 wxSizer::~wxSizer()
1241 {
1242     // Remove all children without deleting them,
1243     // or ~wxbWindow will delete proper windows _twice_
1244     wxNode *node = GetChildren().First();
1245     while (node)
1246     {
1247         wxNode *next = node->Next();
1248         wxWindowBase *win = (wxWindowBase *)node->Data();
1249         if (!win->IsKindOf(CLASSINFO(wxSizer)))
1250         {
1251             delete node;
1252             win->SetSizerParent((wxWindowBase *) NULL);
1253         }
1254         else
1255         {
1256             RemoveSizerChild(win);
1257             delete win;
1258         }
1259         node = next;
1260     }
1261
1262     if (m_sizerParent) // && !m_sizerParent->IsKindOf(CLASSINFO(wxSizer)))
1263     {
1264         m_sizerParent->SetSizer((wxSizer *) NULL);
1265         m_sizerParent = (wxWindowBase *) NULL;
1266     }
1267
1268 }
1269
1270 void wxSizer::SetBorder(int x, int y)
1271 {
1272     borderX = x;
1273     borderY = y;
1274     /* No: the margin is for inside, not outside (expansion)
1275
1276        if ( GetConstraints() )
1277        {
1278        GetConstraints()->left.SetMargin(x);
1279        GetConstraints()->right.SetMargin(x);
1280        GetConstraints()->top.SetMargin(y);
1281        GetConstraints()->bottom.SetMargin(y);
1282        }
1283      */
1284
1285 }
1286
1287 void wxSizer::AddSizerChild(wxWindowBase *child)
1288 {
1289     child->SetSizerParent(this);
1290     GetChildren().Append(child);
1291
1292     // Add some constraints for the purpose of storing
1293     // the relative position of the window/sizer
1294     // during layout calculations.
1295     if (!child->GetConstraints())
1296     {
1297         wxLayoutConstraints *c = new wxLayoutConstraints;
1298         c->left.AsIs();
1299         c->top.AsIs();
1300         c->width.AsIs();
1301         c->height.AsIs();
1302         int w, h;
1303         child->GetSize(&w, &h);
1304         c->width.SetValue(w);
1305         c->height.SetValue(h);
1306
1307         child->SetConstraints(c);
1308     }
1309 }
1310
1311 void wxSizer::RemoveSizerChild(wxWindowBase *child)
1312 {
1313     GetChildren().DeleteObject(child);
1314 }
1315
1316 void wxSizer::DoSetSize(int x, int y, int w, int h, int WXUNUSED(flags))
1317 {
1318     wxLayoutConstraints *constr = GetConstraints();
1319     if (x != -1)
1320     {
1321         sizerX = x;
1322         if (constr)
1323             constr->left.SetValue(x);
1324     }
1325     if (y != -1)
1326     {
1327         sizerY = y;
1328         if (constr)
1329             constr->top.SetValue(y);
1330     }
1331     if (w != -1)
1332     {
1333         sizerWidth = w;
1334         if (constr)
1335             constr->width.SetValue(w);
1336     }
1337     if (h != -1)
1338     {
1339         sizerHeight = h;
1340         if (constr)
1341             constr->height.SetValue(h);
1342     }
1343 }
1344
1345 void wxSizer::DoGetSize(int *w, int *h) const
1346 {
1347     *w = sizerWidth;
1348     *h = sizerHeight;
1349 }
1350
1351 void wxSizer::DoGetPosition(int *x, int *y) const
1352 {
1353     *x = sizerX;
1354     *y = sizerY;
1355 }
1356
1357 bool wxSizer::LayoutPhase1(int *noChanges)
1358 {
1359     *noChanges = 0;
1360     switch (sizerBehaviour)
1361     {
1362         case wxSizerExpand:
1363             {
1364                 if (!m_sizerParent)
1365                 {
1366                     wxMessageBox(_("wxExpandSizer has no parent!"), _("Sizer error"), wxOK);
1367                     return TRUE;
1368                 }
1369
1370                 // Set the size to fill the parent client area
1371                 int pw, ph;
1372                 m_sizerParent->GetClientSize(&pw, &ph);
1373                 SetSize(GetBorderX(), GetBorderY(), pw - 2*GetBorderX(), ph - 2*GetBorderY());
1374                 wxLayoutConstraints *constr = GetConstraints();
1375
1376                 // Fill in the constraints
1377                 if (constr)
1378                 {
1379                     constr->left.SetValue(0); constr->left.SetDone(TRUE);
1380                     constr->top.SetValue(0); constr->right.SetDone(TRUE);
1381                     constr->width.SetValue(pw); constr->width.SetDone(TRUE);
1382                     constr->height.SetValue(ph); constr->height.SetDone(TRUE);
1383                 }
1384
1385                 return TRUE;
1386                 break;
1387             }
1388         case wxSizerShrink:
1389             {
1390                 wxLayoutConstraints *constr = GetConstraints();
1391
1392                 if (constr)
1393                 {
1394                     // Force the constraint to have as-is width and height
1395                     // if we're in shrink-to-fit mode, because if left unconstrained,
1396                     // SatisfyConstraints will fail. The shrink-to-fit option
1397                     // essentially specifies the width and height as 'whatever I calculate'.
1398                     constr->width.AsIs();
1399                     constr->height.AsIs();
1400                 }
1401                 DoPhase(1);
1402                 DoPhase(2);
1403                 // Find the bounding box and set own size
1404                 int maxX = 0;
1405                 int maxY = 0;
1406
1407                 wxNode *node = GetChildren().First();
1408                 while (node)
1409                 {
1410                     int x, y, width, height;
1411                     wxWindowBase *win = (wxWindowBase *)node->Data();
1412                     win->GetSizeConstraint(&width, &height);
1413                     win->GetPositionConstraint(&x, &y);
1414                     if ((x+width) > maxX)
1415                         maxX = (x + width);
1416                     if ((y+height) > maxY)
1417                         maxY = (y + height);
1418
1419                     node = node->Next();
1420                 }
1421                 SetSize(GetBorderX(), GetBorderY(), maxX, maxY);
1422
1423                 // If this is the only sizer for the parent, size the parent to this sizer.
1424                 if ( m_sizerParent && (m_sizerParent->GetSizer() == this) )
1425                     m_sizerParent->SetClientSize(maxX + 2*GetBorderX(), maxY + 2*GetBorderY());
1426
1427                 return TRUE;
1428                 break;
1429             }
1430         case wxSizerNone:
1431             {
1432                 wxLayoutConstraints *constr = GetConstraints();
1433                 if (constr)
1434                 {
1435                     bool success = constr->SatisfyConstraints(this, noChanges);
1436                     if (success)
1437                     {
1438                         int x = constr->left.GetValue();
1439                         int y = constr->top.GetValue();
1440                         int w = constr->width.GetValue();
1441                         int h = constr->height.GetValue();
1442                         SetSize(x, y, w, h);
1443                     }
1444                     return success;
1445                 }
1446                 else
1447                     return TRUE;
1448                 break;
1449             }
1450     }
1451     return TRUE;
1452
1453 }
1454
1455 bool wxSizer::LayoutPhase2(int *noChanges)
1456 {
1457     *noChanges = 0;
1458
1459     switch (sizerBehaviour)
1460     {
1461         case wxSizerExpand:
1462             {
1463                 // Layout children
1464                 DoPhase(1);
1465                 DoPhase(2);
1466                 return TRUE;
1467             }
1468         case wxSizerShrink:
1469             {
1470                 wxLayoutConstraints *constr = GetConstraints();
1471                 if (constr)
1472                 {
1473                     bool success = constr->SatisfyConstraints(this, noChanges);
1474                     if (success)
1475                     {
1476                         int x = constr->left.GetValue();
1477                         int y = constr->top.GetValue();
1478                         Move(x, y);
1479                     }
1480                     return success;
1481                 }
1482                 break;
1483             }
1484         case wxSizerNone:
1485             {
1486                 // Layout children
1487                 DoPhase(1);
1488                 DoPhase(2);
1489
1490                 // Is this a dumb fix for lack of constraint evaluation?
1491                 wxLayoutConstraints *constr = GetConstraints();
1492                 if (constr)
1493                 {
1494                     bool success = constr->SatisfyConstraints(this, noChanges);
1495                     if (success)
1496                     {
1497                         int x = constr->left.GetValue();
1498                         int y = constr->top.GetValue();
1499                         int w = constr->width.GetValue();
1500                         int h = constr->height.GetValue();
1501                         SetSize(x, y, w, h);
1502                     }
1503                     return success;
1504                 }
1505                 else
1506                     return TRUE;
1507             }
1508     }
1509     return TRUE;
1510 }
1511
1512 /*
1513  * wxRowColSizer
1514  */
1515
1516 wxRowColSizer::wxRowColSizer()
1517 {
1518     rowOrCol = TRUE;
1519     rowOrColSize = 20;
1520     xSpacing = 2;
1521     ySpacing = 2;
1522 }
1523
1524 wxRowColSizer::wxRowColSizer(wxWindowBase *parent, bool rc, int n, wxSizerBehaviour behav)
1525 {
1526     Create(parent, rc, n, behav);
1527 }
1528
1529 bool wxRowColSizer::Create(wxWindowBase *parent, bool rc, int n, wxSizerBehaviour behav)
1530 {
1531     wxSizer::Create(parent, behav);
1532
1533     rowOrCol = rc;
1534     rowOrColSize = n;
1535     xSpacing = 2;
1536     ySpacing = 2;
1537
1538     return TRUE;
1539 }
1540
1541 wxRowColSizer::~wxRowColSizer()
1542 {
1543 }
1544
1545 bool wxRowColSizer::LayoutPhase1(int *noChanges)
1546 {
1547     *noChanges = 0;
1548     wxLayoutConstraints *constr = GetConstraints();
1549
1550     if (constr)
1551     {
1552         // Force the constraint to have as-is width and height
1553         // if we're in shrink-to-fit mode, because if left unconstrained,
1554         // SatisfyConstraints will fail. The shrink-to-fit option
1555         // essentially specifies the width and height as 'whatever I calculate'.
1556         if (sizerBehaviour == wxSizerShrink)
1557         {
1558             constr->width.AsIs();
1559             constr->height.AsIs();
1560         }
1561
1562         // Only evaluate the constraints FIRST if we're NOT
1563         // in shrink-to-fit mode, i.e. we want to size the rowcol
1564         // first, then lay the children out in the space we've calculated.
1565         if (sizerBehaviour != wxSizerShrink)
1566         {
1567             bool success = constr->SatisfyConstraints(this, noChanges);
1568             if (success)
1569             {
1570                 int x = constr->left.GetValue();
1571                 int y = constr->top.GetValue();
1572                 int w = constr->width.GetValue();
1573                 int h = constr->height.GetValue();
1574                 SetSize(x, y, w, h);
1575             }
1576             else
1577                 return FALSE;
1578
1579             // Continue to do the rest of the phase when the constraints have been
1580             // satisfied, i.e. we're on the last iteration of phase 1 and
1581             // can now do the actual rowcol laying out.
1582         }
1583     }
1584
1585     // If we ARE in shrink-to-fit mode, we must now
1586     // calculate the child sizes BEFORE laying out in rows or columns.
1587     if (sizerBehaviour == wxSizerShrink)
1588     {
1589         DoPhase(1);
1590         DoPhase(2);
1591
1592         // WILL THE WINDOW BE SIZED CORRECTLY AT THIS POINT?
1593         // CHECK CONSTRAINTS IF ANY...
1594         int noRows = 0;
1595         int noCols = 0;
1596         int currentX = borderX;
1597         int currentY = borderY;
1598         int maxX = currentX;
1599         int maxY = currentY;
1600
1601         wxNode *node = GetChildren().First();
1602         while (node)
1603         {
1604             wxWindowBase *win = (wxWindowBase *)node->Data();
1605             int childWidth, childHeight;
1606             if (win->GetConstraints() &&
1607                     win->GetConstraints()->width.GetDone() &&
1608                     win->GetConstraints()->height.GetDone())
1609             {
1610                 childWidth = win->GetConstraints()->width.GetValue();
1611                 childHeight = win->GetConstraints()->height.GetValue();
1612             }
1613             else
1614                 win->GetSize(&childWidth, &childHeight);
1615
1616             win->MoveConstraint(currentX, currentY);
1617
1618             if ((currentX + childWidth) > maxX)
1619                 maxX = (currentX + childWidth);
1620             if ((currentY + childHeight) > maxY)
1621                 maxY = (currentY + childHeight);
1622
1623             if (rowOrCol)
1624             {
1625                 currentX += childWidth + xSpacing;
1626                 noCols ++;
1627
1628                 // Reset to start of row
1629                 if (noCols == rowOrColSize)
1630                 {
1631                     currentX = borderX;
1632                     currentY += childHeight + ySpacing;
1633                     noCols = 0;
1634                 }
1635             }
1636             else
1637             {
1638                 currentY += childHeight + ySpacing;
1639                 noRows ++;
1640
1641                 // Reset to start of col
1642                 if (noRows == rowOrColSize)
1643                 {
1644                     currentY = borderY;
1645                     currentX += childWidth + xSpacing;
1646                     noRows = 0;
1647                 }
1648             }
1649
1650             node = node->Next();
1651         }
1652         maxX += borderX;
1653         maxY += borderY;
1654
1655         SetSize(-1, -1, maxX, maxY);
1656     }
1657     return TRUE;
1658 }
1659
1660 bool wxRowColSizer::LayoutPhase2(int *noChanges)
1661 {
1662     *noChanges = 0;
1663
1664     // If shrink-to-fit, it's only at Phase 2 that we know the size of
1665     // the wxRowColSizer, and now we can evaluate the
1666     // constraints and pass result back up to parent.
1667     // This implements a depth-first strategy
1668     if (sizerBehaviour == wxSizerShrink)
1669     {
1670         wxLayoutConstraints *constr = GetConstraints();
1671         if (constr)
1672         {
1673             bool success = constr->SatisfyConstraints(this, noChanges);
1674             if (success)
1675             {
1676                 int x = constr->left.GetValue();
1677                 int y = constr->top.GetValue();
1678                 Move(x, y);
1679             }
1680             return success;
1681         }
1682         else return TRUE;
1683     }
1684     else
1685     {
1686         // Lay out the children: breadth-first strategy.
1687         DoPhase(1);
1688         DoPhase(2);
1689
1690         // Space them
1691     }
1692     return TRUE;
1693 }
1694
1695
1696 /*
1697  * wxSpacingSizer
1698  */
1699
1700 wxSpacingSizer::wxSpacingSizer()
1701 {
1702 }
1703
1704 wxSpacingSizer::wxSpacingSizer(wxWindowBase *parent)
1705 {
1706     Create(parent);
1707 }
1708
1709 wxSpacingSizer::wxSpacingSizer(wxWindowBase *parent, wxRelationship rel, wxWindowBase *other, int spacing)
1710 {
1711     Create(parent, rel, other, spacing);
1712 }
1713
1714 bool wxSpacingSizer::Create(wxWindowBase *parent)
1715 {
1716     wxSizer::Create(parent);
1717     return TRUE;
1718 }
1719
1720 bool wxSpacingSizer::Create(wxWindowBase *parent, wxRelationship rel, wxWindowBase *other, int spacing)
1721 {
1722     wxLayoutConstraints *c = new wxLayoutConstraints;
1723
1724     wxSizer::Create(parent);
1725
1726     switch ( rel )
1727     {
1728         case wxLeftOf :
1729             c->width.Absolute    (spacing);
1730             c->top.SameAs        (other, wxTop);
1731             c->bottom.SameAs    (other, wxBottom);
1732             c->right.LeftOf        (other);
1733             break;
1734         case wxRightOf :
1735             c->width.Absolute    (spacing);
1736             c->top.SameAs        (other, wxTop);
1737             c->bottom.SameAs    (other, wxBottom);
1738             c->left.RightOf        (other);
1739             break;
1740         case wxBelow :
1741             c->height.Absolute    (spacing);
1742             c->left.SameAs        (other, wxLeft);
1743             c->right.SameAs        (other, wxRight);
1744             c->top.Below        (other);
1745             break;
1746         case wxAbove :
1747             c->height.Absolute    (spacing);
1748             c->left.SameAs        (other, wxLeft);
1749             c->right.SameAs        (other, wxRight);
1750             c->bottom.Above        (other);
1751             break;
1752
1753         default :
1754             break;
1755     }
1756     SetConstraints(c);
1757
1758     return TRUE;
1759 }
1760
1761 wxSpacingSizer::~wxSpacingSizer()
1762 {
1763 }
1764