src/common/wincmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/window.cpp
   3 // Purpose:     common (to all ports) wxWindow functions
   4 // Author:      Julian Smart, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     13/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/string.h"
  29     #include "wx/log.h"
  30     #include "wx/intl.h"
  31     #include "wx/frame.h"
  32     #include "wx/window.h"
  33     #include "wx/control.h"
  34     #include "wx/checkbox.h"
  35     #include "wx/radiobut.h"
  36     #include "wx/statbox.h"
  37     #include "wx/textctrl.h"
  38     #include "wx/settings.h"
  39     #include "wx/dialog.h"
  40     #include "wx/msgdlg.h"
  41     #include "wx/msgout.h"
  42     #include "wx/statusbr.h"
  43     #include "wx/toolbar.h"
  44     #include "wx/dcclient.h"
  45     #include "wx/scrolbar.h"
  46     #include "wx/layout.h"
  47     #include "wx/sizer.h"
  48     #include "wx/menu.h"
  49 #endif //WX_PRECOMP
  50
  51 #if wxUSE_DRAG_AND_DROP
  52     #include "wx/dnd.h"
  53 #endif // wxUSE_DRAG_AND_DROP
  54
  55 #if wxUSE_ACCESSIBILITY
  56     #include "wx/access.h"
  57 #endif
  58
  59 #if wxUSE_HELP
  60     #include "wx/cshelp.h"
  61 #endif // wxUSE_HELP
  62
  63 #if wxUSE_TOOLTIPS
  64     #include "wx/tooltip.h"
  65 #endif // wxUSE_TOOLTIPS
  66
  67 #if wxUSE_CARET
  68     #include "wx/caret.h"
  69 #endif // wxUSE_CARET
  70
  71 #if wxUSE_SYSTEM_OPTIONS
  72     #include "wx/sysopt.h"
  73 #endif
  74
  75 #include "wx/platinfo.h"
  76
  77 // Windows List
  78 WXDLLIMPEXP_DATA_CORE(wxWindowList) wxTopLevelWindows;
  79
  80 // globals
  81 #if wxUSE_MENUS
  82 wxMenu *wxCurrentPopupMenu = NULL;
  83 #endif // wxUSE_MENUS
  84
  85 // ----------------------------------------------------------------------------
  86 // static data
  87 // ----------------------------------------------------------------------------
  88
  89
  90 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  91
  92 // ----------------------------------------------------------------------------
  93 // event table
  94 // ----------------------------------------------------------------------------
  95
  96 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  97     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  98     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  99     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
 100
 101 #if wxUSE_HELP
 102     EVT_HELP(wxID_ANY, wxWindowBase::OnHelp)
 103 #endif // wxUSE_HELP
 104
 105     EVT_SIZE(wxWindowBase::InternalOnSize)
 106 END_EVENT_TABLE()
 107
 108 // ============================================================================
 109 // implementation of the common functionality of the wxWindow class
 110 // ============================================================================
 111
 112 // ----------------------------------------------------------------------------
 113 // initialization
 114 // ----------------------------------------------------------------------------
 115
 116 // the default initialization
 117 wxWindowBase::wxWindowBase()
 118 {
 119     // no window yet, no parent nor children
 120     m_parent = NULL;
 121     m_windowId = wxID_ANY;
 122
 123     // no constraints on the minimal window size
 124     m_minWidth =
 125     m_maxWidth = wxDefaultCoord;
 126     m_minHeight =
 127     m_maxHeight = wxDefaultCoord;
 128
 129     // invalidiated cache value
 130     m_bestSizeCache = wxDefaultSize;
 131
 132     // window are created enabled and visible by default
 133     m_isShown =
 134     m_isEnabled = true;
 135
 136     // the default event handler is just this window
 137     m_eventHandler = this;
 138
 139 #if wxUSE_VALIDATORS
 140     // no validator
 141     m_windowValidator = NULL;
 142 #endif // wxUSE_VALIDATORS
 143
 144     // the colours/fonts are default for now, so leave m_font,
 145     // m_backgroundColour and m_foregroundColour uninitialized and set those
 146     m_hasBgCol =
 147     m_hasFgCol =
 148     m_hasFont = false;
 149     m_inheritBgCol =
 150     m_inheritFgCol =
 151     m_inheritFont = false;
 152
 153     // no style bits
 154     m_exStyle =
 155     m_windowStyle = 0;
 156
 157     m_backgroundStyle = wxBG_STYLE_ERASE;
 158
 159 #if wxUSE_CONSTRAINTS
 160     // no constraints whatsoever
 161     m_constraints = NULL;
 162     m_constraintsInvolvedIn = NULL;
 163 #endif // wxUSE_CONSTRAINTS
 164
 165     m_windowSizer = NULL;
 166     m_containingSizer = NULL;
 167     m_autoLayout = false;
 168
 169 #if wxUSE_DRAG_AND_DROP
 170     m_dropTarget = NULL;
 171 #endif // wxUSE_DRAG_AND_DROP
 172
 173 #if wxUSE_TOOLTIPS
 174     m_tooltip = NULL;
 175 #endif // wxUSE_TOOLTIPS
 176
 177 #if wxUSE_CARET
 178     m_caret = NULL;
 179 #endif // wxUSE_CARET
 180
 181 #if wxUSE_PALETTE
 182     m_hasCustomPalette = false;
 183 #endif // wxUSE_PALETTE
 184
 185 #if wxUSE_ACCESSIBILITY
 186     m_accessible = NULL;
 187 #endif
 188
 189     m_virtualSize = wxDefaultSize;
 190
 191     m_scrollHelper = NULL;
 192
 193     m_windowVariant = wxWINDOW_VARIANT_NORMAL;
 194 #if wxUSE_SYSTEM_OPTIONS
 195     if ( wxSystemOptions::HasOption(wxWINDOW_DEFAULT_VARIANT) )
 196     {
 197        m_windowVariant = (wxWindowVariant) wxSystemOptions::GetOptionInt( wxWINDOW_DEFAULT_VARIANT ) ;
 198     }
 199 #endif
 200
 201     // Whether we're using the current theme for this window (wxGTK only for now)
 202     m_themeEnabled = false;
 203
 204     // This is set to true by SendDestroyEvent() which should be called by the
 205     // most derived class to ensure that the destruction event is sent as soon
 206     // as possible to allow its handlers to still see the undestroyed window
 207     m_isBeingDeleted = false;
 208
 209     m_freezeCount = 0;
 210 }
 211
 212 // common part of window creation process
 213 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 214                               wxWindowID id,
 215                               const wxPoint& WXUNUSED(pos),
 216                               const wxSize& WXUNUSED(size),
 217                               long style,
 218                               const wxValidator& wxVALIDATOR_PARAM(validator),
 219                               const wxString& name)
 220 {
 221     // ids are limited to 16 bits under MSW so if you care about portability,
 222     // it's not a good idea to use ids out of this range (and negative ids are
 223     // reserved for wxWidgets own usage)
 224     wxASSERT_MSG( id == wxID_ANY || (id >= 0 && id < 32767) ||
 225                   (id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST),
 226                   wxT("invalid id value") );
 227
 228     // generate a new id if the user doesn't care about it
 229     if ( id == wxID_ANY )
 230     {
 231         m_windowId = NewControlId();
 232     }
 233     else // valid id specified
 234     {
 235         m_windowId = id;
 236     }
 237
 238     // don't use SetWindowStyleFlag() here, this function should only be called
 239     // to change the flag after creation as it tries to reflect the changes in
 240     // flags by updating the window dynamically and we don't need this here
 241     m_windowStyle = style;
 242
 243     SetName(name);
 244     SetParent(parent);
 245
 246 #if wxUSE_VALIDATORS
 247     SetValidator(validator);
 248 #endif // wxUSE_VALIDATORS
 249
 250     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 251     // have it too - like this it's possible to set it only in the top level
 252     // dialog/frame and all children will inherit it by defult
 253     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 254     {
 255         SetExtraStyle(GetExtraStyle() | wxWS_EX_VALIDATE_RECURSIVELY);
 256     }
 257
 258     return true;
 259 }
 260
 261 bool wxWindowBase::ToggleWindowStyle(int flag)
 262 {
 263     wxASSERT_MSG( flag, wxT("flags with 0 value can't be toggled") );
 264
 265     bool rc;
 266     long style = GetWindowStyleFlag();
 267     if ( style & flag )
 268     {
 269         style &= ~flag;
 270         rc = false;
 271     }
 272     else // currently off
 273     {
 274         style |= flag;
 275         rc = true;
 276     }
 277
 278     SetWindowStyleFlag(style);
 279
 280     return rc;
 281 }
 282
 283 // ----------------------------------------------------------------------------
 284 // destruction
 285 // ----------------------------------------------------------------------------
 286
 287 // common clean up
 288 wxWindowBase::~wxWindowBase()
 289 {
 290     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 291
 292     // FIXME if these 2 cases result from programming errors in the user code
 293     //       we should probably assert here instead of silently fixing them
 294
 295     // Just in case the window has been Closed, but we're then deleting
 296     // immediately: don't leave dangling pointers.
 297     wxPendingDelete.DeleteObject(this);
 298
 299     // Just in case we've loaded a top-level window via LoadNativeDialog but
 300     // we weren't a dialog class
 301     wxTopLevelWindows.DeleteObject((wxWindow*)this);
 302
 303 #if wxUSE_MENUS
 304     // The associated popup menu can still be alive, disassociate from it in
 305     // this case
 306     if ( wxCurrentPopupMenu && wxCurrentPopupMenu->GetInvokingWindow() == this )
 307         wxCurrentPopupMenu->SetInvokingWindow(NULL);
 308 #endif // wxUSE_MENUS
 309
 310     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 311
 312     // notify the parent about this window destruction
 313     if ( m_parent )
 314         m_parent->RemoveChild(this);
 315
 316 #if wxUSE_CARET
 317     delete m_caret;
 318 #endif // wxUSE_CARET
 319
 320 #if wxUSE_VALIDATORS
 321     delete m_windowValidator;
 322 #endif // wxUSE_VALIDATORS
 323
 324 #if wxUSE_CONSTRAINTS
 325     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 326     // at deleted windows as they delete themselves.
 327     DeleteRelatedConstraints();
 328
 329     if ( m_constraints )
 330     {
 331         // This removes any dangling pointers to this window in other windows'
 332         // constraintsInvolvedIn lists.
 333         UnsetConstraints(m_constraints);
 334         delete m_constraints;
 335         m_constraints = NULL;
 336     }
 337 #endif // wxUSE_CONSTRAINTS
 338
 339     if ( m_containingSizer )
 340         m_containingSizer->Detach( (wxWindow*)this );
 341
 342     delete m_windowSizer;
 343
 344 #if wxUSE_DRAG_AND_DROP
 345     delete m_dropTarget;
 346 #endif // wxUSE_DRAG_AND_DROP
 347
 348 #if wxUSE_TOOLTIPS
 349     delete m_tooltip;
 350 #endif // wxUSE_TOOLTIPS
 351
 352 #if wxUSE_ACCESSIBILITY
 353     delete m_accessible;
 354 #endif
 355
 356 #if wxUSE_HELP
 357     // NB: this has to be called unconditionally, because we don't know
 358     //     whether this window has associated help text or not
 359     wxHelpProvider *helpProvider = wxHelpProvider::Get();
 360     if ( helpProvider )
 361         helpProvider->RemoveHelp(this);
 362 #endif
 363 }
 364
 365 bool wxWindowBase::IsBeingDeleted() const
 366 {
 367     return m_isBeingDeleted ||
 368             (!IsTopLevel() && m_parent && m_parent->IsBeingDeleted());
 369 }
 370
 371 void wxWindowBase::SendDestroyEvent()
 372 {
 373     if ( m_isBeingDeleted )
 374     {
 375         // we could have been already called from a more derived class dtor,
 376         // e.g. ~wxTLW calls us and so does ~wxWindow and the latter call
 377         // should be simply ignored
 378         return;
 379     }
 380
 381     m_isBeingDeleted = true;
 382
 383     wxWindowDestroyEvent event;
 384     event.SetEventObject(this);
 385     event.SetId(GetId());
 386     GetEventHandler()->ProcessEvent(event);
 387 }
 388
 389 bool wxWindowBase::Destroy()
 390 {
 391     SendDestroyEvent();
 392
 393     delete this;
 394
 395     return true;
 396 }
 397
 398 bool wxWindowBase::Close(bool force)
 399 {
 400     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 401     event.SetEventObject(this);
 402     event.SetCanVeto(!force);
 403
 404     // return false if window wasn't closed because the application vetoed the
 405     // close event
 406     return HandleWindowEvent(event) && !event.GetVeto();
 407 }
 408
 409 bool wxWindowBase::DestroyChildren()
 410 {
 411     wxWindowList::compatibility_iterator node;
 412     for ( ;; )
 413     {
 414         // we iterate until the list becomes empty
 415         node = GetChildren().GetFirst();
 416         if ( !node )
 417             break;
 418
 419         wxWindow *child = node->GetData();
 420
 421         // note that we really want to delete it immediately so don't call the
 422         // possible overridden Destroy() version which might not delete the
 423         // child immediately resulting in problems with our (top level) child
 424         // outliving its parent
 425         child->wxWindowBase::Destroy();
 426
 427         wxASSERT_MSG( !GetChildren().Find(child),
 428                       wxT("child didn't remove itself using RemoveChild()") );
 429     }
 430
 431     return true;
 432 }
 433
 434 // ----------------------------------------------------------------------------
 435 // size/position related methods
 436 // ----------------------------------------------------------------------------
 437
 438 // centre the window with respect to its parent in either (or both) directions
 439 void wxWindowBase::DoCentre(int dir)
 440 {
 441     wxCHECK_RET( !(dir & wxCENTRE_ON_SCREEN) && GetParent(),
 442                  wxT("this method only implements centering child windows") );
 443
 444     SetSize(GetRect().CentreIn(GetParent()->GetClientSize(), dir));
 445 }
 446
 447 // fits the window around the children
 448 void wxWindowBase::Fit()
 449 {
 450     if ( !GetChildren().empty() )
 451     {
 452         SetSize(GetBestSize());
 453     }
 454     //else: do nothing if we have no children
 455 }
 456
 457 // fits virtual size (ie. scrolled area etc.) around children
 458 void wxWindowBase::FitInside()
 459 {
 460     if ( GetChildren().GetCount() > 0 )
 461     {
 462         SetVirtualSize( GetBestVirtualSize() );
 463     }
 464 }
 465
 466 // On Mac, scrollbars are explicitly children.
 467 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 468 static bool wxHasRealChildren(const wxWindowBase* win)
 469 {
 470     int realChildCount = 0;
 471
 472     for ( wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 473           node;
 474           node = node->GetNext() )
 475     {
 476         wxWindow *win = node->GetData();
 477         if ( !win->IsTopLevel() && win->IsShown()
 478 #if wxUSE_SCROLLBAR
 479             && !win->IsKindOf(CLASSINFO(wxScrollBar))
 480 #endif
 481             )
 482             realChildCount ++;
 483     }
 484     return (realChildCount > 0);
 485 }
 486 #endif
 487
 488 void wxWindowBase::InvalidateBestSize()
 489 {
 490     m_bestSizeCache = wxDefaultSize;
 491
 492     // parent's best size calculation may depend on its children's
 493     // as long as child window we are in is not top level window itself
 494     // (because the TLW size is never resized automatically)
 495     // so let's invalidate it as well to be safe:
 496     if (m_parent && !IsTopLevel())
 497         m_parent->InvalidateBestSize();
 498 }
 499
 500 // return the size best suited for the current window
 501 wxSize wxWindowBase::DoGetBestSize() const
 502 {
 503     wxSize best;
 504
 505     if ( m_windowSizer )
 506     {
 507         best = m_windowSizer->GetMinSize();
 508     }
 509 #if wxUSE_CONSTRAINTS
 510     else if ( m_constraints )
 511     {
 512         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 513
 514         // our minimal acceptable size is such that all our windows fit inside
 515         int maxX = 0,
 516             maxY = 0;
 517
 518         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 519               node;
 520               node = node->GetNext() )
 521         {
 522             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 523             if ( !c )
 524             {
 525                 // it's not normal that we have an unconstrained child, but
 526                 // what can we do about it?
 527                 continue;
 528             }
 529
 530             int x = c->right.GetValue(),
 531                 y = c->bottom.GetValue();
 532
 533             if ( x > maxX )
 534                 maxX = x;
 535
 536             if ( y > maxY )
 537                 maxY = y;
 538
 539             // TODO: we must calculate the overlaps somehow, otherwise we
 540             //       will never return a size bigger than the current one :-(
 541         }
 542
 543         best = wxSize(maxX, maxY);
 544     }
 545 #endif // wxUSE_CONSTRAINTS
 546     else if ( !GetChildren().empty()
 547 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 548               && wxHasRealChildren(this)
 549 #endif
 550               )
 551     {
 552         // our minimal acceptable size is such that all our visible child
 553         // windows fit inside
 554         int maxX = 0,
 555             maxY = 0;
 556
 557         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 558               node;
 559               node = node->GetNext() )
 560         {
 561             wxWindow *win = node->GetData();
 562             if ( win->IsTopLevel()
 563                     || !win->IsShown()
 564 #if wxUSE_STATUSBAR
 565                         || wxDynamicCast(win, wxStatusBar)
 566 #endif // wxUSE_STATUSBAR
 567                )
 568             {
 569                 // dialogs and frames lie in different top level windows -
 570                 // don't deal with them here; as for the status bars, they
 571                 // don't lie in the client area at all
 572                 continue;
 573             }
 574
 575             int wx, wy, ww, wh;
 576             win->GetPosition(&wx, &wy);
 577
 578             // if the window hadn't been positioned yet, assume that it is in
 579             // the origin
 580             if ( wx == wxDefaultCoord )
 581                 wx = 0;
 582             if ( wy == wxDefaultCoord )
 583                 wy = 0;
 584
 585             win->GetSize(&ww, &wh);
 586             if ( wx + ww > maxX )
 587                 maxX = wx + ww;
 588             if ( wy + wh > maxY )
 589                 maxY = wy + wh;
 590         }
 591
 592         best = wxSize(maxX, maxY);
 593     }
 594     else // ! has children
 595     {
 596         // for a generic window there is no natural best size so, if the
 597         // minimal size is not set, use the current size but take care to
 598         // remember it as minimal size for the next time because our best size
 599         // should be constant: otherwise we could get into a situation when the
 600         // window is initially at some size, then expanded to a larger size and
 601         // then, when the containing window is shrunk back (because our initial
 602         // best size had been used for computing the parent min size), we can't
 603         // be shrunk back any more because our best size is now bigger
 604         wxSize size = GetMinSize();
 605         if ( !size.IsFullySpecified() )
 606         {
 607             size.SetDefaults(GetSize());
 608             wxConstCast(this, wxWindowBase)->SetMinSize(size);
 609         }
 610
 611         // return as-is, unadjusted by the client size difference.
 612         return size;
 613     }
 614
 615     // Add any difference between size and client size
 616     wxSize diff = GetSize() - GetClientSize();
 617     best.x += wxMax(0, diff.x);
 618     best.y += wxMax(0, diff.y);
 619
 620     return best;
 621 }
 622
 623 // helper of GetWindowBorderSize(): as many ports don't implement support for
 624 // wxSYS_BORDER/EDGE_X/Y metrics in their wxSystemSettings, use hard coded
 625 // fallbacks in this case
 626 static int wxGetMetricOrDefault(wxSystemMetric what, const wxWindowBase* win)
 627 {
 628     int rc = wxSystemSettings::GetMetric(
 629         what, static_cast<wxWindow*>(const_cast<wxWindowBase*>(win)));
 630     if ( rc == -1 )
 631     {
 632         switch ( what )
 633         {
 634             case wxSYS_BORDER_X:
 635             case wxSYS_BORDER_Y:
 636                 // 2D border is by default 1 pixel wide
 637                 rc = 1;
 638                 break;
 639
 640             case wxSYS_EDGE_X:
 641             case wxSYS_EDGE_Y:
 642                 // 3D borders are by default 2 pixels
 643                 rc = 2;
 644                 break;
 645
 646             default:
 647                 wxFAIL_MSG( wxT("unexpected wxGetMetricOrDefault() argument") );
 648                 rc = 0;
 649         }
 650     }
 651
 652     return rc;
 653 }
 654
 655 wxSize wxWindowBase::GetWindowBorderSize() const
 656 {
 657     wxSize size;
 658
 659     switch ( GetBorder() )
 660     {
 661         case wxBORDER_NONE:
 662             // nothing to do, size is already (0, 0)
 663             break;
 664
 665         case wxBORDER_SIMPLE:
 666         case wxBORDER_STATIC:
 667             size.x = wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 668             size.y = wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 669             break;
 670
 671         case wxBORDER_SUNKEN:
 672         case wxBORDER_RAISED:
 673             size.x = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_X, this),
 674                            wxGetMetricOrDefault(wxSYS_BORDER_X, this));
 675             size.y = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_Y, this),
 676                            wxGetMetricOrDefault(wxSYS_BORDER_Y, this));
 677             break;
 678
 679         case wxBORDER_DOUBLE:
 680             size.x = wxGetMetricOrDefault(wxSYS_EDGE_X, this) +
 681                         wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 682             size.y = wxGetMetricOrDefault(wxSYS_EDGE_Y, this) +
 683                         wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 684             break;
 685
 686         default:
 687             wxFAIL_MSG(wxT("Unknown border style."));
 688             break;
 689     }
 690
 691     // we have borders on both sides
 692     return size*2;
 693 }
 694
 695 wxSize wxWindowBase::GetEffectiveMinSize() const
 696 {
 697     // merge the best size with the min size, giving priority to the min size
 698     wxSize min = GetMinSize();
 699
 700     if (min.x == wxDefaultCoord || min.y == wxDefaultCoord)
 701     {
 702         wxSize best = GetBestSize();
 703         if (min.x == wxDefaultCoord) min.x =  best.x;
 704         if (min.y == wxDefaultCoord) min.y =  best.y;
 705     }
 706
 707     return min;
 708 }
 709
 710 wxSize wxWindowBase::GetBestSize() const
 711 {
 712     if ( !m_windowSizer && m_bestSizeCache.IsFullySpecified() )
 713         return m_bestSizeCache;
 714
 715     // call DoGetBestClientSize() first, if a derived class overrides it wants
 716     // it to be used
 717     wxSize size = DoGetBestClientSize();
 718     if ( size != wxDefaultSize )
 719     {
 720         size += DoGetBorderSize();
 721
 722         CacheBestSize(size);
 723         return size;
 724     }
 725
 726     return DoGetBestSize();
 727 }
 728
 729 void wxWindowBase::SetMinSize(const wxSize& minSize)
 730 {
 731     m_minWidth = minSize.x;
 732     m_minHeight = minSize.y;
 733 }
 734
 735 void wxWindowBase::SetMaxSize(const wxSize& maxSize)
 736 {
 737     m_maxWidth = maxSize.x;
 738     m_maxHeight = maxSize.y;
 739 }
 740
 741 void wxWindowBase::SetInitialSize(const wxSize& size)
 742 {
 743     // Set the min size to the size passed in.  This will usually either be
 744     // wxDefaultSize or the size passed to this window's ctor/Create function.
 745     SetMinSize(size);
 746
 747     // Merge the size with the best size if needed
 748     wxSize best = GetEffectiveMinSize();
 749
 750     // If the current size doesn't match then change it
 751     if (GetSize() != best)
 752         SetSize(best);
 753 }
 754
 755
 756 // by default the origin is not shifted
 757 wxPoint wxWindowBase::GetClientAreaOrigin() const
 758 {
 759     return wxPoint(0,0);
 760 }
 761
 762 wxSize wxWindowBase::ClientToWindowSize(const wxSize& size) const
 763 {
 764     const wxSize diff(GetSize() - GetClientSize());
 765
 766     return wxSize(size.x == -1 ? -1 : size.x + diff.x,
 767                   size.y == -1 ? -1 : size.y + diff.y);
 768 }
 769
 770 wxSize wxWindowBase::WindowToClientSize(const wxSize& size) const
 771 {
 772     const wxSize diff(GetSize() - GetClientSize());
 773
 774     return wxSize(size.x == -1 ? -1 : size.x - diff.x,
 775                   size.y == -1 ? -1 : size.y - diff.y);
 776 }
 777
 778 void wxWindowBase::SetWindowVariant( wxWindowVariant variant )
 779 {
 780     if ( m_windowVariant != variant )
 781     {
 782         m_windowVariant = variant;
 783
 784         DoSetWindowVariant(variant);
 785     }
 786 }
 787
 788 void wxWindowBase::DoSetWindowVariant( wxWindowVariant variant )
 789 {
 790     // adjust the font height to correspond to our new variant (notice that
 791     // we're only called if something really changed)
 792     wxFont font = GetFont();
 793     int size = font.GetPointSize();
 794     switch ( variant )
 795     {
 796         case wxWINDOW_VARIANT_NORMAL:
 797             break;
 798
 799         case wxWINDOW_VARIANT_SMALL:
 800             size *= 3;
 801             size /= 4;
 802             break;
 803
 804         case wxWINDOW_VARIANT_MINI:
 805             size *= 2;
 806             size /= 3;
 807             break;
 808
 809         case wxWINDOW_VARIANT_LARGE:
 810             size *= 5;
 811             size /= 4;
 812             break;
 813
 814         default:
 815             wxFAIL_MSG(wxT("unexpected window variant"));
 816             break;
 817     }
 818
 819     font.SetPointSize(size);
 820     SetFont(font);
 821 }
 822
 823 void wxWindowBase::DoSetSizeHints( int minW, int minH,
 824                                    int maxW, int maxH,
 825                                    int WXUNUSED(incW), int WXUNUSED(incH) )
 826 {
 827     wxCHECK_RET( (minW == wxDefaultCoord || maxW == wxDefaultCoord || minW <= maxW) &&
 828                     (minH == wxDefaultCoord || maxH == wxDefaultCoord || minH <= maxH),
 829                  wxT("min width/height must be less than max width/height!") );
 830
 831     m_minWidth = minW;
 832     m_maxWidth = maxW;
 833     m_minHeight = minH;
 834     m_maxHeight = maxH;
 835 }
 836
 837
 838 #if WXWIN_COMPATIBILITY_2_8
 839 void wxWindowBase::SetVirtualSizeHints(int WXUNUSED(minW), int WXUNUSED(minH),
 840                                        int WXUNUSED(maxW), int WXUNUSED(maxH))
 841 {
 842 }
 843
 844 void wxWindowBase::SetVirtualSizeHints(const wxSize& WXUNUSED(minsize),
 845                                        const wxSize& WXUNUSED(maxsize))
 846 {
 847 }
 848 #endif // WXWIN_COMPATIBILITY_2_8
 849
 850 void wxWindowBase::DoSetVirtualSize( int x, int y )
 851 {
 852     m_virtualSize = wxSize(x, y);
 853 }
 854
 855 wxSize wxWindowBase::DoGetVirtualSize() const
 856 {
 857     // we should use the entire client area so if it is greater than our
 858     // virtual size, expand it to fit (otherwise if the window is big enough we
 859     // wouldn't be using parts of it)
 860     wxSize size = GetClientSize();
 861     if ( m_virtualSize.x > size.x )
 862         size.x = m_virtualSize.x;
 863
 864     if ( m_virtualSize.y >= size.y )
 865         size.y = m_virtualSize.y;
 866
 867     return size;
 868 }
 869
 870 void wxWindowBase::DoGetScreenPosition(int *x, int *y) const
 871 {
 872     // screen position is the same as (0, 0) in client coords for non TLWs (and
 873     // TLWs override this method)
 874     if ( x )
 875         *x = 0;
 876     if ( y )
 877         *y = 0;
 878
 879     ClientToScreen(x, y);
 880 }
 881
 882 void wxWindowBase::SendSizeEvent(int flags)
 883 {
 884     wxSizeEvent event(GetSize(), GetId());
 885     event.SetEventObject(this);
 886     if ( flags & wxSEND_EVENT_POST )
 887         wxPostEvent(this, event);
 888     else
 889         HandleWindowEvent(event);
 890 }
 891
 892 void wxWindowBase::SendSizeEventToParent(int flags)
 893 {
 894     wxWindow * const parent = GetParent();
 895     if ( parent && !parent->IsBeingDeleted() )
 896         parent->SendSizeEvent(flags);
 897 }
 898
 899 // ----------------------------------------------------------------------------
 900 // show/hide/enable/disable the window
 901 // ----------------------------------------------------------------------------
 902
 903 bool wxWindowBase::Show(bool show)
 904 {
 905     if ( show != m_isShown )
 906     {
 907         m_isShown = show;
 908
 909         return true;
 910     }
 911     else
 912     {
 913         return false;
 914     }
 915 }
 916
 917 bool wxWindowBase::IsEnabled() const
 918 {
 919     return IsThisEnabled() && (IsTopLevel() || !GetParent() || GetParent()->IsEnabled());
 920 }
 921
 922 void wxWindowBase::NotifyWindowOnEnableChange(bool enabled)
 923 {
 924 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
 925     DoEnable(enabled);
 926 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 927
 928     OnEnabled(enabled);
 929
 930     // If we are top-level then the logic doesn't apply - otherwise
 931     // showing a modal dialog would result in total greying out (and ungreying
 932     // out later) of everything which would be really ugly
 933     if ( IsTopLevel() )
 934         return;
 935
 936     for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 937           node;
 938           node = node->GetNext() )
 939     {
 940         wxWindowBase * const child = node->GetData();
 941         if ( !child->IsTopLevel() && child->IsThisEnabled() )
 942             child->NotifyWindowOnEnableChange(enabled);
 943     }
 944 }
 945
 946 bool wxWindowBase::Enable(bool enable)
 947 {
 948     if ( enable == IsThisEnabled() )
 949         return false;
 950
 951     m_isEnabled = enable;
 952
 953 #ifdef wxHAS_NATIVE_ENABLED_MANAGEMENT
 954     DoEnable(enable);
 955 #else // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 956     wxWindowBase * const parent = GetParent();
 957     if( !IsTopLevel() && parent && !parent->IsEnabled() )
 958     {
 959         return true;
 960     }
 961 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 962
 963     NotifyWindowOnEnableChange(enable);
 964
 965     return true;
 966 }
 967
 968 bool wxWindowBase::IsShownOnScreen() const
 969 {
 970     // A window is shown on screen if it itself is shown and so are all its
 971     // parents. But if a window is toplevel one, then its always visible on
 972     // screen if IsShown() returns true, even if it has a hidden parent.
 973     return IsShown() &&
 974            (IsTopLevel() || GetParent() == NULL || GetParent()->IsShownOnScreen());
 975 }
 976
 977 // ----------------------------------------------------------------------------
 978 // RTTI
 979 // ----------------------------------------------------------------------------
 980
 981 bool wxWindowBase::IsTopLevel() const
 982 {
 983     return false;
 984 }
 985
 986 // ----------------------------------------------------------------------------
 987 // Freeze/Thaw
 988 // ----------------------------------------------------------------------------
 989
 990 void wxWindowBase::Freeze()
 991 {
 992     if ( !m_freezeCount++ )
 993     {
 994         // physically freeze this window:
 995         DoFreeze();
 996
 997         // and recursively freeze all children:
 998         for ( wxWindowList::iterator i = GetChildren().begin();
 999               i != GetChildren().end(); ++i )
1000         {
1001             wxWindow *child = *i;
1002             if ( child->IsTopLevel() )
1003                 continue;
1004
1005             child->Freeze();
1006         }
1007     }
1008 }
1009
1010 void wxWindowBase::Thaw()
1011 {
1012     wxASSERT_MSG( m_freezeCount, "Thaw() without matching Freeze()" );
1013
1014     if ( !--m_freezeCount )
1015     {
1016         // recursively thaw all children:
1017         for ( wxWindowList::iterator i = GetChildren().begin();
1018               i != GetChildren().end(); ++i )
1019         {
1020             wxWindow *child = *i;
1021             if ( child->IsTopLevel() )
1022                 continue;
1023
1024             child->Thaw();
1025         }
1026
1027         // physically thaw this window:
1028         DoThaw();
1029     }
1030 }
1031
1032 // ----------------------------------------------------------------------------
1033 // reparenting the window
1034 // ----------------------------------------------------------------------------
1035
1036 void wxWindowBase::AddChild(wxWindowBase *child)
1037 {
1038     wxCHECK_RET( child, wxT("can't add a NULL child") );
1039
1040     // this should never happen and it will lead to a crash later if it does
1041     // because RemoveChild() will remove only one node from the children list
1042     // and the other(s) one(s) will be left with dangling pointers in them
1043     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), wxT("AddChild() called twice") );
1044
1045     GetChildren().Append((wxWindow*)child);
1046     child->SetParent(this);
1047
1048     // adding a child while frozen will assert when thawed, so freeze it as if
1049     // it had been already present when we were frozen
1050     if ( IsFrozen() && !child->IsTopLevel() )
1051         child->Freeze();
1052 }
1053
1054 void wxWindowBase::RemoveChild(wxWindowBase *child)
1055 {
1056     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1057
1058     // removing a child while frozen may result in permanently frozen window
1059     // if used e.g. from Reparent(), so thaw it
1060     //
1061     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1062     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1063     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1064         child->Thaw();
1065
1066     GetChildren().DeleteObject((wxWindow *)child);
1067     child->SetParent(NULL);
1068 }
1069
1070 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1071 {
1072     wxWindow *oldParent = GetParent();
1073     if ( newParent == oldParent )
1074     {
1075         // nothing done
1076         return false;
1077     }
1078
1079     const bool oldEnabledState = IsEnabled();
1080
1081     // unlink this window from the existing parent.
1082     if ( oldParent )
1083     {
1084         oldParent->RemoveChild(this);
1085     }
1086     else
1087     {
1088         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1089     }
1090
1091     // add it to the new one
1092     if ( newParent )
1093     {
1094         newParent->AddChild(this);
1095     }
1096     else
1097     {
1098         wxTopLevelWindows.Append((wxWindow *)this);
1099     }
1100
1101     // We need to notify window (and its subwindows) if by changing the parent
1102     // we also change our enabled/disabled status.
1103     const bool newEnabledState = IsEnabled();
1104     if ( newEnabledState != oldEnabledState )
1105     {
1106         NotifyWindowOnEnableChange(newEnabledState);
1107     }
1108
1109     return true;
1110 }
1111
1112 // ----------------------------------------------------------------------------
1113 // event handler stuff
1114 // ----------------------------------------------------------------------------
1115
1116 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1117 {
1118     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1119
1120     m_eventHandler = handler;
1121 }
1122
1123 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1124 {
1125     // disable wxEvtHandler chain mechanism for wxWindows:
1126     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1127
1128     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1129 }
1130 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1131 {
1132     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1133     // handler of our stack when is destroyed will be Unlink()ed and thus
1134     // will call this function to update the pointer of this window...
1135
1136     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1137 }
1138
1139 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1140 {
1141     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1142
1143     // the new handler is going to be part of the wxWindow stack of event handlers:
1144     // it can't be part also of an event handler double-linked chain:
1145     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1146         "The handler being pushed in the wxWindow stack shouldn't be part of "
1147         "a wxEvtHandler chain; call Unlink() on it first");
1148
1149     wxEvtHandler *handlerOld = GetEventHandler();
1150     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1151
1152     // now use wxEvtHandler double-linked list to implement a stack:
1153     handlerToPush->SetNextHandler(handlerOld);
1154
1155     if (handlerOld != this)
1156         handlerOld->SetPreviousHandler(handlerToPush);
1157
1158     SetEventHandler(handlerToPush);
1159
1160 #if wxDEBUG_LEVEL
1161     // final checks of the operations done above:
1162     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1163         "the first handler of the wxWindow stack should "
1164         "have no previous handlers set" );
1165     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1166         "the first handler of the wxWindow stack should "
1167         "have non-NULL next handler" );
1168
1169     wxEvtHandler* pLast = handlerToPush;
1170     while ( pLast && pLast != this )
1171         pLast = pLast->GetNextHandler();
1172     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1173         "the last handler of the wxWindow stack should "
1174         "have this window as next handler" );
1175 #endif // wxDEBUG_LEVEL
1176 }
1177
1178 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1179 {
1180     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1181
1182     wxEvtHandler *firstHandler = GetEventHandler();
1183     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1184     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1185     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1186         "the first handler of the wxWindow stack should have no previous handlers set" );
1187
1188     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1189     wxCHECK_MSG( secondHandler != NULL, NULL,
1190         "the first handler of the wxWindow stack should have non-NULL next handler" );
1191
1192     firstHandler->SetNextHandler(NULL);
1193     secondHandler->SetPreviousHandler(NULL);
1194
1195     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1196     SetEventHandler(secondHandler);
1197
1198     if ( deleteHandler )
1199     {
1200         delete firstHandler;
1201         firstHandler = NULL;
1202     }
1203
1204     return firstHandler;
1205 }
1206
1207 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1208 {
1209     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1210     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1211
1212     if (handlerToRemove == GetEventHandler())
1213     {
1214         // removing the first event handler is equivalent to "popping" the stack
1215         PopEventHandler(false);
1216         return true;
1217     }
1218
1219     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1220     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1221     while ( handlerCur != this )
1222     {
1223         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1224
1225         if ( handlerCur == handlerToRemove )
1226         {
1227             handlerCur->Unlink();
1228
1229             wxASSERT_MSG( handlerCur != GetEventHandler(),
1230                         "the case Remove == Pop should was already handled" );
1231             return true;
1232         }
1233
1234         handlerCur = handlerNext;
1235     }
1236
1237     wxFAIL_MSG( wxT("where has the event handler gone?") );
1238
1239     return false;
1240 }
1241
1242 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1243 {
1244     // SafelyProcessEvent() will handle exceptions nicely
1245     return GetEventHandler()->SafelyProcessEvent(event);
1246 }
1247
1248 // ----------------------------------------------------------------------------
1249 // colours, fonts &c
1250 // ----------------------------------------------------------------------------
1251
1252 void wxWindowBase::InheritAttributes()
1253 {
1254     const wxWindowBase * const parent = GetParent();
1255     if ( !parent )
1256         return;
1257
1258     // we only inherit attributes which had been explicitly set for the parent
1259     // which ensures that this only happens if the user really wants it and
1260     // not by default which wouldn't make any sense in modern GUIs where the
1261     // controls don't all use the same fonts (nor colours)
1262     if ( parent->m_inheritFont && !m_hasFont )
1263         SetFont(parent->GetFont());
1264
1265     // in addition, there is a possibility to explicitly forbid inheriting
1266     // colours at each class level by overriding ShouldInheritColours()
1267     if ( ShouldInheritColours() )
1268     {
1269         if ( parent->m_inheritFgCol && !m_hasFgCol )
1270             SetForegroundColour(parent->GetForegroundColour());
1271
1272         // inheriting (solid) background colour is wrong as it totally breaks
1273         // any kind of themed backgrounds
1274         //
1275         // instead, the controls should use the same background as their parent
1276         // (ideally by not drawing it at all)
1277 #if 0
1278         if ( parent->m_inheritBgCol && !m_hasBgCol )
1279             SetBackgroundColour(parent->GetBackgroundColour());
1280 #endif // 0
1281     }
1282 }
1283
1284 /* static */ wxVisualAttributes
1285 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1286 {
1287     // it is important to return valid values for all attributes from here,
1288     // GetXXX() below rely on this
1289     wxVisualAttributes attrs;
1290     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1291     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1292
1293     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1294     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1295     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1296     // colour on other platforms.
1297
1298 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1299     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1300 #else
1301     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1302 #endif
1303     return attrs;
1304 }
1305
1306 wxColour wxWindowBase::GetBackgroundColour() const
1307 {
1308     if ( !m_backgroundColour.IsOk() )
1309     {
1310         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1311
1312         // get our default background colour
1313         wxColour colBg = GetDefaultAttributes().colBg;
1314
1315         // we must return some valid colour to avoid redoing this every time
1316         // and also to avoid surprizing the applications written for older
1317         // wxWidgets versions where GetBackgroundColour() always returned
1318         // something -- so give them something even if it doesn't make sense
1319         // for this window (e.g. it has a themed background)
1320         if ( !colBg.Ok() )
1321             colBg = GetClassDefaultAttributes().colBg;
1322
1323         return colBg;
1324     }
1325     else
1326         return m_backgroundColour;
1327 }
1328
1329 wxColour wxWindowBase::GetForegroundColour() const
1330 {
1331     // logic is the same as above
1332     if ( !m_hasFgCol && !m_foregroundColour.Ok() )
1333     {
1334         wxColour colFg = GetDefaultAttributes().colFg;
1335
1336         if ( !colFg.IsOk() )
1337             colFg = GetClassDefaultAttributes().colFg;
1338
1339         return colFg;
1340     }
1341     else
1342         return m_foregroundColour;
1343 }
1344
1345 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1346 {
1347     if ( colour == m_backgroundColour )
1348         return false;
1349
1350     m_hasBgCol = colour.IsOk();
1351
1352     m_inheritBgCol = m_hasBgCol;
1353     m_backgroundColour = colour;
1354     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.Ok() );
1355     return true;
1356 }
1357
1358 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1359 {
1360     if (colour == m_foregroundColour )
1361         return false;
1362
1363     m_hasFgCol = colour.IsOk();
1364     m_inheritFgCol = m_hasFgCol;
1365     m_foregroundColour = colour;
1366     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.Ok() );
1367     return true;
1368 }
1369
1370 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1371 {
1372     // setting an invalid cursor is ok, it means that we don't have any special
1373     // cursor
1374     if ( m_cursor.IsSameAs(cursor) )
1375     {
1376         // no change
1377         return false;
1378     }
1379
1380     m_cursor = cursor;
1381
1382     return true;
1383 }
1384
1385 wxFont wxWindowBase::GetFont() const
1386 {
1387     // logic is the same as in GetBackgroundColour()
1388     if ( !m_font.IsOk() )
1389     {
1390         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1391
1392         wxFont font = GetDefaultAttributes().font;
1393         if ( !font.IsOk() )
1394             font = GetClassDefaultAttributes().font;
1395
1396         return font;
1397     }
1398     else
1399         return m_font;
1400 }
1401
1402 bool wxWindowBase::SetFont(const wxFont& font)
1403 {
1404     if ( font == m_font )
1405     {
1406         // no change
1407         return false;
1408     }
1409
1410     m_font = font;
1411     m_hasFont = font.IsOk();
1412     m_inheritFont = m_hasFont;
1413
1414     InvalidateBestSize();
1415
1416     return true;
1417 }
1418
1419 #if wxUSE_PALETTE
1420
1421 void wxWindowBase::SetPalette(const wxPalette& pal)
1422 {
1423     m_hasCustomPalette = true;
1424     m_palette = pal;
1425
1426     // VZ: can anyone explain me what do we do here?
1427     wxWindowDC d((wxWindow *) this);
1428     d.SetPalette(pal);
1429 }
1430
1431 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1432 {
1433     wxWindow *win = (wxWindow *)this;
1434     while ( win && !win->HasCustomPalette() )
1435     {
1436         win = win->GetParent();
1437     }
1438
1439     return win;
1440 }
1441
1442 #endif // wxUSE_PALETTE
1443
1444 #if wxUSE_CARET
1445 void wxWindowBase::SetCaret(wxCaret *caret)
1446 {
1447     if ( m_caret )
1448     {
1449         delete m_caret;
1450     }
1451
1452     m_caret = caret;
1453
1454     if ( m_caret )
1455     {
1456         wxASSERT_MSG( m_caret->GetWindow() == this,
1457                       wxT("caret should be created associated to this window") );
1458     }
1459 }
1460 #endif // wxUSE_CARET
1461
1462 #if wxUSE_VALIDATORS
1463 // ----------------------------------------------------------------------------
1464 // validators
1465 // ----------------------------------------------------------------------------
1466
1467 void wxWindowBase::SetValidator(const wxValidator& validator)
1468 {
1469     if ( m_windowValidator )
1470         delete m_windowValidator;
1471
1472     m_windowValidator = (wxValidator *)validator.Clone();
1473
1474     if ( m_windowValidator )
1475         m_windowValidator->SetWindow(this);
1476 }
1477 #endif // wxUSE_VALIDATORS
1478
1479 // ----------------------------------------------------------------------------
1480 // update region stuff
1481 // ----------------------------------------------------------------------------
1482
1483 wxRect wxWindowBase::GetUpdateClientRect() const
1484 {
1485     wxRegion rgnUpdate = GetUpdateRegion();
1486     rgnUpdate.Intersect(GetClientRect());
1487     wxRect rectUpdate = rgnUpdate.GetBox();
1488     wxPoint ptOrigin = GetClientAreaOrigin();
1489     rectUpdate.x -= ptOrigin.x;
1490     rectUpdate.y -= ptOrigin.y;
1491
1492     return rectUpdate;
1493 }
1494
1495 bool wxWindowBase::DoIsExposed(int x, int y) const
1496 {
1497     return m_updateRegion.Contains(x, y) != wxOutRegion;
1498 }
1499
1500 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1501 {
1502     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1503 }
1504
1505 void wxWindowBase::ClearBackground()
1506 {
1507     // wxGTK uses its own version, no need to add never used code
1508 #ifndef __WXGTK__
1509     wxClientDC dc((wxWindow *)this);
1510     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1511     dc.SetBackground(brush);
1512     dc.Clear();
1513 #endif // __WXGTK__
1514 }
1515
1516 // ----------------------------------------------------------------------------
1517 // find child window by id or name
1518 // ----------------------------------------------------------------------------
1519
1520 wxWindow *wxWindowBase::FindWindow(long id) const
1521 {
1522     if ( id == m_windowId )
1523         return (wxWindow *)this;
1524
1525     wxWindowBase *res = NULL;
1526     wxWindowList::compatibility_iterator node;
1527     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1528     {
1529         wxWindowBase *child = node->GetData();
1530         res = child->FindWindow( id );
1531     }
1532
1533     return (wxWindow *)res;
1534 }
1535
1536 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1537 {
1538     if ( name == m_windowName )
1539         return (wxWindow *)this;
1540
1541     wxWindowBase *res = NULL;
1542     wxWindowList::compatibility_iterator node;
1543     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1544     {
1545         wxWindow *child = node->GetData();
1546         res = child->FindWindow(name);
1547     }
1548
1549     return (wxWindow *)res;
1550 }
1551
1552
1553 // find any window by id or name or label: If parent is non-NULL, look through
1554 // children for a label or title matching the specified string. If NULL, look
1555 // through all top-level windows.
1556 //
1557 // to avoid duplicating code we reuse the same helper function but with
1558 // different comparators
1559
1560 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1561                                 const wxString& label, long id);
1562
1563 static
1564 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1565                            long WXUNUSED(id))
1566 {
1567     return win->GetLabel() == label;
1568 }
1569
1570 static
1571 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1572                           long WXUNUSED(id))
1573 {
1574     return win->GetName() == label;
1575 }
1576
1577 static
1578 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1579                         long id)
1580 {
1581     return win->GetId() == id;
1582 }
1583
1584 // recursive helper for the FindWindowByXXX() functions
1585 static
1586 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1587                                   const wxString& label,
1588                                   long id,
1589                                   wxFindWindowCmp cmp)
1590 {
1591     if ( parent )
1592     {
1593         // see if this is the one we're looking for
1594         if ( (*cmp)(parent, label, id) )
1595             return (wxWindow *)parent;
1596
1597         // It wasn't, so check all its children
1598         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1599               node;
1600               node = node->GetNext() )
1601         {
1602             // recursively check each child
1603             wxWindow *win = (wxWindow *)node->GetData();
1604             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1605             if (retwin)
1606                 return retwin;
1607         }
1608     }
1609
1610     // Not found
1611     return NULL;
1612 }
1613
1614 // helper for FindWindowByXXX()
1615 static
1616 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1617                              const wxString& label,
1618                              long id,
1619                              wxFindWindowCmp cmp)
1620 {
1621     if ( parent )
1622     {
1623         // just check parent and all its children
1624         return wxFindWindowRecursively(parent, label, id, cmp);
1625     }
1626
1627     // start at very top of wx's windows
1628     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1629           node;
1630           node = node->GetNext() )
1631     {
1632         // recursively check each window & its children
1633         wxWindow *win = node->GetData();
1634         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1635         if (retwin)
1636             return retwin;
1637     }
1638
1639     return NULL;
1640 }
1641
1642 /* static */
1643 wxWindow *
1644 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1645 {
1646     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1647 }
1648
1649 /* static */
1650 wxWindow *
1651 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1652 {
1653     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1654
1655     if ( !win )
1656     {
1657         // fall back to the label
1658         win = FindWindowByLabel(title, parent);
1659     }
1660
1661     return win;
1662 }
1663
1664 /* static */
1665 wxWindow *
1666 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1667 {
1668     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1669 }
1670
1671 // ----------------------------------------------------------------------------
1672 // dialog oriented functions
1673 // ----------------------------------------------------------------------------
1674
1675 void wxWindowBase::MakeModal(bool modal)
1676 {
1677     // Disable all other windows
1678     if ( IsTopLevel() )
1679     {
1680         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1681         while (node)
1682         {
1683             wxWindow *win = node->GetData();
1684             if (win != this)
1685                 win->Enable(!modal);
1686
1687             node = node->GetNext();
1688         }
1689     }
1690 }
1691
1692 bool wxWindowBase::Validate()
1693 {
1694 #if wxUSE_VALIDATORS
1695     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1696
1697     wxWindowList::compatibility_iterator node;
1698     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1699     {
1700         wxWindowBase *child = node->GetData();
1701         wxValidator *validator = child->GetValidator();
1702         if ( validator && !validator->Validate((wxWindow *)this) )
1703         {
1704             return false;
1705         }
1706
1707         if ( recurse && !child->Validate() )
1708         {
1709             return false;
1710         }
1711     }
1712 #endif // wxUSE_VALIDATORS
1713
1714     return true;
1715 }
1716
1717 bool wxWindowBase::TransferDataToWindow()
1718 {
1719 #if wxUSE_VALIDATORS
1720     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1721
1722     wxWindowList::compatibility_iterator node;
1723     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1724     {
1725         wxWindowBase *child = node->GetData();
1726         wxValidator *validator = child->GetValidator();
1727         if ( validator && !validator->TransferToWindow() )
1728         {
1729             wxLogWarning(_("Could not transfer data to window"));
1730 #if wxUSE_LOG
1731             wxLog::FlushActive();
1732 #endif // wxUSE_LOG
1733
1734             return false;
1735         }
1736
1737         if ( recurse )
1738         {
1739             if ( !child->TransferDataToWindow() )
1740             {
1741                 // warning already given
1742                 return false;
1743             }
1744         }
1745     }
1746 #endif // wxUSE_VALIDATORS
1747
1748     return true;
1749 }
1750
1751 bool wxWindowBase::TransferDataFromWindow()
1752 {
1753 #if wxUSE_VALIDATORS
1754     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1755
1756     wxWindowList::compatibility_iterator node;
1757     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1758     {
1759         wxWindow *child = node->GetData();
1760         wxValidator *validator = child->GetValidator();
1761         if ( validator && !validator->TransferFromWindow() )
1762         {
1763             // nop warning here because the application is supposed to give
1764             // one itself - we don't know here what might have gone wrongly
1765
1766             return false;
1767         }
1768
1769         if ( recurse )
1770         {
1771             if ( !child->TransferDataFromWindow() )
1772             {
1773                 // warning already given
1774                 return false;
1775             }
1776         }
1777     }
1778 #endif // wxUSE_VALIDATORS
1779
1780     return true;
1781 }
1782
1783 void wxWindowBase::InitDialog()
1784 {
1785     wxInitDialogEvent event(GetId());
1786     event.SetEventObject( this );
1787     GetEventHandler()->ProcessEvent(event);
1788 }
1789
1790 // ----------------------------------------------------------------------------
1791 // context-sensitive help support
1792 // ----------------------------------------------------------------------------
1793
1794 #if wxUSE_HELP
1795
1796 // associate this help text with this window
1797 void wxWindowBase::SetHelpText(const wxString& text)
1798 {
1799     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1800     if ( helpProvider )
1801     {
1802         helpProvider->AddHelp(this, text);
1803     }
1804 }
1805
1806 #if WXWIN_COMPATIBILITY_2_8
1807 // associate this help text with all windows with the same id as this
1808 // one
1809 void wxWindowBase::SetHelpTextForId(const wxString& text)
1810 {
1811     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1812     if ( helpProvider )
1813     {
1814         helpProvider->AddHelp(GetId(), text);
1815     }
1816 }
1817 #endif // WXWIN_COMPATIBILITY_2_8
1818
1819 // get the help string associated with this window (may be empty)
1820 // default implementation forwards calls to the help provider
1821 wxString
1822 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
1823                                  wxHelpEvent::Origin WXUNUSED(origin)) const
1824 {
1825     wxString text;
1826     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1827     if ( helpProvider )
1828     {
1829         text = helpProvider->GetHelp(this);
1830     }
1831
1832     return text;
1833 }
1834
1835 // show help for this window
1836 void wxWindowBase::OnHelp(wxHelpEvent& event)
1837 {
1838     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1839     if ( helpProvider )
1840     {
1841         wxPoint pos = event.GetPosition();
1842         const wxHelpEvent::Origin origin = event.GetOrigin();
1843         if ( origin == wxHelpEvent::Origin_Keyboard )
1844         {
1845             // if the help event was generated from keyboard it shouldn't
1846             // appear at the mouse position (which is still the only position
1847             // associated with help event) if the mouse is far away, although
1848             // we still do use the mouse position if it's over the window
1849             // because we suppose the user looks approximately at the mouse
1850             // already and so it would be more convenient than showing tooltip
1851             // at some arbitrary position which can be quite far from it
1852             const wxRect rectClient = GetClientRect();
1853             if ( !rectClient.Contains(ScreenToClient(pos)) )
1854             {
1855                 // position help slightly under and to the right of this window
1856                 pos = ClientToScreen(wxPoint(
1857                         2*GetCharWidth(),
1858                         rectClient.height + GetCharHeight()
1859                       ));
1860             }
1861         }
1862
1863         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
1864         {
1865             // skip the event.Skip() below
1866             return;
1867         }
1868     }
1869
1870     event.Skip();
1871 }
1872
1873 #endif // wxUSE_HELP
1874
1875 // ----------------------------------------------------------------------------
1876 // tooltips
1877 // ----------------------------------------------------------------------------
1878
1879 #if wxUSE_TOOLTIPS
1880
1881 wxString wxWindowBase::GetToolTipText() const
1882 {
1883     return m_tooltip ? m_tooltip->GetTip() : wxString();
1884 }
1885
1886 void wxWindowBase::SetToolTip( const wxString &tip )
1887 {
1888     // don't create the new tooltip if we already have one
1889     if ( m_tooltip )
1890     {
1891         m_tooltip->SetTip( tip );
1892     }
1893     else
1894     {
1895         SetToolTip( new wxToolTip( tip ) );
1896     }
1897
1898     // setting empty tooltip text does not remove the tooltip any more - use
1899     // SetToolTip(NULL) for this
1900 }
1901
1902 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
1903 {
1904     if ( m_tooltip != tooltip )
1905     {
1906         if ( m_tooltip )
1907             delete m_tooltip;
1908
1909         m_tooltip = tooltip;
1910     }
1911 }
1912
1913 #endif // wxUSE_TOOLTIPS
1914
1915 // ----------------------------------------------------------------------------
1916 // constraints and sizers
1917 // ----------------------------------------------------------------------------
1918
1919 #if wxUSE_CONSTRAINTS
1920
1921 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
1922 {
1923     if ( m_constraints )
1924     {
1925         UnsetConstraints(m_constraints);
1926         delete m_constraints;
1927     }
1928     m_constraints = constraints;
1929     if ( m_constraints )
1930     {
1931         // Make sure other windows know they're part of a 'meaningful relationship'
1932         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
1933             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
1934         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
1935             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
1936         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
1937             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
1938         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
1939             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
1940         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
1941             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
1942         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
1943             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
1944         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
1945             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
1946         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
1947             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
1948     }
1949 }
1950
1951 // This removes any dangling pointers to this window in other windows'
1952 // constraintsInvolvedIn lists.
1953 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
1954 {
1955     if ( c )
1956     {
1957         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1958             c->left.GetOtherWindow()->RemoveConstraintReference(this);
1959         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1960             c->top.GetOtherWindow()->RemoveConstraintReference(this);
1961         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
1962             c->right.GetOtherWindow()->RemoveConstraintReference(this);
1963         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
1964             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
1965         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
1966             c->width.GetOtherWindow()->RemoveConstraintReference(this);
1967         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
1968             c->height.GetOtherWindow()->RemoveConstraintReference(this);
1969         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
1970             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
1971         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
1972             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
1973     }
1974 }
1975
1976 // Back-pointer to other windows we're involved with, so if we delete this
1977 // window, we must delete any constraints we're involved with.
1978 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
1979 {
1980     if ( !m_constraintsInvolvedIn )
1981         m_constraintsInvolvedIn = new wxWindowList;
1982     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
1983         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
1984 }
1985
1986 // REMOVE back-pointer to other windows we're involved with.
1987 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
1988 {
1989     if ( m_constraintsInvolvedIn )
1990         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
1991 }
1992
1993 // Reset any constraints that mention this window
1994 void wxWindowBase::DeleteRelatedConstraints()
1995 {
1996     if ( m_constraintsInvolvedIn )
1997     {
1998         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
1999         while (node)
2000         {
2001             wxWindow *win = node->GetData();
2002             wxLayoutConstraints *constr = win->GetConstraints();
2003
2004             // Reset any constraints involving this window
2005             if ( constr )
2006             {
2007                 constr->left.ResetIfWin(this);
2008                 constr->top.ResetIfWin(this);
2009                 constr->right.ResetIfWin(this);
2010                 constr->bottom.ResetIfWin(this);
2011                 constr->width.ResetIfWin(this);
2012                 constr->height.ResetIfWin(this);
2013                 constr->centreX.ResetIfWin(this);
2014                 constr->centreY.ResetIfWin(this);
2015             }
2016
2017             wxWindowList::compatibility_iterator next = node->GetNext();
2018             m_constraintsInvolvedIn->Erase(node);
2019             node = next;
2020         }
2021
2022         delete m_constraintsInvolvedIn;
2023         m_constraintsInvolvedIn = NULL;
2024     }
2025 }
2026
2027 #endif // wxUSE_CONSTRAINTS
2028
2029 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2030 {
2031     if ( sizer == m_windowSizer)
2032         return;
2033
2034     if ( m_windowSizer )
2035     {
2036         m_windowSizer->SetContainingWindow(NULL);
2037
2038         if ( deleteOld )
2039             delete m_windowSizer;
2040     }
2041
2042     m_windowSizer = sizer;
2043     if ( m_windowSizer )
2044     {
2045         m_windowSizer->SetContainingWindow((wxWindow *)this);
2046     }
2047
2048     SetAutoLayout(m_windowSizer != NULL);
2049 }
2050
2051 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2052 {
2053     SetSizer( sizer, deleteOld );
2054     sizer->SetSizeHints( (wxWindow*) this );
2055 }
2056
2057
2058 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2059 {
2060     // adding a window to a sizer twice is going to result in fatal and
2061     // hard to debug problems later because when deleting the second
2062     // associated wxSizerItem we're going to dereference a dangling
2063     // pointer; so try to detect this as early as possible
2064     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2065                   wxT("Adding a window to the same sizer twice?") );
2066
2067     m_containingSizer = sizer;
2068 }
2069
2070 #if wxUSE_CONSTRAINTS
2071
2072 void wxWindowBase::SatisfyConstraints()
2073 {
2074     wxLayoutConstraints *constr = GetConstraints();
2075     bool wasOk = constr && constr->AreSatisfied();
2076
2077     ResetConstraints();   // Mark all constraints as unevaluated
2078
2079     int noChanges = 1;
2080
2081     // if we're a top level panel (i.e. our parent is frame/dialog), our
2082     // own constraints will never be satisfied any more unless we do it
2083     // here
2084     if ( wasOk )
2085     {
2086         while ( noChanges > 0 )
2087         {
2088             LayoutPhase1(&noChanges);
2089         }
2090     }
2091
2092     LayoutPhase2(&noChanges);
2093 }
2094
2095 #endif // wxUSE_CONSTRAINTS
2096
2097 bool wxWindowBase::Layout()
2098 {
2099     // If there is a sizer, use it instead of the constraints
2100     if ( GetSizer() )
2101     {
2102         int w = 0, h = 0;
2103         GetVirtualSize(&w, &h);
2104         GetSizer()->SetDimension( 0, 0, w, h );
2105     }
2106 #if wxUSE_CONSTRAINTS
2107     else
2108     {
2109         SatisfyConstraints(); // Find the right constraints values
2110         SetConstraintSizes(); // Recursively set the real window sizes
2111     }
2112 #endif
2113
2114     return true;
2115 }
2116
2117 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2118 {
2119     if ( GetAutoLayout() )
2120         Layout();
2121
2122     event.Skip();
2123 }
2124
2125 #if wxUSE_CONSTRAINTS
2126
2127 // first phase of the constraints evaluation: set our own constraints
2128 bool wxWindowBase::LayoutPhase1(int *noChanges)
2129 {
2130     wxLayoutConstraints *constr = GetConstraints();
2131
2132     return !constr || constr->SatisfyConstraints(this, noChanges);
2133 }
2134
2135 // second phase: set the constraints for our children
2136 bool wxWindowBase::LayoutPhase2(int *noChanges)
2137 {
2138     *noChanges = 0;
2139
2140     // Layout children
2141     DoPhase(1);
2142
2143     // Layout grand children
2144     DoPhase(2);
2145
2146     return true;
2147 }
2148
2149 // Do a phase of evaluating child constraints
2150 bool wxWindowBase::DoPhase(int phase)
2151 {
2152     // the list containing the children for which the constraints are already
2153     // set correctly
2154     wxWindowList succeeded;
2155
2156     // the max number of iterations we loop before concluding that we can't set
2157     // the constraints
2158     static const int maxIterations = 500;
2159
2160     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2161     {
2162         int noChanges = 0;
2163
2164         // loop over all children setting their constraints
2165         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2166               node;
2167               node = node->GetNext() )
2168         {
2169             wxWindow *child = node->GetData();
2170             if ( child->IsTopLevel() )
2171             {
2172                 // top level children are not inside our client area
2173                 continue;
2174             }
2175
2176             if ( !child->GetConstraints() || succeeded.Find(child) )
2177             {
2178                 // this one is either already ok or nothing we can do about it
2179                 continue;
2180             }
2181
2182             int tempNoChanges = 0;
2183             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2184                                       : child->LayoutPhase2(&tempNoChanges);
2185             noChanges += tempNoChanges;
2186
2187             if ( success )
2188             {
2189                 succeeded.Append(child);
2190             }
2191         }
2192
2193         if ( !noChanges )
2194         {
2195             // constraints are set
2196             break;
2197         }
2198     }
2199
2200     return true;
2201 }
2202
2203 void wxWindowBase::ResetConstraints()
2204 {
2205     wxLayoutConstraints *constr = GetConstraints();
2206     if ( constr )
2207     {
2208         constr->left.SetDone(false);
2209         constr->top.SetDone(false);
2210         constr->right.SetDone(false);
2211         constr->bottom.SetDone(false);
2212         constr->width.SetDone(false);
2213         constr->height.SetDone(false);
2214         constr->centreX.SetDone(false);
2215         constr->centreY.SetDone(false);
2216     }
2217
2218     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2219     while (node)
2220     {
2221         wxWindow *win = node->GetData();
2222         if ( !win->IsTopLevel() )
2223             win->ResetConstraints();
2224         node = node->GetNext();
2225     }
2226 }
2227
2228 // Need to distinguish between setting the 'fake' size for windows and sizers,
2229 // and setting the real values.
2230 void wxWindowBase::SetConstraintSizes(bool recurse)
2231 {
2232     wxLayoutConstraints *constr = GetConstraints();
2233     if ( constr && constr->AreSatisfied() )
2234     {
2235         int x = constr->left.GetValue();
2236         int y = constr->top.GetValue();
2237         int w = constr->width.GetValue();
2238         int h = constr->height.GetValue();
2239
2240         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2241              (constr->height.GetRelationship() != wxAsIs) )
2242         {
2243             SetSize(x, y, w, h);
2244         }
2245         else
2246         {
2247             // If we don't want to resize this window, just move it...
2248             Move(x, y);
2249         }
2250     }
2251     else if ( constr )
2252     {
2253         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2254                    GetClassInfo()->GetClassName(),
2255                    GetName().c_str());
2256     }
2257
2258     if ( recurse )
2259     {
2260         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2261         while (node)
2262         {
2263             wxWindow *win = node->GetData();
2264             if ( !win->IsTopLevel() && win->GetConstraints() )
2265                 win->SetConstraintSizes();
2266             node = node->GetNext();
2267         }
2268     }
2269 }
2270
2271 // Only set the size/position of the constraint (if any)
2272 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2273 {
2274     wxLayoutConstraints *constr = GetConstraints();
2275     if ( constr )
2276     {
2277         if ( x != wxDefaultCoord )
2278         {
2279             constr->left.SetValue(x);
2280             constr->left.SetDone(true);
2281         }
2282         if ( y != wxDefaultCoord )
2283         {
2284             constr->top.SetValue(y);
2285             constr->top.SetDone(true);
2286         }
2287         if ( w != wxDefaultCoord )
2288         {
2289             constr->width.SetValue(w);
2290             constr->width.SetDone(true);
2291         }
2292         if ( h != wxDefaultCoord )
2293         {
2294             constr->height.SetValue(h);
2295             constr->height.SetDone(true);
2296         }
2297     }
2298 }
2299
2300 void wxWindowBase::MoveConstraint(int x, int y)
2301 {
2302     wxLayoutConstraints *constr = GetConstraints();
2303     if ( constr )
2304     {
2305         if ( x != wxDefaultCoord )
2306         {
2307             constr->left.SetValue(x);
2308             constr->left.SetDone(true);
2309         }
2310         if ( y != wxDefaultCoord )
2311         {
2312             constr->top.SetValue(y);
2313             constr->top.SetDone(true);
2314         }
2315     }
2316 }
2317
2318 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2319 {
2320     wxLayoutConstraints *constr = GetConstraints();
2321     if ( constr )
2322     {
2323         *w = constr->width.GetValue();
2324         *h = constr->height.GetValue();
2325     }
2326     else
2327         GetSize(w, h);
2328 }
2329
2330 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2331 {
2332     wxLayoutConstraints *constr = GetConstraints();
2333     if ( constr )
2334     {
2335         *w = constr->width.GetValue();
2336         *h = constr->height.GetValue();
2337     }
2338     else
2339         GetClientSize(w, h);
2340 }
2341
2342 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2343 {
2344     wxLayoutConstraints *constr = GetConstraints();
2345     if ( constr )
2346     {
2347         *x = constr->left.GetValue();
2348         *y = constr->top.GetValue();
2349     }
2350     else
2351         GetPosition(x, y);
2352 }
2353
2354 #endif // wxUSE_CONSTRAINTS
2355
2356 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2357 {
2358     // don't do it for the dialogs/frames - they float independently of their
2359     // parent
2360     if ( !IsTopLevel() )
2361     {
2362         wxWindow *parent = GetParent();
2363         if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2364         {
2365             wxPoint pt(parent->GetClientAreaOrigin());
2366             x += pt.x;
2367             y += pt.y;
2368         }
2369     }
2370 }
2371
2372 // ----------------------------------------------------------------------------
2373 // Update UI processing
2374 // ----------------------------------------------------------------------------
2375
2376 void wxWindowBase::UpdateWindowUI(long flags)
2377 {
2378     wxUpdateUIEvent event(GetId());
2379     event.SetEventObject(this);
2380
2381     if ( GetEventHandler()->ProcessEvent(event) )
2382     {
2383         DoUpdateWindowUI(event);
2384     }
2385
2386     if (flags & wxUPDATE_UI_RECURSE)
2387     {
2388         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2389         while (node)
2390         {
2391             wxWindow* child = (wxWindow*) node->GetData();
2392             child->UpdateWindowUI(flags);
2393             node = node->GetNext();
2394         }
2395     }
2396 }
2397
2398 // do the window-specific processing after processing the update event
2399 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2400 {
2401     if ( event.GetSetEnabled() )
2402         Enable(event.GetEnabled());
2403
2404     if ( event.GetSetShown() )
2405         Show(event.GetShown());
2406 }
2407
2408 // ----------------------------------------------------------------------------
2409 // dialog units translations
2410 // ----------------------------------------------------------------------------
2411
2412 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
2413 {
2414     int charWidth = GetCharWidth();
2415     int charHeight = GetCharHeight();
2416     wxPoint pt2 = wxDefaultPosition;
2417     if (pt.x != wxDefaultCoord)
2418         pt2.x = (int) ((pt.x * 4) / charWidth);
2419     if (pt.y != wxDefaultCoord)
2420         pt2.y = (int) ((pt.y * 8) / charHeight);
2421
2422     return pt2;
2423 }
2424
2425 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
2426 {
2427     int charWidth = GetCharWidth();
2428     int charHeight = GetCharHeight();
2429     wxPoint pt2 = wxDefaultPosition;
2430     if (pt.x != wxDefaultCoord)
2431         pt2.x = (int) ((pt.x * charWidth) / 4);
2432     if (pt.y != wxDefaultCoord)
2433         pt2.y = (int) ((pt.y * charHeight) / 8);
2434
2435     return pt2;
2436 }
2437
2438 // ----------------------------------------------------------------------------
2439 // event handlers
2440 // ----------------------------------------------------------------------------
2441
2442 // propagate the colour change event to the subwindows
2443 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
2444 {
2445     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2446     while ( node )
2447     {
2448         // Only propagate to non-top-level windows
2449         wxWindow *win = node->GetData();
2450         if ( !win->IsTopLevel() )
2451         {
2452             wxSysColourChangedEvent event2;
2453             event.SetEventObject(win);
2454             win->GetEventHandler()->ProcessEvent(event2);
2455         }
2456
2457         node = node->GetNext();
2458     }
2459
2460     Refresh();
2461 }
2462
2463 // the default action is to populate dialog with data when it's created,
2464 // and nudge the UI into displaying itself correctly in case
2465 // we've turned the wxUpdateUIEvents frequency down low.
2466 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2467 {
2468     TransferDataToWindow();
2469
2470     // Update the UI at this point
2471     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2472 }
2473
2474 // ----------------------------------------------------------------------------
2475 // menu-related functions
2476 // ----------------------------------------------------------------------------
2477
2478 #if wxUSE_MENUS
2479
2480 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2481 {
2482     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2483
2484     wxCurrentPopupMenu = menu;
2485     const bool rc = DoPopupMenu(menu, x, y);
2486     wxCurrentPopupMenu = NULL;
2487
2488     return rc;
2489 }
2490
2491 // this is used to pass the id of the selected item from the menu event handler
2492 // to the main function itself
2493 //
2494 // it's ok to use a global here as there can be at most one popup menu shown at
2495 // any time
2496 static int gs_popupMenuSelection = wxID_NONE;
2497
2498 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2499 {
2500     // store the id in a global variable where we'll retrieve it from later
2501     gs_popupMenuSelection = event.GetId();
2502 }
2503
2504 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2505 {
2506     // nothing to do but do not skip it
2507 }
2508
2509 int
2510 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2511 {
2512     gs_popupMenuSelection = wxID_NONE;
2513
2514     Connect(wxEVT_COMMAND_MENU_SELECTED,
2515             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2516             NULL,
2517             this);
2518
2519     // it is common to construct the menu passed to this function dynamically
2520     // using some fixed range of ids which could clash with the ids used
2521     // elsewhere in the program, which could result in some menu items being
2522     // unintentionally disabled or otherwise modified by update UI handlers
2523     // elsewhere in the program code and this is difficult to avoid in the
2524     // program itself, so instead we just temporarily suspend UI updating while
2525     // this menu is shown
2526     Connect(wxEVT_UPDATE_UI,
2527             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2528             NULL,
2529             this);
2530
2531     PopupMenu(&menu, x, y);
2532
2533     Disconnect(wxEVT_UPDATE_UI,
2534                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2535                NULL,
2536                this);
2537     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2538                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2539                NULL,
2540                this);
2541
2542     return gs_popupMenuSelection;
2543 }
2544
2545 #endif // wxUSE_MENUS
2546
2547 // methods for drawing the sizers in a visible way
2548 #ifdef __WXDEBUG__
2549
2550 static void DrawSizers(wxWindowBase *win);
2551
2552 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2553 {
2554     wxClientDC dc((wxWindow *)win);
2555     dc.SetPen(*pen);
2556     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2557                        *wxTRANSPARENT_BRUSH);
2558     dc.DrawRectangle(rect.Deflate(1, 1));
2559 }
2560
2561 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2562 {
2563     const wxSizerItemList& items = sizer->GetChildren();
2564     for ( wxSizerItemList::const_iterator i = items.begin(),
2565                                         end = items.end();
2566           i != end;
2567           ++i )
2568     {
2569         wxSizerItem *item = *i;
2570         if ( item->IsSizer() )
2571         {
2572             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2573             DrawSizer(win, item->GetSizer());
2574         }
2575         else if ( item->IsSpacer() )
2576         {
2577             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2578         }
2579         else if ( item->IsWindow() )
2580         {
2581             DrawSizers(item->GetWindow());
2582         }
2583         else
2584             wxFAIL_MSG("inconsistent wxSizerItem status!");
2585     }
2586 }
2587
2588 static void DrawSizers(wxWindowBase *win)
2589 {
2590     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2591
2592     wxSizer *sizer = win->GetSizer();
2593     if ( sizer )
2594     {
2595         DrawSizer(win, sizer);
2596     }
2597     else // no sizer, still recurse into the children
2598     {
2599         const wxWindowList& children = win->GetChildren();
2600         for ( wxWindowList::const_iterator i = children.begin(),
2601                                          end = children.end();
2602               i != end;
2603               ++i )
2604         {
2605             DrawSizers(*i);
2606         }
2607
2608         // show all kind of sizes of this window; see the "window sizing" topic
2609         // overview for more info about the various differences:
2610         wxSize fullSz = win->GetSize();
2611         wxSize clientSz = win->GetClientSize();
2612         wxSize bestSz = win->GetBestSize();
2613         wxSize minSz = win->GetMinSize();
2614         wxSize maxSz = win->GetMaxSize();
2615         wxSize virtualSz = win->GetVirtualSize();
2616
2617         wxMessageOutputDebug dbgout;
2618         dbgout.Printf(
2619             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
2620             win->GetName(),
2621             fullSz.x, fullSz.y,
2622             clientSz.x, clientSz.y,
2623             bestSz.x, bestSz.y,
2624             minSz.x, minSz.y,
2625             maxSz.x, maxSz.y,
2626             virtualSz.x, virtualSz.y);
2627     }
2628 }
2629
2630 #endif // __WXDEBUG__
2631
2632 // process special middle clicks
2633 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
2634 {
2635     if ( event.ControlDown() && event.AltDown() )
2636     {
2637 #ifdef __WXDEBUG__
2638         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
2639         if ( event.ShiftDown() )
2640         {
2641             DrawSizers(this);
2642             return;
2643         }
2644 #endif // __WXDEBUG__
2645         ::wxInfoMessageBox((wxWindow*)this);
2646     }
2647     else
2648     {
2649         event.Skip();
2650     }
2651 }
2652
2653 // ----------------------------------------------------------------------------
2654 // accessibility
2655 // ----------------------------------------------------------------------------
2656
2657 #if wxUSE_ACCESSIBILITY
2658 void wxWindowBase::SetAccessible(wxAccessible* accessible)
2659 {
2660     if (m_accessible && (accessible != m_accessible))
2661         delete m_accessible;
2662     m_accessible = accessible;
2663     if (m_accessible)
2664         m_accessible->SetWindow((wxWindow*) this);
2665 }
2666
2667 // Returns the accessible object, creating if necessary.
2668 wxAccessible* wxWindowBase::GetOrCreateAccessible()
2669 {
2670     if (!m_accessible)
2671         m_accessible = CreateAccessible();
2672     return m_accessible;
2673 }
2674
2675 // Override to create a specific accessible object.
2676 wxAccessible* wxWindowBase::CreateAccessible()
2677 {
2678     return new wxWindowAccessible((wxWindow*) this);
2679 }
2680
2681 #endif
2682
2683 // ----------------------------------------------------------------------------
2684 // list classes implementation
2685 // ----------------------------------------------------------------------------
2686
2687 #if wxUSE_STL
2688
2689 #include "wx/listimpl.cpp"
2690 WX_DEFINE_LIST(wxWindowList)
2691
2692 #else // !wxUSE_STL
2693
2694 void wxWindowListNode::DeleteData()
2695 {
2696     delete (wxWindow *)GetData();
2697 }
2698
2699 #endif // wxUSE_STL/!wxUSE_STL
2700
2701 // ----------------------------------------------------------------------------
2702 // borders
2703 // ----------------------------------------------------------------------------
2704
2705 wxBorder wxWindowBase::GetBorder(long flags) const
2706 {
2707     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
2708     if ( border == wxBORDER_DEFAULT )
2709     {
2710         border = GetDefaultBorder();
2711     }
2712     else if ( border == wxBORDER_THEME )
2713     {
2714         border = GetDefaultBorderForControl();
2715     }
2716
2717     return border;
2718 }
2719
2720 wxBorder wxWindowBase::GetDefaultBorder() const
2721 {
2722     return wxBORDER_NONE;
2723 }
2724
2725 // ----------------------------------------------------------------------------
2726 // hit testing
2727 // ----------------------------------------------------------------------------
2728
2729 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
2730 {
2731     // here we just check if the point is inside the window or not
2732
2733     // check the top and left border first
2734     bool outside = x < 0 || y < 0;
2735     if ( !outside )
2736     {
2737         // check the right and bottom borders too
2738         wxSize size = GetSize();
2739         outside = x >= size.x || y >= size.y;
2740     }
2741
2742     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
2743 }
2744
2745 // ----------------------------------------------------------------------------
2746 // mouse capture
2747 // ----------------------------------------------------------------------------
2748
2749 struct WXDLLEXPORT wxWindowNext
2750 {
2751     wxWindow *win;
2752     wxWindowNext *next;
2753 } *wxWindowBase::ms_winCaptureNext = NULL;
2754 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
2755 bool wxWindowBase::ms_winCaptureChanging = false;
2756
2757 void wxWindowBase::CaptureMouse()
2758 {
2759     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
2760
2761     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
2762
2763     ms_winCaptureChanging = true;
2764
2765     wxWindow *winOld = GetCapture();
2766     if ( winOld )
2767     {
2768         ((wxWindowBase*) winOld)->DoReleaseMouse();
2769
2770         // save it on stack
2771         wxWindowNext *item = new wxWindowNext;
2772         item->win = winOld;
2773         item->next = ms_winCaptureNext;
2774         ms_winCaptureNext = item;
2775     }
2776     //else: no mouse capture to save
2777
2778     DoCaptureMouse();
2779     ms_winCaptureCurrent = (wxWindow*)this;
2780
2781     ms_winCaptureChanging = false;
2782 }
2783
2784 void wxWindowBase::ReleaseMouse()
2785 {
2786     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
2787
2788     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
2789
2790     wxASSERT_MSG( GetCapture() == this,
2791                   "attempt to release mouse, but this window hasn't captured it" );
2792     wxASSERT_MSG( ms_winCaptureCurrent == this,
2793                   "attempt to release mouse, but this window hasn't captured it" );
2794
2795     ms_winCaptureChanging = true;
2796
2797     DoReleaseMouse();
2798     ms_winCaptureCurrent = NULL;
2799
2800     if ( ms_winCaptureNext )
2801     {
2802         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
2803         ms_winCaptureCurrent = ms_winCaptureNext->win;
2804
2805         wxWindowNext *item = ms_winCaptureNext;
2806         ms_winCaptureNext = item->next;
2807         delete item;
2808     }
2809     //else: stack is empty, no previous capture
2810
2811     ms_winCaptureChanging = false;
2812
2813     wxLogTrace(wxT("mousecapture"),
2814         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
2815         static_cast<void*>(GetCapture()));
2816 }
2817
2818 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
2819 {
2820     wxMouseCaptureLostEvent event(win->GetId());
2821     event.SetEventObject(win);
2822     if ( !win->GetEventHandler()->ProcessEvent(event) )
2823     {
2824         // windows must handle this event, otherwise the app wouldn't behave
2825         // correctly if it loses capture unexpectedly; see the discussion here:
2826         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
2827         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
2828         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
2829     }
2830 }
2831
2832 /* static */
2833 void wxWindowBase::NotifyCaptureLost()
2834 {
2835     // don't do anything if capture lost was expected, i.e. resulted from
2836     // a wx call to ReleaseMouse or CaptureMouse:
2837     if ( ms_winCaptureChanging )
2838         return;
2839
2840     // if the capture was lost unexpectedly, notify every window that has
2841     // capture (on stack or current) about it and clear the stack:
2842
2843     if ( ms_winCaptureCurrent )
2844     {
2845         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
2846         ms_winCaptureCurrent = NULL;
2847     }
2848
2849     while ( ms_winCaptureNext )
2850     {
2851         wxWindowNext *item = ms_winCaptureNext;
2852         ms_winCaptureNext = item->next;
2853
2854         DoNotifyWindowAboutCaptureLost(item->win);
2855
2856         delete item;
2857     }
2858 }
2859
2860 #if wxUSE_HOTKEY
2861
2862 bool
2863 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
2864                              int WXUNUSED(modifiers),
2865                              int WXUNUSED(keycode))
2866 {
2867     // not implemented
2868     return false;
2869 }
2870
2871 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
2872 {
2873     // not implemented
2874     return false;
2875 }
2876
2877 #endif // wxUSE_HOTKEY
2878
2879 // ----------------------------------------------------------------------------
2880 // event processing
2881 // ----------------------------------------------------------------------------
2882
2883 bool wxWindowBase::TryBefore(wxEvent& event)
2884 {
2885 #if wxUSE_VALIDATORS
2886     // Can only use the validator of the window which
2887     // is receiving the event
2888     if ( event.GetEventObject() == this )
2889     {
2890         wxValidator * const validator = GetValidator();
2891         if ( validator && validator->ProcessEventHere(event) )
2892         {
2893             return true;
2894         }
2895     }
2896 #endif // wxUSE_VALIDATORS
2897
2898     return wxEvtHandler::TryBefore(event);
2899 }
2900
2901 bool wxWindowBase::TryAfter(wxEvent& event)
2902 {
2903     // carry on up the parent-child hierarchy if the propagation count hasn't
2904     // reached zero yet
2905     if ( event.ShouldPropagate() )
2906     {
2907         // honour the requests to stop propagation at this window: this is
2908         // used by the dialogs, for example, to prevent processing the events
2909         // from the dialog controls in the parent frame which rarely, if ever,
2910         // makes sense
2911         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
2912         {
2913             wxWindow *parent = GetParent();
2914             if ( parent && !parent->IsBeingDeleted() )
2915             {
2916                 wxPropagateOnce propagateOnce(event);
2917
2918                 return parent->GetEventHandler()->ProcessEvent(event);
2919             }
2920         }
2921     }
2922
2923     return wxEvtHandler::TryAfter(event);
2924 }
2925
2926 // ----------------------------------------------------------------------------
2927 // window relationships
2928 // ----------------------------------------------------------------------------
2929
2930 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
2931 {
2932     wxCHECK_MSG( GetParent(), NULL,
2933                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
2934
2935     wxWindowList& siblings = GetParent()->GetChildren();
2936     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
2937     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
2938
2939     if ( order == OrderBefore )
2940         i = i->GetPrevious();
2941     else // OrderAfter
2942         i = i->GetNext();
2943
2944     return i ? i->GetData() : NULL;
2945 }
2946
2947 // ----------------------------------------------------------------------------
2948 // keyboard navigation
2949 // ----------------------------------------------------------------------------
2950
2951 // Navigates in the specified direction inside this window
2952 bool wxWindowBase::DoNavigateIn(int flags)
2953 {
2954 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
2955     // native code doesn't process our wxNavigationKeyEvents anyhow
2956     wxUnusedVar(flags);
2957     return false;
2958 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
2959     wxNavigationKeyEvent eventNav;
2960     wxWindow *focused = FindFocus();
2961     eventNav.SetCurrentFocus(focused);
2962     eventNav.SetEventObject(focused);
2963     eventNav.SetFlags(flags);
2964     return GetEventHandler()->ProcessEvent(eventNav);
2965 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
2966 }
2967
2968 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
2969 {
2970     if ( event.GetKeyCode() != WXK_TAB )
2971         return false;
2972
2973     int flags = wxNavigationKeyEvent::FromTab;
2974
2975     if ( event.ShiftDown() )
2976         flags |= wxNavigationKeyEvent::IsBackward;
2977     else
2978         flags |= wxNavigationKeyEvent::IsForward;
2979
2980     if ( event.ControlDown() )
2981         flags |= wxNavigationKeyEvent::WinChange;
2982
2983     Navigate(flags);
2984     return true;
2985 }
2986
2987 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
2988 {
2989     // check that we're not a top level window
2990     wxCHECK_RET( GetParent(),
2991                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
2992
2993     // detect the special case when we have nothing to do anyhow and when the
2994     // code below wouldn't work
2995     if ( win == this )
2996         return;
2997
2998     // find the target window in the siblings list
2999     wxWindowList& siblings = GetParent()->GetChildren();
3000     wxWindowList::compatibility_iterator i = siblings.Find(win);
3001     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3002
3003     // unfortunately, when wxUSE_STL == 1 DetachNode() is not implemented so we
3004     // can't just move the node around
3005     wxWindow *self = (wxWindow *)this;
3006     siblings.DeleteObject(self);
3007     if ( move == OrderAfter )
3008     {
3009         i = i->GetNext();
3010     }
3011
3012     if ( i )
3013     {
3014         siblings.Insert(i, self);
3015     }
3016     else // OrderAfter and win was the last sibling
3017     {
3018         siblings.Append(self);
3019     }
3020 }
3021
3022 // ----------------------------------------------------------------------------
3023 // focus handling
3024 // ----------------------------------------------------------------------------
3025
3026 /*static*/ wxWindow* wxWindowBase::FindFocus()
3027 {
3028     wxWindowBase *win = DoFindFocus();
3029     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3030 }
3031
3032 bool wxWindowBase::HasFocus() const
3033 {
3034     wxWindowBase *win = DoFindFocus();
3035     return win == this ||
3036            win == wxConstCast(this, wxWindowBase)->GetMainWindowOfCompositeControl();
3037 }
3038
3039 // ----------------------------------------------------------------------------
3040 // drag and drop
3041 // ----------------------------------------------------------------------------
3042
3043 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3044
3045 namespace
3046 {
3047
3048 class DragAcceptFilesTarget : public wxFileDropTarget
3049 {
3050 public:
3051     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3052
3053     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3054                              const wxArrayString& filenames)
3055     {
3056         wxDropFilesEvent event(wxEVT_DROP_FILES,
3057                                filenames.size(),
3058                                wxCArrayString(filenames).Release());
3059         event.SetEventObject(m_win);
3060         event.m_pos.x = x;
3061         event.m_pos.y = y;
3062
3063         return m_win->HandleWindowEvent(event);
3064     }
3065
3066 private:
3067     wxWindowBase * const m_win;
3068
3069     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3070 };
3071
3072
3073 } // anonymous namespace
3074
3075 // Generic version of DragAcceptFiles(). It works by installing a simple
3076 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3077 // together with explicit SetDropTarget() calls.
3078 void wxWindowBase::DragAcceptFiles(bool accept)
3079 {
3080     if ( accept )
3081     {
3082         wxASSERT_MSG( !GetDropTarget(),
3083                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3084         SetDropTarget(new DragAcceptFilesTarget(this));
3085     }
3086     else
3087     {
3088         SetDropTarget(NULL);
3089     }
3090 }
3091
3092 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3093
3094 // ----------------------------------------------------------------------------
3095 // global functions
3096 // ----------------------------------------------------------------------------
3097
3098 wxWindow* wxGetTopLevelParent(wxWindow *win)
3099 {
3100     while ( win && !win->IsTopLevel() )
3101          win = win->GetParent();
3102
3103     return win;
3104 }
3105
3106 #if wxUSE_ACCESSIBILITY
3107 // ----------------------------------------------------------------------------
3108 // accessible object for windows
3109 // ----------------------------------------------------------------------------
3110
3111 // Can return either a child object, or an integer
3112 // representing the child element, starting from 1.
3113 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3114 {
3115     wxASSERT( GetWindow() != NULL );
3116     if (!GetWindow())
3117         return wxACC_FAIL;
3118
3119     return wxACC_NOT_IMPLEMENTED;
3120 }
3121
3122 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3123 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3124 {
3125     wxASSERT( GetWindow() != NULL );
3126     if (!GetWindow())
3127         return wxACC_FAIL;
3128
3129     wxWindow* win = NULL;
3130     if (elementId == 0)
3131     {
3132         win = GetWindow();
3133     }
3134     else
3135     {
3136         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3137         {
3138             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3139         }
3140         else
3141             return wxACC_FAIL;
3142     }
3143     if (win)
3144     {
3145         rect = win->GetRect();
3146         if (win->GetParent() && !win->IsKindOf(CLASSINFO(wxTopLevelWindow)))
3147             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3148         return wxACC_OK;
3149     }
3150
3151     return wxACC_NOT_IMPLEMENTED;
3152 }
3153
3154 // Navigates from fromId to toId/toObject.
3155 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3156                              int* WXUNUSED(toId), wxAccessible** toObject)
3157 {
3158     wxASSERT( GetWindow() != NULL );
3159     if (!GetWindow())
3160         return wxACC_FAIL;
3161
3162     switch (navDir)
3163     {
3164     case wxNAVDIR_FIRSTCHILD:
3165         {
3166             if (GetWindow()->GetChildren().GetCount() == 0)
3167                 return wxACC_FALSE;
3168             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3169             *toObject = childWindow->GetOrCreateAccessible();
3170
3171             return wxACC_OK;
3172         }
3173     case wxNAVDIR_LASTCHILD:
3174         {
3175             if (GetWindow()->GetChildren().GetCount() == 0)
3176                 return wxACC_FALSE;
3177             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3178             *toObject = childWindow->GetOrCreateAccessible();
3179
3180             return wxACC_OK;
3181         }
3182     case wxNAVDIR_RIGHT:
3183     case wxNAVDIR_DOWN:
3184     case wxNAVDIR_NEXT:
3185         {
3186             wxWindowList::compatibility_iterator node =
3187                 wxWindowList::compatibility_iterator();
3188             if (fromId == 0)
3189             {
3190                 // Can't navigate to sibling of this window
3191                 // if we're a top-level window.
3192                 if (!GetWindow()->GetParent())
3193                     return wxACC_NOT_IMPLEMENTED;
3194
3195                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3196             }
3197             else
3198             {
3199                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3200                     node = GetWindow()->GetChildren().Item(fromId-1);
3201             }
3202
3203             if (node && node->GetNext())
3204             {
3205                 wxWindow* nextWindow = node->GetNext()->GetData();
3206                 *toObject = nextWindow->GetOrCreateAccessible();
3207                 return wxACC_OK;
3208             }
3209             else
3210                 return wxACC_FALSE;
3211         }
3212     case wxNAVDIR_LEFT:
3213     case wxNAVDIR_UP:
3214     case wxNAVDIR_PREVIOUS:
3215         {
3216             wxWindowList::compatibility_iterator node =
3217                 wxWindowList::compatibility_iterator();
3218             if (fromId == 0)
3219             {
3220                 // Can't navigate to sibling of this window
3221                 // if we're a top-level window.
3222                 if (!GetWindow()->GetParent())
3223                     return wxACC_NOT_IMPLEMENTED;
3224
3225                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3226             }
3227             else
3228             {
3229                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3230                     node = GetWindow()->GetChildren().Item(fromId-1);
3231             }
3232
3233             if (node && node->GetPrevious())
3234             {
3235                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3236                 *toObject = previousWindow->GetOrCreateAccessible();
3237                 return wxACC_OK;
3238             }
3239             else
3240                 return wxACC_FALSE;
3241         }
3242     }
3243
3244     return wxACC_NOT_IMPLEMENTED;
3245 }
3246
3247 // Gets the name of the specified object.
3248 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3249 {
3250     wxASSERT( GetWindow() != NULL );
3251     if (!GetWindow())
3252         return wxACC_FAIL;
3253
3254     wxString title;
3255
3256     // If a child, leave wxWidgets to call the function on the actual
3257     // child object.
3258     if (childId > 0)
3259         return wxACC_NOT_IMPLEMENTED;
3260
3261     // This will eventually be replaced by specialised
3262     // accessible classes, one for each kind of wxWidgets
3263     // control or window.
3264 #if wxUSE_BUTTON
3265     if (GetWindow()->IsKindOf(CLASSINFO(wxButton)))
3266         title = ((wxButton*) GetWindow())->GetLabel();
3267     else
3268 #endif
3269         title = GetWindow()->GetName();
3270
3271     if (!title.empty())
3272     {
3273         *name = title;
3274         return wxACC_OK;
3275     }
3276     else
3277         return wxACC_NOT_IMPLEMENTED;
3278 }
3279
3280 // Gets the number of children.
3281 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3282 {
3283     wxASSERT( GetWindow() != NULL );
3284     if (!GetWindow())
3285         return wxACC_FAIL;
3286
3287     *childId = (int) GetWindow()->GetChildren().GetCount();
3288     return wxACC_OK;
3289 }
3290
3291 // Gets the specified child (starting from 1).
3292 // If *child is NULL and return value is wxACC_OK,
3293 // this means that the child is a simple element and
3294 // not an accessible object.
3295 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3296 {
3297     wxASSERT( GetWindow() != NULL );
3298     if (!GetWindow())
3299         return wxACC_FAIL;
3300
3301     if (childId == 0)
3302     {
3303         *child = this;
3304         return wxACC_OK;
3305     }
3306
3307     if (childId > (int) GetWindow()->GetChildren().GetCount())
3308         return wxACC_FAIL;
3309
3310     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3311     *child = childWindow->GetOrCreateAccessible();
3312     if (*child)
3313         return wxACC_OK;
3314     else
3315         return wxACC_FAIL;
3316 }
3317
3318 // Gets the parent, or NULL.
3319 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3320 {
3321     wxASSERT( GetWindow() != NULL );
3322     if (!GetWindow())
3323         return wxACC_FAIL;
3324
3325     wxWindow* parentWindow = GetWindow()->GetParent();
3326     if (!parentWindow)
3327     {
3328         *parent = NULL;
3329         return wxACC_OK;
3330     }
3331     else
3332     {
3333         *parent = parentWindow->GetOrCreateAccessible();
3334         if (*parent)
3335             return wxACC_OK;
3336         else
3337             return wxACC_FAIL;
3338     }
3339 }
3340
3341 // Performs the default action. childId is 0 (the action for this object)
3342 // or > 0 (the action for a child).
3343 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3344 // window (e.g. an edit control).
3345 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3346 {
3347     wxASSERT( GetWindow() != NULL );
3348     if (!GetWindow())
3349         return wxACC_FAIL;
3350
3351     return wxACC_NOT_IMPLEMENTED;
3352 }
3353
3354 // Gets the default action for this object (0) or > 0 (the action for a child).
3355 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3356 // string if there is no action.
3357 // The retrieved string describes the action that is performed on an object,
3358 // not what the object does as a result. For example, a toolbar button that prints
3359 // a document has a default action of "Press" rather than "Prints the current document."
3360 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3361 {
3362     wxASSERT( GetWindow() != NULL );
3363     if (!GetWindow())
3364         return wxACC_FAIL;
3365
3366     return wxACC_NOT_IMPLEMENTED;
3367 }
3368
3369 // Returns the description for this object or a child.
3370 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3371 {
3372     wxASSERT( GetWindow() != NULL );
3373     if (!GetWindow())
3374         return wxACC_FAIL;
3375
3376     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3377     if (!ht.empty())
3378     {
3379         *description = ht;
3380         return wxACC_OK;
3381     }
3382     return wxACC_NOT_IMPLEMENTED;
3383 }
3384
3385 // Returns help text for this object or a child, similar to tooltip text.
3386 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3387 {
3388     wxASSERT( GetWindow() != NULL );
3389     if (!GetWindow())
3390         return wxACC_FAIL;
3391
3392     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3393     if (!ht.empty())
3394     {
3395         *helpText = ht;
3396         return wxACC_OK;
3397     }
3398     return wxACC_NOT_IMPLEMENTED;
3399 }
3400
3401 // Returns the keyboard shortcut for this object or child.
3402 // Return e.g. ALT+K
3403 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3404 {
3405     wxASSERT( GetWindow() != NULL );
3406     if (!GetWindow())
3407         return wxACC_FAIL;
3408
3409     return wxACC_NOT_IMPLEMENTED;
3410 }
3411
3412 // Returns a role constant.
3413 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3414 {
3415     wxASSERT( GetWindow() != NULL );
3416     if (!GetWindow())
3417         return wxACC_FAIL;
3418
3419     // If a child, leave wxWidgets to call the function on the actual
3420     // child object.
3421     if (childId > 0)
3422         return wxACC_NOT_IMPLEMENTED;
3423
3424     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3425         return wxACC_NOT_IMPLEMENTED;
3426 #if wxUSE_STATUSBAR
3427     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3428         return wxACC_NOT_IMPLEMENTED;
3429 #endif
3430 #if wxUSE_TOOLBAR
3431     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3432         return wxACC_NOT_IMPLEMENTED;
3433 #endif
3434
3435     //*role = wxROLE_SYSTEM_CLIENT;
3436     *role = wxROLE_SYSTEM_CLIENT;
3437     return wxACC_OK;
3438
3439     #if 0
3440     return wxACC_NOT_IMPLEMENTED;
3441     #endif
3442 }
3443
3444 // Returns a state constant.
3445 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3446 {
3447     wxASSERT( GetWindow() != NULL );
3448     if (!GetWindow())
3449         return wxACC_FAIL;
3450
3451     // If a child, leave wxWidgets to call the function on the actual
3452     // child object.
3453     if (childId > 0)
3454         return wxACC_NOT_IMPLEMENTED;
3455
3456     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3457         return wxACC_NOT_IMPLEMENTED;
3458
3459 #if wxUSE_STATUSBAR
3460     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3461         return wxACC_NOT_IMPLEMENTED;
3462 #endif
3463 #if wxUSE_TOOLBAR
3464     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3465         return wxACC_NOT_IMPLEMENTED;
3466 #endif
3467
3468     *state = 0;
3469     return wxACC_OK;
3470
3471     #if 0
3472     return wxACC_NOT_IMPLEMENTED;
3473     #endif
3474 }
3475
3476 // Returns a localized string representing the value for the object
3477 // or child.
3478 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3479 {
3480     wxASSERT( GetWindow() != NULL );
3481     if (!GetWindow())
3482         return wxACC_FAIL;
3483
3484     return wxACC_NOT_IMPLEMENTED;
3485 }
3486
3487 // Selects the object or child.
3488 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3489 {
3490     wxASSERT( GetWindow() != NULL );
3491     if (!GetWindow())
3492         return wxACC_FAIL;
3493
3494     return wxACC_NOT_IMPLEMENTED;
3495 }
3496
3497 // Gets the window with the keyboard focus.
3498 // If childId is 0 and child is NULL, no object in
3499 // this subhierarchy has the focus.
3500 // If this object has the focus, child should be 'this'.
3501 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3502 {
3503     wxASSERT( GetWindow() != NULL );
3504     if (!GetWindow())
3505         return wxACC_FAIL;
3506
3507     return wxACC_NOT_IMPLEMENTED;
3508 }
3509
3510 #if wxUSE_VARIANT
3511 // Gets a variant representing the selected children
3512 // of this object.
3513 // Acceptable values:
3514 // - a null variant (IsNull() returns true)
3515 // - a list variant (GetType() == wxT("list")
3516 // - an integer representing the selected child element,
3517 //   or 0 if this object is selected (GetType() == wxT("long")
3518 // - a "void*" pointer to a wxAccessible child object
3519 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3520 {
3521     wxASSERT( GetWindow() != NULL );
3522     if (!GetWindow())
3523         return wxACC_FAIL;
3524
3525     return wxACC_NOT_IMPLEMENTED;
3526 }
3527 #endif // wxUSE_VARIANT
3528
3529 #endif // wxUSE_ACCESSIBILITY
3530
3531 // ----------------------------------------------------------------------------
3532 // RTL support
3533 // ----------------------------------------------------------------------------
3534
3535 wxCoord
3536 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3537                                        wxCoord width,
3538                                        wxCoord widthTotal) const
3539 {
3540     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3541     {
3542         x = widthTotal - x - width;
3543     }
3544
3545     return x;
3546 }
3547
3548