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 bool wxWindowBase::HasScrollbar(int orient) const
 900 {
 901     // if scrolling in the given direction is disabled, we can't have the
 902     // corresponding scrollbar no matter what
 903     if ( !CanScroll(orient) )
 904         return false;
 905
 906     const wxSize sizeVirt = GetVirtualSize();
 907     const wxSize sizeClient = GetClientSize();
 908
 909     return orient == wxHORIZONTAL ? sizeVirt.x > sizeClient.x
 910                                   : sizeVirt.y > sizeClient.y;
 911 }
 912
 913 // ----------------------------------------------------------------------------
 914 // show/hide/enable/disable the window
 915 // ----------------------------------------------------------------------------
 916
 917 bool wxWindowBase::Show(bool show)
 918 {
 919     if ( show != m_isShown )
 920     {
 921         m_isShown = show;
 922
 923         return true;
 924     }
 925     else
 926     {
 927         return false;
 928     }
 929 }
 930
 931 bool wxWindowBase::IsEnabled() const
 932 {
 933     return IsThisEnabled() && (IsTopLevel() || !GetParent() || GetParent()->IsEnabled());
 934 }
 935
 936 void wxWindowBase::NotifyWindowOnEnableChange(bool enabled)
 937 {
 938 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
 939     DoEnable(enabled);
 940 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 941
 942     OnEnabled(enabled);
 943
 944     // If we are top-level then the logic doesn't apply - otherwise
 945     // showing a modal dialog would result in total greying out (and ungreying
 946     // out later) of everything which would be really ugly
 947     if ( IsTopLevel() )
 948         return;
 949
 950     for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 951           node;
 952           node = node->GetNext() )
 953     {
 954         wxWindowBase * const child = node->GetData();
 955         if ( !child->IsTopLevel() && child->IsThisEnabled() )
 956             child->NotifyWindowOnEnableChange(enabled);
 957     }
 958 }
 959
 960 bool wxWindowBase::Enable(bool enable)
 961 {
 962     if ( enable == IsThisEnabled() )
 963         return false;
 964
 965     m_isEnabled = enable;
 966
 967 #ifdef wxHAS_NATIVE_ENABLED_MANAGEMENT
 968     DoEnable(enable);
 969 #else // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 970     wxWindowBase * const parent = GetParent();
 971     if( !IsTopLevel() && parent && !parent->IsEnabled() )
 972     {
 973         return true;
 974     }
 975 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 976
 977     NotifyWindowOnEnableChange(enable);
 978
 979     return true;
 980 }
 981
 982 bool wxWindowBase::IsShownOnScreen() const
 983 {
 984     // A window is shown on screen if it itself is shown and so are all its
 985     // parents. But if a window is toplevel one, then its always visible on
 986     // screen if IsShown() returns true, even if it has a hidden parent.
 987     return IsShown() &&
 988            (IsTopLevel() || GetParent() == NULL || GetParent()->IsShownOnScreen());
 989 }
 990
 991 // ----------------------------------------------------------------------------
 992 // RTTI
 993 // ----------------------------------------------------------------------------
 994
 995 bool wxWindowBase::IsTopLevel() const
 996 {
 997     return false;
 998 }
 999
1000 // ----------------------------------------------------------------------------
1001 // Freeze/Thaw
1002 // ----------------------------------------------------------------------------
1003
1004 void wxWindowBase::Freeze()
1005 {
1006     if ( !m_freezeCount++ )
1007     {
1008         // physically freeze this window:
1009         DoFreeze();
1010
1011         // and recursively freeze all children:
1012         for ( wxWindowList::iterator i = GetChildren().begin();
1013               i != GetChildren().end(); ++i )
1014         {
1015             wxWindow *child = *i;
1016             if ( child->IsTopLevel() )
1017                 continue;
1018
1019             child->Freeze();
1020         }
1021     }
1022 }
1023
1024 void wxWindowBase::Thaw()
1025 {
1026     wxASSERT_MSG( m_freezeCount, "Thaw() without matching Freeze()" );
1027
1028     if ( !--m_freezeCount )
1029     {
1030         // recursively thaw all children:
1031         for ( wxWindowList::iterator i = GetChildren().begin();
1032               i != GetChildren().end(); ++i )
1033         {
1034             wxWindow *child = *i;
1035             if ( child->IsTopLevel() )
1036                 continue;
1037
1038             child->Thaw();
1039         }
1040
1041         // physically thaw this window:
1042         DoThaw();
1043     }
1044 }
1045
1046 // ----------------------------------------------------------------------------
1047 // reparenting the window
1048 // ----------------------------------------------------------------------------
1049
1050 void wxWindowBase::AddChild(wxWindowBase *child)
1051 {
1052     wxCHECK_RET( child, wxT("can't add a NULL child") );
1053
1054     // this should never happen and it will lead to a crash later if it does
1055     // because RemoveChild() will remove only one node from the children list
1056     // and the other(s) one(s) will be left with dangling pointers in them
1057     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), wxT("AddChild() called twice") );
1058
1059     GetChildren().Append((wxWindow*)child);
1060     child->SetParent(this);
1061
1062     // adding a child while frozen will assert when thawed, so freeze it as if
1063     // it had been already present when we were frozen
1064     if ( IsFrozen() && !child->IsTopLevel() )
1065         child->Freeze();
1066 }
1067
1068 void wxWindowBase::RemoveChild(wxWindowBase *child)
1069 {
1070     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1071
1072     // removing a child while frozen may result in permanently frozen window
1073     // if used e.g. from Reparent(), so thaw it
1074     //
1075     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1076     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1077     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1078         child->Thaw();
1079
1080     GetChildren().DeleteObject((wxWindow *)child);
1081     child->SetParent(NULL);
1082 }
1083
1084 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1085 {
1086     wxWindow *oldParent = GetParent();
1087     if ( newParent == oldParent )
1088     {
1089         // nothing done
1090         return false;
1091     }
1092
1093     const bool oldEnabledState = IsEnabled();
1094
1095     // unlink this window from the existing parent.
1096     if ( oldParent )
1097     {
1098         oldParent->RemoveChild(this);
1099     }
1100     else
1101     {
1102         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1103     }
1104
1105     // add it to the new one
1106     if ( newParent )
1107     {
1108         newParent->AddChild(this);
1109     }
1110     else
1111     {
1112         wxTopLevelWindows.Append((wxWindow *)this);
1113     }
1114
1115     // We need to notify window (and its subwindows) if by changing the parent
1116     // we also change our enabled/disabled status.
1117     const bool newEnabledState = IsEnabled();
1118     if ( newEnabledState != oldEnabledState )
1119     {
1120         NotifyWindowOnEnableChange(newEnabledState);
1121     }
1122
1123     return true;
1124 }
1125
1126 // ----------------------------------------------------------------------------
1127 // event handler stuff
1128 // ----------------------------------------------------------------------------
1129
1130 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1131 {
1132     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1133
1134     m_eventHandler = handler;
1135 }
1136
1137 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1138 {
1139     // disable wxEvtHandler chain mechanism for wxWindows:
1140     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1141
1142     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1143 }
1144 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1145 {
1146     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1147     // handler of our stack when is destroyed will be Unlink()ed and thus
1148     // will call this function to update the pointer of this window...
1149
1150     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1151 }
1152
1153 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1154 {
1155     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1156
1157     // the new handler is going to be part of the wxWindow stack of event handlers:
1158     // it can't be part also of an event handler double-linked chain:
1159     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1160         "The handler being pushed in the wxWindow stack shouldn't be part of "
1161         "a wxEvtHandler chain; call Unlink() on it first");
1162
1163     wxEvtHandler *handlerOld = GetEventHandler();
1164     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1165
1166     // now use wxEvtHandler double-linked list to implement a stack:
1167     handlerToPush->SetNextHandler(handlerOld);
1168
1169     if (handlerOld != this)
1170         handlerOld->SetPreviousHandler(handlerToPush);
1171
1172     SetEventHandler(handlerToPush);
1173
1174 #if wxDEBUG_LEVEL
1175     // final checks of the operations done above:
1176     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1177         "the first handler of the wxWindow stack should "
1178         "have no previous handlers set" );
1179     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1180         "the first handler of the wxWindow stack should "
1181         "have non-NULL next handler" );
1182
1183     wxEvtHandler* pLast = handlerToPush;
1184     while ( pLast && pLast != this )
1185         pLast = pLast->GetNextHandler();
1186     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1187         "the last handler of the wxWindow stack should "
1188         "have this window as next handler" );
1189 #endif // wxDEBUG_LEVEL
1190 }
1191
1192 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1193 {
1194     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1195
1196     wxEvtHandler *firstHandler = GetEventHandler();
1197     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1198     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1199     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1200         "the first handler of the wxWindow stack should have no previous handlers set" );
1201
1202     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1203     wxCHECK_MSG( secondHandler != NULL, NULL,
1204         "the first handler of the wxWindow stack should have non-NULL next handler" );
1205
1206     firstHandler->SetNextHandler(NULL);
1207     secondHandler->SetPreviousHandler(NULL);
1208
1209     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1210     SetEventHandler(secondHandler);
1211
1212     if ( deleteHandler )
1213     {
1214         delete firstHandler;
1215         firstHandler = NULL;
1216     }
1217
1218     return firstHandler;
1219 }
1220
1221 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1222 {
1223     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1224     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1225
1226     if (handlerToRemove == GetEventHandler())
1227     {
1228         // removing the first event handler is equivalent to "popping" the stack
1229         PopEventHandler(false);
1230         return true;
1231     }
1232
1233     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1234     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1235     while ( handlerCur != this )
1236     {
1237         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1238
1239         if ( handlerCur == handlerToRemove )
1240         {
1241             handlerCur->Unlink();
1242
1243             wxASSERT_MSG( handlerCur != GetEventHandler(),
1244                         "the case Remove == Pop should was already handled" );
1245             return true;
1246         }
1247
1248         handlerCur = handlerNext;
1249     }
1250
1251     wxFAIL_MSG( wxT("where has the event handler gone?") );
1252
1253     return false;
1254 }
1255
1256 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1257 {
1258     // SafelyProcessEvent() will handle exceptions nicely
1259     return GetEventHandler()->SafelyProcessEvent(event);
1260 }
1261
1262 // ----------------------------------------------------------------------------
1263 // colours, fonts &c
1264 // ----------------------------------------------------------------------------
1265
1266 void wxWindowBase::InheritAttributes()
1267 {
1268     const wxWindowBase * const parent = GetParent();
1269     if ( !parent )
1270         return;
1271
1272     // we only inherit attributes which had been explicitly set for the parent
1273     // which ensures that this only happens if the user really wants it and
1274     // not by default which wouldn't make any sense in modern GUIs where the
1275     // controls don't all use the same fonts (nor colours)
1276     if ( parent->m_inheritFont && !m_hasFont )
1277         SetFont(parent->GetFont());
1278
1279     // in addition, there is a possibility to explicitly forbid inheriting
1280     // colours at each class level by overriding ShouldInheritColours()
1281     if ( ShouldInheritColours() )
1282     {
1283         if ( parent->m_inheritFgCol && !m_hasFgCol )
1284             SetForegroundColour(parent->GetForegroundColour());
1285
1286         // inheriting (solid) background colour is wrong as it totally breaks
1287         // any kind of themed backgrounds
1288         //
1289         // instead, the controls should use the same background as their parent
1290         // (ideally by not drawing it at all)
1291 #if 0
1292         if ( parent->m_inheritBgCol && !m_hasBgCol )
1293             SetBackgroundColour(parent->GetBackgroundColour());
1294 #endif // 0
1295     }
1296 }
1297
1298 /* static */ wxVisualAttributes
1299 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1300 {
1301     // it is important to return valid values for all attributes from here,
1302     // GetXXX() below rely on this
1303     wxVisualAttributes attrs;
1304     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1305     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1306
1307     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1308     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1309     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1310     // colour on other platforms.
1311
1312 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1313     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1314 #else
1315     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1316 #endif
1317     return attrs;
1318 }
1319
1320 wxColour wxWindowBase::GetBackgroundColour() const
1321 {
1322     if ( !m_backgroundColour.IsOk() )
1323     {
1324         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1325
1326         // get our default background colour
1327         wxColour colBg = GetDefaultAttributes().colBg;
1328
1329         // we must return some valid colour to avoid redoing this every time
1330         // and also to avoid surprizing the applications written for older
1331         // wxWidgets versions where GetBackgroundColour() always returned
1332         // something -- so give them something even if it doesn't make sense
1333         // for this window (e.g. it has a themed background)
1334         if ( !colBg.Ok() )
1335             colBg = GetClassDefaultAttributes().colBg;
1336
1337         return colBg;
1338     }
1339     else
1340         return m_backgroundColour;
1341 }
1342
1343 wxColour wxWindowBase::GetForegroundColour() const
1344 {
1345     // logic is the same as above
1346     if ( !m_hasFgCol && !m_foregroundColour.Ok() )
1347     {
1348         wxColour colFg = GetDefaultAttributes().colFg;
1349
1350         if ( !colFg.IsOk() )
1351             colFg = GetClassDefaultAttributes().colFg;
1352
1353         return colFg;
1354     }
1355     else
1356         return m_foregroundColour;
1357 }
1358
1359 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1360 {
1361     if ( colour == m_backgroundColour )
1362         return false;
1363
1364     m_hasBgCol = colour.IsOk();
1365
1366     m_inheritBgCol = m_hasBgCol;
1367     m_backgroundColour = colour;
1368     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.Ok() );
1369     return true;
1370 }
1371
1372 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1373 {
1374     if (colour == m_foregroundColour )
1375         return false;
1376
1377     m_hasFgCol = colour.IsOk();
1378     m_inheritFgCol = m_hasFgCol;
1379     m_foregroundColour = colour;
1380     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.Ok() );
1381     return true;
1382 }
1383
1384 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1385 {
1386     // setting an invalid cursor is ok, it means that we don't have any special
1387     // cursor
1388     if ( m_cursor.IsSameAs(cursor) )
1389     {
1390         // no change
1391         return false;
1392     }
1393
1394     m_cursor = cursor;
1395
1396     return true;
1397 }
1398
1399 wxFont wxWindowBase::GetFont() const
1400 {
1401     // logic is the same as in GetBackgroundColour()
1402     if ( !m_font.IsOk() )
1403     {
1404         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1405
1406         wxFont font = GetDefaultAttributes().font;
1407         if ( !font.IsOk() )
1408             font = GetClassDefaultAttributes().font;
1409
1410         return font;
1411     }
1412     else
1413         return m_font;
1414 }
1415
1416 bool wxWindowBase::SetFont(const wxFont& font)
1417 {
1418     if ( font == m_font )
1419     {
1420         // no change
1421         return false;
1422     }
1423
1424     m_font = font;
1425     m_hasFont = font.IsOk();
1426     m_inheritFont = m_hasFont;
1427
1428     InvalidateBestSize();
1429
1430     return true;
1431 }
1432
1433 #if wxUSE_PALETTE
1434
1435 void wxWindowBase::SetPalette(const wxPalette& pal)
1436 {
1437     m_hasCustomPalette = true;
1438     m_palette = pal;
1439
1440     // VZ: can anyone explain me what do we do here?
1441     wxWindowDC d((wxWindow *) this);
1442     d.SetPalette(pal);
1443 }
1444
1445 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1446 {
1447     wxWindow *win = (wxWindow *)this;
1448     while ( win && !win->HasCustomPalette() )
1449     {
1450         win = win->GetParent();
1451     }
1452
1453     return win;
1454 }
1455
1456 #endif // wxUSE_PALETTE
1457
1458 #if wxUSE_CARET
1459 void wxWindowBase::SetCaret(wxCaret *caret)
1460 {
1461     if ( m_caret )
1462     {
1463         delete m_caret;
1464     }
1465
1466     m_caret = caret;
1467
1468     if ( m_caret )
1469     {
1470         wxASSERT_MSG( m_caret->GetWindow() == this,
1471                       wxT("caret should be created associated to this window") );
1472     }
1473 }
1474 #endif // wxUSE_CARET
1475
1476 #if wxUSE_VALIDATORS
1477 // ----------------------------------------------------------------------------
1478 // validators
1479 // ----------------------------------------------------------------------------
1480
1481 void wxWindowBase::SetValidator(const wxValidator& validator)
1482 {
1483     if ( m_windowValidator )
1484         delete m_windowValidator;
1485
1486     m_windowValidator = (wxValidator *)validator.Clone();
1487
1488     if ( m_windowValidator )
1489         m_windowValidator->SetWindow(this);
1490 }
1491 #endif // wxUSE_VALIDATORS
1492
1493 // ----------------------------------------------------------------------------
1494 // update region stuff
1495 // ----------------------------------------------------------------------------
1496
1497 wxRect wxWindowBase::GetUpdateClientRect() const
1498 {
1499     wxRegion rgnUpdate = GetUpdateRegion();
1500     rgnUpdate.Intersect(GetClientRect());
1501     wxRect rectUpdate = rgnUpdate.GetBox();
1502     wxPoint ptOrigin = GetClientAreaOrigin();
1503     rectUpdate.x -= ptOrigin.x;
1504     rectUpdate.y -= ptOrigin.y;
1505
1506     return rectUpdate;
1507 }
1508
1509 bool wxWindowBase::DoIsExposed(int x, int y) const
1510 {
1511     return m_updateRegion.Contains(x, y) != wxOutRegion;
1512 }
1513
1514 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1515 {
1516     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1517 }
1518
1519 void wxWindowBase::ClearBackground()
1520 {
1521     // wxGTK uses its own version, no need to add never used code
1522 #ifndef __WXGTK__
1523     wxClientDC dc((wxWindow *)this);
1524     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1525     dc.SetBackground(brush);
1526     dc.Clear();
1527 #endif // __WXGTK__
1528 }
1529
1530 // ----------------------------------------------------------------------------
1531 // find child window by id or name
1532 // ----------------------------------------------------------------------------
1533
1534 wxWindow *wxWindowBase::FindWindow(long id) const
1535 {
1536     if ( id == m_windowId )
1537         return (wxWindow *)this;
1538
1539     wxWindowBase *res = NULL;
1540     wxWindowList::compatibility_iterator node;
1541     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1542     {
1543         wxWindowBase *child = node->GetData();
1544         res = child->FindWindow( id );
1545     }
1546
1547     return (wxWindow *)res;
1548 }
1549
1550 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1551 {
1552     if ( name == m_windowName )
1553         return (wxWindow *)this;
1554
1555     wxWindowBase *res = NULL;
1556     wxWindowList::compatibility_iterator node;
1557     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1558     {
1559         wxWindow *child = node->GetData();
1560         res = child->FindWindow(name);
1561     }
1562
1563     return (wxWindow *)res;
1564 }
1565
1566
1567 // find any window by id or name or label: If parent is non-NULL, look through
1568 // children for a label or title matching the specified string. If NULL, look
1569 // through all top-level windows.
1570 //
1571 // to avoid duplicating code we reuse the same helper function but with
1572 // different comparators
1573
1574 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1575                                 const wxString& label, long id);
1576
1577 static
1578 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1579                            long WXUNUSED(id))
1580 {
1581     return win->GetLabel() == label;
1582 }
1583
1584 static
1585 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1586                           long WXUNUSED(id))
1587 {
1588     return win->GetName() == label;
1589 }
1590
1591 static
1592 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1593                         long id)
1594 {
1595     return win->GetId() == id;
1596 }
1597
1598 // recursive helper for the FindWindowByXXX() functions
1599 static
1600 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1601                                   const wxString& label,
1602                                   long id,
1603                                   wxFindWindowCmp cmp)
1604 {
1605     if ( parent )
1606     {
1607         // see if this is the one we're looking for
1608         if ( (*cmp)(parent, label, id) )
1609             return (wxWindow *)parent;
1610
1611         // It wasn't, so check all its children
1612         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1613               node;
1614               node = node->GetNext() )
1615         {
1616             // recursively check each child
1617             wxWindow *win = (wxWindow *)node->GetData();
1618             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1619             if (retwin)
1620                 return retwin;
1621         }
1622     }
1623
1624     // Not found
1625     return NULL;
1626 }
1627
1628 // helper for FindWindowByXXX()
1629 static
1630 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1631                              const wxString& label,
1632                              long id,
1633                              wxFindWindowCmp cmp)
1634 {
1635     if ( parent )
1636     {
1637         // just check parent and all its children
1638         return wxFindWindowRecursively(parent, label, id, cmp);
1639     }
1640
1641     // start at very top of wx's windows
1642     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1643           node;
1644           node = node->GetNext() )
1645     {
1646         // recursively check each window & its children
1647         wxWindow *win = node->GetData();
1648         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1649         if (retwin)
1650             return retwin;
1651     }
1652
1653     return NULL;
1654 }
1655
1656 /* static */
1657 wxWindow *
1658 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1659 {
1660     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1661 }
1662
1663 /* static */
1664 wxWindow *
1665 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1666 {
1667     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1668
1669     if ( !win )
1670     {
1671         // fall back to the label
1672         win = FindWindowByLabel(title, parent);
1673     }
1674
1675     return win;
1676 }
1677
1678 /* static */
1679 wxWindow *
1680 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1681 {
1682     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1683 }
1684
1685 // ----------------------------------------------------------------------------
1686 // dialog oriented functions
1687 // ----------------------------------------------------------------------------
1688
1689 void wxWindowBase::MakeModal(bool modal)
1690 {
1691     // Disable all other windows
1692     if ( IsTopLevel() )
1693     {
1694         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1695         while (node)
1696         {
1697             wxWindow *win = node->GetData();
1698             if (win != this)
1699                 win->Enable(!modal);
1700
1701             node = node->GetNext();
1702         }
1703     }
1704 }
1705
1706 bool wxWindowBase::Validate()
1707 {
1708 #if wxUSE_VALIDATORS
1709     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1710
1711     wxWindowList::compatibility_iterator node;
1712     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1713     {
1714         wxWindowBase *child = node->GetData();
1715         wxValidator *validator = child->GetValidator();
1716         if ( validator && !validator->Validate((wxWindow *)this) )
1717         {
1718             return false;
1719         }
1720
1721         if ( recurse && !child->Validate() )
1722         {
1723             return false;
1724         }
1725     }
1726 #endif // wxUSE_VALIDATORS
1727
1728     return true;
1729 }
1730
1731 bool wxWindowBase::TransferDataToWindow()
1732 {
1733 #if wxUSE_VALIDATORS
1734     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1735
1736     wxWindowList::compatibility_iterator node;
1737     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1738     {
1739         wxWindowBase *child = node->GetData();
1740         wxValidator *validator = child->GetValidator();
1741         if ( validator && !validator->TransferToWindow() )
1742         {
1743             wxLogWarning(_("Could not transfer data to window"));
1744 #if wxUSE_LOG
1745             wxLog::FlushActive();
1746 #endif // wxUSE_LOG
1747
1748             return false;
1749         }
1750
1751         if ( recurse )
1752         {
1753             if ( !child->TransferDataToWindow() )
1754             {
1755                 // warning already given
1756                 return false;
1757             }
1758         }
1759     }
1760 #endif // wxUSE_VALIDATORS
1761
1762     return true;
1763 }
1764
1765 bool wxWindowBase::TransferDataFromWindow()
1766 {
1767 #if wxUSE_VALIDATORS
1768     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1769
1770     wxWindowList::compatibility_iterator node;
1771     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1772     {
1773         wxWindow *child = node->GetData();
1774         wxValidator *validator = child->GetValidator();
1775         if ( validator && !validator->TransferFromWindow() )
1776         {
1777             // nop warning here because the application is supposed to give
1778             // one itself - we don't know here what might have gone wrongly
1779
1780             return false;
1781         }
1782
1783         if ( recurse )
1784         {
1785             if ( !child->TransferDataFromWindow() )
1786             {
1787                 // warning already given
1788                 return false;
1789             }
1790         }
1791     }
1792 #endif // wxUSE_VALIDATORS
1793
1794     return true;
1795 }
1796
1797 void wxWindowBase::InitDialog()
1798 {
1799     wxInitDialogEvent event(GetId());
1800     event.SetEventObject( this );
1801     GetEventHandler()->ProcessEvent(event);
1802 }
1803
1804 // ----------------------------------------------------------------------------
1805 // context-sensitive help support
1806 // ----------------------------------------------------------------------------
1807
1808 #if wxUSE_HELP
1809
1810 // associate this help text with this window
1811 void wxWindowBase::SetHelpText(const wxString& text)
1812 {
1813     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1814     if ( helpProvider )
1815     {
1816         helpProvider->AddHelp(this, text);
1817     }
1818 }
1819
1820 #if WXWIN_COMPATIBILITY_2_8
1821 // associate this help text with all windows with the same id as this
1822 // one
1823 void wxWindowBase::SetHelpTextForId(const wxString& text)
1824 {
1825     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1826     if ( helpProvider )
1827     {
1828         helpProvider->AddHelp(GetId(), text);
1829     }
1830 }
1831 #endif // WXWIN_COMPATIBILITY_2_8
1832
1833 // get the help string associated with this window (may be empty)
1834 // default implementation forwards calls to the help provider
1835 wxString
1836 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
1837                                  wxHelpEvent::Origin WXUNUSED(origin)) const
1838 {
1839     wxString text;
1840     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1841     if ( helpProvider )
1842     {
1843         text = helpProvider->GetHelp(this);
1844     }
1845
1846     return text;
1847 }
1848
1849 // show help for this window
1850 void wxWindowBase::OnHelp(wxHelpEvent& event)
1851 {
1852     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1853     if ( helpProvider )
1854     {
1855         wxPoint pos = event.GetPosition();
1856         const wxHelpEvent::Origin origin = event.GetOrigin();
1857         if ( origin == wxHelpEvent::Origin_Keyboard )
1858         {
1859             // if the help event was generated from keyboard it shouldn't
1860             // appear at the mouse position (which is still the only position
1861             // associated with help event) if the mouse is far away, although
1862             // we still do use the mouse position if it's over the window
1863             // because we suppose the user looks approximately at the mouse
1864             // already and so it would be more convenient than showing tooltip
1865             // at some arbitrary position which can be quite far from it
1866             const wxRect rectClient = GetClientRect();
1867             if ( !rectClient.Contains(ScreenToClient(pos)) )
1868             {
1869                 // position help slightly under and to the right of this window
1870                 pos = ClientToScreen(wxPoint(
1871                         2*GetCharWidth(),
1872                         rectClient.height + GetCharHeight()
1873                       ));
1874             }
1875         }
1876
1877         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
1878         {
1879             // skip the event.Skip() below
1880             return;
1881         }
1882     }
1883
1884     event.Skip();
1885 }
1886
1887 #endif // wxUSE_HELP
1888
1889 // ----------------------------------------------------------------------------
1890 // tooltips
1891 // ----------------------------------------------------------------------------
1892
1893 #if wxUSE_TOOLTIPS
1894
1895 wxString wxWindowBase::GetToolTipText() const
1896 {
1897     return m_tooltip ? m_tooltip->GetTip() : wxString();
1898 }
1899
1900 void wxWindowBase::SetToolTip( const wxString &tip )
1901 {
1902     // don't create the new tooltip if we already have one
1903     if ( m_tooltip )
1904     {
1905         m_tooltip->SetTip( tip );
1906     }
1907     else
1908     {
1909         SetToolTip( new wxToolTip( tip ) );
1910     }
1911
1912     // setting empty tooltip text does not remove the tooltip any more - use
1913     // SetToolTip(NULL) for this
1914 }
1915
1916 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
1917 {
1918     if ( m_tooltip != tooltip )
1919     {
1920         if ( m_tooltip )
1921             delete m_tooltip;
1922
1923         m_tooltip = tooltip;
1924     }
1925 }
1926
1927 #endif // wxUSE_TOOLTIPS
1928
1929 // ----------------------------------------------------------------------------
1930 // constraints and sizers
1931 // ----------------------------------------------------------------------------
1932
1933 #if wxUSE_CONSTRAINTS
1934
1935 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
1936 {
1937     if ( m_constraints )
1938     {
1939         UnsetConstraints(m_constraints);
1940         delete m_constraints;
1941     }
1942     m_constraints = constraints;
1943     if ( m_constraints )
1944     {
1945         // Make sure other windows know they're part of a 'meaningful relationship'
1946         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
1947             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
1948         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
1949             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
1950         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
1951             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
1952         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
1953             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
1954         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
1955             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
1956         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
1957             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
1958         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
1959             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
1960         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
1961             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
1962     }
1963 }
1964
1965 // This removes any dangling pointers to this window in other windows'
1966 // constraintsInvolvedIn lists.
1967 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
1968 {
1969     if ( c )
1970     {
1971         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1972             c->left.GetOtherWindow()->RemoveConstraintReference(this);
1973         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1974             c->top.GetOtherWindow()->RemoveConstraintReference(this);
1975         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
1976             c->right.GetOtherWindow()->RemoveConstraintReference(this);
1977         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
1978             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
1979         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
1980             c->width.GetOtherWindow()->RemoveConstraintReference(this);
1981         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
1982             c->height.GetOtherWindow()->RemoveConstraintReference(this);
1983         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
1984             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
1985         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
1986             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
1987     }
1988 }
1989
1990 // Back-pointer to other windows we're involved with, so if we delete this
1991 // window, we must delete any constraints we're involved with.
1992 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
1993 {
1994     if ( !m_constraintsInvolvedIn )
1995         m_constraintsInvolvedIn = new wxWindowList;
1996     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
1997         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
1998 }
1999
2000 // REMOVE back-pointer to other windows we're involved with.
2001 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
2002 {
2003     if ( m_constraintsInvolvedIn )
2004         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
2005 }
2006
2007 // Reset any constraints that mention this window
2008 void wxWindowBase::DeleteRelatedConstraints()
2009 {
2010     if ( m_constraintsInvolvedIn )
2011     {
2012         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
2013         while (node)
2014         {
2015             wxWindow *win = node->GetData();
2016             wxLayoutConstraints *constr = win->GetConstraints();
2017
2018             // Reset any constraints involving this window
2019             if ( constr )
2020             {
2021                 constr->left.ResetIfWin(this);
2022                 constr->top.ResetIfWin(this);
2023                 constr->right.ResetIfWin(this);
2024                 constr->bottom.ResetIfWin(this);
2025                 constr->width.ResetIfWin(this);
2026                 constr->height.ResetIfWin(this);
2027                 constr->centreX.ResetIfWin(this);
2028                 constr->centreY.ResetIfWin(this);
2029             }
2030
2031             wxWindowList::compatibility_iterator next = node->GetNext();
2032             m_constraintsInvolvedIn->Erase(node);
2033             node = next;
2034         }
2035
2036         delete m_constraintsInvolvedIn;
2037         m_constraintsInvolvedIn = NULL;
2038     }
2039 }
2040
2041 #endif // wxUSE_CONSTRAINTS
2042
2043 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2044 {
2045     if ( sizer == m_windowSizer)
2046         return;
2047
2048     if ( m_windowSizer )
2049     {
2050         m_windowSizer->SetContainingWindow(NULL);
2051
2052         if ( deleteOld )
2053             delete m_windowSizer;
2054     }
2055
2056     m_windowSizer = sizer;
2057     if ( m_windowSizer )
2058     {
2059         m_windowSizer->SetContainingWindow((wxWindow *)this);
2060     }
2061
2062     SetAutoLayout(m_windowSizer != NULL);
2063 }
2064
2065 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2066 {
2067     SetSizer( sizer, deleteOld );
2068     sizer->SetSizeHints( (wxWindow*) this );
2069 }
2070
2071
2072 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2073 {
2074     // adding a window to a sizer twice is going to result in fatal and
2075     // hard to debug problems later because when deleting the second
2076     // associated wxSizerItem we're going to dereference a dangling
2077     // pointer; so try to detect this as early as possible
2078     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2079                   wxT("Adding a window to the same sizer twice?") );
2080
2081     m_containingSizer = sizer;
2082 }
2083
2084 #if wxUSE_CONSTRAINTS
2085
2086 void wxWindowBase::SatisfyConstraints()
2087 {
2088     wxLayoutConstraints *constr = GetConstraints();
2089     bool wasOk = constr && constr->AreSatisfied();
2090
2091     ResetConstraints();   // Mark all constraints as unevaluated
2092
2093     int noChanges = 1;
2094
2095     // if we're a top level panel (i.e. our parent is frame/dialog), our
2096     // own constraints will never be satisfied any more unless we do it
2097     // here
2098     if ( wasOk )
2099     {
2100         while ( noChanges > 0 )
2101         {
2102             LayoutPhase1(&noChanges);
2103         }
2104     }
2105
2106     LayoutPhase2(&noChanges);
2107 }
2108
2109 #endif // wxUSE_CONSTRAINTS
2110
2111 bool wxWindowBase::Layout()
2112 {
2113     // If there is a sizer, use it instead of the constraints
2114     if ( GetSizer() )
2115     {
2116         int w = 0, h = 0;
2117         GetVirtualSize(&w, &h);
2118         GetSizer()->SetDimension( 0, 0, w, h );
2119     }
2120 #if wxUSE_CONSTRAINTS
2121     else
2122     {
2123         SatisfyConstraints(); // Find the right constraints values
2124         SetConstraintSizes(); // Recursively set the real window sizes
2125     }
2126 #endif
2127
2128     return true;
2129 }
2130
2131 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2132 {
2133     if ( GetAutoLayout() )
2134         Layout();
2135
2136     event.Skip();
2137 }
2138
2139 #if wxUSE_CONSTRAINTS
2140
2141 // first phase of the constraints evaluation: set our own constraints
2142 bool wxWindowBase::LayoutPhase1(int *noChanges)
2143 {
2144     wxLayoutConstraints *constr = GetConstraints();
2145
2146     return !constr || constr->SatisfyConstraints(this, noChanges);
2147 }
2148
2149 // second phase: set the constraints for our children
2150 bool wxWindowBase::LayoutPhase2(int *noChanges)
2151 {
2152     *noChanges = 0;
2153
2154     // Layout children
2155     DoPhase(1);
2156
2157     // Layout grand children
2158     DoPhase(2);
2159
2160     return true;
2161 }
2162
2163 // Do a phase of evaluating child constraints
2164 bool wxWindowBase::DoPhase(int phase)
2165 {
2166     // the list containing the children for which the constraints are already
2167     // set correctly
2168     wxWindowList succeeded;
2169
2170     // the max number of iterations we loop before concluding that we can't set
2171     // the constraints
2172     static const int maxIterations = 500;
2173
2174     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2175     {
2176         int noChanges = 0;
2177
2178         // loop over all children setting their constraints
2179         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2180               node;
2181               node = node->GetNext() )
2182         {
2183             wxWindow *child = node->GetData();
2184             if ( child->IsTopLevel() )
2185             {
2186                 // top level children are not inside our client area
2187                 continue;
2188             }
2189
2190             if ( !child->GetConstraints() || succeeded.Find(child) )
2191             {
2192                 // this one is either already ok or nothing we can do about it
2193                 continue;
2194             }
2195
2196             int tempNoChanges = 0;
2197             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2198                                       : child->LayoutPhase2(&tempNoChanges);
2199             noChanges += tempNoChanges;
2200
2201             if ( success )
2202             {
2203                 succeeded.Append(child);
2204             }
2205         }
2206
2207         if ( !noChanges )
2208         {
2209             // constraints are set
2210             break;
2211         }
2212     }
2213
2214     return true;
2215 }
2216
2217 void wxWindowBase::ResetConstraints()
2218 {
2219     wxLayoutConstraints *constr = GetConstraints();
2220     if ( constr )
2221     {
2222         constr->left.SetDone(false);
2223         constr->top.SetDone(false);
2224         constr->right.SetDone(false);
2225         constr->bottom.SetDone(false);
2226         constr->width.SetDone(false);
2227         constr->height.SetDone(false);
2228         constr->centreX.SetDone(false);
2229         constr->centreY.SetDone(false);
2230     }
2231
2232     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2233     while (node)
2234     {
2235         wxWindow *win = node->GetData();
2236         if ( !win->IsTopLevel() )
2237             win->ResetConstraints();
2238         node = node->GetNext();
2239     }
2240 }
2241
2242 // Need to distinguish between setting the 'fake' size for windows and sizers,
2243 // and setting the real values.
2244 void wxWindowBase::SetConstraintSizes(bool recurse)
2245 {
2246     wxLayoutConstraints *constr = GetConstraints();
2247     if ( constr && constr->AreSatisfied() )
2248     {
2249         int x = constr->left.GetValue();
2250         int y = constr->top.GetValue();
2251         int w = constr->width.GetValue();
2252         int h = constr->height.GetValue();
2253
2254         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2255              (constr->height.GetRelationship() != wxAsIs) )
2256         {
2257             SetSize(x, y, w, h);
2258         }
2259         else
2260         {
2261             // If we don't want to resize this window, just move it...
2262             Move(x, y);
2263         }
2264     }
2265     else if ( constr )
2266     {
2267         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2268                    GetClassInfo()->GetClassName(),
2269                    GetName().c_str());
2270     }
2271
2272     if ( recurse )
2273     {
2274         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2275         while (node)
2276         {
2277             wxWindow *win = node->GetData();
2278             if ( !win->IsTopLevel() && win->GetConstraints() )
2279                 win->SetConstraintSizes();
2280             node = node->GetNext();
2281         }
2282     }
2283 }
2284
2285 // Only set the size/position of the constraint (if any)
2286 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2287 {
2288     wxLayoutConstraints *constr = GetConstraints();
2289     if ( constr )
2290     {
2291         if ( x != wxDefaultCoord )
2292         {
2293             constr->left.SetValue(x);
2294             constr->left.SetDone(true);
2295         }
2296         if ( y != wxDefaultCoord )
2297         {
2298             constr->top.SetValue(y);
2299             constr->top.SetDone(true);
2300         }
2301         if ( w != wxDefaultCoord )
2302         {
2303             constr->width.SetValue(w);
2304             constr->width.SetDone(true);
2305         }
2306         if ( h != wxDefaultCoord )
2307         {
2308             constr->height.SetValue(h);
2309             constr->height.SetDone(true);
2310         }
2311     }
2312 }
2313
2314 void wxWindowBase::MoveConstraint(int x, int y)
2315 {
2316     wxLayoutConstraints *constr = GetConstraints();
2317     if ( constr )
2318     {
2319         if ( x != wxDefaultCoord )
2320         {
2321             constr->left.SetValue(x);
2322             constr->left.SetDone(true);
2323         }
2324         if ( y != wxDefaultCoord )
2325         {
2326             constr->top.SetValue(y);
2327             constr->top.SetDone(true);
2328         }
2329     }
2330 }
2331
2332 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2333 {
2334     wxLayoutConstraints *constr = GetConstraints();
2335     if ( constr )
2336     {
2337         *w = constr->width.GetValue();
2338         *h = constr->height.GetValue();
2339     }
2340     else
2341         GetSize(w, h);
2342 }
2343
2344 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2345 {
2346     wxLayoutConstraints *constr = GetConstraints();
2347     if ( constr )
2348     {
2349         *w = constr->width.GetValue();
2350         *h = constr->height.GetValue();
2351     }
2352     else
2353         GetClientSize(w, h);
2354 }
2355
2356 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2357 {
2358     wxLayoutConstraints *constr = GetConstraints();
2359     if ( constr )
2360     {
2361         *x = constr->left.GetValue();
2362         *y = constr->top.GetValue();
2363     }
2364     else
2365         GetPosition(x, y);
2366 }
2367
2368 #endif // wxUSE_CONSTRAINTS
2369
2370 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2371 {
2372     // don't do it for the dialogs/frames - they float independently of their
2373     // parent
2374     if ( !IsTopLevel() )
2375     {
2376         wxWindow *parent = GetParent();
2377         if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2378         {
2379             wxPoint pt(parent->GetClientAreaOrigin());
2380             x += pt.x;
2381             y += pt.y;
2382         }
2383     }
2384 }
2385
2386 // ----------------------------------------------------------------------------
2387 // Update UI processing
2388 // ----------------------------------------------------------------------------
2389
2390 void wxWindowBase::UpdateWindowUI(long flags)
2391 {
2392     wxUpdateUIEvent event(GetId());
2393     event.SetEventObject(this);
2394
2395     if ( GetEventHandler()->ProcessEvent(event) )
2396     {
2397         DoUpdateWindowUI(event);
2398     }
2399
2400     if (flags & wxUPDATE_UI_RECURSE)
2401     {
2402         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2403         while (node)
2404         {
2405             wxWindow* child = (wxWindow*) node->GetData();
2406             child->UpdateWindowUI(flags);
2407             node = node->GetNext();
2408         }
2409     }
2410 }
2411
2412 // do the window-specific processing after processing the update event
2413 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2414 {
2415     if ( event.GetSetEnabled() )
2416         Enable(event.GetEnabled());
2417
2418     if ( event.GetSetShown() )
2419         Show(event.GetShown());
2420 }
2421
2422 // ----------------------------------------------------------------------------
2423 // dialog units translations
2424 // ----------------------------------------------------------------------------
2425
2426 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
2427 {
2428     int charWidth = GetCharWidth();
2429     int charHeight = GetCharHeight();
2430     wxPoint pt2 = wxDefaultPosition;
2431     if (pt.x != wxDefaultCoord)
2432         pt2.x = (int) ((pt.x * 4) / charWidth);
2433     if (pt.y != wxDefaultCoord)
2434         pt2.y = (int) ((pt.y * 8) / charHeight);
2435
2436     return pt2;
2437 }
2438
2439 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
2440 {
2441     int charWidth = GetCharWidth();
2442     int charHeight = GetCharHeight();
2443     wxPoint pt2 = wxDefaultPosition;
2444     if (pt.x != wxDefaultCoord)
2445         pt2.x = (int) ((pt.x * charWidth) / 4);
2446     if (pt.y != wxDefaultCoord)
2447         pt2.y = (int) ((pt.y * charHeight) / 8);
2448
2449     return pt2;
2450 }
2451
2452 // ----------------------------------------------------------------------------
2453 // event handlers
2454 // ----------------------------------------------------------------------------
2455
2456 // propagate the colour change event to the subwindows
2457 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
2458 {
2459     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2460     while ( node )
2461     {
2462         // Only propagate to non-top-level windows
2463         wxWindow *win = node->GetData();
2464         if ( !win->IsTopLevel() )
2465         {
2466             wxSysColourChangedEvent event2;
2467             event.SetEventObject(win);
2468             win->GetEventHandler()->ProcessEvent(event2);
2469         }
2470
2471         node = node->GetNext();
2472     }
2473
2474     Refresh();
2475 }
2476
2477 // the default action is to populate dialog with data when it's created,
2478 // and nudge the UI into displaying itself correctly in case
2479 // we've turned the wxUpdateUIEvents frequency down low.
2480 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2481 {
2482     TransferDataToWindow();
2483
2484     // Update the UI at this point
2485     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2486 }
2487
2488 // ----------------------------------------------------------------------------
2489 // menu-related functions
2490 // ----------------------------------------------------------------------------
2491
2492 #if wxUSE_MENUS
2493
2494 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2495 {
2496     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2497
2498     wxCurrentPopupMenu = menu;
2499     const bool rc = DoPopupMenu(menu, x, y);
2500     wxCurrentPopupMenu = NULL;
2501
2502     return rc;
2503 }
2504
2505 // this is used to pass the id of the selected item from the menu event handler
2506 // to the main function itself
2507 //
2508 // it's ok to use a global here as there can be at most one popup menu shown at
2509 // any time
2510 static int gs_popupMenuSelection = wxID_NONE;
2511
2512 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2513 {
2514     // store the id in a global variable where we'll retrieve it from later
2515     gs_popupMenuSelection = event.GetId();
2516 }
2517
2518 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2519 {
2520     // nothing to do but do not skip it
2521 }
2522
2523 int
2524 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2525 {
2526     gs_popupMenuSelection = wxID_NONE;
2527
2528     Connect(wxEVT_COMMAND_MENU_SELECTED,
2529             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2530             NULL,
2531             this);
2532
2533     // it is common to construct the menu passed to this function dynamically
2534     // using some fixed range of ids which could clash with the ids used
2535     // elsewhere in the program, which could result in some menu items being
2536     // unintentionally disabled or otherwise modified by update UI handlers
2537     // elsewhere in the program code and this is difficult to avoid in the
2538     // program itself, so instead we just temporarily suspend UI updating while
2539     // this menu is shown
2540     Connect(wxEVT_UPDATE_UI,
2541             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2542             NULL,
2543             this);
2544
2545     PopupMenu(&menu, x, y);
2546
2547     Disconnect(wxEVT_UPDATE_UI,
2548                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2549                NULL,
2550                this);
2551     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2552                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2553                NULL,
2554                this);
2555
2556     return gs_popupMenuSelection;
2557 }
2558
2559 #endif // wxUSE_MENUS
2560
2561 // methods for drawing the sizers in a visible way: this is currently only
2562 // enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
2563 // that well and also because we don't want to leave it enabled in default
2564 // builds used for production
2565 #if wxDEBUG_LEVEL > 1
2566
2567 static void DrawSizers(wxWindowBase *win);
2568
2569 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2570 {
2571     wxClientDC dc((wxWindow *)win);
2572     dc.SetPen(*pen);
2573     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2574                        *wxTRANSPARENT_BRUSH);
2575     dc.DrawRectangle(rect.Deflate(1, 1));
2576 }
2577
2578 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2579 {
2580     const wxSizerItemList& items = sizer->GetChildren();
2581     for ( wxSizerItemList::const_iterator i = items.begin(),
2582                                         end = items.end();
2583           i != end;
2584           ++i )
2585     {
2586         wxSizerItem *item = *i;
2587         if ( item->IsSizer() )
2588         {
2589             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2590             DrawSizer(win, item->GetSizer());
2591         }
2592         else if ( item->IsSpacer() )
2593         {
2594             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2595         }
2596         else if ( item->IsWindow() )
2597         {
2598             DrawSizers(item->GetWindow());
2599         }
2600         else
2601             wxFAIL_MSG("inconsistent wxSizerItem status!");
2602     }
2603 }
2604
2605 static void DrawSizers(wxWindowBase *win)
2606 {
2607     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2608
2609     wxSizer *sizer = win->GetSizer();
2610     if ( sizer )
2611     {
2612         DrawSizer(win, sizer);
2613     }
2614     else // no sizer, still recurse into the children
2615     {
2616         const wxWindowList& children = win->GetChildren();
2617         for ( wxWindowList::const_iterator i = children.begin(),
2618                                          end = children.end();
2619               i != end;
2620               ++i )
2621         {
2622             DrawSizers(*i);
2623         }
2624
2625         // show all kind of sizes of this window; see the "window sizing" topic
2626         // overview for more info about the various differences:
2627         wxSize fullSz = win->GetSize();
2628         wxSize clientSz = win->GetClientSize();
2629         wxSize bestSz = win->GetBestSize();
2630         wxSize minSz = win->GetMinSize();
2631         wxSize maxSz = win->GetMaxSize();
2632         wxSize virtualSz = win->GetVirtualSize();
2633
2634         wxMessageOutputDebug dbgout;
2635         dbgout.Printf(
2636             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
2637             win->GetName(),
2638             fullSz.x, fullSz.y,
2639             clientSz.x, clientSz.y,
2640             bestSz.x, bestSz.y,
2641             minSz.x, minSz.y,
2642             maxSz.x, maxSz.y,
2643             virtualSz.x, virtualSz.y);
2644     }
2645 }
2646
2647 #endif // wxDEBUG_LEVEL
2648
2649 // process special middle clicks
2650 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
2651 {
2652     if ( event.ControlDown() && event.AltDown() )
2653     {
2654 #if wxDEBUG_LEVEL > 1
2655         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
2656         if ( event.ShiftDown() )
2657         {
2658             DrawSizers(this);
2659         }
2660         else
2661 #endif // __WXDEBUG__
2662         {
2663             // just Ctrl-Alt-middle click shows information about wx version
2664             ::wxInfoMessageBox((wxWindow*)this);
2665         }
2666     }
2667     else
2668     {
2669         event.Skip();
2670     }
2671 }
2672
2673 // ----------------------------------------------------------------------------
2674 // accessibility
2675 // ----------------------------------------------------------------------------
2676
2677 #if wxUSE_ACCESSIBILITY
2678 void wxWindowBase::SetAccessible(wxAccessible* accessible)
2679 {
2680     if (m_accessible && (accessible != m_accessible))
2681         delete m_accessible;
2682     m_accessible = accessible;
2683     if (m_accessible)
2684         m_accessible->SetWindow((wxWindow*) this);
2685 }
2686
2687 // Returns the accessible object, creating if necessary.
2688 wxAccessible* wxWindowBase::GetOrCreateAccessible()
2689 {
2690     if (!m_accessible)
2691         m_accessible = CreateAccessible();
2692     return m_accessible;
2693 }
2694
2695 // Override to create a specific accessible object.
2696 wxAccessible* wxWindowBase::CreateAccessible()
2697 {
2698     return new wxWindowAccessible((wxWindow*) this);
2699 }
2700
2701 #endif
2702
2703 // ----------------------------------------------------------------------------
2704 // list classes implementation
2705 // ----------------------------------------------------------------------------
2706
2707 #if wxUSE_STL
2708
2709 #include "wx/listimpl.cpp"
2710 WX_DEFINE_LIST(wxWindowList)
2711
2712 #else // !wxUSE_STL
2713
2714 void wxWindowListNode::DeleteData()
2715 {
2716     delete (wxWindow *)GetData();
2717 }
2718
2719 #endif // wxUSE_STL/!wxUSE_STL
2720
2721 // ----------------------------------------------------------------------------
2722 // borders
2723 // ----------------------------------------------------------------------------
2724
2725 wxBorder wxWindowBase::GetBorder(long flags) const
2726 {
2727     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
2728     if ( border == wxBORDER_DEFAULT )
2729     {
2730         border = GetDefaultBorder();
2731     }
2732     else if ( border == wxBORDER_THEME )
2733     {
2734         border = GetDefaultBorderForControl();
2735     }
2736
2737     return border;
2738 }
2739
2740 wxBorder wxWindowBase::GetDefaultBorder() const
2741 {
2742     return wxBORDER_NONE;
2743 }
2744
2745 // ----------------------------------------------------------------------------
2746 // hit testing
2747 // ----------------------------------------------------------------------------
2748
2749 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
2750 {
2751     // here we just check if the point is inside the window or not
2752
2753     // check the top and left border first
2754     bool outside = x < 0 || y < 0;
2755     if ( !outside )
2756     {
2757         // check the right and bottom borders too
2758         wxSize size = GetSize();
2759         outside = x >= size.x || y >= size.y;
2760     }
2761
2762     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
2763 }
2764
2765 // ----------------------------------------------------------------------------
2766 // mouse capture
2767 // ----------------------------------------------------------------------------
2768
2769 struct WXDLLEXPORT wxWindowNext
2770 {
2771     wxWindow *win;
2772     wxWindowNext *next;
2773 } *wxWindowBase::ms_winCaptureNext = NULL;
2774 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
2775 bool wxWindowBase::ms_winCaptureChanging = false;
2776
2777 void wxWindowBase::CaptureMouse()
2778 {
2779     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
2780
2781     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
2782
2783     ms_winCaptureChanging = true;
2784
2785     wxWindow *winOld = GetCapture();
2786     if ( winOld )
2787     {
2788         ((wxWindowBase*) winOld)->DoReleaseMouse();
2789
2790         // save it on stack
2791         wxWindowNext *item = new wxWindowNext;
2792         item->win = winOld;
2793         item->next = ms_winCaptureNext;
2794         ms_winCaptureNext = item;
2795     }
2796     //else: no mouse capture to save
2797
2798     DoCaptureMouse();
2799     ms_winCaptureCurrent = (wxWindow*)this;
2800
2801     ms_winCaptureChanging = false;
2802 }
2803
2804 void wxWindowBase::ReleaseMouse()
2805 {
2806     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
2807
2808     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
2809
2810     wxASSERT_MSG( GetCapture() == this,
2811                   "attempt to release mouse, but this window hasn't captured it" );
2812     wxASSERT_MSG( ms_winCaptureCurrent == this,
2813                   "attempt to release mouse, but this window hasn't captured it" );
2814
2815     ms_winCaptureChanging = true;
2816
2817     DoReleaseMouse();
2818     ms_winCaptureCurrent = NULL;
2819
2820     if ( ms_winCaptureNext )
2821     {
2822         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
2823         ms_winCaptureCurrent = ms_winCaptureNext->win;
2824
2825         wxWindowNext *item = ms_winCaptureNext;
2826         ms_winCaptureNext = item->next;
2827         delete item;
2828     }
2829     //else: stack is empty, no previous capture
2830
2831     ms_winCaptureChanging = false;
2832
2833     wxLogTrace(wxT("mousecapture"),
2834         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
2835         static_cast<void*>(GetCapture()));
2836 }
2837
2838 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
2839 {
2840     wxMouseCaptureLostEvent event(win->GetId());
2841     event.SetEventObject(win);
2842     if ( !win->GetEventHandler()->ProcessEvent(event) )
2843     {
2844         // windows must handle this event, otherwise the app wouldn't behave
2845         // correctly if it loses capture unexpectedly; see the discussion here:
2846         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
2847         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
2848         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
2849     }
2850 }
2851
2852 /* static */
2853 void wxWindowBase::NotifyCaptureLost()
2854 {
2855     // don't do anything if capture lost was expected, i.e. resulted from
2856     // a wx call to ReleaseMouse or CaptureMouse:
2857     if ( ms_winCaptureChanging )
2858         return;
2859
2860     // if the capture was lost unexpectedly, notify every window that has
2861     // capture (on stack or current) about it and clear the stack:
2862
2863     if ( ms_winCaptureCurrent )
2864     {
2865         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
2866         ms_winCaptureCurrent = NULL;
2867     }
2868
2869     while ( ms_winCaptureNext )
2870     {
2871         wxWindowNext *item = ms_winCaptureNext;
2872         ms_winCaptureNext = item->next;
2873
2874         DoNotifyWindowAboutCaptureLost(item->win);
2875
2876         delete item;
2877     }
2878 }
2879
2880 #if wxUSE_HOTKEY
2881
2882 bool
2883 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
2884                              int WXUNUSED(modifiers),
2885                              int WXUNUSED(keycode))
2886 {
2887     // not implemented
2888     return false;
2889 }
2890
2891 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
2892 {
2893     // not implemented
2894     return false;
2895 }
2896
2897 #endif // wxUSE_HOTKEY
2898
2899 // ----------------------------------------------------------------------------
2900 // event processing
2901 // ----------------------------------------------------------------------------
2902
2903 bool wxWindowBase::TryBefore(wxEvent& event)
2904 {
2905 #if wxUSE_VALIDATORS
2906     // Can only use the validator of the window which
2907     // is receiving the event
2908     if ( event.GetEventObject() == this )
2909     {
2910         wxValidator * const validator = GetValidator();
2911         if ( validator && validator->ProcessEventHere(event) )
2912         {
2913             return true;
2914         }
2915     }
2916 #endif // wxUSE_VALIDATORS
2917
2918     return wxEvtHandler::TryBefore(event);
2919 }
2920
2921 bool wxWindowBase::TryAfter(wxEvent& event)
2922 {
2923     // carry on up the parent-child hierarchy if the propagation count hasn't
2924     // reached zero yet
2925     if ( event.ShouldPropagate() )
2926     {
2927         // honour the requests to stop propagation at this window: this is
2928         // used by the dialogs, for example, to prevent processing the events
2929         // from the dialog controls in the parent frame which rarely, if ever,
2930         // makes sense
2931         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
2932         {
2933             wxWindow *parent = GetParent();
2934             if ( parent && !parent->IsBeingDeleted() )
2935             {
2936                 wxPropagateOnce propagateOnce(event);
2937
2938                 return parent->GetEventHandler()->ProcessEvent(event);
2939             }
2940         }
2941     }
2942
2943     return wxEvtHandler::TryAfter(event);
2944 }
2945
2946 // ----------------------------------------------------------------------------
2947 // window relationships
2948 // ----------------------------------------------------------------------------
2949
2950 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
2951 {
2952     wxCHECK_MSG( GetParent(), NULL,
2953                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
2954
2955     wxWindowList& siblings = GetParent()->GetChildren();
2956     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
2957     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
2958
2959     if ( order == OrderBefore )
2960         i = i->GetPrevious();
2961     else // OrderAfter
2962         i = i->GetNext();
2963
2964     return i ? i->GetData() : NULL;
2965 }
2966
2967 // ----------------------------------------------------------------------------
2968 // keyboard navigation
2969 // ----------------------------------------------------------------------------
2970
2971 // Navigates in the specified direction inside this window
2972 bool wxWindowBase::DoNavigateIn(int flags)
2973 {
2974 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
2975     // native code doesn't process our wxNavigationKeyEvents anyhow
2976     wxUnusedVar(flags);
2977     return false;
2978 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
2979     wxNavigationKeyEvent eventNav;
2980     wxWindow *focused = FindFocus();
2981     eventNav.SetCurrentFocus(focused);
2982     eventNav.SetEventObject(focused);
2983     eventNav.SetFlags(flags);
2984     return GetEventHandler()->ProcessEvent(eventNav);
2985 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
2986 }
2987
2988 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
2989 {
2990     if ( event.GetKeyCode() != WXK_TAB )
2991         return false;
2992
2993     int flags = wxNavigationKeyEvent::FromTab;
2994
2995     if ( event.ShiftDown() )
2996         flags |= wxNavigationKeyEvent::IsBackward;
2997     else
2998         flags |= wxNavigationKeyEvent::IsForward;
2999
3000     if ( event.ControlDown() )
3001         flags |= wxNavigationKeyEvent::WinChange;
3002
3003     Navigate(flags);
3004     return true;
3005 }
3006
3007 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
3008 {
3009     // check that we're not a top level window
3010     wxCHECK_RET( GetParent(),
3011                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
3012
3013     // detect the special case when we have nothing to do anyhow and when the
3014     // code below wouldn't work
3015     if ( win == this )
3016         return;
3017
3018     // find the target window in the siblings list
3019     wxWindowList& siblings = GetParent()->GetChildren();
3020     wxWindowList::compatibility_iterator i = siblings.Find(win);
3021     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3022
3023     // unfortunately, when wxUSE_STL == 1 DetachNode() is not implemented so we
3024     // can't just move the node around
3025     wxWindow *self = (wxWindow *)this;
3026     siblings.DeleteObject(self);
3027     if ( move == OrderAfter )
3028     {
3029         i = i->GetNext();
3030     }
3031
3032     if ( i )
3033     {
3034         siblings.Insert(i, self);
3035     }
3036     else // OrderAfter and win was the last sibling
3037     {
3038         siblings.Append(self);
3039     }
3040 }
3041
3042 // ----------------------------------------------------------------------------
3043 // focus handling
3044 // ----------------------------------------------------------------------------
3045
3046 /*static*/ wxWindow* wxWindowBase::FindFocus()
3047 {
3048     wxWindowBase *win = DoFindFocus();
3049     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3050 }
3051
3052 bool wxWindowBase::HasFocus() const
3053 {
3054     wxWindowBase *win = DoFindFocus();
3055     return win == this ||
3056            win == wxConstCast(this, wxWindowBase)->GetMainWindowOfCompositeControl();
3057 }
3058
3059 // ----------------------------------------------------------------------------
3060 // drag and drop
3061 // ----------------------------------------------------------------------------
3062
3063 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3064
3065 namespace
3066 {
3067
3068 class DragAcceptFilesTarget : public wxFileDropTarget
3069 {
3070 public:
3071     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3072
3073     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3074                              const wxArrayString& filenames)
3075     {
3076         wxDropFilesEvent event(wxEVT_DROP_FILES,
3077                                filenames.size(),
3078                                wxCArrayString(filenames).Release());
3079         event.SetEventObject(m_win);
3080         event.m_pos.x = x;
3081         event.m_pos.y = y;
3082
3083         return m_win->HandleWindowEvent(event);
3084     }
3085
3086 private:
3087     wxWindowBase * const m_win;
3088
3089     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3090 };
3091
3092
3093 } // anonymous namespace
3094
3095 // Generic version of DragAcceptFiles(). It works by installing a simple
3096 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3097 // together with explicit SetDropTarget() calls.
3098 void wxWindowBase::DragAcceptFiles(bool accept)
3099 {
3100     if ( accept )
3101     {
3102         wxASSERT_MSG( !GetDropTarget(),
3103                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3104         SetDropTarget(new DragAcceptFilesTarget(this));
3105     }
3106     else
3107     {
3108         SetDropTarget(NULL);
3109     }
3110 }
3111
3112 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3113
3114 // ----------------------------------------------------------------------------
3115 // global functions
3116 // ----------------------------------------------------------------------------
3117
3118 wxWindow* wxGetTopLevelParent(wxWindow *win)
3119 {
3120     while ( win && !win->IsTopLevel() )
3121          win = win->GetParent();
3122
3123     return win;
3124 }
3125
3126 #if wxUSE_ACCESSIBILITY
3127 // ----------------------------------------------------------------------------
3128 // accessible object for windows
3129 // ----------------------------------------------------------------------------
3130
3131 // Can return either a child object, or an integer
3132 // representing the child element, starting from 1.
3133 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3134 {
3135     wxASSERT( GetWindow() != NULL );
3136     if (!GetWindow())
3137         return wxACC_FAIL;
3138
3139     return wxACC_NOT_IMPLEMENTED;
3140 }
3141
3142 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3143 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3144 {
3145     wxASSERT( GetWindow() != NULL );
3146     if (!GetWindow())
3147         return wxACC_FAIL;
3148
3149     wxWindow* win = NULL;
3150     if (elementId == 0)
3151     {
3152         win = GetWindow();
3153     }
3154     else
3155     {
3156         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3157         {
3158             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3159         }
3160         else
3161             return wxACC_FAIL;
3162     }
3163     if (win)
3164     {
3165         rect = win->GetRect();
3166         if (win->GetParent() && !win->IsKindOf(CLASSINFO(wxTopLevelWindow)))
3167             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3168         return wxACC_OK;
3169     }
3170
3171     return wxACC_NOT_IMPLEMENTED;
3172 }
3173
3174 // Navigates from fromId to toId/toObject.
3175 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3176                              int* WXUNUSED(toId), wxAccessible** toObject)
3177 {
3178     wxASSERT( GetWindow() != NULL );
3179     if (!GetWindow())
3180         return wxACC_FAIL;
3181
3182     switch (navDir)
3183     {
3184     case wxNAVDIR_FIRSTCHILD:
3185         {
3186             if (GetWindow()->GetChildren().GetCount() == 0)
3187                 return wxACC_FALSE;
3188             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3189             *toObject = childWindow->GetOrCreateAccessible();
3190
3191             return wxACC_OK;
3192         }
3193     case wxNAVDIR_LASTCHILD:
3194         {
3195             if (GetWindow()->GetChildren().GetCount() == 0)
3196                 return wxACC_FALSE;
3197             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3198             *toObject = childWindow->GetOrCreateAccessible();
3199
3200             return wxACC_OK;
3201         }
3202     case wxNAVDIR_RIGHT:
3203     case wxNAVDIR_DOWN:
3204     case wxNAVDIR_NEXT:
3205         {
3206             wxWindowList::compatibility_iterator node =
3207                 wxWindowList::compatibility_iterator();
3208             if (fromId == 0)
3209             {
3210                 // Can't navigate to sibling of this window
3211                 // if we're a top-level window.
3212                 if (!GetWindow()->GetParent())
3213                     return wxACC_NOT_IMPLEMENTED;
3214
3215                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3216             }
3217             else
3218             {
3219                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3220                     node = GetWindow()->GetChildren().Item(fromId-1);
3221             }
3222
3223             if (node && node->GetNext())
3224             {
3225                 wxWindow* nextWindow = node->GetNext()->GetData();
3226                 *toObject = nextWindow->GetOrCreateAccessible();
3227                 return wxACC_OK;
3228             }
3229             else
3230                 return wxACC_FALSE;
3231         }
3232     case wxNAVDIR_LEFT:
3233     case wxNAVDIR_UP:
3234     case wxNAVDIR_PREVIOUS:
3235         {
3236             wxWindowList::compatibility_iterator node =
3237                 wxWindowList::compatibility_iterator();
3238             if (fromId == 0)
3239             {
3240                 // Can't navigate to sibling of this window
3241                 // if we're a top-level window.
3242                 if (!GetWindow()->GetParent())
3243                     return wxACC_NOT_IMPLEMENTED;
3244
3245                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3246             }
3247             else
3248             {
3249                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3250                     node = GetWindow()->GetChildren().Item(fromId-1);
3251             }
3252
3253             if (node && node->GetPrevious())
3254             {
3255                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3256                 *toObject = previousWindow->GetOrCreateAccessible();
3257                 return wxACC_OK;
3258             }
3259             else
3260                 return wxACC_FALSE;
3261         }
3262     }
3263
3264     return wxACC_NOT_IMPLEMENTED;
3265 }
3266
3267 // Gets the name of the specified object.
3268 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3269 {
3270     wxASSERT( GetWindow() != NULL );
3271     if (!GetWindow())
3272         return wxACC_FAIL;
3273
3274     wxString title;
3275
3276     // If a child, leave wxWidgets to call the function on the actual
3277     // child object.
3278     if (childId > 0)
3279         return wxACC_NOT_IMPLEMENTED;
3280
3281     // This will eventually be replaced by specialised
3282     // accessible classes, one for each kind of wxWidgets
3283     // control or window.
3284 #if wxUSE_BUTTON
3285     if (GetWindow()->IsKindOf(CLASSINFO(wxButton)))
3286         title = ((wxButton*) GetWindow())->GetLabel();
3287     else
3288 #endif
3289         title = GetWindow()->GetName();
3290
3291     if (!title.empty())
3292     {
3293         *name = title;
3294         return wxACC_OK;
3295     }
3296     else
3297         return wxACC_NOT_IMPLEMENTED;
3298 }
3299
3300 // Gets the number of children.
3301 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3302 {
3303     wxASSERT( GetWindow() != NULL );
3304     if (!GetWindow())
3305         return wxACC_FAIL;
3306
3307     *childId = (int) GetWindow()->GetChildren().GetCount();
3308     return wxACC_OK;
3309 }
3310
3311 // Gets the specified child (starting from 1).
3312 // If *child is NULL and return value is wxACC_OK,
3313 // this means that the child is a simple element and
3314 // not an accessible object.
3315 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3316 {
3317     wxASSERT( GetWindow() != NULL );
3318     if (!GetWindow())
3319         return wxACC_FAIL;
3320
3321     if (childId == 0)
3322     {
3323         *child = this;
3324         return wxACC_OK;
3325     }
3326
3327     if (childId > (int) GetWindow()->GetChildren().GetCount())
3328         return wxACC_FAIL;
3329
3330     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3331     *child = childWindow->GetOrCreateAccessible();
3332     if (*child)
3333         return wxACC_OK;
3334     else
3335         return wxACC_FAIL;
3336 }
3337
3338 // Gets the parent, or NULL.
3339 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3340 {
3341     wxASSERT( GetWindow() != NULL );
3342     if (!GetWindow())
3343         return wxACC_FAIL;
3344
3345     wxWindow* parentWindow = GetWindow()->GetParent();
3346     if (!parentWindow)
3347     {
3348         *parent = NULL;
3349         return wxACC_OK;
3350     }
3351     else
3352     {
3353         *parent = parentWindow->GetOrCreateAccessible();
3354         if (*parent)
3355             return wxACC_OK;
3356         else
3357             return wxACC_FAIL;
3358     }
3359 }
3360
3361 // Performs the default action. childId is 0 (the action for this object)
3362 // or > 0 (the action for a child).
3363 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3364 // window (e.g. an edit control).
3365 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3366 {
3367     wxASSERT( GetWindow() != NULL );
3368     if (!GetWindow())
3369         return wxACC_FAIL;
3370
3371     return wxACC_NOT_IMPLEMENTED;
3372 }
3373
3374 // Gets the default action for this object (0) or > 0 (the action for a child).
3375 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3376 // string if there is no action.
3377 // The retrieved string describes the action that is performed on an object,
3378 // not what the object does as a result. For example, a toolbar button that prints
3379 // a document has a default action of "Press" rather than "Prints the current document."
3380 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3381 {
3382     wxASSERT( GetWindow() != NULL );
3383     if (!GetWindow())
3384         return wxACC_FAIL;
3385
3386     return wxACC_NOT_IMPLEMENTED;
3387 }
3388
3389 // Returns the description for this object or a child.
3390 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3391 {
3392     wxASSERT( GetWindow() != NULL );
3393     if (!GetWindow())
3394         return wxACC_FAIL;
3395
3396     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3397     if (!ht.empty())
3398     {
3399         *description = ht;
3400         return wxACC_OK;
3401     }
3402     return wxACC_NOT_IMPLEMENTED;
3403 }
3404
3405 // Returns help text for this object or a child, similar to tooltip text.
3406 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3407 {
3408     wxASSERT( GetWindow() != NULL );
3409     if (!GetWindow())
3410         return wxACC_FAIL;
3411
3412     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3413     if (!ht.empty())
3414     {
3415         *helpText = ht;
3416         return wxACC_OK;
3417     }
3418     return wxACC_NOT_IMPLEMENTED;
3419 }
3420
3421 // Returns the keyboard shortcut for this object or child.
3422 // Return e.g. ALT+K
3423 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3424 {
3425     wxASSERT( GetWindow() != NULL );
3426     if (!GetWindow())
3427         return wxACC_FAIL;
3428
3429     return wxACC_NOT_IMPLEMENTED;
3430 }
3431
3432 // Returns a role constant.
3433 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3434 {
3435     wxASSERT( GetWindow() != NULL );
3436     if (!GetWindow())
3437         return wxACC_FAIL;
3438
3439     // If a child, leave wxWidgets to call the function on the actual
3440     // child object.
3441     if (childId > 0)
3442         return wxACC_NOT_IMPLEMENTED;
3443
3444     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3445         return wxACC_NOT_IMPLEMENTED;
3446 #if wxUSE_STATUSBAR
3447     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3448         return wxACC_NOT_IMPLEMENTED;
3449 #endif
3450 #if wxUSE_TOOLBAR
3451     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3452         return wxACC_NOT_IMPLEMENTED;
3453 #endif
3454
3455     //*role = wxROLE_SYSTEM_CLIENT;
3456     *role = wxROLE_SYSTEM_CLIENT;
3457     return wxACC_OK;
3458
3459     #if 0
3460     return wxACC_NOT_IMPLEMENTED;
3461     #endif
3462 }
3463
3464 // Returns a state constant.
3465 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3466 {
3467     wxASSERT( GetWindow() != NULL );
3468     if (!GetWindow())
3469         return wxACC_FAIL;
3470
3471     // If a child, leave wxWidgets to call the function on the actual
3472     // child object.
3473     if (childId > 0)
3474         return wxACC_NOT_IMPLEMENTED;
3475
3476     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3477         return wxACC_NOT_IMPLEMENTED;
3478
3479 #if wxUSE_STATUSBAR
3480     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3481         return wxACC_NOT_IMPLEMENTED;
3482 #endif
3483 #if wxUSE_TOOLBAR
3484     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3485         return wxACC_NOT_IMPLEMENTED;
3486 #endif
3487
3488     *state = 0;
3489     return wxACC_OK;
3490
3491     #if 0
3492     return wxACC_NOT_IMPLEMENTED;
3493     #endif
3494 }
3495
3496 // Returns a localized string representing the value for the object
3497 // or child.
3498 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3499 {
3500     wxASSERT( GetWindow() != NULL );
3501     if (!GetWindow())
3502         return wxACC_FAIL;
3503
3504     return wxACC_NOT_IMPLEMENTED;
3505 }
3506
3507 // Selects the object or child.
3508 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3509 {
3510     wxASSERT( GetWindow() != NULL );
3511     if (!GetWindow())
3512         return wxACC_FAIL;
3513
3514     return wxACC_NOT_IMPLEMENTED;
3515 }
3516
3517 // Gets the window with the keyboard focus.
3518 // If childId is 0 and child is NULL, no object in
3519 // this subhierarchy has the focus.
3520 // If this object has the focus, child should be 'this'.
3521 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3522 {
3523     wxASSERT( GetWindow() != NULL );
3524     if (!GetWindow())
3525         return wxACC_FAIL;
3526
3527     return wxACC_NOT_IMPLEMENTED;
3528 }
3529
3530 #if wxUSE_VARIANT
3531 // Gets a variant representing the selected children
3532 // of this object.
3533 // Acceptable values:
3534 // - a null variant (IsNull() returns true)
3535 // - a list variant (GetType() == wxT("list")
3536 // - an integer representing the selected child element,
3537 //   or 0 if this object is selected (GetType() == wxT("long")
3538 // - a "void*" pointer to a wxAccessible child object
3539 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3540 {
3541     wxASSERT( GetWindow() != NULL );
3542     if (!GetWindow())
3543         return wxACC_FAIL;
3544
3545     return wxACC_NOT_IMPLEMENTED;
3546 }
3547 #endif // wxUSE_VARIANT
3548
3549 #endif // wxUSE_ACCESSIBILITY
3550
3551 // ----------------------------------------------------------------------------
3552 // RTL support
3553 // ----------------------------------------------------------------------------
3554
3555 wxCoord
3556 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3557                                        wxCoord width,
3558                                        wxCoord widthTotal) const
3559 {
3560     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3561     {
3562         x = widthTotal - x - width;
3563     }
3564
3565     return x;
3566 }
3567
3568