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 #include "wx/private/window.h"
  77
  78 #ifdef __WXMSW__
  79     #include "wx/msw/wrapwin.h"
  80 #endif
  81
  82 // Windows List
  83 WXDLLIMPEXP_DATA_CORE(wxWindowList) wxTopLevelWindows;
  84
  85 // globals
  86 #if wxUSE_MENUS
  87 wxMenu *wxCurrentPopupMenu = NULL;
  88 #endif // wxUSE_MENUS
  89
  90 // ----------------------------------------------------------------------------
  91 // static data
  92 // ----------------------------------------------------------------------------
  93
  94
  95 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  96
  97 // ----------------------------------------------------------------------------
  98 // event table
  99 // ----------------------------------------------------------------------------
 100
 101 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
 102     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
 103     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
 104     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
 105
 106 #if wxUSE_HELP
 107     EVT_HELP(wxID_ANY, wxWindowBase::OnHelp)
 108 #endif // wxUSE_HELP
 109
 110     EVT_SIZE(wxWindowBase::InternalOnSize)
 111 END_EVENT_TABLE()
 112
 113 // ============================================================================
 114 // implementation of the common functionality of the wxWindow class
 115 // ============================================================================
 116
 117 // ----------------------------------------------------------------------------
 118 // initialization
 119 // ----------------------------------------------------------------------------
 120
 121 // the default initialization
 122 wxWindowBase::wxWindowBase()
 123 {
 124     // no window yet, no parent nor children
 125     m_parent = NULL;
 126     m_windowId = wxID_ANY;
 127
 128     // no constraints on the minimal window size
 129     m_minWidth =
 130     m_maxWidth = wxDefaultCoord;
 131     m_minHeight =
 132     m_maxHeight = wxDefaultCoord;
 133
 134     // invalidiated cache value
 135     m_bestSizeCache = wxDefaultSize;
 136
 137     // window are created enabled and visible by default
 138     m_isShown =
 139     m_isEnabled = true;
 140
 141     // the default event handler is just this window
 142     m_eventHandler = this;
 143
 144 #if wxUSE_VALIDATORS
 145     // no validator
 146     m_windowValidator = NULL;
 147 #endif // wxUSE_VALIDATORS
 148
 149     // the colours/fonts are default for now, so leave m_font,
 150     // m_backgroundColour and m_foregroundColour uninitialized and set those
 151     m_hasBgCol =
 152     m_hasFgCol =
 153     m_hasFont = false;
 154     m_inheritBgCol =
 155     m_inheritFgCol =
 156     m_inheritFont = false;
 157
 158     // no style bits
 159     m_exStyle =
 160     m_windowStyle = 0;
 161
 162     m_backgroundStyle = wxBG_STYLE_ERASE;
 163
 164 #if wxUSE_CONSTRAINTS
 165     // no constraints whatsoever
 166     m_constraints = NULL;
 167     m_constraintsInvolvedIn = NULL;
 168 #endif // wxUSE_CONSTRAINTS
 169
 170     m_windowSizer = NULL;
 171     m_containingSizer = NULL;
 172     m_autoLayout = false;
 173
 174 #if wxUSE_DRAG_AND_DROP
 175     m_dropTarget = NULL;
 176 #endif // wxUSE_DRAG_AND_DROP
 177
 178 #if wxUSE_TOOLTIPS
 179     m_tooltip = NULL;
 180 #endif // wxUSE_TOOLTIPS
 181
 182 #if wxUSE_CARET
 183     m_caret = NULL;
 184 #endif // wxUSE_CARET
 185
 186 #if wxUSE_PALETTE
 187     m_hasCustomPalette = false;
 188 #endif // wxUSE_PALETTE
 189
 190 #if wxUSE_ACCESSIBILITY
 191     m_accessible = NULL;
 192 #endif
 193
 194     m_virtualSize = wxDefaultSize;
 195
 196     m_scrollHelper = NULL;
 197
 198     m_windowVariant = wxWINDOW_VARIANT_NORMAL;
 199 #if wxUSE_SYSTEM_OPTIONS
 200     if ( wxSystemOptions::HasOption(wxWINDOW_DEFAULT_VARIANT) )
 201     {
 202        m_windowVariant = (wxWindowVariant) wxSystemOptions::GetOptionInt( wxWINDOW_DEFAULT_VARIANT ) ;
 203     }
 204 #endif
 205
 206     // Whether we're using the current theme for this window (wxGTK only for now)
 207     m_themeEnabled = false;
 208
 209     // This is set to true by SendDestroyEvent() which should be called by the
 210     // most derived class to ensure that the destruction event is sent as soon
 211     // as possible to allow its handlers to still see the undestroyed window
 212     m_isBeingDeleted = false;
 213
 214     m_freezeCount = 0;
 215 }
 216
 217 // common part of window creation process
 218 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 219                               wxWindowID id,
 220                               const wxPoint& WXUNUSED(pos),
 221                               const wxSize& size,
 222                               long style,
 223                               const wxString& name)
 224 {
 225     // ids are limited to 16 bits under MSW so if you care about portability,
 226     // it's not a good idea to use ids out of this range (and negative ids are
 227     // reserved for wxWidgets own usage)
 228     wxASSERT_MSG( id == wxID_ANY || (id >= 0 && id < 32767) ||
 229                   (id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST),
 230                   wxT("invalid id value") );
 231
 232     // generate a new id if the user doesn't care about it
 233     if ( id == wxID_ANY )
 234     {
 235         m_windowId = NewControlId();
 236     }
 237     else // valid id specified
 238     {
 239         m_windowId = id;
 240     }
 241
 242     // don't use SetWindowStyleFlag() here, this function should only be called
 243     // to change the flag after creation as it tries to reflect the changes in
 244     // flags by updating the window dynamically and we don't need this here
 245     m_windowStyle = style;
 246
 247     // assume the user doesn't want this window to shrink beneath its initial
 248     // size, this worked like this in wxWidgets 2.8 and before and generally
 249     // often makes sense for child windows (for top level ones it definitely
 250     // does not as the user should be able to resize the window)
 251     //
 252     // note that we can't use IsTopLevel() from ctor
 253     if ( size != wxDefaultSize && !wxTopLevelWindows.Find((wxWindow *)this) )
 254         SetMinSize(size);
 255
 256     SetName(name);
 257     SetParent(parent);
 258
 259     return true;
 260 }
 261
 262 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 263                               wxWindowID id,
 264                               const wxPoint& pos,
 265                               const wxSize& size,
 266                               long style,
 267                               const wxValidator& wxVALIDATOR_PARAM(validator),
 268                               const wxString& name)
 269 {
 270     if ( !CreateBase(parent, id, pos, size, style, name) )
 271         return false;
 272
 273 #if wxUSE_VALIDATORS
 274     SetValidator(validator);
 275 #endif // wxUSE_VALIDATORS
 276
 277     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 278     // have it too - like this it's possible to set it only in the top level
 279     // dialog/frame and all children will inherit it by defult
 280     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 281     {
 282         SetExtraStyle(GetExtraStyle() | wxWS_EX_VALIDATE_RECURSIVELY);
 283     }
 284
 285     return true;
 286 }
 287
 288 bool wxWindowBase::ToggleWindowStyle(int flag)
 289 {
 290     wxASSERT_MSG( flag, wxT("flags with 0 value can't be toggled") );
 291
 292     bool rc;
 293     long style = GetWindowStyleFlag();
 294     if ( style & flag )
 295     {
 296         style &= ~flag;
 297         rc = false;
 298     }
 299     else // currently off
 300     {
 301         style |= flag;
 302         rc = true;
 303     }
 304
 305     SetWindowStyleFlag(style);
 306
 307     return rc;
 308 }
 309
 310 // ----------------------------------------------------------------------------
 311 // destruction
 312 // ----------------------------------------------------------------------------
 313
 314 // common clean up
 315 wxWindowBase::~wxWindowBase()
 316 {
 317     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 318
 319     // FIXME if these 2 cases result from programming errors in the user code
 320     //       we should probably assert here instead of silently fixing them
 321
 322     // Just in case the window has been Closed, but we're then deleting
 323     // immediately: don't leave dangling pointers.
 324     wxPendingDelete.DeleteObject(this);
 325
 326     // Just in case we've loaded a top-level window via LoadNativeDialog but
 327     // we weren't a dialog class
 328     wxTopLevelWindows.DeleteObject((wxWindow*)this);
 329
 330     // Any additional event handlers should be popped before the window is
 331     // deleted as otherwise the last handler will be left with a dangling
 332     // pointer to this window result in a difficult to diagnose crash later on.
 333     wxASSERT_MSG( GetEventHandler() == this,
 334                     wxT("any pushed event handlers must have been removed") );
 335
 336 #if wxUSE_MENUS
 337     // The associated popup menu can still be alive, disassociate from it in
 338     // this case
 339     if ( wxCurrentPopupMenu && wxCurrentPopupMenu->GetInvokingWindow() == this )
 340         wxCurrentPopupMenu->SetInvokingWindow(NULL);
 341 #endif // wxUSE_MENUS
 342
 343     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 344
 345     // notify the parent about this window destruction
 346     if ( m_parent )
 347         m_parent->RemoveChild(this);
 348
 349 #if wxUSE_CARET
 350     delete m_caret;
 351 #endif // wxUSE_CARET
 352
 353 #if wxUSE_VALIDATORS
 354     delete m_windowValidator;
 355 #endif // wxUSE_VALIDATORS
 356
 357 #if wxUSE_CONSTRAINTS
 358     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 359     // at deleted windows as they delete themselves.
 360     DeleteRelatedConstraints();
 361
 362     if ( m_constraints )
 363     {
 364         // This removes any dangling pointers to this window in other windows'
 365         // constraintsInvolvedIn lists.
 366         UnsetConstraints(m_constraints);
 367         wxDELETE(m_constraints);
 368     }
 369 #endif // wxUSE_CONSTRAINTS
 370
 371     if ( m_containingSizer )
 372         m_containingSizer->Detach( (wxWindow*)this );
 373
 374     delete m_windowSizer;
 375
 376 #if wxUSE_DRAG_AND_DROP
 377     delete m_dropTarget;
 378 #endif // wxUSE_DRAG_AND_DROP
 379
 380 #if wxUSE_TOOLTIPS
 381     delete m_tooltip;
 382 #endif // wxUSE_TOOLTIPS
 383
 384 #if wxUSE_ACCESSIBILITY
 385     delete m_accessible;
 386 #endif
 387
 388 #if wxUSE_HELP
 389     // NB: this has to be called unconditionally, because we don't know
 390     //     whether this window has associated help text or not
 391     wxHelpProvider *helpProvider = wxHelpProvider::Get();
 392     if ( helpProvider )
 393         helpProvider->RemoveHelp(this);
 394 #endif
 395 }
 396
 397 bool wxWindowBase::IsBeingDeleted() const
 398 {
 399     return m_isBeingDeleted ||
 400             (!IsTopLevel() && m_parent && m_parent->IsBeingDeleted());
 401 }
 402
 403 void wxWindowBase::SendDestroyEvent()
 404 {
 405     if ( m_isBeingDeleted )
 406     {
 407         // we could have been already called from a more derived class dtor,
 408         // e.g. ~wxTLW calls us and so does ~wxWindow and the latter call
 409         // should be simply ignored
 410         return;
 411     }
 412
 413     m_isBeingDeleted = true;
 414
 415     wxWindowDestroyEvent event;
 416     event.SetEventObject(this);
 417     event.SetId(GetId());
 418     GetEventHandler()->ProcessEvent(event);
 419 }
 420
 421 bool wxWindowBase::Destroy()
 422 {
 423     SendDestroyEvent();
 424
 425     delete this;
 426
 427     return true;
 428 }
 429
 430 bool wxWindowBase::Close(bool force)
 431 {
 432     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 433     event.SetEventObject(this);
 434     event.SetCanVeto(!force);
 435
 436     // return false if window wasn't closed because the application vetoed the
 437     // close event
 438     return HandleWindowEvent(event) && !event.GetVeto();
 439 }
 440
 441 bool wxWindowBase::DestroyChildren()
 442 {
 443     wxWindowList::compatibility_iterator node;
 444     for ( ;; )
 445     {
 446         // we iterate until the list becomes empty
 447         node = GetChildren().GetFirst();
 448         if ( !node )
 449             break;
 450
 451         wxWindow *child = node->GetData();
 452
 453         // note that we really want to delete it immediately so don't call the
 454         // possible overridden Destroy() version which might not delete the
 455         // child immediately resulting in problems with our (top level) child
 456         // outliving its parent
 457         child->wxWindowBase::Destroy();
 458
 459         wxASSERT_MSG( !GetChildren().Find(child),
 460                       wxT("child didn't remove itself using RemoveChild()") );
 461     }
 462
 463     return true;
 464 }
 465
 466 // ----------------------------------------------------------------------------
 467 // size/position related methods
 468 // ----------------------------------------------------------------------------
 469
 470 // centre the window with respect to its parent in either (or both) directions
 471 void wxWindowBase::DoCentre(int dir)
 472 {
 473     wxCHECK_RET( !(dir & wxCENTRE_ON_SCREEN) && GetParent(),
 474                  wxT("this method only implements centering child windows") );
 475
 476     SetSize(GetRect().CentreIn(GetParent()->GetClientSize(), dir));
 477 }
 478
 479 // fits the window around the children
 480 void wxWindowBase::Fit()
 481 {
 482     if ( !GetChildren().empty() )
 483     {
 484         SetSize(GetBestSize());
 485     }
 486     //else: do nothing if we have no children
 487 }
 488
 489 // fits virtual size (ie. scrolled area etc.) around children
 490 void wxWindowBase::FitInside()
 491 {
 492     if ( GetChildren().GetCount() > 0 )
 493     {
 494         SetVirtualSize( GetBestVirtualSize() );
 495     }
 496 }
 497
 498 // On Mac, scrollbars are explicitly children.
 499 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 500 static bool wxHasRealChildren(const wxWindowBase* win)
 501 {
 502     int realChildCount = 0;
 503
 504     for ( wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 505           node;
 506           node = node->GetNext() )
 507     {
 508         wxWindow *win = node->GetData();
 509         if ( !win->IsTopLevel() && win->IsShown()
 510 #if wxUSE_SCROLLBAR
 511             && !win->IsKindOf(CLASSINFO(wxScrollBar))
 512 #endif
 513             )
 514             realChildCount ++;
 515     }
 516     return (realChildCount > 0);
 517 }
 518 #endif
 519
 520 void wxWindowBase::InvalidateBestSize()
 521 {
 522     m_bestSizeCache = wxDefaultSize;
 523
 524     // parent's best size calculation may depend on its children's
 525     // as long as child window we are in is not top level window itself
 526     // (because the TLW size is never resized automatically)
 527     // so let's invalidate it as well to be safe:
 528     if (m_parent && !IsTopLevel())
 529         m_parent->InvalidateBestSize();
 530 }
 531
 532 // return the size best suited for the current window
 533 wxSize wxWindowBase::DoGetBestSize() const
 534 {
 535     wxSize best;
 536
 537     if ( m_windowSizer )
 538     {
 539         best = m_windowSizer->GetMinSize();
 540     }
 541 #if wxUSE_CONSTRAINTS
 542     else if ( m_constraints )
 543     {
 544         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 545
 546         // our minimal acceptable size is such that all our windows fit inside
 547         int maxX = 0,
 548             maxY = 0;
 549
 550         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 551               node;
 552               node = node->GetNext() )
 553         {
 554             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 555             if ( !c )
 556             {
 557                 // it's not normal that we have an unconstrained child, but
 558                 // what can we do about it?
 559                 continue;
 560             }
 561
 562             int x = c->right.GetValue(),
 563                 y = c->bottom.GetValue();
 564
 565             if ( x > maxX )
 566                 maxX = x;
 567
 568             if ( y > maxY )
 569                 maxY = y;
 570
 571             // TODO: we must calculate the overlaps somehow, otherwise we
 572             //       will never return a size bigger than the current one :-(
 573         }
 574
 575         best = wxSize(maxX, maxY);
 576     }
 577 #endif // wxUSE_CONSTRAINTS
 578     else if ( !GetChildren().empty()
 579 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 580               && wxHasRealChildren(this)
 581 #endif
 582               )
 583     {
 584         // our minimal acceptable size is such that all our visible child
 585         // windows fit inside
 586         int maxX = 0,
 587             maxY = 0;
 588
 589         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 590               node;
 591               node = node->GetNext() )
 592         {
 593             wxWindow *win = node->GetData();
 594             if ( win->IsTopLevel()
 595                     || !win->IsShown()
 596 #if wxUSE_STATUSBAR
 597                         || wxDynamicCast(win, wxStatusBar)
 598 #endif // wxUSE_STATUSBAR
 599                )
 600             {
 601                 // dialogs and frames lie in different top level windows -
 602                 // don't deal with them here; as for the status bars, they
 603                 // don't lie in the client area at all
 604                 continue;
 605             }
 606
 607             int wx, wy, ww, wh;
 608             win->GetPosition(&wx, &wy);
 609
 610             // if the window hadn't been positioned yet, assume that it is in
 611             // the origin
 612             if ( wx == wxDefaultCoord )
 613                 wx = 0;
 614             if ( wy == wxDefaultCoord )
 615                 wy = 0;
 616
 617             win->GetSize(&ww, &wh);
 618             if ( wx + ww > maxX )
 619                 maxX = wx + ww;
 620             if ( wy + wh > maxY )
 621                 maxY = wy + wh;
 622         }
 623
 624         best = wxSize(maxX, maxY);
 625     }
 626     else // ! has children
 627     {
 628         wxSize size = GetMinSize();
 629         if ( !size.IsFullySpecified() )
 630         {
 631             // if the window doesn't define its best size we assume that it can
 632             // be arbitrarily small -- usually this is not the case, of course,
 633             // but we have no way to know what the limit is, it should really
 634             // override DoGetBestClientSize() itself to tell us
 635             size.SetDefaults(wxSize(1, 1));
 636         }
 637
 638         // return as-is, unadjusted by the client size difference.
 639         return size;
 640     }
 641
 642     // Add any difference between size and client size
 643     wxSize diff = GetSize() - GetClientSize();
 644     best.x += wxMax(0, diff.x);
 645     best.y += wxMax(0, diff.y);
 646
 647     return best;
 648 }
 649
 650 // helper of GetWindowBorderSize(): as many ports don't implement support for
 651 // wxSYS_BORDER/EDGE_X/Y metrics in their wxSystemSettings, use hard coded
 652 // fallbacks in this case
 653 static int wxGetMetricOrDefault(wxSystemMetric what, const wxWindowBase* win)
 654 {
 655     int rc = wxSystemSettings::GetMetric(
 656         what, static_cast<wxWindow*>(const_cast<wxWindowBase*>(win)));
 657     if ( rc == -1 )
 658     {
 659         switch ( what )
 660         {
 661             case wxSYS_BORDER_X:
 662             case wxSYS_BORDER_Y:
 663                 // 2D border is by default 1 pixel wide
 664                 rc = 1;
 665                 break;
 666
 667             case wxSYS_EDGE_X:
 668             case wxSYS_EDGE_Y:
 669                 // 3D borders are by default 2 pixels
 670                 rc = 2;
 671                 break;
 672
 673             default:
 674                 wxFAIL_MSG( wxT("unexpected wxGetMetricOrDefault() argument") );
 675                 rc = 0;
 676         }
 677     }
 678
 679     return rc;
 680 }
 681
 682 wxSize wxWindowBase::GetWindowBorderSize() const
 683 {
 684     wxSize size;
 685
 686     switch ( GetBorder() )
 687     {
 688         case wxBORDER_NONE:
 689             // nothing to do, size is already (0, 0)
 690             break;
 691
 692         case wxBORDER_SIMPLE:
 693         case wxBORDER_STATIC:
 694             size.x = wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 695             size.y = wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 696             break;
 697
 698         case wxBORDER_SUNKEN:
 699         case wxBORDER_RAISED:
 700             size.x = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_X, this),
 701                            wxGetMetricOrDefault(wxSYS_BORDER_X, this));
 702             size.y = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_Y, this),
 703                            wxGetMetricOrDefault(wxSYS_BORDER_Y, this));
 704             break;
 705
 706         case wxBORDER_DOUBLE:
 707             size.x = wxGetMetricOrDefault(wxSYS_EDGE_X, this) +
 708                         wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 709             size.y = wxGetMetricOrDefault(wxSYS_EDGE_Y, this) +
 710                         wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 711             break;
 712
 713         default:
 714             wxFAIL_MSG(wxT("Unknown border style."));
 715             break;
 716     }
 717
 718     // we have borders on both sides
 719     return size*2;
 720 }
 721
 722 wxSize wxWindowBase::GetEffectiveMinSize() const
 723 {
 724     // merge the best size with the min size, giving priority to the min size
 725     wxSize min = GetMinSize();
 726
 727     if (min.x == wxDefaultCoord || min.y == wxDefaultCoord)
 728     {
 729         wxSize best = GetBestSize();
 730         if (min.x == wxDefaultCoord) min.x =  best.x;
 731         if (min.y == wxDefaultCoord) min.y =  best.y;
 732     }
 733
 734     return min;
 735 }
 736
 737 wxSize wxWindowBase::DoGetBorderSize() const
 738 {
 739     // there is one case in which we can implement it for all ports easily
 740     if ( GetBorder() == wxBORDER_NONE )
 741         return wxSize(0, 0);
 742
 743     // otherwise use the difference between the real size and the client size
 744     // as a fallback: notice that this is incorrect in general as client size
 745     // also doesn't take the scrollbars into account
 746     return GetSize() - GetClientSize();
 747 }
 748
 749 wxSize wxWindowBase::GetBestSize() const
 750 {
 751     if ( !m_windowSizer && m_bestSizeCache.IsFullySpecified() )
 752         return m_bestSizeCache;
 753
 754     // call DoGetBestClientSize() first, if a derived class overrides it wants
 755     // it to be used
 756     wxSize size = DoGetBestClientSize();
 757     if ( size != wxDefaultSize )
 758     {
 759         size += DoGetBorderSize();
 760
 761         CacheBestSize(size);
 762         return size;
 763     }
 764
 765     return DoGetBestSize();
 766 }
 767
 768 void wxWindowBase::SetMinSize(const wxSize& minSize)
 769 {
 770     m_minWidth = minSize.x;
 771     m_minHeight = minSize.y;
 772 }
 773
 774 void wxWindowBase::SetMaxSize(const wxSize& maxSize)
 775 {
 776     m_maxWidth = maxSize.x;
 777     m_maxHeight = maxSize.y;
 778 }
 779
 780 void wxWindowBase::SetInitialSize(const wxSize& size)
 781 {
 782     // Set the min size to the size passed in.  This will usually either be
 783     // wxDefaultSize or the size passed to this window's ctor/Create function.
 784     SetMinSize(size);
 785
 786     // Merge the size with the best size if needed
 787     wxSize best = GetEffectiveMinSize();
 788
 789     // If the current size doesn't match then change it
 790     if (GetSize() != best)
 791         SetSize(best);
 792 }
 793
 794
 795 // by default the origin is not shifted
 796 wxPoint wxWindowBase::GetClientAreaOrigin() const
 797 {
 798     return wxPoint(0,0);
 799 }
 800
 801 wxSize wxWindowBase::ClientToWindowSize(const wxSize& size) const
 802 {
 803     const wxSize diff(GetSize() - GetClientSize());
 804
 805     return wxSize(size.x == -1 ? -1 : size.x + diff.x,
 806                   size.y == -1 ? -1 : size.y + diff.y);
 807 }
 808
 809 wxSize wxWindowBase::WindowToClientSize(const wxSize& size) const
 810 {
 811     const wxSize diff(GetSize() - GetClientSize());
 812
 813     return wxSize(size.x == -1 ? -1 : size.x - diff.x,
 814                   size.y == -1 ? -1 : size.y - diff.y);
 815 }
 816
 817 void wxWindowBase::SetWindowVariant( wxWindowVariant variant )
 818 {
 819     if ( m_windowVariant != variant )
 820     {
 821         m_windowVariant = variant;
 822
 823         DoSetWindowVariant(variant);
 824     }
 825 }
 826
 827 void wxWindowBase::DoSetWindowVariant( wxWindowVariant variant )
 828 {
 829     // adjust the font height to correspond to our new variant (notice that
 830     // we're only called if something really changed)
 831     wxFont font = GetFont();
 832     int size = font.GetPointSize();
 833     switch ( variant )
 834     {
 835         case wxWINDOW_VARIANT_NORMAL:
 836             break;
 837
 838         case wxWINDOW_VARIANT_SMALL:
 839             size = wxRound(size * 3.0 / 4.0);
 840             break;
 841
 842         case wxWINDOW_VARIANT_MINI:
 843             size = wxRound(size * 2.0 / 3.0);
 844             break;
 845
 846         case wxWINDOW_VARIANT_LARGE:
 847             size = wxRound(size * 5.0 / 4.0);
 848             break;
 849
 850         default:
 851             wxFAIL_MSG(wxT("unexpected window variant"));
 852             break;
 853     }
 854
 855     font.SetPointSize(size);
 856     SetFont(font);
 857 }
 858
 859 void wxWindowBase::DoSetSizeHints( int minW, int minH,
 860                                    int maxW, int maxH,
 861                                    int WXUNUSED(incW), int WXUNUSED(incH) )
 862 {
 863     wxCHECK_RET( (minW == wxDefaultCoord || maxW == wxDefaultCoord || minW <= maxW) &&
 864                     (minH == wxDefaultCoord || maxH == wxDefaultCoord || minH <= maxH),
 865                  wxT("min width/height must be less than max width/height!") );
 866
 867     m_minWidth = minW;
 868     m_maxWidth = maxW;
 869     m_minHeight = minH;
 870     m_maxHeight = maxH;
 871 }
 872
 873
 874 #if WXWIN_COMPATIBILITY_2_8
 875 void wxWindowBase::SetVirtualSizeHints(int WXUNUSED(minW), int WXUNUSED(minH),
 876                                        int WXUNUSED(maxW), int WXUNUSED(maxH))
 877 {
 878 }
 879
 880 void wxWindowBase::SetVirtualSizeHints(const wxSize& WXUNUSED(minsize),
 881                                        const wxSize& WXUNUSED(maxsize))
 882 {
 883 }
 884 #endif // WXWIN_COMPATIBILITY_2_8
 885
 886 void wxWindowBase::DoSetVirtualSize( int x, int y )
 887 {
 888     m_virtualSize = wxSize(x, y);
 889 }
 890
 891 wxSize wxWindowBase::DoGetVirtualSize() const
 892 {
 893     // we should use the entire client area so if it is greater than our
 894     // virtual size, expand it to fit (otherwise if the window is big enough we
 895     // wouldn't be using parts of it)
 896     wxSize size = GetClientSize();
 897     if ( m_virtualSize.x > size.x )
 898         size.x = m_virtualSize.x;
 899
 900     if ( m_virtualSize.y >= size.y )
 901         size.y = m_virtualSize.y;
 902
 903     return size;
 904 }
 905
 906 void wxWindowBase::DoGetScreenPosition(int *x, int *y) const
 907 {
 908     // screen position is the same as (0, 0) in client coords for non TLWs (and
 909     // TLWs override this method)
 910     if ( x )
 911         *x = 0;
 912     if ( y )
 913         *y = 0;
 914
 915     ClientToScreen(x, y);
 916 }
 917
 918 void wxWindowBase::SendSizeEvent(int flags)
 919 {
 920     wxSizeEvent event(GetSize(), GetId());
 921     event.SetEventObject(this);
 922     if ( flags & wxSEND_EVENT_POST )
 923         wxPostEvent(this, event);
 924     else
 925         HandleWindowEvent(event);
 926 }
 927
 928 void wxWindowBase::SendSizeEventToParent(int flags)
 929 {
 930     wxWindow * const parent = GetParent();
 931     if ( parent && !parent->IsBeingDeleted() )
 932         parent->SendSizeEvent(flags);
 933 }
 934
 935 bool wxWindowBase::HasScrollbar(int orient) const
 936 {
 937     // if scrolling in the given direction is disabled, we can't have the
 938     // corresponding scrollbar no matter what
 939     if ( !CanScroll(orient) )
 940         return false;
 941
 942     const wxSize sizeVirt = GetVirtualSize();
 943     const wxSize sizeClient = GetClientSize();
 944
 945     return orient == wxHORIZONTAL ? sizeVirt.x > sizeClient.x
 946                                   : sizeVirt.y > sizeClient.y;
 947 }
 948
 949 // ----------------------------------------------------------------------------
 950 // show/hide/enable/disable the window
 951 // ----------------------------------------------------------------------------
 952
 953 bool wxWindowBase::Show(bool show)
 954 {
 955     if ( show != m_isShown )
 956     {
 957         m_isShown = show;
 958
 959         return true;
 960     }
 961     else
 962     {
 963         return false;
 964     }
 965 }
 966
 967 bool wxWindowBase::IsEnabled() const
 968 {
 969     return IsThisEnabled() && (IsTopLevel() || !GetParent() || GetParent()->IsEnabled());
 970 }
 971
 972 void wxWindowBase::NotifyWindowOnEnableChange(bool enabled)
 973 {
 974     // Under some platforms there is no need to update the window state
 975     // explicitly, it will become disabled when its parent is. On other ones we
 976     // do need to disable all windows recursively though.
 977 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
 978     DoEnable(enabled);
 979 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 980
 981     OnEnabled(enabled);
 982
 983     // Disabling a top level window is typically done when showing a modal
 984     // dialog and we don't need to disable its children in this case, they will
 985     // be logically disabled anyhow (i.e. their IsEnabled() will return false)
 986     // and the TLW won't accept any input for them. Moreover, explicitly
 987     // disabling them would look ugly as the entire TLW would be greyed out
 988     // whenever a modal dialog is shown and no native applications under any
 989     // platform behave like this.
 990     if ( IsTopLevel() && !enabled )
 991         return;
 992
 993     // When disabling (or enabling back) a non-TLW window we need to
 994     // recursively propagate the change of the state to its children, otherwise
 995     // they would still show as enabled even though they wouldn't actually
 996     // accept any input (at least under MSW where children don't accept input
 997     // if any of the windows in their parent chain is enabled).
 998     //
 999     // Notice that we must do this even for wxHAS_NATIVE_ENABLED_MANAGEMENT
1000     // platforms as we still need to call the children OnEnabled() recursively.
1001     for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1002           node;
1003           node = node->GetNext() )
1004     {
1005         wxWindowBase * const child = node->GetData();
1006         if ( !child->IsTopLevel() && child->IsThisEnabled() )
1007             child->NotifyWindowOnEnableChange(enabled);
1008     }
1009 }
1010
1011 bool wxWindowBase::Enable(bool enable)
1012 {
1013     if ( enable == IsThisEnabled() )
1014         return false;
1015
1016     m_isEnabled = enable;
1017
1018     // If we call DoEnable() from NotifyWindowOnEnableChange(), we don't need
1019     // to do it from here.
1020 #ifdef wxHAS_NATIVE_ENABLED_MANAGEMENT
1021     DoEnable(enable);
1022 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
1023
1024     NotifyWindowOnEnableChange(enable);
1025
1026     return true;
1027 }
1028
1029 bool wxWindowBase::IsShownOnScreen() const
1030 {
1031     // A window is shown on screen if it itself is shown and so are all its
1032     // parents. But if a window is toplevel one, then its always visible on
1033     // screen if IsShown() returns true, even if it has a hidden parent.
1034     return IsShown() &&
1035            (IsTopLevel() || GetParent() == NULL || GetParent()->IsShownOnScreen());
1036 }
1037
1038 // ----------------------------------------------------------------------------
1039 // RTTI
1040 // ----------------------------------------------------------------------------
1041
1042 bool wxWindowBase::IsTopLevel() const
1043 {
1044     return false;
1045 }
1046
1047 // ----------------------------------------------------------------------------
1048 // Freeze/Thaw
1049 // ----------------------------------------------------------------------------
1050
1051 void wxWindowBase::Freeze()
1052 {
1053     if ( !m_freezeCount++ )
1054     {
1055         // physically freeze this window:
1056         DoFreeze();
1057
1058         // and recursively freeze all children:
1059         for ( wxWindowList::iterator i = GetChildren().begin();
1060               i != GetChildren().end(); ++i )
1061         {
1062             wxWindow *child = *i;
1063             if ( child->IsTopLevel() )
1064                 continue;
1065
1066             child->Freeze();
1067         }
1068     }
1069 }
1070
1071 void wxWindowBase::Thaw()
1072 {
1073     wxASSERT_MSG( m_freezeCount, "Thaw() without matching Freeze()" );
1074
1075     if ( !--m_freezeCount )
1076     {
1077         // recursively thaw all children:
1078         for ( wxWindowList::iterator i = GetChildren().begin();
1079               i != GetChildren().end(); ++i )
1080         {
1081             wxWindow *child = *i;
1082             if ( child->IsTopLevel() )
1083                 continue;
1084
1085             child->Thaw();
1086         }
1087
1088         // physically thaw this window:
1089         DoThaw();
1090     }
1091 }
1092
1093 // ----------------------------------------------------------------------------
1094 // reparenting the window
1095 // ----------------------------------------------------------------------------
1096
1097 void wxWindowBase::AddChild(wxWindowBase *child)
1098 {
1099     wxCHECK_RET( child, wxT("can't add a NULL child") );
1100
1101     // this should never happen and it will lead to a crash later if it does
1102     // because RemoveChild() will remove only one node from the children list
1103     // and the other(s) one(s) will be left with dangling pointers in them
1104     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), wxT("AddChild() called twice") );
1105
1106     GetChildren().Append((wxWindow*)child);
1107     child->SetParent(this);
1108
1109     // adding a child while frozen will assert when thawed, so freeze it as if
1110     // it had been already present when we were frozen
1111     if ( IsFrozen() && !child->IsTopLevel() )
1112         child->Freeze();
1113 }
1114
1115 void wxWindowBase::RemoveChild(wxWindowBase *child)
1116 {
1117     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1118
1119     // removing a child while frozen may result in permanently frozen window
1120     // if used e.g. from Reparent(), so thaw it
1121     //
1122     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1123     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1124     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1125         child->Thaw();
1126
1127     GetChildren().DeleteObject((wxWindow *)child);
1128     child->SetParent(NULL);
1129 }
1130
1131 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1132 {
1133     wxWindow *oldParent = GetParent();
1134     if ( newParent == oldParent )
1135     {
1136         // nothing done
1137         return false;
1138     }
1139
1140     const bool oldEnabledState = IsEnabled();
1141
1142     // unlink this window from the existing parent.
1143     if ( oldParent )
1144     {
1145         oldParent->RemoveChild(this);
1146     }
1147     else
1148     {
1149         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1150     }
1151
1152     // add it to the new one
1153     if ( newParent )
1154     {
1155         newParent->AddChild(this);
1156     }
1157     else
1158     {
1159         wxTopLevelWindows.Append((wxWindow *)this);
1160     }
1161
1162     // We need to notify window (and its subwindows) if by changing the parent
1163     // we also change our enabled/disabled status.
1164     const bool newEnabledState = IsEnabled();
1165     if ( newEnabledState != oldEnabledState )
1166     {
1167         NotifyWindowOnEnableChange(newEnabledState);
1168     }
1169
1170     return true;
1171 }
1172
1173 // ----------------------------------------------------------------------------
1174 // event handler stuff
1175 // ----------------------------------------------------------------------------
1176
1177 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1178 {
1179     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1180
1181     m_eventHandler = handler;
1182 }
1183
1184 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1185 {
1186     // disable wxEvtHandler chain mechanism for wxWindows:
1187     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1188
1189     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1190 }
1191 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1192 {
1193     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1194     // handler of our stack when is destroyed will be Unlink()ed and thus
1195     // will call this function to update the pointer of this window...
1196
1197     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1198 }
1199
1200 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1201 {
1202     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1203
1204     // the new handler is going to be part of the wxWindow stack of event handlers:
1205     // it can't be part also of an event handler double-linked chain:
1206     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1207         "The handler being pushed in the wxWindow stack shouldn't be part of "
1208         "a wxEvtHandler chain; call Unlink() on it first");
1209
1210     wxEvtHandler *handlerOld = GetEventHandler();
1211     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1212
1213     // now use wxEvtHandler double-linked list to implement a stack:
1214     handlerToPush->SetNextHandler(handlerOld);
1215
1216     if (handlerOld != this)
1217         handlerOld->SetPreviousHandler(handlerToPush);
1218
1219     SetEventHandler(handlerToPush);
1220
1221 #if wxDEBUG_LEVEL
1222     // final checks of the operations done above:
1223     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1224         "the first handler of the wxWindow stack should "
1225         "have no previous handlers set" );
1226     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1227         "the first handler of the wxWindow stack should "
1228         "have non-NULL next handler" );
1229
1230     wxEvtHandler* pLast = handlerToPush;
1231     while ( pLast && pLast != this )
1232         pLast = pLast->GetNextHandler();
1233     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1234         "the last handler of the wxWindow stack should "
1235         "have this window as next handler" );
1236 #endif // wxDEBUG_LEVEL
1237 }
1238
1239 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1240 {
1241     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1242
1243     wxEvtHandler *firstHandler = GetEventHandler();
1244     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1245     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1246     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1247         "the first handler of the wxWindow stack should have no previous handlers set" );
1248
1249     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1250     wxCHECK_MSG( secondHandler != NULL, NULL,
1251         "the first handler of the wxWindow stack should have non-NULL next handler" );
1252
1253     firstHandler->SetNextHandler(NULL);
1254     secondHandler->SetPreviousHandler(NULL);
1255
1256     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1257     SetEventHandler(secondHandler);
1258
1259     if ( deleteHandler )
1260     {
1261         wxDELETE(firstHandler);
1262     }
1263
1264     return firstHandler;
1265 }
1266
1267 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1268 {
1269     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1270     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1271
1272     if (handlerToRemove == GetEventHandler())
1273     {
1274         // removing the first event handler is equivalent to "popping" the stack
1275         PopEventHandler(false);
1276         return true;
1277     }
1278
1279     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1280     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1281     while ( handlerCur != this && handlerCur )
1282     {
1283         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1284
1285         if ( handlerCur == handlerToRemove )
1286         {
1287             handlerCur->Unlink();
1288
1289             wxASSERT_MSG( handlerCur != GetEventHandler(),
1290                         "the case Remove == Pop should was already handled" );
1291             return true;
1292         }
1293
1294         handlerCur = handlerNext;
1295     }
1296
1297     wxFAIL_MSG( wxT("where has the event handler gone?") );
1298
1299     return false;
1300 }
1301
1302 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1303 {
1304     // SafelyProcessEvent() will handle exceptions nicely
1305     return GetEventHandler()->SafelyProcessEvent(event);
1306 }
1307
1308 // ----------------------------------------------------------------------------
1309 // colours, fonts &c
1310 // ----------------------------------------------------------------------------
1311
1312 void wxWindowBase::InheritAttributes()
1313 {
1314     const wxWindowBase * const parent = GetParent();
1315     if ( !parent )
1316         return;
1317
1318     // we only inherit attributes which had been explicitly set for the parent
1319     // which ensures that this only happens if the user really wants it and
1320     // not by default which wouldn't make any sense in modern GUIs where the
1321     // controls don't all use the same fonts (nor colours)
1322     if ( parent->m_inheritFont && !m_hasFont )
1323         SetFont(parent->GetFont());
1324
1325     // in addition, there is a possibility to explicitly forbid inheriting
1326     // colours at each class level by overriding ShouldInheritColours()
1327     if ( ShouldInheritColours() )
1328     {
1329         if ( parent->m_inheritFgCol && !m_hasFgCol )
1330             SetForegroundColour(parent->GetForegroundColour());
1331
1332         // inheriting (solid) background colour is wrong as it totally breaks
1333         // any kind of themed backgrounds
1334         //
1335         // instead, the controls should use the same background as their parent
1336         // (ideally by not drawing it at all)
1337 #if 0
1338         if ( parent->m_inheritBgCol && !m_hasBgCol )
1339             SetBackgroundColour(parent->GetBackgroundColour());
1340 #endif // 0
1341     }
1342 }
1343
1344 /* static */ wxVisualAttributes
1345 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1346 {
1347     // it is important to return valid values for all attributes from here,
1348     // GetXXX() below rely on this
1349     wxVisualAttributes attrs;
1350     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1351     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1352
1353     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1354     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1355     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1356     // colour on other platforms.
1357
1358 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1359     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1360 #else
1361     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1362 #endif
1363     return attrs;
1364 }
1365
1366 wxColour wxWindowBase::GetBackgroundColour() const
1367 {
1368     if ( !m_backgroundColour.IsOk() )
1369     {
1370         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1371
1372         // get our default background colour
1373         wxColour colBg = GetDefaultAttributes().colBg;
1374
1375         // we must return some valid colour to avoid redoing this every time
1376         // and also to avoid surprising the applications written for older
1377         // wxWidgets versions where GetBackgroundColour() always returned
1378         // something -- so give them something even if it doesn't make sense
1379         // for this window (e.g. it has a themed background)
1380         if ( !colBg.Ok() )
1381             colBg = GetClassDefaultAttributes().colBg;
1382
1383         return colBg;
1384     }
1385     else
1386         return m_backgroundColour;
1387 }
1388
1389 wxColour wxWindowBase::GetForegroundColour() const
1390 {
1391     // logic is the same as above
1392     if ( !m_hasFgCol && !m_foregroundColour.Ok() )
1393     {
1394         wxColour colFg = GetDefaultAttributes().colFg;
1395
1396         if ( !colFg.IsOk() )
1397             colFg = GetClassDefaultAttributes().colFg;
1398
1399         return colFg;
1400     }
1401     else
1402         return m_foregroundColour;
1403 }
1404
1405 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1406 {
1407     if ( colour == m_backgroundColour )
1408         return false;
1409
1410     m_hasBgCol = colour.IsOk();
1411
1412     m_inheritBgCol = m_hasBgCol;
1413     m_backgroundColour = colour;
1414     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.Ok() );
1415     return true;
1416 }
1417
1418 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1419 {
1420     if (colour == m_foregroundColour )
1421         return false;
1422
1423     m_hasFgCol = colour.IsOk();
1424     m_inheritFgCol = m_hasFgCol;
1425     m_foregroundColour = colour;
1426     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.Ok() );
1427     return true;
1428 }
1429
1430 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1431 {
1432     // setting an invalid cursor is ok, it means that we don't have any special
1433     // cursor
1434     if ( m_cursor.IsSameAs(cursor) )
1435     {
1436         // no change
1437         return false;
1438     }
1439
1440     m_cursor = cursor;
1441
1442     return true;
1443 }
1444
1445 wxFont wxWindowBase::GetFont() const
1446 {
1447     // logic is the same as in GetBackgroundColour()
1448     if ( !m_font.IsOk() )
1449     {
1450         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1451
1452         wxFont font = GetDefaultAttributes().font;
1453         if ( !font.IsOk() )
1454             font = GetClassDefaultAttributes().font;
1455
1456         return font;
1457     }
1458     else
1459         return m_font;
1460 }
1461
1462 bool wxWindowBase::SetFont(const wxFont& font)
1463 {
1464     if ( font == m_font )
1465     {
1466         // no change
1467         return false;
1468     }
1469
1470     m_font = font;
1471     m_hasFont = font.IsOk();
1472     m_inheritFont = m_hasFont;
1473
1474     InvalidateBestSize();
1475
1476     return true;
1477 }
1478
1479 #if wxUSE_PALETTE
1480
1481 void wxWindowBase::SetPalette(const wxPalette& pal)
1482 {
1483     m_hasCustomPalette = true;
1484     m_palette = pal;
1485
1486     // VZ: can anyone explain me what do we do here?
1487     wxWindowDC d((wxWindow *) this);
1488     d.SetPalette(pal);
1489 }
1490
1491 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1492 {
1493     wxWindow *win = (wxWindow *)this;
1494     while ( win && !win->HasCustomPalette() )
1495     {
1496         win = win->GetParent();
1497     }
1498
1499     return win;
1500 }
1501
1502 #endif // wxUSE_PALETTE
1503
1504 #if wxUSE_CARET
1505 void wxWindowBase::SetCaret(wxCaret *caret)
1506 {
1507     if ( m_caret )
1508     {
1509         delete m_caret;
1510     }
1511
1512     m_caret = caret;
1513
1514     if ( m_caret )
1515     {
1516         wxASSERT_MSG( m_caret->GetWindow() == this,
1517                       wxT("caret should be created associated to this window") );
1518     }
1519 }
1520 #endif // wxUSE_CARET
1521
1522 #if wxUSE_VALIDATORS
1523 // ----------------------------------------------------------------------------
1524 // validators
1525 // ----------------------------------------------------------------------------
1526
1527 void wxWindowBase::SetValidator(const wxValidator& validator)
1528 {
1529     if ( m_windowValidator )
1530         delete m_windowValidator;
1531
1532     m_windowValidator = (wxValidator *)validator.Clone();
1533
1534     if ( m_windowValidator )
1535         m_windowValidator->SetWindow(this);
1536 }
1537 #endif // wxUSE_VALIDATORS
1538
1539 // ----------------------------------------------------------------------------
1540 // update region stuff
1541 // ----------------------------------------------------------------------------
1542
1543 wxRect wxWindowBase::GetUpdateClientRect() const
1544 {
1545     wxRegion rgnUpdate = GetUpdateRegion();
1546     rgnUpdate.Intersect(GetClientRect());
1547     wxRect rectUpdate = rgnUpdate.GetBox();
1548     wxPoint ptOrigin = GetClientAreaOrigin();
1549     rectUpdate.x -= ptOrigin.x;
1550     rectUpdate.y -= ptOrigin.y;
1551
1552     return rectUpdate;
1553 }
1554
1555 bool wxWindowBase::DoIsExposed(int x, int y) const
1556 {
1557     return m_updateRegion.Contains(x, y) != wxOutRegion;
1558 }
1559
1560 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1561 {
1562     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1563 }
1564
1565 void wxWindowBase::ClearBackground()
1566 {
1567     // wxGTK uses its own version, no need to add never used code
1568 #ifndef __WXGTK__
1569     wxClientDC dc((wxWindow *)this);
1570     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1571     dc.SetBackground(brush);
1572     dc.Clear();
1573 #endif // __WXGTK__
1574 }
1575
1576 // ----------------------------------------------------------------------------
1577 // find child window by id or name
1578 // ----------------------------------------------------------------------------
1579
1580 wxWindow *wxWindowBase::FindWindow(long id) const
1581 {
1582     if ( id == m_windowId )
1583         return (wxWindow *)this;
1584
1585     wxWindowBase *res = NULL;
1586     wxWindowList::compatibility_iterator node;
1587     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1588     {
1589         wxWindowBase *child = node->GetData();
1590         res = child->FindWindow( id );
1591     }
1592
1593     return (wxWindow *)res;
1594 }
1595
1596 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1597 {
1598     if ( name == m_windowName )
1599         return (wxWindow *)this;
1600
1601     wxWindowBase *res = NULL;
1602     wxWindowList::compatibility_iterator node;
1603     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1604     {
1605         wxWindow *child = node->GetData();
1606         res = child->FindWindow(name);
1607     }
1608
1609     return (wxWindow *)res;
1610 }
1611
1612
1613 // find any window by id or name or label: If parent is non-NULL, look through
1614 // children for a label or title matching the specified string. If NULL, look
1615 // through all top-level windows.
1616 //
1617 // to avoid duplicating code we reuse the same helper function but with
1618 // different comparators
1619
1620 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1621                                 const wxString& label, long id);
1622
1623 static
1624 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1625                            long WXUNUSED(id))
1626 {
1627     return win->GetLabel() == label;
1628 }
1629
1630 static
1631 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1632                           long WXUNUSED(id))
1633 {
1634     return win->GetName() == label;
1635 }
1636
1637 static
1638 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1639                         long id)
1640 {
1641     return win->GetId() == id;
1642 }
1643
1644 // recursive helper for the FindWindowByXXX() functions
1645 static
1646 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1647                                   const wxString& label,
1648                                   long id,
1649                                   wxFindWindowCmp cmp)
1650 {
1651     if ( parent )
1652     {
1653         // see if this is the one we're looking for
1654         if ( (*cmp)(parent, label, id) )
1655             return (wxWindow *)parent;
1656
1657         // It wasn't, so check all its children
1658         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1659               node;
1660               node = node->GetNext() )
1661         {
1662             // recursively check each child
1663             wxWindow *win = (wxWindow *)node->GetData();
1664             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1665             if (retwin)
1666                 return retwin;
1667         }
1668     }
1669
1670     // Not found
1671     return NULL;
1672 }
1673
1674 // helper for FindWindowByXXX()
1675 static
1676 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1677                              const wxString& label,
1678                              long id,
1679                              wxFindWindowCmp cmp)
1680 {
1681     if ( parent )
1682     {
1683         // just check parent and all its children
1684         return wxFindWindowRecursively(parent, label, id, cmp);
1685     }
1686
1687     // start at very top of wx's windows
1688     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1689           node;
1690           node = node->GetNext() )
1691     {
1692         // recursively check each window & its children
1693         wxWindow *win = node->GetData();
1694         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1695         if (retwin)
1696             return retwin;
1697     }
1698
1699     return NULL;
1700 }
1701
1702 /* static */
1703 wxWindow *
1704 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1705 {
1706     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1707 }
1708
1709 /* static */
1710 wxWindow *
1711 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1712 {
1713     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1714
1715     if ( !win )
1716     {
1717         // fall back to the label
1718         win = FindWindowByLabel(title, parent);
1719     }
1720
1721     return win;
1722 }
1723
1724 /* static */
1725 wxWindow *
1726 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1727 {
1728     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1729 }
1730
1731 // ----------------------------------------------------------------------------
1732 // dialog oriented functions
1733 // ----------------------------------------------------------------------------
1734
1735 void wxWindowBase::MakeModal(bool modal)
1736 {
1737     // Disable all other windows
1738     if ( IsTopLevel() )
1739     {
1740         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1741         while (node)
1742         {
1743             wxWindow *win = node->GetData();
1744             if (win != this)
1745                 win->Enable(!modal);
1746
1747             node = node->GetNext();
1748         }
1749     }
1750 }
1751
1752 bool wxWindowBase::Validate()
1753 {
1754 #if wxUSE_VALIDATORS
1755     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1756
1757     wxWindowList::compatibility_iterator node;
1758     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1759     {
1760         wxWindowBase *child = node->GetData();
1761         wxValidator *validator = child->GetValidator();
1762         if ( validator && !validator->Validate((wxWindow *)this) )
1763         {
1764             return false;
1765         }
1766
1767         if ( recurse && !child->Validate() )
1768         {
1769             return false;
1770         }
1771     }
1772 #endif // wxUSE_VALIDATORS
1773
1774     return true;
1775 }
1776
1777 bool wxWindowBase::TransferDataToWindow()
1778 {
1779 #if wxUSE_VALIDATORS
1780     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1781
1782     wxWindowList::compatibility_iterator node;
1783     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1784     {
1785         wxWindowBase *child = node->GetData();
1786         wxValidator *validator = child->GetValidator();
1787         if ( validator && !validator->TransferToWindow() )
1788         {
1789             wxLogWarning(_("Could not transfer data to window"));
1790 #if wxUSE_LOG
1791             wxLog::FlushActive();
1792 #endif // wxUSE_LOG
1793
1794             return false;
1795         }
1796
1797         if ( recurse )
1798         {
1799             if ( !child->TransferDataToWindow() )
1800             {
1801                 // warning already given
1802                 return false;
1803             }
1804         }
1805     }
1806 #endif // wxUSE_VALIDATORS
1807
1808     return true;
1809 }
1810
1811 bool wxWindowBase::TransferDataFromWindow()
1812 {
1813 #if wxUSE_VALIDATORS
1814     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1815
1816     wxWindowList::compatibility_iterator node;
1817     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1818     {
1819         wxWindow *child = node->GetData();
1820         wxValidator *validator = child->GetValidator();
1821         if ( validator && !validator->TransferFromWindow() )
1822         {
1823             // nop warning here because the application is supposed to give
1824             // one itself - we don't know here what might have gone wrongly
1825
1826             return false;
1827         }
1828
1829         if ( recurse )
1830         {
1831             if ( !child->TransferDataFromWindow() )
1832             {
1833                 // warning already given
1834                 return false;
1835             }
1836         }
1837     }
1838 #endif // wxUSE_VALIDATORS
1839
1840     return true;
1841 }
1842
1843 void wxWindowBase::InitDialog()
1844 {
1845     wxInitDialogEvent event(GetId());
1846     event.SetEventObject( this );
1847     GetEventHandler()->ProcessEvent(event);
1848 }
1849
1850 // ----------------------------------------------------------------------------
1851 // context-sensitive help support
1852 // ----------------------------------------------------------------------------
1853
1854 #if wxUSE_HELP
1855
1856 // associate this help text with this window
1857 void wxWindowBase::SetHelpText(const wxString& text)
1858 {
1859     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1860     if ( helpProvider )
1861     {
1862         helpProvider->AddHelp(this, text);
1863     }
1864 }
1865
1866 #if WXWIN_COMPATIBILITY_2_8
1867 // associate this help text with all windows with the same id as this
1868 // one
1869 void wxWindowBase::SetHelpTextForId(const wxString& text)
1870 {
1871     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1872     if ( helpProvider )
1873     {
1874         helpProvider->AddHelp(GetId(), text);
1875     }
1876 }
1877 #endif // WXWIN_COMPATIBILITY_2_8
1878
1879 // get the help string associated with this window (may be empty)
1880 // default implementation forwards calls to the help provider
1881 wxString
1882 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
1883                                  wxHelpEvent::Origin WXUNUSED(origin)) const
1884 {
1885     wxString text;
1886     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1887     if ( helpProvider )
1888     {
1889         text = helpProvider->GetHelp(this);
1890     }
1891
1892     return text;
1893 }
1894
1895 // show help for this window
1896 void wxWindowBase::OnHelp(wxHelpEvent& event)
1897 {
1898     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1899     if ( helpProvider )
1900     {
1901         wxPoint pos = event.GetPosition();
1902         const wxHelpEvent::Origin origin = event.GetOrigin();
1903         if ( origin == wxHelpEvent::Origin_Keyboard )
1904         {
1905             // if the help event was generated from keyboard it shouldn't
1906             // appear at the mouse position (which is still the only position
1907             // associated with help event) if the mouse is far away, although
1908             // we still do use the mouse position if it's over the window
1909             // because we suppose the user looks approximately at the mouse
1910             // already and so it would be more convenient than showing tooltip
1911             // at some arbitrary position which can be quite far from it
1912             const wxRect rectClient = GetClientRect();
1913             if ( !rectClient.Contains(ScreenToClient(pos)) )
1914             {
1915                 // position help slightly under and to the right of this window
1916                 pos = ClientToScreen(wxPoint(
1917                         2*GetCharWidth(),
1918                         rectClient.height + GetCharHeight()
1919                       ));
1920             }
1921         }
1922
1923         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
1924         {
1925             // skip the event.Skip() below
1926             return;
1927         }
1928     }
1929
1930     event.Skip();
1931 }
1932
1933 #endif // wxUSE_HELP
1934
1935 // ----------------------------------------------------------------------------
1936 // tooltips
1937 // ----------------------------------------------------------------------------
1938
1939 #if wxUSE_TOOLTIPS
1940
1941 wxString wxWindowBase::GetToolTipText() const
1942 {
1943     return m_tooltip ? m_tooltip->GetTip() : wxString();
1944 }
1945
1946 void wxWindowBase::SetToolTip( const wxString &tip )
1947 {
1948     // don't create the new tooltip if we already have one
1949     if ( m_tooltip )
1950     {
1951         m_tooltip->SetTip( tip );
1952     }
1953     else
1954     {
1955         SetToolTip( new wxToolTip( tip ) );
1956     }
1957
1958     // setting empty tooltip text does not remove the tooltip any more - use
1959     // SetToolTip(NULL) for this
1960 }
1961
1962 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
1963 {
1964     if ( m_tooltip != tooltip )
1965     {
1966         if ( m_tooltip )
1967             delete m_tooltip;
1968
1969         m_tooltip = tooltip;
1970     }
1971 }
1972
1973 #endif // wxUSE_TOOLTIPS
1974
1975 // ----------------------------------------------------------------------------
1976 // constraints and sizers
1977 // ----------------------------------------------------------------------------
1978
1979 #if wxUSE_CONSTRAINTS
1980
1981 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
1982 {
1983     if ( m_constraints )
1984     {
1985         UnsetConstraints(m_constraints);
1986         delete m_constraints;
1987     }
1988     m_constraints = constraints;
1989     if ( m_constraints )
1990     {
1991         // Make sure other windows know they're part of a 'meaningful relationship'
1992         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
1993             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
1994         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
1995             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
1996         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
1997             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
1998         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
1999             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
2000         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
2001             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
2002         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
2003             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
2004         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
2005             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
2006         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
2007             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
2008     }
2009 }
2010
2011 // This removes any dangling pointers to this window in other windows'
2012 // constraintsInvolvedIn lists.
2013 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
2014 {
2015     if ( c )
2016     {
2017         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2018             c->left.GetOtherWindow()->RemoveConstraintReference(this);
2019         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2020             c->top.GetOtherWindow()->RemoveConstraintReference(this);
2021         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
2022             c->right.GetOtherWindow()->RemoveConstraintReference(this);
2023         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
2024             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
2025         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
2026             c->width.GetOtherWindow()->RemoveConstraintReference(this);
2027         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
2028             c->height.GetOtherWindow()->RemoveConstraintReference(this);
2029         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
2030             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
2031         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
2032             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
2033     }
2034 }
2035
2036 // Back-pointer to other windows we're involved with, so if we delete this
2037 // window, we must delete any constraints we're involved with.
2038 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
2039 {
2040     if ( !m_constraintsInvolvedIn )
2041         m_constraintsInvolvedIn = new wxWindowList;
2042     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
2043         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
2044 }
2045
2046 // REMOVE back-pointer to other windows we're involved with.
2047 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
2048 {
2049     if ( m_constraintsInvolvedIn )
2050         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
2051 }
2052
2053 // Reset any constraints that mention this window
2054 void wxWindowBase::DeleteRelatedConstraints()
2055 {
2056     if ( m_constraintsInvolvedIn )
2057     {
2058         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
2059         while (node)
2060         {
2061             wxWindow *win = node->GetData();
2062             wxLayoutConstraints *constr = win->GetConstraints();
2063
2064             // Reset any constraints involving this window
2065             if ( constr )
2066             {
2067                 constr->left.ResetIfWin(this);
2068                 constr->top.ResetIfWin(this);
2069                 constr->right.ResetIfWin(this);
2070                 constr->bottom.ResetIfWin(this);
2071                 constr->width.ResetIfWin(this);
2072                 constr->height.ResetIfWin(this);
2073                 constr->centreX.ResetIfWin(this);
2074                 constr->centreY.ResetIfWin(this);
2075             }
2076
2077             wxWindowList::compatibility_iterator next = node->GetNext();
2078             m_constraintsInvolvedIn->Erase(node);
2079             node = next;
2080         }
2081
2082         wxDELETE(m_constraintsInvolvedIn);
2083     }
2084 }
2085
2086 #endif // wxUSE_CONSTRAINTS
2087
2088 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2089 {
2090     if ( sizer == m_windowSizer)
2091         return;
2092
2093     if ( m_windowSizer )
2094     {
2095         m_windowSizer->SetContainingWindow(NULL);
2096
2097         if ( deleteOld )
2098             delete m_windowSizer;
2099     }
2100
2101     m_windowSizer = sizer;
2102     if ( m_windowSizer )
2103     {
2104         m_windowSizer->SetContainingWindow((wxWindow *)this);
2105     }
2106
2107     SetAutoLayout(m_windowSizer != NULL);
2108 }
2109
2110 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2111 {
2112     SetSizer( sizer, deleteOld );
2113     sizer->SetSizeHints( (wxWindow*) this );
2114 }
2115
2116
2117 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2118 {
2119     // adding a window to a sizer twice is going to result in fatal and
2120     // hard to debug problems later because when deleting the second
2121     // associated wxSizerItem we're going to dereference a dangling
2122     // pointer; so try to detect this as early as possible
2123     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2124                   wxT("Adding a window to the same sizer twice?") );
2125
2126     m_containingSizer = sizer;
2127 }
2128
2129 #if wxUSE_CONSTRAINTS
2130
2131 void wxWindowBase::SatisfyConstraints()
2132 {
2133     wxLayoutConstraints *constr = GetConstraints();
2134     bool wasOk = constr && constr->AreSatisfied();
2135
2136     ResetConstraints();   // Mark all constraints as unevaluated
2137
2138     int noChanges = 1;
2139
2140     // if we're a top level panel (i.e. our parent is frame/dialog), our
2141     // own constraints will never be satisfied any more unless we do it
2142     // here
2143     if ( wasOk )
2144     {
2145         while ( noChanges > 0 )
2146         {
2147             LayoutPhase1(&noChanges);
2148         }
2149     }
2150
2151     LayoutPhase2(&noChanges);
2152 }
2153
2154 #endif // wxUSE_CONSTRAINTS
2155
2156 bool wxWindowBase::Layout()
2157 {
2158     // If there is a sizer, use it instead of the constraints
2159     if ( GetSizer() )
2160     {
2161         int w = 0, h = 0;
2162         GetVirtualSize(&w, &h);
2163         GetSizer()->SetDimension( 0, 0, w, h );
2164     }
2165 #if wxUSE_CONSTRAINTS
2166     else
2167     {
2168         SatisfyConstraints(); // Find the right constraints values
2169         SetConstraintSizes(); // Recursively set the real window sizes
2170     }
2171 #endif
2172
2173     return true;
2174 }
2175
2176 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2177 {
2178     if ( GetAutoLayout() )
2179         Layout();
2180
2181     event.Skip();
2182 }
2183
2184 #if wxUSE_CONSTRAINTS
2185
2186 // first phase of the constraints evaluation: set our own constraints
2187 bool wxWindowBase::LayoutPhase1(int *noChanges)
2188 {
2189     wxLayoutConstraints *constr = GetConstraints();
2190
2191     return !constr || constr->SatisfyConstraints(this, noChanges);
2192 }
2193
2194 // second phase: set the constraints for our children
2195 bool wxWindowBase::LayoutPhase2(int *noChanges)
2196 {
2197     *noChanges = 0;
2198
2199     // Layout children
2200     DoPhase(1);
2201
2202     // Layout grand children
2203     DoPhase(2);
2204
2205     return true;
2206 }
2207
2208 // Do a phase of evaluating child constraints
2209 bool wxWindowBase::DoPhase(int phase)
2210 {
2211     // the list containing the children for which the constraints are already
2212     // set correctly
2213     wxWindowList succeeded;
2214
2215     // the max number of iterations we loop before concluding that we can't set
2216     // the constraints
2217     static const int maxIterations = 500;
2218
2219     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2220     {
2221         int noChanges = 0;
2222
2223         // loop over all children setting their constraints
2224         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2225               node;
2226               node = node->GetNext() )
2227         {
2228             wxWindow *child = node->GetData();
2229             if ( child->IsTopLevel() )
2230             {
2231                 // top level children are not inside our client area
2232                 continue;
2233             }
2234
2235             if ( !child->GetConstraints() || succeeded.Find(child) )
2236             {
2237                 // this one is either already ok or nothing we can do about it
2238                 continue;
2239             }
2240
2241             int tempNoChanges = 0;
2242             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2243                                       : child->LayoutPhase2(&tempNoChanges);
2244             noChanges += tempNoChanges;
2245
2246             if ( success )
2247             {
2248                 succeeded.Append(child);
2249             }
2250         }
2251
2252         if ( !noChanges )
2253         {
2254             // constraints are set
2255             break;
2256         }
2257     }
2258
2259     return true;
2260 }
2261
2262 void wxWindowBase::ResetConstraints()
2263 {
2264     wxLayoutConstraints *constr = GetConstraints();
2265     if ( constr )
2266     {
2267         constr->left.SetDone(false);
2268         constr->top.SetDone(false);
2269         constr->right.SetDone(false);
2270         constr->bottom.SetDone(false);
2271         constr->width.SetDone(false);
2272         constr->height.SetDone(false);
2273         constr->centreX.SetDone(false);
2274         constr->centreY.SetDone(false);
2275     }
2276
2277     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2278     while (node)
2279     {
2280         wxWindow *win = node->GetData();
2281         if ( !win->IsTopLevel() )
2282             win->ResetConstraints();
2283         node = node->GetNext();
2284     }
2285 }
2286
2287 // Need to distinguish between setting the 'fake' size for windows and sizers,
2288 // and setting the real values.
2289 void wxWindowBase::SetConstraintSizes(bool recurse)
2290 {
2291     wxLayoutConstraints *constr = GetConstraints();
2292     if ( constr && constr->AreSatisfied() )
2293     {
2294         int x = constr->left.GetValue();
2295         int y = constr->top.GetValue();
2296         int w = constr->width.GetValue();
2297         int h = constr->height.GetValue();
2298
2299         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2300              (constr->height.GetRelationship() != wxAsIs) )
2301         {
2302             // We really shouldn't set negative sizes for the windows so make
2303             // them at least of 1*1 size
2304             SetSize(x, y, w > 0 ? w : 1, h > 0 ? h : 1);
2305         }
2306         else
2307         {
2308             // If we don't want to resize this window, just move it...
2309             Move(x, y);
2310         }
2311     }
2312     else if ( constr )
2313     {
2314         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2315                    GetClassInfo()->GetClassName(),
2316                    GetName().c_str());
2317     }
2318
2319     if ( recurse )
2320     {
2321         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2322         while (node)
2323         {
2324             wxWindow *win = node->GetData();
2325             if ( !win->IsTopLevel() && win->GetConstraints() )
2326                 win->SetConstraintSizes();
2327             node = node->GetNext();
2328         }
2329     }
2330 }
2331
2332 // Only set the size/position of the constraint (if any)
2333 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2334 {
2335     wxLayoutConstraints *constr = GetConstraints();
2336     if ( constr )
2337     {
2338         if ( x != wxDefaultCoord )
2339         {
2340             constr->left.SetValue(x);
2341             constr->left.SetDone(true);
2342         }
2343         if ( y != wxDefaultCoord )
2344         {
2345             constr->top.SetValue(y);
2346             constr->top.SetDone(true);
2347         }
2348         if ( w != wxDefaultCoord )
2349         {
2350             constr->width.SetValue(w);
2351             constr->width.SetDone(true);
2352         }
2353         if ( h != wxDefaultCoord )
2354         {
2355             constr->height.SetValue(h);
2356             constr->height.SetDone(true);
2357         }
2358     }
2359 }
2360
2361 void wxWindowBase::MoveConstraint(int x, int y)
2362 {
2363     wxLayoutConstraints *constr = GetConstraints();
2364     if ( constr )
2365     {
2366         if ( x != wxDefaultCoord )
2367         {
2368             constr->left.SetValue(x);
2369             constr->left.SetDone(true);
2370         }
2371         if ( y != wxDefaultCoord )
2372         {
2373             constr->top.SetValue(y);
2374             constr->top.SetDone(true);
2375         }
2376     }
2377 }
2378
2379 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2380 {
2381     wxLayoutConstraints *constr = GetConstraints();
2382     if ( constr )
2383     {
2384         *w = constr->width.GetValue();
2385         *h = constr->height.GetValue();
2386     }
2387     else
2388         GetSize(w, h);
2389 }
2390
2391 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2392 {
2393     wxLayoutConstraints *constr = GetConstraints();
2394     if ( constr )
2395     {
2396         *w = constr->width.GetValue();
2397         *h = constr->height.GetValue();
2398     }
2399     else
2400         GetClientSize(w, h);
2401 }
2402
2403 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2404 {
2405     wxLayoutConstraints *constr = GetConstraints();
2406     if ( constr )
2407     {
2408         *x = constr->left.GetValue();
2409         *y = constr->top.GetValue();
2410     }
2411     else
2412         GetPosition(x, y);
2413 }
2414
2415 #endif // wxUSE_CONSTRAINTS
2416
2417 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2418 {
2419     // don't do it for the dialogs/frames - they float independently of their
2420     // parent
2421     if ( !IsTopLevel() )
2422     {
2423         wxWindow *parent = GetParent();
2424         if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2425         {
2426             wxPoint pt(parent->GetClientAreaOrigin());
2427             x += pt.x;
2428             y += pt.y;
2429         }
2430     }
2431 }
2432
2433 // ----------------------------------------------------------------------------
2434 // Update UI processing
2435 // ----------------------------------------------------------------------------
2436
2437 void wxWindowBase::UpdateWindowUI(long flags)
2438 {
2439     wxUpdateUIEvent event(GetId());
2440     event.SetEventObject(this);
2441
2442     if ( GetEventHandler()->ProcessEvent(event) )
2443     {
2444         DoUpdateWindowUI(event);
2445     }
2446
2447     if (flags & wxUPDATE_UI_RECURSE)
2448     {
2449         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2450         while (node)
2451         {
2452             wxWindow* child = (wxWindow*) node->GetData();
2453             child->UpdateWindowUI(flags);
2454             node = node->GetNext();
2455         }
2456     }
2457 }
2458
2459 // do the window-specific processing after processing the update event
2460 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2461 {
2462     if ( event.GetSetEnabled() )
2463         Enable(event.GetEnabled());
2464
2465     if ( event.GetSetShown() )
2466         Show(event.GetShown());
2467 }
2468
2469 // ----------------------------------------------------------------------------
2470 // dialog units translations
2471 // ----------------------------------------------------------------------------
2472
2473 // Windows' computes dialog units using average character width over upper-
2474 // and lower-case ASCII alphabet and not using the average character width
2475 // metadata stored in the font; see
2476 // http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion.
2477 // It's important that we perform the conversion in identical way, because
2478 // dialog units natively exist only on Windows and Windows HIG is expressed
2479 // using them.
2480 wxSize wxWindowBase::GetDlgUnitBase() const
2481 {
2482     const wxWindowBase * const parent = wxGetTopLevelParent((wxWindow*)this);
2483
2484     if ( !parent->m_font.IsOk() )
2485     {
2486         // Default GUI font is used. This is the most common case, so
2487         // cache the results.
2488         static wxSize s_defFontSize;
2489         if ( s_defFontSize.x == 0 )
2490             s_defFontSize = wxPrivate::GetAverageASCIILetterSize(*parent);
2491         return s_defFontSize;
2492     }
2493     else
2494     {
2495         // Custom font, we always need to compute the result
2496         return wxPrivate::GetAverageASCIILetterSize(*parent);
2497     }
2498 }
2499
2500 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt) const
2501 {
2502     const wxSize base = GetDlgUnitBase();
2503
2504     // NB: wxMulDivInt32() is used, because it correctly rounds the result
2505
2506     wxPoint pt2 = wxDefaultPosition;
2507     if (pt.x != wxDefaultCoord)
2508         pt2.x = wxMulDivInt32(pt.x, 4, base.x);
2509     if (pt.y != wxDefaultCoord)
2510         pt2.y = wxMulDivInt32(pt.y, 8, base.y);
2511
2512     return pt2;
2513 }
2514
2515 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt) const
2516 {
2517     const wxSize base = GetDlgUnitBase();
2518
2519     wxPoint pt2 = wxDefaultPosition;
2520     if (pt.x != wxDefaultCoord)
2521         pt2.x = wxMulDivInt32(pt.x, base.x, 4);
2522     if (pt.y != wxDefaultCoord)
2523         pt2.y = wxMulDivInt32(pt.y, base.y, 8);
2524
2525     return pt2;
2526 }
2527
2528 // ----------------------------------------------------------------------------
2529 // event handlers
2530 // ----------------------------------------------------------------------------
2531
2532 // propagate the colour change event to the subwindows
2533 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
2534 {
2535     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2536     while ( node )
2537     {
2538         // Only propagate to non-top-level windows
2539         wxWindow *win = node->GetData();
2540         if ( !win->IsTopLevel() )
2541         {
2542             wxSysColourChangedEvent event2;
2543             event2.SetEventObject(win);
2544             win->GetEventHandler()->ProcessEvent(event2);
2545         }
2546
2547         node = node->GetNext();
2548     }
2549
2550     Refresh();
2551 }
2552
2553 // the default action is to populate dialog with data when it's created,
2554 // and nudge the UI into displaying itself correctly in case
2555 // we've turned the wxUpdateUIEvents frequency down low.
2556 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2557 {
2558     TransferDataToWindow();
2559
2560     // Update the UI at this point
2561     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2562 }
2563
2564 // ----------------------------------------------------------------------------
2565 // menu-related functions
2566 // ----------------------------------------------------------------------------
2567
2568 #if wxUSE_MENUS
2569
2570 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2571 {
2572     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2573
2574     wxMenuInvokingWindowSetter
2575         setInvokingWin(*menu, static_cast<wxWindow *>(this));
2576
2577     wxCurrentPopupMenu = menu;
2578     const bool rc = DoPopupMenu(menu, x, y);
2579     wxCurrentPopupMenu = NULL;
2580
2581     return rc;
2582 }
2583
2584 // this is used to pass the id of the selected item from the menu event handler
2585 // to the main function itself
2586 //
2587 // it's ok to use a global here as there can be at most one popup menu shown at
2588 // any time
2589 static int gs_popupMenuSelection = wxID_NONE;
2590
2591 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2592 {
2593     // store the id in a global variable where we'll retrieve it from later
2594     gs_popupMenuSelection = event.GetId();
2595 }
2596
2597 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2598 {
2599     // nothing to do but do not skip it
2600 }
2601
2602 int
2603 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2604 {
2605     gs_popupMenuSelection = wxID_NONE;
2606
2607     Connect(wxEVT_COMMAND_MENU_SELECTED,
2608             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2609             NULL,
2610             this);
2611
2612     // it is common to construct the menu passed to this function dynamically
2613     // using some fixed range of ids which could clash with the ids used
2614     // elsewhere in the program, which could result in some menu items being
2615     // unintentionally disabled or otherwise modified by update UI handlers
2616     // elsewhere in the program code and this is difficult to avoid in the
2617     // program itself, so instead we just temporarily suspend UI updating while
2618     // this menu is shown
2619     Connect(wxEVT_UPDATE_UI,
2620             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2621             NULL,
2622             this);
2623
2624     PopupMenu(&menu, x, y);
2625
2626     Disconnect(wxEVT_UPDATE_UI,
2627                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2628                NULL,
2629                this);
2630     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2631                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2632                NULL,
2633                this);
2634
2635     return gs_popupMenuSelection;
2636 }
2637
2638 #endif // wxUSE_MENUS
2639
2640 // methods for drawing the sizers in a visible way: this is currently only
2641 // enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
2642 // that well and also because we don't want to leave it enabled in default
2643 // builds used for production
2644 #if wxDEBUG_LEVEL > 1
2645
2646 static void DrawSizers(wxWindowBase *win);
2647
2648 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2649 {
2650     wxClientDC dc((wxWindow *)win);
2651     dc.SetPen(*pen);
2652     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2653                        *wxTRANSPARENT_BRUSH);
2654     dc.DrawRectangle(rect.Deflate(1, 1));
2655 }
2656
2657 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2658 {
2659     const wxSizerItemList& items = sizer->GetChildren();
2660     for ( wxSizerItemList::const_iterator i = items.begin(),
2661                                         end = items.end();
2662           i != end;
2663           ++i )
2664     {
2665         wxSizerItem *item = *i;
2666         if ( item->IsSizer() )
2667         {
2668             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2669             DrawSizer(win, item->GetSizer());
2670         }
2671         else if ( item->IsSpacer() )
2672         {
2673             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2674         }
2675         else if ( item->IsWindow() )
2676         {
2677             DrawSizers(item->GetWindow());
2678         }
2679         else
2680             wxFAIL_MSG("inconsistent wxSizerItem status!");
2681     }
2682 }
2683
2684 static void DrawSizers(wxWindowBase *win)
2685 {
2686     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2687
2688     wxSizer *sizer = win->GetSizer();
2689     if ( sizer )
2690     {
2691         DrawSizer(win, sizer);
2692     }
2693     else // no sizer, still recurse into the children
2694     {
2695         const wxWindowList& children = win->GetChildren();
2696         for ( wxWindowList::const_iterator i = children.begin(),
2697                                          end = children.end();
2698               i != end;
2699               ++i )
2700         {
2701             DrawSizers(*i);
2702         }
2703
2704         // show all kind of sizes of this window; see the "window sizing" topic
2705         // overview for more info about the various differences:
2706         wxSize fullSz = win->GetSize();
2707         wxSize clientSz = win->GetClientSize();
2708         wxSize bestSz = win->GetBestSize();
2709         wxSize minSz = win->GetMinSize();
2710         wxSize maxSz = win->GetMaxSize();
2711         wxSize virtualSz = win->GetVirtualSize();
2712
2713         wxMessageOutputDebug dbgout;
2714         dbgout.Printf(
2715             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
2716             win->GetName(),
2717             fullSz.x, fullSz.y,
2718             clientSz.x, clientSz.y,
2719             bestSz.x, bestSz.y,
2720             minSz.x, minSz.y,
2721             maxSz.x, maxSz.y,
2722             virtualSz.x, virtualSz.y);
2723     }
2724 }
2725
2726 #endif // wxDEBUG_LEVEL
2727
2728 // process special middle clicks
2729 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
2730 {
2731     if ( event.ControlDown() && event.AltDown() )
2732     {
2733 #if wxDEBUG_LEVEL > 1
2734         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
2735         if ( event.ShiftDown() )
2736         {
2737             DrawSizers(this);
2738         }
2739         else
2740 #endif // __WXDEBUG__
2741         {
2742 #if wxUSE_MSGDLG
2743             // just Ctrl-Alt-middle click shows information about wx version
2744             ::wxInfoMessageBox((wxWindow*)this);
2745 #endif // wxUSE_MSGDLG
2746         }
2747     }
2748     else
2749     {
2750         event.Skip();
2751     }
2752 }
2753
2754 // ----------------------------------------------------------------------------
2755 // accessibility
2756 // ----------------------------------------------------------------------------
2757
2758 #if wxUSE_ACCESSIBILITY
2759 void wxWindowBase::SetAccessible(wxAccessible* accessible)
2760 {
2761     if (m_accessible && (accessible != m_accessible))
2762         delete m_accessible;
2763     m_accessible = accessible;
2764     if (m_accessible)
2765         m_accessible->SetWindow((wxWindow*) this);
2766 }
2767
2768 // Returns the accessible object, creating if necessary.
2769 wxAccessible* wxWindowBase::GetOrCreateAccessible()
2770 {
2771     if (!m_accessible)
2772         m_accessible = CreateAccessible();
2773     return m_accessible;
2774 }
2775
2776 // Override to create a specific accessible object.
2777 wxAccessible* wxWindowBase::CreateAccessible()
2778 {
2779     return new wxWindowAccessible((wxWindow*) this);
2780 }
2781
2782 #endif
2783
2784 // ----------------------------------------------------------------------------
2785 // list classes implementation
2786 // ----------------------------------------------------------------------------
2787
2788 #if wxUSE_STL
2789
2790 #include "wx/listimpl.cpp"
2791 WX_DEFINE_LIST(wxWindowList)
2792
2793 #else // !wxUSE_STL
2794
2795 void wxWindowListNode::DeleteData()
2796 {
2797     delete (wxWindow *)GetData();
2798 }
2799
2800 #endif // wxUSE_STL/!wxUSE_STL
2801
2802 // ----------------------------------------------------------------------------
2803 // borders
2804 // ----------------------------------------------------------------------------
2805
2806 wxBorder wxWindowBase::GetBorder(long flags) const
2807 {
2808     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
2809     if ( border == wxBORDER_DEFAULT )
2810     {
2811         border = GetDefaultBorder();
2812     }
2813     else if ( border == wxBORDER_THEME )
2814     {
2815         border = GetDefaultBorderForControl();
2816     }
2817
2818     return border;
2819 }
2820
2821 wxBorder wxWindowBase::GetDefaultBorder() const
2822 {
2823     return wxBORDER_NONE;
2824 }
2825
2826 // ----------------------------------------------------------------------------
2827 // hit testing
2828 // ----------------------------------------------------------------------------
2829
2830 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
2831 {
2832     // here we just check if the point is inside the window or not
2833
2834     // check the top and left border first
2835     bool outside = x < 0 || y < 0;
2836     if ( !outside )
2837     {
2838         // check the right and bottom borders too
2839         wxSize size = GetSize();
2840         outside = x >= size.x || y >= size.y;
2841     }
2842
2843     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
2844 }
2845
2846 // ----------------------------------------------------------------------------
2847 // mouse capture
2848 // ----------------------------------------------------------------------------
2849
2850 struct WXDLLEXPORT wxWindowNext
2851 {
2852     wxWindow *win;
2853     wxWindowNext *next;
2854 } *wxWindowBase::ms_winCaptureNext = NULL;
2855 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
2856 bool wxWindowBase::ms_winCaptureChanging = false;
2857
2858 void wxWindowBase::CaptureMouse()
2859 {
2860     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
2861
2862     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
2863
2864     ms_winCaptureChanging = true;
2865
2866     wxWindow *winOld = GetCapture();
2867     if ( winOld )
2868     {
2869         ((wxWindowBase*) winOld)->DoReleaseMouse();
2870
2871         // save it on stack
2872         wxWindowNext *item = new wxWindowNext;
2873         item->win = winOld;
2874         item->next = ms_winCaptureNext;
2875         ms_winCaptureNext = item;
2876     }
2877     //else: no mouse capture to save
2878
2879     DoCaptureMouse();
2880     ms_winCaptureCurrent = (wxWindow*)this;
2881
2882     ms_winCaptureChanging = false;
2883 }
2884
2885 void wxWindowBase::ReleaseMouse()
2886 {
2887     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
2888
2889     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
2890
2891     wxASSERT_MSG( GetCapture() == this,
2892                   "attempt to release mouse, but this window hasn't captured it" );
2893     wxASSERT_MSG( ms_winCaptureCurrent == this,
2894                   "attempt to release mouse, but this window hasn't captured it" );
2895
2896     ms_winCaptureChanging = true;
2897
2898     DoReleaseMouse();
2899     ms_winCaptureCurrent = NULL;
2900
2901     if ( ms_winCaptureNext )
2902     {
2903         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
2904         ms_winCaptureCurrent = ms_winCaptureNext->win;
2905
2906         wxWindowNext *item = ms_winCaptureNext;
2907         ms_winCaptureNext = item->next;
2908         delete item;
2909     }
2910     //else: stack is empty, no previous capture
2911
2912     ms_winCaptureChanging = false;
2913
2914     wxLogTrace(wxT("mousecapture"),
2915         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
2916         static_cast<void*>(GetCapture()));
2917 }
2918
2919 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
2920 {
2921     wxMouseCaptureLostEvent event(win->GetId());
2922     event.SetEventObject(win);
2923     if ( !win->GetEventHandler()->ProcessEvent(event) )
2924     {
2925         // windows must handle this event, otherwise the app wouldn't behave
2926         // correctly if it loses capture unexpectedly; see the discussion here:
2927         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
2928         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
2929         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
2930     }
2931 }
2932
2933 /* static */
2934 void wxWindowBase::NotifyCaptureLost()
2935 {
2936     // don't do anything if capture lost was expected, i.e. resulted from
2937     // a wx call to ReleaseMouse or CaptureMouse:
2938     if ( ms_winCaptureChanging )
2939         return;
2940
2941     // if the capture was lost unexpectedly, notify every window that has
2942     // capture (on stack or current) about it and clear the stack:
2943
2944     if ( ms_winCaptureCurrent )
2945     {
2946         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
2947         ms_winCaptureCurrent = NULL;
2948     }
2949
2950     while ( ms_winCaptureNext )
2951     {
2952         wxWindowNext *item = ms_winCaptureNext;
2953         ms_winCaptureNext = item->next;
2954
2955         DoNotifyWindowAboutCaptureLost(item->win);
2956
2957         delete item;
2958     }
2959 }
2960
2961 #if wxUSE_HOTKEY
2962
2963 bool
2964 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
2965                              int WXUNUSED(modifiers),
2966                              int WXUNUSED(keycode))
2967 {
2968     // not implemented
2969     return false;
2970 }
2971
2972 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
2973 {
2974     // not implemented
2975     return false;
2976 }
2977
2978 #endif // wxUSE_HOTKEY
2979
2980 // ----------------------------------------------------------------------------
2981 // event processing
2982 // ----------------------------------------------------------------------------
2983
2984 bool wxWindowBase::TryBefore(wxEvent& event)
2985 {
2986 #if wxUSE_VALIDATORS
2987     // Can only use the validator of the window which
2988     // is receiving the event
2989     if ( event.GetEventObject() == this )
2990     {
2991         wxValidator * const validator = GetValidator();
2992         if ( validator && validator->ProcessEventLocally(event) )
2993         {
2994             return true;
2995         }
2996     }
2997 #endif // wxUSE_VALIDATORS
2998
2999     return wxEvtHandler::TryBefore(event);
3000 }
3001
3002 bool wxWindowBase::TryAfter(wxEvent& event)
3003 {
3004     // carry on up the parent-child hierarchy if the propagation count hasn't
3005     // reached zero yet
3006     if ( event.ShouldPropagate() )
3007     {
3008         // honour the requests to stop propagation at this window: this is
3009         // used by the dialogs, for example, to prevent processing the events
3010         // from the dialog controls in the parent frame which rarely, if ever,
3011         // makes sense
3012         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
3013         {
3014             wxWindow *parent = GetParent();
3015             if ( parent && !parent->IsBeingDeleted() )
3016             {
3017                 wxPropagateOnce propagateOnce(event);
3018
3019                 return parent->GetEventHandler()->ProcessEvent(event);
3020             }
3021         }
3022     }
3023
3024     return wxEvtHandler::TryAfter(event);
3025 }
3026
3027 // ----------------------------------------------------------------------------
3028 // window relationships
3029 // ----------------------------------------------------------------------------
3030
3031 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
3032 {
3033     wxCHECK_MSG( GetParent(), NULL,
3034                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
3035
3036     wxWindowList& siblings = GetParent()->GetChildren();
3037     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
3038     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
3039
3040     if ( order == OrderBefore )
3041         i = i->GetPrevious();
3042     else // OrderAfter
3043         i = i->GetNext();
3044
3045     return i ? i->GetData() : NULL;
3046 }
3047
3048 // ----------------------------------------------------------------------------
3049 // keyboard navigation
3050 // ----------------------------------------------------------------------------
3051
3052 // Navigates in the specified direction inside this window
3053 bool wxWindowBase::DoNavigateIn(int flags)
3054 {
3055 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
3056     // native code doesn't process our wxNavigationKeyEvents anyhow
3057     wxUnusedVar(flags);
3058     return false;
3059 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
3060     wxNavigationKeyEvent eventNav;
3061     wxWindow *focused = FindFocus();
3062     eventNav.SetCurrentFocus(focused);
3063     eventNav.SetEventObject(focused);
3064     eventNav.SetFlags(flags);
3065     return GetEventHandler()->ProcessEvent(eventNav);
3066 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
3067 }
3068
3069 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
3070 {
3071     if ( event.GetKeyCode() != WXK_TAB )
3072         return false;
3073
3074     int flags = wxNavigationKeyEvent::FromTab;
3075
3076     if ( event.ShiftDown() )
3077         flags |= wxNavigationKeyEvent::IsBackward;
3078     else
3079         flags |= wxNavigationKeyEvent::IsForward;
3080
3081     if ( event.ControlDown() )
3082         flags |= wxNavigationKeyEvent::WinChange;
3083
3084     Navigate(flags);
3085     return true;
3086 }
3087
3088 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
3089 {
3090     // check that we're not a top level window
3091     wxCHECK_RET( GetParent(),
3092                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
3093
3094     // detect the special case when we have nothing to do anyhow and when the
3095     // code below wouldn't work
3096     if ( win == this )
3097         return;
3098
3099     // find the target window in the siblings list
3100     wxWindowList& siblings = GetParent()->GetChildren();
3101     wxWindowList::compatibility_iterator i = siblings.Find(win);
3102     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3103
3104     // unfortunately, when wxUSE_STL == 1 DetachNode() is not implemented so we
3105     // can't just move the node around
3106     wxWindow *self = (wxWindow *)this;
3107     siblings.DeleteObject(self);
3108     if ( move == OrderAfter )
3109     {
3110         i = i->GetNext();
3111     }
3112
3113     if ( i )
3114     {
3115         siblings.Insert(i, self);
3116     }
3117     else // OrderAfter and win was the last sibling
3118     {
3119         siblings.Append(self);
3120     }
3121 }
3122
3123 // ----------------------------------------------------------------------------
3124 // focus handling
3125 // ----------------------------------------------------------------------------
3126
3127 /*static*/ wxWindow* wxWindowBase::FindFocus()
3128 {
3129     wxWindowBase *win = DoFindFocus();
3130     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3131 }
3132
3133 bool wxWindowBase::HasFocus() const
3134 {
3135     wxWindowBase *win = DoFindFocus();
3136     return win == this ||
3137            win == wxConstCast(this, wxWindowBase)->GetMainWindowOfCompositeControl();
3138 }
3139
3140 // ----------------------------------------------------------------------------
3141 // drag and drop
3142 // ----------------------------------------------------------------------------
3143
3144 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3145
3146 namespace
3147 {
3148
3149 class DragAcceptFilesTarget : public wxFileDropTarget
3150 {
3151 public:
3152     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3153
3154     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3155                              const wxArrayString& filenames)
3156     {
3157         wxDropFilesEvent event(wxEVT_DROP_FILES,
3158                                filenames.size(),
3159                                wxCArrayString(filenames).Release());
3160         event.SetEventObject(m_win);
3161         event.m_pos.x = x;
3162         event.m_pos.y = y;
3163
3164         return m_win->HandleWindowEvent(event);
3165     }
3166
3167 private:
3168     wxWindowBase * const m_win;
3169
3170     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3171 };
3172
3173
3174 } // anonymous namespace
3175
3176 // Generic version of DragAcceptFiles(). It works by installing a simple
3177 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3178 // together with explicit SetDropTarget() calls.
3179 void wxWindowBase::DragAcceptFiles(bool accept)
3180 {
3181     if ( accept )
3182     {
3183         wxASSERT_MSG( !GetDropTarget(),
3184                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3185         SetDropTarget(new DragAcceptFilesTarget(this));
3186     }
3187     else
3188     {
3189         SetDropTarget(NULL);
3190     }
3191 }
3192
3193 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3194
3195 // ----------------------------------------------------------------------------
3196 // global functions
3197 // ----------------------------------------------------------------------------
3198
3199 wxWindow* wxGetTopLevelParent(wxWindow *win)
3200 {
3201     while ( win && !win->IsTopLevel() )
3202          win = win->GetParent();
3203
3204     return win;
3205 }
3206
3207 #if wxUSE_ACCESSIBILITY
3208 // ----------------------------------------------------------------------------
3209 // accessible object for windows
3210 // ----------------------------------------------------------------------------
3211
3212 // Can return either a child object, or an integer
3213 // representing the child element, starting from 1.
3214 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3215 {
3216     wxASSERT( GetWindow() != NULL );
3217     if (!GetWindow())
3218         return wxACC_FAIL;
3219
3220     return wxACC_NOT_IMPLEMENTED;
3221 }
3222
3223 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3224 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3225 {
3226     wxASSERT( GetWindow() != NULL );
3227     if (!GetWindow())
3228         return wxACC_FAIL;
3229
3230     wxWindow* win = NULL;
3231     if (elementId == 0)
3232     {
3233         win = GetWindow();
3234     }
3235     else
3236     {
3237         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3238         {
3239             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3240         }
3241         else
3242             return wxACC_FAIL;
3243     }
3244     if (win)
3245     {
3246         rect = win->GetRect();
3247         if (win->GetParent() && !win->IsKindOf(CLASSINFO(wxTopLevelWindow)))
3248             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3249         return wxACC_OK;
3250     }
3251
3252     return wxACC_NOT_IMPLEMENTED;
3253 }
3254
3255 // Navigates from fromId to toId/toObject.
3256 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3257                              int* WXUNUSED(toId), wxAccessible** toObject)
3258 {
3259     wxASSERT( GetWindow() != NULL );
3260     if (!GetWindow())
3261         return wxACC_FAIL;
3262
3263     switch (navDir)
3264     {
3265     case wxNAVDIR_FIRSTCHILD:
3266         {
3267             if (GetWindow()->GetChildren().GetCount() == 0)
3268                 return wxACC_FALSE;
3269             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3270             *toObject = childWindow->GetOrCreateAccessible();
3271
3272             return wxACC_OK;
3273         }
3274     case wxNAVDIR_LASTCHILD:
3275         {
3276             if (GetWindow()->GetChildren().GetCount() == 0)
3277                 return wxACC_FALSE;
3278             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3279             *toObject = childWindow->GetOrCreateAccessible();
3280
3281             return wxACC_OK;
3282         }
3283     case wxNAVDIR_RIGHT:
3284     case wxNAVDIR_DOWN:
3285     case wxNAVDIR_NEXT:
3286         {
3287             wxWindowList::compatibility_iterator node =
3288                 wxWindowList::compatibility_iterator();
3289             if (fromId == 0)
3290             {
3291                 // Can't navigate to sibling of this window
3292                 // if we're a top-level window.
3293                 if (!GetWindow()->GetParent())
3294                     return wxACC_NOT_IMPLEMENTED;
3295
3296                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3297             }
3298             else
3299             {
3300                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3301                     node = GetWindow()->GetChildren().Item(fromId-1);
3302             }
3303
3304             if (node && node->GetNext())
3305             {
3306                 wxWindow* nextWindow = node->GetNext()->GetData();
3307                 *toObject = nextWindow->GetOrCreateAccessible();
3308                 return wxACC_OK;
3309             }
3310             else
3311                 return wxACC_FALSE;
3312         }
3313     case wxNAVDIR_LEFT:
3314     case wxNAVDIR_UP:
3315     case wxNAVDIR_PREVIOUS:
3316         {
3317             wxWindowList::compatibility_iterator node =
3318                 wxWindowList::compatibility_iterator();
3319             if (fromId == 0)
3320             {
3321                 // Can't navigate to sibling of this window
3322                 // if we're a top-level window.
3323                 if (!GetWindow()->GetParent())
3324                     return wxACC_NOT_IMPLEMENTED;
3325
3326                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3327             }
3328             else
3329             {
3330                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3331                     node = GetWindow()->GetChildren().Item(fromId-1);
3332             }
3333
3334             if (node && node->GetPrevious())
3335             {
3336                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3337                 *toObject = previousWindow->GetOrCreateAccessible();
3338                 return wxACC_OK;
3339             }
3340             else
3341                 return wxACC_FALSE;
3342         }
3343     }
3344
3345     return wxACC_NOT_IMPLEMENTED;
3346 }
3347
3348 // Gets the name of the specified object.
3349 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3350 {
3351     wxASSERT( GetWindow() != NULL );
3352     if (!GetWindow())
3353         return wxACC_FAIL;
3354
3355     wxString title;
3356
3357     // If a child, leave wxWidgets to call the function on the actual
3358     // child object.
3359     if (childId > 0)
3360         return wxACC_NOT_IMPLEMENTED;
3361
3362     // This will eventually be replaced by specialised
3363     // accessible classes, one for each kind of wxWidgets
3364     // control or window.
3365 #if wxUSE_BUTTON
3366     if (GetWindow()->IsKindOf(CLASSINFO(wxButton)))
3367         title = ((wxButton*) GetWindow())->GetLabel();
3368     else
3369 #endif
3370         title = GetWindow()->GetName();
3371
3372     if (!title.empty())
3373     {
3374         *name = title;
3375         return wxACC_OK;
3376     }
3377     else
3378         return wxACC_NOT_IMPLEMENTED;
3379 }
3380
3381 // Gets the number of children.
3382 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3383 {
3384     wxASSERT( GetWindow() != NULL );
3385     if (!GetWindow())
3386         return wxACC_FAIL;
3387
3388     *childId = (int) GetWindow()->GetChildren().GetCount();
3389     return wxACC_OK;
3390 }
3391
3392 // Gets the specified child (starting from 1).
3393 // If *child is NULL and return value is wxACC_OK,
3394 // this means that the child is a simple element and
3395 // not an accessible object.
3396 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3397 {
3398     wxASSERT( GetWindow() != NULL );
3399     if (!GetWindow())
3400         return wxACC_FAIL;
3401
3402     if (childId == 0)
3403     {
3404         *child = this;
3405         return wxACC_OK;
3406     }
3407
3408     if (childId > (int) GetWindow()->GetChildren().GetCount())
3409         return wxACC_FAIL;
3410
3411     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3412     *child = childWindow->GetOrCreateAccessible();
3413     if (*child)
3414         return wxACC_OK;
3415     else
3416         return wxACC_FAIL;
3417 }
3418
3419 // Gets the parent, or NULL.
3420 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3421 {
3422     wxASSERT( GetWindow() != NULL );
3423     if (!GetWindow())
3424         return wxACC_FAIL;
3425
3426     wxWindow* parentWindow = GetWindow()->GetParent();
3427     if (!parentWindow)
3428     {
3429         *parent = NULL;
3430         return wxACC_OK;
3431     }
3432     else
3433     {
3434         *parent = parentWindow->GetOrCreateAccessible();
3435         if (*parent)
3436             return wxACC_OK;
3437         else
3438             return wxACC_FAIL;
3439     }
3440 }
3441
3442 // Performs the default action. childId is 0 (the action for this object)
3443 // or > 0 (the action for a child).
3444 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3445 // window (e.g. an edit control).
3446 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3447 {
3448     wxASSERT( GetWindow() != NULL );
3449     if (!GetWindow())
3450         return wxACC_FAIL;
3451
3452     return wxACC_NOT_IMPLEMENTED;
3453 }
3454
3455 // Gets the default action for this object (0) or > 0 (the action for a child).
3456 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3457 // string if there is no action.
3458 // The retrieved string describes the action that is performed on an object,
3459 // not what the object does as a result. For example, a toolbar button that prints
3460 // a document has a default action of "Press" rather than "Prints the current document."
3461 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3462 {
3463     wxASSERT( GetWindow() != NULL );
3464     if (!GetWindow())
3465         return wxACC_FAIL;
3466
3467     return wxACC_NOT_IMPLEMENTED;
3468 }
3469
3470 // Returns the description for this object or a child.
3471 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3472 {
3473     wxASSERT( GetWindow() != NULL );
3474     if (!GetWindow())
3475         return wxACC_FAIL;
3476
3477     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3478     if (!ht.empty())
3479     {
3480         *description = ht;
3481         return wxACC_OK;
3482     }
3483     return wxACC_NOT_IMPLEMENTED;
3484 }
3485
3486 // Returns help text for this object or a child, similar to tooltip text.
3487 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3488 {
3489     wxASSERT( GetWindow() != NULL );
3490     if (!GetWindow())
3491         return wxACC_FAIL;
3492
3493     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3494     if (!ht.empty())
3495     {
3496         *helpText = ht;
3497         return wxACC_OK;
3498     }
3499     return wxACC_NOT_IMPLEMENTED;
3500 }
3501
3502 // Returns the keyboard shortcut for this object or child.
3503 // Return e.g. ALT+K
3504 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3505 {
3506     wxASSERT( GetWindow() != NULL );
3507     if (!GetWindow())
3508         return wxACC_FAIL;
3509
3510     return wxACC_NOT_IMPLEMENTED;
3511 }
3512
3513 // Returns a role constant.
3514 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3515 {
3516     wxASSERT( GetWindow() != NULL );
3517     if (!GetWindow())
3518         return wxACC_FAIL;
3519
3520     // If a child, leave wxWidgets to call the function on the actual
3521     // child object.
3522     if (childId > 0)
3523         return wxACC_NOT_IMPLEMENTED;
3524
3525     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3526         return wxACC_NOT_IMPLEMENTED;
3527 #if wxUSE_STATUSBAR
3528     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3529         return wxACC_NOT_IMPLEMENTED;
3530 #endif
3531 #if wxUSE_TOOLBAR
3532     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3533         return wxACC_NOT_IMPLEMENTED;
3534 #endif
3535
3536     //*role = wxROLE_SYSTEM_CLIENT;
3537     *role = wxROLE_SYSTEM_CLIENT;
3538     return wxACC_OK;
3539
3540     #if 0
3541     return wxACC_NOT_IMPLEMENTED;
3542     #endif
3543 }
3544
3545 // Returns a state constant.
3546 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3547 {
3548     wxASSERT( GetWindow() != NULL );
3549     if (!GetWindow())
3550         return wxACC_FAIL;
3551
3552     // If a child, leave wxWidgets to call the function on the actual
3553     // child object.
3554     if (childId > 0)
3555         return wxACC_NOT_IMPLEMENTED;
3556
3557     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3558         return wxACC_NOT_IMPLEMENTED;
3559
3560 #if wxUSE_STATUSBAR
3561     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3562         return wxACC_NOT_IMPLEMENTED;
3563 #endif
3564 #if wxUSE_TOOLBAR
3565     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3566         return wxACC_NOT_IMPLEMENTED;
3567 #endif
3568
3569     *state = 0;
3570     return wxACC_OK;
3571
3572     #if 0
3573     return wxACC_NOT_IMPLEMENTED;
3574     #endif
3575 }
3576
3577 // Returns a localized string representing the value for the object
3578 // or child.
3579 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3580 {
3581     wxASSERT( GetWindow() != NULL );
3582     if (!GetWindow())
3583         return wxACC_FAIL;
3584
3585     return wxACC_NOT_IMPLEMENTED;
3586 }
3587
3588 // Selects the object or child.
3589 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3590 {
3591     wxASSERT( GetWindow() != NULL );
3592     if (!GetWindow())
3593         return wxACC_FAIL;
3594
3595     return wxACC_NOT_IMPLEMENTED;
3596 }
3597
3598 // Gets the window with the keyboard focus.
3599 // If childId is 0 and child is NULL, no object in
3600 // this subhierarchy has the focus.
3601 // If this object has the focus, child should be 'this'.
3602 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3603 {
3604     wxASSERT( GetWindow() != NULL );
3605     if (!GetWindow())
3606         return wxACC_FAIL;
3607
3608     return wxACC_NOT_IMPLEMENTED;
3609 }
3610
3611 #if wxUSE_VARIANT
3612 // Gets a variant representing the selected children
3613 // of this object.
3614 // Acceptable values:
3615 // - a null variant (IsNull() returns true)
3616 // - a list variant (GetType() == wxT("list")
3617 // - an integer representing the selected child element,
3618 //   or 0 if this object is selected (GetType() == wxT("long")
3619 // - a "void*" pointer to a wxAccessible child object
3620 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3621 {
3622     wxASSERT( GetWindow() != NULL );
3623     if (!GetWindow())
3624         return wxACC_FAIL;
3625
3626     return wxACC_NOT_IMPLEMENTED;
3627 }
3628 #endif // wxUSE_VARIANT
3629
3630 #endif // wxUSE_ACCESSIBILITY
3631
3632 // ----------------------------------------------------------------------------
3633 // RTL support
3634 // ----------------------------------------------------------------------------
3635
3636 wxCoord
3637 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3638                                        wxCoord width,
3639                                        wxCoord widthTotal) const
3640 {
3641     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3642     {
3643         x = widthTotal - x - width;
3644     }
3645
3646     return x;
3647 }
3648
3649