src/common/wincmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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) wxWindows team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  21     #pragma implementation "windowbase.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33     #include "wx/log.h"
  34     #include "wx/intl.h"
  35     #include "wx/frame.h"
  36     #include "wx/defs.h"
  37     #include "wx/window.h"
  38     #include "wx/control.h"
  39     #include "wx/checkbox.h"
  40     #include "wx/radiobut.h"
  41     #include "wx/statbox.h"
  42     #include "wx/textctrl.h"
  43     #include "wx/settings.h"
  44     #include "wx/dialog.h"
  45     #include "wx/msgdlg.h"
  46     #include "wx/statusbr.h"
  47     #include "wx/dcclient.h"
  48 #endif //WX_PRECOMP
  49
  50 #if wxUSE_CONSTRAINTS
  51     #include "wx/layout.h"
  52 #endif // wxUSE_CONSTRAINTS
  53
  54 #include "wx/sizer.h"
  55
  56 #if wxUSE_DRAG_AND_DROP
  57     #include "wx/dnd.h"
  58 #endif // wxUSE_DRAG_AND_DROP
  59
  60 #if wxUSE_ACCESSIBILITY
  61     #include "wx/access.h"
  62 #endif
  63
  64 #if wxUSE_HELP
  65     #include "wx/cshelp.h"
  66 #endif // wxUSE_HELP
  67
  68 #if wxUSE_TOOLTIPS
  69     #include "wx/tooltip.h"
  70 #endif // wxUSE_TOOLTIPS
  71
  72 #if wxUSE_CARET
  73     #include "wx/caret.h"
  74 #endif // wxUSE_CARET
  75
  76 // ----------------------------------------------------------------------------
  77 // static data
  78 // ----------------------------------------------------------------------------
  79
  80 #if defined(__WXPM__)
  81 int wxWindowBase::ms_lastControlId = 2000;
  82 #else
  83 int wxWindowBase::ms_lastControlId = -200;
  84 #endif
  85
  86 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  87
  88 // ----------------------------------------------------------------------------
  89 // event table
  90 // ----------------------------------------------------------------------------
  91
  92 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  93     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  94     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  95     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
  96
  97 #if wxUSE_HELP
  98     EVT_HELP(wxID_ANY, wxWindowBase::OnHelp)
  99 #endif // wxUSE_HELP
 100
 101 END_EVENT_TABLE()
 102
 103 // ============================================================================
 104 // implementation of the common functionality of the wxWindow class
 105 // ============================================================================
 106
 107 // ----------------------------------------------------------------------------
 108 // initialization
 109 // ----------------------------------------------------------------------------
 110
 111 // the default initialization
 112 wxWindowBase::wxWindowBase()
 113 {
 114     // no window yet, no parent nor children
 115     m_parent = (wxWindow *)NULL;
 116     m_windowId = wxID_ANY;
 117
 118     // no constraints on the minimal window size
 119     m_minWidth =
 120     m_minHeight =
 121     m_maxWidth =
 122     m_maxHeight = -1;
 123
 124     // window is created enabled but it's not visible yet
 125     m_isShown = false;
 126     m_isEnabled = true;
 127
 128     // the default event handler is just this window
 129     m_eventHandler = this;
 130
 131 #if wxUSE_VALIDATORS
 132     // no validator
 133     m_windowValidator = (wxValidator *) NULL;
 134 #endif // wxUSE_VALIDATORS
 135
 136     // use the system default colours
 137     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
 138     m_foregroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
 139
 140     // don't set the font here for wxMSW as we don't call WM_SETFONT here and
 141     // so the font is *not* really set - but calls to SetFont() later won't do
 142     // anything because m_font appears to be already set!
 143 #ifndef __WXMSW__
 144     m_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 145 #endif // __WXMSW__
 146
 147     // the colours/fonts are default for now
 148     m_hasBgCol =
 149     m_hasFgCol =
 150     m_hasFont = false;
 151
 152     m_isBeingDeleted = false;
 153
 154     // no style bits
 155     m_exStyle =
 156     m_windowStyle = 0;
 157
 158 #if wxUSE_CONSTRAINTS
 159     // no constraints whatsoever
 160     m_constraints = (wxLayoutConstraints *) NULL;
 161     m_constraintsInvolvedIn = (wxWindowList *) NULL;
 162 #endif // wxUSE_CONSTRAINTS
 163
 164     m_windowSizer = (wxSizer *) NULL;
 165     m_containingSizer = (wxSizer *) NULL;
 166     m_autoLayout = false;
 167
 168 #if wxUSE_DRAG_AND_DROP
 169     m_dropTarget = (wxDropTarget *)NULL;
 170 #endif // wxUSE_DRAG_AND_DROP
 171
 172 #if wxUSE_TOOLTIPS
 173     m_tooltip = (wxToolTip *)NULL;
 174 #endif // wxUSE_TOOLTIPS
 175
 176 #if wxUSE_CARET
 177     m_caret = (wxCaret *)NULL;
 178 #endif // wxUSE_CARET
 179
 180 #if wxUSE_PALETTE
 181     m_hasCustomPalette = false;
 182 #endif // wxUSE_PALETTE
 183
 184 #if wxUSE_ACCESSIBILITY
 185     m_accessible = NULL;
 186 #endif
 187
 188     m_virtualSize = wxDefaultSize;
 189
 190     m_minVirtualWidth =
 191     m_minVirtualHeight =
 192     m_maxVirtualWidth =
 193     m_maxVirtualHeight = -1;
 194
 195     m_windowVariant = wxWINDOW_VARIANT_DEFAULT ;
 196
 197     // Whether we're using the current theme for this window (wxGTK only for now)
 198     m_themeEnabled = false;
 199 }
 200
 201 // common part of window creation process
 202 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 203                               wxWindowID id,
 204                               const wxPoint& WXUNUSED(pos),
 205                               const wxSize& WXUNUSED(size),
 206                               long style,
 207                               const wxValidator& wxVALIDATOR_PARAM(validator),
 208                               const wxString& name)
 209 {
 210 #if wxUSE_STATBOX
 211     // wxGTK doesn't allow to create controls with static box as the parent so
 212     // this will result in a crash when the program is ported to wxGTK so warn
 213     // the user about it
 214
 215     // if you get this assert, the correct solution is to create the controls
 216     // as siblings of the static box
 217     wxASSERT_MSG( !parent || !wxDynamicCast(parent, wxStaticBox),
 218                   _T("wxStaticBox can't be used as a window parent!") );
 219 #endif // wxUSE_STATBOX
 220
 221     // ids are limited to 16 bits under MSW so if you care about portability,
 222     // it's not a good idea to use ids out of this range (and negative ids are
 223     // reserved for wxWindows own usage)
 224     wxASSERT_MSG( id == wxID_ANY || (id >= 0 && id < 32767),
 225                   _T("invalid id value") );
 226
 227     // generate a new id if the user doesn't care about it
 228     m_windowId = id == wxID_ANY ? NewControlId() : id;
 229
 230     SetName(name);
 231     SetWindowStyleFlag(style);
 232     SetParent(parent);
 233
 234 #if wxUSE_VALIDATORS
 235     SetValidator(validator);
 236 #endif // wxUSE_VALIDATORS
 237
 238     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 239     // have it too - like this it's possible to set it only in the top level
 240     // dialog/frame and all children will inherit it by defult
 241     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 242     {
 243         SetExtraStyle(GetExtraStyle() | wxWS_EX_VALIDATE_RECURSIVELY);
 244     }
 245
 246     return true;
 247 }
 248
 249 // ----------------------------------------------------------------------------
 250 // destruction
 251 // ----------------------------------------------------------------------------
 252
 253 // common clean up
 254 wxWindowBase::~wxWindowBase()
 255 {
 256     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 257
 258     // FIXME if these 2 cases result from programming errors in the user code
 259     //       we should probably assert here instead of silently fixing them
 260
 261     // Just in case the window has been Closed, but we're then deleting
 262     // immediately: don't leave dangling pointers.
 263     wxPendingDelete.DeleteObject(this);
 264
 265     // Just in case we've loaded a top-level window via LoadNativeDialog but
 266     // we weren't a dialog class
 267     wxTopLevelWindows.DeleteObject((wxWindow*)this);
 268
 269     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 270
 271     // reset the dangling pointer our parent window may keep to us
 272     if ( m_parent )
 273     {
 274         if ( m_parent->GetDefaultItem() == this )
 275         {
 276             m_parent->SetDefaultItem(NULL);
 277         }
 278
 279         m_parent->RemoveChild(this);
 280     }
 281
 282 #if wxUSE_CARET
 283     delete m_caret;
 284 #endif // wxUSE_CARET
 285
 286 #if wxUSE_VALIDATORS
 287     delete m_windowValidator;
 288 #endif // wxUSE_VALIDATORS
 289
 290 #if wxUSE_CONSTRAINTS
 291     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 292     // at deleted windows as they delete themselves.
 293     DeleteRelatedConstraints();
 294
 295     if ( m_constraints )
 296     {
 297         // This removes any dangling pointers to this window in other windows'
 298         // constraintsInvolvedIn lists.
 299         UnsetConstraints(m_constraints);
 300         delete m_constraints;
 301         m_constraints = NULL;
 302     }
 303 #endif // wxUSE_CONSTRAINTS
 304
 305     if ( m_containingSizer )
 306         m_containingSizer->Detach( (wxWindow*)this );
 307
 308     delete m_windowSizer;
 309
 310 #if wxUSE_DRAG_AND_DROP
 311     delete m_dropTarget;
 312 #endif // wxUSE_DRAG_AND_DROP
 313
 314 #if wxUSE_TOOLTIPS
 315     delete m_tooltip;
 316 #endif // wxUSE_TOOLTIPS
 317
 318 #if wxUSE_ACCESSIBILITY
 319     delete m_accessible;
 320 #endif
 321 }
 322
 323 bool wxWindowBase::Destroy()
 324 {
 325     delete this;
 326
 327     return true;
 328 }
 329
 330 bool wxWindowBase::Close(bool force)
 331 {
 332     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 333     event.SetEventObject(this);
 334     event.SetCanVeto(!force);
 335
 336     // return false if window wasn't closed because the application vetoed the
 337     // close event
 338     return GetEventHandler()->ProcessEvent(event) && !event.GetVeto();
 339 }
 340
 341 bool wxWindowBase::DestroyChildren()
 342 {
 343     wxWindowList::compatibility_iterator node;
 344     for ( ;; )
 345     {
 346         // we iterate until the list becomes empty
 347         node = GetChildren().GetFirst();
 348         if ( !node )
 349             break;
 350
 351         wxWindow *child = node->GetData();
 352
 353         // note that we really want to call delete and not ->Destroy() here
 354         // because we want to delete the child immediately, before we are
 355         // deleted, and delayed deletion would result in problems as our (top
 356         // level) child could outlive its parent
 357         delete child;
 358
 359         wxASSERT_MSG( !GetChildren().Find(child),
 360                       wxT("child didn't remove itself using RemoveChild()") );
 361     }
 362
 363     return true;
 364 }
 365
 366 // ----------------------------------------------------------------------------
 367 // size/position related methods
 368 // ----------------------------------------------------------------------------
 369
 370 // centre the window with respect to its parent in either (or both) directions
 371 void wxWindowBase::Centre(int direction)
 372 {
 373     // the position/size of the parent window or of the entire screen
 374     wxPoint posParent;
 375     int widthParent, heightParent;
 376
 377     wxWindow *parent = NULL;
 378
 379     if ( !(direction & wxCENTRE_ON_SCREEN) )
 380     {
 381         // find the parent to centre this window on: it should be the
 382         // immediate parent for the controls but the top level parent for the
 383         // top level windows (like dialogs)
 384         parent = GetParent();
 385         if ( IsTopLevel() )
 386         {
 387             while ( parent && !parent->IsTopLevel() )
 388             {
 389                 parent = parent->GetParent();
 390             }
 391         }
 392
 393         // there is no wxTopLevelWindow under wxMotif yet
 394 #ifndef __WXMOTIF__
 395         // we shouldn't center the dialog on the iconized window: under
 396         // Windows, for example, this places it completely off the screen
 397         if ( parent )
 398         {
 399             wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
 400             if ( winTop && winTop->IsIconized() )
 401             {
 402                 parent = NULL;
 403             }
 404         }
 405 #endif // __WXMOTIF__
 406
 407         // did we find the parent?
 408         if ( !parent )
 409         {
 410             // no other choice
 411             direction |= wxCENTRE_ON_SCREEN;
 412         }
 413     }
 414
 415     if ( direction & wxCENTRE_ON_SCREEN )
 416     {
 417         // centre with respect to the whole screen
 418         wxDisplaySize(&widthParent, &heightParent);
 419     }
 420     else
 421     {
 422         if ( IsTopLevel() )
 423         {
 424             // centre on the parent
 425             parent->GetSize(&widthParent, &heightParent);
 426
 427             // adjust to the parents position
 428             posParent = parent->GetPosition();
 429         }
 430         else
 431         {
 432             // centre inside the parents client rectangle
 433             parent->GetClientSize(&widthParent, &heightParent);
 434         }
 435     }
 436
 437     int width, height;
 438     GetSize(&width, &height);
 439
 440     int xNew = -1,
 441         yNew = -1;
 442
 443     if ( direction & wxHORIZONTAL )
 444         xNew = (widthParent - width)/2;
 445
 446     if ( direction & wxVERTICAL )
 447         yNew = (heightParent - height)/2;
 448
 449     xNew += posParent.x;
 450     yNew += posParent.y;
 451
 452     // Base size of the visible dimensions of the display
 453     // to take into account the taskbar
 454     wxRect rect = wxGetClientDisplayRect();
 455     wxSize size (rect.width,rect.height);
 456
 457     // NB: in wxMSW, negative position may not neccessary mean "out of screen",
 458     //     but it may mean that the window is placed on other than the main
 459     //     display. Therefore we only make sure centered window is on the main display
 460     //     if the parent is at least partially present here.
 461     if (posParent.x + widthParent >= 0)  // if parent is (partially) on the main display
 462     {
 463         if (xNew < 0)
 464             xNew = 0;
 465         else if (xNew+width > size.x)
 466             xNew = size.x-width-1;
 467     }
 468     if (posParent.y + heightParent >= 0)  // if parent is (partially) on the main display
 469     {
 470         if (yNew+height > size.y)
 471             yNew = size.y-height-1;
 472
 473         // Make certain that the title bar is initially visible
 474         // always, even if this would push the bottom of the
 475         // dialog of the visible area of the display
 476         if (yNew < 0)
 477             yNew = 0;
 478     }
 479
 480     // move the window to this position (keeping the old size but using
 481     // SetSize() and not Move() to allow xNew and/or yNew to be -1)
 482     SetSize(xNew, yNew, width, height, wxSIZE_ALLOW_MINUS_ONE);
 483 }
 484
 485 // fits the window around the children
 486 void wxWindowBase::Fit()
 487 {
 488     if ( GetChildren().GetCount() > 0 )
 489     {
 490         SetClientSize(DoGetBestSize());
 491     }
 492     //else: do nothing if we have no children
 493 }
 494
 495 // fits virtual size (ie. scrolled area etc.) around children
 496 void wxWindowBase::FitInside()
 497 {
 498     if ( GetChildren().GetCount() > 0 )
 499     {
 500         SetVirtualSize( GetBestVirtualSize() );
 501     }
 502 }
 503
 504 // return the size best suited for the current window
 505 wxSize wxWindowBase::DoGetBestSize() const
 506 {
 507     if ( m_windowSizer )
 508     {
 509         return m_windowSizer->GetMinSize();
 510     }
 511 #if wxUSE_CONSTRAINTS
 512     else if ( m_constraints )
 513     {
 514         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 515
 516         // our minimal acceptable size is such that all our windows fit inside
 517         int maxX = 0,
 518             maxY = 0;
 519
 520         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 521               node;
 522               node = node->GetNext() )
 523         {
 524             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 525             if ( !c )
 526             {
 527                 // it's not normal that we have an unconstrained child, but
 528                 // what can we do about it?
 529                 continue;
 530             }
 531
 532             int x = c->right.GetValue(),
 533                 y = c->bottom.GetValue();
 534
 535             if ( x > maxX )
 536                 maxX = x;
 537
 538             if ( y > maxY )
 539                 maxY = y;
 540
 541             // TODO: we must calculate the overlaps somehow, otherwise we
 542             //       will never return a size bigger than the current one :-(
 543         }
 544
 545         return wxSize(maxX, maxY);
 546     }
 547 #endif // wxUSE_CONSTRAINTS
 548     else if ( GetChildren().GetCount() > 0 )
 549     {
 550         // our minimal acceptable size is such that all our windows fit inside
 551         int maxX = 0,
 552             maxY = 0;
 553
 554         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 555               node;
 556               node = node->GetNext() )
 557         {
 558             wxWindow *win = node->GetData();
 559             if ( win->IsTopLevel()
 560 #if wxUSE_STATUSBAR
 561                     || wxDynamicCast(win, wxStatusBar)
 562 #endif // wxUSE_STATUSBAR
 563                )
 564             {
 565                 // dialogs and frames lie in different top level windows -
 566                 // don't deal with them here; as for the status bars, they
 567                 // don't lie in the client area at all
 568                 continue;
 569             }
 570
 571             int wx, wy, ww, wh;
 572             win->GetPosition(&wx, &wy);
 573
 574             // if the window hadn't been positioned yet, assume that it is in
 575             // the origin
 576             if ( wx == -1 )
 577                 wx = 0;
 578             if ( wy == -1 )
 579                 wy = 0;
 580
 581             win->GetSize(&ww, &wh);
 582             if ( wx + ww > maxX )
 583                 maxX = wx + ww;
 584             if ( wy + wh > maxY )
 585                 maxY = wy + wh;
 586         }
 587
 588         // for compatibility with the old versions and because it really looks
 589         // slightly more pretty like this, add a pad
 590         maxX += 7;
 591         maxY += 14;
 592
 593         return wxSize(maxX, maxY);
 594     }
 595     else
 596     {
 597         // for a generic window there is no natural best size - just use the
 598         // current one
 599         return GetSize();
 600     }
 601 }
 602
 603 // by default the origin is not shifted
 604 wxPoint wxWindowBase::GetClientAreaOrigin() const
 605 {
 606     return wxPoint(0, 0);
 607 }
 608
 609 // set the min/max size of the window
 610 void wxWindowBase::SetSizeHints(int minW, int minH,
 611                                 int maxW, int maxH,
 612                                 int WXUNUSED(incW), int WXUNUSED(incH))
 613 {
 614     // setting min width greater than max width leads to infinite loops under
 615     // X11 and generally doesn't make any sense, so don't allow it
 616     wxCHECK_RET( (minW == -1 || maxW == -1 || minW <= maxW) &&
 617                     (minH == -1 || maxH == -1 || minH <= maxH),
 618                  _T("min width/height must be less than max width/height!") );
 619
 620     m_minWidth = minW;
 621     m_maxWidth = maxW;
 622     m_minHeight = minH;
 623     m_maxHeight = maxH;
 624 }
 625
 626 void wxWindowBase::SetWindowVariant( wxWindowVariant variant )
 627 {
 628     if ( m_windowVariant == variant )
 629         return ;
 630
 631     m_windowVariant = variant ;
 632
 633     DoSetWindowVariant( variant ) ;
 634     return ;
 635 }
 636
 637 void wxWindowBase::DoSetWindowVariant( wxWindowVariant variant )
 638 {
 639     wxFont font = wxSystemSettings::GetSystemFont( wxSYS_DEFAULT_GUI_FONT ) ;
 640     int size = font.GetPointSize() ;
 641     switch ( variant )
 642     {
 643         case wxWINDOW_VARIANT_NORMAL :
 644             break ;
 645         case wxWINDOW_VARIANT_SMALL :
 646             font.SetPointSize( size * 3 / 4 ) ;
 647             break ;
 648         case wxWINDOW_VARIANT_MINI :
 649             font.SetPointSize( size * 2 / 3 ) ;
 650             break ;
 651         case wxWINDOW_VARIANT_LARGE :
 652             font.SetPointSize( size * 5 / 4 ) ;
 653             break ;
 654         case wxWINDOW_VARIANT_DEFAULT :
 655             break ;
 656         default:
 657             wxFAIL_MSG(_T("unexpected window variant"));
 658             break ;
 659     }
 660     SetFont( font ) ;
 661 }
 662
 663 void wxWindowBase::SetVirtualSizeHints( int minW, int minH,
 664                                         int maxW, int maxH )
 665 {
 666     m_minVirtualWidth = minW;
 667     m_maxVirtualWidth = maxW;
 668     m_minVirtualHeight = minH;
 669     m_maxVirtualHeight = maxH;
 670 }
 671
 672 void wxWindowBase::DoSetVirtualSize( int x, int y )
 673 {
 674     if ( m_minVirtualWidth != -1 && m_minVirtualWidth > x )
 675         x = m_minVirtualWidth;
 676     if ( m_maxVirtualWidth != -1 && m_maxVirtualWidth < x )
 677         x = m_maxVirtualWidth;
 678     if ( m_minVirtualHeight != -1 && m_minVirtualHeight > y )
 679         y = m_minVirtualHeight;
 680     if ( m_maxVirtualHeight != -1 && m_maxVirtualHeight < y )
 681         y = m_maxVirtualHeight;
 682
 683     m_virtualSize = wxSize(x, y);
 684 }
 685
 686 wxSize wxWindowBase::DoGetVirtualSize() const
 687 {
 688     wxSize  s( GetClientSize() );
 689
 690     return wxSize( wxMax( m_virtualSize.GetWidth(), s.GetWidth() ),
 691                    wxMax( m_virtualSize.GetHeight(), s.GetHeight() ) );
 692 }
 693
 694 // ----------------------------------------------------------------------------
 695 // show/hide/enable/disable the window
 696 // ----------------------------------------------------------------------------
 697
 698 bool wxWindowBase::Show(bool show)
 699 {
 700     if ( show != m_isShown )
 701     {
 702         m_isShown = show;
 703
 704         return true;
 705     }
 706     else
 707     {
 708         return false;
 709     }
 710 }
 711
 712 bool wxWindowBase::Enable(bool enable)
 713 {
 714     if ( enable != m_isEnabled )
 715     {
 716         m_isEnabled = enable;
 717
 718         return true;
 719     }
 720     else
 721     {
 722         return false;
 723     }
 724 }
 725 // ----------------------------------------------------------------------------
 726 // RTTI
 727 // ----------------------------------------------------------------------------
 728
 729 bool wxWindowBase::IsTopLevel() const
 730 {
 731     return false;
 732 }
 733
 734 // ----------------------------------------------------------------------------
 735 // reparenting the window
 736 // ----------------------------------------------------------------------------
 737
 738 void wxWindowBase::AddChild(wxWindowBase *child)
 739 {
 740     wxCHECK_RET( child, wxT("can't add a NULL child") );
 741
 742     // this should never happen and it will lead to a crash later if it does
 743     // because RemoveChild() will remove only one node from the children list
 744     // and the other(s) one(s) will be left with dangling pointers in them
 745     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), _T("AddChild() called twice") );
 746
 747     GetChildren().Append((wxWindow*)child);
 748     child->SetParent(this);
 749 }
 750
 751 void wxWindowBase::RemoveChild(wxWindowBase *child)
 752 {
 753     wxCHECK_RET( child, wxT("can't remove a NULL child") );
 754
 755     GetChildren().DeleteObject((wxWindow *)child);
 756     child->SetParent(NULL);
 757 }
 758
 759 bool wxWindowBase::Reparent(wxWindowBase *newParent)
 760 {
 761     wxWindow *oldParent = GetParent();
 762     if ( newParent == oldParent )
 763     {
 764         // nothing done
 765         return false;
 766     }
 767
 768     // unlink this window from the existing parent.
 769     if ( oldParent )
 770     {
 771         oldParent->RemoveChild(this);
 772     }
 773     else
 774     {
 775         wxTopLevelWindows.DeleteObject((wxWindow *)this);
 776     }
 777
 778     // add it to the new one
 779     if ( newParent )
 780     {
 781         newParent->AddChild(this);
 782     }
 783     else
 784     {
 785         wxTopLevelWindows.Append((wxWindow *)this);
 786     }
 787
 788     return true;
 789 }
 790
 791 // ----------------------------------------------------------------------------
 792 // event handler stuff
 793 // ----------------------------------------------------------------------------
 794
 795 void wxWindowBase::PushEventHandler(wxEvtHandler *handler)
 796 {
 797     wxEvtHandler *handlerOld = GetEventHandler();
 798
 799     handler->SetNextHandler(handlerOld);
 800
 801     if ( handlerOld )
 802         GetEventHandler()->SetPreviousHandler(handler);
 803
 804     SetEventHandler(handler);
 805 }
 806
 807 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
 808 {
 809     wxEvtHandler *handlerA = GetEventHandler();
 810     if ( handlerA )
 811     {
 812         wxEvtHandler *handlerB = handlerA->GetNextHandler();
 813         handlerA->SetNextHandler((wxEvtHandler *)NULL);
 814
 815         if ( handlerB )
 816             handlerB->SetPreviousHandler((wxEvtHandler *)NULL);
 817         SetEventHandler(handlerB);
 818
 819         if ( deleteHandler )
 820         {
 821             delete handlerA;
 822             handlerA = (wxEvtHandler *)NULL;
 823         }
 824     }
 825
 826     return handlerA;
 827 }
 828
 829 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handler)
 830 {
 831     wxCHECK_MSG( handler, false, _T("RemoveEventHandler(NULL) called") );
 832
 833     wxEvtHandler *handlerPrev = NULL,
 834                  *handlerCur = GetEventHandler();
 835     while ( handlerCur )
 836     {
 837         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
 838
 839         if ( handlerCur == handler )
 840         {
 841             if ( handlerPrev )
 842             {
 843                 handlerPrev->SetNextHandler(handlerNext);
 844             }
 845             else
 846             {
 847                 SetEventHandler(handlerNext);
 848             }
 849
 850             if ( handlerNext )
 851             {
 852                 handlerNext->SetPreviousHandler ( handlerPrev );
 853             }
 854
 855             handler->SetNextHandler(NULL);
 856             handler->SetPreviousHandler(NULL);
 857
 858             return true;
 859         }
 860
 861         handlerPrev = handlerCur;
 862         handlerCur = handlerNext;
 863     }
 864
 865     wxFAIL_MSG( _T("where has the event handler gone?") );
 866
 867     return false;
 868 }
 869
 870 // ----------------------------------------------------------------------------
 871 // cursors, fonts &c
 872 // ----------------------------------------------------------------------------
 873
 874 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
 875 {
 876     if ( !colour.Ok() || (colour == m_backgroundColour) )
 877         return false;
 878
 879     m_backgroundColour = colour;
 880
 881     m_hasBgCol = true;
 882
 883     return true;
 884 }
 885
 886 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
 887 {
 888     if ( !colour.Ok() || (colour == m_foregroundColour) )
 889         return false;
 890
 891     m_foregroundColour = colour;
 892
 893     m_hasFgCol = true;
 894
 895     return true;
 896 }
 897
 898 bool wxWindowBase::SetCursor(const wxCursor& cursor)
 899 {
 900     // setting an invalid cursor is ok, it means that we don't have any special
 901     // cursor
 902     if ( m_cursor == cursor )
 903     {
 904         // no change
 905         return false;
 906     }
 907
 908     m_cursor = cursor;
 909
 910     return true;
 911 }
 912
 913 bool wxWindowBase::SetFont(const wxFont& font)
 914 {
 915     // don't try to set invalid font, always fall back to the default
 916     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 917
 918     if ( fontOk == m_font )
 919     {
 920         // no change
 921         return false;
 922     }
 923
 924     m_font = fontOk;
 925
 926     m_hasFont = true;
 927
 928     return true;
 929 }
 930
 931 #if wxUSE_PALETTE
 932
 933 void wxWindowBase::SetPalette(const wxPalette& pal)
 934 {
 935     m_hasCustomPalette = true;
 936     m_palette = pal;
 937
 938     // VZ: can anyone explain me what do we do here?
 939     wxWindowDC d((wxWindow *) this);
 940     d.SetPalette(pal);
 941 }
 942
 943 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
 944 {
 945     wxWindow *win = (wxWindow *)this;
 946     while ( win && !win->HasCustomPalette() )
 947     {
 948         win = win->GetParent();
 949     }
 950
 951     return win;
 952 }
 953
 954 #endif // wxUSE_PALETTE
 955
 956 #if wxUSE_CARET
 957 void wxWindowBase::SetCaret(wxCaret *caret)
 958 {
 959     if ( m_caret )
 960     {
 961         delete m_caret;
 962     }
 963
 964     m_caret = caret;
 965
 966     if ( m_caret )
 967     {
 968         wxASSERT_MSG( m_caret->GetWindow() == this,
 969                       wxT("caret should be created associated to this window") );
 970     }
 971 }
 972 #endif // wxUSE_CARET
 973
 974 #if wxUSE_VALIDATORS
 975 // ----------------------------------------------------------------------------
 976 // validators
 977 // ----------------------------------------------------------------------------
 978
 979 void wxWindowBase::SetValidator(const wxValidator& validator)
 980 {
 981     if ( m_windowValidator )
 982         delete m_windowValidator;
 983
 984     m_windowValidator = (wxValidator *)validator.Clone();
 985
 986     if ( m_windowValidator )
 987         m_windowValidator->SetWindow(this) ;
 988 }
 989 #endif // wxUSE_VALIDATORS
 990
 991 // ----------------------------------------------------------------------------
 992 // update region stuff
 993 // ----------------------------------------------------------------------------
 994
 995 wxRect wxWindowBase::GetUpdateClientRect() const
 996 {
 997     wxRegion rgnUpdate = GetUpdateRegion();
 998     rgnUpdate.Intersect(GetClientRect());
 999     wxRect rectUpdate = rgnUpdate.GetBox();
1000     wxPoint ptOrigin = GetClientAreaOrigin();
1001     rectUpdate.x -= ptOrigin.x;
1002     rectUpdate.y -= ptOrigin.y;
1003
1004     return rectUpdate;
1005 }
1006
1007 bool wxWindowBase::IsExposed(int x, int y) const
1008 {
1009     return m_updateRegion.Contains(x, y) != wxOutRegion;
1010 }
1011
1012 bool wxWindowBase::IsExposed(int x, int y, int w, int h) const
1013 {
1014     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1015 }
1016
1017 void wxWindowBase::ClearBackground()
1018 {
1019     // wxGTK uses its own version, no need to add never used code
1020 #ifndef __WXGTK__
1021     wxClientDC dc((wxWindow *)this);
1022     wxBrush brush(GetBackgroundColour(), wxSOLID);
1023     dc.SetBackground(brush);
1024     dc.Clear();
1025 #endif // __WXGTK__
1026 }
1027
1028 // ----------------------------------------------------------------------------
1029 // find child window by id or name
1030 // ----------------------------------------------------------------------------
1031
1032 wxWindow *wxWindowBase::FindWindow( long id )
1033 {
1034     if ( id == m_windowId )
1035         return (wxWindow *)this;
1036
1037     wxWindowBase *res = (wxWindow *)NULL;
1038     wxWindowList::compatibility_iterator node;
1039     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1040     {
1041         wxWindowBase *child = node->GetData();
1042         res = child->FindWindow( id );
1043     }
1044
1045     return (wxWindow *)res;
1046 }
1047
1048 wxWindow *wxWindowBase::FindWindow( const wxString& name )
1049 {
1050     if ( name == m_windowName )
1051         return (wxWindow *)this;
1052
1053     wxWindowBase *res = (wxWindow *)NULL;
1054     wxWindowList::compatibility_iterator node;
1055     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1056     {
1057         wxWindow *child = node->GetData();
1058         res = child->FindWindow(name);
1059     }
1060
1061     return (wxWindow *)res;
1062 }
1063
1064
1065 // find any window by id or name or label: If parent is non-NULL, look through
1066 // children for a label or title matching the specified string. If NULL, look
1067 // through all top-level windows.
1068 //
1069 // to avoid duplicating code we reuse the same helper function but with
1070 // different comparators
1071
1072 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1073                                 const wxString& label, long id);
1074
1075 static
1076 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1077                            long WXUNUSED(id))
1078 {
1079     return win->GetLabel() == label;
1080 }
1081
1082 static
1083 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1084                           long WXUNUSED(id))
1085 {
1086     return win->GetName() == label;
1087 }
1088
1089 static
1090 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1091                         long id)
1092 {
1093     return win->GetId() == id;
1094 }
1095
1096 // recursive helper for the FindWindowByXXX() functions
1097 static
1098 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1099                                   const wxString& label,
1100                                   long id,
1101                                   wxFindWindowCmp cmp)
1102 {
1103     if ( parent )
1104     {
1105         // see if this is the one we're looking for
1106         if ( (*cmp)(parent, label, id) )
1107             return (wxWindow *)parent;
1108
1109         // It wasn't, so check all its children
1110         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1111               node;
1112               node = node->GetNext() )
1113         {
1114             // recursively check each child
1115             wxWindow *win = (wxWindow *)node->GetData();
1116             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1117             if (retwin)
1118                 return retwin;
1119         }
1120     }
1121
1122     // Not found
1123     return NULL;
1124 }
1125
1126 // helper for FindWindowByXXX()
1127 static
1128 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1129                              const wxString& label,
1130                              long id,
1131                              wxFindWindowCmp cmp)
1132 {
1133     if ( parent )
1134     {
1135         // just check parent and all its children
1136         return wxFindWindowRecursively(parent, label, id, cmp);
1137     }
1138
1139     // start at very top of wx's windows
1140     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1141           node;
1142           node = node->GetNext() )
1143     {
1144         // recursively check each window & its children
1145         wxWindow *win = node->GetData();
1146         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1147         if (retwin)
1148             return retwin;
1149     }
1150
1151     return NULL;
1152 }
1153
1154 /* static */
1155 wxWindow *
1156 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1157 {
1158     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1159 }
1160
1161 /* static */
1162 wxWindow *
1163 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1164 {
1165     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1166
1167     if ( !win )
1168     {
1169         // fall back to the label
1170         win = FindWindowByLabel(title, parent);
1171     }
1172
1173     return win;
1174 }
1175
1176 /* static */
1177 wxWindow *
1178 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1179 {
1180     return wxFindWindowHelper(parent, _T(""), id, wxFindWindowCmpIds);
1181 }
1182
1183 // ----------------------------------------------------------------------------
1184 // dialog oriented functions
1185 // ----------------------------------------------------------------------------
1186
1187 void wxWindowBase::MakeModal(bool modal)
1188 {
1189     // Disable all other windows
1190     if ( IsTopLevel() )
1191     {
1192         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1193         while (node)
1194         {
1195             wxWindow *win = node->GetData();
1196             if (win != this)
1197                 win->Enable(!modal);
1198
1199             node = node->GetNext();
1200         }
1201     }
1202 }
1203
1204 bool wxWindowBase::Validate()
1205 {
1206 #if wxUSE_VALIDATORS
1207     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1208
1209     wxWindowList::compatibility_iterator node;
1210     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1211     {
1212         wxWindowBase *child = node->GetData();
1213         wxValidator *validator = child->GetValidator();
1214         if ( validator && !validator->Validate((wxWindow *)this) )
1215         {
1216             return false;
1217         }
1218
1219         if ( recurse && !child->Validate() )
1220         {
1221             return false;
1222         }
1223     }
1224 #endif // wxUSE_VALIDATORS
1225
1226     return true;
1227 }
1228
1229 bool wxWindowBase::TransferDataToWindow()
1230 {
1231 #if wxUSE_VALIDATORS
1232     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1233
1234     wxWindowList::compatibility_iterator node;
1235     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1236     {
1237         wxWindowBase *child = node->GetData();
1238         wxValidator *validator = child->GetValidator();
1239         if ( validator && !validator->TransferToWindow() )
1240         {
1241             wxLogWarning(_("Could not transfer data to window"));
1242 #if wxUSE_LOG
1243             wxLog::FlushActive();
1244 #endif // wxUSE_LOG
1245
1246             return false;
1247         }
1248
1249         if ( recurse )
1250         {
1251             if ( !child->TransferDataToWindow() )
1252             {
1253                 // warning already given
1254                 return false;
1255             }
1256         }
1257     }
1258 #endif // wxUSE_VALIDATORS
1259
1260     return true;
1261 }
1262
1263 bool wxWindowBase::TransferDataFromWindow()
1264 {
1265 #if wxUSE_VALIDATORS
1266     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1267
1268     wxWindowList::compatibility_iterator node;
1269     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1270     {
1271         wxWindow *child = node->GetData();
1272         wxValidator *validator = child->GetValidator();
1273         if ( validator && !validator->TransferFromWindow() )
1274         {
1275             // nop warning here because the application is supposed to give
1276             // one itself - we don't know here what might have gone wrongly
1277
1278             return false;
1279         }
1280
1281         if ( recurse )
1282         {
1283             if ( !child->TransferDataFromWindow() )
1284             {
1285                 // warning already given
1286                 return false;
1287             }
1288         }
1289     }
1290 #endif // wxUSE_VALIDATORS
1291
1292     return true;
1293 }
1294
1295 void wxWindowBase::InitDialog()
1296 {
1297     wxInitDialogEvent event(GetId());
1298     event.SetEventObject( this );
1299     GetEventHandler()->ProcessEvent(event);
1300 }
1301
1302 // ----------------------------------------------------------------------------
1303 // context-sensitive help support
1304 // ----------------------------------------------------------------------------
1305
1306 #if wxUSE_HELP
1307
1308 // associate this help text with this window
1309 void wxWindowBase::SetHelpText(const wxString& text)
1310 {
1311     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1312     if ( helpProvider )
1313     {
1314         helpProvider->AddHelp(this, text);
1315     }
1316 }
1317
1318 // associate this help text with all windows with the same id as this
1319 // one
1320 void wxWindowBase::SetHelpTextForId(const wxString& text)
1321 {
1322     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1323     if ( helpProvider )
1324     {
1325         helpProvider->AddHelp(GetId(), text);
1326     }
1327 }
1328
1329 // get the help string associated with this window (may be empty)
1330 wxString wxWindowBase::GetHelpText() const
1331 {
1332     wxString text;
1333     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1334     if ( helpProvider )
1335     {
1336         text = helpProvider->GetHelp(this);
1337     }
1338
1339     return text;
1340 }
1341
1342 // show help for this window
1343 void wxWindowBase::OnHelp(wxHelpEvent& event)
1344 {
1345     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1346     if ( helpProvider )
1347     {
1348         if ( helpProvider->ShowHelp(this) )
1349         {
1350             // skip the event.Skip() below
1351             return;
1352         }
1353     }
1354
1355     event.Skip();
1356 }
1357
1358 #endif // wxUSE_HELP
1359
1360 // ----------------------------------------------------------------------------
1361 // tooltipsroot.Replace("\\", "/");
1362 // ----------------------------------------------------------------------------
1363
1364 #if wxUSE_TOOLTIPS
1365
1366 void wxWindowBase::SetToolTip( const wxString &tip )
1367 {
1368     // don't create the new tooltip if we already have one
1369     if ( m_tooltip )
1370     {
1371         m_tooltip->SetTip( tip );
1372     }
1373     else
1374     {
1375         SetToolTip( new wxToolTip( tip ) );
1376     }
1377
1378     // setting empty tooltip text does not remove the tooltip any more - use
1379     // SetToolTip((wxToolTip *)NULL) for this
1380 }
1381
1382 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
1383 {
1384     if ( m_tooltip )
1385         delete m_tooltip;
1386
1387     m_tooltip = tooltip;
1388 }
1389
1390 #endif // wxUSE_TOOLTIPS
1391
1392 // ----------------------------------------------------------------------------
1393 // constraints and sizers
1394 // ----------------------------------------------------------------------------
1395
1396 #if wxUSE_CONSTRAINTS
1397
1398 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
1399 {
1400     if ( m_constraints )
1401     {
1402         UnsetConstraints(m_constraints);
1403         delete m_constraints;
1404     }
1405     m_constraints = constraints;
1406     if ( m_constraints )
1407     {
1408         // Make sure other windows know they're part of a 'meaningful relationship'
1409         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
1410             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
1411         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
1412             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
1413         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
1414             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
1415         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
1416             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
1417         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
1418             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
1419         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
1420             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
1421         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
1422             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
1423         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
1424             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
1425     }
1426 }
1427
1428 // This removes any dangling pointers to this window in other windows'
1429 // constraintsInvolvedIn lists.
1430 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
1431 {
1432     if ( c )
1433     {
1434         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1435             c->left.GetOtherWindow()->RemoveConstraintReference(this);
1436         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1437             c->top.GetOtherWindow()->RemoveConstraintReference(this);
1438         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
1439             c->right.GetOtherWindow()->RemoveConstraintReference(this);
1440         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
1441             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
1442         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
1443             c->width.GetOtherWindow()->RemoveConstraintReference(this);
1444         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
1445             c->height.GetOtherWindow()->RemoveConstraintReference(this);
1446         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
1447             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
1448         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
1449             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
1450     }
1451 }
1452
1453 // Back-pointer to other windows we're involved with, so if we delete this
1454 // window, we must delete any constraints we're involved with.
1455 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
1456 {
1457     if ( !m_constraintsInvolvedIn )
1458         m_constraintsInvolvedIn = new wxWindowList;
1459     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
1460         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
1461 }
1462
1463 // REMOVE back-pointer to other windows we're involved with.
1464 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
1465 {
1466     if ( m_constraintsInvolvedIn )
1467         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
1468 }
1469
1470 // Reset any constraints that mention this window
1471 void wxWindowBase::DeleteRelatedConstraints()
1472 {
1473     if ( m_constraintsInvolvedIn )
1474     {
1475         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
1476         while (node)
1477         {
1478             wxWindow *win = node->GetData();
1479             wxLayoutConstraints *constr = win->GetConstraints();
1480
1481             // Reset any constraints involving this window
1482             if ( constr )
1483             {
1484                 constr->left.ResetIfWin(this);
1485                 constr->top.ResetIfWin(this);
1486                 constr->right.ResetIfWin(this);
1487                 constr->bottom.ResetIfWin(this);
1488                 constr->width.ResetIfWin(this);
1489                 constr->height.ResetIfWin(this);
1490                 constr->centreX.ResetIfWin(this);
1491                 constr->centreY.ResetIfWin(this);
1492             }
1493
1494             wxWindowList::compatibility_iterator next = node->GetNext();
1495             m_constraintsInvolvedIn->Erase(node);
1496             node = next;
1497         }
1498
1499         delete m_constraintsInvolvedIn;
1500         m_constraintsInvolvedIn = (wxWindowList *) NULL;
1501     }
1502 }
1503
1504 #endif // wxUSE_CONSTRAINTS
1505
1506 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
1507 {
1508     if ( sizer == m_windowSizer)
1509         return;
1510
1511     if ( deleteOld )
1512         delete m_windowSizer;
1513
1514     m_windowSizer = sizer;
1515
1516     SetAutoLayout( sizer != NULL );
1517 }
1518
1519 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
1520 {
1521     SetSizer( sizer, deleteOld );
1522     sizer->SetSizeHints( (wxWindow*) this );
1523 }
1524
1525 #if wxUSE_CONSTRAINTS
1526
1527 void wxWindowBase::SatisfyConstraints()
1528 {
1529     wxLayoutConstraints *constr = GetConstraints();
1530     bool wasOk = constr && constr->AreSatisfied();
1531
1532     ResetConstraints();   // Mark all constraints as unevaluated
1533
1534     int noChanges = 1;
1535
1536     // if we're a top level panel (i.e. our parent is frame/dialog), our
1537     // own constraints will never be satisfied any more unless we do it
1538     // here
1539     if ( wasOk )
1540     {
1541         while ( noChanges > 0 )
1542         {
1543             LayoutPhase1(&noChanges);
1544         }
1545     }
1546
1547     LayoutPhase2(&noChanges);
1548 }
1549
1550 #endif // wxUSE_CONSTRAINTS
1551
1552 bool wxWindowBase::Layout()
1553 {
1554     // If there is a sizer, use it instead of the constraints
1555     if ( GetSizer() )
1556     {
1557         int w, h;
1558         GetVirtualSize(&w, &h);
1559         GetSizer()->SetDimension( 0, 0, w, h );
1560     }
1561 #if wxUSE_CONSTRAINTS
1562     else
1563     {
1564         SatisfyConstraints(); // Find the right constraints values
1565         SetConstraintSizes(); // Recursively set the real window sizes
1566     }
1567 #endif
1568
1569     return true;
1570 }
1571
1572 #if wxUSE_CONSTRAINTS
1573
1574 // first phase of the constraints evaluation: set our own constraints
1575 bool wxWindowBase::LayoutPhase1(int *noChanges)
1576 {
1577     wxLayoutConstraints *constr = GetConstraints();
1578
1579     return !constr || constr->SatisfyConstraints(this, noChanges);
1580 }
1581
1582 // second phase: set the constraints for our children
1583 bool wxWindowBase::LayoutPhase2(int *noChanges)
1584 {
1585     *noChanges = 0;
1586
1587     // Layout children
1588     DoPhase(1);
1589
1590     // Layout grand children
1591     DoPhase(2);
1592
1593     return true;
1594 }
1595
1596 // Do a phase of evaluating child constraints
1597 bool wxWindowBase::DoPhase(int phase)
1598 {
1599     // the list containing the children for which the constraints are already
1600     // set correctly
1601     wxWindowList succeeded;
1602
1603     // the max number of iterations we loop before concluding that we can't set
1604     // the constraints
1605     static const int maxIterations = 500;
1606
1607     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
1608     {
1609         int noChanges = 0;
1610
1611         // loop over all children setting their constraints
1612         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1613               node;
1614               node = node->GetNext() )
1615         {
1616             wxWindow *child = node->GetData();
1617             if ( child->IsTopLevel() )
1618             {
1619                 // top level children are not inside our client area
1620                 continue;
1621             }
1622
1623             if ( !child->GetConstraints() || succeeded.Find(child) )
1624             {
1625                 // this one is either already ok or nothing we can do about it
1626                 continue;
1627             }
1628
1629             int tempNoChanges = 0;
1630             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
1631                                       : child->LayoutPhase2(&tempNoChanges);
1632             noChanges += tempNoChanges;
1633
1634             if ( success )
1635             {
1636                 succeeded.Append(child);
1637             }
1638         }
1639
1640         if ( !noChanges )
1641         {
1642             // constraints are set
1643             break;
1644         }
1645     }
1646
1647     return true;
1648 }
1649
1650 void wxWindowBase::ResetConstraints()
1651 {
1652     wxLayoutConstraints *constr = GetConstraints();
1653     if ( constr )
1654     {
1655         constr->left.SetDone(false);
1656         constr->top.SetDone(false);
1657         constr->right.SetDone(false);
1658         constr->bottom.SetDone(false);
1659         constr->width.SetDone(false);
1660         constr->height.SetDone(false);
1661         constr->centreX.SetDone(false);
1662         constr->centreY.SetDone(false);
1663     }
1664
1665     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1666     while (node)
1667     {
1668         wxWindow *win = node->GetData();
1669         if ( !win->IsTopLevel() )
1670             win->ResetConstraints();
1671         node = node->GetNext();
1672     }
1673 }
1674
1675 // Need to distinguish between setting the 'fake' size for windows and sizers,
1676 // and setting the real values.
1677 void wxWindowBase::SetConstraintSizes(bool recurse)
1678 {
1679     wxLayoutConstraints *constr = GetConstraints();
1680     if ( constr && constr->AreSatisfied() )
1681     {
1682         int x = constr->left.GetValue();
1683         int y = constr->top.GetValue();
1684         int w = constr->width.GetValue();
1685         int h = constr->height.GetValue();
1686
1687         if ( (constr->width.GetRelationship() != wxAsIs ) ||
1688              (constr->height.GetRelationship() != wxAsIs) )
1689         {
1690             SetSize(x, y, w, h);
1691         }
1692         else
1693         {
1694             // If we don't want to resize this window, just move it...
1695             Move(x, y);
1696         }
1697     }
1698     else if ( constr )
1699     {
1700         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
1701                    GetClassInfo()->GetClassName(),
1702                    GetName().c_str());
1703     }
1704
1705     if ( recurse )
1706     {
1707         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1708         while (node)
1709         {
1710             wxWindow *win = node->GetData();
1711             if ( !win->IsTopLevel() && win->GetConstraints() )
1712                 win->SetConstraintSizes();
1713             node = node->GetNext();
1714         }
1715     }
1716 }
1717
1718 // Only set the size/position of the constraint (if any)
1719 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
1720 {
1721     wxLayoutConstraints *constr = GetConstraints();
1722     if ( constr )
1723     {
1724         if ( x != -1 )
1725         {
1726             constr->left.SetValue(x);
1727             constr->left.SetDone(true);
1728         }
1729         if ( y != -1 )
1730         {
1731             constr->top.SetValue(y);
1732             constr->top.SetDone(true);
1733         }
1734         if ( w != -1 )
1735         {
1736             constr->width.SetValue(w);
1737             constr->width.SetDone(true);
1738         }
1739         if ( h != -1 )
1740         {
1741             constr->height.SetValue(h);
1742             constr->height.SetDone(true);
1743         }
1744     }
1745 }
1746
1747 void wxWindowBase::MoveConstraint(int x, int y)
1748 {
1749     wxLayoutConstraints *constr = GetConstraints();
1750     if ( constr )
1751     {
1752         if ( x != -1 )
1753         {
1754             constr->left.SetValue(x);
1755             constr->left.SetDone(true);
1756         }
1757         if ( y != -1 )
1758         {
1759             constr->top.SetValue(y);
1760             constr->top.SetDone(true);
1761         }
1762     }
1763 }
1764
1765 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
1766 {
1767     wxLayoutConstraints *constr = GetConstraints();
1768     if ( constr )
1769     {
1770         *w = constr->width.GetValue();
1771         *h = constr->height.GetValue();
1772     }
1773     else
1774         GetSize(w, h);
1775 }
1776
1777 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
1778 {
1779     wxLayoutConstraints *constr = GetConstraints();
1780     if ( constr )
1781     {
1782         *w = constr->width.GetValue();
1783         *h = constr->height.GetValue();
1784     }
1785     else
1786         GetClientSize(w, h);
1787 }
1788
1789 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
1790 {
1791     wxLayoutConstraints *constr = GetConstraints();
1792     if ( constr )
1793     {
1794         *x = constr->left.GetValue();
1795         *y = constr->top.GetValue();
1796     }
1797     else
1798         GetPosition(x, y);
1799 }
1800
1801 #endif // wxUSE_CONSTRAINTS
1802
1803 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
1804 {
1805     // don't do it for the dialogs/frames - they float independently of their
1806     // parent
1807     if ( !IsTopLevel() )
1808     {
1809         wxWindow *parent = GetParent();
1810         if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
1811         {
1812             wxPoint pt(parent->GetClientAreaOrigin());
1813             x += pt.x;
1814             y += pt.y;
1815         }
1816     }
1817 }
1818
1819 // ----------------------------------------------------------------------------
1820 // do Update UI processing for child controls
1821 // ----------------------------------------------------------------------------
1822
1823 void wxWindowBase::UpdateWindowUI(long flags)
1824 {
1825     wxUpdateUIEvent event(GetId());
1826     event.m_eventObject = this;
1827
1828     if ( GetEventHandler()->ProcessEvent(event) )
1829     {
1830         DoUpdateWindowUI(event);
1831     }
1832
1833     if (flags & wxUPDATE_UI_RECURSE)
1834     {
1835         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1836         while (node)
1837         {
1838             wxWindow* child = (wxWindow*) node->GetData();
1839             child->UpdateWindowUI(flags);
1840             node = node->GetNext();
1841         }
1842     }
1843 }
1844
1845 // do the window-specific processing after processing the update event
1846 // TODO: take specific knowledge out of this function and
1847 // put in each control's base class. Unfortunately we don't
1848 // yet have base implementation files for wxCheckBox and wxRadioButton.
1849 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
1850 {
1851     if ( event.GetSetEnabled() )
1852         Enable(event.GetEnabled());
1853
1854 #if wxUSE_CONTROLS
1855     if ( event.GetSetText() )
1856     {
1857         wxControl *control = wxDynamicCastThis(wxControl);
1858         if ( control )
1859         {
1860             if ( event.GetText() != control->GetLabel() )
1861                 control->SetLabel(event.GetText());
1862         }
1863 #if wxUSE_CHECKBOX
1864         wxCheckBox *checkbox = wxDynamicCastThis(wxCheckBox);
1865         if ( checkbox )
1866         {
1867             if ( event.GetSetChecked() )
1868                 checkbox->SetValue(event.GetChecked());
1869         }
1870 #endif // wxUSE_CHECKBOX
1871
1872 #if wxUSE_RADIOBTN
1873         wxRadioButton *radiobtn = wxDynamicCastThis(wxRadioButton);
1874         if ( radiobtn )
1875         {
1876             if ( event.GetSetChecked() )
1877                 radiobtn->SetValue(event.GetChecked());
1878         }
1879 #endif // wxUSE_RADIOBTN
1880     }
1881 #endif
1882 }
1883
1884 #if 0
1885 // call internal idle recursively
1886 // may be obsolete (wait until OnIdle scheme stabilises)
1887 void wxWindowBase::ProcessInternalIdle()
1888 {
1889     OnInternalIdle();
1890
1891     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1892     while (node)
1893     {
1894         wxWindow *child = node->GetData();
1895         child->ProcessInternalIdle();
1896         node = node->GetNext();
1897     }
1898 }
1899 #endif
1900
1901 // ----------------------------------------------------------------------------
1902 // dialog units translations
1903 // ----------------------------------------------------------------------------
1904
1905 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
1906 {
1907     int charWidth = GetCharWidth();
1908     int charHeight = GetCharHeight();
1909     wxPoint pt2(-1, -1);
1910     if (pt.x != -1)
1911         pt2.x = (int) ((pt.x * 4) / charWidth) ;
1912     if (pt.y != -1)
1913         pt2.y = (int) ((pt.y * 8) / charHeight) ;
1914
1915     return pt2;
1916 }
1917
1918 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
1919 {
1920     int charWidth = GetCharWidth();
1921     int charHeight = GetCharHeight();
1922     wxPoint pt2(-1, -1);
1923     if (pt.x != -1)
1924         pt2.x = (int) ((pt.x * charWidth) / 4) ;
1925     if (pt.y != -1)
1926         pt2.y = (int) ((pt.y * charHeight) / 8) ;
1927
1928     return pt2;
1929 }
1930
1931 // ----------------------------------------------------------------------------
1932 // event handlers
1933 // ----------------------------------------------------------------------------
1934
1935 // propagate the colour change event to the subwindows
1936 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
1937 {
1938     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1939     while ( node )
1940     {
1941         // Only propagate to non-top-level windows
1942         wxWindow *win = node->GetData();
1943         if ( !win->IsTopLevel() )
1944         {
1945             wxSysColourChangedEvent event2;
1946             event.m_eventObject = win;
1947             win->GetEventHandler()->ProcessEvent(event2);
1948         }
1949
1950         node = node->GetNext();
1951     }
1952 }
1953
1954 // the default action is to populate dialog with data when it's created,
1955 // and nudge the UI into displaying itself correctly in case
1956 // we've turned the wxUpdateUIEvents frequency down low.
1957 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
1958 {
1959     TransferDataToWindow();
1960
1961     // Update the UI at this point
1962     UpdateWindowUI(wxUPDATE_UI_RECURSE);
1963 }
1964
1965 // process Ctrl-Alt-mclick
1966 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
1967 {
1968 #if wxUSE_MSGDLG
1969     if ( event.ControlDown() && event.AltDown() )
1970     {
1971         // don't translate these strings
1972         wxString port;
1973
1974 #ifdef __WXUNIVERSAL__
1975         port = _T("Univ/");
1976 #endif // __WXUNIVERSAL__
1977
1978         switch ( wxGetOsVersion() )
1979         {
1980             case wxMOTIF_X:     port += _T("Motif"); break;
1981             case wxMAC:
1982             case wxMAC_DARWIN:  port += _T("Mac"); break;
1983             case wxBEOS:        port += _T("BeOS"); break;
1984             case wxGTK:
1985             case wxGTK_WIN32:
1986             case wxGTK_OS2:
1987             case wxGTK_BEOS:    port += _T("GTK"); break;
1988             case wxWINDOWS:
1989             case wxPENWINDOWS:
1990             case wxWINDOWS_NT:
1991             case wxWIN32S:
1992             case wxWIN95:
1993             case wxWIN386:      port += _T("MS Windows"); break;
1994             case wxMGL_UNIX:
1995             case wxMGL_X:
1996             case wxMGL_WIN32:
1997             case wxMGL_OS2:     port += _T("MGL"); break;
1998             case wxWINDOWS_OS2:
1999             case wxOS2_PM:      port += _T("OS/2"); break;
2000             default:            port += _T("unknown"); break;
2001         }
2002
2003         wxMessageBox(wxString::Format(
2004                                       _T(
2005                                         "       wxWindows Library (%s port)\nVersion %u.%u.%u%s, compiled at %s %s\n   Copyright (c) 1995-2002 wxWindows team"
2006                                         ),
2007                                       port.c_str(),
2008                                       wxMAJOR_VERSION,
2009                                       wxMINOR_VERSION,
2010                                       wxRELEASE_NUMBER,
2011 #if wxUSE_UNICODE
2012                                       L" (Unicode)",
2013 #else
2014                                       "",
2015 #endif
2016                                       __TDATE__,
2017                                       __TTIME__
2018                                      ),
2019                      _T("wxWindows information"),
2020                      wxICON_INFORMATION | wxOK,
2021                      (wxWindow *)this);
2022     }
2023     else
2024 #endif // wxUSE_MSGDLG
2025     {
2026         event.Skip();
2027     }
2028 }
2029
2030 // ----------------------------------------------------------------------------
2031 // accessibility
2032 // ----------------------------------------------------------------------------
2033
2034 #if wxUSE_ACCESSIBILITY
2035 void wxWindowBase::SetAccessible(wxAccessible* accessible)
2036 {
2037     if (m_accessible && (accessible != m_accessible))
2038         delete m_accessible;
2039     m_accessible = accessible;
2040     if (m_accessible)
2041         m_accessible->SetWindow((wxWindow*) this);
2042 }
2043
2044 // Returns the accessible object, creating if necessary.
2045 wxAccessible* wxWindowBase::GetOrCreateAccessible()
2046 {
2047     if (!m_accessible)
2048         m_accessible = CreateAccessible();
2049     return m_accessible;
2050 }
2051
2052 // Override to create a specific accessible object.
2053 wxAccessible* wxWindowBase::CreateAccessible()
2054 {
2055     return new wxWindowAccessible((wxWindow*) this);
2056 }
2057
2058 #endif
2059
2060 #if !wxUSE_STL
2061 // ----------------------------------------------------------------------------
2062 // list classes implementation
2063 // ----------------------------------------------------------------------------
2064
2065 void wxWindowListNode::DeleteData()
2066 {
2067     delete (wxWindow *)GetData();
2068 }
2069 #endif
2070
2071 // ----------------------------------------------------------------------------
2072 // borders
2073 // ----------------------------------------------------------------------------
2074
2075 wxBorder wxWindowBase::GetBorder(long flags) const
2076 {
2077     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
2078     if ( border == wxBORDER_DEFAULT )
2079     {
2080         border = GetDefaultBorder();
2081     }
2082
2083     return border;
2084 }
2085
2086 wxBorder wxWindowBase::GetDefaultBorder() const
2087 {
2088     return wxBORDER_NONE;
2089 }
2090
2091 // ----------------------------------------------------------------------------
2092 // hit testing
2093 // ----------------------------------------------------------------------------
2094
2095 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
2096 {
2097     // here we just check if the point is inside the window or not
2098
2099     // check the top and left border first
2100     bool outside = x < 0 || y < 0;
2101     if ( !outside )
2102     {
2103         // check the right and bottom borders too
2104         wxSize size = GetSize();
2105         outside = x >= size.x || y >= size.y;
2106     }
2107
2108     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
2109 }
2110
2111 // ----------------------------------------------------------------------------
2112 // mouse capture
2113 // ----------------------------------------------------------------------------
2114
2115 struct WXDLLEXPORT wxWindowNext
2116 {
2117     wxWindow *win;
2118     wxWindowNext *next;
2119 } *wxWindowBase::ms_winCaptureNext = NULL;
2120
2121 void wxWindowBase::CaptureMouse()
2122 {
2123     wxLogTrace(_T("mousecapture"), _T("CaptureMouse(%p)"), this);
2124
2125     wxWindow *winOld = GetCapture();
2126     if ( winOld )
2127     {
2128         ((wxWindowBase*) winOld)->DoReleaseMouse();
2129
2130         // save it on stack
2131         wxWindowNext *item = new wxWindowNext;
2132         item->win = winOld;
2133         item->next = ms_winCaptureNext;
2134         ms_winCaptureNext = item;
2135     }
2136     //else: no mouse capture to save
2137
2138     DoCaptureMouse();
2139 }
2140
2141 void wxWindowBase::ReleaseMouse()
2142 {
2143     wxLogTrace(_T("mousecapture"), _T("ReleaseMouse(%p)"), this);
2144
2145     wxASSERT_MSG( GetCapture() == this, wxT("attempt to release mouse, but this window hasn't captured it") );
2146
2147     DoReleaseMouse();
2148
2149     if ( ms_winCaptureNext )
2150     {
2151         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
2152
2153         wxWindowNext *item = ms_winCaptureNext;
2154         ms_winCaptureNext = item->next;
2155         delete item;
2156     }
2157     //else: stack is empty, no previous capture
2158
2159     wxLogTrace(_T("mousecapture"),
2160         (const wxChar *) _T("After ReleaseMouse() mouse is captured by %p"),
2161         GetCapture());
2162 }
2163
2164 #if wxUSE_HOTKEY
2165
2166 bool
2167 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
2168                              int WXUNUSED(modifiers),
2169                              int WXUNUSED(keycode))
2170 {
2171     // not implemented
2172     return false;
2173 }
2174
2175 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
2176 {
2177     // not implemented
2178     return false;
2179 }
2180
2181 #endif // wxUSE_HOTKEY
2182
2183 void wxWindowBase::SendDestroyEvent()
2184 {
2185     wxWindowDestroyEvent event;
2186     event.SetEventObject(this);
2187     event.SetId(GetId());
2188     GetEventHandler()->ProcessEvent(event);
2189 }
2190
2191 // ----------------------------------------------------------------------------
2192 // event processing
2193 // ----------------------------------------------------------------------------
2194
2195 bool wxWindowBase::TryValidator(wxEvent& wxVALIDATOR_PARAM(event))
2196 {
2197 #if wxUSE_VALIDATORS
2198     // Can only use the validator of the window which
2199     // is receiving the event
2200     if ( event.GetEventObject() == this )
2201     {
2202         wxValidator *validator = GetValidator();
2203         if ( validator && validator->ProcessEvent(event) )
2204         {
2205             return true;
2206         }
2207     }
2208 #endif // wxUSE_VALIDATORS
2209
2210     return false;
2211 }
2212
2213 bool wxWindowBase::TryParent(wxEvent& event)
2214 {
2215     // carry on up the parent-child hierarchy if the propgation count hasn't
2216     // reached zero yet
2217     if ( event.ShouldPropagate() )
2218     {
2219         // honour the requests to stop propagation at this window: this is
2220         // used by the dialogs, for example, to prevent processing the events
2221         // from the dialog controls in the parent frame which rarely, if ever,
2222         // makes sense
2223         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
2224         {
2225             wxWindow *parent = GetParent();
2226             if ( parent && !parent->IsBeingDeleted() )
2227             {
2228                 wxPropagateOnce propagateOnce(event);
2229
2230                 return parent->GetEventHandler()->ProcessEvent(event);
2231             }
2232         }
2233     }
2234
2235     return wxEvtHandler::TryParent(event);
2236 }
2237
2238 // ----------------------------------------------------------------------------
2239 // global functions
2240 // ----------------------------------------------------------------------------
2241
2242 wxWindow* wxGetTopLevelParent(wxWindow *win)
2243 {
2244     while ( win && !win->IsTopLevel() )
2245          win = win->GetParent();
2246
2247     return win;
2248 }
2249
2250 #if wxUSE_ACCESSIBILITY
2251 // ----------------------------------------------------------------------------
2252 // accessible object for windows
2253 // ----------------------------------------------------------------------------
2254
2255 // Can return either a child object, or an integer
2256 // representing the child element, starting from 1.
2257 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
2258 {
2259     wxASSERT( GetWindow() != NULL );
2260     if (!GetWindow())
2261         return wxACC_FAIL;
2262
2263     return wxACC_NOT_IMPLEMENTED;
2264 }
2265
2266 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
2267 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
2268 {
2269     wxASSERT( GetWindow() != NULL );
2270     if (!GetWindow())
2271         return wxACC_FAIL;
2272
2273     wxWindow* win = NULL;
2274     if (elementId == 0)
2275     {
2276         win = GetWindow();
2277     }
2278     else
2279     {
2280         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
2281         {
2282             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
2283         }
2284         else
2285             return wxACC_FAIL;
2286     }
2287     if (win)
2288     {
2289         rect = win->GetRect();
2290         if (win->GetParent() && !win->IsKindOf(CLASSINFO(wxTopLevelWindow)))
2291             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
2292         return wxACC_OK;
2293     }
2294
2295     return wxACC_NOT_IMPLEMENTED;
2296 }
2297
2298 // Navigates from fromId to toId/toObject.
2299 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
2300                              int* WXUNUSED(toId), wxAccessible** toObject)
2301 {
2302     wxASSERT( GetWindow() != NULL );
2303     if (!GetWindow())
2304         return wxACC_FAIL;
2305
2306     switch (navDir)
2307     {
2308     case wxNAVDIR_FIRSTCHILD:
2309         {
2310             if (GetWindow()->GetChildren().GetCount() == 0)
2311                 return wxACC_FALSE;
2312             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
2313             *toObject = childWindow->GetOrCreateAccessible();
2314
2315             return wxACC_OK;
2316         }
2317     case wxNAVDIR_LASTCHILD:
2318         {
2319             if (GetWindow()->GetChildren().GetCount() == 0)
2320                 return wxACC_FALSE;
2321             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
2322             *toObject = childWindow->GetOrCreateAccessible();
2323
2324             return wxACC_OK;
2325         }
2326     case wxNAVDIR_RIGHT:
2327     case wxNAVDIR_DOWN:
2328     case wxNAVDIR_NEXT:
2329         {
2330             wxWindowList::compatibility_iterator node =
2331                 wxWindowList::compatibility_iterator();
2332             if (fromId == 0)
2333             {
2334                 // Can't navigate to sibling of this window
2335                 // if we're a top-level window.
2336                 if (!GetWindow()->GetParent())
2337                     return wxACC_NOT_IMPLEMENTED;
2338
2339                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
2340             }
2341             else
2342             {
2343                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
2344                     node = GetWindow()->GetChildren().Item(fromId-1);
2345             }
2346
2347             if (node && node->GetNext())
2348             {
2349                 wxWindow* nextWindow = node->GetNext()->GetData();
2350                 *toObject = nextWindow->GetOrCreateAccessible();
2351                 return wxACC_OK;
2352             }
2353             else
2354                 return wxACC_FALSE;
2355         }
2356     case wxNAVDIR_LEFT:
2357     case wxNAVDIR_UP:
2358     case wxNAVDIR_PREVIOUS:
2359         {
2360             wxWindowList::compatibility_iterator node =
2361                 wxWindowList::compatibility_iterator();
2362             if (fromId == 0)
2363             {
2364                 // Can't navigate to sibling of this window
2365                 // if we're a top-level window.
2366                 if (!GetWindow()->GetParent())
2367                     return wxACC_NOT_IMPLEMENTED;
2368
2369                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
2370             }
2371             else
2372             {
2373                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
2374                     node = GetWindow()->GetChildren().Item(fromId-1);
2375             }
2376
2377             if (node && node->GetPrevious())
2378             {
2379                 wxWindow* previousWindow = node->GetPrevious()->GetData();
2380                 *toObject = previousWindow->GetOrCreateAccessible();
2381                 return wxACC_OK;
2382             }
2383             else
2384                 return wxACC_FALSE;
2385         }
2386     }
2387
2388     return wxACC_NOT_IMPLEMENTED;
2389 }
2390
2391 // Gets the name of the specified object.
2392 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
2393 {
2394     wxASSERT( GetWindow() != NULL );
2395     if (!GetWindow())
2396         return wxACC_FAIL;
2397
2398     wxString title;
2399
2400     // If a child, leave wxWindows to call the function on the actual
2401     // child object.
2402     if (childId > 0)
2403         return wxACC_NOT_IMPLEMENTED;
2404
2405     // This will eventually be replaced by specialised
2406     // accessible classes, one for each kind of wxWindows
2407     // control or window.
2408     if (GetWindow()->IsKindOf(CLASSINFO(wxButton)))
2409         title = ((wxButton*) GetWindow())->GetLabel();
2410     else
2411         title = GetWindow()->GetName();
2412
2413     if (!title.IsEmpty())
2414     {
2415         *name = title;
2416         return wxACC_OK;
2417     }
2418     else
2419         return wxACC_NOT_IMPLEMENTED;
2420 }
2421
2422 // Gets the number of children.
2423 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
2424 {
2425     wxASSERT( GetWindow() != NULL );
2426     if (!GetWindow())
2427         return wxACC_FAIL;
2428
2429     *childId = (int) GetWindow()->GetChildren().GetCount();
2430     return wxACC_OK;
2431 }
2432
2433 // Gets the specified child (starting from 1).
2434 // If *child is NULL and return value is wxACC_OK,
2435 // this means that the child is a simple element and
2436 // not an accessible object.
2437 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
2438 {
2439     wxASSERT( GetWindow() != NULL );
2440     if (!GetWindow())
2441         return wxACC_FAIL;
2442
2443     if (childId == 0)
2444     {
2445         *child = this;
2446         return wxACC_OK;
2447     }
2448
2449     if (childId > (int) GetWindow()->GetChildren().GetCount())
2450         return wxACC_FAIL;
2451
2452     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
2453     *child = childWindow->GetOrCreateAccessible();
2454     if (*child)
2455         return wxACC_OK;
2456     else
2457         return wxACC_FAIL;
2458 }
2459
2460 // Gets the parent, or NULL.
2461 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
2462 {
2463     wxASSERT( GetWindow() != NULL );
2464     if (!GetWindow())
2465         return wxACC_FAIL;
2466
2467     wxWindow* parentWindow = GetWindow()->GetParent();
2468     if (!parentWindow)
2469     {
2470         *parent = NULL;
2471         return wxACC_OK;
2472     }
2473     else
2474     {
2475         *parent = parentWindow->GetOrCreateAccessible();
2476         if (*parent)
2477             return wxACC_OK;
2478         else
2479             return wxACC_FAIL;
2480     }
2481 }
2482
2483 // Performs the default action. childId is 0 (the action for this object)
2484 // or > 0 (the action for a child).
2485 // Return wxACC_NOT_SUPPORTED if there is no default action for this
2486 // window (e.g. an edit control).
2487 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
2488 {
2489     wxASSERT( GetWindow() != NULL );
2490     if (!GetWindow())
2491         return wxACC_FAIL;
2492
2493     return wxACC_NOT_IMPLEMENTED;
2494 }
2495
2496 // Gets the default action for this object (0) or > 0 (the action for a child).
2497 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
2498 // string if there is no action.
2499 // The retrieved string describes the action that is performed on an object,
2500 // not what the object does as a result. For example, a toolbar button that prints
2501 // a document has a default action of "Press" rather than "Prints the current document."
2502 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
2503 {
2504     wxASSERT( GetWindow() != NULL );
2505     if (!GetWindow())
2506         return wxACC_FAIL;
2507
2508     return wxACC_NOT_IMPLEMENTED;
2509 }
2510
2511 // Returns the description for this object or a child.
2512 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
2513 {
2514     wxASSERT( GetWindow() != NULL );
2515     if (!GetWindow())
2516         return wxACC_FAIL;
2517
2518     wxString ht(GetWindow()->GetHelpText());
2519     if (!ht.IsEmpty())
2520     {
2521         *description = ht;
2522         return wxACC_OK;
2523     }
2524     return wxACC_NOT_IMPLEMENTED;
2525 }
2526
2527 // Returns help text for this object or a child, similar to tooltip text.
2528 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
2529 {
2530     wxASSERT( GetWindow() != NULL );
2531     if (!GetWindow())
2532         return wxACC_FAIL;
2533
2534     wxString ht(GetWindow()->GetHelpText());
2535     if (!ht.IsEmpty())
2536     {
2537         *helpText = ht;
2538         return wxACC_OK;
2539     }
2540     return wxACC_NOT_IMPLEMENTED;
2541 }
2542
2543 // Returns the keyboard shortcut for this object or child.
2544 // Return e.g. ALT+K
2545 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
2546 {
2547     wxASSERT( GetWindow() != NULL );
2548     if (!GetWindow())
2549         return wxACC_FAIL;
2550
2551     return wxACC_NOT_IMPLEMENTED;
2552 }
2553
2554 // Returns a role constant.
2555 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
2556 {
2557     wxASSERT( GetWindow() != NULL );
2558     if (!GetWindow())
2559         return wxACC_FAIL;
2560
2561     // If a child, leave wxWindows to call the function on the actual
2562     // child object.
2563     if (childId > 0)
2564         return wxACC_NOT_IMPLEMENTED;
2565
2566     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
2567         return wxACC_NOT_IMPLEMENTED;
2568 #if wxUSE_STATUSBAR
2569     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
2570         return wxACC_NOT_IMPLEMENTED;
2571 #endif
2572 #if wxUSE_TOOLBAR
2573     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
2574         return wxACC_NOT_IMPLEMENTED;
2575 #endif
2576
2577     //*role = wxROLE_SYSTEM_CLIENT;
2578     *role = wxROLE_SYSTEM_CLIENT;
2579     return wxACC_OK;
2580
2581     #if 0
2582     return wxACC_NOT_IMPLEMENTED;
2583     #endif
2584 }
2585
2586 // Returns a state constant.
2587 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
2588 {
2589     wxASSERT( GetWindow() != NULL );
2590     if (!GetWindow())
2591         return wxACC_FAIL;
2592
2593     // If a child, leave wxWindows to call the function on the actual
2594     // child object.
2595     if (childId > 0)
2596         return wxACC_NOT_IMPLEMENTED;
2597
2598     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
2599         return wxACC_NOT_IMPLEMENTED;
2600
2601 #if wxUSE_STATUSBAR
2602     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
2603         return wxACC_NOT_IMPLEMENTED;
2604 #endif
2605 #if wxUSE_TOOLBAR
2606     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
2607         return wxACC_NOT_IMPLEMENTED;
2608 #endif
2609
2610     *state = 0;
2611     return wxACC_OK;
2612
2613     #if 0
2614     return wxACC_NOT_IMPLEMENTED;
2615     #endif
2616 }
2617
2618 // Returns a localized string representing the value for the object
2619 // or child.
2620 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
2621 {
2622     wxASSERT( GetWindow() != NULL );
2623     if (!GetWindow())
2624         return wxACC_FAIL;
2625
2626     return wxACC_NOT_IMPLEMENTED;
2627 }
2628
2629 // Selects the object or child.
2630 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
2631 {
2632     wxASSERT( GetWindow() != NULL );
2633     if (!GetWindow())
2634         return wxACC_FAIL;
2635
2636     return wxACC_NOT_IMPLEMENTED;
2637 }
2638
2639 // Gets the window with the keyboard focus.
2640 // If childId is 0 and child is NULL, no object in
2641 // this subhierarchy has the focus.
2642 // If this object has the focus, child should be 'this'.
2643 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
2644 {
2645     wxASSERT( GetWindow() != NULL );
2646     if (!GetWindow())
2647         return wxACC_FAIL;
2648
2649     return wxACC_NOT_IMPLEMENTED;
2650 }
2651
2652 // Gets a variant representing the selected children
2653 // of this object.
2654 // Acceptable values:
2655 // - a null variant (IsNull() returns TRUE)
2656 // - a list variant (GetType() == wxT("list")
2657 // - an integer representing the selected child element,
2658 //   or 0 if this object is selected (GetType() == wxT("long")
2659 // - a "void*" pointer to a wxAccessible child object
2660 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
2661 {
2662     wxASSERT( GetWindow() != NULL );
2663     if (!GetWindow())
2664         return wxACC_FAIL;
2665
2666     return wxACC_NOT_IMPLEMENTED;
2667 }
2668
2669 #endif // wxUSE_ACCESSIBILITY