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 license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  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/textctrl.h"
  42     #include "wx/settings.h"
  43     #include "wx/dialog.h"
  44     #include "wx/msgdlg.h"
  45     #include "wx/statusbr.h"
  46 #endif //WX_PRECOMP
  47
  48 #if wxUSE_CONSTRAINTS
  49     #include "wx/layout.h"
  50 #endif // wxUSE_CONSTRAINTS
  51
  52 #include "wx/sizer.h"
  53
  54 #if wxUSE_DRAG_AND_DROP
  55     #include "wx/dnd.h"
  56 #endif // wxUSE_DRAG_AND_DROP
  57
  58 #if wxUSE_HELP
  59     #include "wx/cshelp.h"
  60 #endif // wxUSE_HELP
  61
  62 #if wxUSE_TOOLTIPS
  63     #include "wx/tooltip.h"
  64 #endif // wxUSE_TOOLTIPS
  65
  66 #if wxUSE_CARET
  67     #include "wx/caret.h"
  68 #endif // wxUSE_CARET
  69
  70 // ----------------------------------------------------------------------------
  71 // static data
  72 // ----------------------------------------------------------------------------
  73
  74 int wxWindowBase::ms_lastControlId = -200;
  75
  76 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  77
  78 // ----------------------------------------------------------------------------
  79 // event table
  80 // ----------------------------------------------------------------------------
  81
  82 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  83     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  84     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  85     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
  86
  87 #if wxUSE_HELP
  88     EVT_HELP(-1, wxWindowBase::OnHelp)
  89 #endif // wxUSE_HELP
  90
  91 END_EVENT_TABLE()
  92
  93 // ============================================================================
  94 // implementation of the common functionality of the wxWindow class
  95 // ============================================================================
  96
  97 // ----------------------------------------------------------------------------
  98 // initialization
  99 // ----------------------------------------------------------------------------
 100
 101 // the default initialization
 102 void wxWindowBase::InitBase()
 103 {
 104     // no window yet, no parent nor children
 105     m_parent = (wxWindow *)NULL;
 106     m_windowId = -1;
 107     m_children.DeleteContents( FALSE ); // don't auto delete node data
 108
 109     // no constraints on the minimal window size
 110     m_minWidth =
 111     m_minHeight =
 112     m_maxWidth =
 113     m_maxHeight = -1;
 114
 115     // window is created enabled but it's not visible yet
 116     m_isShown = FALSE;
 117     m_isEnabled = TRUE;
 118
 119     // the default event handler is just this window
 120     m_eventHandler = this;
 121
 122 #if wxUSE_VALIDATORS
 123     // no validator
 124     m_windowValidator = (wxValidator *) NULL;
 125 #endif // wxUSE_VALIDATORS
 126
 127     // use the system default colours
 128     m_backgroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
 129     m_foregroundColour = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
 130
 131     // don't set the font here for wxMSW as we don't call WM_SETFONT here and
 132     // so the font is *not* really set - but calls to SetFont() later won't do
 133     // anything because m_font appears to be already set!
 134 #ifndef __WXMSW__
 135     m_font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
 136 #endif // __WXMSW__
 137
 138     // the colours/fonts are default for now
 139     m_hasBgCol =
 140     m_hasFgCol =
 141     m_hasFont = FALSE;
 142
 143     // no style bits
 144     m_exStyle =
 145     m_windowStyle = 0;
 146
 147     // an optimization for the event processing: checking this flag is much
 148     // faster than using IsKindOf(CLASSINFO(wxWindow))
 149     m_isWindow = TRUE;
 150
 151 #if wxUSE_CONSTRAINTS
 152     // no constraints whatsoever
 153     m_constraints = (wxLayoutConstraints *) NULL;
 154     m_constraintsInvolvedIn = (wxWindowList *) NULL;
 155 #endif // wxUSE_CONSTRAINTS
 156
 157     m_windowSizer = (wxSizer *) NULL;
 158     m_containingSizer = (wxSizer *) NULL;
 159     m_autoLayout = FALSE;
 160
 161 #if wxUSE_DRAG_AND_DROP
 162     m_dropTarget = (wxDropTarget *)NULL;
 163 #endif // wxUSE_DRAG_AND_DROP
 164
 165 #if wxUSE_TOOLTIPS
 166     m_tooltip = (wxToolTip *)NULL;
 167 #endif // wxUSE_TOOLTIPS
 168
 169 #if wxUSE_CARET
 170     m_caret = (wxCaret *)NULL;
 171 #endif // wxUSE_CARET
 172
 173 #if wxUSE_PALETTE
 174     m_hasCustomPalette = FALSE;
 175 #endif // wxUSE_PALETTE
 176
 177     m_virtualSize = wxDefaultSize;
 178
 179     m_minVirtualWidth =
 180     m_minVirtualHeight =
 181     m_maxVirtualWidth =
 182     m_maxVirtualHeight = -1;
 183
 184     // Whether we're using the current theme for this window (wxGTK only for now)
 185     m_themeEnabled = FALSE;
 186 }
 187
 188 // common part of window creation process
 189 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 190                               wxWindowID id,
 191                               const wxPoint& WXUNUSED(pos),
 192                               const wxSize& WXUNUSED(size),
 193                               long style,
 194                               const wxValidator& validator,
 195                               const wxString& name)
 196 {
 197     // m_isWindow is set to TRUE in wxWindowBase::Init() as well as many other
 198     // member variables - check that it has been called (will catch the case
 199     // when a new ctor is added which doesn't call InitWindow)
 200     wxASSERT_MSG( m_isWindow, wxT("Init() must have been called before!") );
 201
 202     // generate a new id if the user doesn't care about it
 203     m_windowId = id == -1 ? NewControlId() : id;
 204
 205     SetName(name);
 206     SetWindowStyleFlag(style);
 207     SetParent(parent);
 208
 209 #if wxUSE_VALIDATORS
 210     SetValidator(validator);
 211 #endif // wxUSE_VALIDATORS
 212
 213     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 214     // have it too - like this it's possible to set it only in the top level
 215     // dialog/frame and all children will inherit it by defult
 216     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 217     {
 218         SetExtraStyle(wxWS_EX_VALIDATE_RECURSIVELY);
 219     }
 220
 221     return TRUE;
 222 }
 223
 224 // ----------------------------------------------------------------------------
 225 // destruction
 226 // ----------------------------------------------------------------------------
 227
 228 // common clean up
 229 wxWindowBase::~wxWindowBase()
 230 {
 231     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 232
 233     // FIXME if these 2 cases result from programming errors in the user code
 234     //       we should probably assert here instead of silently fixing them
 235
 236     // Just in case the window has been Closed, but we're then deleting
 237     // immediately: don't leave dangling pointers.
 238     wxPendingDelete.DeleteObject(this);
 239
 240     // Just in case we've loaded a top-level window via LoadNativeDialog but
 241     // we weren't a dialog class
 242     wxTopLevelWindows.DeleteObject(this);
 243
 244     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 245
 246 #if wxUSE_CARET
 247     if ( m_caret )
 248         delete m_caret;
 249 #endif // wxUSE_CARET
 250
 251 #if wxUSE_VALIDATORS
 252     if ( m_windowValidator )
 253         delete m_windowValidator;
 254 #endif // wxUSE_VALIDATORS
 255
 256 #if wxUSE_CONSTRAINTS
 257     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 258     // at deleted windows as they delete themselves.
 259     DeleteRelatedConstraints();
 260
 261     if ( m_constraints )
 262     {
 263         // This removes any dangling pointers to this window in other windows'
 264         // constraintsInvolvedIn lists.
 265         UnsetConstraints(m_constraints);
 266         delete m_constraints;
 267         m_constraints = NULL;
 268     }
 269
 270 #endif // wxUSE_CONSTRAINTS
 271
 272     if ( m_containingSizer )
 273         m_containingSizer->Remove((wxWindow*)this);
 274
 275     if ( m_windowSizer )
 276         delete m_windowSizer;
 277
 278 #if wxUSE_DRAG_AND_DROP
 279     if ( m_dropTarget )
 280         delete m_dropTarget;
 281 #endif // wxUSE_DRAG_AND_DROP
 282
 283 #if wxUSE_TOOLTIPS
 284     if ( m_tooltip )
 285         delete m_tooltip;
 286 #endif // wxUSE_TOOLTIPS
 287
 288     // reset the dangling pointer our parent window may keep to us
 289     if ( m_parent && m_parent->GetDefaultItem() == this )
 290     {
 291         m_parent->SetDefaultItem(NULL);
 292     }
 293 }
 294
 295 bool wxWindowBase::Destroy()
 296 {
 297     delete this;
 298
 299     return TRUE;
 300 }
 301
 302 bool wxWindowBase::Close(bool force)
 303 {
 304     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 305     event.SetEventObject(this);
 306 #if WXWIN_COMPATIBILITY
 307     event.SetForce(force);
 308 #endif // WXWIN_COMPATIBILITY
 309     event.SetCanVeto(!force);
 310
 311     // return FALSE if window wasn't closed because the application vetoed the
 312     // close event
 313     return GetEventHandler()->ProcessEvent(event) && !event.GetVeto();
 314 }
 315
 316 bool wxWindowBase::DestroyChildren()
 317 {
 318     wxWindowList::Node *node;
 319     for ( ;; )
 320     {
 321         // we iterate until the list becomes empty
 322         node = GetChildren().GetFirst();
 323         if ( !node )
 324             break;
 325
 326         wxWindow *child = node->GetData();
 327
 328         wxASSERT_MSG( child, wxT("children list contains empty nodes") );
 329
 330         child->Show(FALSE);
 331         delete child;
 332
 333         wxASSERT_MSG( !GetChildren().Find(child),
 334                       wxT("child didn't remove itself using RemoveChild()") );
 335     }
 336
 337     return TRUE;
 338 }
 339
 340 // ----------------------------------------------------------------------------
 341 // size/position related methods
 342 // ----------------------------------------------------------------------------
 343
 344 // centre the window with respect to its parent in either (or both) directions
 345 void wxWindowBase::Centre(int direction)
 346 {
 347     // the position/size of the parent window or of the entire screen
 348     wxPoint posParent;
 349     int widthParent, heightParent;
 350
 351     wxWindow *parent = NULL;
 352
 353     if ( !(direction & wxCENTRE_ON_SCREEN) )
 354     {
 355         // find the parent to centre this window on: it should be the
 356         // immediate parent for the controls but the top level parent for the
 357         // top level windows (like dialogs)
 358         parent = GetParent();
 359         if ( IsTopLevel() )
 360         {
 361             while ( parent && !parent->IsTopLevel() )
 362             {
 363                 parent = parent->GetParent();
 364             }
 365         }
 366
 367         // did we find the parent?
 368         if ( !parent )
 369         {
 370             // no other choice
 371             direction |= wxCENTRE_ON_SCREEN;
 372         }
 373     }
 374
 375     if ( direction & wxCENTRE_ON_SCREEN )
 376     {
 377         // centre with respect to the whole screen
 378         wxDisplaySize(&widthParent, &heightParent);
 379     }
 380     else
 381     {
 382         if ( IsTopLevel() )
 383         {
 384             // centre on the parent
 385             parent->GetSize(&widthParent, &heightParent);
 386
 387             // adjust to the parents position
 388             posParent = parent->GetPosition();
 389         }
 390         else
 391         {
 392             // centre inside the parents client rectangle
 393             parent->GetClientSize(&widthParent, &heightParent);
 394         }
 395     }
 396
 397     int width, height;
 398     GetSize(&width, &height);
 399
 400     int xNew = -1,
 401         yNew = -1;
 402
 403     if ( direction & wxHORIZONTAL )
 404         xNew = (widthParent - width)/2;
 405
 406     if ( direction & wxVERTICAL )
 407         yNew = (heightParent - height)/2;
 408
 409     xNew += posParent.x;
 410     yNew += posParent.y;
 411
 412     // Base size of the visible dimensions of the display
 413     // to take into account the taskbar
 414     wxRect rect = wxGetClientDisplayRect();
 415     wxSize size (rect.width,rect.height);
 416
 417     // NB: in wxMSW, negative position may not neccessary mean "out of screen",
 418     //     but it may mean that the window is placed on other than the main
 419     //     display. Therefore we only make sure centered window is on the main display
 420     //     if the parent is at least partially present here.
 421     if (posParent.x + widthParent >= 0)  // if parent is (partially) on the main display
 422     {
 423         if (xNew < 0)
 424             xNew = 0;
 425         else if (xNew+width > size.x)
 426             xNew = size.x-width-1;
 427     }
 428     if (posParent.y + heightParent >= 0)  // if parent is (partially) on the main display
 429     {
 430         if (yNew+height > size.y)
 431             yNew = size.y-height-1;
 432
 433         // Make certain that the title bar is initially visible
 434         // always, even if this would push the bottom of the
 435         // dialog of the visible area of the display
 436         if (yNew < 0)
 437             yNew = 0;
 438     }
 439
 440     // move the window to this position (keeping the old size but using
 441     // SetSize() and not Move() to allow xNew and/or yNew to be -1)
 442     SetSize(xNew, yNew, width, height, wxSIZE_ALLOW_MINUS_ONE);
 443 }
 444
 445 // fits the window around the children
 446 void wxWindowBase::Fit()
 447 {
 448     if ( GetChildren().GetCount() > 0 )
 449     {
 450         SetClientSize(DoGetBestSize());
 451     }
 452     //else: do nothing if we have no children
 453 }
 454
 455 // return the size best suited for the current window
 456 wxSize wxWindowBase::DoGetBestSize() const
 457 {
 458     if ( m_windowSizer )
 459     {
 460         return m_windowSizer->GetMinSize();
 461     }
 462 #if wxUSE_CONSTRAINTS
 463     else if ( m_constraints )
 464     {
 465         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 466
 467         // our minimal acceptable size is such that all our windows fit inside
 468         int maxX = 0,
 469             maxY = 0;
 470
 471         for ( wxWindowList::Node *node = GetChildren().GetFirst();
 472               node;
 473               node = node->GetNext() )
 474         {
 475             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 476             if ( !c )
 477             {
 478                 // it's not normal that we have an unconstrained child, but
 479                 // what can we do about it?
 480                 continue;
 481             }
 482
 483             int x = c->right.GetValue(),
 484                 y = c->bottom.GetValue();
 485
 486             if ( x > maxX )
 487                 maxX = x;
 488
 489             if ( y > maxY )
 490                 maxY = y;
 491
 492             // TODO: we must calculate the overlaps somehow, otherwise we
 493             //       will never return a size bigger than the current one :-(
 494         }
 495
 496         return wxSize(maxX, maxY);
 497     }
 498 #endif // wxUSE_CONSTRAINTS
 499     else if ( GetChildren().GetCount() > 0 )
 500     {
 501         // our minimal acceptable size is such that all our windows fit inside
 502         int maxX = 0,
 503             maxY = 0;
 504
 505         for ( wxWindowList::Node *node = GetChildren().GetFirst();
 506               node;
 507               node = node->GetNext() )
 508         {
 509             wxWindow *win = node->GetData();
 510             if ( win->IsTopLevel()
 511 #if wxUSE_STATUSBAR
 512                     || wxDynamicCast(win, wxStatusBar)
 513 #endif // wxUSE_STATUSBAR
 514                )
 515             {
 516                 // dialogs and frames lie in different top level windows -
 517                 // don't deal with them here; as for the status bars, they
 518                 // don't lie in the client area at all
 519                 continue;
 520             }
 521
 522             int wx, wy, ww, wh;
 523             win->GetPosition(&wx, &wy);
 524
 525             // if the window hadn't been positioned yet, assume that it is in
 526             // the origin
 527             if ( wx == -1 )
 528                 wx = 0;
 529             if ( wy == -1 )
 530                 wy = 0;
 531
 532             win->GetSize(&ww, &wh);
 533             if ( wx + ww > maxX )
 534                 maxX = wx + ww;
 535             if ( wy + wh > maxY )
 536                 maxY = wy + wh;
 537         }
 538
 539         // for compatibility with the old versions and because it really looks
 540         // slightly more pretty like this, add a pad
 541         maxX += 7;
 542         maxY += 14;
 543
 544         return wxSize(maxX, maxY);
 545     }
 546     else
 547     {
 548         // for a generic window there is no natural best size - just use the
 549         // current one
 550         return GetSize();
 551     }
 552 }
 553
 554 // by default the origin is not shifted
 555 wxPoint wxWindowBase::GetClientAreaOrigin() const
 556 {
 557     return wxPoint(0, 0);
 558 }
 559
 560 // set the min/max size of the window
 561 void wxWindowBase::SetSizeHints(int minW, int minH,
 562                                 int maxW, int maxH,
 563                                 int WXUNUSED(incW), int WXUNUSED(incH))
 564 {
 565     m_minWidth = minW;
 566     m_maxWidth = maxW;
 567     m_minHeight = minH;
 568     m_maxHeight = maxH;
 569 }
 570
 571 void wxWindowBase::SetVirtualSizeHints( int minW, int minH,
 572                                         int maxW, int maxH )
 573 {
 574     m_minVirtualWidth = minW;
 575     m_maxVirtualWidth = maxW;
 576     m_minVirtualHeight = minH;
 577     m_maxVirtualHeight = maxH;
 578
 579     SetVirtualSize( GetClientSize() );
 580 }
 581
 582 void wxWindowBase::DoSetVirtualSize( int x, int y )
 583 {
 584     if ( m_minVirtualWidth != -1 && m_minVirtualWidth > x )
 585         x = m_minVirtualWidth;
 586     if ( m_maxVirtualWidth != -1 && m_maxVirtualWidth < x )
 587         x = m_maxVirtualWidth;
 588     if ( m_minVirtualHeight != -1 && m_minVirtualHeight > y )
 589         y = m_minVirtualHeight;
 590     if ( m_maxVirtualHeight != -1 && m_maxVirtualHeight < y )
 591         y = m_maxVirtualHeight;
 592
 593     m_virtualSize = wxSize(x, y);
 594 }
 595
 596 wxSize wxWindowBase::DoGetVirtualSize() const
 597 {
 598     wxSize  s( GetClientSize() );
 599
 600     if( m_virtualSize.GetWidth() != -1 )
 601         s.SetWidth( m_virtualSize.GetWidth() );
 602     if( m_virtualSize.GetHeight() != -1 )
 603         s.SetHeight( m_virtualSize.GetHeight() );
 604
 605     return s;
 606 }
 607
 608 // ----------------------------------------------------------------------------
 609 // show/hide/enable/disable the window
 610 // ----------------------------------------------------------------------------
 611
 612 bool wxWindowBase::Show(bool show)
 613 {
 614     if ( show != m_isShown )
 615     {
 616         m_isShown = show;
 617
 618         return TRUE;
 619     }
 620     else
 621     {
 622         return FALSE;
 623     }
 624 }
 625
 626 bool wxWindowBase::Enable(bool enable)
 627 {
 628     if ( enable != m_isEnabled )
 629     {
 630         m_isEnabled = enable;
 631
 632         return TRUE;
 633     }
 634     else
 635     {
 636         return FALSE;
 637     }
 638 }
 639 // ----------------------------------------------------------------------------
 640 // RTTI
 641 // ----------------------------------------------------------------------------
 642
 643 bool wxWindowBase::IsTopLevel() const
 644 {
 645     return FALSE;
 646 }
 647
 648 // ----------------------------------------------------------------------------
 649 // reparenting the window
 650 // ----------------------------------------------------------------------------
 651
 652 void wxWindowBase::AddChild(wxWindowBase *child)
 653 {
 654     wxCHECK_RET( child, wxT("can't add a NULL child") );
 655
 656     // this should never happen and it will lead to a crash later if it does
 657     // because RemoveChild() will remove only one node from the children list
 658     // and the other(s) one(s) will be left with dangling pointers in them
 659     wxASSERT_MSG( !GetChildren().Find(child), _T("AddChild() called twice") );
 660
 661     GetChildren().Append(child);
 662     child->SetParent(this);
 663 }
 664
 665 void wxWindowBase::RemoveChild(wxWindowBase *child)
 666 {
 667     wxCHECK_RET( child, wxT("can't remove a NULL child") );
 668
 669     GetChildren().DeleteObject(child);
 670     child->SetParent((wxWindow *)NULL);
 671 }
 672
 673 bool wxWindowBase::Reparent(wxWindowBase *newParent)
 674 {
 675     wxWindow *oldParent = GetParent();
 676     if ( newParent == oldParent )
 677     {
 678         // nothing done
 679         return FALSE;
 680     }
 681
 682     // unlink this window from the existing parent.
 683     if ( oldParent )
 684     {
 685         oldParent->RemoveChild(this);
 686     }
 687     else
 688     {
 689         wxTopLevelWindows.DeleteObject(this);
 690     }
 691
 692     // add it to the new one
 693     if ( newParent )
 694     {
 695         newParent->AddChild(this);
 696     }
 697     else
 698     {
 699         wxTopLevelWindows.Append(this);
 700     }
 701
 702     return TRUE;
 703 }
 704
 705 // ----------------------------------------------------------------------------
 706 // event handler stuff
 707 // ----------------------------------------------------------------------------
 708
 709 void wxWindowBase::PushEventHandler(wxEvtHandler *handler)
 710 {
 711     handler->SetNextHandler(GetEventHandler());
 712     SetEventHandler(handler);
 713 }
 714
 715 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
 716 {
 717     wxEvtHandler *handlerA = GetEventHandler();
 718     if ( handlerA )
 719     {
 720         wxEvtHandler *handlerB = handlerA->GetNextHandler();
 721         handlerA->SetNextHandler((wxEvtHandler *)NULL);
 722         SetEventHandler(handlerB);
 723         if ( deleteHandler )
 724         {
 725             delete handlerA;
 726             handlerA = (wxEvtHandler *)NULL;
 727         }
 728     }
 729
 730     return handlerA;
 731 }
 732
 733 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handler)
 734 {
 735     wxCHECK_MSG( handler, FALSE, _T("RemoveEventHandler(NULL) called") );
 736
 737     wxEvtHandler *handlerPrev = NULL,
 738                  *handlerCur = GetEventHandler();
 739     while ( handlerCur )
 740     {
 741         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
 742
 743         if ( handlerCur == handler )
 744         {
 745             if ( handlerPrev )
 746             {
 747                 handlerPrev->SetNextHandler(handlerNext);
 748             }
 749             else
 750             {
 751                 SetEventHandler(handlerNext);
 752             }
 753
 754             handler->SetNextHandler(NULL);
 755
 756             return TRUE;
 757         }
 758
 759         handlerPrev = handlerCur;
 760         handlerCur = handlerNext;
 761     }
 762
 763     wxFAIL_MSG( _T("where has the event handler gone?") );
 764
 765     return FALSE;
 766 }
 767
 768 // ----------------------------------------------------------------------------
 769 // cursors, fonts &c
 770 // ----------------------------------------------------------------------------
 771
 772 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
 773 {
 774     if ( !colour.Ok() || (colour == m_backgroundColour) )
 775         return FALSE;
 776
 777     m_backgroundColour = colour;
 778
 779     m_hasBgCol = TRUE;
 780
 781     return TRUE;
 782 }
 783
 784 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
 785 {
 786     if ( !colour.Ok() || (colour == m_foregroundColour) )
 787         return FALSE;
 788
 789     m_foregroundColour = colour;
 790
 791     m_hasFgCol = TRUE;
 792
 793     return TRUE;
 794 }
 795
 796 bool wxWindowBase::SetCursor(const wxCursor& cursor)
 797 {
 798     // setting an invalid cursor is ok, it means that we don't have any special
 799     // cursor
 800     if ( m_cursor == cursor )
 801     {
 802         // no change
 803         return FALSE;
 804     }
 805
 806     m_cursor = cursor;
 807
 808     return TRUE;
 809 }
 810
 811 bool wxWindowBase::SetFont(const wxFont& font)
 812 {
 813     // don't try to set invalid font, always fall back to the default
 814     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 815
 816     if ( fontOk == m_font )
 817     {
 818         // no change
 819         return FALSE;
 820     }
 821
 822     m_font = fontOk;
 823
 824     m_hasFont = TRUE;
 825
 826     return TRUE;
 827 }
 828
 829 #if wxUSE_PALETTE
 830
 831 void wxWindowBase::SetPalette(const wxPalette& pal)
 832 {
 833     m_hasCustomPalette = TRUE;
 834     m_palette = pal;
 835
 836     // VZ: can anyone explain me what do we do here?
 837     wxWindowDC d((wxWindow *) this);
 838     d.SetPalette(pal);
 839 }
 840
 841 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
 842 {
 843     wxWindow *win = (wxWindow *)this;
 844     while ( win && !win->HasCustomPalette() )
 845     {
 846         win = win->GetParent();
 847     }
 848
 849     return win;
 850 }
 851
 852 #endif // wxUSE_PALETTE
 853
 854 #if wxUSE_CARET
 855 void wxWindowBase::SetCaret(wxCaret *caret)
 856 {
 857     if ( m_caret )
 858     {
 859         delete m_caret;
 860     }
 861
 862     m_caret = caret;
 863
 864     if ( m_caret )
 865     {
 866         wxASSERT_MSG( m_caret->GetWindow() == this,
 867                       wxT("caret should be created associated to this window") );
 868     }
 869 }
 870 #endif // wxUSE_CARET
 871
 872 #if wxUSE_VALIDATORS
 873 // ----------------------------------------------------------------------------
 874 // validators
 875 // ----------------------------------------------------------------------------
 876
 877 void wxWindowBase::SetValidator(const wxValidator& validator)
 878 {
 879     if ( m_windowValidator )
 880         delete m_windowValidator;
 881
 882     m_windowValidator = (wxValidator *)validator.Clone();
 883
 884     if ( m_windowValidator )
 885         m_windowValidator->SetWindow(this) ;
 886 }
 887 #endif // wxUSE_VALIDATORS
 888
 889 // ----------------------------------------------------------------------------
 890 // update region stuff
 891 // ----------------------------------------------------------------------------
 892
 893 wxRect wxWindowBase::GetUpdateClientRect() const
 894 {
 895     wxRegion rgnUpdate = GetUpdateRegion();
 896     rgnUpdate.Intersect(GetClientRect());
 897     wxRect rectUpdate = rgnUpdate.GetBox();
 898     wxPoint ptOrigin = GetClientAreaOrigin();
 899     rectUpdate.x -= ptOrigin.x;
 900     rectUpdate.y -= ptOrigin.y;
 901
 902     return rectUpdate;
 903 }
 904
 905 bool wxWindowBase::IsExposed(int x, int y) const
 906 {
 907     return m_updateRegion.Contains(x, y) != wxOutRegion;
 908 }
 909
 910 bool wxWindowBase::IsExposed(int x, int y, int w, int h) const
 911 {
 912     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
 913 }
 914
 915 // ----------------------------------------------------------------------------
 916 // find child window by id or name
 917 // ----------------------------------------------------------------------------
 918
 919 wxWindow *wxWindowBase::FindWindow( long id )
 920 {
 921     if ( id == m_windowId )
 922         return (wxWindow *)this;
 923
 924     wxWindowBase *res = (wxWindow *)NULL;
 925     wxWindowList::Node *node;
 926     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 927     {
 928         wxWindowBase *child = node->GetData();
 929         res = child->FindWindow( id );
 930     }
 931
 932     return (wxWindow *)res;
 933 }
 934
 935 wxWindow *wxWindowBase::FindWindow( const wxString& name )
 936 {
 937     if ( name == m_windowName )
 938         return (wxWindow *)this;
 939
 940     wxWindowBase *res = (wxWindow *)NULL;
 941     wxWindowList::Node *node;
 942     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 943     {
 944         wxWindow *child = node->GetData();
 945         res = child->FindWindow(name);
 946     }
 947
 948     return (wxWindow *)res;
 949 }
 950
 951
 952 // find any window by id or name or label: If parent is non-NULL, look through
 953 // children for a label or title matching the specified string. If NULL, look
 954 // through all top-level windows.
 955 //
 956 // to avoid duplicating code we reuse the same helper function but with
 957 // different comparators
 958
 959 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
 960                                 const wxString& label, long id);
 961
 962 static
 963 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
 964                            long WXUNUSED(id))
 965 {
 966     return win->GetLabel() == label;
 967 }
 968
 969 static
 970 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
 971                           long WXUNUSED(id))
 972 {
 973     return win->GetName() == label;
 974 }
 975
 976 static
 977 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
 978                         long id)
 979 {
 980     return win->GetId() == id;
 981 }
 982
 983 // recursive helper for the FindWindowByXXX() functions
 984 static
 985 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
 986                                   const wxString& label,
 987                                   long id,
 988                                   wxFindWindowCmp cmp)
 989 {
 990     if ( parent )
 991     {
 992         // see if this is the one we're looking for
 993         if ( (*cmp)(parent, label, id) )
 994             return (wxWindow *)parent;
 995
 996         // It wasn't, so check all its children
 997         for ( wxWindowList::Node * node = parent->GetChildren().GetFirst();
 998               node;
 999               node = node->GetNext() )
1000         {
1001             // recursively check each child
1002             wxWindow *win = (wxWindow *)node->GetData();
1003             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1004             if (retwin)
1005                 return retwin;
1006         }
1007     }
1008
1009     // Not found
1010     return NULL;
1011 }
1012
1013 // helper for FindWindowByXXX()
1014 static
1015 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1016                              const wxString& label,
1017                              long id,
1018                              wxFindWindowCmp cmp)
1019 {
1020     if ( parent )
1021     {
1022         // just check parent and all its children
1023         return wxFindWindowRecursively(parent, label, id, cmp);
1024     }
1025
1026     // start at very top of wx's windows
1027     for ( wxWindowList::Node * node = wxTopLevelWindows.GetFirst();
1028           node;
1029           node = node->GetNext() )
1030     {
1031         // recursively check each window & its children
1032         wxWindow *win = node->GetData();
1033         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1034         if (retwin)
1035             return retwin;
1036     }
1037
1038     return NULL;
1039 }
1040
1041 /* static */
1042 wxWindow *
1043 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1044 {
1045     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1046 }
1047
1048 /* static */
1049 wxWindow *
1050 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1051 {
1052     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1053
1054     if ( !win )
1055     {
1056         // fall back to the label
1057         win = FindWindowByLabel(title, parent);
1058     }
1059
1060     return win;
1061 }
1062
1063 /* static */
1064 wxWindow *
1065 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1066 {
1067     return wxFindWindowHelper(parent, _T(""), id, wxFindWindowCmpIds);
1068 }
1069
1070 // ----------------------------------------------------------------------------
1071 // dialog oriented functions
1072 // ----------------------------------------------------------------------------
1073
1074 void wxWindowBase::MakeModal(bool modal)
1075 {
1076     // Disable all other windows
1077     if ( IsTopLevel() )
1078     {
1079         wxWindowList::Node *node = wxTopLevelWindows.GetFirst();
1080         while (node)
1081         {
1082             wxWindow *win = node->GetData();
1083             if (win != this)
1084                 win->Enable(!modal);
1085
1086             node = node->GetNext();
1087         }
1088     }
1089 }
1090
1091 bool wxWindowBase::Validate()
1092 {
1093 #if wxUSE_VALIDATORS
1094     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1095
1096     wxWindowList::Node *node;
1097     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1098     {
1099         wxWindowBase *child = node->GetData();
1100         wxValidator *validator = child->GetValidator();
1101         if ( validator && !validator->Validate((wxWindow *)this) )
1102         {
1103             return FALSE;
1104         }
1105
1106         if ( recurse && !child->Validate() )
1107         {
1108             return FALSE;
1109         }
1110     }
1111 #endif // wxUSE_VALIDATORS
1112
1113     return TRUE;
1114 }
1115
1116 bool wxWindowBase::TransferDataToWindow()
1117 {
1118 #if wxUSE_VALIDATORS
1119     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1120
1121     wxWindowList::Node *node;
1122     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1123     {
1124         wxWindowBase *child = node->GetData();
1125         wxValidator *validator = child->GetValidator();
1126         if ( validator && !validator->TransferToWindow() )
1127         {
1128             wxLogWarning(_("Could not transfer data to window"));
1129             wxLog::FlushActive();
1130
1131             return FALSE;
1132         }
1133
1134         if ( recurse )
1135         {
1136             if ( !child->TransferDataToWindow() )
1137             {
1138                 // warning already given
1139                 return FALSE;
1140             }
1141         }
1142     }
1143 #endif // wxUSE_VALIDATORS
1144
1145     return TRUE;
1146 }
1147
1148 bool wxWindowBase::TransferDataFromWindow()
1149 {
1150 #if wxUSE_VALIDATORS
1151     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1152
1153     wxWindowList::Node *node;
1154     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1155     {
1156         wxWindow *child = node->GetData();
1157         wxValidator *validator = child->GetValidator();
1158         if ( validator && !validator->TransferFromWindow() )
1159         {
1160             // nop warning here because the application is supposed to give
1161             // one itself - we don't know here what might have gone wrongly
1162
1163             return FALSE;
1164         }
1165
1166         if ( recurse )
1167         {
1168             if ( !child->TransferDataFromWindow() )
1169             {
1170                 // warning already given
1171                 return FALSE;
1172             }
1173         }
1174     }
1175 #endif // wxUSE_VALIDATORS
1176
1177     return TRUE;
1178 }
1179
1180 void wxWindowBase::InitDialog()
1181 {
1182     wxInitDialogEvent event(GetId());
1183     event.SetEventObject( this );
1184     GetEventHandler()->ProcessEvent(event);
1185 }
1186
1187 // ----------------------------------------------------------------------------
1188 // context-sensitive help support
1189 // ----------------------------------------------------------------------------
1190
1191 #if wxUSE_HELP
1192
1193 // associate this help text with this window
1194 void wxWindowBase::SetHelpText(const wxString& text)
1195 {
1196     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1197     if ( helpProvider )
1198     {
1199         helpProvider->AddHelp(this, text);
1200     }
1201 }
1202
1203 // associate this help text with all windows with the same id as this
1204 // one
1205 void wxWindowBase::SetHelpTextForId(const wxString& text)
1206 {
1207     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1208     if ( helpProvider )
1209     {
1210         helpProvider->AddHelp(GetId(), text);
1211     }
1212 }
1213
1214 // get the help string associated with this window (may be empty)
1215 wxString wxWindowBase::GetHelpText() const
1216 {
1217     wxString text;
1218     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1219     if ( helpProvider )
1220     {
1221         text = helpProvider->GetHelp(this);
1222     }
1223
1224     return text;
1225 }
1226
1227 // show help for this window
1228 void wxWindowBase::OnHelp(wxHelpEvent& event)
1229 {
1230     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1231     if ( helpProvider )
1232     {
1233         if ( helpProvider->ShowHelp(this) )
1234         {
1235             // skip the event.Skip() below
1236             return;
1237         }
1238     }
1239
1240     event.Skip();
1241 }
1242
1243 #endif // wxUSE_HELP
1244
1245 // ----------------------------------------------------------------------------
1246 // tooltipsroot.Replace("\\", "/");
1247 // ----------------------------------------------------------------------------
1248
1249 #if wxUSE_TOOLTIPS
1250
1251 void wxWindowBase::SetToolTip( const wxString &tip )
1252 {
1253     // don't create the new tooltip if we already have one
1254     if ( m_tooltip )
1255     {
1256         m_tooltip->SetTip( tip );
1257     }
1258     else
1259     {
1260         SetToolTip( new wxToolTip( tip ) );
1261     }
1262
1263     // setting empty tooltip text does not remove the tooltip any more - use
1264     // SetToolTip((wxToolTip *)NULL) for this
1265 }
1266
1267 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
1268 {
1269     if ( m_tooltip )
1270         delete m_tooltip;
1271
1272     m_tooltip = tooltip;
1273 }
1274
1275 #endif // wxUSE_TOOLTIPS
1276
1277 // ----------------------------------------------------------------------------
1278 // constraints and sizers
1279 // ----------------------------------------------------------------------------
1280
1281 #if wxUSE_CONSTRAINTS
1282
1283 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
1284 {
1285     if ( m_constraints )
1286     {
1287         UnsetConstraints(m_constraints);
1288         delete m_constraints;
1289     }
1290     m_constraints = constraints;
1291     if ( m_constraints )
1292     {
1293         // Make sure other windows know they're part of a 'meaningful relationship'
1294         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
1295             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
1296         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
1297             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
1298         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
1299             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
1300         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
1301             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
1302         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
1303             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
1304         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
1305             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
1306         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
1307             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
1308         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
1309             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
1310     }
1311 }
1312
1313 // This removes any dangling pointers to this window in other windows'
1314 // constraintsInvolvedIn lists.
1315 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
1316 {
1317     if ( c )
1318     {
1319         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1320             c->left.GetOtherWindow()->RemoveConstraintReference(this);
1321         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1322             c->top.GetOtherWindow()->RemoveConstraintReference(this);
1323         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
1324             c->right.GetOtherWindow()->RemoveConstraintReference(this);
1325         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
1326             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
1327         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
1328             c->width.GetOtherWindow()->RemoveConstraintReference(this);
1329         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
1330             c->height.GetOtherWindow()->RemoveConstraintReference(this);
1331         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
1332             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
1333         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
1334             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
1335     }
1336 }
1337
1338 // Back-pointer to other windows we're involved with, so if we delete this
1339 // window, we must delete any constraints we're involved with.
1340 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
1341 {
1342     if ( !m_constraintsInvolvedIn )
1343         m_constraintsInvolvedIn = new wxWindowList;
1344     if ( !m_constraintsInvolvedIn->Find(otherWin) )
1345         m_constraintsInvolvedIn->Append(otherWin);
1346 }
1347
1348 // REMOVE back-pointer to other windows we're involved with.
1349 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
1350 {
1351     if ( m_constraintsInvolvedIn )
1352         m_constraintsInvolvedIn->DeleteObject(otherWin);
1353 }
1354
1355 // Reset any constraints that mention this window
1356 void wxWindowBase::DeleteRelatedConstraints()
1357 {
1358     if ( m_constraintsInvolvedIn )
1359     {
1360         wxWindowList::Node *node = m_constraintsInvolvedIn->GetFirst();
1361         while (node)
1362         {
1363             wxWindow *win = node->GetData();
1364             wxLayoutConstraints *constr = win->GetConstraints();
1365
1366             // Reset any constraints involving this window
1367             if ( constr )
1368             {
1369                 constr->left.ResetIfWin(this);
1370                 constr->top.ResetIfWin(this);
1371                 constr->right.ResetIfWin(this);
1372                 constr->bottom.ResetIfWin(this);
1373                 constr->width.ResetIfWin(this);
1374                 constr->height.ResetIfWin(this);
1375                 constr->centreX.ResetIfWin(this);
1376                 constr->centreY.ResetIfWin(this);
1377             }
1378
1379             wxWindowList::Node *next = node->GetNext();
1380             delete node;
1381             node = next;
1382         }
1383
1384         delete m_constraintsInvolvedIn;
1385         m_constraintsInvolvedIn = (wxWindowList *) NULL;
1386     }
1387 }
1388
1389 #endif // wxUSE_CONSTRAINTS
1390
1391 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
1392 {
1393     if ( deleteOld )
1394         delete m_windowSizer;
1395
1396     m_windowSizer = sizer;
1397
1398     SetAutoLayout( sizer != NULL );
1399 }
1400
1401 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
1402 {
1403     SetSizer( sizer, deleteOld );
1404     sizer->SetSizeHints( (wxWindow*) this );
1405 }
1406
1407 #if wxUSE_CONSTRAINTS
1408
1409 void wxWindowBase::SatisfyConstraints()
1410 {
1411     wxLayoutConstraints *constr = GetConstraints();
1412     bool wasOk = constr && constr->AreSatisfied();
1413
1414     ResetConstraints();   // Mark all constraints as unevaluated
1415
1416     int noChanges = 1;
1417
1418     // if we're a top level panel (i.e. our parent is frame/dialog), our
1419     // own constraints will never be satisfied any more unless we do it
1420     // here
1421     if ( wasOk )
1422     {
1423         while ( noChanges > 0 )
1424         {
1425             LayoutPhase1(&noChanges);
1426         }
1427     }
1428
1429     LayoutPhase2(&noChanges);
1430 }
1431
1432 #endif // wxUSE_CONSTRAINTS
1433
1434 bool wxWindowBase::Layout()
1435 {
1436     // If there is a sizer, use it instead of the constraints
1437     if ( GetSizer() )
1438     {
1439         int w, h;
1440         GetVirtualSize(&w, &h);
1441         GetSizer()->SetDimension( 0, 0, w, h );
1442     }
1443 #if wxUSE_CONSTRAINTS
1444     else
1445     {
1446         SatisfyConstraints(); // Find the right constraints values
1447         SetConstraintSizes(); // Recursively set the real window sizes
1448     }
1449 #endif
1450
1451     return TRUE;
1452 }
1453
1454 #if wxUSE_CONSTRAINTS
1455
1456 // first phase of the constraints evaluation: set our own constraints
1457 bool wxWindowBase::LayoutPhase1(int *noChanges)
1458 {
1459     wxLayoutConstraints *constr = GetConstraints();
1460
1461     return !constr || constr->SatisfyConstraints(this, noChanges);
1462 }
1463
1464 // second phase: set the constraints for our children
1465 bool wxWindowBase::LayoutPhase2(int *noChanges)
1466 {
1467     *noChanges = 0;
1468
1469     // Layout children
1470     DoPhase(1);
1471
1472     // Layout grand children
1473     DoPhase(2);
1474
1475     return TRUE;
1476 }
1477
1478 // Do a phase of evaluating child constraints
1479 bool wxWindowBase::DoPhase(int phase)
1480 {
1481     // the list containing the children for which the constraints are already
1482     // set correctly
1483     wxWindowList succeeded;
1484
1485     // the max number of iterations we loop before concluding that we can't set
1486     // the constraints
1487     static const int maxIterations = 500;
1488
1489     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
1490     {
1491         int noChanges = 0;
1492
1493         // loop over all children setting their constraints
1494         for ( wxWindowList::Node *node = GetChildren().GetFirst();
1495               node;
1496               node = node->GetNext() )
1497         {
1498             wxWindow *child = node->GetData();
1499             if ( child->IsTopLevel() )
1500             {
1501                 // top level children are not inside our client area
1502                 continue;
1503             }
1504
1505             if ( !child->GetConstraints() || succeeded.Find(child) )
1506             {
1507                 // this one is either already ok or nothing we can do about it
1508                 continue;
1509             }
1510
1511             int tempNoChanges = 0;
1512             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
1513                                       : child->LayoutPhase2(&tempNoChanges);
1514             noChanges += tempNoChanges;
1515
1516             if ( success )
1517             {
1518                 succeeded.Append(child);
1519             }
1520         }
1521
1522         if ( !noChanges )
1523         {
1524             // constraints are set
1525             break;
1526         }
1527     }
1528
1529     return TRUE;
1530 }
1531
1532 void wxWindowBase::ResetConstraints()
1533 {
1534     wxLayoutConstraints *constr = GetConstraints();
1535     if ( constr )
1536     {
1537         constr->left.SetDone(FALSE);
1538         constr->top.SetDone(FALSE);
1539         constr->right.SetDone(FALSE);
1540         constr->bottom.SetDone(FALSE);
1541         constr->width.SetDone(FALSE);
1542         constr->height.SetDone(FALSE);
1543         constr->centreX.SetDone(FALSE);
1544         constr->centreY.SetDone(FALSE);
1545     }
1546
1547     wxWindowList::Node *node = GetChildren().GetFirst();
1548     while (node)
1549     {
1550         wxWindow *win = node->GetData();
1551         if ( !win->IsTopLevel() )
1552             win->ResetConstraints();
1553         node = node->GetNext();
1554     }
1555 }
1556
1557 // Need to distinguish between setting the 'fake' size for windows and sizers,
1558 // and setting the real values.
1559 void wxWindowBase::SetConstraintSizes(bool recurse)
1560 {
1561     wxLayoutConstraints *constr = GetConstraints();
1562     if ( constr && constr->AreSatisfied() )
1563     {
1564         int x = constr->left.GetValue();
1565         int y = constr->top.GetValue();
1566         int w = constr->width.GetValue();
1567         int h = constr->height.GetValue();
1568
1569         if ( (constr->width.GetRelationship() != wxAsIs ) ||
1570              (constr->height.GetRelationship() != wxAsIs) )
1571         {
1572             SetSize(x, y, w, h);
1573         }
1574         else
1575         {
1576             // If we don't want to resize this window, just move it...
1577             Move(x, y);
1578         }
1579     }
1580     else if ( constr )
1581     {
1582         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
1583                    GetClassInfo()->GetClassName(),
1584                    GetName().c_str());
1585     }
1586
1587     if ( recurse )
1588     {
1589         wxWindowList::Node *node = GetChildren().GetFirst();
1590         while (node)
1591         {
1592             wxWindow *win = node->GetData();
1593             if ( !win->IsTopLevel() && win->GetConstraints() )
1594                 win->SetConstraintSizes();
1595             node = node->GetNext();
1596         }
1597     }
1598 }
1599
1600 // Only set the size/position of the constraint (if any)
1601 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
1602 {
1603     wxLayoutConstraints *constr = GetConstraints();
1604     if ( constr )
1605     {
1606         if ( x != -1 )
1607         {
1608             constr->left.SetValue(x);
1609             constr->left.SetDone(TRUE);
1610         }
1611         if ( y != -1 )
1612         {
1613             constr->top.SetValue(y);
1614             constr->top.SetDone(TRUE);
1615         }
1616         if ( w != -1 )
1617         {
1618             constr->width.SetValue(w);
1619             constr->width.SetDone(TRUE);
1620         }
1621         if ( h != -1 )
1622         {
1623             constr->height.SetValue(h);
1624             constr->height.SetDone(TRUE);
1625         }
1626     }
1627 }
1628
1629 void wxWindowBase::MoveConstraint(int x, int y)
1630 {
1631     wxLayoutConstraints *constr = GetConstraints();
1632     if ( constr )
1633     {
1634         if ( x != -1 )
1635         {
1636             constr->left.SetValue(x);
1637             constr->left.SetDone(TRUE);
1638         }
1639         if ( y != -1 )
1640         {
1641             constr->top.SetValue(y);
1642             constr->top.SetDone(TRUE);
1643         }
1644     }
1645 }
1646
1647 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
1648 {
1649     wxLayoutConstraints *constr = GetConstraints();
1650     if ( constr )
1651     {
1652         *w = constr->width.GetValue();
1653         *h = constr->height.GetValue();
1654     }
1655     else
1656         GetSize(w, h);
1657 }
1658
1659 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
1660 {
1661     wxLayoutConstraints *constr = GetConstraints();
1662     if ( constr )
1663     {
1664         *w = constr->width.GetValue();
1665         *h = constr->height.GetValue();
1666     }
1667     else
1668         GetClientSize(w, h);
1669 }
1670
1671 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
1672 {
1673     wxLayoutConstraints *constr = GetConstraints();
1674     if ( constr )
1675     {
1676         *x = constr->left.GetValue();
1677         *y = constr->top.GetValue();
1678     }
1679     else
1680         GetPosition(x, y);
1681 }
1682
1683 #endif // wxUSE_CONSTRAINTS
1684
1685 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
1686 {
1687     // don't do it for the dialogs/frames - they float independently of their
1688     // parent
1689     if ( !IsTopLevel() )
1690     {
1691         wxWindow *parent = GetParent();
1692         if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
1693         {
1694             wxPoint pt(parent->GetClientAreaOrigin());
1695             x += pt.x;
1696             y += pt.y;
1697         }
1698     }
1699 }
1700
1701 // ----------------------------------------------------------------------------
1702 // do Update UI processing for child controls
1703 // ----------------------------------------------------------------------------
1704
1705 // TODO: should this be implemented for the child window rather
1706 // than the parent? Then you can override it e.g. for wxCheckBox
1707 // to do the Right Thing rather than having to assume a fixed number
1708 // of control classes.
1709 void wxWindowBase::UpdateWindowUI()
1710 {
1711 #if wxUSE_CONTROLS
1712     wxUpdateUIEvent event(GetId());
1713     event.m_eventObject = this;
1714
1715     if ( GetEventHandler()->ProcessEvent(event) )
1716     {
1717         if ( event.GetSetEnabled() )
1718             Enable(event.GetEnabled());
1719
1720         if ( event.GetSetText() )
1721         {
1722             wxControl *control = wxDynamicCastThis(wxControl);
1723             if ( control )
1724             {
1725 #if wxUSE_TEXTCTRL
1726                 wxTextCtrl *text = wxDynamicCast(control, wxTextCtrl);
1727                 if ( text )
1728                     text->SetValue(event.GetText());
1729                 else
1730 #endif // wxUSE_TEXTCTRL
1731                     control->SetLabel(event.GetText());
1732             }
1733         }
1734
1735 #if wxUSE_CHECKBOX
1736         wxCheckBox *checkbox = wxDynamicCastThis(wxCheckBox);
1737         if ( checkbox )
1738         {
1739             if ( event.GetSetChecked() )
1740                 checkbox->SetValue(event.GetChecked());
1741         }
1742 #endif // wxUSE_CHECKBOX
1743
1744 #if wxUSE_RADIOBTN
1745         wxRadioButton *radiobtn = wxDynamicCastThis(wxRadioButton);
1746         if ( radiobtn )
1747         {
1748             if ( event.GetSetChecked() )
1749                 radiobtn->SetValue(event.GetChecked());
1750         }
1751 #endif // wxUSE_RADIOBTN
1752     }
1753 #endif // wxUSE_CONTROLS
1754 }
1755
1756 // ----------------------------------------------------------------------------
1757 // dialog units translations
1758 // ----------------------------------------------------------------------------
1759
1760 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
1761 {
1762     int charWidth = GetCharWidth();
1763     int charHeight = GetCharHeight();
1764     wxPoint pt2(-1, -1);
1765     if (pt.x != -1)
1766         pt2.x = (int) ((pt.x * 4) / charWidth) ;
1767     if (pt.y != -1)
1768         pt2.y = (int) ((pt.y * 8) / charHeight) ;
1769
1770     return pt2;
1771 }
1772
1773 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
1774 {
1775     int charWidth = GetCharWidth();
1776     int charHeight = GetCharHeight();
1777     wxPoint pt2(-1, -1);
1778     if (pt.x != -1)
1779         pt2.x = (int) ((pt.x * charWidth) / 4) ;
1780     if (pt.y != -1)
1781         pt2.y = (int) ((pt.y * charHeight) / 8) ;
1782
1783     return pt2;
1784 }
1785
1786 // ----------------------------------------------------------------------------
1787 // event handlers
1788 // ----------------------------------------------------------------------------
1789
1790 // propagate the colour change event to the subwindows
1791 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
1792 {
1793     wxWindowList::Node *node = GetChildren().GetFirst();
1794     while ( node )
1795     {
1796         // Only propagate to non-top-level windows
1797         wxWindow *win = node->GetData();
1798         if ( !win->IsTopLevel() )
1799         {
1800             wxSysColourChangedEvent event2;
1801             event.m_eventObject = win;
1802             win->GetEventHandler()->ProcessEvent(event2);
1803         }
1804
1805         node = node->GetNext();
1806     }
1807 }
1808
1809 // the default action is to populate dialog with data when it's created
1810 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
1811 {
1812     TransferDataToWindow();
1813 }
1814
1815 // process Ctrl-Alt-mclick
1816 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
1817 {
1818 #if wxUSE_MSGDLG
1819     if ( event.ControlDown() && event.AltDown() )
1820     {
1821         // don't translate these strings
1822         wxString port;
1823
1824 #ifdef __WXUNIVERSAL__
1825         port = _T("Univ/");
1826 #endif // __WXUNIVERSAL__
1827
1828         switch ( wxGetOsVersion() )
1829         {
1830             case wxMOTIF_X:     port = _T("Motif"); break;
1831             case wxMAC:
1832             case wxMAC_DARWIN:  port = _T("Mac"); break;
1833             case wxBEOS:        port = _T("BeOS"); break;
1834             case wxGTK:
1835             case wxGTK_WIN32:
1836             case wxGTK_OS2:
1837             case wxGTK_BEOS:    port = _T("GTK"); break;
1838             case wxWINDOWS:
1839             case wxPENWINDOWS:
1840             case wxWINDOWS_NT:
1841             case wxWIN32S:
1842             case wxWIN95:
1843             case wxWIN386:      port = _T("MS Windows"); break;
1844             case wxMGL_UNIX:
1845             case wxMGL_X:
1846             case wxMGL_WIN32:
1847             case wxMGL_OS2:     port = _T("MGL"); break;
1848             case wxWINDOWS_OS2:
1849             case wxOS2_PM:      port = _T("OS/2"); break;
1850             default:            port = _T("unknown"); break;
1851         }
1852
1853         wxMessageBox(wxString::Format(
1854                                       _T(
1855                                         "       wxWindows Library (%s port)\nVersion %u.%u.%u%s, compiled at %s %s\n   Copyright (c) 1995-2002 wxWindows team"
1856                                         ),
1857                                       port.c_str(),
1858                                       wxMAJOR_VERSION,
1859                                       wxMINOR_VERSION,
1860                                       wxRELEASE_NUMBER,
1861 #if wxUSE_UNICODE
1862                                       L" (Unicode)",
1863 #else
1864                                       "",
1865 #endif
1866                                       __TDATE__,
1867                                       __TTIME__
1868                                      ),
1869                      _T("wxWindows information"),
1870                      wxICON_INFORMATION | wxOK,
1871                      (wxWindow *)this);
1872     }
1873     else
1874 #endif // wxUSE_MSGDLG
1875     {
1876         event.Skip();
1877     }
1878 }
1879
1880 // ----------------------------------------------------------------------------
1881 // list classes implementation
1882 // ----------------------------------------------------------------------------
1883
1884 void wxWindowListNode::DeleteData()
1885 {
1886     delete (wxWindow *)GetData();
1887 }
1888
1889 // ----------------------------------------------------------------------------
1890 // borders
1891 // ----------------------------------------------------------------------------
1892
1893 wxBorder wxWindowBase::GetBorder() const
1894 {
1895     wxBorder border = (wxBorder)(m_windowStyle & wxBORDER_MASK);
1896     if ( border == wxBORDER_DEFAULT )
1897     {
1898         border = GetDefaultBorder();
1899     }
1900
1901     return border;
1902 }
1903
1904 wxBorder wxWindowBase::GetDefaultBorder() const
1905 {
1906     return wxBORDER_NONE;
1907 }
1908
1909 // ----------------------------------------------------------------------------
1910 // hit testing
1911 // ----------------------------------------------------------------------------
1912
1913 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
1914 {
1915     // here we just check if the point is inside the window or not
1916
1917     // check the top and left border first
1918     bool outside = x < 0 || y < 0;
1919     if ( !outside )
1920     {
1921         // check the right and bottom borders too
1922         wxSize size = GetSize();
1923         outside = x >= size.x || y >= size.y;
1924     }
1925
1926     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
1927 }
1928
1929 // ----------------------------------------------------------------------------
1930 // mouse capture
1931 // ----------------------------------------------------------------------------
1932
1933 struct WXDLLEXPORT wxWindowNext
1934 {
1935     wxWindow *win;
1936     wxWindowNext *next;
1937 } *wxWindowBase::ms_winCaptureNext = NULL;
1938
1939 void wxWindowBase::CaptureMouse()
1940 {
1941     wxLogTrace(_T("mousecapture"), _T("CaptureMouse(0x%08x)"), this);
1942
1943     wxWindow *winOld = GetCapture();
1944     if ( winOld )
1945     {
1946         ((wxWindowBase*) winOld)->DoReleaseMouse();
1947
1948         // save it on stack
1949         wxWindowNext *item = new wxWindowNext;
1950         item->win = winOld;
1951         item->next = ms_winCaptureNext;
1952         ms_winCaptureNext = item;
1953     }
1954     //else: no mouse capture to save
1955
1956     DoCaptureMouse();
1957 }
1958
1959 void wxWindowBase::ReleaseMouse()
1960 {
1961     wxLogTrace(_T("mousecapture"), _T("ReleaseMouse(0x%08x)"), this);
1962
1963     wxASSERT_MSG( GetCapture() == this, wxT("attempt to release mouse, but this window hasn't captured it") )
1964
1965     DoReleaseMouse();
1966
1967     if ( ms_winCaptureNext )
1968     {
1969         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
1970
1971         wxWindowNext *item = ms_winCaptureNext;
1972         ms_winCaptureNext = item->next;
1973         delete item;
1974     }
1975     //else: stack is empty, no previous capture
1976
1977     wxLogTrace(_T("mousecapture"),
1978                _T("After ReleaseMouse() mouse is captured by 0x%08x"),
1979                GetCapture());
1980 }
1981
1982 // ----------------------------------------------------------------------------
1983 // global functions
1984 // ----------------------------------------------------------------------------
1985
1986 wxWindow* wxGetTopLevelParent(wxWindow *win)
1987 {
1988     while ( win && !win->IsTopLevel() )
1989          win = win->GetParent();
1990
1991     return win;
1992 }
1993