src/common/wincmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/wincmn.cpp
   3 // Purpose:     common (to all ports) wxWindow functions
   4 // Author:      Julian Smart, Vadim Zeitlin
   5 // Modified by:
   6 // Created:     13/07/98
   7 // Copyright:   (c) wxWidgets team
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11 // ============================================================================
  12 // declarations
  13 // ============================================================================
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18
  19 // For compilers that support precompilation, includes "wx.h".
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/string.h"
  28     #include "wx/log.h"
  29     #include "wx/intl.h"
  30     #include "wx/frame.h"
  31     #include "wx/window.h"
  32     #include "wx/control.h"
  33     #include "wx/checkbox.h"
  34     #include "wx/radiobut.h"
  35     #include "wx/statbox.h"
  36     #include "wx/textctrl.h"
  37     #include "wx/settings.h"
  38     #include "wx/dialog.h"
  39     #include "wx/msgdlg.h"
  40     #include "wx/msgout.h"
  41     #include "wx/statusbr.h"
  42     #include "wx/toolbar.h"
  43     #include "wx/dcclient.h"
  44     #include "wx/scrolbar.h"
  45     #include "wx/layout.h"
  46     #include "wx/sizer.h"
  47     #include "wx/menu.h"
  48 #endif //WX_PRECOMP
  49
  50 #if wxUSE_DRAG_AND_DROP
  51     #include "wx/dnd.h"
  52 #endif // wxUSE_DRAG_AND_DROP
  53
  54 #if wxUSE_ACCESSIBILITY
  55     #include "wx/access.h"
  56 #endif
  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 #if wxUSE_SYSTEM_OPTIONS
  71     #include "wx/sysopt.h"
  72 #endif
  73
  74 #include "wx/platinfo.h"
  75 #include "wx/private/window.h"
  76
  77 #ifdef __WINDOWS__
  78     #include "wx/msw/wrapwin.h"
  79 #endif
  80
  81 // Windows List
  82 WXDLLIMPEXP_DATA_CORE(wxWindowList) wxTopLevelWindows;
  83
  84 // globals
  85 #if wxUSE_MENUS
  86 wxMenu *wxCurrentPopupMenu = NULL;
  87 #endif // wxUSE_MENUS
  88
  89 extern WXDLLEXPORT_DATA(const char) wxPanelNameStr[] = "panel";
  90
  91 // ----------------------------------------------------------------------------
  92 // static data
  93 // ----------------------------------------------------------------------------
  94
  95
  96 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  97
  98 // ----------------------------------------------------------------------------
  99 // event table
 100 // ----------------------------------------------------------------------------
 101
 102 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
 103     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
 104     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
 105     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
 106
 107 #if wxUSE_HELP
 108     EVT_HELP(wxID_ANY, wxWindowBase::OnHelp)
 109 #endif // wxUSE_HELP
 110
 111     EVT_SIZE(wxWindowBase::InternalOnSize)
 112 END_EVENT_TABLE()
 113
 114 // ============================================================================
 115 // implementation of the common functionality of the wxWindow class
 116 // ============================================================================
 117
 118 // ----------------------------------------------------------------------------
 119 // XTI
 120 // ----------------------------------------------------------------------------
 121
 122 #if wxUSE_EXTENDED_RTTI
 123
 124 // windows that are created from a parent window during its Create method,
 125 // eg. spin controls in a calendar controls must never been streamed out
 126 // separately otherwise chaos occurs. Right now easiest is to test for negative ids,
 127 // as windows with negative ids never can be recreated anyway
 128
 129
 130 bool wxWindowStreamingCallback( const wxObject *object, wxObjectWriter *,
 131                                wxObjectWriterCallback *, const wxStringToAnyHashMap & )
 132 {
 133     const wxWindow * win = wx_dynamic_cast(const wxWindow*, object);
 134     if ( win && win->GetId() < 0 )
 135         return false;
 136     return true;
 137 }
 138
 139 wxIMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxWindow, wxWindowBase, "wx/window.h", \
 140                                        wxWindowStreamingCallback)
 141
 142 // make wxWindowList known before the property is used
 143
 144 wxCOLLECTION_TYPE_INFO( wxWindow*, wxWindowList );
 145
 146 template<> void wxCollectionToVariantArray( wxWindowList const &theList,
 147                                            wxAnyList &value)
 148 {
 149     wxListCollectionToAnyList<wxWindowList::compatibility_iterator>( theList, value );
 150 }
 151
 152 wxDEFINE_FLAGS( wxWindowStyle )
 153
 154 wxBEGIN_FLAGS( wxWindowStyle )
 155 // new style border flags, we put them first to
 156 // use them for streaming out
 157
 158 wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 159 wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 160 wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 161 wxFLAGS_MEMBER(wxBORDER_RAISED)
 162 wxFLAGS_MEMBER(wxBORDER_STATIC)
 163 wxFLAGS_MEMBER(wxBORDER_NONE)
 164
 165 // old style border flags
 166 wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 167 wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 168 wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 169 wxFLAGS_MEMBER(wxRAISED_BORDER)
 170 wxFLAGS_MEMBER(wxSTATIC_BORDER)
 171 wxFLAGS_MEMBER(wxBORDER)
 172
 173 // standard window styles
 174 wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 175 wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 176 wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 177 wxFLAGS_MEMBER(wxWANTS_CHARS)
 178 wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 179 wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 180 wxFLAGS_MEMBER(wxVSCROLL)
 181 wxFLAGS_MEMBER(wxHSCROLL)
 182
 183 wxEND_FLAGS( wxWindowStyle )
 184
 185 wxBEGIN_PROPERTIES_TABLE(wxWindow)
 186 wxEVENT_PROPERTY( Close, wxEVT_CLOSE_WINDOW, wxCloseEvent)
 187 wxEVENT_PROPERTY( Create, wxEVT_CREATE, wxWindowCreateEvent )
 188 wxEVENT_PROPERTY( Destroy, wxEVT_DESTROY, wxWindowDestroyEvent )
 189 // Always constructor Properties first
 190
 191 wxREADONLY_PROPERTY( Parent,wxWindow*, GetParent, wxEMPTY_PARAMETER_VALUE, \
 192                     0 /*flags*/, wxT("Helpstring"), wxT("group"))
 193 wxPROPERTY( Id,wxWindowID, SetId, GetId, -1 /*wxID_ANY*/, 0 /*flags*/, \
 194            wxT("Helpstring"), wxT("group") )
 195 wxPROPERTY( Position,wxPoint, SetPosition, GetPosition, wxDefaultPosition, \
 196            0 /*flags*/, wxT("Helpstring"), wxT("group")) // pos
 197 wxPROPERTY( Size,wxSize, SetSize, GetSize, wxDefaultSize, 0 /*flags*/, \
 198            wxT("Helpstring"), wxT("group")) // size
 199 wxPROPERTY( WindowStyle, long, SetWindowStyleFlag, GetWindowStyleFlag, \
 200            wxEMPTY_PARAMETER_VALUE, 0 /*flags*/, wxT("Helpstring"), wxT("group")) // style
 201 wxPROPERTY( Name,wxString, SetName, GetName, wxEmptyString, 0 /*flags*/, \
 202            wxT("Helpstring"), wxT("group") )
 203
 204 // Then all relations of the object graph
 205
 206 wxREADONLY_PROPERTY_COLLECTION( Children, wxWindowList, wxWindowBase*, \
 207                                GetWindowChildren, wxPROP_OBJECT_GRAPH /*flags*/, \
 208                                wxT("Helpstring"), wxT("group"))
 209
 210 // and finally all other properties
 211
 212 wxPROPERTY( ExtraStyle, long, SetExtraStyle, GetExtraStyle, wxEMPTY_PARAMETER_VALUE, \
 213            0 /*flags*/, wxT("Helpstring"), wxT("group")) // extstyle
 214 wxPROPERTY( BackgroundColour, wxColour, SetBackgroundColour, GetBackgroundColour, \
 215            wxEMPTY_PARAMETER_VALUE, 0 /*flags*/, wxT("Helpstring"), wxT("group")) // bg
 216 wxPROPERTY( ForegroundColour, wxColour, SetForegroundColour, GetForegroundColour, \
 217            wxEMPTY_PARAMETER_VALUE, 0 /*flags*/, wxT("Helpstring"), wxT("group")) // fg
 218 wxPROPERTY( Enabled, bool, Enable, IsEnabled, wxAny((bool)true), 0 /*flags*/, \
 219            wxT("Helpstring"), wxT("group"))
 220 wxPROPERTY( Shown, bool, Show, IsShown, wxAny((bool)true), 0 /*flags*/, \
 221            wxT("Helpstring"), wxT("group"))
 222
 223 #if 0
 224 // possible property candidates (not in xrc) or not valid in all subclasses
 225 wxPROPERTY( Title,wxString, SetTitle, GetTitle, wxEmptyString )
 226 wxPROPERTY( Font, wxFont, SetFont, GetWindowFont , )
 227 wxPROPERTY( Label,wxString, SetLabel, GetLabel, wxEmptyString )
 228 // MaxHeight, Width, MinHeight, Width
 229 // TODO switch label to control and title to toplevels
 230
 231 wxPROPERTY( ThemeEnabled, bool, SetThemeEnabled, GetThemeEnabled, )
 232 //wxPROPERTY( Cursor, wxCursor, SetCursor, GetCursor, )
 233 // wxPROPERTY( ToolTip, wxString, SetToolTip, GetToolTipText, )
 234 wxPROPERTY( AutoLayout, bool, SetAutoLayout, GetAutoLayout, )
 235 #endif
 236 wxEND_PROPERTIES_TABLE()
 237
 238 wxEMPTY_HANDLERS_TABLE(wxWindow)
 239
 240 wxCONSTRUCTOR_DUMMY(wxWindow)
 241
 242 #else
 243
 244 #ifndef __WXUNIVERSAL__
 245 IMPLEMENT_DYNAMIC_CLASS(wxWindow, wxWindowBase)
 246 #endif
 247
 248 #endif
 249
 250 // ----------------------------------------------------------------------------
 251 // initialization
 252 // ----------------------------------------------------------------------------
 253
 254 // the default initialization
 255 wxWindowBase::wxWindowBase()
 256 {
 257     // no window yet, no parent nor children
 258     m_parent = NULL;
 259     m_windowId = wxID_ANY;
 260
 261     // no constraints on the minimal window size
 262     m_minWidth =
 263     m_maxWidth = wxDefaultCoord;
 264     m_minHeight =
 265     m_maxHeight = wxDefaultCoord;
 266
 267     // invalidiated cache value
 268     m_bestSizeCache = wxDefaultSize;
 269
 270     // window are created enabled and visible by default
 271     m_isShown =
 272     m_isEnabled = true;
 273
 274     // the default event handler is just this window
 275     m_eventHandler = this;
 276
 277 #if wxUSE_VALIDATORS
 278     // no validator
 279     m_windowValidator = NULL;
 280 #endif // wxUSE_VALIDATORS
 281
 282     // the colours/fonts are default for now, so leave m_font,
 283     // m_backgroundColour and m_foregroundColour uninitialized and set those
 284     m_hasBgCol =
 285     m_hasFgCol =
 286     m_hasFont = false;
 287     m_inheritBgCol =
 288     m_inheritFgCol =
 289     m_inheritFont = false;
 290
 291     // no style bits
 292     m_exStyle =
 293     m_windowStyle = 0;
 294
 295     m_backgroundStyle = wxBG_STYLE_ERASE;
 296
 297 #if wxUSE_CONSTRAINTS
 298     // no constraints whatsoever
 299     m_constraints = NULL;
 300     m_constraintsInvolvedIn = NULL;
 301 #endif // wxUSE_CONSTRAINTS
 302
 303     m_windowSizer = NULL;
 304     m_containingSizer = NULL;
 305     m_autoLayout = false;
 306
 307 #if wxUSE_DRAG_AND_DROP
 308     m_dropTarget = NULL;
 309 #endif // wxUSE_DRAG_AND_DROP
 310
 311 #if wxUSE_TOOLTIPS
 312     m_tooltip = NULL;
 313 #endif // wxUSE_TOOLTIPS
 314
 315 #if wxUSE_CARET
 316     m_caret = NULL;
 317 #endif // wxUSE_CARET
 318
 319 #if wxUSE_PALETTE
 320     m_hasCustomPalette = false;
 321 #endif // wxUSE_PALETTE
 322
 323 #if wxUSE_ACCESSIBILITY
 324     m_accessible = NULL;
 325 #endif
 326
 327     m_virtualSize = wxDefaultSize;
 328
 329     m_scrollHelper = NULL;
 330
 331     m_windowVariant = wxWINDOW_VARIANT_NORMAL;
 332 #if wxUSE_SYSTEM_OPTIONS
 333     if ( wxSystemOptions::HasOption(wxWINDOW_DEFAULT_VARIANT) )
 334     {
 335        m_windowVariant = (wxWindowVariant) wxSystemOptions::GetOptionInt( wxWINDOW_DEFAULT_VARIANT ) ;
 336     }
 337 #endif
 338
 339     // Whether we're using the current theme for this window (wxGTK only for now)
 340     m_themeEnabled = false;
 341
 342     // This is set to true by SendDestroyEvent() which should be called by the
 343     // most derived class to ensure that the destruction event is sent as soon
 344     // as possible to allow its handlers to still see the undestroyed window
 345     m_isBeingDeleted = false;
 346
 347     m_freezeCount = 0;
 348 }
 349
 350 // common part of window creation process
 351 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 352                               wxWindowID id,
 353                               const wxPoint& WXUNUSED(pos),
 354                               const wxSize& size,
 355                               long style,
 356                               const wxString& name)
 357 {
 358     // ids are limited to 16 bits under MSW so if you care about portability,
 359     // it's not a good idea to use ids out of this range (and negative ids are
 360     // reserved for wxWidgets own usage)
 361     wxASSERT_MSG( id == wxID_ANY || (id >= 0 && id < 32767) ||
 362                   (id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST),
 363                   wxT("invalid id value") );
 364
 365     // generate a new id if the user doesn't care about it
 366     if ( id == wxID_ANY )
 367     {
 368         m_windowId = NewControlId();
 369     }
 370     else // valid id specified
 371     {
 372         m_windowId = id;
 373     }
 374
 375     // don't use SetWindowStyleFlag() here, this function should only be called
 376     // to change the flag after creation as it tries to reflect the changes in
 377     // flags by updating the window dynamically and we don't need this here
 378     m_windowStyle = style;
 379
 380     // assume the user doesn't want this window to shrink beneath its initial
 381     // size, this worked like this in wxWidgets 2.8 and before and generally
 382     // often makes sense for child windows (for top level ones it definitely
 383     // does not as the user should be able to resize the window)
 384     //
 385     // note that we can't use IsTopLevel() from ctor
 386     if ( size != wxDefaultSize && !wxTopLevelWindows.Find((wxWindow *)this) )
 387         SetMinSize(size);
 388
 389     SetName(name);
 390     SetParent(parent);
 391
 392     return true;
 393 }
 394
 395 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 396                               wxWindowID id,
 397                               const wxPoint& pos,
 398                               const wxSize& size,
 399                               long style,
 400                               const wxValidator& wxVALIDATOR_PARAM(validator),
 401                               const wxString& name)
 402 {
 403     if ( !CreateBase(parent, id, pos, size, style, name) )
 404         return false;
 405
 406 #if wxUSE_VALIDATORS
 407     SetValidator(validator);
 408 #endif // wxUSE_VALIDATORS
 409
 410     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 411     // have it too - like this it's possible to set it only in the top level
 412     // dialog/frame and all children will inherit it by defult
 413     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 414     {
 415         SetExtraStyle(GetExtraStyle() | wxWS_EX_VALIDATE_RECURSIVELY);
 416     }
 417
 418     return true;
 419 }
 420
 421 bool wxWindowBase::ToggleWindowStyle(int flag)
 422 {
 423     wxASSERT_MSG( flag, wxT("flags with 0 value can't be toggled") );
 424
 425     bool rc;
 426     long style = GetWindowStyleFlag();
 427     if ( style & flag )
 428     {
 429         style &= ~flag;
 430         rc = false;
 431     }
 432     else // currently off
 433     {
 434         style |= flag;
 435         rc = true;
 436     }
 437
 438     SetWindowStyleFlag(style);
 439
 440     return rc;
 441 }
 442
 443 // ----------------------------------------------------------------------------
 444 // destruction
 445 // ----------------------------------------------------------------------------
 446
 447 // common clean up
 448 wxWindowBase::~wxWindowBase()
 449 {
 450     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 451
 452     // FIXME if these 2 cases result from programming errors in the user code
 453     //       we should probably assert here instead of silently fixing them
 454
 455     // Just in case the window has been Closed, but we're then deleting
 456     // immediately: don't leave dangling pointers.
 457     wxPendingDelete.DeleteObject(this);
 458
 459     // Just in case we've loaded a top-level window via LoadNativeDialog but
 460     // we weren't a dialog class
 461     wxTopLevelWindows.DeleteObject((wxWindow*)this);
 462
 463     // Any additional event handlers should be popped before the window is
 464     // deleted as otherwise the last handler will be left with a dangling
 465     // pointer to this window result in a difficult to diagnose crash later on.
 466     wxASSERT_MSG( GetEventHandler() == this,
 467                     wxT("any pushed event handlers must have been removed") );
 468
 469 #if wxUSE_MENUS
 470     // The associated popup menu can still be alive, disassociate from it in
 471     // this case
 472     if ( wxCurrentPopupMenu && wxCurrentPopupMenu->GetInvokingWindow() == this )
 473         wxCurrentPopupMenu->SetInvokingWindow(NULL);
 474 #endif // wxUSE_MENUS
 475
 476     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 477
 478     // notify the parent about this window destruction
 479     if ( m_parent )
 480         m_parent->RemoveChild(this);
 481
 482 #if wxUSE_CARET
 483     delete m_caret;
 484 #endif // wxUSE_CARET
 485
 486 #if wxUSE_VALIDATORS
 487     delete m_windowValidator;
 488 #endif // wxUSE_VALIDATORS
 489
 490 #if wxUSE_CONSTRAINTS
 491     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 492     // at deleted windows as they delete themselves.
 493     DeleteRelatedConstraints();
 494
 495     if ( m_constraints )
 496     {
 497         // This removes any dangling pointers to this window in other windows'
 498         // constraintsInvolvedIn lists.
 499         UnsetConstraints(m_constraints);
 500         wxDELETE(m_constraints);
 501     }
 502 #endif // wxUSE_CONSTRAINTS
 503
 504     if ( m_containingSizer )
 505         m_containingSizer->Detach( (wxWindow*)this );
 506
 507     delete m_windowSizer;
 508
 509 #if wxUSE_DRAG_AND_DROP
 510     delete m_dropTarget;
 511 #endif // wxUSE_DRAG_AND_DROP
 512
 513 #if wxUSE_TOOLTIPS
 514     delete m_tooltip;
 515 #endif // wxUSE_TOOLTIPS
 516
 517 #if wxUSE_ACCESSIBILITY
 518     delete m_accessible;
 519 #endif
 520
 521 #if wxUSE_HELP
 522     // NB: this has to be called unconditionally, because we don't know
 523     //     whether this window has associated help text or not
 524     wxHelpProvider *helpProvider = wxHelpProvider::Get();
 525     if ( helpProvider )
 526         helpProvider->RemoveHelp(this);
 527 #endif
 528 }
 529
 530 bool wxWindowBase::IsBeingDeleted() const
 531 {
 532     return m_isBeingDeleted ||
 533             (!IsTopLevel() && m_parent && m_parent->IsBeingDeleted());
 534 }
 535
 536 void wxWindowBase::SendDestroyEvent()
 537 {
 538     if ( m_isBeingDeleted )
 539     {
 540         // we could have been already called from a more derived class dtor,
 541         // e.g. ~wxTLW calls us and so does ~wxWindow and the latter call
 542         // should be simply ignored
 543         return;
 544     }
 545
 546     m_isBeingDeleted = true;
 547
 548     wxWindowDestroyEvent event;
 549     event.SetEventObject(this);
 550     event.SetId(GetId());
 551     GetEventHandler()->ProcessEvent(event);
 552 }
 553
 554 bool wxWindowBase::Destroy()
 555 {
 556     // If our handle is invalid, it means that this window has never been
 557     // created, either because creating it failed or, more typically, because
 558     // this wxWindow object was default-constructed and its Create() method had
 559     // never been called. As we didn't send wxWindowCreateEvent in this case
 560     // (which is sent after successful creation), don't send the matching
 561     // wxWindowDestroyEvent neither.
 562     if ( GetHandle() )
 563         SendDestroyEvent();
 564
 565     delete this;
 566
 567     return true;
 568 }
 569
 570 bool wxWindowBase::Close(bool force)
 571 {
 572     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 573     event.SetEventObject(this);
 574     event.SetCanVeto(!force);
 575
 576     // return false if window wasn't closed because the application vetoed the
 577     // close event
 578     return HandleWindowEvent(event) && !event.GetVeto();
 579 }
 580
 581 bool wxWindowBase::DestroyChildren()
 582 {
 583     wxWindowList::compatibility_iterator node;
 584     for ( ;; )
 585     {
 586         // we iterate until the list becomes empty
 587         node = GetChildren().GetFirst();
 588         if ( !node )
 589             break;
 590
 591         wxWindow *child = node->GetData();
 592
 593         // note that we really want to delete it immediately so don't call the
 594         // possible overridden Destroy() version which might not delete the
 595         // child immediately resulting in problems with our (top level) child
 596         // outliving its parent
 597         child->wxWindowBase::Destroy();
 598
 599         wxASSERT_MSG( !GetChildren().Find(child),
 600                       wxT("child didn't remove itself using RemoveChild()") );
 601     }
 602
 603     return true;
 604 }
 605
 606 // ----------------------------------------------------------------------------
 607 // size/position related methods
 608 // ----------------------------------------------------------------------------
 609
 610 // centre the window with respect to its parent in either (or both) directions
 611 void wxWindowBase::DoCentre(int dir)
 612 {
 613     wxCHECK_RET( !(dir & wxCENTRE_ON_SCREEN) && GetParent(),
 614                  wxT("this method only implements centering child windows") );
 615
 616     SetSize(GetRect().CentreIn(GetParent()->GetClientSize(), dir));
 617 }
 618
 619 // fits the window around the children
 620 void wxWindowBase::Fit()
 621 {
 622     SetSize(GetBestSize());
 623 }
 624
 625 // fits virtual size (ie. scrolled area etc.) around children
 626 void wxWindowBase::FitInside()
 627 {
 628     SetVirtualSize( GetBestVirtualSize() );
 629 }
 630
 631 // On Mac, scrollbars are explicitly children.
 632 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 633 static bool wxHasRealChildren(const wxWindowBase* win)
 634 {
 635     int realChildCount = 0;
 636
 637     for ( wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 638           node;
 639           node = node->GetNext() )
 640     {
 641         wxWindow *win = node->GetData();
 642         if ( !win->IsTopLevel() && win->IsShown()
 643 #if wxUSE_SCROLLBAR
 644             && !wxDynamicCast(win, wxScrollBar)
 645 #endif
 646             )
 647             realChildCount ++;
 648     }
 649     return (realChildCount > 0);
 650 }
 651 #endif
 652
 653 void wxWindowBase::InvalidateBestSize()
 654 {
 655     m_bestSizeCache = wxDefaultSize;
 656
 657     // parent's best size calculation may depend on its children's
 658     // as long as child window we are in is not top level window itself
 659     // (because the TLW size is never resized automatically)
 660     // so let's invalidate it as well to be safe:
 661     if (m_parent && !IsTopLevel())
 662         m_parent->InvalidateBestSize();
 663 }
 664
 665 // return the size best suited for the current window
 666 wxSize wxWindowBase::DoGetBestSize() const
 667 {
 668     wxSize best;
 669
 670     if ( m_windowSizer )
 671     {
 672         best = m_windowSizer->GetMinSize();
 673     }
 674 #if wxUSE_CONSTRAINTS
 675     else if ( m_constraints )
 676     {
 677         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 678
 679         // our minimal acceptable size is such that all our windows fit inside
 680         int maxX = 0,
 681             maxY = 0;
 682
 683         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 684               node;
 685               node = node->GetNext() )
 686         {
 687             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 688             if ( !c )
 689             {
 690                 // it's not normal that we have an unconstrained child, but
 691                 // what can we do about it?
 692                 continue;
 693             }
 694
 695             int x = c->right.GetValue(),
 696                 y = c->bottom.GetValue();
 697
 698             if ( x > maxX )
 699                 maxX = x;
 700
 701             if ( y > maxY )
 702                 maxY = y;
 703
 704             // TODO: we must calculate the overlaps somehow, otherwise we
 705             //       will never return a size bigger than the current one :-(
 706         }
 707
 708         best = wxSize(maxX, maxY);
 709     }
 710 #endif // wxUSE_CONSTRAINTS
 711     else if ( !GetChildren().empty()
 712 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 713               && wxHasRealChildren(this)
 714 #endif
 715               )
 716     {
 717         // our minimal acceptable size is such that all our visible child
 718         // windows fit inside
 719         int maxX = 0,
 720             maxY = 0;
 721
 722         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 723               node;
 724               node = node->GetNext() )
 725         {
 726             wxWindow *win = node->GetData();
 727             if ( win->IsTopLevel()
 728                     || !win->IsShown()
 729 #if wxUSE_STATUSBAR
 730                         || wxDynamicCast(win, wxStatusBar)
 731 #endif // wxUSE_STATUSBAR
 732                )
 733             {
 734                 // dialogs and frames lie in different top level windows -
 735                 // don't deal with them here; as for the status bars, they
 736                 // don't lie in the client area at all
 737                 continue;
 738             }
 739
 740             int wx, wy, ww, wh;
 741             win->GetPosition(&wx, &wy);
 742
 743             // if the window hadn't been positioned yet, assume that it is in
 744             // the origin
 745             if ( wx == wxDefaultCoord )
 746                 wx = 0;
 747             if ( wy == wxDefaultCoord )
 748                 wy = 0;
 749
 750             win->GetSize(&ww, &wh);
 751             if ( wx + ww > maxX )
 752                 maxX = wx + ww;
 753             if ( wy + wh > maxY )
 754                 maxY = wy + wh;
 755         }
 756
 757         best = wxSize(maxX, maxY);
 758     }
 759     else // ! has children
 760     {
 761         wxSize size = GetMinSize();
 762         if ( !size.IsFullySpecified() )
 763         {
 764             // if the window doesn't define its best size we assume that it can
 765             // be arbitrarily small -- usually this is not the case, of course,
 766             // but we have no way to know what the limit is, it should really
 767             // override DoGetBestClientSize() itself to tell us
 768             size.SetDefaults(wxSize(1, 1));
 769         }
 770
 771         // return as-is, unadjusted by the client size difference.
 772         return size;
 773     }
 774
 775     // Add any difference between size and client size
 776     wxSize diff = GetSize() - GetClientSize();
 777     best.x += wxMax(0, diff.x);
 778     best.y += wxMax(0, diff.y);
 779
 780     return best;
 781 }
 782
 783 // helper of GetWindowBorderSize(): as many ports don't implement support for
 784 // wxSYS_BORDER/EDGE_X/Y metrics in their wxSystemSettings, use hard coded
 785 // fallbacks in this case
 786 static int wxGetMetricOrDefault(wxSystemMetric what, const wxWindowBase* win)
 787 {
 788     int rc = wxSystemSettings::GetMetric(
 789         what, static_cast<wxWindow*>(const_cast<wxWindowBase*>(win)));
 790     if ( rc == -1 )
 791     {
 792         switch ( what )
 793         {
 794             case wxSYS_BORDER_X:
 795             case wxSYS_BORDER_Y:
 796                 // 2D border is by default 1 pixel wide
 797                 rc = 1;
 798                 break;
 799
 800             case wxSYS_EDGE_X:
 801             case wxSYS_EDGE_Y:
 802                 // 3D borders are by default 2 pixels
 803                 rc = 2;
 804                 break;
 805
 806             default:
 807                 wxFAIL_MSG( wxT("unexpected wxGetMetricOrDefault() argument") );
 808                 rc = 0;
 809         }
 810     }
 811
 812     return rc;
 813 }
 814
 815 wxSize wxWindowBase::GetWindowBorderSize() const
 816 {
 817     wxSize size;
 818
 819     switch ( GetBorder() )
 820     {
 821         case wxBORDER_NONE:
 822             // nothing to do, size is already (0, 0)
 823             break;
 824
 825         case wxBORDER_SIMPLE:
 826         case wxBORDER_STATIC:
 827             size.x = wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 828             size.y = wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 829             break;
 830
 831         case wxBORDER_SUNKEN:
 832         case wxBORDER_RAISED:
 833             size.x = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_X, this),
 834                            wxGetMetricOrDefault(wxSYS_BORDER_X, this));
 835             size.y = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_Y, this),
 836                            wxGetMetricOrDefault(wxSYS_BORDER_Y, this));
 837             break;
 838
 839         case wxBORDER_DOUBLE:
 840             size.x = wxGetMetricOrDefault(wxSYS_EDGE_X, this) +
 841                         wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 842             size.y = wxGetMetricOrDefault(wxSYS_EDGE_Y, this) +
 843                         wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 844             break;
 845
 846         default:
 847             wxFAIL_MSG(wxT("Unknown border style."));
 848             break;
 849     }
 850
 851     // we have borders on both sides
 852     return size*2;
 853 }
 854
 855 bool
 856 wxWindowBase::InformFirstDirection(int direction,
 857                                    int size,
 858                                    int availableOtherDir)
 859 {
 860     return GetSizer() && GetSizer()->InformFirstDirection(direction,
 861                                                           size,
 862                                                           availableOtherDir);
 863 }
 864
 865 wxSize wxWindowBase::GetEffectiveMinSize() const
 866 {
 867     // merge the best size with the min size, giving priority to the min size
 868     wxSize min = GetMinSize();
 869
 870     if (min.x == wxDefaultCoord || min.y == wxDefaultCoord)
 871     {
 872         wxSize best = GetBestSize();
 873         if (min.x == wxDefaultCoord) min.x =  best.x;
 874         if (min.y == wxDefaultCoord) min.y =  best.y;
 875     }
 876
 877     return min;
 878 }
 879
 880 wxSize wxWindowBase::DoGetBorderSize() const
 881 {
 882     // there is one case in which we can implement it for all ports easily
 883     if ( GetBorder() == wxBORDER_NONE )
 884         return wxSize(0, 0);
 885
 886     // otherwise use the difference between the real size and the client size
 887     // as a fallback: notice that this is incorrect in general as client size
 888     // also doesn't take the scrollbars into account
 889     return GetSize() - GetClientSize();
 890 }
 891
 892 wxSize wxWindowBase::GetBestSize() const
 893 {
 894     if ( !m_windowSizer && m_bestSizeCache.IsFullySpecified() )
 895         return m_bestSizeCache;
 896
 897     // call DoGetBestClientSize() first, if a derived class overrides it wants
 898     // it to be used
 899     wxSize size = DoGetBestClientSize();
 900     if ( size != wxDefaultSize )
 901         size += DoGetBorderSize();
 902     else
 903         size = DoGetBestSize();
 904
 905     // Ensure that the best size is at least as large as min size.
 906     size.IncTo(GetMinSize());
 907
 908     // And not larger than max size.
 909     size.DecToIfSpecified(GetMaxSize());
 910
 911     // Finally cache result and return.
 912     CacheBestSize(size);
 913     return size;
 914 }
 915
 916 int wxWindowBase::GetBestHeight(int width) const
 917 {
 918     const int height = DoGetBestClientHeight(width);
 919
 920     return height == wxDefaultCoord
 921             ? GetBestSize().y
 922             : height + DoGetBorderSize().y;
 923 }
 924
 925 int wxWindowBase::GetBestWidth(int height) const
 926 {
 927     const int width = DoGetBestClientWidth(height);
 928
 929     return width == wxDefaultCoord
 930             ? GetBestSize().x
 931             : width + DoGetBorderSize().x;
 932 }
 933
 934 void wxWindowBase::SetMinSize(const wxSize& minSize)
 935 {
 936     m_minWidth = minSize.x;
 937     m_minHeight = minSize.y;
 938
 939     InvalidateBestSize();
 940 }
 941
 942 void wxWindowBase::SetMaxSize(const wxSize& maxSize)
 943 {
 944     m_maxWidth = maxSize.x;
 945     m_maxHeight = maxSize.y;
 946
 947     InvalidateBestSize();
 948 }
 949
 950 void wxWindowBase::SetInitialSize(const wxSize& size)
 951 {
 952     // Set the min size to the size passed in.  This will usually either be
 953     // wxDefaultSize or the size passed to this window's ctor/Create function.
 954     SetMinSize(size);
 955
 956     // Merge the size with the best size if needed
 957     wxSize best = GetEffectiveMinSize();
 958
 959     // If the current size doesn't match then change it
 960     if (GetSize() != best)
 961         SetSize(best);
 962 }
 963
 964
 965 // by default the origin is not shifted
 966 wxPoint wxWindowBase::GetClientAreaOrigin() const
 967 {
 968     return wxPoint(0,0);
 969 }
 970
 971 wxSize wxWindowBase::ClientToWindowSize(const wxSize& size) const
 972 {
 973     const wxSize diff(GetSize() - GetClientSize());
 974
 975     return wxSize(size.x == -1 ? -1 : size.x + diff.x,
 976                   size.y == -1 ? -1 : size.y + diff.y);
 977 }
 978
 979 wxSize wxWindowBase::WindowToClientSize(const wxSize& size) const
 980 {
 981     const wxSize diff(GetSize() - GetClientSize());
 982
 983     return wxSize(size.x == -1 ? -1 : size.x - diff.x,
 984                   size.y == -1 ? -1 : size.y - diff.y);
 985 }
 986
 987 void wxWindowBase::SetWindowVariant( wxWindowVariant variant )
 988 {
 989     if ( m_windowVariant != variant )
 990     {
 991         m_windowVariant = variant;
 992
 993         DoSetWindowVariant(variant);
 994     }
 995 }
 996
 997 void wxWindowBase::DoSetWindowVariant( wxWindowVariant variant )
 998 {
 999     // adjust the font height to correspond to our new variant (notice that
1000     // we're only called if something really changed)
1001     wxFont font = GetFont();
1002     int size = font.GetPointSize();
1003     switch ( variant )
1004     {
1005         case wxWINDOW_VARIANT_NORMAL:
1006             break;
1007
1008         case wxWINDOW_VARIANT_SMALL:
1009             size = wxRound(size * 3.0 / 4.0);
1010             break;
1011
1012         case wxWINDOW_VARIANT_MINI:
1013             size = wxRound(size * 2.0 / 3.0);
1014             break;
1015
1016         case wxWINDOW_VARIANT_LARGE:
1017             size = wxRound(size * 5.0 / 4.0);
1018             break;
1019
1020         default:
1021             wxFAIL_MSG(wxT("unexpected window variant"));
1022             break;
1023     }
1024
1025     font.SetPointSize(size);
1026     SetFont(font);
1027 }
1028
1029 void wxWindowBase::DoSetSizeHints( int minW, int minH,
1030                                    int maxW, int maxH,
1031                                    int WXUNUSED(incW), int WXUNUSED(incH) )
1032 {
1033     wxCHECK_RET( (minW == wxDefaultCoord || maxW == wxDefaultCoord || minW <= maxW) &&
1034                     (minH == wxDefaultCoord || maxH == wxDefaultCoord || minH <= maxH),
1035                  wxT("min width/height must be less than max width/height!") );
1036
1037     m_minWidth = minW;
1038     m_maxWidth = maxW;
1039     m_minHeight = minH;
1040     m_maxHeight = maxH;
1041 }
1042
1043
1044 #if WXWIN_COMPATIBILITY_2_8
1045 void wxWindowBase::SetVirtualSizeHints(int WXUNUSED(minW), int WXUNUSED(minH),
1046                                        int WXUNUSED(maxW), int WXUNUSED(maxH))
1047 {
1048 }
1049
1050 void wxWindowBase::SetVirtualSizeHints(const wxSize& WXUNUSED(minsize),
1051                                        const wxSize& WXUNUSED(maxsize))
1052 {
1053 }
1054 #endif // WXWIN_COMPATIBILITY_2_8
1055
1056 void wxWindowBase::DoSetVirtualSize( int x, int y )
1057 {
1058     m_virtualSize = wxSize(x, y);
1059 }
1060
1061 wxSize wxWindowBase::DoGetVirtualSize() const
1062 {
1063     // we should use the entire client area so if it is greater than our
1064     // virtual size, expand it to fit (otherwise if the window is big enough we
1065     // wouldn't be using parts of it)
1066     wxSize size = GetClientSize();
1067     if ( m_virtualSize.x > size.x )
1068         size.x = m_virtualSize.x;
1069
1070     if ( m_virtualSize.y >= size.y )
1071         size.y = m_virtualSize.y;
1072
1073     return size;
1074 }
1075
1076 void wxWindowBase::DoGetScreenPosition(int *x, int *y) const
1077 {
1078     // screen position is the same as (0, 0) in client coords for non TLWs (and
1079     // TLWs override this method)
1080     if ( x )
1081         *x = 0;
1082     if ( y )
1083         *y = 0;
1084
1085     ClientToScreen(x, y);
1086 }
1087
1088 void wxWindowBase::SendSizeEvent(int flags)
1089 {
1090     wxSizeEvent event(GetSize(), GetId());
1091     event.SetEventObject(this);
1092     if ( flags & wxSEND_EVENT_POST )
1093         wxPostEvent(GetEventHandler(), event);
1094     else
1095         HandleWindowEvent(event);
1096 }
1097
1098 void wxWindowBase::SendSizeEventToParent(int flags)
1099 {
1100     wxWindow * const parent = GetParent();
1101     if ( parent && !parent->IsBeingDeleted() )
1102         parent->SendSizeEvent(flags);
1103 }
1104
1105 bool wxWindowBase::HasScrollbar(int orient) const
1106 {
1107     // if scrolling in the given direction is disabled, we can't have the
1108     // corresponding scrollbar no matter what
1109     if ( !CanScroll(orient) )
1110         return false;
1111
1112     const wxSize sizeVirt = GetVirtualSize();
1113     const wxSize sizeClient = GetClientSize();
1114
1115     return orient == wxHORIZONTAL ? sizeVirt.x > sizeClient.x
1116                                   : sizeVirt.y > sizeClient.y;
1117 }
1118
1119 // ----------------------------------------------------------------------------
1120 // show/hide/enable/disable the window
1121 // ----------------------------------------------------------------------------
1122
1123 bool wxWindowBase::Show(bool show)
1124 {
1125     if ( show != m_isShown )
1126     {
1127         m_isShown = show;
1128
1129         return true;
1130     }
1131     else
1132     {
1133         return false;
1134     }
1135 }
1136
1137 bool wxWindowBase::IsEnabled() const
1138 {
1139     return IsThisEnabled() && (IsTopLevel() || !GetParent() || GetParent()->IsEnabled());
1140 }
1141
1142 void wxWindowBase::NotifyWindowOnEnableChange(bool enabled)
1143 {
1144     // Under some platforms there is no need to update the window state
1145     // explicitly, it will become disabled when its parent is. On other ones we
1146     // do need to disable all windows recursively though.
1147 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
1148     DoEnable(enabled);
1149 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
1150
1151     // Disabling a top level window is typically done when showing a modal
1152     // dialog and we don't need to disable its children in this case, they will
1153     // be logically disabled anyhow (i.e. their IsEnabled() will return false)
1154     // and the TLW won't accept any input for them. Moreover, explicitly
1155     // disabling them would look ugly as the entire TLW would be greyed out
1156     // whenever a modal dialog is shown and no native applications under any
1157     // platform behave like this.
1158     if ( IsTopLevel() && !enabled )
1159         return;
1160
1161     // When disabling (or enabling back) a non-TLW window we need to
1162     // recursively propagate the change of the state to its children, otherwise
1163     // they would still show as enabled even though they wouldn't actually
1164     // accept any input (at least under MSW where children don't accept input
1165     // if any of the windows in their parent chain is enabled).
1166 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
1167     for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1168           node;
1169           node = node->GetNext() )
1170     {
1171         wxWindowBase * const child = node->GetData();
1172         if ( !child->IsTopLevel() && child->IsThisEnabled() )
1173             child->NotifyWindowOnEnableChange(enabled);
1174     }
1175 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
1176 }
1177
1178 bool wxWindowBase::Enable(bool enable)
1179 {
1180     if ( enable == IsThisEnabled() )
1181         return false;
1182
1183     m_isEnabled = enable;
1184
1185     // If we call DoEnable() from NotifyWindowOnEnableChange(), we don't need
1186     // to do it from here.
1187 #ifdef wxHAS_NATIVE_ENABLED_MANAGEMENT
1188     DoEnable(enable);
1189 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
1190
1191     NotifyWindowOnEnableChange(enable);
1192
1193     return true;
1194 }
1195
1196 bool wxWindowBase::IsShownOnScreen() const
1197 {
1198     // A window is shown on screen if it itself is shown and so are all its
1199     // parents. But if a window is toplevel one, then its always visible on
1200     // screen if IsShown() returns true, even if it has a hidden parent.
1201     return IsShown() &&
1202            (IsTopLevel() || GetParent() == NULL || GetParent()->IsShownOnScreen());
1203 }
1204
1205 // ----------------------------------------------------------------------------
1206 // RTTI
1207 // ----------------------------------------------------------------------------
1208
1209 bool wxWindowBase::IsTopLevel() const
1210 {
1211     return false;
1212 }
1213
1214 // ----------------------------------------------------------------------------
1215 // Freeze/Thaw
1216 // ----------------------------------------------------------------------------
1217
1218 void wxWindowBase::Freeze()
1219 {
1220     if ( !m_freezeCount++ )
1221     {
1222         // physically freeze this window:
1223         DoFreeze();
1224
1225         // and recursively freeze all children:
1226         for ( wxWindowList::iterator i = GetChildren().begin();
1227               i != GetChildren().end(); ++i )
1228         {
1229             wxWindow *child = *i;
1230             if ( child->IsTopLevel() )
1231                 continue;
1232
1233             child->Freeze();
1234         }
1235     }
1236 }
1237
1238 void wxWindowBase::Thaw()
1239 {
1240     wxASSERT_MSG( m_freezeCount, "Thaw() without matching Freeze()" );
1241
1242     if ( !--m_freezeCount )
1243     {
1244         // recursively thaw all children:
1245         for ( wxWindowList::iterator i = GetChildren().begin();
1246               i != GetChildren().end(); ++i )
1247         {
1248             wxWindow *child = *i;
1249             if ( child->IsTopLevel() )
1250                 continue;
1251
1252             child->Thaw();
1253         }
1254
1255         // physically thaw this window:
1256         DoThaw();
1257     }
1258 }
1259
1260 // ----------------------------------------------------------------------------
1261 // Dealing with parents and children.
1262 // ----------------------------------------------------------------------------
1263
1264 bool wxWindowBase::IsDescendant(wxWindowBase* win) const
1265 {
1266     // Iterate until we find this window in the parent chain or exhaust it.
1267     while ( win )
1268     {
1269         if ( win == this )
1270             return true;
1271
1272         // Stop iterating on reaching the top level window boundary.
1273         if ( win->IsTopLevel() )
1274             break;
1275
1276         win = win->GetParent();
1277     }
1278
1279     return false;
1280 }
1281
1282 void wxWindowBase::AddChild(wxWindowBase *child)
1283 {
1284     wxCHECK_RET( child, wxT("can't add a NULL child") );
1285
1286     // this should never happen and it will lead to a crash later if it does
1287     // because RemoveChild() will remove only one node from the children list
1288     // and the other(s) one(s) will be left with dangling pointers in them
1289     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), wxT("AddChild() called twice") );
1290
1291     GetChildren().Append((wxWindow*)child);
1292     child->SetParent(this);
1293
1294     // adding a child while frozen will assert when thawed, so freeze it as if
1295     // it had been already present when we were frozen
1296     if ( IsFrozen() && !child->IsTopLevel() )
1297         child->Freeze();
1298 }
1299
1300 void wxWindowBase::RemoveChild(wxWindowBase *child)
1301 {
1302     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1303
1304     // removing a child while frozen may result in permanently frozen window
1305     // if used e.g. from Reparent(), so thaw it
1306     //
1307     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1308     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1309     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1310         child->Thaw();
1311
1312     GetChildren().DeleteObject((wxWindow *)child);
1313     child->SetParent(NULL);
1314 }
1315
1316 void wxWindowBase::SetParent(wxWindowBase *parent)
1317 {
1318     // This assert catches typos which may result in using "this" instead of
1319     // "parent" when creating the window. This doesn't happen often but when it
1320     // does the results are unpleasant because the program typically just
1321     // crashes when due to a stack overflow or something similar and this
1322     // assert doesn't cost much (OTOH doing a more general check that the
1323     // parent is not one of our children would be more expensive and probably
1324     // not worth it).
1325     wxASSERT_MSG( parent != this, wxS("Can't use window as its own parent") );
1326
1327     m_parent = (wxWindow *)parent;
1328 }
1329
1330 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1331 {
1332     wxWindow *oldParent = GetParent();
1333     if ( newParent == oldParent )
1334     {
1335         // nothing done
1336         return false;
1337     }
1338
1339     const bool oldEnabledState = IsEnabled();
1340
1341     // unlink this window from the existing parent.
1342     if ( oldParent )
1343     {
1344         oldParent->RemoveChild(this);
1345     }
1346     else
1347     {
1348         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1349     }
1350
1351     // add it to the new one
1352     if ( newParent )
1353     {
1354         newParent->AddChild(this);
1355     }
1356     else
1357     {
1358         wxTopLevelWindows.Append((wxWindow *)this);
1359     }
1360
1361     // We need to notify window (and its subwindows) if by changing the parent
1362     // we also change our enabled/disabled status.
1363     const bool newEnabledState = IsEnabled();
1364     if ( newEnabledState != oldEnabledState )
1365     {
1366         NotifyWindowOnEnableChange(newEnabledState);
1367     }
1368
1369     return true;
1370 }
1371
1372 // ----------------------------------------------------------------------------
1373 // event handler stuff
1374 // ----------------------------------------------------------------------------
1375
1376 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1377 {
1378     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1379
1380     m_eventHandler = handler;
1381 }
1382
1383 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1384 {
1385     // disable wxEvtHandler chain mechanism for wxWindows:
1386     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1387
1388     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1389 }
1390 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1391 {
1392     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1393     // handler of our stack when is destroyed will be Unlink()ed and thus
1394     // will call this function to update the pointer of this window...
1395
1396     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1397 }
1398
1399 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1400 {
1401     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1402
1403     // the new handler is going to be part of the wxWindow stack of event handlers:
1404     // it can't be part also of an event handler double-linked chain:
1405     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1406         "The handler being pushed in the wxWindow stack shouldn't be part of "
1407         "a wxEvtHandler chain; call Unlink() on it first");
1408
1409     wxEvtHandler *handlerOld = GetEventHandler();
1410     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1411
1412     // now use wxEvtHandler double-linked list to implement a stack:
1413     handlerToPush->SetNextHandler(handlerOld);
1414
1415     if (handlerOld != this)
1416         handlerOld->SetPreviousHandler(handlerToPush);
1417
1418     SetEventHandler(handlerToPush);
1419
1420 #if wxDEBUG_LEVEL
1421     // final checks of the operations done above:
1422     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1423         "the first handler of the wxWindow stack should "
1424         "have no previous handlers set" );
1425     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1426         "the first handler of the wxWindow stack should "
1427         "have non-NULL next handler" );
1428
1429     wxEvtHandler* pLast = handlerToPush;
1430     while ( pLast && pLast != this )
1431         pLast = pLast->GetNextHandler();
1432     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1433         "the last handler of the wxWindow stack should "
1434         "have this window as next handler" );
1435 #endif // wxDEBUG_LEVEL
1436 }
1437
1438 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1439 {
1440     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1441
1442     wxEvtHandler *firstHandler = GetEventHandler();
1443     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1444     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1445     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1446         "the first handler of the wxWindow stack should have no previous handlers set" );
1447
1448     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1449     wxCHECK_MSG( secondHandler != NULL, NULL,
1450         "the first handler of the wxWindow stack should have non-NULL next handler" );
1451
1452     firstHandler->SetNextHandler(NULL);
1453
1454     // It is harmless but useless to unset the previous handler of the window
1455     // itself as it's always NULL anyhow, so don't do this.
1456     if ( secondHandler != this )
1457         secondHandler->SetPreviousHandler(NULL);
1458
1459     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1460     SetEventHandler(secondHandler);
1461
1462     if ( deleteHandler )
1463     {
1464         wxDELETE(firstHandler);
1465     }
1466
1467     return firstHandler;
1468 }
1469
1470 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1471 {
1472     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1473     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1474
1475     if (handlerToRemove == GetEventHandler())
1476     {
1477         // removing the first event handler is equivalent to "popping" the stack
1478         PopEventHandler(false);
1479         return true;
1480     }
1481
1482     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1483     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1484     while ( handlerCur != this && handlerCur )
1485     {
1486         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1487
1488         if ( handlerCur == handlerToRemove )
1489         {
1490             handlerCur->Unlink();
1491
1492             wxASSERT_MSG( handlerCur != GetEventHandler(),
1493                         "the case Remove == Pop should was already handled" );
1494             return true;
1495         }
1496
1497         handlerCur = handlerNext;
1498     }
1499
1500     wxFAIL_MSG( wxT("where has the event handler gone?") );
1501
1502     return false;
1503 }
1504
1505 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1506 {
1507     // SafelyProcessEvent() will handle exceptions nicely
1508     return GetEventHandler()->SafelyProcessEvent(event);
1509 }
1510
1511 // ----------------------------------------------------------------------------
1512 // colours, fonts &c
1513 // ----------------------------------------------------------------------------
1514
1515 void wxWindowBase::InheritAttributes()
1516 {
1517     const wxWindowBase * const parent = GetParent();
1518     if ( !parent )
1519         return;
1520
1521     // we only inherit attributes which had been explicitly set for the parent
1522     // which ensures that this only happens if the user really wants it and
1523     // not by default which wouldn't make any sense in modern GUIs where the
1524     // controls don't all use the same fonts (nor colours)
1525     if ( parent->m_inheritFont && !m_hasFont )
1526         SetFont(parent->GetFont());
1527
1528     // in addition, there is a possibility to explicitly forbid inheriting
1529     // colours at each class level by overriding ShouldInheritColours()
1530     if ( ShouldInheritColours() )
1531     {
1532         if ( parent->m_inheritFgCol && !m_hasFgCol )
1533             SetForegroundColour(parent->GetForegroundColour());
1534
1535         // inheriting (solid) background colour is wrong as it totally breaks
1536         // any kind of themed backgrounds
1537         //
1538         // instead, the controls should use the same background as their parent
1539         // (ideally by not drawing it at all)
1540 #if 0
1541         if ( parent->m_inheritBgCol && !m_hasBgCol )
1542             SetBackgroundColour(parent->GetBackgroundColour());
1543 #endif // 0
1544     }
1545 }
1546
1547 /* static */ wxVisualAttributes
1548 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1549 {
1550     // it is important to return valid values for all attributes from here,
1551     // GetXXX() below rely on this
1552     wxVisualAttributes attrs;
1553     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1554     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1555
1556     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1557     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1558     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1559     // colour on other platforms.
1560
1561 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1562     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1563 #else
1564     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1565 #endif
1566     return attrs;
1567 }
1568
1569 wxColour wxWindowBase::GetBackgroundColour() const
1570 {
1571     if ( !m_backgroundColour.IsOk() )
1572     {
1573         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1574
1575         // get our default background colour
1576         wxColour colBg = GetDefaultAttributes().colBg;
1577
1578         // we must return some valid colour to avoid redoing this every time
1579         // and also to avoid surprising the applications written for older
1580         // wxWidgets versions where GetBackgroundColour() always returned
1581         // something -- so give them something even if it doesn't make sense
1582         // for this window (e.g. it has a themed background)
1583         if ( !colBg.IsOk() )
1584             colBg = GetClassDefaultAttributes().colBg;
1585
1586         return colBg;
1587     }
1588     else
1589         return m_backgroundColour;
1590 }
1591
1592 wxColour wxWindowBase::GetForegroundColour() const
1593 {
1594     // logic is the same as above
1595     if ( !m_hasFgCol && !m_foregroundColour.IsOk() )
1596     {
1597         wxColour colFg = GetDefaultAttributes().colFg;
1598
1599         if ( !colFg.IsOk() )
1600             colFg = GetClassDefaultAttributes().colFg;
1601
1602         return colFg;
1603     }
1604     else
1605         return m_foregroundColour;
1606 }
1607
1608 bool wxWindowBase::SetBackgroundStyle(wxBackgroundStyle style)
1609 {
1610     // The checks below shouldn't be triggered if we're not really changing the
1611     // style.
1612     if ( style == m_backgroundStyle )
1613         return true;
1614
1615     // Transparent background style can be only set before creation because of
1616     // wxGTK limitation.
1617     wxCHECK_MSG( (style != wxBG_STYLE_TRANSPARENT) || !GetHandle(),
1618                  false,
1619                  "wxBG_STYLE_TRANSPARENT style can only be set before "
1620                  "Create()-ing the window." );
1621
1622     // And once it is set, wxBG_STYLE_TRANSPARENT can't be unset.
1623     wxCHECK_MSG( (m_backgroundStyle != wxBG_STYLE_TRANSPARENT) ||
1624                  (style == wxBG_STYLE_TRANSPARENT),
1625                  false,
1626                  "wxBG_STYLE_TRANSPARENT can't be unset once it was set." );
1627
1628     m_backgroundStyle = style;
1629
1630     return true;
1631 }
1632
1633 bool wxWindowBase::IsTransparentBackgroundSupported(wxString *reason) const
1634 {
1635     if ( reason )
1636         *reason = _("This platform does not support background transparency.");
1637
1638     return false;
1639 }
1640
1641 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1642 {
1643     if ( colour == m_backgroundColour )
1644         return false;
1645
1646     m_hasBgCol = colour.IsOk();
1647
1648     m_inheritBgCol = m_hasBgCol;
1649     m_backgroundColour = colour;
1650     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.IsOk() );
1651     return true;
1652 }
1653
1654 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1655 {
1656     if (colour == m_foregroundColour )
1657         return false;
1658
1659     m_hasFgCol = colour.IsOk();
1660     m_inheritFgCol = m_hasFgCol;
1661     m_foregroundColour = colour;
1662     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.IsOk() );
1663     return true;
1664 }
1665
1666 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1667 {
1668     // setting an invalid cursor is ok, it means that we don't have any special
1669     // cursor
1670     if ( m_cursor.IsSameAs(cursor) )
1671     {
1672         // no change
1673         return false;
1674     }
1675
1676     m_cursor = cursor;
1677
1678     return true;
1679 }
1680
1681 wxFont wxWindowBase::GetFont() const
1682 {
1683     // logic is the same as in GetBackgroundColour()
1684     if ( !m_font.IsOk() )
1685     {
1686         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1687
1688         wxFont font = GetDefaultAttributes().font;
1689         if ( !font.IsOk() )
1690             font = GetClassDefaultAttributes().font;
1691
1692         return font;
1693     }
1694     else
1695         return m_font;
1696 }
1697
1698 bool wxWindowBase::SetFont(const wxFont& font)
1699 {
1700     if ( font == m_font )
1701     {
1702         // no change
1703         return false;
1704     }
1705
1706     m_font = font;
1707     m_hasFont = font.IsOk();
1708     m_inheritFont = m_hasFont;
1709
1710     InvalidateBestSize();
1711
1712     return true;
1713 }
1714
1715 #if wxUSE_PALETTE
1716
1717 void wxWindowBase::SetPalette(const wxPalette& pal)
1718 {
1719     m_hasCustomPalette = true;
1720     m_palette = pal;
1721
1722     // VZ: can anyone explain me what do we do here?
1723     wxWindowDC d((wxWindow *) this);
1724     d.SetPalette(pal);
1725 }
1726
1727 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1728 {
1729     wxWindow *win = (wxWindow *)this;
1730     while ( win && !win->HasCustomPalette() )
1731     {
1732         win = win->GetParent();
1733     }
1734
1735     return win;
1736 }
1737
1738 #endif // wxUSE_PALETTE
1739
1740 #if wxUSE_CARET
1741 void wxWindowBase::SetCaret(wxCaret *caret)
1742 {
1743     if ( m_caret )
1744     {
1745         delete m_caret;
1746     }
1747
1748     m_caret = caret;
1749
1750     if ( m_caret )
1751     {
1752         wxASSERT_MSG( m_caret->GetWindow() == this,
1753                       wxT("caret should be created associated to this window") );
1754     }
1755 }
1756 #endif // wxUSE_CARET
1757
1758 #if wxUSE_VALIDATORS
1759 // ----------------------------------------------------------------------------
1760 // validators
1761 // ----------------------------------------------------------------------------
1762
1763 void wxWindowBase::SetValidator(const wxValidator& validator)
1764 {
1765     if ( m_windowValidator )
1766         delete m_windowValidator;
1767
1768     m_windowValidator = (wxValidator *)validator.Clone();
1769
1770     if ( m_windowValidator )
1771         m_windowValidator->SetWindow(this);
1772 }
1773 #endif // wxUSE_VALIDATORS
1774
1775 // ----------------------------------------------------------------------------
1776 // update region stuff
1777 // ----------------------------------------------------------------------------
1778
1779 wxRect wxWindowBase::GetUpdateClientRect() const
1780 {
1781     wxRegion rgnUpdate = GetUpdateRegion();
1782     rgnUpdate.Intersect(GetClientRect());
1783     wxRect rectUpdate = rgnUpdate.GetBox();
1784     wxPoint ptOrigin = GetClientAreaOrigin();
1785     rectUpdate.x -= ptOrigin.x;
1786     rectUpdate.y -= ptOrigin.y;
1787
1788     return rectUpdate;
1789 }
1790
1791 bool wxWindowBase::DoIsExposed(int x, int y) const
1792 {
1793     return m_updateRegion.Contains(x, y) != wxOutRegion;
1794 }
1795
1796 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1797 {
1798     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1799 }
1800
1801 void wxWindowBase::ClearBackground()
1802 {
1803     // wxGTK uses its own version, no need to add never used code
1804 #ifndef __WXGTK__
1805     wxClientDC dc((wxWindow *)this);
1806     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1807     dc.SetBackground(brush);
1808     dc.Clear();
1809 #endif // __WXGTK__
1810 }
1811
1812 // ----------------------------------------------------------------------------
1813 // find child window by id or name
1814 // ----------------------------------------------------------------------------
1815
1816 wxWindow *wxWindowBase::FindWindow(long id) const
1817 {
1818     if ( id == m_windowId )
1819         return (wxWindow *)this;
1820
1821     wxWindowBase *res = NULL;
1822     wxWindowList::compatibility_iterator node;
1823     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1824     {
1825         wxWindowBase *child = node->GetData();
1826         res = child->FindWindow( id );
1827     }
1828
1829     return (wxWindow *)res;
1830 }
1831
1832 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1833 {
1834     if ( name == m_windowName )
1835         return (wxWindow *)this;
1836
1837     wxWindowBase *res = NULL;
1838     wxWindowList::compatibility_iterator node;
1839     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1840     {
1841         wxWindow *child = node->GetData();
1842         res = child->FindWindow(name);
1843     }
1844
1845     return (wxWindow *)res;
1846 }
1847
1848
1849 // find any window by id or name or label: If parent is non-NULL, look through
1850 // children for a label or title matching the specified string. If NULL, look
1851 // through all top-level windows.
1852 //
1853 // to avoid duplicating code we reuse the same helper function but with
1854 // different comparators
1855
1856 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1857                                 const wxString& label, long id);
1858
1859 static
1860 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1861                            long WXUNUSED(id))
1862 {
1863     return win->GetLabel() == label;
1864 }
1865
1866 static
1867 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1868                           long WXUNUSED(id))
1869 {
1870     return win->GetName() == label;
1871 }
1872
1873 static
1874 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1875                         long id)
1876 {
1877     return win->GetId() == id;
1878 }
1879
1880 // recursive helper for the FindWindowByXXX() functions
1881 static
1882 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1883                                   const wxString& label,
1884                                   long id,
1885                                   wxFindWindowCmp cmp)
1886 {
1887     if ( parent )
1888     {
1889         // see if this is the one we're looking for
1890         if ( (*cmp)(parent, label, id) )
1891             return (wxWindow *)parent;
1892
1893         // It wasn't, so check all its children
1894         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1895               node;
1896               node = node->GetNext() )
1897         {
1898             // recursively check each child
1899             wxWindow *win = (wxWindow *)node->GetData();
1900             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1901             if (retwin)
1902                 return retwin;
1903         }
1904     }
1905
1906     // Not found
1907     return NULL;
1908 }
1909
1910 // helper for FindWindowByXXX()
1911 static
1912 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1913                              const wxString& label,
1914                              long id,
1915                              wxFindWindowCmp cmp)
1916 {
1917     if ( parent )
1918     {
1919         // just check parent and all its children
1920         return wxFindWindowRecursively(parent, label, id, cmp);
1921     }
1922
1923     // start at very top of wx's windows
1924     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1925           node;
1926           node = node->GetNext() )
1927     {
1928         // recursively check each window & its children
1929         wxWindow *win = node->GetData();
1930         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1931         if (retwin)
1932             return retwin;
1933     }
1934
1935     return NULL;
1936 }
1937
1938 /* static */
1939 wxWindow *
1940 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1941 {
1942     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1943 }
1944
1945 /* static */
1946 wxWindow *
1947 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1948 {
1949     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1950
1951     if ( !win )
1952     {
1953         // fall back to the label
1954         win = FindWindowByLabel(title, parent);
1955     }
1956
1957     return win;
1958 }
1959
1960 /* static */
1961 wxWindow *
1962 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1963 {
1964     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1965 }
1966
1967 // ----------------------------------------------------------------------------
1968 // dialog oriented functions
1969 // ----------------------------------------------------------------------------
1970
1971 #if WXWIN_COMPATIBILITY_2_8
1972 void wxWindowBase::MakeModal(bool modal)
1973 {
1974     // Disable all other windows
1975     if ( IsTopLevel() )
1976     {
1977         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1978         while (node)
1979         {
1980             wxWindow *win = node->GetData();
1981             if (win != this)
1982                 win->Enable(!modal);
1983
1984             node = node->GetNext();
1985         }
1986     }
1987 }
1988 #endif // WXWIN_COMPATIBILITY_2_8
1989
1990 #if wxUSE_VALIDATORS
1991
1992 namespace
1993 {
1994
1995 // This class encapsulates possibly recursive iteration on window children done
1996 // by Validate() and TransferData{To,From}Window() and allows to avoid code
1997 // duplication in all three functions.
1998 class ValidationTraverserBase
1999 {
2000 public:
2001     wxEXPLICIT ValidationTraverserBase(wxWindowBase* win)
2002         : m_win(static_cast<wxWindow*>(win))
2003     {
2004     }
2005
2006     // Traverse all the direct children calling OnDo() on them and also all
2007     // grandchildren if wxWS_EX_VALIDATE_RECURSIVELY is used, calling
2008     // OnRecurse() for them.
2009     bool DoForAllChildren()
2010     {
2011         const bool recurse = m_win->HasExtraStyle(wxWS_EX_VALIDATE_RECURSIVELY);
2012
2013         wxWindowList& children = m_win->GetChildren();
2014         for ( wxWindowList::iterator i = children.begin();
2015               i != children.end();
2016               ++i )
2017         {
2018             wxWindow* const child = static_cast<wxWindow*>(*i);
2019             wxValidator* const validator = child->GetValidator();
2020             if ( validator && !OnDo(validator) )
2021             {
2022                 return false;
2023             }
2024
2025             // Notice that validation should never recurse into top level
2026             // children, e.g. some other dialog which might happen to be
2027             // currently shown.
2028             if ( recurse && !child->IsTopLevel() && !OnRecurse(child) )
2029             {
2030                 return false;
2031             }
2032         }
2033
2034         return true;
2035     }
2036
2037     // Give it a virtual dtor just to suppress gcc warnings about a class with
2038     // virtual methods but non-virtual dtor -- even if this is completely safe
2039     // here as we never use the objects of this class polymorphically.
2040     virtual ~ValidationTraverserBase() { }
2041
2042 protected:
2043     // Called for each child, validator is guaranteed to be non-NULL.
2044     virtual bool OnDo(wxValidator* validator) = 0;
2045
2046     // Called for each child if we need to recurse into its children.
2047     virtual bool OnRecurse(wxWindow* child) = 0;
2048
2049
2050     // The window whose children we're traversing.
2051     wxWindow* const m_win;
2052
2053     wxDECLARE_NO_COPY_CLASS(ValidationTraverserBase);
2054 };
2055
2056 } // anonymous namespace
2057
2058 #endif // wxUSE_VALIDATORS
2059
2060 bool wxWindowBase::Validate()
2061 {
2062 #if wxUSE_VALIDATORS
2063     class ValidateTraverser : public ValidationTraverserBase
2064     {
2065     public:
2066         wxEXPLICIT ValidateTraverser(wxWindowBase* win)
2067             : ValidationTraverserBase(win)
2068         {
2069         }
2070
2071         virtual bool OnDo(wxValidator* validator)
2072         {
2073             return validator->Validate(m_win);
2074         }
2075
2076         virtual bool OnRecurse(wxWindow* child)
2077         {
2078             return child->Validate();
2079         }
2080     };
2081
2082     return ValidateTraverser(this).DoForAllChildren();
2083 #else // !wxUSE_VALIDATORS
2084     return true;
2085 #endif // wxUSE_VALIDATORS/!wxUSE_VALIDATORS
2086 }
2087
2088 bool wxWindowBase::TransferDataToWindow()
2089 {
2090 #if wxUSE_VALIDATORS
2091     class DataToWindowTraverser : public ValidationTraverserBase
2092     {
2093     public:
2094         wxEXPLICIT DataToWindowTraverser(wxWindowBase* win)
2095             : ValidationTraverserBase(win)
2096         {
2097         }
2098
2099         virtual bool OnDo(wxValidator* validator)
2100         {
2101             if ( !validator->TransferToWindow() )
2102             {
2103                 wxLogWarning(_("Could not transfer data to window"));
2104 #if wxUSE_LOG
2105                 wxLog::FlushActive();
2106 #endif // wxUSE_LOG
2107
2108                 return false;
2109             }
2110
2111             return true;
2112         }
2113
2114         virtual bool OnRecurse(wxWindow* child)
2115         {
2116             return child->TransferDataToWindow();
2117         }
2118     };
2119
2120     return DataToWindowTraverser(this).DoForAllChildren();
2121 #else // !wxUSE_VALIDATORS
2122     return true;
2123 #endif // wxUSE_VALIDATORS/!wxUSE_VALIDATORS
2124 }
2125
2126 bool wxWindowBase::TransferDataFromWindow()
2127 {
2128 #if wxUSE_VALIDATORS
2129     class DataFromWindowTraverser : public ValidationTraverserBase
2130     {
2131     public:
2132         DataFromWindowTraverser(wxWindowBase* win)
2133             : ValidationTraverserBase(win)
2134         {
2135         }
2136
2137         virtual bool OnDo(wxValidator* validator)
2138         {
2139             return validator->TransferFromWindow();
2140         }
2141
2142         virtual bool OnRecurse(wxWindow* child)
2143         {
2144             return child->TransferDataFromWindow();
2145         }
2146     };
2147
2148     return DataFromWindowTraverser(this).DoForAllChildren();
2149 #else // !wxUSE_VALIDATORS
2150     return true;
2151 #endif // wxUSE_VALIDATORS/!wxUSE_VALIDATORS
2152 }
2153
2154 void wxWindowBase::InitDialog()
2155 {
2156     wxInitDialogEvent event(GetId());
2157     event.SetEventObject( this );
2158     GetEventHandler()->ProcessEvent(event);
2159 }
2160
2161 // ----------------------------------------------------------------------------
2162 // context-sensitive help support
2163 // ----------------------------------------------------------------------------
2164
2165 #if wxUSE_HELP
2166
2167 // associate this help text with this window
2168 void wxWindowBase::SetHelpText(const wxString& text)
2169 {
2170     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2171     if ( helpProvider )
2172     {
2173         helpProvider->AddHelp(this, text);
2174     }
2175 }
2176
2177 #if WXWIN_COMPATIBILITY_2_8
2178 // associate this help text with all windows with the same id as this
2179 // one
2180 void wxWindowBase::SetHelpTextForId(const wxString& text)
2181 {
2182     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2183     if ( helpProvider )
2184     {
2185         helpProvider->AddHelp(GetId(), text);
2186     }
2187 }
2188 #endif // WXWIN_COMPATIBILITY_2_8
2189
2190 // get the help string associated with this window (may be empty)
2191 // default implementation forwards calls to the help provider
2192 wxString
2193 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
2194                                  wxHelpEvent::Origin WXUNUSED(origin)) const
2195 {
2196     wxString text;
2197     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2198     if ( helpProvider )
2199     {
2200         text = helpProvider->GetHelp(this);
2201     }
2202
2203     return text;
2204 }
2205
2206 // show help for this window
2207 void wxWindowBase::OnHelp(wxHelpEvent& event)
2208 {
2209     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2210     if ( helpProvider )
2211     {
2212         wxPoint pos = event.GetPosition();
2213         const wxHelpEvent::Origin origin = event.GetOrigin();
2214         if ( origin == wxHelpEvent::Origin_Keyboard )
2215         {
2216             // if the help event was generated from keyboard it shouldn't
2217             // appear at the mouse position (which is still the only position
2218             // associated with help event) if the mouse is far away, although
2219             // we still do use the mouse position if it's over the window
2220             // because we suppose the user looks approximately at the mouse
2221             // already and so it would be more convenient than showing tooltip
2222             // at some arbitrary position which can be quite far from it
2223             const wxRect rectClient = GetClientRect();
2224             if ( !rectClient.Contains(ScreenToClient(pos)) )
2225             {
2226                 // position help slightly under and to the right of this window
2227                 pos = ClientToScreen(wxPoint(
2228                         2*GetCharWidth(),
2229                         rectClient.height + GetCharHeight()
2230                       ));
2231             }
2232         }
2233
2234         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
2235         {
2236             // skip the event.Skip() below
2237             return;
2238         }
2239     }
2240
2241     event.Skip();
2242 }
2243
2244 #endif // wxUSE_HELP
2245
2246 // ----------------------------------------------------------------------------
2247 // tooltips
2248 // ----------------------------------------------------------------------------
2249
2250 #if wxUSE_TOOLTIPS
2251
2252 wxString wxWindowBase::GetToolTipText() const
2253 {
2254     return m_tooltip ? m_tooltip->GetTip() : wxString();
2255 }
2256
2257 void wxWindowBase::SetToolTip( const wxString &tip )
2258 {
2259     // don't create the new tooltip if we already have one
2260     if ( m_tooltip )
2261     {
2262         m_tooltip->SetTip( tip );
2263     }
2264     else
2265     {
2266         SetToolTip( new wxToolTip( tip ) );
2267     }
2268
2269     // setting empty tooltip text does not remove the tooltip any more - use
2270     // SetToolTip(NULL) for this
2271 }
2272
2273 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
2274 {
2275     if ( m_tooltip != tooltip )
2276     {
2277         if ( m_tooltip )
2278             delete m_tooltip;
2279
2280         m_tooltip = tooltip;
2281     }
2282 }
2283
2284 bool wxWindowBase::CopyToolTip(wxToolTip *tip)
2285 {
2286     SetToolTip(tip ? new wxToolTip(tip->GetTip()) : NULL);
2287
2288     return tip != NULL;
2289 }
2290
2291 #endif // wxUSE_TOOLTIPS
2292
2293 // ----------------------------------------------------------------------------
2294 // constraints and sizers
2295 // ----------------------------------------------------------------------------
2296
2297 #if wxUSE_CONSTRAINTS
2298
2299 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
2300 {
2301     if ( m_constraints )
2302     {
2303         UnsetConstraints(m_constraints);
2304         delete m_constraints;
2305     }
2306     m_constraints = constraints;
2307     if ( m_constraints )
2308     {
2309         // Make sure other windows know they're part of a 'meaningful relationship'
2310         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
2311             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
2312         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
2313             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
2314         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
2315             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
2316         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
2317             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
2318         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
2319             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
2320         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
2321             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
2322         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
2323             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
2324         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
2325             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
2326     }
2327 }
2328
2329 // This removes any dangling pointers to this window in other windows'
2330 // constraintsInvolvedIn lists.
2331 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
2332 {
2333     if ( c )
2334     {
2335         if ( c->left.GetOtherWindow() && (c->left.GetOtherWindow() != this) )
2336             c->left.GetOtherWindow()->RemoveConstraintReference(this);
2337         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2338             c->top.GetOtherWindow()->RemoveConstraintReference(this);
2339         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
2340             c->right.GetOtherWindow()->RemoveConstraintReference(this);
2341         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
2342             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
2343         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
2344             c->width.GetOtherWindow()->RemoveConstraintReference(this);
2345         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
2346             c->height.GetOtherWindow()->RemoveConstraintReference(this);
2347         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
2348             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
2349         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
2350             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
2351     }
2352 }
2353
2354 // Back-pointer to other windows we're involved with, so if we delete this
2355 // window, we must delete any constraints we're involved with.
2356 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
2357 {
2358     if ( !m_constraintsInvolvedIn )
2359         m_constraintsInvolvedIn = new wxWindowList;
2360     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
2361         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
2362 }
2363
2364 // REMOVE back-pointer to other windows we're involved with.
2365 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
2366 {
2367     if ( m_constraintsInvolvedIn )
2368         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
2369 }
2370
2371 // Reset any constraints that mention this window
2372 void wxWindowBase::DeleteRelatedConstraints()
2373 {
2374     if ( m_constraintsInvolvedIn )
2375     {
2376         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
2377         while (node)
2378         {
2379             wxWindow *win = node->GetData();
2380             wxLayoutConstraints *constr = win->GetConstraints();
2381
2382             // Reset any constraints involving this window
2383             if ( constr )
2384             {
2385                 constr->left.ResetIfWin(this);
2386                 constr->top.ResetIfWin(this);
2387                 constr->right.ResetIfWin(this);
2388                 constr->bottom.ResetIfWin(this);
2389                 constr->width.ResetIfWin(this);
2390                 constr->height.ResetIfWin(this);
2391                 constr->centreX.ResetIfWin(this);
2392                 constr->centreY.ResetIfWin(this);
2393             }
2394
2395             wxWindowList::compatibility_iterator next = node->GetNext();
2396             m_constraintsInvolvedIn->Erase(node);
2397             node = next;
2398         }
2399
2400         wxDELETE(m_constraintsInvolvedIn);
2401     }
2402 }
2403
2404 #endif // wxUSE_CONSTRAINTS
2405
2406 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2407 {
2408     if ( sizer == m_windowSizer)
2409         return;
2410
2411     if ( m_windowSizer )
2412     {
2413         m_windowSizer->SetContainingWindow(NULL);
2414
2415         if ( deleteOld )
2416             delete m_windowSizer;
2417     }
2418
2419     m_windowSizer = sizer;
2420     if ( m_windowSizer )
2421     {
2422         m_windowSizer->SetContainingWindow((wxWindow *)this);
2423     }
2424
2425     SetAutoLayout(m_windowSizer != NULL);
2426 }
2427
2428 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2429 {
2430     SetSizer( sizer, deleteOld );
2431     sizer->SetSizeHints( (wxWindow*) this );
2432 }
2433
2434
2435 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2436 {
2437     // adding a window to a sizer twice is going to result in fatal and
2438     // hard to debug problems later because when deleting the second
2439     // associated wxSizerItem we're going to dereference a dangling
2440     // pointer; so try to detect this as early as possible
2441     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2442                   wxT("Adding a window to the same sizer twice?") );
2443
2444     m_containingSizer = sizer;
2445 }
2446
2447 #if wxUSE_CONSTRAINTS
2448
2449 void wxWindowBase::SatisfyConstraints()
2450 {
2451     wxLayoutConstraints *constr = GetConstraints();
2452     bool wasOk = constr && constr->AreSatisfied();
2453
2454     ResetConstraints();   // Mark all constraints as unevaluated
2455
2456     int noChanges = 1;
2457
2458     // if we're a top level panel (i.e. our parent is frame/dialog), our
2459     // own constraints will never be satisfied any more unless we do it
2460     // here
2461     if ( wasOk )
2462     {
2463         while ( noChanges > 0 )
2464         {
2465             LayoutPhase1(&noChanges);
2466         }
2467     }
2468
2469     LayoutPhase2(&noChanges);
2470 }
2471
2472 #endif // wxUSE_CONSTRAINTS
2473
2474 bool wxWindowBase::Layout()
2475 {
2476     // If there is a sizer, use it instead of the constraints
2477     if ( GetSizer() )
2478     {
2479         int w = 0, h = 0;
2480         GetVirtualSize(&w, &h);
2481         GetSizer()->SetDimension( 0, 0, w, h );
2482     }
2483 #if wxUSE_CONSTRAINTS
2484     else
2485     {
2486         SatisfyConstraints(); // Find the right constraints values
2487         SetConstraintSizes(); // Recursively set the real window sizes
2488     }
2489 #endif
2490
2491     return true;
2492 }
2493
2494 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2495 {
2496     if ( GetAutoLayout() )
2497         Layout();
2498
2499     event.Skip();
2500 }
2501
2502 #if wxUSE_CONSTRAINTS
2503
2504 // first phase of the constraints evaluation: set our own constraints
2505 bool wxWindowBase::LayoutPhase1(int *noChanges)
2506 {
2507     wxLayoutConstraints *constr = GetConstraints();
2508
2509     return !constr || constr->SatisfyConstraints(this, noChanges);
2510 }
2511
2512 // second phase: set the constraints for our children
2513 bool wxWindowBase::LayoutPhase2(int *noChanges)
2514 {
2515     *noChanges = 0;
2516
2517     // Layout children
2518     DoPhase(1);
2519
2520     // Layout grand children
2521     DoPhase(2);
2522
2523     return true;
2524 }
2525
2526 // Do a phase of evaluating child constraints
2527 bool wxWindowBase::DoPhase(int phase)
2528 {
2529     // the list containing the children for which the constraints are already
2530     // set correctly
2531     wxWindowList succeeded;
2532
2533     // the max number of iterations we loop before concluding that we can't set
2534     // the constraints
2535     static const int maxIterations = 500;
2536
2537     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2538     {
2539         int noChanges = 0;
2540
2541         // loop over all children setting their constraints
2542         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2543               node;
2544               node = node->GetNext() )
2545         {
2546             wxWindow *child = node->GetData();
2547             if ( child->IsTopLevel() )
2548             {
2549                 // top level children are not inside our client area
2550                 continue;
2551             }
2552
2553             if ( !child->GetConstraints() || succeeded.Find(child) )
2554             {
2555                 // this one is either already ok or nothing we can do about it
2556                 continue;
2557             }
2558
2559             int tempNoChanges = 0;
2560             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2561                                       : child->LayoutPhase2(&tempNoChanges);
2562             noChanges += tempNoChanges;
2563
2564             if ( success )
2565             {
2566                 succeeded.Append(child);
2567             }
2568         }
2569
2570         if ( !noChanges )
2571         {
2572             // constraints are set
2573             break;
2574         }
2575     }
2576
2577     return true;
2578 }
2579
2580 void wxWindowBase::ResetConstraints()
2581 {
2582     wxLayoutConstraints *constr = GetConstraints();
2583     if ( constr )
2584     {
2585         constr->left.SetDone(false);
2586         constr->top.SetDone(false);
2587         constr->right.SetDone(false);
2588         constr->bottom.SetDone(false);
2589         constr->width.SetDone(false);
2590         constr->height.SetDone(false);
2591         constr->centreX.SetDone(false);
2592         constr->centreY.SetDone(false);
2593     }
2594
2595     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2596     while (node)
2597     {
2598         wxWindow *win = node->GetData();
2599         if ( !win->IsTopLevel() )
2600             win->ResetConstraints();
2601         node = node->GetNext();
2602     }
2603 }
2604
2605 // Need to distinguish between setting the 'fake' size for windows and sizers,
2606 // and setting the real values.
2607 void wxWindowBase::SetConstraintSizes(bool recurse)
2608 {
2609     wxLayoutConstraints *constr = GetConstraints();
2610     if ( constr && constr->AreSatisfied() )
2611     {
2612         ChildrenRepositioningGuard repositionGuard(this);
2613
2614         int x = constr->left.GetValue();
2615         int y = constr->top.GetValue();
2616         int w = constr->width.GetValue();
2617         int h = constr->height.GetValue();
2618
2619         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2620              (constr->height.GetRelationship() != wxAsIs) )
2621         {
2622             // We really shouldn't set negative sizes for the windows so make
2623             // them at least of 1*1 size
2624             SetSize(x, y, w > 0 ? w : 1, h > 0 ? h : 1);
2625         }
2626         else
2627         {
2628             // If we don't want to resize this window, just move it...
2629             Move(x, y);
2630         }
2631     }
2632     else if ( constr )
2633     {
2634         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2635                    GetClassInfo()->GetClassName(),
2636                    GetName().c_str());
2637     }
2638
2639     if ( recurse )
2640     {
2641         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2642         while (node)
2643         {
2644             wxWindow *win = node->GetData();
2645             if ( !win->IsTopLevel() && win->GetConstraints() )
2646                 win->SetConstraintSizes();
2647             node = node->GetNext();
2648         }
2649     }
2650 }
2651
2652 // Only set the size/position of the constraint (if any)
2653 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2654 {
2655     wxLayoutConstraints *constr = GetConstraints();
2656     if ( constr )
2657     {
2658         if ( x != wxDefaultCoord )
2659         {
2660             constr->left.SetValue(x);
2661             constr->left.SetDone(true);
2662         }
2663         if ( y != wxDefaultCoord )
2664         {
2665             constr->top.SetValue(y);
2666             constr->top.SetDone(true);
2667         }
2668         if ( w != wxDefaultCoord )
2669         {
2670             constr->width.SetValue(w);
2671             constr->width.SetDone(true);
2672         }
2673         if ( h != wxDefaultCoord )
2674         {
2675             constr->height.SetValue(h);
2676             constr->height.SetDone(true);
2677         }
2678     }
2679 }
2680
2681 void wxWindowBase::MoveConstraint(int x, int y)
2682 {
2683     wxLayoutConstraints *constr = GetConstraints();
2684     if ( constr )
2685     {
2686         if ( x != wxDefaultCoord )
2687         {
2688             constr->left.SetValue(x);
2689             constr->left.SetDone(true);
2690         }
2691         if ( y != wxDefaultCoord )
2692         {
2693             constr->top.SetValue(y);
2694             constr->top.SetDone(true);
2695         }
2696     }
2697 }
2698
2699 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2700 {
2701     wxLayoutConstraints *constr = GetConstraints();
2702     if ( constr )
2703     {
2704         *w = constr->width.GetValue();
2705         *h = constr->height.GetValue();
2706     }
2707     else
2708         GetSize(w, h);
2709 }
2710
2711 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2712 {
2713     wxLayoutConstraints *constr = GetConstraints();
2714     if ( constr )
2715     {
2716         *w = constr->width.GetValue();
2717         *h = constr->height.GetValue();
2718     }
2719     else
2720         GetClientSize(w, h);
2721 }
2722
2723 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2724 {
2725     wxLayoutConstraints *constr = GetConstraints();
2726     if ( constr )
2727     {
2728         *x = constr->left.GetValue();
2729         *y = constr->top.GetValue();
2730     }
2731     else
2732         GetPosition(x, y);
2733 }
2734
2735 #endif // wxUSE_CONSTRAINTS
2736
2737 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2738 {
2739     wxWindow *parent = GetParent();
2740     if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2741     {
2742         wxPoint pt(parent->GetClientAreaOrigin());
2743         x += pt.x;
2744         y += pt.y;
2745     }
2746 }
2747
2748 // ----------------------------------------------------------------------------
2749 // Update UI processing
2750 // ----------------------------------------------------------------------------
2751
2752 void wxWindowBase::UpdateWindowUI(long flags)
2753 {
2754     wxUpdateUIEvent event(GetId());
2755     event.SetEventObject(this);
2756
2757     if ( GetEventHandler()->ProcessEvent(event) )
2758     {
2759         DoUpdateWindowUI(event);
2760     }
2761
2762     if (flags & wxUPDATE_UI_RECURSE)
2763     {
2764         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2765         while (node)
2766         {
2767             wxWindow* child = (wxWindow*) node->GetData();
2768             child->UpdateWindowUI(flags);
2769             node = node->GetNext();
2770         }
2771     }
2772 }
2773
2774 // do the window-specific processing after processing the update event
2775 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2776 {
2777     if ( event.GetSetEnabled() )
2778         Enable(event.GetEnabled());
2779
2780     if ( event.GetSetShown() )
2781         Show(event.GetShown());
2782 }
2783
2784 // ----------------------------------------------------------------------------
2785 // Idle processing
2786 // ----------------------------------------------------------------------------
2787
2788 // Send idle event to window and all subwindows
2789 bool wxWindowBase::SendIdleEvents(wxIdleEvent& event)
2790 {
2791     bool needMore = false;
2792
2793     OnInternalIdle();
2794
2795     // should we send idle event to this window?
2796     if (wxIdleEvent::GetMode() == wxIDLE_PROCESS_ALL ||
2797         HasExtraStyle(wxWS_EX_PROCESS_IDLE))
2798     {
2799         event.SetEventObject(this);
2800         HandleWindowEvent(event);
2801
2802         if (event.MoreRequested())
2803             needMore = true;
2804     }
2805     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2806     for (; node; node = node->GetNext())
2807     {
2808         wxWindow* child = node->GetData();
2809         if (child->SendIdleEvents(event))
2810             needMore = true;
2811     }
2812
2813     return needMore;
2814 }
2815
2816 void wxWindowBase::OnInternalIdle()
2817 {
2818     if ( wxUpdateUIEvent::CanUpdate(this) )
2819         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
2820 }
2821
2822 // ----------------------------------------------------------------------------
2823 // dialog units translations
2824 // ----------------------------------------------------------------------------
2825
2826 // Windows' computes dialog units using average character width over upper-
2827 // and lower-case ASCII alphabet and not using the average character width
2828 // metadata stored in the font; see
2829 // http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion.
2830 // It's important that we perform the conversion in identical way, because
2831 // dialog units natively exist only on Windows and Windows HIG is expressed
2832 // using them.
2833 wxSize wxWindowBase::GetDlgUnitBase() const
2834 {
2835     const wxWindowBase * const parent = wxGetTopLevelParent((wxWindow*)this);
2836
2837     wxCHECK_MSG( parent, wxDefaultSize, wxS("Must have TLW parent") );
2838
2839     if ( !parent->m_font.IsOk() )
2840     {
2841         // Default GUI font is used. This is the most common case, so
2842         // cache the results.
2843         static wxSize s_defFontSize;
2844         if ( s_defFontSize.x == 0 )
2845             s_defFontSize = wxPrivate::GetAverageASCIILetterSize(*parent);
2846         return s_defFontSize;
2847     }
2848     else
2849     {
2850         // Custom font, we always need to compute the result
2851         return wxPrivate::GetAverageASCIILetterSize(*parent);
2852     }
2853 }
2854
2855 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt) const
2856 {
2857     const wxSize base = GetDlgUnitBase();
2858
2859     // NB: wxMulDivInt32() is used, because it correctly rounds the result
2860
2861     wxPoint pt2 = wxDefaultPosition;
2862     if (pt.x != wxDefaultCoord)
2863         pt2.x = wxMulDivInt32(pt.x, 4, base.x);
2864     if (pt.y != wxDefaultCoord)
2865         pt2.y = wxMulDivInt32(pt.y, 8, base.y);
2866
2867     return pt2;
2868 }
2869
2870 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt) const
2871 {
2872     const wxSize base = GetDlgUnitBase();
2873
2874     wxPoint pt2 = wxDefaultPosition;
2875     if (pt.x != wxDefaultCoord)
2876         pt2.x = wxMulDivInt32(pt.x, base.x, 4);
2877     if (pt.y != wxDefaultCoord)
2878         pt2.y = wxMulDivInt32(pt.y, base.y, 8);
2879
2880     return pt2;
2881 }
2882
2883 // ----------------------------------------------------------------------------
2884 // event handlers
2885 // ----------------------------------------------------------------------------
2886
2887 // propagate the colour change event to the subwindows
2888 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
2889 {
2890     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2891     while ( node )
2892     {
2893         // Only propagate to non-top-level windows
2894         wxWindow *win = node->GetData();
2895         if ( !win->IsTopLevel() )
2896         {
2897             wxSysColourChangedEvent event2;
2898             event2.SetEventObject(win);
2899             win->GetEventHandler()->ProcessEvent(event2);
2900         }
2901
2902         node = node->GetNext();
2903     }
2904
2905     Refresh();
2906 }
2907
2908 // the default action is to populate dialog with data when it's created,
2909 // and nudge the UI into displaying itself correctly in case
2910 // we've turned the wxUpdateUIEvents frequency down low.
2911 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2912 {
2913     TransferDataToWindow();
2914
2915     // Update the UI at this point
2916     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2917 }
2918
2919 // ----------------------------------------------------------------------------
2920 // menu-related functions
2921 // ----------------------------------------------------------------------------
2922
2923 #if wxUSE_MENUS
2924
2925 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2926 {
2927     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2928
2929     wxMenuInvokingWindowSetter
2930         setInvokingWin(*menu, static_cast<wxWindow *>(this));
2931
2932     wxCurrentPopupMenu = menu;
2933     const bool rc = DoPopupMenu(menu, x, y);
2934     wxCurrentPopupMenu = NULL;
2935
2936     return rc;
2937 }
2938
2939 // this is used to pass the id of the selected item from the menu event handler
2940 // to the main function itself
2941 //
2942 // it's ok to use a global here as there can be at most one popup menu shown at
2943 // any time
2944 static int gs_popupMenuSelection = wxID_NONE;
2945
2946 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2947 {
2948     // store the id in a global variable where we'll retrieve it from later
2949     gs_popupMenuSelection = event.GetId();
2950 }
2951
2952 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2953 {
2954     // nothing to do but do not skip it
2955 }
2956
2957 int
2958 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2959 {
2960     gs_popupMenuSelection = wxID_NONE;
2961
2962     Connect(wxEVT_MENU,
2963             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2964             NULL,
2965             this);
2966
2967     // it is common to construct the menu passed to this function dynamically
2968     // using some fixed range of ids which could clash with the ids used
2969     // elsewhere in the program, which could result in some menu items being
2970     // unintentionally disabled or otherwise modified by update UI handlers
2971     // elsewhere in the program code and this is difficult to avoid in the
2972     // program itself, so instead we just temporarily suspend UI updating while
2973     // this menu is shown
2974     Connect(wxEVT_UPDATE_UI,
2975             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2976             NULL,
2977             this);
2978
2979     PopupMenu(&menu, x, y);
2980
2981     Disconnect(wxEVT_UPDATE_UI,
2982                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2983                NULL,
2984                this);
2985     Disconnect(wxEVT_MENU,
2986                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2987                NULL,
2988                this);
2989
2990     return gs_popupMenuSelection;
2991 }
2992
2993 #endif // wxUSE_MENUS
2994
2995 // methods for drawing the sizers in a visible way: this is currently only
2996 // enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
2997 // that well and also because we don't want to leave it enabled in default
2998 // builds used for production
2999 #if wxDEBUG_LEVEL > 1
3000
3001 static void DrawSizers(wxWindowBase *win);
3002
3003 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
3004 {
3005     wxClientDC dc((wxWindow *)win);
3006     dc.SetPen(*pen);
3007     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
3008                        *wxTRANSPARENT_BRUSH);
3009     dc.DrawRectangle(rect.Deflate(1, 1));
3010 }
3011
3012 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
3013 {
3014     const wxSizerItemList& items = sizer->GetChildren();
3015     for ( wxSizerItemList::const_iterator i = items.begin(),
3016                                         end = items.end();
3017           i != end;
3018           ++i )
3019     {
3020         wxSizerItem *item = *i;
3021         if ( item->IsSizer() )
3022         {
3023             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
3024             DrawSizer(win, item->GetSizer());
3025         }
3026         else if ( item->IsSpacer() )
3027         {
3028             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
3029         }
3030         else if ( item->IsWindow() )
3031         {
3032             DrawSizers(item->GetWindow());
3033         }
3034         else
3035             wxFAIL_MSG("inconsistent wxSizerItem status!");
3036     }
3037 }
3038
3039 static void DrawSizers(wxWindowBase *win)
3040 {
3041     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
3042
3043     wxSizer *sizer = win->GetSizer();
3044     if ( sizer )
3045     {
3046         DrawSizer(win, sizer);
3047     }
3048     else // no sizer, still recurse into the children
3049     {
3050         const wxWindowList& children = win->GetChildren();
3051         for ( wxWindowList::const_iterator i = children.begin(),
3052                                          end = children.end();
3053               i != end;
3054               ++i )
3055         {
3056             DrawSizers(*i);
3057         }
3058
3059         // show all kind of sizes of this window; see the "window sizing" topic
3060         // overview for more info about the various differences:
3061         wxSize fullSz = win->GetSize();
3062         wxSize clientSz = win->GetClientSize();
3063         wxSize bestSz = win->GetBestSize();
3064         wxSize minSz = win->GetMinSize();
3065         wxSize maxSz = win->GetMaxSize();
3066         wxSize virtualSz = win->GetVirtualSize();
3067
3068         wxMessageOutputDebug dbgout;
3069         dbgout.Printf(
3070             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
3071             win->GetName(),
3072             fullSz.x, fullSz.y,
3073             clientSz.x, clientSz.y,
3074             bestSz.x, bestSz.y,
3075             minSz.x, minSz.y,
3076             maxSz.x, maxSz.y,
3077             virtualSz.x, virtualSz.y);
3078     }
3079 }
3080
3081 #endif // wxDEBUG_LEVEL
3082
3083 // process special middle clicks
3084 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
3085 {
3086     if ( event.ControlDown() && event.AltDown() )
3087     {
3088 #if wxDEBUG_LEVEL > 1
3089         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
3090         if ( event.ShiftDown() )
3091         {
3092             DrawSizers(this);
3093         }
3094         else
3095 #endif // __WXDEBUG__
3096         {
3097 #if wxUSE_MSGDLG
3098             // just Ctrl-Alt-middle click shows information about wx version
3099             ::wxInfoMessageBox((wxWindow*)this);
3100 #endif // wxUSE_MSGDLG
3101         }
3102     }
3103     else
3104     {
3105         event.Skip();
3106     }
3107 }
3108
3109 // ----------------------------------------------------------------------------
3110 // accessibility
3111 // ----------------------------------------------------------------------------
3112
3113 #if wxUSE_ACCESSIBILITY
3114 void wxWindowBase::SetAccessible(wxAccessible* accessible)
3115 {
3116     if (m_accessible && (accessible != m_accessible))
3117         delete m_accessible;
3118     m_accessible = accessible;
3119     if (m_accessible)
3120         m_accessible->SetWindow((wxWindow*) this);
3121 }
3122
3123 // Returns the accessible object, creating if necessary.
3124 wxAccessible* wxWindowBase::GetOrCreateAccessible()
3125 {
3126     if (!m_accessible)
3127         m_accessible = CreateAccessible();
3128     return m_accessible;
3129 }
3130
3131 // Override to create a specific accessible object.
3132 wxAccessible* wxWindowBase::CreateAccessible()
3133 {
3134     return new wxWindowAccessible((wxWindow*) this);
3135 }
3136
3137 #endif
3138
3139 // ----------------------------------------------------------------------------
3140 // list classes implementation
3141 // ----------------------------------------------------------------------------
3142
3143 #if wxUSE_STD_CONTAINERS
3144
3145 #include "wx/listimpl.cpp"
3146 WX_DEFINE_LIST(wxWindowList)
3147
3148 #else // !wxUSE_STD_CONTAINERS
3149
3150 void wxWindowListNode::DeleteData()
3151 {
3152     delete (wxWindow *)GetData();
3153 }
3154
3155 #endif // wxUSE_STD_CONTAINERS/!wxUSE_STD_CONTAINERS
3156
3157 // ----------------------------------------------------------------------------
3158 // borders
3159 // ----------------------------------------------------------------------------
3160
3161 wxBorder wxWindowBase::GetBorder(long flags) const
3162 {
3163     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
3164     if ( border == wxBORDER_DEFAULT )
3165     {
3166         border = GetDefaultBorder();
3167     }
3168     else if ( border == wxBORDER_THEME )
3169     {
3170         border = GetDefaultBorderForControl();
3171     }
3172
3173     return border;
3174 }
3175
3176 wxBorder wxWindowBase::GetDefaultBorder() const
3177 {
3178     return wxBORDER_NONE;
3179 }
3180
3181 // ----------------------------------------------------------------------------
3182 // hit testing
3183 // ----------------------------------------------------------------------------
3184
3185 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
3186 {
3187     // here we just check if the point is inside the window or not
3188
3189     // check the top and left border first
3190     bool outside = x < 0 || y < 0;
3191     if ( !outside )
3192     {
3193         // check the right and bottom borders too
3194         wxSize size = GetSize();
3195         outside = x >= size.x || y >= size.y;
3196     }
3197
3198     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
3199 }
3200
3201 // ----------------------------------------------------------------------------
3202 // mouse capture
3203 // ----------------------------------------------------------------------------
3204
3205 struct WXDLLEXPORT wxWindowNext
3206 {
3207     wxWindow *win;
3208     wxWindowNext *next;
3209 } *wxWindowBase::ms_winCaptureNext = NULL;
3210 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
3211 bool wxWindowBase::ms_winCaptureChanging = false;
3212
3213 void wxWindowBase::CaptureMouse()
3214 {
3215     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
3216
3217     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
3218
3219     ms_winCaptureChanging = true;
3220
3221     wxWindow *winOld = GetCapture();
3222     if ( winOld )
3223     {
3224         ((wxWindowBase*) winOld)->DoReleaseMouse();
3225
3226         // save it on stack
3227         wxWindowNext *item = new wxWindowNext;
3228         item->win = winOld;
3229         item->next = ms_winCaptureNext;
3230         ms_winCaptureNext = item;
3231     }
3232     //else: no mouse capture to save
3233
3234     DoCaptureMouse();
3235     ms_winCaptureCurrent = (wxWindow*)this;
3236
3237     ms_winCaptureChanging = false;
3238 }
3239
3240 void wxWindowBase::ReleaseMouse()
3241 {
3242     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
3243
3244     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
3245
3246     wxASSERT_MSG( GetCapture() == this,
3247                   "attempt to release mouse, but this window hasn't captured it" );
3248     wxASSERT_MSG( ms_winCaptureCurrent == this,
3249                   "attempt to release mouse, but this window hasn't captured it" );
3250
3251     ms_winCaptureChanging = true;
3252
3253     DoReleaseMouse();
3254     ms_winCaptureCurrent = NULL;
3255
3256     if ( ms_winCaptureNext )
3257     {
3258         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
3259         ms_winCaptureCurrent = ms_winCaptureNext->win;
3260
3261         wxWindowNext *item = ms_winCaptureNext;
3262         ms_winCaptureNext = item->next;
3263         delete item;
3264     }
3265     //else: stack is empty, no previous capture
3266
3267     ms_winCaptureChanging = false;
3268
3269     wxLogTrace(wxT("mousecapture"),
3270         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
3271         static_cast<void*>(GetCapture()));
3272 }
3273
3274 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
3275 {
3276     wxMouseCaptureLostEvent event(win->GetId());
3277     event.SetEventObject(win);
3278     if ( !win->GetEventHandler()->ProcessEvent(event) )
3279     {
3280         // windows must handle this event, otherwise the app wouldn't behave
3281         // correctly if it loses capture unexpectedly; see the discussion here:
3282         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
3283         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
3284         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
3285     }
3286 }
3287
3288 /* static */
3289 void wxWindowBase::NotifyCaptureLost()
3290 {
3291     // don't do anything if capture lost was expected, i.e. resulted from
3292     // a wx call to ReleaseMouse or CaptureMouse:
3293     if ( ms_winCaptureChanging )
3294         return;
3295
3296     // if the capture was lost unexpectedly, notify every window that has
3297     // capture (on stack or current) about it and clear the stack:
3298
3299     if ( ms_winCaptureCurrent )
3300     {
3301         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
3302         ms_winCaptureCurrent = NULL;
3303     }
3304
3305     while ( ms_winCaptureNext )
3306     {
3307         wxWindowNext *item = ms_winCaptureNext;
3308         ms_winCaptureNext = item->next;
3309
3310         DoNotifyWindowAboutCaptureLost(item->win);
3311
3312         delete item;
3313     }
3314 }
3315
3316 #if wxUSE_HOTKEY
3317
3318 bool
3319 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
3320                              int WXUNUSED(modifiers),
3321                              int WXUNUSED(keycode))
3322 {
3323     // not implemented
3324     return false;
3325 }
3326
3327 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
3328 {
3329     // not implemented
3330     return false;
3331 }
3332
3333 #endif // wxUSE_HOTKEY
3334
3335 // ----------------------------------------------------------------------------
3336 // event processing
3337 // ----------------------------------------------------------------------------
3338
3339 bool wxWindowBase::TryBefore(wxEvent& event)
3340 {
3341 #if wxUSE_VALIDATORS
3342     // Can only use the validator of the window which
3343     // is receiving the event
3344     if ( event.GetEventObject() == this )
3345     {
3346         wxValidator * const validator = GetValidator();
3347         if ( validator && validator->ProcessEventLocally(event) )
3348         {
3349             return true;
3350         }
3351     }
3352 #endif // wxUSE_VALIDATORS
3353
3354     return wxEvtHandler::TryBefore(event);
3355 }
3356
3357 bool wxWindowBase::TryAfter(wxEvent& event)
3358 {
3359     // carry on up the parent-child hierarchy if the propagation count hasn't
3360     // reached zero yet
3361     if ( event.ShouldPropagate() )
3362     {
3363         // honour the requests to stop propagation at this window: this is
3364         // used by the dialogs, for example, to prevent processing the events
3365         // from the dialog controls in the parent frame which rarely, if ever,
3366         // makes sense
3367         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
3368         {
3369             wxWindow *parent = GetParent();
3370             if ( parent && !parent->IsBeingDeleted() )
3371             {
3372                 wxPropagateOnce propagateOnce(event, this);
3373
3374                 return parent->GetEventHandler()->ProcessEvent(event);
3375             }
3376         }
3377     }
3378
3379     return wxEvtHandler::TryAfter(event);
3380 }
3381
3382 // ----------------------------------------------------------------------------
3383 // window relationships
3384 // ----------------------------------------------------------------------------
3385
3386 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
3387 {
3388     wxCHECK_MSG( GetParent(), NULL,
3389                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
3390
3391     wxWindowList& siblings = GetParent()->GetChildren();
3392     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
3393     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
3394
3395     if ( order == OrderBefore )
3396         i = i->GetPrevious();
3397     else // OrderAfter
3398         i = i->GetNext();
3399
3400     return i ? i->GetData() : NULL;
3401 }
3402
3403 // ----------------------------------------------------------------------------
3404 // keyboard navigation
3405 // ----------------------------------------------------------------------------
3406
3407 // Navigates in the specified direction inside this window
3408 bool wxWindowBase::DoNavigateIn(int flags)
3409 {
3410 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
3411     // native code doesn't process our wxNavigationKeyEvents anyhow
3412     wxUnusedVar(flags);
3413     return false;
3414 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
3415     wxNavigationKeyEvent eventNav;
3416     wxWindow *focused = FindFocus();
3417     eventNav.SetCurrentFocus(focused);
3418     eventNav.SetEventObject(focused);
3419     eventNav.SetFlags(flags);
3420     return GetEventHandler()->ProcessEvent(eventNav);
3421 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
3422 }
3423
3424 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
3425 {
3426     if ( event.GetKeyCode() != WXK_TAB )
3427         return false;
3428
3429     int flags = wxNavigationKeyEvent::FromTab;
3430
3431     if ( event.ShiftDown() )
3432         flags |= wxNavigationKeyEvent::IsBackward;
3433     else
3434         flags |= wxNavigationKeyEvent::IsForward;
3435
3436     if ( event.ControlDown() )
3437         flags |= wxNavigationKeyEvent::WinChange;
3438
3439     Navigate(flags);
3440     return true;
3441 }
3442
3443 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
3444 {
3445     // check that we're not a top level window
3446     wxCHECK_RET( GetParent(),
3447                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
3448
3449     // detect the special case when we have nothing to do anyhow and when the
3450     // code below wouldn't work
3451     if ( win == this )
3452         return;
3453
3454     // find the target window in the siblings list
3455     wxWindowList& siblings = GetParent()->GetChildren();
3456     wxWindowList::compatibility_iterator i = siblings.Find(win);
3457     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3458
3459     // unfortunately, when wxUSE_STD_CONTAINERS == 1 DetachNode() is not
3460     // implemented so we can't just move the node around
3461     wxWindow *self = (wxWindow *)this;
3462     siblings.DeleteObject(self);
3463     if ( move == OrderAfter )
3464     {
3465         i = i->GetNext();
3466     }
3467
3468     if ( i )
3469     {
3470         siblings.Insert(i, self);
3471     }
3472     else // OrderAfter and win was the last sibling
3473     {
3474         siblings.Append(self);
3475     }
3476 }
3477
3478 // ----------------------------------------------------------------------------
3479 // focus handling
3480 // ----------------------------------------------------------------------------
3481
3482 /*static*/ wxWindow* wxWindowBase::FindFocus()
3483 {
3484     wxWindowBase *win = DoFindFocus();
3485     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3486 }
3487
3488 bool wxWindowBase::HasFocus() const
3489 {
3490     wxWindowBase* const win = DoFindFocus();
3491     return win &&
3492             (this == win || this == win->GetMainWindowOfCompositeControl());
3493 }
3494
3495 // ----------------------------------------------------------------------------
3496 // drag and drop
3497 // ----------------------------------------------------------------------------
3498
3499 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3500
3501 namespace
3502 {
3503
3504 class DragAcceptFilesTarget : public wxFileDropTarget
3505 {
3506 public:
3507     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3508
3509     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3510                              const wxArrayString& filenames)
3511     {
3512         wxDropFilesEvent event(wxEVT_DROP_FILES,
3513                                filenames.size(),
3514                                wxCArrayString(filenames).Release());
3515         event.SetEventObject(m_win);
3516         event.m_pos.x = x;
3517         event.m_pos.y = y;
3518
3519         return m_win->HandleWindowEvent(event);
3520     }
3521
3522 private:
3523     wxWindowBase * const m_win;
3524
3525     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3526 };
3527
3528
3529 } // anonymous namespace
3530
3531 // Generic version of DragAcceptFiles(). It works by installing a simple
3532 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3533 // together with explicit SetDropTarget() calls.
3534 void wxWindowBase::DragAcceptFiles(bool accept)
3535 {
3536     if ( accept )
3537     {
3538         wxASSERT_MSG( !GetDropTarget(),
3539                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3540         SetDropTarget(new DragAcceptFilesTarget(this));
3541     }
3542     else
3543     {
3544         SetDropTarget(NULL);
3545     }
3546 }
3547
3548 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3549
3550 // ----------------------------------------------------------------------------
3551 // global functions
3552 // ----------------------------------------------------------------------------
3553
3554 wxWindow* wxGetTopLevelParent(wxWindow *win)
3555 {
3556     while ( win && !win->IsTopLevel() )
3557          win = win->GetParent();
3558
3559     return win;
3560 }
3561
3562 #if wxUSE_ACCESSIBILITY
3563 // ----------------------------------------------------------------------------
3564 // accessible object for windows
3565 // ----------------------------------------------------------------------------
3566
3567 // Can return either a child object, or an integer
3568 // representing the child element, starting from 1.
3569 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3570 {
3571     wxASSERT( GetWindow() != NULL );
3572     if (!GetWindow())
3573         return wxACC_FAIL;
3574
3575     return wxACC_NOT_IMPLEMENTED;
3576 }
3577
3578 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3579 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3580 {
3581     wxASSERT( GetWindow() != NULL );
3582     if (!GetWindow())
3583         return wxACC_FAIL;
3584
3585     wxWindow* win = NULL;
3586     if (elementId == 0)
3587     {
3588         win = GetWindow();
3589     }
3590     else
3591     {
3592         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3593         {
3594             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3595         }
3596         else
3597             return wxACC_FAIL;
3598     }
3599     if (win)
3600     {
3601         rect = win->GetRect();
3602         if (win->GetParent() && !wxDynamicCast(win, wxTopLevelWindow))
3603             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3604         return wxACC_OK;
3605     }
3606
3607     return wxACC_NOT_IMPLEMENTED;
3608 }
3609
3610 // Navigates from fromId to toId/toObject.
3611 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3612                              int* WXUNUSED(toId), wxAccessible** toObject)
3613 {
3614     wxASSERT( GetWindow() != NULL );
3615     if (!GetWindow())
3616         return wxACC_FAIL;
3617
3618     switch (navDir)
3619     {
3620     case wxNAVDIR_FIRSTCHILD:
3621         {
3622             if (GetWindow()->GetChildren().GetCount() == 0)
3623                 return wxACC_FALSE;
3624             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3625             *toObject = childWindow->GetOrCreateAccessible();
3626
3627             return wxACC_OK;
3628         }
3629     case wxNAVDIR_LASTCHILD:
3630         {
3631             if (GetWindow()->GetChildren().GetCount() == 0)
3632                 return wxACC_FALSE;
3633             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3634             *toObject = childWindow->GetOrCreateAccessible();
3635
3636             return wxACC_OK;
3637         }
3638     case wxNAVDIR_RIGHT:
3639     case wxNAVDIR_DOWN:
3640     case wxNAVDIR_NEXT:
3641         {
3642             wxWindowList::compatibility_iterator node =
3643                 wxWindowList::compatibility_iterator();
3644             if (fromId == 0)
3645             {
3646                 // Can't navigate to sibling of this window
3647                 // if we're a top-level window.
3648                 if (!GetWindow()->GetParent())
3649                     return wxACC_NOT_IMPLEMENTED;
3650
3651                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3652             }
3653             else
3654             {
3655                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3656                     node = GetWindow()->GetChildren().Item(fromId-1);
3657             }
3658
3659             if (node && node->GetNext())
3660             {
3661                 wxWindow* nextWindow = node->GetNext()->GetData();
3662                 *toObject = nextWindow->GetOrCreateAccessible();
3663                 return wxACC_OK;
3664             }
3665             else
3666                 return wxACC_FALSE;
3667         }
3668     case wxNAVDIR_LEFT:
3669     case wxNAVDIR_UP:
3670     case wxNAVDIR_PREVIOUS:
3671         {
3672             wxWindowList::compatibility_iterator node =
3673                 wxWindowList::compatibility_iterator();
3674             if (fromId == 0)
3675             {
3676                 // Can't navigate to sibling of this window
3677                 // if we're a top-level window.
3678                 if (!GetWindow()->GetParent())
3679                     return wxACC_NOT_IMPLEMENTED;
3680
3681                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3682             }
3683             else
3684             {
3685                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3686                     node = GetWindow()->GetChildren().Item(fromId-1);
3687             }
3688
3689             if (node && node->GetPrevious())
3690             {
3691                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3692                 *toObject = previousWindow->GetOrCreateAccessible();
3693                 return wxACC_OK;
3694             }
3695             else
3696                 return wxACC_FALSE;
3697         }
3698     }
3699
3700     return wxACC_NOT_IMPLEMENTED;
3701 }
3702
3703 // Gets the name of the specified object.
3704 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3705 {
3706     wxASSERT( GetWindow() != NULL );
3707     if (!GetWindow())
3708         return wxACC_FAIL;
3709
3710     wxString title;
3711
3712     // If a child, leave wxWidgets to call the function on the actual
3713     // child object.
3714     if (childId > 0)
3715         return wxACC_NOT_IMPLEMENTED;
3716
3717     // This will eventually be replaced by specialised
3718     // accessible classes, one for each kind of wxWidgets
3719     // control or window.
3720 #if wxUSE_BUTTON
3721     if (wxDynamicCast(GetWindow(), wxButton))
3722         title = ((wxButton*) GetWindow())->GetLabel();
3723     else
3724 #endif
3725         title = GetWindow()->GetName();
3726
3727     if (!title.empty())
3728     {
3729         *name = title;
3730         return wxACC_OK;
3731     }
3732     else
3733         return wxACC_NOT_IMPLEMENTED;
3734 }
3735
3736 // Gets the number of children.
3737 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3738 {
3739     wxASSERT( GetWindow() != NULL );
3740     if (!GetWindow())
3741         return wxACC_FAIL;
3742
3743     *childId = (int) GetWindow()->GetChildren().GetCount();
3744     return wxACC_OK;
3745 }
3746
3747 // Gets the specified child (starting from 1).
3748 // If *child is NULL and return value is wxACC_OK,
3749 // this means that the child is a simple element and
3750 // not an accessible object.
3751 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3752 {
3753     wxASSERT( GetWindow() != NULL );
3754     if (!GetWindow())
3755         return wxACC_FAIL;
3756
3757     if (childId == 0)
3758     {
3759         *child = this;
3760         return wxACC_OK;
3761     }
3762
3763     if (childId > (int) GetWindow()->GetChildren().GetCount())
3764         return wxACC_FAIL;
3765
3766     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3767     *child = childWindow->GetOrCreateAccessible();
3768     if (*child)
3769         return wxACC_OK;
3770     else
3771         return wxACC_FAIL;
3772 }
3773
3774 // Gets the parent, or NULL.
3775 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3776 {
3777     wxASSERT( GetWindow() != NULL );
3778     if (!GetWindow())
3779         return wxACC_FAIL;
3780
3781     wxWindow* parentWindow = GetWindow()->GetParent();
3782     if (!parentWindow)
3783     {
3784         *parent = NULL;
3785         return wxACC_OK;
3786     }
3787     else
3788     {
3789         *parent = parentWindow->GetOrCreateAccessible();
3790         if (*parent)
3791             return wxACC_OK;
3792         else
3793             return wxACC_FAIL;
3794     }
3795 }
3796
3797 // Performs the default action. childId is 0 (the action for this object)
3798 // or > 0 (the action for a child).
3799 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3800 // window (e.g. an edit control).
3801 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3802 {
3803     wxASSERT( GetWindow() != NULL );
3804     if (!GetWindow())
3805         return wxACC_FAIL;
3806
3807     return wxACC_NOT_IMPLEMENTED;
3808 }
3809
3810 // Gets the default action for this object (0) or > 0 (the action for a child).
3811 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3812 // string if there is no action.
3813 // The retrieved string describes the action that is performed on an object,
3814 // not what the object does as a result. For example, a toolbar button that prints
3815 // a document has a default action of "Press" rather than "Prints the current document."
3816 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3817 {
3818     wxASSERT( GetWindow() != NULL );
3819     if (!GetWindow())
3820         return wxACC_FAIL;
3821
3822     return wxACC_NOT_IMPLEMENTED;
3823 }
3824
3825 // Returns the description for this object or a child.
3826 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3827 {
3828     wxASSERT( GetWindow() != NULL );
3829     if (!GetWindow())
3830         return wxACC_FAIL;
3831
3832     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3833     if (!ht.empty())
3834     {
3835         *description = ht;
3836         return wxACC_OK;
3837     }
3838     return wxACC_NOT_IMPLEMENTED;
3839 }
3840
3841 // Returns help text for this object or a child, similar to tooltip text.
3842 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3843 {
3844     wxASSERT( GetWindow() != NULL );
3845     if (!GetWindow())
3846         return wxACC_FAIL;
3847
3848     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3849     if (!ht.empty())
3850     {
3851         *helpText = ht;
3852         return wxACC_OK;
3853     }
3854     return wxACC_NOT_IMPLEMENTED;
3855 }
3856
3857 // Returns the keyboard shortcut for this object or child.
3858 // Return e.g. ALT+K
3859 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3860 {
3861     wxASSERT( GetWindow() != NULL );
3862     if (!GetWindow())
3863         return wxACC_FAIL;
3864
3865     return wxACC_NOT_IMPLEMENTED;
3866 }
3867
3868 // Returns a role constant.
3869 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3870 {
3871     wxASSERT( GetWindow() != NULL );
3872     if (!GetWindow())
3873         return wxACC_FAIL;
3874
3875     // If a child, leave wxWidgets to call the function on the actual
3876     // child object.
3877     if (childId > 0)
3878         return wxACC_NOT_IMPLEMENTED;
3879
3880     if (wxDynamicCast(GetWindow(), wxControl))
3881         return wxACC_NOT_IMPLEMENTED;
3882 #if wxUSE_STATUSBAR
3883     if (wxDynamicCast(GetWindow(), wxStatusBar))
3884         return wxACC_NOT_IMPLEMENTED;
3885 #endif
3886 #if wxUSE_TOOLBAR
3887     if (wxDynamicCast(GetWindow(), wxToolBar))
3888         return wxACC_NOT_IMPLEMENTED;
3889 #endif
3890
3891     //*role = wxROLE_SYSTEM_CLIENT;
3892     *role = wxROLE_SYSTEM_CLIENT;
3893     return wxACC_OK;
3894
3895     #if 0
3896     return wxACC_NOT_IMPLEMENTED;
3897     #endif
3898 }
3899
3900 // Returns a state constant.
3901 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3902 {
3903     wxASSERT( GetWindow() != NULL );
3904     if (!GetWindow())
3905         return wxACC_FAIL;
3906
3907     // If a child, leave wxWidgets to call the function on the actual
3908     // child object.
3909     if (childId > 0)
3910         return wxACC_NOT_IMPLEMENTED;
3911
3912     if (wxDynamicCast(GetWindow(), wxControl))
3913         return wxACC_NOT_IMPLEMENTED;
3914
3915 #if wxUSE_STATUSBAR
3916     if (wxDynamicCast(GetWindow(), wxStatusBar))
3917         return wxACC_NOT_IMPLEMENTED;
3918 #endif
3919 #if wxUSE_TOOLBAR
3920     if (wxDynamicCast(GetWindow(), wxToolBar))
3921         return wxACC_NOT_IMPLEMENTED;
3922 #endif
3923
3924     *state = 0;
3925     return wxACC_OK;
3926
3927     #if 0
3928     return wxACC_NOT_IMPLEMENTED;
3929     #endif
3930 }
3931
3932 // Returns a localized string representing the value for the object
3933 // or child.
3934 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3935 {
3936     wxASSERT( GetWindow() != NULL );
3937     if (!GetWindow())
3938         return wxACC_FAIL;
3939
3940     return wxACC_NOT_IMPLEMENTED;
3941 }
3942
3943 // Selects the object or child.
3944 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3945 {
3946     wxASSERT( GetWindow() != NULL );
3947     if (!GetWindow())
3948         return wxACC_FAIL;
3949
3950     return wxACC_NOT_IMPLEMENTED;
3951 }
3952
3953 // Gets the window with the keyboard focus.
3954 // If childId is 0 and child is NULL, no object in
3955 // this subhierarchy has the focus.
3956 // If this object has the focus, child should be 'this'.
3957 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3958 {
3959     wxASSERT( GetWindow() != NULL );
3960     if (!GetWindow())
3961         return wxACC_FAIL;
3962
3963     return wxACC_NOT_IMPLEMENTED;
3964 }
3965
3966 #if wxUSE_VARIANT
3967 // Gets a variant representing the selected children
3968 // of this object.
3969 // Acceptable values:
3970 // - a null variant (IsNull() returns true)
3971 // - a list variant (GetType() == wxT("list")
3972 // - an integer representing the selected child element,
3973 //   or 0 if this object is selected (GetType() == wxT("long")
3974 // - a "void*" pointer to a wxAccessible child object
3975 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3976 {
3977     wxASSERT( GetWindow() != NULL );
3978     if (!GetWindow())
3979         return wxACC_FAIL;
3980
3981     return wxACC_NOT_IMPLEMENTED;
3982 }
3983 #endif // wxUSE_VARIANT
3984
3985 #endif // wxUSE_ACCESSIBILITY
3986
3987 // ----------------------------------------------------------------------------
3988 // RTL support
3989 // ----------------------------------------------------------------------------
3990
3991 wxCoord
3992 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3993                                        wxCoord width,
3994                                        wxCoord widthTotal) const
3995 {
3996     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3997     {
3998         x = widthTotal - x - width;
3999     }
4000
4001     return x;
4002 }
4003
4004