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 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #ifndef WX_PRECOMP
  28     #include "wx/string.h"
  29     #include "wx/log.h"
  30     #include "wx/intl.h"
  31     #include "wx/frame.h"
  32     #include "wx/window.h"
  33     #include "wx/control.h"
  34     #include "wx/checkbox.h"
  35     #include "wx/radiobut.h"
  36     #include "wx/statbox.h"
  37     #include "wx/textctrl.h"
  38     #include "wx/settings.h"
  39     #include "wx/dialog.h"
  40     #include "wx/msgdlg.h"
  41     #include "wx/msgout.h"
  42     #include "wx/statusbr.h"
  43     #include "wx/toolbar.h"
  44     #include "wx/dcclient.h"
  45     #include "wx/scrolbar.h"
  46     #include "wx/layout.h"
  47     #include "wx/sizer.h"
  48     #include "wx/menu.h"
  49 #endif //WX_PRECOMP
  50
  51 #if wxUSE_DRAG_AND_DROP
  52     #include "wx/dnd.h"
  53 #endif // wxUSE_DRAG_AND_DROP
  54
  55 #if wxUSE_ACCESSIBILITY
  56     #include "wx/access.h"
  57 #endif
  58
  59 #if wxUSE_HELP
  60     #include "wx/cshelp.h"
  61 #endif // wxUSE_HELP
  62
  63 #if wxUSE_TOOLTIPS
  64     #include "wx/tooltip.h"
  65 #endif // wxUSE_TOOLTIPS
  66
  67 #if wxUSE_CARET
  68     #include "wx/caret.h"
  69 #endif // wxUSE_CARET
  70
  71 #if wxUSE_SYSTEM_OPTIONS
  72     #include "wx/sysopt.h"
  73 #endif
  74
  75 #include "wx/platinfo.h"
  76 #include "wx/private/window.h"
  77
  78 #ifdef __WINDOWS__
  79     #include "wx/msw/wrapwin.h"
  80 #endif
  81
  82 // Windows List
  83 WXDLLIMPEXP_DATA_CORE(wxWindowList) wxTopLevelWindows;
  84
  85 // globals
  86 #if wxUSE_MENUS
  87 wxMenu *wxCurrentPopupMenu = NULL;
  88 #endif // wxUSE_MENUS
  89
  90 extern WXDLLEXPORT_DATA(const char) wxPanelNameStr[] = "panel";
  91
  92 // ----------------------------------------------------------------------------
  93 // static data
  94 // ----------------------------------------------------------------------------
  95
  96
  97 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  98
  99 // ----------------------------------------------------------------------------
 100 // event table
 101 // ----------------------------------------------------------------------------
 102
 103 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
 104     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
 105     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
 106     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
 107
 108 #if wxUSE_HELP
 109     EVT_HELP(wxID_ANY, wxWindowBase::OnHelp)
 110 #endif // wxUSE_HELP
 111
 112     EVT_SIZE(wxWindowBase::InternalOnSize)
 113 END_EVENT_TABLE()
 114
 115 // ============================================================================
 116 // implementation of the common functionality of the wxWindow class
 117 // ============================================================================
 118
 119 // ----------------------------------------------------------------------------
 120 // XTI
 121 // ----------------------------------------------------------------------------
 122
 123 #if wxUSE_EXTENDED_RTTI
 124
 125 // windows that are created from a parent window during its Create method,
 126 // eg. spin controls in a calendar controls must never been streamed out
 127 // separately otherwise chaos occurs. Right now easiest is to test for negative ids,
 128 // as windows with negative ids never can be recreated anyway
 129
 130
 131 bool wxWindowStreamingCallback( const wxObject *object, wxObjectWriter *,
 132                                wxObjectWriterCallback *, const wxStringToAnyHashMap & )
 133 {
 134     const wxWindow * win = wx_dynamic_cast(const wxWindow*, object);
 135     if ( win && win->GetId() < 0 )
 136         return false;
 137     return true;
 138 }
 139
 140 wxIMPLEMENT_DYNAMIC_CLASS_XTI_CALLBACK(wxWindow, wxWindowBase, "wx/window.h", \
 141                                        wxWindowStreamingCallback)
 142
 143 // make wxWindowList known before the property is used
 144
 145 wxCOLLECTION_TYPE_INFO( wxWindow*, wxWindowList );
 146
 147 template<> void wxCollectionToVariantArray( wxWindowList const &theList,
 148                                            wxAnyList &value)
 149 {
 150     wxListCollectionToAnyList<wxWindowList::compatibility_iterator>( theList, value );
 151 }
 152
 153 wxDEFINE_FLAGS( wxWindowStyle )
 154
 155 wxBEGIN_FLAGS( wxWindowStyle )
 156 // new style border flags, we put them first to
 157 // use them for streaming out
 158
 159 wxFLAGS_MEMBER(wxBORDER_SIMPLE)
 160 wxFLAGS_MEMBER(wxBORDER_SUNKEN)
 161 wxFLAGS_MEMBER(wxBORDER_DOUBLE)
 162 wxFLAGS_MEMBER(wxBORDER_RAISED)
 163 wxFLAGS_MEMBER(wxBORDER_STATIC)
 164 wxFLAGS_MEMBER(wxBORDER_NONE)
 165
 166 // old style border flags
 167 wxFLAGS_MEMBER(wxSIMPLE_BORDER)
 168 wxFLAGS_MEMBER(wxSUNKEN_BORDER)
 169 wxFLAGS_MEMBER(wxDOUBLE_BORDER)
 170 wxFLAGS_MEMBER(wxRAISED_BORDER)
 171 wxFLAGS_MEMBER(wxSTATIC_BORDER)
 172 wxFLAGS_MEMBER(wxBORDER)
 173
 174 // standard window styles
 175 wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
 176 wxFLAGS_MEMBER(wxCLIP_CHILDREN)
 177 wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
 178 wxFLAGS_MEMBER(wxWANTS_CHARS)
 179 wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
 180 wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
 181 wxFLAGS_MEMBER(wxVSCROLL)
 182 wxFLAGS_MEMBER(wxHSCROLL)
 183
 184 wxEND_FLAGS( wxWindowStyle )
 185
 186 wxBEGIN_PROPERTIES_TABLE(wxWindow)
 187 wxEVENT_PROPERTY( Close, wxEVT_CLOSE_WINDOW, wxCloseEvent)
 188 wxEVENT_PROPERTY( Create, wxEVT_CREATE, wxWindowCreateEvent )
 189 wxEVENT_PROPERTY( Destroy, wxEVT_DESTROY, wxWindowDestroyEvent )
 190 // Always constructor Properties first
 191
 192 wxREADONLY_PROPERTY( Parent,wxWindow*, GetParent, wxEMPTY_PARAMETER_VALUE, \
 193                     0 /*flags*/, wxT("Helpstring"), wxT("group"))
 194 wxPROPERTY( Id,wxWindowID, SetId, GetId, -1 /*wxID_ANY*/, 0 /*flags*/, \
 195            wxT("Helpstring"), wxT("group") )
 196 wxPROPERTY( Position,wxPoint, SetPosition, GetPosition, wxDefaultPosition, \
 197            0 /*flags*/, wxT("Helpstring"), wxT("group")) // pos
 198 wxPROPERTY( Size,wxSize, SetSize, GetSize, wxDefaultSize, 0 /*flags*/, \
 199            wxT("Helpstring"), wxT("group")) // size
 200 wxPROPERTY( WindowStyle, long, SetWindowStyleFlag, GetWindowStyleFlag, \
 201            wxEMPTY_PARAMETER_VALUE, 0 /*flags*/, wxT("Helpstring"), wxT("group")) // style
 202 wxPROPERTY( Name,wxString, SetName, GetName, wxEmptyString, 0 /*flags*/, \
 203            wxT("Helpstring"), wxT("group") )
 204
 205 // Then all relations of the object graph
 206
 207 wxREADONLY_PROPERTY_COLLECTION( Children, wxWindowList, wxWindowBase*, \
 208                                GetWindowChildren, wxPROP_OBJECT_GRAPH /*flags*/, \
 209                                wxT("Helpstring"), wxT("group"))
 210
 211 // and finally all other properties
 212
 213 wxPROPERTY( ExtraStyle, long, SetExtraStyle, GetExtraStyle, wxEMPTY_PARAMETER_VALUE, \
 214            0 /*flags*/, wxT("Helpstring"), wxT("group")) // extstyle
 215 wxPROPERTY( BackgroundColour, wxColour, SetBackgroundColour, GetBackgroundColour, \
 216            wxEMPTY_PARAMETER_VALUE, 0 /*flags*/, wxT("Helpstring"), wxT("group")) // bg
 217 wxPROPERTY( ForegroundColour, wxColour, SetForegroundColour, GetForegroundColour, \
 218            wxEMPTY_PARAMETER_VALUE, 0 /*flags*/, wxT("Helpstring"), wxT("group")) // fg
 219 wxPROPERTY( Enabled, bool, Enable, IsEnabled, wxAny((bool)true), 0 /*flags*/, \
 220            wxT("Helpstring"), wxT("group"))
 221 wxPROPERTY( Shown, bool, Show, IsShown, wxAny((bool)true), 0 /*flags*/, \
 222            wxT("Helpstring"), wxT("group"))
 223
 224 #if 0
 225 // possible property candidates (not in xrc) or not valid in all subclasses
 226 wxPROPERTY( Title,wxString, SetTitle, GetTitle, wxEmptyString )
 227 wxPROPERTY( Font, wxFont, SetFont, GetWindowFont , )
 228 wxPROPERTY( Label,wxString, SetLabel, GetLabel, wxEmptyString )
 229 // MaxHeight, Width, MinHeight, Width
 230 // TODO switch label to control and title to toplevels
 231
 232 wxPROPERTY( ThemeEnabled, bool, SetThemeEnabled, GetThemeEnabled, )
 233 //wxPROPERTY( Cursor, wxCursor, SetCursor, GetCursor, )
 234 // wxPROPERTY( ToolTip, wxString, SetToolTip, GetToolTipText, )
 235 wxPROPERTY( AutoLayout, bool, SetAutoLayout, GetAutoLayout, )
 236 #endif
 237 wxEND_PROPERTIES_TABLE()
 238
 239 wxEMPTY_HANDLERS_TABLE(wxWindow)
 240
 241 wxCONSTRUCTOR_DUMMY(wxWindow)
 242
 243 #else
 244
 245 #ifndef __WXUNIVERSAL__
 246 IMPLEMENT_DYNAMIC_CLASS(wxWindow, wxWindowBase)
 247 #endif
 248
 249 #endif
 250
 251 // ----------------------------------------------------------------------------
 252 // initialization
 253 // ----------------------------------------------------------------------------
 254
 255 // the default initialization
 256 wxWindowBase::wxWindowBase()
 257 {
 258     // no window yet, no parent nor children
 259     m_parent = NULL;
 260     m_windowId = wxID_ANY;
 261
 262     // no constraints on the minimal window size
 263     m_minWidth =
 264     m_maxWidth = wxDefaultCoord;
 265     m_minHeight =
 266     m_maxHeight = wxDefaultCoord;
 267
 268     // invalidiated cache value
 269     m_bestSizeCache = wxDefaultSize;
 270
 271     // window are created enabled and visible by default
 272     m_isShown =
 273     m_isEnabled = true;
 274
 275     // the default event handler is just this window
 276     m_eventHandler = this;
 277
 278 #if wxUSE_VALIDATORS
 279     // no validator
 280     m_windowValidator = NULL;
 281 #endif // wxUSE_VALIDATORS
 282
 283     // the colours/fonts are default for now, so leave m_font,
 284     // m_backgroundColour and m_foregroundColour uninitialized and set those
 285     m_hasBgCol =
 286     m_hasFgCol =
 287     m_hasFont = false;
 288     m_inheritBgCol =
 289     m_inheritFgCol =
 290     m_inheritFont = false;
 291
 292     // no style bits
 293     m_exStyle =
 294     m_windowStyle = 0;
 295
 296     m_backgroundStyle = wxBG_STYLE_ERASE;
 297
 298 #if wxUSE_CONSTRAINTS
 299     // no constraints whatsoever
 300     m_constraints = NULL;
 301     m_constraintsInvolvedIn = NULL;
 302 #endif // wxUSE_CONSTRAINTS
 303
 304     m_windowSizer = NULL;
 305     m_containingSizer = NULL;
 306     m_autoLayout = false;
 307
 308 #if wxUSE_DRAG_AND_DROP
 309     m_dropTarget = NULL;
 310 #endif // wxUSE_DRAG_AND_DROP
 311
 312 #if wxUSE_TOOLTIPS
 313     m_tooltip = NULL;
 314 #endif // wxUSE_TOOLTIPS
 315
 316 #if wxUSE_CARET
 317     m_caret = NULL;
 318 #endif // wxUSE_CARET
 319
 320 #if wxUSE_PALETTE
 321     m_hasCustomPalette = false;
 322 #endif // wxUSE_PALETTE
 323
 324 #if wxUSE_ACCESSIBILITY
 325     m_accessible = NULL;
 326 #endif
 327
 328     m_virtualSize = wxDefaultSize;
 329
 330     m_scrollHelper = NULL;
 331
 332     m_windowVariant = wxWINDOW_VARIANT_NORMAL;
 333 #if wxUSE_SYSTEM_OPTIONS
 334     if ( wxSystemOptions::HasOption(wxWINDOW_DEFAULT_VARIANT) )
 335     {
 336        m_windowVariant = (wxWindowVariant) wxSystemOptions::GetOptionInt( wxWINDOW_DEFAULT_VARIANT ) ;
 337     }
 338 #endif
 339
 340     // Whether we're using the current theme for this window (wxGTK only for now)
 341     m_themeEnabled = false;
 342
 343     // This is set to true by SendDestroyEvent() which should be called by the
 344     // most derived class to ensure that the destruction event is sent as soon
 345     // as possible to allow its handlers to still see the undestroyed window
 346     m_isBeingDeleted = false;
 347
 348     m_freezeCount = 0;
 349 }
 350
 351 // common part of window creation process
 352 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 353                               wxWindowID id,
 354                               const wxPoint& WXUNUSED(pos),
 355                               const wxSize& size,
 356                               long style,
 357                               const wxString& name)
 358 {
 359     // ids are limited to 16 bits under MSW so if you care about portability,
 360     // it's not a good idea to use ids out of this range (and negative ids are
 361     // reserved for wxWidgets own usage)
 362     wxASSERT_MSG( id == wxID_ANY || (id >= 0 && id < 32767) ||
 363                   (id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST),
 364                   wxT("invalid id value") );
 365
 366     // generate a new id if the user doesn't care about it
 367     if ( id == wxID_ANY )
 368     {
 369         m_windowId = NewControlId();
 370     }
 371     else // valid id specified
 372     {
 373         m_windowId = id;
 374     }
 375
 376     // don't use SetWindowStyleFlag() here, this function should only be called
 377     // to change the flag after creation as it tries to reflect the changes in
 378     // flags by updating the window dynamically and we don't need this here
 379     m_windowStyle = style;
 380
 381     // assume the user doesn't want this window to shrink beneath its initial
 382     // size, this worked like this in wxWidgets 2.8 and before and generally
 383     // often makes sense for child windows (for top level ones it definitely
 384     // does not as the user should be able to resize the window)
 385     //
 386     // note that we can't use IsTopLevel() from ctor
 387     if ( size != wxDefaultSize && !wxTopLevelWindows.Find((wxWindow *)this) )
 388         SetMinSize(size);
 389
 390     SetName(name);
 391     SetParent(parent);
 392
 393     return true;
 394 }
 395
 396 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 397                               wxWindowID id,
 398                               const wxPoint& pos,
 399                               const wxSize& size,
 400                               long style,
 401                               const wxValidator& wxVALIDATOR_PARAM(validator),
 402                               const wxString& name)
 403 {
 404     if ( !CreateBase(parent, id, pos, size, style, name) )
 405         return false;
 406
 407 #if wxUSE_VALIDATORS
 408     SetValidator(validator);
 409 #endif // wxUSE_VALIDATORS
 410
 411     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 412     // have it too - like this it's possible to set it only in the top level
 413     // dialog/frame and all children will inherit it by defult
 414     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 415     {
 416         SetExtraStyle(GetExtraStyle() | wxWS_EX_VALIDATE_RECURSIVELY);
 417     }
 418
 419     return true;
 420 }
 421
 422 bool wxWindowBase::ToggleWindowStyle(int flag)
 423 {
 424     wxASSERT_MSG( flag, wxT("flags with 0 value can't be toggled") );
 425
 426     bool rc;
 427     long style = GetWindowStyleFlag();
 428     if ( style & flag )
 429     {
 430         style &= ~flag;
 431         rc = false;
 432     }
 433     else // currently off
 434     {
 435         style |= flag;
 436         rc = true;
 437     }
 438
 439     SetWindowStyleFlag(style);
 440
 441     return rc;
 442 }
 443
 444 // ----------------------------------------------------------------------------
 445 // destruction
 446 // ----------------------------------------------------------------------------
 447
 448 // common clean up
 449 wxWindowBase::~wxWindowBase()
 450 {
 451     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 452
 453     // FIXME if these 2 cases result from programming errors in the user code
 454     //       we should probably assert here instead of silently fixing them
 455
 456     // Just in case the window has been Closed, but we're then deleting
 457     // immediately: don't leave dangling pointers.
 458     wxPendingDelete.DeleteObject(this);
 459
 460     // Just in case we've loaded a top-level window via LoadNativeDialog but
 461     // we weren't a dialog class
 462     wxTopLevelWindows.DeleteObject((wxWindow*)this);
 463
 464     // Any additional event handlers should be popped before the window is
 465     // deleted as otherwise the last handler will be left with a dangling
 466     // pointer to this window result in a difficult to diagnose crash later on.
 467     wxASSERT_MSG( GetEventHandler() == this,
 468                     wxT("any pushed event handlers must have been removed") );
 469
 470 #if wxUSE_MENUS
 471     // The associated popup menu can still be alive, disassociate from it in
 472     // this case
 473     if ( wxCurrentPopupMenu && wxCurrentPopupMenu->GetInvokingWindow() == this )
 474         wxCurrentPopupMenu->SetInvokingWindow(NULL);
 475 #endif // wxUSE_MENUS
 476
 477     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 478
 479     // notify the parent about this window destruction
 480     if ( m_parent )
 481         m_parent->RemoveChild(this);
 482
 483 #if wxUSE_CARET
 484     delete m_caret;
 485 #endif // wxUSE_CARET
 486
 487 #if wxUSE_VALIDATORS
 488     delete m_windowValidator;
 489 #endif // wxUSE_VALIDATORS
 490
 491 #if wxUSE_CONSTRAINTS
 492     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 493     // at deleted windows as they delete themselves.
 494     DeleteRelatedConstraints();
 495
 496     if ( m_constraints )
 497     {
 498         // This removes any dangling pointers to this window in other windows'
 499         // constraintsInvolvedIn lists.
 500         UnsetConstraints(m_constraints);
 501         wxDELETE(m_constraints);
 502     }
 503 #endif // wxUSE_CONSTRAINTS
 504
 505     if ( m_containingSizer )
 506         m_containingSizer->Detach( (wxWindow*)this );
 507
 508     delete m_windowSizer;
 509
 510 #if wxUSE_DRAG_AND_DROP
 511     delete m_dropTarget;
 512 #endif // wxUSE_DRAG_AND_DROP
 513
 514 #if wxUSE_TOOLTIPS
 515     delete m_tooltip;
 516 #endif // wxUSE_TOOLTIPS
 517
 518 #if wxUSE_ACCESSIBILITY
 519     delete m_accessible;
 520 #endif
 521
 522 #if wxUSE_HELP
 523     // NB: this has to be called unconditionally, because we don't know
 524     //     whether this window has associated help text or not
 525     wxHelpProvider *helpProvider = wxHelpProvider::Get();
 526     if ( helpProvider )
 527         helpProvider->RemoveHelp(this);
 528 #endif
 529 }
 530
 531 bool wxWindowBase::IsBeingDeleted() const
 532 {
 533     return m_isBeingDeleted ||
 534             (!IsTopLevel() && m_parent && m_parent->IsBeingDeleted());
 535 }
 536
 537 void wxWindowBase::SendDestroyEvent()
 538 {
 539     if ( m_isBeingDeleted )
 540     {
 541         // we could have been already called from a more derived class dtor,
 542         // e.g. ~wxTLW calls us and so does ~wxWindow and the latter call
 543         // should be simply ignored
 544         return;
 545     }
 546
 547     m_isBeingDeleted = true;
 548
 549     wxWindowDestroyEvent event;
 550     event.SetEventObject(this);
 551     event.SetId(GetId());
 552     GetEventHandler()->ProcessEvent(event);
 553 }
 554
 555 bool wxWindowBase::Destroy()
 556 {
 557     // If our handle is invalid, it means that this window has never been
 558     // created, either because creating it failed or, more typically, because
 559     // this wxWindow object was default-constructed and its Create() method had
 560     // never been called. As we didn't send wxWindowCreateEvent in this case
 561     // (which is sent after successful creation), don't send the matching
 562     // wxWindowDestroyEvent neither.
 563     if ( GetHandle() )
 564         SendDestroyEvent();
 565
 566     delete this;
 567
 568     return true;
 569 }
 570
 571 bool wxWindowBase::Close(bool force)
 572 {
 573     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 574     event.SetEventObject(this);
 575     event.SetCanVeto(!force);
 576
 577     // return false if window wasn't closed because the application vetoed the
 578     // close event
 579     return HandleWindowEvent(event) && !event.GetVeto();
 580 }
 581
 582 bool wxWindowBase::DestroyChildren()
 583 {
 584     wxWindowList::compatibility_iterator node;
 585     for ( ;; )
 586     {
 587         // we iterate until the list becomes empty
 588         node = GetChildren().GetFirst();
 589         if ( !node )
 590             break;
 591
 592         wxWindow *child = node->GetData();
 593
 594         // note that we really want to delete it immediately so don't call the
 595         // possible overridden Destroy() version which might not delete the
 596         // child immediately resulting in problems with our (top level) child
 597         // outliving its parent
 598         child->wxWindowBase::Destroy();
 599
 600         wxASSERT_MSG( !GetChildren().Find(child),
 601                       wxT("child didn't remove itself using RemoveChild()") );
 602     }
 603
 604     return true;
 605 }
 606
 607 // ----------------------------------------------------------------------------
 608 // size/position related methods
 609 // ----------------------------------------------------------------------------
 610
 611 // centre the window with respect to its parent in either (or both) directions
 612 void wxWindowBase::DoCentre(int dir)
 613 {
 614     wxCHECK_RET( !(dir & wxCENTRE_ON_SCREEN) && GetParent(),
 615                  wxT("this method only implements centering child windows") );
 616
 617     SetSize(GetRect().CentreIn(GetParent()->GetClientSize(), dir));
 618 }
 619
 620 // fits the window around the children
 621 void wxWindowBase::Fit()
 622 {
 623     SetSize(GetBestSize());
 624 }
 625
 626 // fits virtual size (ie. scrolled area etc.) around children
 627 void wxWindowBase::FitInside()
 628 {
 629     SetVirtualSize( GetBestVirtualSize() );
 630 }
 631
 632 // On Mac, scrollbars are explicitly children.
 633 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 634 static bool wxHasRealChildren(const wxWindowBase* win)
 635 {
 636     int realChildCount = 0;
 637
 638     for ( wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 639           node;
 640           node = node->GetNext() )
 641     {
 642         wxWindow *win = node->GetData();
 643         if ( !win->IsTopLevel() && win->IsShown()
 644 #if wxUSE_SCROLLBAR
 645             && !wxDynamicCast(win, wxScrollBar)
 646 #endif
 647             )
 648             realChildCount ++;
 649     }
 650     return (realChildCount > 0);
 651 }
 652 #endif
 653
 654 void wxWindowBase::InvalidateBestSize()
 655 {
 656     m_bestSizeCache = wxDefaultSize;
 657
 658     // parent's best size calculation may depend on its children's
 659     // as long as child window we are in is not top level window itself
 660     // (because the TLW size is never resized automatically)
 661     // so let's invalidate it as well to be safe:
 662     if (m_parent && !IsTopLevel())
 663         m_parent->InvalidateBestSize();
 664 }
 665
 666 // return the size best suited for the current window
 667 wxSize wxWindowBase::DoGetBestSize() const
 668 {
 669     wxSize best;
 670
 671     if ( m_windowSizer )
 672     {
 673         best = m_windowSizer->GetMinSize();
 674     }
 675 #if wxUSE_CONSTRAINTS
 676     else if ( m_constraints )
 677     {
 678         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 679
 680         // our minimal acceptable size is such that all our windows fit inside
 681         int maxX = 0,
 682             maxY = 0;
 683
 684         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 685               node;
 686               node = node->GetNext() )
 687         {
 688             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 689             if ( !c )
 690             {
 691                 // it's not normal that we have an unconstrained child, but
 692                 // what can we do about it?
 693                 continue;
 694             }
 695
 696             int x = c->right.GetValue(),
 697                 y = c->bottom.GetValue();
 698
 699             if ( x > maxX )
 700                 maxX = x;
 701
 702             if ( y > maxY )
 703                 maxY = y;
 704
 705             // TODO: we must calculate the overlaps somehow, otherwise we
 706             //       will never return a size bigger than the current one :-(
 707         }
 708
 709         best = wxSize(maxX, maxY);
 710     }
 711 #endif // wxUSE_CONSTRAINTS
 712     else if ( !GetChildren().empty()
 713 #if defined( __WXMAC__ ) && !defined(__WXUNIVERSAL__)
 714               && wxHasRealChildren(this)
 715 #endif
 716               )
 717     {
 718         // our minimal acceptable size is such that all our visible child
 719         // windows fit inside
 720         int maxX = 0,
 721             maxY = 0;
 722
 723         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 724               node;
 725               node = node->GetNext() )
 726         {
 727             wxWindow *win = node->GetData();
 728             if ( win->IsTopLevel()
 729                     || !win->IsShown()
 730 #if wxUSE_STATUSBAR
 731                         || wxDynamicCast(win, wxStatusBar)
 732 #endif // wxUSE_STATUSBAR
 733                )
 734             {
 735                 // dialogs and frames lie in different top level windows -
 736                 // don't deal with them here; as for the status bars, they
 737                 // don't lie in the client area at all
 738                 continue;
 739             }
 740
 741             int wx, wy, ww, wh;
 742             win->GetPosition(&wx, &wy);
 743
 744             // if the window hadn't been positioned yet, assume that it is in
 745             // the origin
 746             if ( wx == wxDefaultCoord )
 747                 wx = 0;
 748             if ( wy == wxDefaultCoord )
 749                 wy = 0;
 750
 751             win->GetSize(&ww, &wh);
 752             if ( wx + ww > maxX )
 753                 maxX = wx + ww;
 754             if ( wy + wh > maxY )
 755                 maxY = wy + wh;
 756         }
 757
 758         best = wxSize(maxX, maxY);
 759     }
 760     else // ! has children
 761     {
 762         wxSize size = GetMinSize();
 763         if ( !size.IsFullySpecified() )
 764         {
 765             // if the window doesn't define its best size we assume that it can
 766             // be arbitrarily small -- usually this is not the case, of course,
 767             // but we have no way to know what the limit is, it should really
 768             // override DoGetBestClientSize() itself to tell us
 769             size.SetDefaults(wxSize(1, 1));
 770         }
 771
 772         // return as-is, unadjusted by the client size difference.
 773         return size;
 774     }
 775
 776     // Add any difference between size and client size
 777     wxSize diff = GetSize() - GetClientSize();
 778     best.x += wxMax(0, diff.x);
 779     best.y += wxMax(0, diff.y);
 780
 781     return best;
 782 }
 783
 784 // helper of GetWindowBorderSize(): as many ports don't implement support for
 785 // wxSYS_BORDER/EDGE_X/Y metrics in their wxSystemSettings, use hard coded
 786 // fallbacks in this case
 787 static int wxGetMetricOrDefault(wxSystemMetric what, const wxWindowBase* win)
 788 {
 789     int rc = wxSystemSettings::GetMetric(
 790         what, static_cast<wxWindow*>(const_cast<wxWindowBase*>(win)));
 791     if ( rc == -1 )
 792     {
 793         switch ( what )
 794         {
 795             case wxSYS_BORDER_X:
 796             case wxSYS_BORDER_Y:
 797                 // 2D border is by default 1 pixel wide
 798                 rc = 1;
 799                 break;
 800
 801             case wxSYS_EDGE_X:
 802             case wxSYS_EDGE_Y:
 803                 // 3D borders are by default 2 pixels
 804                 rc = 2;
 805                 break;
 806
 807             default:
 808                 wxFAIL_MSG( wxT("unexpected wxGetMetricOrDefault() argument") );
 809                 rc = 0;
 810         }
 811     }
 812
 813     return rc;
 814 }
 815
 816 wxSize wxWindowBase::GetWindowBorderSize() const
 817 {
 818     wxSize size;
 819
 820     switch ( GetBorder() )
 821     {
 822         case wxBORDER_NONE:
 823             // nothing to do, size is already (0, 0)
 824             break;
 825
 826         case wxBORDER_SIMPLE:
 827         case wxBORDER_STATIC:
 828             size.x = wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 829             size.y = wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 830             break;
 831
 832         case wxBORDER_SUNKEN:
 833         case wxBORDER_RAISED:
 834             size.x = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_X, this),
 835                            wxGetMetricOrDefault(wxSYS_BORDER_X, this));
 836             size.y = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_Y, this),
 837                            wxGetMetricOrDefault(wxSYS_BORDER_Y, this));
 838             break;
 839
 840         case wxBORDER_DOUBLE:
 841             size.x = wxGetMetricOrDefault(wxSYS_EDGE_X, this) +
 842                         wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 843             size.y = wxGetMetricOrDefault(wxSYS_EDGE_Y, this) +
 844                         wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 845             break;
 846
 847         default:
 848             wxFAIL_MSG(wxT("Unknown border style."));
 849             break;
 850     }
 851
 852     // we have borders on both sides
 853     return size*2;
 854 }
 855
 856 bool
 857 wxWindowBase::InformFirstDirection(int direction,
 858                                    int size,
 859                                    int availableOtherDir)
 860 {
 861     return GetSizer() && GetSizer()->InformFirstDirection(direction,
 862                                                           size,
 863                                                           availableOtherDir);
 864 }
 865
 866 wxSize wxWindowBase::GetEffectiveMinSize() const
 867 {
 868     // merge the best size with the min size, giving priority to the min size
 869     wxSize min = GetMinSize();
 870
 871     if (min.x == wxDefaultCoord || min.y == wxDefaultCoord)
 872     {
 873         wxSize best = GetBestSize();
 874         if (min.x == wxDefaultCoord) min.x =  best.x;
 875         if (min.y == wxDefaultCoord) min.y =  best.y;
 876     }
 877
 878     return min;
 879 }
 880
 881 wxSize wxWindowBase::DoGetBorderSize() const
 882 {
 883     // there is one case in which we can implement it for all ports easily
 884     if ( GetBorder() == wxBORDER_NONE )
 885         return wxSize(0, 0);
 886
 887     // otherwise use the difference between the real size and the client size
 888     // as a fallback: notice that this is incorrect in general as client size
 889     // also doesn't take the scrollbars into account
 890     return GetSize() - GetClientSize();
 891 }
 892
 893 wxSize wxWindowBase::GetBestSize() const
 894 {
 895     if ( !m_windowSizer && m_bestSizeCache.IsFullySpecified() )
 896         return m_bestSizeCache;
 897
 898     // call DoGetBestClientSize() first, if a derived class overrides it wants
 899     // it to be used
 900     wxSize size = DoGetBestClientSize();
 901     if ( size != wxDefaultSize )
 902         size += DoGetBorderSize();
 903     else
 904         size = DoGetBestSize();
 905
 906     // Ensure that the best size is at least as large as min size.
 907     size.IncTo(GetMinSize());
 908
 909     // And not larger than max size.
 910     size.DecToIfSpecified(GetMaxSize());
 911
 912     // Finally cache result and return.
 913     CacheBestSize(size);
 914     return size;
 915 }
 916
 917 int wxWindowBase::GetBestHeight(int width) const
 918 {
 919     const int height = DoGetBestClientHeight(width);
 920
 921     return height == wxDefaultCoord
 922             ? GetBestSize().y
 923             : height + DoGetBorderSize().y;
 924 }
 925
 926 int wxWindowBase::GetBestWidth(int height) const
 927 {
 928     const int width = DoGetBestClientWidth(height);
 929
 930     return width == wxDefaultCoord
 931             ? GetBestSize().x
 932             : width + DoGetBorderSize().x;
 933 }
 934
 935 void wxWindowBase::SetMinSize(const wxSize& minSize)
 936 {
 937     m_minWidth = minSize.x;
 938     m_minHeight = minSize.y;
 939
 940     InvalidateBestSize();
 941 }
 942
 943 void wxWindowBase::SetMaxSize(const wxSize& maxSize)
 944 {
 945     m_maxWidth = maxSize.x;
 946     m_maxHeight = maxSize.y;
 947
 948     InvalidateBestSize();
 949 }
 950
 951 void wxWindowBase::SetInitialSize(const wxSize& size)
 952 {
 953     // Set the min size to the size passed in.  This will usually either be
 954     // wxDefaultSize or the size passed to this window's ctor/Create function.
 955     SetMinSize(size);
 956
 957     // Merge the size with the best size if needed
 958     wxSize best = GetEffectiveMinSize();
 959
 960     // If the current size doesn't match then change it
 961     if (GetSize() != best)
 962         SetSize(best);
 963 }
 964
 965
 966 // by default the origin is not shifted
 967 wxPoint wxWindowBase::GetClientAreaOrigin() const
 968 {
 969     return wxPoint(0,0);
 970 }
 971
 972 wxSize wxWindowBase::ClientToWindowSize(const wxSize& size) const
 973 {
 974     const wxSize diff(GetSize() - GetClientSize());
 975
 976     return wxSize(size.x == -1 ? -1 : size.x + diff.x,
 977                   size.y == -1 ? -1 : size.y + diff.y);
 978 }
 979
 980 wxSize wxWindowBase::WindowToClientSize(const wxSize& size) const
 981 {
 982     const wxSize diff(GetSize() - GetClientSize());
 983
 984     return wxSize(size.x == -1 ? -1 : size.x - diff.x,
 985                   size.y == -1 ? -1 : size.y - diff.y);
 986 }
 987
 988 void wxWindowBase::SetWindowVariant( wxWindowVariant variant )
 989 {
 990     if ( m_windowVariant != variant )
 991     {
 992         m_windowVariant = variant;
 993
 994         DoSetWindowVariant(variant);
 995     }
 996 }
 997
 998 void wxWindowBase::DoSetWindowVariant( wxWindowVariant variant )
 999 {
1000     // adjust the font height to correspond to our new variant (notice that
1001     // we're only called if something really changed)
1002     wxFont font = GetFont();
1003     int size = font.GetPointSize();
1004     switch ( variant )
1005     {
1006         case wxWINDOW_VARIANT_NORMAL:
1007             break;
1008
1009         case wxWINDOW_VARIANT_SMALL:
1010             size = wxRound(size * 3.0 / 4.0);
1011             break;
1012
1013         case wxWINDOW_VARIANT_MINI:
1014             size = wxRound(size * 2.0 / 3.0);
1015             break;
1016
1017         case wxWINDOW_VARIANT_LARGE:
1018             size = wxRound(size * 5.0 / 4.0);
1019             break;
1020
1021         default:
1022             wxFAIL_MSG(wxT("unexpected window variant"));
1023             break;
1024     }
1025
1026     font.SetPointSize(size);
1027     SetFont(font);
1028 }
1029
1030 void wxWindowBase::DoSetSizeHints( int minW, int minH,
1031                                    int maxW, int maxH,
1032                                    int WXUNUSED(incW), int WXUNUSED(incH) )
1033 {
1034     wxCHECK_RET( (minW == wxDefaultCoord || maxW == wxDefaultCoord || minW <= maxW) &&
1035                     (minH == wxDefaultCoord || maxH == wxDefaultCoord || minH <= maxH),
1036                  wxT("min width/height must be less than max width/height!") );
1037
1038     m_minWidth = minW;
1039     m_maxWidth = maxW;
1040     m_minHeight = minH;
1041     m_maxHeight = maxH;
1042 }
1043
1044
1045 #if WXWIN_COMPATIBILITY_2_8
1046 void wxWindowBase::SetVirtualSizeHints(int WXUNUSED(minW), int WXUNUSED(minH),
1047                                        int WXUNUSED(maxW), int WXUNUSED(maxH))
1048 {
1049 }
1050
1051 void wxWindowBase::SetVirtualSizeHints(const wxSize& WXUNUSED(minsize),
1052                                        const wxSize& WXUNUSED(maxsize))
1053 {
1054 }
1055 #endif // WXWIN_COMPATIBILITY_2_8
1056
1057 void wxWindowBase::DoSetVirtualSize( int x, int y )
1058 {
1059     m_virtualSize = wxSize(x, y);
1060 }
1061
1062 wxSize wxWindowBase::DoGetVirtualSize() const
1063 {
1064     // we should use the entire client area so if it is greater than our
1065     // virtual size, expand it to fit (otherwise if the window is big enough we
1066     // wouldn't be using parts of it)
1067     wxSize size = GetClientSize();
1068     if ( m_virtualSize.x > size.x )
1069         size.x = m_virtualSize.x;
1070
1071     if ( m_virtualSize.y >= size.y )
1072         size.y = m_virtualSize.y;
1073
1074     return size;
1075 }
1076
1077 void wxWindowBase::DoGetScreenPosition(int *x, int *y) const
1078 {
1079     // screen position is the same as (0, 0) in client coords for non TLWs (and
1080     // TLWs override this method)
1081     if ( x )
1082         *x = 0;
1083     if ( y )
1084         *y = 0;
1085
1086     ClientToScreen(x, y);
1087 }
1088
1089 void wxWindowBase::SendSizeEvent(int flags)
1090 {
1091     wxSizeEvent event(GetSize(), GetId());
1092     event.SetEventObject(this);
1093     if ( flags & wxSEND_EVENT_POST )
1094         wxPostEvent(GetEventHandler(), event);
1095     else
1096         HandleWindowEvent(event);
1097 }
1098
1099 void wxWindowBase::SendSizeEventToParent(int flags)
1100 {
1101     wxWindow * const parent = GetParent();
1102     if ( parent && !parent->IsBeingDeleted() )
1103         parent->SendSizeEvent(flags);
1104 }
1105
1106 bool wxWindowBase::HasScrollbar(int orient) const
1107 {
1108     // if scrolling in the given direction is disabled, we can't have the
1109     // corresponding scrollbar no matter what
1110     if ( !CanScroll(orient) )
1111         return false;
1112
1113     const wxSize sizeVirt = GetVirtualSize();
1114     const wxSize sizeClient = GetClientSize();
1115
1116     return orient == wxHORIZONTAL ? sizeVirt.x > sizeClient.x
1117                                   : sizeVirt.y > sizeClient.y;
1118 }
1119
1120 // ----------------------------------------------------------------------------
1121 // show/hide/enable/disable the window
1122 // ----------------------------------------------------------------------------
1123
1124 bool wxWindowBase::Show(bool show)
1125 {
1126     if ( show != m_isShown )
1127     {
1128         m_isShown = show;
1129
1130         return true;
1131     }
1132     else
1133     {
1134         return false;
1135     }
1136 }
1137
1138 bool wxWindowBase::IsEnabled() const
1139 {
1140     return IsThisEnabled() && (IsTopLevel() || !GetParent() || GetParent()->IsEnabled());
1141 }
1142
1143 void wxWindowBase::NotifyWindowOnEnableChange(bool enabled)
1144 {
1145     // Under some platforms there is no need to update the window state
1146     // explicitly, it will become disabled when its parent is. On other ones we
1147     // do need to disable all windows recursively though.
1148 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
1149     DoEnable(enabled);
1150 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
1151
1152     OnEnabled(enabled);
1153
1154     // Disabling a top level window is typically done when showing a modal
1155     // dialog and we don't need to disable its children in this case, they will
1156     // be logically disabled anyhow (i.e. their IsEnabled() will return false)
1157     // and the TLW won't accept any input for them. Moreover, explicitly
1158     // disabling them would look ugly as the entire TLW would be greyed out
1159     // whenever a modal dialog is shown and no native applications under any
1160     // platform behave like this.
1161     if ( IsTopLevel() && !enabled )
1162         return;
1163
1164     // When disabling (or enabling back) a non-TLW window we need to
1165     // recursively propagate the change of the state to its children, otherwise
1166     // they would still show as enabled even though they wouldn't actually
1167     // accept any input (at least under MSW where children don't accept input
1168     // if any of the windows in their parent chain is enabled).
1169     //
1170     // Notice that we must do this even for wxHAS_NATIVE_ENABLED_MANAGEMENT
1171     // platforms as we still need to call the children OnEnabled() recursively.
1172     for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
1173           node;
1174           node = node->GetNext() )
1175     {
1176         wxWindowBase * const child = node->GetData();
1177         if ( !child->IsTopLevel() && child->IsThisEnabled() )
1178             child->NotifyWindowOnEnableChange(enabled);
1179     }
1180 }
1181
1182 bool wxWindowBase::Enable(bool enable)
1183 {
1184     if ( enable == IsThisEnabled() )
1185         return false;
1186
1187     m_isEnabled = enable;
1188
1189     // If we call DoEnable() from NotifyWindowOnEnableChange(), we don't need
1190     // to do it from here.
1191 #ifdef wxHAS_NATIVE_ENABLED_MANAGEMENT
1192     DoEnable(enable);
1193 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
1194
1195     NotifyWindowOnEnableChange(enable);
1196
1197     return true;
1198 }
1199
1200 bool wxWindowBase::IsShownOnScreen() const
1201 {
1202     // A window is shown on screen if it itself is shown and so are all its
1203     // parents. But if a window is toplevel one, then its always visible on
1204     // screen if IsShown() returns true, even if it has a hidden parent.
1205     return IsShown() &&
1206            (IsTopLevel() || GetParent() == NULL || GetParent()->IsShownOnScreen());
1207 }
1208
1209 // ----------------------------------------------------------------------------
1210 // RTTI
1211 // ----------------------------------------------------------------------------
1212
1213 bool wxWindowBase::IsTopLevel() const
1214 {
1215     return false;
1216 }
1217
1218 // ----------------------------------------------------------------------------
1219 // Freeze/Thaw
1220 // ----------------------------------------------------------------------------
1221
1222 void wxWindowBase::Freeze()
1223 {
1224     if ( !m_freezeCount++ )
1225     {
1226         // physically freeze this window:
1227         DoFreeze();
1228
1229         // and recursively freeze all children:
1230         for ( wxWindowList::iterator i = GetChildren().begin();
1231               i != GetChildren().end(); ++i )
1232         {
1233             wxWindow *child = *i;
1234             if ( child->IsTopLevel() )
1235                 continue;
1236
1237             child->Freeze();
1238         }
1239     }
1240 }
1241
1242 void wxWindowBase::Thaw()
1243 {
1244     wxASSERT_MSG( m_freezeCount, "Thaw() without matching Freeze()" );
1245
1246     if ( !--m_freezeCount )
1247     {
1248         // recursively thaw all children:
1249         for ( wxWindowList::iterator i = GetChildren().begin();
1250               i != GetChildren().end(); ++i )
1251         {
1252             wxWindow *child = *i;
1253             if ( child->IsTopLevel() )
1254                 continue;
1255
1256             child->Thaw();
1257         }
1258
1259         // physically thaw this window:
1260         DoThaw();
1261     }
1262 }
1263
1264 // ----------------------------------------------------------------------------
1265 // Dealing with parents and children.
1266 // ----------------------------------------------------------------------------
1267
1268 bool wxWindowBase::IsDescendant(wxWindowBase* win) const
1269 {
1270     // Iterate until we find this window in the parent chain or exhaust it.
1271     while ( win )
1272     {
1273         if ( win == this )
1274             return true;
1275
1276         // Stop iterating on reaching the top level window boundary.
1277         if ( win->IsTopLevel() )
1278             break;
1279
1280         win = win->GetParent();
1281     }
1282
1283     return false;
1284 }
1285
1286 void wxWindowBase::AddChild(wxWindowBase *child)
1287 {
1288     wxCHECK_RET( child, wxT("can't add a NULL child") );
1289
1290     // this should never happen and it will lead to a crash later if it does
1291     // because RemoveChild() will remove only one node from the children list
1292     // and the other(s) one(s) will be left with dangling pointers in them
1293     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), wxT("AddChild() called twice") );
1294
1295     GetChildren().Append((wxWindow*)child);
1296     child->SetParent(this);
1297
1298     // adding a child while frozen will assert when thawed, so freeze it as if
1299     // it had been already present when we were frozen
1300     if ( IsFrozen() && !child->IsTopLevel() )
1301         child->Freeze();
1302 }
1303
1304 void wxWindowBase::RemoveChild(wxWindowBase *child)
1305 {
1306     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1307
1308     // removing a child while frozen may result in permanently frozen window
1309     // if used e.g. from Reparent(), so thaw it
1310     //
1311     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1312     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1313     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1314         child->Thaw();
1315
1316     GetChildren().DeleteObject((wxWindow *)child);
1317     child->SetParent(NULL);
1318 }
1319
1320 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1321 {
1322     wxWindow *oldParent = GetParent();
1323     if ( newParent == oldParent )
1324     {
1325         // nothing done
1326         return false;
1327     }
1328
1329     const bool oldEnabledState = IsEnabled();
1330
1331     // unlink this window from the existing parent.
1332     if ( oldParent )
1333     {
1334         oldParent->RemoveChild(this);
1335     }
1336     else
1337     {
1338         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1339     }
1340
1341     // add it to the new one
1342     if ( newParent )
1343     {
1344         newParent->AddChild(this);
1345     }
1346     else
1347     {
1348         wxTopLevelWindows.Append((wxWindow *)this);
1349     }
1350
1351     // We need to notify window (and its subwindows) if by changing the parent
1352     // we also change our enabled/disabled status.
1353     const bool newEnabledState = IsEnabled();
1354     if ( newEnabledState != oldEnabledState )
1355     {
1356         NotifyWindowOnEnableChange(newEnabledState);
1357     }
1358
1359     return true;
1360 }
1361
1362 // ----------------------------------------------------------------------------
1363 // event handler stuff
1364 // ----------------------------------------------------------------------------
1365
1366 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1367 {
1368     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1369
1370     m_eventHandler = handler;
1371 }
1372
1373 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1374 {
1375     // disable wxEvtHandler chain mechanism for wxWindows:
1376     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1377
1378     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1379 }
1380 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1381 {
1382     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1383     // handler of our stack when is destroyed will be Unlink()ed and thus
1384     // will call this function to update the pointer of this window...
1385
1386     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1387 }
1388
1389 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1390 {
1391     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1392
1393     // the new handler is going to be part of the wxWindow stack of event handlers:
1394     // it can't be part also of an event handler double-linked chain:
1395     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1396         "The handler being pushed in the wxWindow stack shouldn't be part of "
1397         "a wxEvtHandler chain; call Unlink() on it first");
1398
1399     wxEvtHandler *handlerOld = GetEventHandler();
1400     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1401
1402     // now use wxEvtHandler double-linked list to implement a stack:
1403     handlerToPush->SetNextHandler(handlerOld);
1404
1405     if (handlerOld != this)
1406         handlerOld->SetPreviousHandler(handlerToPush);
1407
1408     SetEventHandler(handlerToPush);
1409
1410 #if wxDEBUG_LEVEL
1411     // final checks of the operations done above:
1412     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1413         "the first handler of the wxWindow stack should "
1414         "have no previous handlers set" );
1415     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1416         "the first handler of the wxWindow stack should "
1417         "have non-NULL next handler" );
1418
1419     wxEvtHandler* pLast = handlerToPush;
1420     while ( pLast && pLast != this )
1421         pLast = pLast->GetNextHandler();
1422     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1423         "the last handler of the wxWindow stack should "
1424         "have this window as next handler" );
1425 #endif // wxDEBUG_LEVEL
1426 }
1427
1428 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1429 {
1430     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1431
1432     wxEvtHandler *firstHandler = GetEventHandler();
1433     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1434     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1435     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1436         "the first handler of the wxWindow stack should have no previous handlers set" );
1437
1438     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1439     wxCHECK_MSG( secondHandler != NULL, NULL,
1440         "the first handler of the wxWindow stack should have non-NULL next handler" );
1441
1442     firstHandler->SetNextHandler(NULL);
1443
1444     // It is harmless but useless to unset the previous handler of the window
1445     // itself as it's always NULL anyhow, so don't do this.
1446     if ( secondHandler != this )
1447         secondHandler->SetPreviousHandler(NULL);
1448
1449     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1450     SetEventHandler(secondHandler);
1451
1452     if ( deleteHandler )
1453     {
1454         wxDELETE(firstHandler);
1455     }
1456
1457     return firstHandler;
1458 }
1459
1460 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1461 {
1462     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1463     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1464
1465     if (handlerToRemove == GetEventHandler())
1466     {
1467         // removing the first event handler is equivalent to "popping" the stack
1468         PopEventHandler(false);
1469         return true;
1470     }
1471
1472     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1473     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1474     while ( handlerCur != this && handlerCur )
1475     {
1476         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1477
1478         if ( handlerCur == handlerToRemove )
1479         {
1480             handlerCur->Unlink();
1481
1482             wxASSERT_MSG( handlerCur != GetEventHandler(),
1483                         "the case Remove == Pop should was already handled" );
1484             return true;
1485         }
1486
1487         handlerCur = handlerNext;
1488     }
1489
1490     wxFAIL_MSG( wxT("where has the event handler gone?") );
1491
1492     return false;
1493 }
1494
1495 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1496 {
1497     // SafelyProcessEvent() will handle exceptions nicely
1498     return GetEventHandler()->SafelyProcessEvent(event);
1499 }
1500
1501 // ----------------------------------------------------------------------------
1502 // colours, fonts &c
1503 // ----------------------------------------------------------------------------
1504
1505 void wxWindowBase::InheritAttributes()
1506 {
1507     const wxWindowBase * const parent = GetParent();
1508     if ( !parent )
1509         return;
1510
1511     // we only inherit attributes which had been explicitly set for the parent
1512     // which ensures that this only happens if the user really wants it and
1513     // not by default which wouldn't make any sense in modern GUIs where the
1514     // controls don't all use the same fonts (nor colours)
1515     if ( parent->m_inheritFont && !m_hasFont )
1516         SetFont(parent->GetFont());
1517
1518     // in addition, there is a possibility to explicitly forbid inheriting
1519     // colours at each class level by overriding ShouldInheritColours()
1520     if ( ShouldInheritColours() )
1521     {
1522         if ( parent->m_inheritFgCol && !m_hasFgCol )
1523             SetForegroundColour(parent->GetForegroundColour());
1524
1525         // inheriting (solid) background colour is wrong as it totally breaks
1526         // any kind of themed backgrounds
1527         //
1528         // instead, the controls should use the same background as their parent
1529         // (ideally by not drawing it at all)
1530 #if 0
1531         if ( parent->m_inheritBgCol && !m_hasBgCol )
1532             SetBackgroundColour(parent->GetBackgroundColour());
1533 #endif // 0
1534     }
1535 }
1536
1537 /* static */ wxVisualAttributes
1538 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1539 {
1540     // it is important to return valid values for all attributes from here,
1541     // GetXXX() below rely on this
1542     wxVisualAttributes attrs;
1543     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1544     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1545
1546     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1547     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1548     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1549     // colour on other platforms.
1550
1551 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1552     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1553 #else
1554     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1555 #endif
1556     return attrs;
1557 }
1558
1559 wxColour wxWindowBase::GetBackgroundColour() const
1560 {
1561     if ( !m_backgroundColour.IsOk() )
1562     {
1563         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1564
1565         // get our default background colour
1566         wxColour colBg = GetDefaultAttributes().colBg;
1567
1568         // we must return some valid colour to avoid redoing this every time
1569         // and also to avoid surprising the applications written for older
1570         // wxWidgets versions where GetBackgroundColour() always returned
1571         // something -- so give them something even if it doesn't make sense
1572         // for this window (e.g. it has a themed background)
1573         if ( !colBg.IsOk() )
1574             colBg = GetClassDefaultAttributes().colBg;
1575
1576         return colBg;
1577     }
1578     else
1579         return m_backgroundColour;
1580 }
1581
1582 wxColour wxWindowBase::GetForegroundColour() const
1583 {
1584     // logic is the same as above
1585     if ( !m_hasFgCol && !m_foregroundColour.IsOk() )
1586     {
1587         wxColour colFg = GetDefaultAttributes().colFg;
1588
1589         if ( !colFg.IsOk() )
1590             colFg = GetClassDefaultAttributes().colFg;
1591
1592         return colFg;
1593     }
1594     else
1595         return m_foregroundColour;
1596 }
1597
1598 bool wxWindowBase::SetBackgroundStyle(wxBackgroundStyle style)
1599 {
1600     // The checks below shouldn't be triggered if we're not really changing the
1601     // style.
1602     if ( style == m_backgroundStyle )
1603         return true;
1604
1605     // Transparent background style can be only set before creation because of
1606     // wxGTK limitation.
1607     wxCHECK_MSG( (style != wxBG_STYLE_TRANSPARENT) || !GetHandle(),
1608                  false,
1609                  "wxBG_STYLE_TRANSPARENT style can only be set before "
1610                  "Create()-ing the window." );
1611
1612     // And once it is set, wxBG_STYLE_TRANSPARENT can't be unset.
1613     wxCHECK_MSG( (m_backgroundStyle != wxBG_STYLE_TRANSPARENT) ||
1614                  (style == wxBG_STYLE_TRANSPARENT),
1615                  false,
1616                  "wxBG_STYLE_TRANSPARENT can't be unset once it was set." );
1617
1618     m_backgroundStyle = style;
1619
1620     return true;
1621 }
1622
1623 bool wxWindowBase::IsTransparentBackgroundSupported(wxString *reason) const
1624 {
1625     if ( reason )
1626         *reason = _("This platform does not support background transparency.");
1627
1628     return false;
1629 }
1630
1631 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1632 {
1633     if ( colour == m_backgroundColour )
1634         return false;
1635
1636     m_hasBgCol = colour.IsOk();
1637
1638     m_inheritBgCol = m_hasBgCol;
1639     m_backgroundColour = colour;
1640     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.IsOk() );
1641     return true;
1642 }
1643
1644 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1645 {
1646     if (colour == m_foregroundColour )
1647         return false;
1648
1649     m_hasFgCol = colour.IsOk();
1650     m_inheritFgCol = m_hasFgCol;
1651     m_foregroundColour = colour;
1652     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.IsOk() );
1653     return true;
1654 }
1655
1656 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1657 {
1658     // setting an invalid cursor is ok, it means that we don't have any special
1659     // cursor
1660     if ( m_cursor.IsSameAs(cursor) )
1661     {
1662         // no change
1663         return false;
1664     }
1665
1666     m_cursor = cursor;
1667
1668     return true;
1669 }
1670
1671 wxFont wxWindowBase::GetFont() const
1672 {
1673     // logic is the same as in GetBackgroundColour()
1674     if ( !m_font.IsOk() )
1675     {
1676         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1677
1678         wxFont font = GetDefaultAttributes().font;
1679         if ( !font.IsOk() )
1680             font = GetClassDefaultAttributes().font;
1681
1682         return font;
1683     }
1684     else
1685         return m_font;
1686 }
1687
1688 bool wxWindowBase::SetFont(const wxFont& font)
1689 {
1690     if ( font == m_font )
1691     {
1692         // no change
1693         return false;
1694     }
1695
1696     m_font = font;
1697     m_hasFont = font.IsOk();
1698     m_inheritFont = m_hasFont;
1699
1700     InvalidateBestSize();
1701
1702     return true;
1703 }
1704
1705 #if wxUSE_PALETTE
1706
1707 void wxWindowBase::SetPalette(const wxPalette& pal)
1708 {
1709     m_hasCustomPalette = true;
1710     m_palette = pal;
1711
1712     // VZ: can anyone explain me what do we do here?
1713     wxWindowDC d((wxWindow *) this);
1714     d.SetPalette(pal);
1715 }
1716
1717 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1718 {
1719     wxWindow *win = (wxWindow *)this;
1720     while ( win && !win->HasCustomPalette() )
1721     {
1722         win = win->GetParent();
1723     }
1724
1725     return win;
1726 }
1727
1728 #endif // wxUSE_PALETTE
1729
1730 #if wxUSE_CARET
1731 void wxWindowBase::SetCaret(wxCaret *caret)
1732 {
1733     if ( m_caret )
1734     {
1735         delete m_caret;
1736     }
1737
1738     m_caret = caret;
1739
1740     if ( m_caret )
1741     {
1742         wxASSERT_MSG( m_caret->GetWindow() == this,
1743                       wxT("caret should be created associated to this window") );
1744     }
1745 }
1746 #endif // wxUSE_CARET
1747
1748 #if wxUSE_VALIDATORS
1749 // ----------------------------------------------------------------------------
1750 // validators
1751 // ----------------------------------------------------------------------------
1752
1753 void wxWindowBase::SetValidator(const wxValidator& validator)
1754 {
1755     if ( m_windowValidator )
1756         delete m_windowValidator;
1757
1758     m_windowValidator = (wxValidator *)validator.Clone();
1759
1760     if ( m_windowValidator )
1761         m_windowValidator->SetWindow(this);
1762 }
1763 #endif // wxUSE_VALIDATORS
1764
1765 // ----------------------------------------------------------------------------
1766 // update region stuff
1767 // ----------------------------------------------------------------------------
1768
1769 wxRect wxWindowBase::GetUpdateClientRect() const
1770 {
1771     wxRegion rgnUpdate = GetUpdateRegion();
1772     rgnUpdate.Intersect(GetClientRect());
1773     wxRect rectUpdate = rgnUpdate.GetBox();
1774     wxPoint ptOrigin = GetClientAreaOrigin();
1775     rectUpdate.x -= ptOrigin.x;
1776     rectUpdate.y -= ptOrigin.y;
1777
1778     return rectUpdate;
1779 }
1780
1781 bool wxWindowBase::DoIsExposed(int x, int y) const
1782 {
1783     return m_updateRegion.Contains(x, y) != wxOutRegion;
1784 }
1785
1786 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1787 {
1788     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1789 }
1790
1791 void wxWindowBase::ClearBackground()
1792 {
1793     // wxGTK uses its own version, no need to add never used code
1794 #ifndef __WXGTK__
1795     wxClientDC dc((wxWindow *)this);
1796     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1797     dc.SetBackground(brush);
1798     dc.Clear();
1799 #endif // __WXGTK__
1800 }
1801
1802 // ----------------------------------------------------------------------------
1803 // find child window by id or name
1804 // ----------------------------------------------------------------------------
1805
1806 wxWindow *wxWindowBase::FindWindow(long id) const
1807 {
1808     if ( id == m_windowId )
1809         return (wxWindow *)this;
1810
1811     wxWindowBase *res = NULL;
1812     wxWindowList::compatibility_iterator node;
1813     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1814     {
1815         wxWindowBase *child = node->GetData();
1816         res = child->FindWindow( id );
1817     }
1818
1819     return (wxWindow *)res;
1820 }
1821
1822 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1823 {
1824     if ( name == m_windowName )
1825         return (wxWindow *)this;
1826
1827     wxWindowBase *res = NULL;
1828     wxWindowList::compatibility_iterator node;
1829     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1830     {
1831         wxWindow *child = node->GetData();
1832         res = child->FindWindow(name);
1833     }
1834
1835     return (wxWindow *)res;
1836 }
1837
1838
1839 // find any window by id or name or label: If parent is non-NULL, look through
1840 // children for a label or title matching the specified string. If NULL, look
1841 // through all top-level windows.
1842 //
1843 // to avoid duplicating code we reuse the same helper function but with
1844 // different comparators
1845
1846 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1847                                 const wxString& label, long id);
1848
1849 static
1850 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1851                            long WXUNUSED(id))
1852 {
1853     return win->GetLabel() == label;
1854 }
1855
1856 static
1857 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1858                           long WXUNUSED(id))
1859 {
1860     return win->GetName() == label;
1861 }
1862
1863 static
1864 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1865                         long id)
1866 {
1867     return win->GetId() == id;
1868 }
1869
1870 // recursive helper for the FindWindowByXXX() functions
1871 static
1872 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1873                                   const wxString& label,
1874                                   long id,
1875                                   wxFindWindowCmp cmp)
1876 {
1877     if ( parent )
1878     {
1879         // see if this is the one we're looking for
1880         if ( (*cmp)(parent, label, id) )
1881             return (wxWindow *)parent;
1882
1883         // It wasn't, so check all its children
1884         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1885               node;
1886               node = node->GetNext() )
1887         {
1888             // recursively check each child
1889             wxWindow *win = (wxWindow *)node->GetData();
1890             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1891             if (retwin)
1892                 return retwin;
1893         }
1894     }
1895
1896     // Not found
1897     return NULL;
1898 }
1899
1900 // helper for FindWindowByXXX()
1901 static
1902 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1903                              const wxString& label,
1904                              long id,
1905                              wxFindWindowCmp cmp)
1906 {
1907     if ( parent )
1908     {
1909         // just check parent and all its children
1910         return wxFindWindowRecursively(parent, label, id, cmp);
1911     }
1912
1913     // start at very top of wx's windows
1914     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1915           node;
1916           node = node->GetNext() )
1917     {
1918         // recursively check each window & its children
1919         wxWindow *win = node->GetData();
1920         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1921         if (retwin)
1922             return retwin;
1923     }
1924
1925     return NULL;
1926 }
1927
1928 /* static */
1929 wxWindow *
1930 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1931 {
1932     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1933 }
1934
1935 /* static */
1936 wxWindow *
1937 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1938 {
1939     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1940
1941     if ( !win )
1942     {
1943         // fall back to the label
1944         win = FindWindowByLabel(title, parent);
1945     }
1946
1947     return win;
1948 }
1949
1950 /* static */
1951 wxWindow *
1952 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1953 {
1954     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1955 }
1956
1957 // ----------------------------------------------------------------------------
1958 // dialog oriented functions
1959 // ----------------------------------------------------------------------------
1960
1961 #if WXWIN_COMPATIBILITY_2_8
1962 void wxWindowBase::MakeModal(bool modal)
1963 {
1964     // Disable all other windows
1965     if ( IsTopLevel() )
1966     {
1967         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1968         while (node)
1969         {
1970             wxWindow *win = node->GetData();
1971             if (win != this)
1972                 win->Enable(!modal);
1973
1974             node = node->GetNext();
1975         }
1976     }
1977 }
1978 #endif // WXWIN_COMPATIBILITY_2_8
1979
1980 bool wxWindowBase::Validate()
1981 {
1982 #if wxUSE_VALIDATORS
1983     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1984
1985     wxWindowList::compatibility_iterator node;
1986     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1987     {
1988         wxWindowBase *child = node->GetData();
1989         wxValidator *validator = child->GetValidator();
1990         if ( validator && !validator->Validate((wxWindow *)this) )
1991         {
1992             return false;
1993         }
1994
1995         if ( recurse && !child->Validate() )
1996         {
1997             return false;
1998         }
1999     }
2000 #endif // wxUSE_VALIDATORS
2001
2002     return true;
2003 }
2004
2005 bool wxWindowBase::TransferDataToWindow()
2006 {
2007 #if wxUSE_VALIDATORS
2008     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
2009
2010     wxWindowList::compatibility_iterator node;
2011     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
2012     {
2013         wxWindowBase *child = node->GetData();
2014         wxValidator *validator = child->GetValidator();
2015         if ( validator && !validator->TransferToWindow() )
2016         {
2017             wxLogWarning(_("Could not transfer data to window"));
2018 #if wxUSE_LOG
2019             wxLog::FlushActive();
2020 #endif // wxUSE_LOG
2021
2022             return false;
2023         }
2024
2025         if ( recurse )
2026         {
2027             if ( !child->TransferDataToWindow() )
2028             {
2029                 // warning already given
2030                 return false;
2031             }
2032         }
2033     }
2034 #endif // wxUSE_VALIDATORS
2035
2036     return true;
2037 }
2038
2039 bool wxWindowBase::TransferDataFromWindow()
2040 {
2041 #if wxUSE_VALIDATORS
2042     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
2043
2044     wxWindowList::compatibility_iterator node;
2045     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
2046     {
2047         wxWindow *child = node->GetData();
2048         wxValidator *validator = child->GetValidator();
2049         if ( validator && !validator->TransferFromWindow() )
2050         {
2051             // nop warning here because the application is supposed to give
2052             // one itself - we don't know here what might have gone wrongly
2053
2054             return false;
2055         }
2056
2057         if ( recurse )
2058         {
2059             if ( !child->TransferDataFromWindow() )
2060             {
2061                 // warning already given
2062                 return false;
2063             }
2064         }
2065     }
2066 #endif // wxUSE_VALIDATORS
2067
2068     return true;
2069 }
2070
2071 void wxWindowBase::InitDialog()
2072 {
2073     wxInitDialogEvent event(GetId());
2074     event.SetEventObject( this );
2075     GetEventHandler()->ProcessEvent(event);
2076 }
2077
2078 // ----------------------------------------------------------------------------
2079 // context-sensitive help support
2080 // ----------------------------------------------------------------------------
2081
2082 #if wxUSE_HELP
2083
2084 // associate this help text with this window
2085 void wxWindowBase::SetHelpText(const wxString& text)
2086 {
2087     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2088     if ( helpProvider )
2089     {
2090         helpProvider->AddHelp(this, text);
2091     }
2092 }
2093
2094 #if WXWIN_COMPATIBILITY_2_8
2095 // associate this help text with all windows with the same id as this
2096 // one
2097 void wxWindowBase::SetHelpTextForId(const wxString& text)
2098 {
2099     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2100     if ( helpProvider )
2101     {
2102         helpProvider->AddHelp(GetId(), text);
2103     }
2104 }
2105 #endif // WXWIN_COMPATIBILITY_2_8
2106
2107 // get the help string associated with this window (may be empty)
2108 // default implementation forwards calls to the help provider
2109 wxString
2110 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
2111                                  wxHelpEvent::Origin WXUNUSED(origin)) const
2112 {
2113     wxString text;
2114     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2115     if ( helpProvider )
2116     {
2117         text = helpProvider->GetHelp(this);
2118     }
2119
2120     return text;
2121 }
2122
2123 // show help for this window
2124 void wxWindowBase::OnHelp(wxHelpEvent& event)
2125 {
2126     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2127     if ( helpProvider )
2128     {
2129         wxPoint pos = event.GetPosition();
2130         const wxHelpEvent::Origin origin = event.GetOrigin();
2131         if ( origin == wxHelpEvent::Origin_Keyboard )
2132         {
2133             // if the help event was generated from keyboard it shouldn't
2134             // appear at the mouse position (which is still the only position
2135             // associated with help event) if the mouse is far away, although
2136             // we still do use the mouse position if it's over the window
2137             // because we suppose the user looks approximately at the mouse
2138             // already and so it would be more convenient than showing tooltip
2139             // at some arbitrary position which can be quite far from it
2140             const wxRect rectClient = GetClientRect();
2141             if ( !rectClient.Contains(ScreenToClient(pos)) )
2142             {
2143                 // position help slightly under and to the right of this window
2144                 pos = ClientToScreen(wxPoint(
2145                         2*GetCharWidth(),
2146                         rectClient.height + GetCharHeight()
2147                       ));
2148             }
2149         }
2150
2151         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
2152         {
2153             // skip the event.Skip() below
2154             return;
2155         }
2156     }
2157
2158     event.Skip();
2159 }
2160
2161 #endif // wxUSE_HELP
2162
2163 // ----------------------------------------------------------------------------
2164 // tooltips
2165 // ----------------------------------------------------------------------------
2166
2167 #if wxUSE_TOOLTIPS
2168
2169 wxString wxWindowBase::GetToolTipText() const
2170 {
2171     return m_tooltip ? m_tooltip->GetTip() : wxString();
2172 }
2173
2174 void wxWindowBase::SetToolTip( const wxString &tip )
2175 {
2176     // don't create the new tooltip if we already have one
2177     if ( m_tooltip )
2178     {
2179         m_tooltip->SetTip( tip );
2180     }
2181     else
2182     {
2183         SetToolTip( new wxToolTip( tip ) );
2184     }
2185
2186     // setting empty tooltip text does not remove the tooltip any more - use
2187     // SetToolTip(NULL) for this
2188 }
2189
2190 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
2191 {
2192     if ( m_tooltip != tooltip )
2193     {
2194         if ( m_tooltip )
2195             delete m_tooltip;
2196
2197         m_tooltip = tooltip;
2198     }
2199 }
2200
2201 bool wxWindowBase::CopyToolTip(wxToolTip *tip)
2202 {
2203     SetToolTip(tip ? new wxToolTip(tip->GetTip()) : NULL);
2204
2205     return tip != NULL;
2206 }
2207
2208 #endif // wxUSE_TOOLTIPS
2209
2210 // ----------------------------------------------------------------------------
2211 // constraints and sizers
2212 // ----------------------------------------------------------------------------
2213
2214 #if wxUSE_CONSTRAINTS
2215
2216 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
2217 {
2218     if ( m_constraints )
2219     {
2220         UnsetConstraints(m_constraints);
2221         delete m_constraints;
2222     }
2223     m_constraints = constraints;
2224     if ( m_constraints )
2225     {
2226         // Make sure other windows know they're part of a 'meaningful relationship'
2227         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
2228             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
2229         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
2230             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
2231         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
2232             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
2233         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
2234             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
2235         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
2236             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
2237         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
2238             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
2239         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
2240             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
2241         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
2242             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
2243     }
2244 }
2245
2246 // This removes any dangling pointers to this window in other windows'
2247 // constraintsInvolvedIn lists.
2248 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
2249 {
2250     if ( c )
2251     {
2252         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2253             c->left.GetOtherWindow()->RemoveConstraintReference(this);
2254         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2255             c->top.GetOtherWindow()->RemoveConstraintReference(this);
2256         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
2257             c->right.GetOtherWindow()->RemoveConstraintReference(this);
2258         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
2259             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
2260         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
2261             c->width.GetOtherWindow()->RemoveConstraintReference(this);
2262         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
2263             c->height.GetOtherWindow()->RemoveConstraintReference(this);
2264         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
2265             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
2266         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
2267             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
2268     }
2269 }
2270
2271 // Back-pointer to other windows we're involved with, so if we delete this
2272 // window, we must delete any constraints we're involved with.
2273 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
2274 {
2275     if ( !m_constraintsInvolvedIn )
2276         m_constraintsInvolvedIn = new wxWindowList;
2277     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
2278         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
2279 }
2280
2281 // REMOVE back-pointer to other windows we're involved with.
2282 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
2283 {
2284     if ( m_constraintsInvolvedIn )
2285         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
2286 }
2287
2288 // Reset any constraints that mention this window
2289 void wxWindowBase::DeleteRelatedConstraints()
2290 {
2291     if ( m_constraintsInvolvedIn )
2292     {
2293         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
2294         while (node)
2295         {
2296             wxWindow *win = node->GetData();
2297             wxLayoutConstraints *constr = win->GetConstraints();
2298
2299             // Reset any constraints involving this window
2300             if ( constr )
2301             {
2302                 constr->left.ResetIfWin(this);
2303                 constr->top.ResetIfWin(this);
2304                 constr->right.ResetIfWin(this);
2305                 constr->bottom.ResetIfWin(this);
2306                 constr->width.ResetIfWin(this);
2307                 constr->height.ResetIfWin(this);
2308                 constr->centreX.ResetIfWin(this);
2309                 constr->centreY.ResetIfWin(this);
2310             }
2311
2312             wxWindowList::compatibility_iterator next = node->GetNext();
2313             m_constraintsInvolvedIn->Erase(node);
2314             node = next;
2315         }
2316
2317         wxDELETE(m_constraintsInvolvedIn);
2318     }
2319 }
2320
2321 #endif // wxUSE_CONSTRAINTS
2322
2323 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2324 {
2325     if ( sizer == m_windowSizer)
2326         return;
2327
2328     if ( m_windowSizer )
2329     {
2330         m_windowSizer->SetContainingWindow(NULL);
2331
2332         if ( deleteOld )
2333             delete m_windowSizer;
2334     }
2335
2336     m_windowSizer = sizer;
2337     if ( m_windowSizer )
2338     {
2339         m_windowSizer->SetContainingWindow((wxWindow *)this);
2340     }
2341
2342     SetAutoLayout(m_windowSizer != NULL);
2343 }
2344
2345 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2346 {
2347     SetSizer( sizer, deleteOld );
2348     sizer->SetSizeHints( (wxWindow*) this );
2349 }
2350
2351
2352 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2353 {
2354     // adding a window to a sizer twice is going to result in fatal and
2355     // hard to debug problems later because when deleting the second
2356     // associated wxSizerItem we're going to dereference a dangling
2357     // pointer; so try to detect this as early as possible
2358     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2359                   wxT("Adding a window to the same sizer twice?") );
2360
2361     m_containingSizer = sizer;
2362 }
2363
2364 #if wxUSE_CONSTRAINTS
2365
2366 void wxWindowBase::SatisfyConstraints()
2367 {
2368     wxLayoutConstraints *constr = GetConstraints();
2369     bool wasOk = constr && constr->AreSatisfied();
2370
2371     ResetConstraints();   // Mark all constraints as unevaluated
2372
2373     int noChanges = 1;
2374
2375     // if we're a top level panel (i.e. our parent is frame/dialog), our
2376     // own constraints will never be satisfied any more unless we do it
2377     // here
2378     if ( wasOk )
2379     {
2380         while ( noChanges > 0 )
2381         {
2382             LayoutPhase1(&noChanges);
2383         }
2384     }
2385
2386     LayoutPhase2(&noChanges);
2387 }
2388
2389 #endif // wxUSE_CONSTRAINTS
2390
2391 bool wxWindowBase::Layout()
2392 {
2393     // If there is a sizer, use it instead of the constraints
2394     if ( GetSizer() )
2395     {
2396         int w = 0, h = 0;
2397         GetVirtualSize(&w, &h);
2398         GetSizer()->SetDimension( 0, 0, w, h );
2399     }
2400 #if wxUSE_CONSTRAINTS
2401     else
2402     {
2403         SatisfyConstraints(); // Find the right constraints values
2404         SetConstraintSizes(); // Recursively set the real window sizes
2405     }
2406 #endif
2407
2408     return true;
2409 }
2410
2411 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2412 {
2413     if ( GetAutoLayout() )
2414         Layout();
2415
2416     event.Skip();
2417 }
2418
2419 #if wxUSE_CONSTRAINTS
2420
2421 // first phase of the constraints evaluation: set our own constraints
2422 bool wxWindowBase::LayoutPhase1(int *noChanges)
2423 {
2424     wxLayoutConstraints *constr = GetConstraints();
2425
2426     return !constr || constr->SatisfyConstraints(this, noChanges);
2427 }
2428
2429 // second phase: set the constraints for our children
2430 bool wxWindowBase::LayoutPhase2(int *noChanges)
2431 {
2432     *noChanges = 0;
2433
2434     // Layout children
2435     DoPhase(1);
2436
2437     // Layout grand children
2438     DoPhase(2);
2439
2440     return true;
2441 }
2442
2443 // Do a phase of evaluating child constraints
2444 bool wxWindowBase::DoPhase(int phase)
2445 {
2446     // the list containing the children for which the constraints are already
2447     // set correctly
2448     wxWindowList succeeded;
2449
2450     // the max number of iterations we loop before concluding that we can't set
2451     // the constraints
2452     static const int maxIterations = 500;
2453
2454     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2455     {
2456         int noChanges = 0;
2457
2458         // loop over all children setting their constraints
2459         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2460               node;
2461               node = node->GetNext() )
2462         {
2463             wxWindow *child = node->GetData();
2464             if ( child->IsTopLevel() )
2465             {
2466                 // top level children are not inside our client area
2467                 continue;
2468             }
2469
2470             if ( !child->GetConstraints() || succeeded.Find(child) )
2471             {
2472                 // this one is either already ok or nothing we can do about it
2473                 continue;
2474             }
2475
2476             int tempNoChanges = 0;
2477             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2478                                       : child->LayoutPhase2(&tempNoChanges);
2479             noChanges += tempNoChanges;
2480
2481             if ( success )
2482             {
2483                 succeeded.Append(child);
2484             }
2485         }
2486
2487         if ( !noChanges )
2488         {
2489             // constraints are set
2490             break;
2491         }
2492     }
2493
2494     return true;
2495 }
2496
2497 void wxWindowBase::ResetConstraints()
2498 {
2499     wxLayoutConstraints *constr = GetConstraints();
2500     if ( constr )
2501     {
2502         constr->left.SetDone(false);
2503         constr->top.SetDone(false);
2504         constr->right.SetDone(false);
2505         constr->bottom.SetDone(false);
2506         constr->width.SetDone(false);
2507         constr->height.SetDone(false);
2508         constr->centreX.SetDone(false);
2509         constr->centreY.SetDone(false);
2510     }
2511
2512     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2513     while (node)
2514     {
2515         wxWindow *win = node->GetData();
2516         if ( !win->IsTopLevel() )
2517             win->ResetConstraints();
2518         node = node->GetNext();
2519     }
2520 }
2521
2522 // Need to distinguish between setting the 'fake' size for windows and sizers,
2523 // and setting the real values.
2524 void wxWindowBase::SetConstraintSizes(bool recurse)
2525 {
2526     wxLayoutConstraints *constr = GetConstraints();
2527     if ( constr && constr->AreSatisfied() )
2528     {
2529         int x = constr->left.GetValue();
2530         int y = constr->top.GetValue();
2531         int w = constr->width.GetValue();
2532         int h = constr->height.GetValue();
2533
2534         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2535              (constr->height.GetRelationship() != wxAsIs) )
2536         {
2537             // We really shouldn't set negative sizes for the windows so make
2538             // them at least of 1*1 size
2539             SetSize(x, y, w > 0 ? w : 1, h > 0 ? h : 1);
2540         }
2541         else
2542         {
2543             // If we don't want to resize this window, just move it...
2544             Move(x, y);
2545         }
2546     }
2547     else if ( constr )
2548     {
2549         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2550                    GetClassInfo()->GetClassName(),
2551                    GetName().c_str());
2552     }
2553
2554     if ( recurse )
2555     {
2556         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2557         while (node)
2558         {
2559             wxWindow *win = node->GetData();
2560             if ( !win->IsTopLevel() && win->GetConstraints() )
2561                 win->SetConstraintSizes();
2562             node = node->GetNext();
2563         }
2564     }
2565 }
2566
2567 // Only set the size/position of the constraint (if any)
2568 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2569 {
2570     wxLayoutConstraints *constr = GetConstraints();
2571     if ( constr )
2572     {
2573         if ( x != wxDefaultCoord )
2574         {
2575             constr->left.SetValue(x);
2576             constr->left.SetDone(true);
2577         }
2578         if ( y != wxDefaultCoord )
2579         {
2580             constr->top.SetValue(y);
2581             constr->top.SetDone(true);
2582         }
2583         if ( w != wxDefaultCoord )
2584         {
2585             constr->width.SetValue(w);
2586             constr->width.SetDone(true);
2587         }
2588         if ( h != wxDefaultCoord )
2589         {
2590             constr->height.SetValue(h);
2591             constr->height.SetDone(true);
2592         }
2593     }
2594 }
2595
2596 void wxWindowBase::MoveConstraint(int x, int y)
2597 {
2598     wxLayoutConstraints *constr = GetConstraints();
2599     if ( constr )
2600     {
2601         if ( x != wxDefaultCoord )
2602         {
2603             constr->left.SetValue(x);
2604             constr->left.SetDone(true);
2605         }
2606         if ( y != wxDefaultCoord )
2607         {
2608             constr->top.SetValue(y);
2609             constr->top.SetDone(true);
2610         }
2611     }
2612 }
2613
2614 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2615 {
2616     wxLayoutConstraints *constr = GetConstraints();
2617     if ( constr )
2618     {
2619         *w = constr->width.GetValue();
2620         *h = constr->height.GetValue();
2621     }
2622     else
2623         GetSize(w, h);
2624 }
2625
2626 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2627 {
2628     wxLayoutConstraints *constr = GetConstraints();
2629     if ( constr )
2630     {
2631         *w = constr->width.GetValue();
2632         *h = constr->height.GetValue();
2633     }
2634     else
2635         GetClientSize(w, h);
2636 }
2637
2638 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2639 {
2640     wxLayoutConstraints *constr = GetConstraints();
2641     if ( constr )
2642     {
2643         *x = constr->left.GetValue();
2644         *y = constr->top.GetValue();
2645     }
2646     else
2647         GetPosition(x, y);
2648 }
2649
2650 #endif // wxUSE_CONSTRAINTS
2651
2652 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2653 {
2654     wxWindow *parent = GetParent();
2655     if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2656     {
2657         wxPoint pt(parent->GetClientAreaOrigin());
2658         x += pt.x;
2659         y += pt.y;
2660     }
2661 }
2662
2663 // ----------------------------------------------------------------------------
2664 // Update UI processing
2665 // ----------------------------------------------------------------------------
2666
2667 void wxWindowBase::UpdateWindowUI(long flags)
2668 {
2669     wxUpdateUIEvent event(GetId());
2670     event.SetEventObject(this);
2671
2672     if ( GetEventHandler()->ProcessEvent(event) )
2673     {
2674         DoUpdateWindowUI(event);
2675     }
2676
2677     if (flags & wxUPDATE_UI_RECURSE)
2678     {
2679         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2680         while (node)
2681         {
2682             wxWindow* child = (wxWindow*) node->GetData();
2683             child->UpdateWindowUI(flags);
2684             node = node->GetNext();
2685         }
2686     }
2687 }
2688
2689 // do the window-specific processing after processing the update event
2690 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2691 {
2692     if ( event.GetSetEnabled() )
2693         Enable(event.GetEnabled());
2694
2695     if ( event.GetSetShown() )
2696         Show(event.GetShown());
2697 }
2698
2699 // ----------------------------------------------------------------------------
2700 // Idle processing
2701 // ----------------------------------------------------------------------------
2702
2703 // Send idle event to window and all subwindows
2704 bool wxWindowBase::SendIdleEvents(wxIdleEvent& event)
2705 {
2706     bool needMore = false;
2707
2708     OnInternalIdle();
2709
2710     // should we send idle event to this window?
2711     if (wxIdleEvent::GetMode() == wxIDLE_PROCESS_ALL ||
2712         HasExtraStyle(wxWS_EX_PROCESS_IDLE))
2713     {
2714         event.SetEventObject(this);
2715         HandleWindowEvent(event);
2716
2717         if (event.MoreRequested())
2718             needMore = true;
2719     }
2720     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2721     for (; node; node = node->GetNext())
2722     {
2723         wxWindow* child = node->GetData();
2724         if (child->SendIdleEvents(event))
2725             needMore = true;
2726     }
2727
2728     return needMore;
2729 }
2730
2731 void wxWindowBase::OnInternalIdle()
2732 {
2733     if ( wxUpdateUIEvent::CanUpdate(this) )
2734         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
2735 }
2736
2737 // ----------------------------------------------------------------------------
2738 // dialog units translations
2739 // ----------------------------------------------------------------------------
2740
2741 // Windows' computes dialog units using average character width over upper-
2742 // and lower-case ASCII alphabet and not using the average character width
2743 // metadata stored in the font; see
2744 // http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion.
2745 // It's important that we perform the conversion in identical way, because
2746 // dialog units natively exist only on Windows and Windows HIG is expressed
2747 // using them.
2748 wxSize wxWindowBase::GetDlgUnitBase() const
2749 {
2750     const wxWindowBase * const parent = wxGetTopLevelParent((wxWindow*)this);
2751
2752     wxCHECK_MSG( parent, wxDefaultSize, wxS("Must have TLW parent") );
2753
2754     if ( !parent->m_font.IsOk() )
2755     {
2756         // Default GUI font is used. This is the most common case, so
2757         // cache the results.
2758         static wxSize s_defFontSize;
2759         if ( s_defFontSize.x == 0 )
2760             s_defFontSize = wxPrivate::GetAverageASCIILetterSize(*parent);
2761         return s_defFontSize;
2762     }
2763     else
2764     {
2765         // Custom font, we always need to compute the result
2766         return wxPrivate::GetAverageASCIILetterSize(*parent);
2767     }
2768 }
2769
2770 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt) const
2771 {
2772     const wxSize base = GetDlgUnitBase();
2773
2774     // NB: wxMulDivInt32() is used, because it correctly rounds the result
2775
2776     wxPoint pt2 = wxDefaultPosition;
2777     if (pt.x != wxDefaultCoord)
2778         pt2.x = wxMulDivInt32(pt.x, 4, base.x);
2779     if (pt.y != wxDefaultCoord)
2780         pt2.y = wxMulDivInt32(pt.y, 8, base.y);
2781
2782     return pt2;
2783 }
2784
2785 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt) const
2786 {
2787     const wxSize base = GetDlgUnitBase();
2788
2789     wxPoint pt2 = wxDefaultPosition;
2790     if (pt.x != wxDefaultCoord)
2791         pt2.x = wxMulDivInt32(pt.x, base.x, 4);
2792     if (pt.y != wxDefaultCoord)
2793         pt2.y = wxMulDivInt32(pt.y, base.y, 8);
2794
2795     return pt2;
2796 }
2797
2798 // ----------------------------------------------------------------------------
2799 // event handlers
2800 // ----------------------------------------------------------------------------
2801
2802 // propagate the colour change event to the subwindows
2803 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
2804 {
2805     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2806     while ( node )
2807     {
2808         // Only propagate to non-top-level windows
2809         wxWindow *win = node->GetData();
2810         if ( !win->IsTopLevel() )
2811         {
2812             wxSysColourChangedEvent event2;
2813             event2.SetEventObject(win);
2814             win->GetEventHandler()->ProcessEvent(event2);
2815         }
2816
2817         node = node->GetNext();
2818     }
2819
2820     Refresh();
2821 }
2822
2823 // the default action is to populate dialog with data when it's created,
2824 // and nudge the UI into displaying itself correctly in case
2825 // we've turned the wxUpdateUIEvents frequency down low.
2826 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2827 {
2828     TransferDataToWindow();
2829
2830     // Update the UI at this point
2831     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2832 }
2833
2834 // ----------------------------------------------------------------------------
2835 // menu-related functions
2836 // ----------------------------------------------------------------------------
2837
2838 #if wxUSE_MENUS
2839
2840 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2841 {
2842     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2843
2844     wxMenuInvokingWindowSetter
2845         setInvokingWin(*menu, static_cast<wxWindow *>(this));
2846
2847     wxCurrentPopupMenu = menu;
2848     const bool rc = DoPopupMenu(menu, x, y);
2849     wxCurrentPopupMenu = NULL;
2850
2851     return rc;
2852 }
2853
2854 // this is used to pass the id of the selected item from the menu event handler
2855 // to the main function itself
2856 //
2857 // it's ok to use a global here as there can be at most one popup menu shown at
2858 // any time
2859 static int gs_popupMenuSelection = wxID_NONE;
2860
2861 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2862 {
2863     // store the id in a global variable where we'll retrieve it from later
2864     gs_popupMenuSelection = event.GetId();
2865 }
2866
2867 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2868 {
2869     // nothing to do but do not skip it
2870 }
2871
2872 int
2873 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2874 {
2875     gs_popupMenuSelection = wxID_NONE;
2876
2877     Connect(wxEVT_COMMAND_MENU_SELECTED,
2878             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2879             NULL,
2880             this);
2881
2882     // it is common to construct the menu passed to this function dynamically
2883     // using some fixed range of ids which could clash with the ids used
2884     // elsewhere in the program, which could result in some menu items being
2885     // unintentionally disabled or otherwise modified by update UI handlers
2886     // elsewhere in the program code and this is difficult to avoid in the
2887     // program itself, so instead we just temporarily suspend UI updating while
2888     // this menu is shown
2889     Connect(wxEVT_UPDATE_UI,
2890             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2891             NULL,
2892             this);
2893
2894     PopupMenu(&menu, x, y);
2895
2896     Disconnect(wxEVT_UPDATE_UI,
2897                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2898                NULL,
2899                this);
2900     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2901                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2902                NULL,
2903                this);
2904
2905     return gs_popupMenuSelection;
2906 }
2907
2908 #endif // wxUSE_MENUS
2909
2910 // methods for drawing the sizers in a visible way: this is currently only
2911 // enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
2912 // that well and also because we don't want to leave it enabled in default
2913 // builds used for production
2914 #if wxDEBUG_LEVEL > 1
2915
2916 static void DrawSizers(wxWindowBase *win);
2917
2918 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2919 {
2920     wxClientDC dc((wxWindow *)win);
2921     dc.SetPen(*pen);
2922     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2923                        *wxTRANSPARENT_BRUSH);
2924     dc.DrawRectangle(rect.Deflate(1, 1));
2925 }
2926
2927 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2928 {
2929     const wxSizerItemList& items = sizer->GetChildren();
2930     for ( wxSizerItemList::const_iterator i = items.begin(),
2931                                         end = items.end();
2932           i != end;
2933           ++i )
2934     {
2935         wxSizerItem *item = *i;
2936         if ( item->IsSizer() )
2937         {
2938             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2939             DrawSizer(win, item->GetSizer());
2940         }
2941         else if ( item->IsSpacer() )
2942         {
2943             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2944         }
2945         else if ( item->IsWindow() )
2946         {
2947             DrawSizers(item->GetWindow());
2948         }
2949         else
2950             wxFAIL_MSG("inconsistent wxSizerItem status!");
2951     }
2952 }
2953
2954 static void DrawSizers(wxWindowBase *win)
2955 {
2956     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2957
2958     wxSizer *sizer = win->GetSizer();
2959     if ( sizer )
2960     {
2961         DrawSizer(win, sizer);
2962     }
2963     else // no sizer, still recurse into the children
2964     {
2965         const wxWindowList& children = win->GetChildren();
2966         for ( wxWindowList::const_iterator i = children.begin(),
2967                                          end = children.end();
2968               i != end;
2969               ++i )
2970         {
2971             DrawSizers(*i);
2972         }
2973
2974         // show all kind of sizes of this window; see the "window sizing" topic
2975         // overview for more info about the various differences:
2976         wxSize fullSz = win->GetSize();
2977         wxSize clientSz = win->GetClientSize();
2978         wxSize bestSz = win->GetBestSize();
2979         wxSize minSz = win->GetMinSize();
2980         wxSize maxSz = win->GetMaxSize();
2981         wxSize virtualSz = win->GetVirtualSize();
2982
2983         wxMessageOutputDebug dbgout;
2984         dbgout.Printf(
2985             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
2986             win->GetName(),
2987             fullSz.x, fullSz.y,
2988             clientSz.x, clientSz.y,
2989             bestSz.x, bestSz.y,
2990             minSz.x, minSz.y,
2991             maxSz.x, maxSz.y,
2992             virtualSz.x, virtualSz.y);
2993     }
2994 }
2995
2996 #endif // wxDEBUG_LEVEL
2997
2998 // process special middle clicks
2999 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
3000 {
3001     if ( event.ControlDown() && event.AltDown() )
3002     {
3003 #if wxDEBUG_LEVEL > 1
3004         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
3005         if ( event.ShiftDown() )
3006         {
3007             DrawSizers(this);
3008         }
3009         else
3010 #endif // __WXDEBUG__
3011         {
3012 #if wxUSE_MSGDLG
3013             // just Ctrl-Alt-middle click shows information about wx version
3014             ::wxInfoMessageBox((wxWindow*)this);
3015 #endif // wxUSE_MSGDLG
3016         }
3017     }
3018     else
3019     {
3020         event.Skip();
3021     }
3022 }
3023
3024 // ----------------------------------------------------------------------------
3025 // accessibility
3026 // ----------------------------------------------------------------------------
3027
3028 #if wxUSE_ACCESSIBILITY
3029 void wxWindowBase::SetAccessible(wxAccessible* accessible)
3030 {
3031     if (m_accessible && (accessible != m_accessible))
3032         delete m_accessible;
3033     m_accessible = accessible;
3034     if (m_accessible)
3035         m_accessible->SetWindow((wxWindow*) this);
3036 }
3037
3038 // Returns the accessible object, creating if necessary.
3039 wxAccessible* wxWindowBase::GetOrCreateAccessible()
3040 {
3041     if (!m_accessible)
3042         m_accessible = CreateAccessible();
3043     return m_accessible;
3044 }
3045
3046 // Override to create a specific accessible object.
3047 wxAccessible* wxWindowBase::CreateAccessible()
3048 {
3049     return new wxWindowAccessible((wxWindow*) this);
3050 }
3051
3052 #endif
3053
3054 // ----------------------------------------------------------------------------
3055 // list classes implementation
3056 // ----------------------------------------------------------------------------
3057
3058 #if wxUSE_STD_CONTAINERS
3059
3060 #include "wx/listimpl.cpp"
3061 WX_DEFINE_LIST(wxWindowList)
3062
3063 #else // !wxUSE_STD_CONTAINERS
3064
3065 void wxWindowListNode::DeleteData()
3066 {
3067     delete (wxWindow *)GetData();
3068 }
3069
3070 #endif // wxUSE_STD_CONTAINERS/!wxUSE_STD_CONTAINERS
3071
3072 // ----------------------------------------------------------------------------
3073 // borders
3074 // ----------------------------------------------------------------------------
3075
3076 wxBorder wxWindowBase::GetBorder(long flags) const
3077 {
3078     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
3079     if ( border == wxBORDER_DEFAULT )
3080     {
3081         border = GetDefaultBorder();
3082     }
3083     else if ( border == wxBORDER_THEME )
3084     {
3085         border = GetDefaultBorderForControl();
3086     }
3087
3088     return border;
3089 }
3090
3091 wxBorder wxWindowBase::GetDefaultBorder() const
3092 {
3093     return wxBORDER_NONE;
3094 }
3095
3096 // ----------------------------------------------------------------------------
3097 // hit testing
3098 // ----------------------------------------------------------------------------
3099
3100 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
3101 {
3102     // here we just check if the point is inside the window or not
3103
3104     // check the top and left border first
3105     bool outside = x < 0 || y < 0;
3106     if ( !outside )
3107     {
3108         // check the right and bottom borders too
3109         wxSize size = GetSize();
3110         outside = x >= size.x || y >= size.y;
3111     }
3112
3113     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
3114 }
3115
3116 // ----------------------------------------------------------------------------
3117 // mouse capture
3118 // ----------------------------------------------------------------------------
3119
3120 struct WXDLLEXPORT wxWindowNext
3121 {
3122     wxWindow *win;
3123     wxWindowNext *next;
3124 } *wxWindowBase::ms_winCaptureNext = NULL;
3125 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
3126 bool wxWindowBase::ms_winCaptureChanging = false;
3127
3128 void wxWindowBase::CaptureMouse()
3129 {
3130     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
3131
3132     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
3133
3134     ms_winCaptureChanging = true;
3135
3136     wxWindow *winOld = GetCapture();
3137     if ( winOld )
3138     {
3139         ((wxWindowBase*) winOld)->DoReleaseMouse();
3140
3141         // save it on stack
3142         wxWindowNext *item = new wxWindowNext;
3143         item->win = winOld;
3144         item->next = ms_winCaptureNext;
3145         ms_winCaptureNext = item;
3146     }
3147     //else: no mouse capture to save
3148
3149     DoCaptureMouse();
3150     ms_winCaptureCurrent = (wxWindow*)this;
3151
3152     ms_winCaptureChanging = false;
3153 }
3154
3155 void wxWindowBase::ReleaseMouse()
3156 {
3157     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
3158
3159     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
3160
3161     wxASSERT_MSG( GetCapture() == this,
3162                   "attempt to release mouse, but this window hasn't captured it" );
3163     wxASSERT_MSG( ms_winCaptureCurrent == this,
3164                   "attempt to release mouse, but this window hasn't captured it" );
3165
3166     ms_winCaptureChanging = true;
3167
3168     DoReleaseMouse();
3169     ms_winCaptureCurrent = NULL;
3170
3171     if ( ms_winCaptureNext )
3172     {
3173         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
3174         ms_winCaptureCurrent = ms_winCaptureNext->win;
3175
3176         wxWindowNext *item = ms_winCaptureNext;
3177         ms_winCaptureNext = item->next;
3178         delete item;
3179     }
3180     //else: stack is empty, no previous capture
3181
3182     ms_winCaptureChanging = false;
3183
3184     wxLogTrace(wxT("mousecapture"),
3185         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
3186         static_cast<void*>(GetCapture()));
3187 }
3188
3189 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
3190 {
3191     wxMouseCaptureLostEvent event(win->GetId());
3192     event.SetEventObject(win);
3193     if ( !win->GetEventHandler()->ProcessEvent(event) )
3194     {
3195         // windows must handle this event, otherwise the app wouldn't behave
3196         // correctly if it loses capture unexpectedly; see the discussion here:
3197         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
3198         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
3199         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
3200     }
3201 }
3202
3203 /* static */
3204 void wxWindowBase::NotifyCaptureLost()
3205 {
3206     // don't do anything if capture lost was expected, i.e. resulted from
3207     // a wx call to ReleaseMouse or CaptureMouse:
3208     if ( ms_winCaptureChanging )
3209         return;
3210
3211     // if the capture was lost unexpectedly, notify every window that has
3212     // capture (on stack or current) about it and clear the stack:
3213
3214     if ( ms_winCaptureCurrent )
3215     {
3216         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
3217         ms_winCaptureCurrent = NULL;
3218     }
3219
3220     while ( ms_winCaptureNext )
3221     {
3222         wxWindowNext *item = ms_winCaptureNext;
3223         ms_winCaptureNext = item->next;
3224
3225         DoNotifyWindowAboutCaptureLost(item->win);
3226
3227         delete item;
3228     }
3229 }
3230
3231 #if wxUSE_HOTKEY
3232
3233 bool
3234 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
3235                              int WXUNUSED(modifiers),
3236                              int WXUNUSED(keycode))
3237 {
3238     // not implemented
3239     return false;
3240 }
3241
3242 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
3243 {
3244     // not implemented
3245     return false;
3246 }
3247
3248 #endif // wxUSE_HOTKEY
3249
3250 // ----------------------------------------------------------------------------
3251 // event processing
3252 // ----------------------------------------------------------------------------
3253
3254 bool wxWindowBase::TryBefore(wxEvent& event)
3255 {
3256 #if wxUSE_VALIDATORS
3257     // Can only use the validator of the window which
3258     // is receiving the event
3259     if ( event.GetEventObject() == this )
3260     {
3261         wxValidator * const validator = GetValidator();
3262         if ( validator && validator->ProcessEventLocally(event) )
3263         {
3264             return true;
3265         }
3266     }
3267 #endif // wxUSE_VALIDATORS
3268
3269     return wxEvtHandler::TryBefore(event);
3270 }
3271
3272 bool wxWindowBase::TryAfter(wxEvent& event)
3273 {
3274     // carry on up the parent-child hierarchy if the propagation count hasn't
3275     // reached zero yet
3276     if ( event.ShouldPropagate() )
3277     {
3278         // honour the requests to stop propagation at this window: this is
3279         // used by the dialogs, for example, to prevent processing the events
3280         // from the dialog controls in the parent frame which rarely, if ever,
3281         // makes sense
3282         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
3283         {
3284             wxWindow *parent = GetParent();
3285             if ( parent && !parent->IsBeingDeleted() )
3286             {
3287                 wxPropagateOnce propagateOnce(event);
3288
3289                 return parent->GetEventHandler()->ProcessEvent(event);
3290             }
3291         }
3292     }
3293
3294     return wxEvtHandler::TryAfter(event);
3295 }
3296
3297 // ----------------------------------------------------------------------------
3298 // window relationships
3299 // ----------------------------------------------------------------------------
3300
3301 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
3302 {
3303     wxCHECK_MSG( GetParent(), NULL,
3304                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
3305
3306     wxWindowList& siblings = GetParent()->GetChildren();
3307     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
3308     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
3309
3310     if ( order == OrderBefore )
3311         i = i->GetPrevious();
3312     else // OrderAfter
3313         i = i->GetNext();
3314
3315     return i ? i->GetData() : NULL;
3316 }
3317
3318 // ----------------------------------------------------------------------------
3319 // keyboard navigation
3320 // ----------------------------------------------------------------------------
3321
3322 // Navigates in the specified direction inside this window
3323 bool wxWindowBase::DoNavigateIn(int flags)
3324 {
3325 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
3326     // native code doesn't process our wxNavigationKeyEvents anyhow
3327     wxUnusedVar(flags);
3328     return false;
3329 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
3330     wxNavigationKeyEvent eventNav;
3331     wxWindow *focused = FindFocus();
3332     eventNav.SetCurrentFocus(focused);
3333     eventNav.SetEventObject(focused);
3334     eventNav.SetFlags(flags);
3335     return GetEventHandler()->ProcessEvent(eventNav);
3336 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
3337 }
3338
3339 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
3340 {
3341     if ( event.GetKeyCode() != WXK_TAB )
3342         return false;
3343
3344     int flags = wxNavigationKeyEvent::FromTab;
3345
3346     if ( event.ShiftDown() )
3347         flags |= wxNavigationKeyEvent::IsBackward;
3348     else
3349         flags |= wxNavigationKeyEvent::IsForward;
3350
3351     if ( event.ControlDown() )
3352         flags |= wxNavigationKeyEvent::WinChange;
3353
3354     Navigate(flags);
3355     return true;
3356 }
3357
3358 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
3359 {
3360     // check that we're not a top level window
3361     wxCHECK_RET( GetParent(),
3362                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
3363
3364     // detect the special case when we have nothing to do anyhow and when the
3365     // code below wouldn't work
3366     if ( win == this )
3367         return;
3368
3369     // find the target window in the siblings list
3370     wxWindowList& siblings = GetParent()->GetChildren();
3371     wxWindowList::compatibility_iterator i = siblings.Find(win);
3372     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3373
3374     // unfortunately, when wxUSE_STD_CONTAINERS == 1 DetachNode() is not
3375     // implemented so we can't just move the node around
3376     wxWindow *self = (wxWindow *)this;
3377     siblings.DeleteObject(self);
3378     if ( move == OrderAfter )
3379     {
3380         i = i->GetNext();
3381     }
3382
3383     if ( i )
3384     {
3385         siblings.Insert(i, self);
3386     }
3387     else // OrderAfter and win was the last sibling
3388     {
3389         siblings.Append(self);
3390     }
3391 }
3392
3393 // ----------------------------------------------------------------------------
3394 // focus handling
3395 // ----------------------------------------------------------------------------
3396
3397 /*static*/ wxWindow* wxWindowBase::FindFocus()
3398 {
3399     wxWindowBase *win = DoFindFocus();
3400     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3401 }
3402
3403 bool wxWindowBase::HasFocus() const
3404 {
3405     wxWindowBase* const win = DoFindFocus();
3406     return win &&
3407             (this == win || this == win->GetMainWindowOfCompositeControl());
3408 }
3409
3410 // ----------------------------------------------------------------------------
3411 // drag and drop
3412 // ----------------------------------------------------------------------------
3413
3414 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3415
3416 namespace
3417 {
3418
3419 class DragAcceptFilesTarget : public wxFileDropTarget
3420 {
3421 public:
3422     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3423
3424     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3425                              const wxArrayString& filenames)
3426     {
3427         wxDropFilesEvent event(wxEVT_DROP_FILES,
3428                                filenames.size(),
3429                                wxCArrayString(filenames).Release());
3430         event.SetEventObject(m_win);
3431         event.m_pos.x = x;
3432         event.m_pos.y = y;
3433
3434         return m_win->HandleWindowEvent(event);
3435     }
3436
3437 private:
3438     wxWindowBase * const m_win;
3439
3440     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3441 };
3442
3443
3444 } // anonymous namespace
3445
3446 // Generic version of DragAcceptFiles(). It works by installing a simple
3447 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3448 // together with explicit SetDropTarget() calls.
3449 void wxWindowBase::DragAcceptFiles(bool accept)
3450 {
3451     if ( accept )
3452     {
3453         wxASSERT_MSG( !GetDropTarget(),
3454                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3455         SetDropTarget(new DragAcceptFilesTarget(this));
3456     }
3457     else
3458     {
3459         SetDropTarget(NULL);
3460     }
3461 }
3462
3463 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3464
3465 // ----------------------------------------------------------------------------
3466 // global functions
3467 // ----------------------------------------------------------------------------
3468
3469 wxWindow* wxGetTopLevelParent(wxWindow *win)
3470 {
3471     while ( win && !win->IsTopLevel() )
3472          win = win->GetParent();
3473
3474     return win;
3475 }
3476
3477 #if wxUSE_ACCESSIBILITY
3478 // ----------------------------------------------------------------------------
3479 // accessible object for windows
3480 // ----------------------------------------------------------------------------
3481
3482 // Can return either a child object, or an integer
3483 // representing the child element, starting from 1.
3484 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3485 {
3486     wxASSERT( GetWindow() != NULL );
3487     if (!GetWindow())
3488         return wxACC_FAIL;
3489
3490     return wxACC_NOT_IMPLEMENTED;
3491 }
3492
3493 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3494 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3495 {
3496     wxASSERT( GetWindow() != NULL );
3497     if (!GetWindow())
3498         return wxACC_FAIL;
3499
3500     wxWindow* win = NULL;
3501     if (elementId == 0)
3502     {
3503         win = GetWindow();
3504     }
3505     else
3506     {
3507         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3508         {
3509             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3510         }
3511         else
3512             return wxACC_FAIL;
3513     }
3514     if (win)
3515     {
3516         rect = win->GetRect();
3517         if (win->GetParent() && !wxDynamicCast(win, wxTopLevelWindow))
3518             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3519         return wxACC_OK;
3520     }
3521
3522     return wxACC_NOT_IMPLEMENTED;
3523 }
3524
3525 // Navigates from fromId to toId/toObject.
3526 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3527                              int* WXUNUSED(toId), wxAccessible** toObject)
3528 {
3529     wxASSERT( GetWindow() != NULL );
3530     if (!GetWindow())
3531         return wxACC_FAIL;
3532
3533     switch (navDir)
3534     {
3535     case wxNAVDIR_FIRSTCHILD:
3536         {
3537             if (GetWindow()->GetChildren().GetCount() == 0)
3538                 return wxACC_FALSE;
3539             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3540             *toObject = childWindow->GetOrCreateAccessible();
3541
3542             return wxACC_OK;
3543         }
3544     case wxNAVDIR_LASTCHILD:
3545         {
3546             if (GetWindow()->GetChildren().GetCount() == 0)
3547                 return wxACC_FALSE;
3548             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3549             *toObject = childWindow->GetOrCreateAccessible();
3550
3551             return wxACC_OK;
3552         }
3553     case wxNAVDIR_RIGHT:
3554     case wxNAVDIR_DOWN:
3555     case wxNAVDIR_NEXT:
3556         {
3557             wxWindowList::compatibility_iterator node =
3558                 wxWindowList::compatibility_iterator();
3559             if (fromId == 0)
3560             {
3561                 // Can't navigate to sibling of this window
3562                 // if we're a top-level window.
3563                 if (!GetWindow()->GetParent())
3564                     return wxACC_NOT_IMPLEMENTED;
3565
3566                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3567             }
3568             else
3569             {
3570                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3571                     node = GetWindow()->GetChildren().Item(fromId-1);
3572             }
3573
3574             if (node && node->GetNext())
3575             {
3576                 wxWindow* nextWindow = node->GetNext()->GetData();
3577                 *toObject = nextWindow->GetOrCreateAccessible();
3578                 return wxACC_OK;
3579             }
3580             else
3581                 return wxACC_FALSE;
3582         }
3583     case wxNAVDIR_LEFT:
3584     case wxNAVDIR_UP:
3585     case wxNAVDIR_PREVIOUS:
3586         {
3587             wxWindowList::compatibility_iterator node =
3588                 wxWindowList::compatibility_iterator();
3589             if (fromId == 0)
3590             {
3591                 // Can't navigate to sibling of this window
3592                 // if we're a top-level window.
3593                 if (!GetWindow()->GetParent())
3594                     return wxACC_NOT_IMPLEMENTED;
3595
3596                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3597             }
3598             else
3599             {
3600                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3601                     node = GetWindow()->GetChildren().Item(fromId-1);
3602             }
3603
3604             if (node && node->GetPrevious())
3605             {
3606                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3607                 *toObject = previousWindow->GetOrCreateAccessible();
3608                 return wxACC_OK;
3609             }
3610             else
3611                 return wxACC_FALSE;
3612         }
3613     }
3614
3615     return wxACC_NOT_IMPLEMENTED;
3616 }
3617
3618 // Gets the name of the specified object.
3619 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3620 {
3621     wxASSERT( GetWindow() != NULL );
3622     if (!GetWindow())
3623         return wxACC_FAIL;
3624
3625     wxString title;
3626
3627     // If a child, leave wxWidgets to call the function on the actual
3628     // child object.
3629     if (childId > 0)
3630         return wxACC_NOT_IMPLEMENTED;
3631
3632     // This will eventually be replaced by specialised
3633     // accessible classes, one for each kind of wxWidgets
3634     // control or window.
3635 #if wxUSE_BUTTON
3636     if (wxDynamicCast(GetWindow(), wxButton))
3637         title = ((wxButton*) GetWindow())->GetLabel();
3638     else
3639 #endif
3640         title = GetWindow()->GetName();
3641
3642     if (!title.empty())
3643     {
3644         *name = title;
3645         return wxACC_OK;
3646     }
3647     else
3648         return wxACC_NOT_IMPLEMENTED;
3649 }
3650
3651 // Gets the number of children.
3652 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3653 {
3654     wxASSERT( GetWindow() != NULL );
3655     if (!GetWindow())
3656         return wxACC_FAIL;
3657
3658     *childId = (int) GetWindow()->GetChildren().GetCount();
3659     return wxACC_OK;
3660 }
3661
3662 // Gets the specified child (starting from 1).
3663 // If *child is NULL and return value is wxACC_OK,
3664 // this means that the child is a simple element and
3665 // not an accessible object.
3666 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3667 {
3668     wxASSERT( GetWindow() != NULL );
3669     if (!GetWindow())
3670         return wxACC_FAIL;
3671
3672     if (childId == 0)
3673     {
3674         *child = this;
3675         return wxACC_OK;
3676     }
3677
3678     if (childId > (int) GetWindow()->GetChildren().GetCount())
3679         return wxACC_FAIL;
3680
3681     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3682     *child = childWindow->GetOrCreateAccessible();
3683     if (*child)
3684         return wxACC_OK;
3685     else
3686         return wxACC_FAIL;
3687 }
3688
3689 // Gets the parent, or NULL.
3690 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3691 {
3692     wxASSERT( GetWindow() != NULL );
3693     if (!GetWindow())
3694         return wxACC_FAIL;
3695
3696     wxWindow* parentWindow = GetWindow()->GetParent();
3697     if (!parentWindow)
3698     {
3699         *parent = NULL;
3700         return wxACC_OK;
3701     }
3702     else
3703     {
3704         *parent = parentWindow->GetOrCreateAccessible();
3705         if (*parent)
3706             return wxACC_OK;
3707         else
3708             return wxACC_FAIL;
3709     }
3710 }
3711
3712 // Performs the default action. childId is 0 (the action for this object)
3713 // or > 0 (the action for a child).
3714 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3715 // window (e.g. an edit control).
3716 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3717 {
3718     wxASSERT( GetWindow() != NULL );
3719     if (!GetWindow())
3720         return wxACC_FAIL;
3721
3722     return wxACC_NOT_IMPLEMENTED;
3723 }
3724
3725 // Gets the default action for this object (0) or > 0 (the action for a child).
3726 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3727 // string if there is no action.
3728 // The retrieved string describes the action that is performed on an object,
3729 // not what the object does as a result. For example, a toolbar button that prints
3730 // a document has a default action of "Press" rather than "Prints the current document."
3731 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3732 {
3733     wxASSERT( GetWindow() != NULL );
3734     if (!GetWindow())
3735         return wxACC_FAIL;
3736
3737     return wxACC_NOT_IMPLEMENTED;
3738 }
3739
3740 // Returns the description for this object or a child.
3741 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3742 {
3743     wxASSERT( GetWindow() != NULL );
3744     if (!GetWindow())
3745         return wxACC_FAIL;
3746
3747     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3748     if (!ht.empty())
3749     {
3750         *description = ht;
3751         return wxACC_OK;
3752     }
3753     return wxACC_NOT_IMPLEMENTED;
3754 }
3755
3756 // Returns help text for this object or a child, similar to tooltip text.
3757 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3758 {
3759     wxASSERT( GetWindow() != NULL );
3760     if (!GetWindow())
3761         return wxACC_FAIL;
3762
3763     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3764     if (!ht.empty())
3765     {
3766         *helpText = ht;
3767         return wxACC_OK;
3768     }
3769     return wxACC_NOT_IMPLEMENTED;
3770 }
3771
3772 // Returns the keyboard shortcut for this object or child.
3773 // Return e.g. ALT+K
3774 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3775 {
3776     wxASSERT( GetWindow() != NULL );
3777     if (!GetWindow())
3778         return wxACC_FAIL;
3779
3780     return wxACC_NOT_IMPLEMENTED;
3781 }
3782
3783 // Returns a role constant.
3784 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3785 {
3786     wxASSERT( GetWindow() != NULL );
3787     if (!GetWindow())
3788         return wxACC_FAIL;
3789
3790     // If a child, leave wxWidgets to call the function on the actual
3791     // child object.
3792     if (childId > 0)
3793         return wxACC_NOT_IMPLEMENTED;
3794
3795     if (wxDynamicCast(GetWindow(), wxControl))
3796         return wxACC_NOT_IMPLEMENTED;
3797 #if wxUSE_STATUSBAR
3798     if (wxDynamicCast(GetWindow(), wxStatusBar))
3799         return wxACC_NOT_IMPLEMENTED;
3800 #endif
3801 #if wxUSE_TOOLBAR
3802     if (wxDynamicCast(GetWindow(), wxToolBar))
3803         return wxACC_NOT_IMPLEMENTED;
3804 #endif
3805
3806     //*role = wxROLE_SYSTEM_CLIENT;
3807     *role = wxROLE_SYSTEM_CLIENT;
3808     return wxACC_OK;
3809
3810     #if 0
3811     return wxACC_NOT_IMPLEMENTED;
3812     #endif
3813 }
3814
3815 // Returns a state constant.
3816 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3817 {
3818     wxASSERT( GetWindow() != NULL );
3819     if (!GetWindow())
3820         return wxACC_FAIL;
3821
3822     // If a child, leave wxWidgets to call the function on the actual
3823     // child object.
3824     if (childId > 0)
3825         return wxACC_NOT_IMPLEMENTED;
3826
3827     if (wxDynamicCast(GetWindow(), wxControl))
3828         return wxACC_NOT_IMPLEMENTED;
3829
3830 #if wxUSE_STATUSBAR
3831     if (wxDynamicCast(GetWindow(), wxStatusBar))
3832         return wxACC_NOT_IMPLEMENTED;
3833 #endif
3834 #if wxUSE_TOOLBAR
3835     if (wxDynamicCast(GetWindow(), wxToolBar))
3836         return wxACC_NOT_IMPLEMENTED;
3837 #endif
3838
3839     *state = 0;
3840     return wxACC_OK;
3841
3842     #if 0
3843     return wxACC_NOT_IMPLEMENTED;
3844     #endif
3845 }
3846
3847 // Returns a localized string representing the value for the object
3848 // or child.
3849 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3850 {
3851     wxASSERT( GetWindow() != NULL );
3852     if (!GetWindow())
3853         return wxACC_FAIL;
3854
3855     return wxACC_NOT_IMPLEMENTED;
3856 }
3857
3858 // Selects the object or child.
3859 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3860 {
3861     wxASSERT( GetWindow() != NULL );
3862     if (!GetWindow())
3863         return wxACC_FAIL;
3864
3865     return wxACC_NOT_IMPLEMENTED;
3866 }
3867
3868 // Gets the window with the keyboard focus.
3869 // If childId is 0 and child is NULL, no object in
3870 // this subhierarchy has the focus.
3871 // If this object has the focus, child should be 'this'.
3872 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3873 {
3874     wxASSERT( GetWindow() != NULL );
3875     if (!GetWindow())
3876         return wxACC_FAIL;
3877
3878     return wxACC_NOT_IMPLEMENTED;
3879 }
3880
3881 #if wxUSE_VARIANT
3882 // Gets a variant representing the selected children
3883 // of this object.
3884 // Acceptable values:
3885 // - a null variant (IsNull() returns true)
3886 // - a list variant (GetType() == wxT("list")
3887 // - an integer representing the selected child element,
3888 //   or 0 if this object is selected (GetType() == wxT("long")
3889 // - a "void*" pointer to a wxAccessible child object
3890 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3891 {
3892     wxASSERT( GetWindow() != NULL );
3893     if (!GetWindow())
3894         return wxACC_FAIL;
3895
3896     return wxACC_NOT_IMPLEMENTED;
3897 }
3898 #endif // wxUSE_VARIANT
3899
3900 #endif // wxUSE_ACCESSIBILITY
3901
3902 // ----------------------------------------------------------------------------
3903 // RTL support
3904 // ----------------------------------------------------------------------------
3905
3906 wxCoord
3907 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3908                                        wxCoord width,
3909                                        wxCoord widthTotal) const
3910 {
3911     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3912     {
3913         x = widthTotal - x - width;
3914     }
3915
3916     return x;
3917 }
3918
3919