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