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
1443     // It is harmless but useless to unset the previous handler of the window
1444     // itself as it's always NULL anyhow, so don't do this.
1445     if ( secondHandler != this )
1446         secondHandler->SetPreviousHandler(NULL);
1447
1448     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1449     SetEventHandler(secondHandler);
1450
1451     if ( deleteHandler )
1452     {
1453         wxDELETE(firstHandler);
1454     }
1455
1456     return firstHandler;
1457 }
1458
1459 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1460 {
1461     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1462     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1463
1464     if (handlerToRemove == GetEventHandler())
1465     {
1466         // removing the first event handler is equivalent to "popping" the stack
1467         PopEventHandler(false);
1468         return true;
1469     }
1470
1471     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1472     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1473     while ( handlerCur != this && handlerCur )
1474     {
1475         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1476
1477         if ( handlerCur == handlerToRemove )
1478         {
1479             handlerCur->Unlink();
1480
1481             wxASSERT_MSG( handlerCur != GetEventHandler(),
1482                         "the case Remove == Pop should was already handled" );
1483             return true;
1484         }
1485
1486         handlerCur = handlerNext;
1487     }
1488
1489     wxFAIL_MSG( wxT("where has the event handler gone?") );
1490
1491     return false;
1492 }
1493
1494 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1495 {
1496     // SafelyProcessEvent() will handle exceptions nicely
1497     return GetEventHandler()->SafelyProcessEvent(event);
1498 }
1499
1500 // ----------------------------------------------------------------------------
1501 // colours, fonts &c
1502 // ----------------------------------------------------------------------------
1503
1504 void wxWindowBase::InheritAttributes()
1505 {
1506     const wxWindowBase * const parent = GetParent();
1507     if ( !parent )
1508         return;
1509
1510     // we only inherit attributes which had been explicitly set for the parent
1511     // which ensures that this only happens if the user really wants it and
1512     // not by default which wouldn't make any sense in modern GUIs where the
1513     // controls don't all use the same fonts (nor colours)
1514     if ( parent->m_inheritFont && !m_hasFont )
1515         SetFont(parent->GetFont());
1516
1517     // in addition, there is a possibility to explicitly forbid inheriting
1518     // colours at each class level by overriding ShouldInheritColours()
1519     if ( ShouldInheritColours() )
1520     {
1521         if ( parent->m_inheritFgCol && !m_hasFgCol )
1522             SetForegroundColour(parent->GetForegroundColour());
1523
1524         // inheriting (solid) background colour is wrong as it totally breaks
1525         // any kind of themed backgrounds
1526         //
1527         // instead, the controls should use the same background as their parent
1528         // (ideally by not drawing it at all)
1529 #if 0
1530         if ( parent->m_inheritBgCol && !m_hasBgCol )
1531             SetBackgroundColour(parent->GetBackgroundColour());
1532 #endif // 0
1533     }
1534 }
1535
1536 /* static */ wxVisualAttributes
1537 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1538 {
1539     // it is important to return valid values for all attributes from here,
1540     // GetXXX() below rely on this
1541     wxVisualAttributes attrs;
1542     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1543     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1544
1545     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1546     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1547     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1548     // colour on other platforms.
1549
1550 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1551     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1552 #else
1553     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1554 #endif
1555     return attrs;
1556 }
1557
1558 wxColour wxWindowBase::GetBackgroundColour() const
1559 {
1560     if ( !m_backgroundColour.IsOk() )
1561     {
1562         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1563
1564         // get our default background colour
1565         wxColour colBg = GetDefaultAttributes().colBg;
1566
1567         // we must return some valid colour to avoid redoing this every time
1568         // and also to avoid surprising the applications written for older
1569         // wxWidgets versions where GetBackgroundColour() always returned
1570         // something -- so give them something even if it doesn't make sense
1571         // for this window (e.g. it has a themed background)
1572         if ( !colBg.IsOk() )
1573             colBg = GetClassDefaultAttributes().colBg;
1574
1575         return colBg;
1576     }
1577     else
1578         return m_backgroundColour;
1579 }
1580
1581 wxColour wxWindowBase::GetForegroundColour() const
1582 {
1583     // logic is the same as above
1584     if ( !m_hasFgCol && !m_foregroundColour.IsOk() )
1585     {
1586         wxColour colFg = GetDefaultAttributes().colFg;
1587
1588         if ( !colFg.IsOk() )
1589             colFg = GetClassDefaultAttributes().colFg;
1590
1591         return colFg;
1592     }
1593     else
1594         return m_foregroundColour;
1595 }
1596
1597 bool wxWindowBase::SetBackgroundStyle(wxBackgroundStyle style)
1598 {
1599     // The checks below shouldn't be triggered if we're not really changing the
1600     // style.
1601     if ( style == m_backgroundStyle )
1602         return true;
1603
1604     // Transparent background style can be only set before creation because of
1605     // wxGTK limitation.
1606     wxCHECK_MSG( (style != wxBG_STYLE_TRANSPARENT) || !GetHandle(),
1607                  false,
1608                  "wxBG_STYLE_TRANSPARENT style can only be set before "
1609                  "Create()-ing the window." );
1610
1611     // And once it is set, wxBG_STYLE_TRANSPARENT can't be unset.
1612     wxCHECK_MSG( (m_backgroundStyle != wxBG_STYLE_TRANSPARENT) ||
1613                  (style == wxBG_STYLE_TRANSPARENT),
1614                  false,
1615                  "wxBG_STYLE_TRANSPARENT can't be unset once it was set." );
1616
1617     m_backgroundStyle = style;
1618
1619     return true;
1620 }
1621
1622 bool wxWindowBase::IsTransparentBackgroundSupported(wxString *reason) const
1623 {
1624     if ( reason )
1625         *reason = _("This platform does not support background transparency.");
1626
1627     return false;
1628 }
1629
1630 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1631 {
1632     if ( colour == m_backgroundColour )
1633         return false;
1634
1635     m_hasBgCol = colour.IsOk();
1636
1637     m_inheritBgCol = m_hasBgCol;
1638     m_backgroundColour = colour;
1639     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.IsOk() );
1640     return true;
1641 }
1642
1643 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1644 {
1645     if (colour == m_foregroundColour )
1646         return false;
1647
1648     m_hasFgCol = colour.IsOk();
1649     m_inheritFgCol = m_hasFgCol;
1650     m_foregroundColour = colour;
1651     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.IsOk() );
1652     return true;
1653 }
1654
1655 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1656 {
1657     // setting an invalid cursor is ok, it means that we don't have any special
1658     // cursor
1659     if ( m_cursor.IsSameAs(cursor) )
1660     {
1661         // no change
1662         return false;
1663     }
1664
1665     m_cursor = cursor;
1666
1667     return true;
1668 }
1669
1670 wxFont wxWindowBase::GetFont() const
1671 {
1672     // logic is the same as in GetBackgroundColour()
1673     if ( !m_font.IsOk() )
1674     {
1675         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1676
1677         wxFont font = GetDefaultAttributes().font;
1678         if ( !font.IsOk() )
1679             font = GetClassDefaultAttributes().font;
1680
1681         return font;
1682     }
1683     else
1684         return m_font;
1685 }
1686
1687 bool wxWindowBase::SetFont(const wxFont& font)
1688 {
1689     if ( font == m_font )
1690     {
1691         // no change
1692         return false;
1693     }
1694
1695     m_font = font;
1696     m_hasFont = font.IsOk();
1697     m_inheritFont = m_hasFont;
1698
1699     InvalidateBestSize();
1700
1701     return true;
1702 }
1703
1704 #if wxUSE_PALETTE
1705
1706 void wxWindowBase::SetPalette(const wxPalette& pal)
1707 {
1708     m_hasCustomPalette = true;
1709     m_palette = pal;
1710
1711     // VZ: can anyone explain me what do we do here?
1712     wxWindowDC d((wxWindow *) this);
1713     d.SetPalette(pal);
1714 }
1715
1716 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1717 {
1718     wxWindow *win = (wxWindow *)this;
1719     while ( win && !win->HasCustomPalette() )
1720     {
1721         win = win->GetParent();
1722     }
1723
1724     return win;
1725 }
1726
1727 #endif // wxUSE_PALETTE
1728
1729 #if wxUSE_CARET
1730 void wxWindowBase::SetCaret(wxCaret *caret)
1731 {
1732     if ( m_caret )
1733     {
1734         delete m_caret;
1735     }
1736
1737     m_caret = caret;
1738
1739     if ( m_caret )
1740     {
1741         wxASSERT_MSG( m_caret->GetWindow() == this,
1742                       wxT("caret should be created associated to this window") );
1743     }
1744 }
1745 #endif // wxUSE_CARET
1746
1747 #if wxUSE_VALIDATORS
1748 // ----------------------------------------------------------------------------
1749 // validators
1750 // ----------------------------------------------------------------------------
1751
1752 void wxWindowBase::SetValidator(const wxValidator& validator)
1753 {
1754     if ( m_windowValidator )
1755         delete m_windowValidator;
1756
1757     m_windowValidator = (wxValidator *)validator.Clone();
1758
1759     if ( m_windowValidator )
1760         m_windowValidator->SetWindow(this);
1761 }
1762 #endif // wxUSE_VALIDATORS
1763
1764 // ----------------------------------------------------------------------------
1765 // update region stuff
1766 // ----------------------------------------------------------------------------
1767
1768 wxRect wxWindowBase::GetUpdateClientRect() const
1769 {
1770     wxRegion rgnUpdate = GetUpdateRegion();
1771     rgnUpdate.Intersect(GetClientRect());
1772     wxRect rectUpdate = rgnUpdate.GetBox();
1773     wxPoint ptOrigin = GetClientAreaOrigin();
1774     rectUpdate.x -= ptOrigin.x;
1775     rectUpdate.y -= ptOrigin.y;
1776
1777     return rectUpdate;
1778 }
1779
1780 bool wxWindowBase::DoIsExposed(int x, int y) const
1781 {
1782     return m_updateRegion.Contains(x, y) != wxOutRegion;
1783 }
1784
1785 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1786 {
1787     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1788 }
1789
1790 void wxWindowBase::ClearBackground()
1791 {
1792     // wxGTK uses its own version, no need to add never used code
1793 #ifndef __WXGTK__
1794     wxClientDC dc((wxWindow *)this);
1795     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1796     dc.SetBackground(brush);
1797     dc.Clear();
1798 #endif // __WXGTK__
1799 }
1800
1801 // ----------------------------------------------------------------------------
1802 // find child window by id or name
1803 // ----------------------------------------------------------------------------
1804
1805 wxWindow *wxWindowBase::FindWindow(long id) const
1806 {
1807     if ( id == m_windowId )
1808         return (wxWindow *)this;
1809
1810     wxWindowBase *res = NULL;
1811     wxWindowList::compatibility_iterator node;
1812     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1813     {
1814         wxWindowBase *child = node->GetData();
1815         res = child->FindWindow( id );
1816     }
1817
1818     return (wxWindow *)res;
1819 }
1820
1821 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1822 {
1823     if ( name == m_windowName )
1824         return (wxWindow *)this;
1825
1826     wxWindowBase *res = NULL;
1827     wxWindowList::compatibility_iterator node;
1828     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1829     {
1830         wxWindow *child = node->GetData();
1831         res = child->FindWindow(name);
1832     }
1833
1834     return (wxWindow *)res;
1835 }
1836
1837
1838 // find any window by id or name or label: If parent is non-NULL, look through
1839 // children for a label or title matching the specified string. If NULL, look
1840 // through all top-level windows.
1841 //
1842 // to avoid duplicating code we reuse the same helper function but with
1843 // different comparators
1844
1845 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1846                                 const wxString& label, long id);
1847
1848 static
1849 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1850                            long WXUNUSED(id))
1851 {
1852     return win->GetLabel() == label;
1853 }
1854
1855 static
1856 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1857                           long WXUNUSED(id))
1858 {
1859     return win->GetName() == label;
1860 }
1861
1862 static
1863 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1864                         long id)
1865 {
1866     return win->GetId() == id;
1867 }
1868
1869 // recursive helper for the FindWindowByXXX() functions
1870 static
1871 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1872                                   const wxString& label,
1873                                   long id,
1874                                   wxFindWindowCmp cmp)
1875 {
1876     if ( parent )
1877     {
1878         // see if this is the one we're looking for
1879         if ( (*cmp)(parent, label, id) )
1880             return (wxWindow *)parent;
1881
1882         // It wasn't, so check all its children
1883         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1884               node;
1885               node = node->GetNext() )
1886         {
1887             // recursively check each child
1888             wxWindow *win = (wxWindow *)node->GetData();
1889             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1890             if (retwin)
1891                 return retwin;
1892         }
1893     }
1894
1895     // Not found
1896     return NULL;
1897 }
1898
1899 // helper for FindWindowByXXX()
1900 static
1901 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1902                              const wxString& label,
1903                              long id,
1904                              wxFindWindowCmp cmp)
1905 {
1906     if ( parent )
1907     {
1908         // just check parent and all its children
1909         return wxFindWindowRecursively(parent, label, id, cmp);
1910     }
1911
1912     // start at very top of wx's windows
1913     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1914           node;
1915           node = node->GetNext() )
1916     {
1917         // recursively check each window & its children
1918         wxWindow *win = node->GetData();
1919         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1920         if (retwin)
1921             return retwin;
1922     }
1923
1924     return NULL;
1925 }
1926
1927 /* static */
1928 wxWindow *
1929 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1930 {
1931     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1932 }
1933
1934 /* static */
1935 wxWindow *
1936 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1937 {
1938     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1939
1940     if ( !win )
1941     {
1942         // fall back to the label
1943         win = FindWindowByLabel(title, parent);
1944     }
1945
1946     return win;
1947 }
1948
1949 /* static */
1950 wxWindow *
1951 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1952 {
1953     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1954 }
1955
1956 // ----------------------------------------------------------------------------
1957 // dialog oriented functions
1958 // ----------------------------------------------------------------------------
1959
1960 #if WXWIN_COMPATIBILITY_2_8
1961 void wxWindowBase::MakeModal(bool modal)
1962 {
1963     // Disable all other windows
1964     if ( IsTopLevel() )
1965     {
1966         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1967         while (node)
1968         {
1969             wxWindow *win = node->GetData();
1970             if (win != this)
1971                 win->Enable(!modal);
1972
1973             node = node->GetNext();
1974         }
1975     }
1976 }
1977 #endif // WXWIN_COMPATIBILITY_2_8
1978
1979 bool wxWindowBase::Validate()
1980 {
1981 #if wxUSE_VALIDATORS
1982     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1983
1984     wxWindowList::compatibility_iterator node;
1985     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1986     {
1987         wxWindowBase *child = node->GetData();
1988         wxValidator *validator = child->GetValidator();
1989         if ( validator && !validator->Validate((wxWindow *)this) )
1990         {
1991             return false;
1992         }
1993
1994         if ( recurse && !child->Validate() )
1995         {
1996             return false;
1997         }
1998     }
1999 #endif // wxUSE_VALIDATORS
2000
2001     return true;
2002 }
2003
2004 bool wxWindowBase::TransferDataToWindow()
2005 {
2006 #if wxUSE_VALIDATORS
2007     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
2008
2009     wxWindowList::compatibility_iterator node;
2010     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
2011     {
2012         wxWindowBase *child = node->GetData();
2013         wxValidator *validator = child->GetValidator();
2014         if ( validator && !validator->TransferToWindow() )
2015         {
2016             wxLogWarning(_("Could not transfer data to window"));
2017 #if wxUSE_LOG
2018             wxLog::FlushActive();
2019 #endif // wxUSE_LOG
2020
2021             return false;
2022         }
2023
2024         if ( recurse )
2025         {
2026             if ( !child->TransferDataToWindow() )
2027             {
2028                 // warning already given
2029                 return false;
2030             }
2031         }
2032     }
2033 #endif // wxUSE_VALIDATORS
2034
2035     return true;
2036 }
2037
2038 bool wxWindowBase::TransferDataFromWindow()
2039 {
2040 #if wxUSE_VALIDATORS
2041     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
2042
2043     wxWindowList::compatibility_iterator node;
2044     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
2045     {
2046         wxWindow *child = node->GetData();
2047         wxValidator *validator = child->GetValidator();
2048         if ( validator && !validator->TransferFromWindow() )
2049         {
2050             // nop warning here because the application is supposed to give
2051             // one itself - we don't know here what might have gone wrongly
2052
2053             return false;
2054         }
2055
2056         if ( recurse )
2057         {
2058             if ( !child->TransferDataFromWindow() )
2059             {
2060                 // warning already given
2061                 return false;
2062             }
2063         }
2064     }
2065 #endif // wxUSE_VALIDATORS
2066
2067     return true;
2068 }
2069
2070 void wxWindowBase::InitDialog()
2071 {
2072     wxInitDialogEvent event(GetId());
2073     event.SetEventObject( this );
2074     GetEventHandler()->ProcessEvent(event);
2075 }
2076
2077 // ----------------------------------------------------------------------------
2078 // context-sensitive help support
2079 // ----------------------------------------------------------------------------
2080
2081 #if wxUSE_HELP
2082
2083 // associate this help text with this window
2084 void wxWindowBase::SetHelpText(const wxString& text)
2085 {
2086     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2087     if ( helpProvider )
2088     {
2089         helpProvider->AddHelp(this, text);
2090     }
2091 }
2092
2093 #if WXWIN_COMPATIBILITY_2_8
2094 // associate this help text with all windows with the same id as this
2095 // one
2096 void wxWindowBase::SetHelpTextForId(const wxString& text)
2097 {
2098     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2099     if ( helpProvider )
2100     {
2101         helpProvider->AddHelp(GetId(), text);
2102     }
2103 }
2104 #endif // WXWIN_COMPATIBILITY_2_8
2105
2106 // get the help string associated with this window (may be empty)
2107 // default implementation forwards calls to the help provider
2108 wxString
2109 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
2110                                  wxHelpEvent::Origin WXUNUSED(origin)) const
2111 {
2112     wxString text;
2113     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2114     if ( helpProvider )
2115     {
2116         text = helpProvider->GetHelp(this);
2117     }
2118
2119     return text;
2120 }
2121
2122 // show help for this window
2123 void wxWindowBase::OnHelp(wxHelpEvent& event)
2124 {
2125     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2126     if ( helpProvider )
2127     {
2128         wxPoint pos = event.GetPosition();
2129         const wxHelpEvent::Origin origin = event.GetOrigin();
2130         if ( origin == wxHelpEvent::Origin_Keyboard )
2131         {
2132             // if the help event was generated from keyboard it shouldn't
2133             // appear at the mouse position (which is still the only position
2134             // associated with help event) if the mouse is far away, although
2135             // we still do use the mouse position if it's over the window
2136             // because we suppose the user looks approximately at the mouse
2137             // already and so it would be more convenient than showing tooltip
2138             // at some arbitrary position which can be quite far from it
2139             const wxRect rectClient = GetClientRect();
2140             if ( !rectClient.Contains(ScreenToClient(pos)) )
2141             {
2142                 // position help slightly under and to the right of this window
2143                 pos = ClientToScreen(wxPoint(
2144                         2*GetCharWidth(),
2145                         rectClient.height + GetCharHeight()
2146                       ));
2147             }
2148         }
2149
2150         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
2151         {
2152             // skip the event.Skip() below
2153             return;
2154         }
2155     }
2156
2157     event.Skip();
2158 }
2159
2160 #endif // wxUSE_HELP
2161
2162 // ----------------------------------------------------------------------------
2163 // tooltips
2164 // ----------------------------------------------------------------------------
2165
2166 #if wxUSE_TOOLTIPS
2167
2168 wxString wxWindowBase::GetToolTipText() const
2169 {
2170     return m_tooltip ? m_tooltip->GetTip() : wxString();
2171 }
2172
2173 void wxWindowBase::SetToolTip( const wxString &tip )
2174 {
2175     // don't create the new tooltip if we already have one
2176     if ( m_tooltip )
2177     {
2178         m_tooltip->SetTip( tip );
2179     }
2180     else
2181     {
2182         SetToolTip( new wxToolTip( tip ) );
2183     }
2184
2185     // setting empty tooltip text does not remove the tooltip any more - use
2186     // SetToolTip(NULL) for this
2187 }
2188
2189 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
2190 {
2191     if ( m_tooltip != tooltip )
2192     {
2193         if ( m_tooltip )
2194             delete m_tooltip;
2195
2196         m_tooltip = tooltip;
2197     }
2198 }
2199
2200 bool wxWindowBase::CopyToolTip(wxToolTip *tip)
2201 {
2202     SetToolTip(tip ? new wxToolTip(tip->GetTip()) : NULL);
2203
2204     return tip != NULL;
2205 }
2206
2207 #endif // wxUSE_TOOLTIPS
2208
2209 // ----------------------------------------------------------------------------
2210 // constraints and sizers
2211 // ----------------------------------------------------------------------------
2212
2213 #if wxUSE_CONSTRAINTS
2214
2215 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
2216 {
2217     if ( m_constraints )
2218     {
2219         UnsetConstraints(m_constraints);
2220         delete m_constraints;
2221     }
2222     m_constraints = constraints;
2223     if ( m_constraints )
2224     {
2225         // Make sure other windows know they're part of a 'meaningful relationship'
2226         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
2227             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
2228         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
2229             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
2230         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
2231             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
2232         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
2233             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
2234         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
2235             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
2236         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
2237             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
2238         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
2239             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
2240         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
2241             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
2242     }
2243 }
2244
2245 // This removes any dangling pointers to this window in other windows'
2246 // constraintsInvolvedIn lists.
2247 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
2248 {
2249     if ( c )
2250     {
2251         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2252             c->left.GetOtherWindow()->RemoveConstraintReference(this);
2253         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2254             c->top.GetOtherWindow()->RemoveConstraintReference(this);
2255         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
2256             c->right.GetOtherWindow()->RemoveConstraintReference(this);
2257         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
2258             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
2259         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
2260             c->width.GetOtherWindow()->RemoveConstraintReference(this);
2261         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
2262             c->height.GetOtherWindow()->RemoveConstraintReference(this);
2263         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
2264             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
2265         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
2266             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
2267     }
2268 }
2269
2270 // Back-pointer to other windows we're involved with, so if we delete this
2271 // window, we must delete any constraints we're involved with.
2272 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
2273 {
2274     if ( !m_constraintsInvolvedIn )
2275         m_constraintsInvolvedIn = new wxWindowList;
2276     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
2277         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
2278 }
2279
2280 // REMOVE back-pointer to other windows we're involved with.
2281 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
2282 {
2283     if ( m_constraintsInvolvedIn )
2284         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
2285 }
2286
2287 // Reset any constraints that mention this window
2288 void wxWindowBase::DeleteRelatedConstraints()
2289 {
2290     if ( m_constraintsInvolvedIn )
2291     {
2292         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
2293         while (node)
2294         {
2295             wxWindow *win = node->GetData();
2296             wxLayoutConstraints *constr = win->GetConstraints();
2297
2298             // Reset any constraints involving this window
2299             if ( constr )
2300             {
2301                 constr->left.ResetIfWin(this);
2302                 constr->top.ResetIfWin(this);
2303                 constr->right.ResetIfWin(this);
2304                 constr->bottom.ResetIfWin(this);
2305                 constr->width.ResetIfWin(this);
2306                 constr->height.ResetIfWin(this);
2307                 constr->centreX.ResetIfWin(this);
2308                 constr->centreY.ResetIfWin(this);
2309             }
2310
2311             wxWindowList::compatibility_iterator next = node->GetNext();
2312             m_constraintsInvolvedIn->Erase(node);
2313             node = next;
2314         }
2315
2316         wxDELETE(m_constraintsInvolvedIn);
2317     }
2318 }
2319
2320 #endif // wxUSE_CONSTRAINTS
2321
2322 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2323 {
2324     if ( sizer == m_windowSizer)
2325         return;
2326
2327     if ( m_windowSizer )
2328     {
2329         m_windowSizer->SetContainingWindow(NULL);
2330
2331         if ( deleteOld )
2332             delete m_windowSizer;
2333     }
2334
2335     m_windowSizer = sizer;
2336     if ( m_windowSizer )
2337     {
2338         m_windowSizer->SetContainingWindow((wxWindow *)this);
2339     }
2340
2341     SetAutoLayout(m_windowSizer != NULL);
2342 }
2343
2344 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2345 {
2346     SetSizer( sizer, deleteOld );
2347     sizer->SetSizeHints( (wxWindow*) this );
2348 }
2349
2350
2351 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2352 {
2353     // adding a window to a sizer twice is going to result in fatal and
2354     // hard to debug problems later because when deleting the second
2355     // associated wxSizerItem we're going to dereference a dangling
2356     // pointer; so try to detect this as early as possible
2357     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2358                   wxT("Adding a window to the same sizer twice?") );
2359
2360     m_containingSizer = sizer;
2361 }
2362
2363 #if wxUSE_CONSTRAINTS
2364
2365 void wxWindowBase::SatisfyConstraints()
2366 {
2367     wxLayoutConstraints *constr = GetConstraints();
2368     bool wasOk = constr && constr->AreSatisfied();
2369
2370     ResetConstraints();   // Mark all constraints as unevaluated
2371
2372     int noChanges = 1;
2373
2374     // if we're a top level panel (i.e. our parent is frame/dialog), our
2375     // own constraints will never be satisfied any more unless we do it
2376     // here
2377     if ( wasOk )
2378     {
2379         while ( noChanges > 0 )
2380         {
2381             LayoutPhase1(&noChanges);
2382         }
2383     }
2384
2385     LayoutPhase2(&noChanges);
2386 }
2387
2388 #endif // wxUSE_CONSTRAINTS
2389
2390 bool wxWindowBase::Layout()
2391 {
2392     // If there is a sizer, use it instead of the constraints
2393     if ( GetSizer() )
2394     {
2395         int w = 0, h = 0;
2396         GetVirtualSize(&w, &h);
2397         GetSizer()->SetDimension( 0, 0, w, h );
2398     }
2399 #if wxUSE_CONSTRAINTS
2400     else
2401     {
2402         SatisfyConstraints(); // Find the right constraints values
2403         SetConstraintSizes(); // Recursively set the real window sizes
2404     }
2405 #endif
2406
2407     return true;
2408 }
2409
2410 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2411 {
2412     if ( GetAutoLayout() )
2413         Layout();
2414
2415     event.Skip();
2416 }
2417
2418 #if wxUSE_CONSTRAINTS
2419
2420 // first phase of the constraints evaluation: set our own constraints
2421 bool wxWindowBase::LayoutPhase1(int *noChanges)
2422 {
2423     wxLayoutConstraints *constr = GetConstraints();
2424
2425     return !constr || constr->SatisfyConstraints(this, noChanges);
2426 }
2427
2428 // second phase: set the constraints for our children
2429 bool wxWindowBase::LayoutPhase2(int *noChanges)
2430 {
2431     *noChanges = 0;
2432
2433     // Layout children
2434     DoPhase(1);
2435
2436     // Layout grand children
2437     DoPhase(2);
2438
2439     return true;
2440 }
2441
2442 // Do a phase of evaluating child constraints
2443 bool wxWindowBase::DoPhase(int phase)
2444 {
2445     // the list containing the children for which the constraints are already
2446     // set correctly
2447     wxWindowList succeeded;
2448
2449     // the max number of iterations we loop before concluding that we can't set
2450     // the constraints
2451     static const int maxIterations = 500;
2452
2453     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2454     {
2455         int noChanges = 0;
2456
2457         // loop over all children setting their constraints
2458         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2459               node;
2460               node = node->GetNext() )
2461         {
2462             wxWindow *child = node->GetData();
2463             if ( child->IsTopLevel() )
2464             {
2465                 // top level children are not inside our client area
2466                 continue;
2467             }
2468
2469             if ( !child->GetConstraints() || succeeded.Find(child) )
2470             {
2471                 // this one is either already ok or nothing we can do about it
2472                 continue;
2473             }
2474
2475             int tempNoChanges = 0;
2476             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2477                                       : child->LayoutPhase2(&tempNoChanges);
2478             noChanges += tempNoChanges;
2479
2480             if ( success )
2481             {
2482                 succeeded.Append(child);
2483             }
2484         }
2485
2486         if ( !noChanges )
2487         {
2488             // constraints are set
2489             break;
2490         }
2491     }
2492
2493     return true;
2494 }
2495
2496 void wxWindowBase::ResetConstraints()
2497 {
2498     wxLayoutConstraints *constr = GetConstraints();
2499     if ( constr )
2500     {
2501         constr->left.SetDone(false);
2502         constr->top.SetDone(false);
2503         constr->right.SetDone(false);
2504         constr->bottom.SetDone(false);
2505         constr->width.SetDone(false);
2506         constr->height.SetDone(false);
2507         constr->centreX.SetDone(false);
2508         constr->centreY.SetDone(false);
2509     }
2510
2511     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2512     while (node)
2513     {
2514         wxWindow *win = node->GetData();
2515         if ( !win->IsTopLevel() )
2516             win->ResetConstraints();
2517         node = node->GetNext();
2518     }
2519 }
2520
2521 // Need to distinguish between setting the 'fake' size for windows and sizers,
2522 // and setting the real values.
2523 void wxWindowBase::SetConstraintSizes(bool recurse)
2524 {
2525     wxLayoutConstraints *constr = GetConstraints();
2526     if ( constr && constr->AreSatisfied() )
2527     {
2528         int x = constr->left.GetValue();
2529         int y = constr->top.GetValue();
2530         int w = constr->width.GetValue();
2531         int h = constr->height.GetValue();
2532
2533         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2534              (constr->height.GetRelationship() != wxAsIs) )
2535         {
2536             // We really shouldn't set negative sizes for the windows so make
2537             // them at least of 1*1 size
2538             SetSize(x, y, w > 0 ? w : 1, h > 0 ? h : 1);
2539         }
2540         else
2541         {
2542             // If we don't want to resize this window, just move it...
2543             Move(x, y);
2544         }
2545     }
2546     else if ( constr )
2547     {
2548         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2549                    GetClassInfo()->GetClassName(),
2550                    GetName().c_str());
2551     }
2552
2553     if ( recurse )
2554     {
2555         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2556         while (node)
2557         {
2558             wxWindow *win = node->GetData();
2559             if ( !win->IsTopLevel() && win->GetConstraints() )
2560                 win->SetConstraintSizes();
2561             node = node->GetNext();
2562         }
2563     }
2564 }
2565
2566 // Only set the size/position of the constraint (if any)
2567 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2568 {
2569     wxLayoutConstraints *constr = GetConstraints();
2570     if ( constr )
2571     {
2572         if ( x != wxDefaultCoord )
2573         {
2574             constr->left.SetValue(x);
2575             constr->left.SetDone(true);
2576         }
2577         if ( y != wxDefaultCoord )
2578         {
2579             constr->top.SetValue(y);
2580             constr->top.SetDone(true);
2581         }
2582         if ( w != wxDefaultCoord )
2583         {
2584             constr->width.SetValue(w);
2585             constr->width.SetDone(true);
2586         }
2587         if ( h != wxDefaultCoord )
2588         {
2589             constr->height.SetValue(h);
2590             constr->height.SetDone(true);
2591         }
2592     }
2593 }
2594
2595 void wxWindowBase::MoveConstraint(int x, int y)
2596 {
2597     wxLayoutConstraints *constr = GetConstraints();
2598     if ( constr )
2599     {
2600         if ( x != wxDefaultCoord )
2601         {
2602             constr->left.SetValue(x);
2603             constr->left.SetDone(true);
2604         }
2605         if ( y != wxDefaultCoord )
2606         {
2607             constr->top.SetValue(y);
2608             constr->top.SetDone(true);
2609         }
2610     }
2611 }
2612
2613 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2614 {
2615     wxLayoutConstraints *constr = GetConstraints();
2616     if ( constr )
2617     {
2618         *w = constr->width.GetValue();
2619         *h = constr->height.GetValue();
2620     }
2621     else
2622         GetSize(w, h);
2623 }
2624
2625 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2626 {
2627     wxLayoutConstraints *constr = GetConstraints();
2628     if ( constr )
2629     {
2630         *w = constr->width.GetValue();
2631         *h = constr->height.GetValue();
2632     }
2633     else
2634         GetClientSize(w, h);
2635 }
2636
2637 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2638 {
2639     wxLayoutConstraints *constr = GetConstraints();
2640     if ( constr )
2641     {
2642         *x = constr->left.GetValue();
2643         *y = constr->top.GetValue();
2644     }
2645     else
2646         GetPosition(x, y);
2647 }
2648
2649 #endif // wxUSE_CONSTRAINTS
2650
2651 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2652 {
2653     wxWindow *parent = GetParent();
2654     if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2655     {
2656         wxPoint pt(parent->GetClientAreaOrigin());
2657         x += pt.x;
2658         y += pt.y;
2659     }
2660 }
2661
2662 // ----------------------------------------------------------------------------
2663 // Update UI processing
2664 // ----------------------------------------------------------------------------
2665
2666 void wxWindowBase::UpdateWindowUI(long flags)
2667 {
2668     wxUpdateUIEvent event(GetId());
2669     event.SetEventObject(this);
2670
2671     if ( GetEventHandler()->ProcessEvent(event) )
2672     {
2673         DoUpdateWindowUI(event);
2674     }
2675
2676     if (flags & wxUPDATE_UI_RECURSE)
2677     {
2678         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2679         while (node)
2680         {
2681             wxWindow* child = (wxWindow*) node->GetData();
2682             child->UpdateWindowUI(flags);
2683             node = node->GetNext();
2684         }
2685     }
2686 }
2687
2688 // do the window-specific processing after processing the update event
2689 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2690 {
2691     if ( event.GetSetEnabled() )
2692         Enable(event.GetEnabled());
2693
2694     if ( event.GetSetShown() )
2695         Show(event.GetShown());
2696 }
2697
2698 // ----------------------------------------------------------------------------
2699 // Idle processing
2700 // ----------------------------------------------------------------------------
2701
2702 // Send idle event to window and all subwindows
2703 bool wxWindowBase::SendIdleEvents(wxIdleEvent& event)
2704 {
2705     bool needMore = false;
2706
2707     OnInternalIdle();
2708
2709     // should we send idle event to this window?
2710     if (wxIdleEvent::GetMode() == wxIDLE_PROCESS_ALL ||
2711         HasExtraStyle(wxWS_EX_PROCESS_IDLE))
2712     {
2713         event.SetEventObject(this);
2714         HandleWindowEvent(event);
2715
2716         if (event.MoreRequested())
2717             needMore = true;
2718     }
2719     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2720     for (; node; node = node->GetNext())
2721     {
2722         wxWindow* child = node->GetData();
2723         if (child->SendIdleEvents(event))
2724             needMore = true;
2725     }
2726
2727     return needMore;
2728 }
2729
2730 void wxWindowBase::OnInternalIdle()
2731 {
2732     if ( wxUpdateUIEvent::CanUpdate(this) )
2733         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
2734 }
2735
2736 // ----------------------------------------------------------------------------
2737 // dialog units translations
2738 // ----------------------------------------------------------------------------
2739
2740 // Windows' computes dialog units using average character width over upper-
2741 // and lower-case ASCII alphabet and not using the average character width
2742 // metadata stored in the font; see
2743 // http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion.
2744 // It's important that we perform the conversion in identical way, because
2745 // dialog units natively exist only on Windows and Windows HIG is expressed
2746 // using them.
2747 wxSize wxWindowBase::GetDlgUnitBase() const
2748 {
2749     const wxWindowBase * const parent = wxGetTopLevelParent((wxWindow*)this);
2750
2751     if ( !parent->m_font.IsOk() )
2752     {
2753         // Default GUI font is used. This is the most common case, so
2754         // cache the results.
2755         static wxSize s_defFontSize;
2756         if ( s_defFontSize.x == 0 )
2757             s_defFontSize = wxPrivate::GetAverageASCIILetterSize(*parent);
2758         return s_defFontSize;
2759     }
2760     else
2761     {
2762         // Custom font, we always need to compute the result
2763         return wxPrivate::GetAverageASCIILetterSize(*parent);
2764     }
2765 }
2766
2767 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt) const
2768 {
2769     const wxSize base = GetDlgUnitBase();
2770
2771     // NB: wxMulDivInt32() is used, because it correctly rounds the result
2772
2773     wxPoint pt2 = wxDefaultPosition;
2774     if (pt.x != wxDefaultCoord)
2775         pt2.x = wxMulDivInt32(pt.x, 4, base.x);
2776     if (pt.y != wxDefaultCoord)
2777         pt2.y = wxMulDivInt32(pt.y, 8, base.y);
2778
2779     return pt2;
2780 }
2781
2782 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt) const
2783 {
2784     const wxSize base = GetDlgUnitBase();
2785
2786     wxPoint pt2 = wxDefaultPosition;
2787     if (pt.x != wxDefaultCoord)
2788         pt2.x = wxMulDivInt32(pt.x, base.x, 4);
2789     if (pt.y != wxDefaultCoord)
2790         pt2.y = wxMulDivInt32(pt.y, base.y, 8);
2791
2792     return pt2;
2793 }
2794
2795 // ----------------------------------------------------------------------------
2796 // event handlers
2797 // ----------------------------------------------------------------------------
2798
2799 // propagate the colour change event to the subwindows
2800 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
2801 {
2802     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2803     while ( node )
2804     {
2805         // Only propagate to non-top-level windows
2806         wxWindow *win = node->GetData();
2807         if ( !win->IsTopLevel() )
2808         {
2809             wxSysColourChangedEvent event2;
2810             event2.SetEventObject(win);
2811             win->GetEventHandler()->ProcessEvent(event2);
2812         }
2813
2814         node = node->GetNext();
2815     }
2816
2817     Refresh();
2818 }
2819
2820 // the default action is to populate dialog with data when it's created,
2821 // and nudge the UI into displaying itself correctly in case
2822 // we've turned the wxUpdateUIEvents frequency down low.
2823 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2824 {
2825     TransferDataToWindow();
2826
2827     // Update the UI at this point
2828     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2829 }
2830
2831 // ----------------------------------------------------------------------------
2832 // menu-related functions
2833 // ----------------------------------------------------------------------------
2834
2835 #if wxUSE_MENUS
2836
2837 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2838 {
2839     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2840
2841     wxMenuInvokingWindowSetter
2842         setInvokingWin(*menu, static_cast<wxWindow *>(this));
2843
2844     wxCurrentPopupMenu = menu;
2845     const bool rc = DoPopupMenu(menu, x, y);
2846     wxCurrentPopupMenu = NULL;
2847
2848     return rc;
2849 }
2850
2851 // this is used to pass the id of the selected item from the menu event handler
2852 // to the main function itself
2853 //
2854 // it's ok to use a global here as there can be at most one popup menu shown at
2855 // any time
2856 static int gs_popupMenuSelection = wxID_NONE;
2857
2858 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2859 {
2860     // store the id in a global variable where we'll retrieve it from later
2861     gs_popupMenuSelection = event.GetId();
2862 }
2863
2864 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2865 {
2866     // nothing to do but do not skip it
2867 }
2868
2869 int
2870 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2871 {
2872     gs_popupMenuSelection = wxID_NONE;
2873
2874     Connect(wxEVT_COMMAND_MENU_SELECTED,
2875             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2876             NULL,
2877             this);
2878
2879     // it is common to construct the menu passed to this function dynamically
2880     // using some fixed range of ids which could clash with the ids used
2881     // elsewhere in the program, which could result in some menu items being
2882     // unintentionally disabled or otherwise modified by update UI handlers
2883     // elsewhere in the program code and this is difficult to avoid in the
2884     // program itself, so instead we just temporarily suspend UI updating while
2885     // this menu is shown
2886     Connect(wxEVT_UPDATE_UI,
2887             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2888             NULL,
2889             this);
2890
2891     PopupMenu(&menu, x, y);
2892
2893     Disconnect(wxEVT_UPDATE_UI,
2894                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2895                NULL,
2896                this);
2897     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2898                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2899                NULL,
2900                this);
2901
2902     return gs_popupMenuSelection;
2903 }
2904
2905 #endif // wxUSE_MENUS
2906
2907 // methods for drawing the sizers in a visible way: this is currently only
2908 // enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
2909 // that well and also because we don't want to leave it enabled in default
2910 // builds used for production
2911 #if wxDEBUG_LEVEL > 1
2912
2913 static void DrawSizers(wxWindowBase *win);
2914
2915 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2916 {
2917     wxClientDC dc((wxWindow *)win);
2918     dc.SetPen(*pen);
2919     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2920                        *wxTRANSPARENT_BRUSH);
2921     dc.DrawRectangle(rect.Deflate(1, 1));
2922 }
2923
2924 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2925 {
2926     const wxSizerItemList& items = sizer->GetChildren();
2927     for ( wxSizerItemList::const_iterator i = items.begin(),
2928                                         end = items.end();
2929           i != end;
2930           ++i )
2931     {
2932         wxSizerItem *item = *i;
2933         if ( item->IsSizer() )
2934         {
2935             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2936             DrawSizer(win, item->GetSizer());
2937         }
2938         else if ( item->IsSpacer() )
2939         {
2940             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2941         }
2942         else if ( item->IsWindow() )
2943         {
2944             DrawSizers(item->GetWindow());
2945         }
2946         else
2947             wxFAIL_MSG("inconsistent wxSizerItem status!");
2948     }
2949 }
2950
2951 static void DrawSizers(wxWindowBase *win)
2952 {
2953     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2954
2955     wxSizer *sizer = win->GetSizer();
2956     if ( sizer )
2957     {
2958         DrawSizer(win, sizer);
2959     }
2960     else // no sizer, still recurse into the children
2961     {
2962         const wxWindowList& children = win->GetChildren();
2963         for ( wxWindowList::const_iterator i = children.begin(),
2964                                          end = children.end();
2965               i != end;
2966               ++i )
2967         {
2968             DrawSizers(*i);
2969         }
2970
2971         // show all kind of sizes of this window; see the "window sizing" topic
2972         // overview for more info about the various differences:
2973         wxSize fullSz = win->GetSize();
2974         wxSize clientSz = win->GetClientSize();
2975         wxSize bestSz = win->GetBestSize();
2976         wxSize minSz = win->GetMinSize();
2977         wxSize maxSz = win->GetMaxSize();
2978         wxSize virtualSz = win->GetVirtualSize();
2979
2980         wxMessageOutputDebug dbgout;
2981         dbgout.Printf(
2982             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
2983             win->GetName(),
2984             fullSz.x, fullSz.y,
2985             clientSz.x, clientSz.y,
2986             bestSz.x, bestSz.y,
2987             minSz.x, minSz.y,
2988             maxSz.x, maxSz.y,
2989             virtualSz.x, virtualSz.y);
2990     }
2991 }
2992
2993 #endif // wxDEBUG_LEVEL
2994
2995 // process special middle clicks
2996 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
2997 {
2998     if ( event.ControlDown() && event.AltDown() )
2999     {
3000 #if wxDEBUG_LEVEL > 1
3001         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
3002         if ( event.ShiftDown() )
3003         {
3004             DrawSizers(this);
3005         }
3006         else
3007 #endif // __WXDEBUG__
3008         {
3009 #if wxUSE_MSGDLG
3010             // just Ctrl-Alt-middle click shows information about wx version
3011             ::wxInfoMessageBox((wxWindow*)this);
3012 #endif // wxUSE_MSGDLG
3013         }
3014     }
3015     else
3016     {
3017         event.Skip();
3018     }
3019 }
3020
3021 // ----------------------------------------------------------------------------
3022 // accessibility
3023 // ----------------------------------------------------------------------------
3024
3025 #if wxUSE_ACCESSIBILITY
3026 void wxWindowBase::SetAccessible(wxAccessible* accessible)
3027 {
3028     if (m_accessible && (accessible != m_accessible))
3029         delete m_accessible;
3030     m_accessible = accessible;
3031     if (m_accessible)
3032         m_accessible->SetWindow((wxWindow*) this);
3033 }
3034
3035 // Returns the accessible object, creating if necessary.
3036 wxAccessible* wxWindowBase::GetOrCreateAccessible()
3037 {
3038     if (!m_accessible)
3039         m_accessible = CreateAccessible();
3040     return m_accessible;
3041 }
3042
3043 // Override to create a specific accessible object.
3044 wxAccessible* wxWindowBase::CreateAccessible()
3045 {
3046     return new wxWindowAccessible((wxWindow*) this);
3047 }
3048
3049 #endif
3050
3051 // ----------------------------------------------------------------------------
3052 // list classes implementation
3053 // ----------------------------------------------------------------------------
3054
3055 #if wxUSE_STD_CONTAINERS
3056
3057 #include "wx/listimpl.cpp"
3058 WX_DEFINE_LIST(wxWindowList)
3059
3060 #else // !wxUSE_STD_CONTAINERS
3061
3062 void wxWindowListNode::DeleteData()
3063 {
3064     delete (wxWindow *)GetData();
3065 }
3066
3067 #endif // wxUSE_STD_CONTAINERS/!wxUSE_STD_CONTAINERS
3068
3069 // ----------------------------------------------------------------------------
3070 // borders
3071 // ----------------------------------------------------------------------------
3072
3073 wxBorder wxWindowBase::GetBorder(long flags) const
3074 {
3075     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
3076     if ( border == wxBORDER_DEFAULT )
3077     {
3078         border = GetDefaultBorder();
3079     }
3080     else if ( border == wxBORDER_THEME )
3081     {
3082         border = GetDefaultBorderForControl();
3083     }
3084
3085     return border;
3086 }
3087
3088 wxBorder wxWindowBase::GetDefaultBorder() const
3089 {
3090     return wxBORDER_NONE;
3091 }
3092
3093 // ----------------------------------------------------------------------------
3094 // hit testing
3095 // ----------------------------------------------------------------------------
3096
3097 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
3098 {
3099     // here we just check if the point is inside the window or not
3100
3101     // check the top and left border first
3102     bool outside = x < 0 || y < 0;
3103     if ( !outside )
3104     {
3105         // check the right and bottom borders too
3106         wxSize size = GetSize();
3107         outside = x >= size.x || y >= size.y;
3108     }
3109
3110     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
3111 }
3112
3113 // ----------------------------------------------------------------------------
3114 // mouse capture
3115 // ----------------------------------------------------------------------------
3116
3117 struct WXDLLEXPORT wxWindowNext
3118 {
3119     wxWindow *win;
3120     wxWindowNext *next;
3121 } *wxWindowBase::ms_winCaptureNext = NULL;
3122 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
3123 bool wxWindowBase::ms_winCaptureChanging = false;
3124
3125 void wxWindowBase::CaptureMouse()
3126 {
3127     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
3128
3129     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
3130
3131     ms_winCaptureChanging = true;
3132
3133     wxWindow *winOld = GetCapture();
3134     if ( winOld )
3135     {
3136         ((wxWindowBase*) winOld)->DoReleaseMouse();
3137
3138         // save it on stack
3139         wxWindowNext *item = new wxWindowNext;
3140         item->win = winOld;
3141         item->next = ms_winCaptureNext;
3142         ms_winCaptureNext = item;
3143     }
3144     //else: no mouse capture to save
3145
3146     DoCaptureMouse();
3147     ms_winCaptureCurrent = (wxWindow*)this;
3148
3149     ms_winCaptureChanging = false;
3150 }
3151
3152 void wxWindowBase::ReleaseMouse()
3153 {
3154     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
3155
3156     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
3157
3158     wxASSERT_MSG( GetCapture() == this,
3159                   "attempt to release mouse, but this window hasn't captured it" );
3160     wxASSERT_MSG( ms_winCaptureCurrent == this,
3161                   "attempt to release mouse, but this window hasn't captured it" );
3162
3163     ms_winCaptureChanging = true;
3164
3165     DoReleaseMouse();
3166     ms_winCaptureCurrent = NULL;
3167
3168     if ( ms_winCaptureNext )
3169     {
3170         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
3171         ms_winCaptureCurrent = ms_winCaptureNext->win;
3172
3173         wxWindowNext *item = ms_winCaptureNext;
3174         ms_winCaptureNext = item->next;
3175         delete item;
3176     }
3177     //else: stack is empty, no previous capture
3178
3179     ms_winCaptureChanging = false;
3180
3181     wxLogTrace(wxT("mousecapture"),
3182         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
3183         static_cast<void*>(GetCapture()));
3184 }
3185
3186 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
3187 {
3188     wxMouseCaptureLostEvent event(win->GetId());
3189     event.SetEventObject(win);
3190     if ( !win->GetEventHandler()->ProcessEvent(event) )
3191     {
3192         // windows must handle this event, otherwise the app wouldn't behave
3193         // correctly if it loses capture unexpectedly; see the discussion here:
3194         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
3195         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
3196         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
3197     }
3198 }
3199
3200 /* static */
3201 void wxWindowBase::NotifyCaptureLost()
3202 {
3203     // don't do anything if capture lost was expected, i.e. resulted from
3204     // a wx call to ReleaseMouse or CaptureMouse:
3205     if ( ms_winCaptureChanging )
3206         return;
3207
3208     // if the capture was lost unexpectedly, notify every window that has
3209     // capture (on stack or current) about it and clear the stack:
3210
3211     if ( ms_winCaptureCurrent )
3212     {
3213         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
3214         ms_winCaptureCurrent = NULL;
3215     }
3216
3217     while ( ms_winCaptureNext )
3218     {
3219         wxWindowNext *item = ms_winCaptureNext;
3220         ms_winCaptureNext = item->next;
3221
3222         DoNotifyWindowAboutCaptureLost(item->win);
3223
3224         delete item;
3225     }
3226 }
3227
3228 #if wxUSE_HOTKEY
3229
3230 bool
3231 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
3232                              int WXUNUSED(modifiers),
3233                              int WXUNUSED(keycode))
3234 {
3235     // not implemented
3236     return false;
3237 }
3238
3239 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
3240 {
3241     // not implemented
3242     return false;
3243 }
3244
3245 #endif // wxUSE_HOTKEY
3246
3247 // ----------------------------------------------------------------------------
3248 // event processing
3249 // ----------------------------------------------------------------------------
3250
3251 bool wxWindowBase::TryBefore(wxEvent& event)
3252 {
3253 #if wxUSE_VALIDATORS
3254     // Can only use the validator of the window which
3255     // is receiving the event
3256     if ( event.GetEventObject() == this )
3257     {
3258         wxValidator * const validator = GetValidator();
3259         if ( validator && validator->ProcessEventLocally(event) )
3260         {
3261             return true;
3262         }
3263     }
3264 #endif // wxUSE_VALIDATORS
3265
3266     return wxEvtHandler::TryBefore(event);
3267 }
3268
3269 bool wxWindowBase::TryAfter(wxEvent& event)
3270 {
3271     // carry on up the parent-child hierarchy if the propagation count hasn't
3272     // reached zero yet
3273     if ( event.ShouldPropagate() )
3274     {
3275         // honour the requests to stop propagation at this window: this is
3276         // used by the dialogs, for example, to prevent processing the events
3277         // from the dialog controls in the parent frame which rarely, if ever,
3278         // makes sense
3279         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
3280         {
3281             wxWindow *parent = GetParent();
3282             if ( parent && !parent->IsBeingDeleted() )
3283             {
3284                 wxPropagateOnce propagateOnce(event);
3285
3286                 return parent->GetEventHandler()->ProcessEvent(event);
3287             }
3288         }
3289     }
3290
3291     return wxEvtHandler::TryAfter(event);
3292 }
3293
3294 // ----------------------------------------------------------------------------
3295 // window relationships
3296 // ----------------------------------------------------------------------------
3297
3298 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
3299 {
3300     wxCHECK_MSG( GetParent(), NULL,
3301                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
3302
3303     wxWindowList& siblings = GetParent()->GetChildren();
3304     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
3305     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
3306
3307     if ( order == OrderBefore )
3308         i = i->GetPrevious();
3309     else // OrderAfter
3310         i = i->GetNext();
3311
3312     return i ? i->GetData() : NULL;
3313 }
3314
3315 // ----------------------------------------------------------------------------
3316 // keyboard navigation
3317 // ----------------------------------------------------------------------------
3318
3319 // Navigates in the specified direction inside this window
3320 bool wxWindowBase::DoNavigateIn(int flags)
3321 {
3322 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
3323     // native code doesn't process our wxNavigationKeyEvents anyhow
3324     wxUnusedVar(flags);
3325     return false;
3326 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
3327     wxNavigationKeyEvent eventNav;
3328     wxWindow *focused = FindFocus();
3329     eventNav.SetCurrentFocus(focused);
3330     eventNav.SetEventObject(focused);
3331     eventNav.SetFlags(flags);
3332     return GetEventHandler()->ProcessEvent(eventNav);
3333 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
3334 }
3335
3336 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
3337 {
3338     if ( event.GetKeyCode() != WXK_TAB )
3339         return false;
3340
3341     int flags = wxNavigationKeyEvent::FromTab;
3342
3343     if ( event.ShiftDown() )
3344         flags |= wxNavigationKeyEvent::IsBackward;
3345     else
3346         flags |= wxNavigationKeyEvent::IsForward;
3347
3348     if ( event.ControlDown() )
3349         flags |= wxNavigationKeyEvent::WinChange;
3350
3351     Navigate(flags);
3352     return true;
3353 }
3354
3355 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
3356 {
3357     // check that we're not a top level window
3358     wxCHECK_RET( GetParent(),
3359                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
3360
3361     // detect the special case when we have nothing to do anyhow and when the
3362     // code below wouldn't work
3363     if ( win == this )
3364         return;
3365
3366     // find the target window in the siblings list
3367     wxWindowList& siblings = GetParent()->GetChildren();
3368     wxWindowList::compatibility_iterator i = siblings.Find(win);
3369     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3370
3371     // unfortunately, when wxUSE_STD_CONTAINERS == 1 DetachNode() is not
3372     // implemented so we can't just move the node around
3373     wxWindow *self = (wxWindow *)this;
3374     siblings.DeleteObject(self);
3375     if ( move == OrderAfter )
3376     {
3377         i = i->GetNext();
3378     }
3379
3380     if ( i )
3381     {
3382         siblings.Insert(i, self);
3383     }
3384     else // OrderAfter and win was the last sibling
3385     {
3386         siblings.Append(self);
3387     }
3388 }
3389
3390 // ----------------------------------------------------------------------------
3391 // focus handling
3392 // ----------------------------------------------------------------------------
3393
3394 /*static*/ wxWindow* wxWindowBase::FindFocus()
3395 {
3396     wxWindowBase *win = DoFindFocus();
3397     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3398 }
3399
3400 bool wxWindowBase::HasFocus() const
3401 {
3402     wxWindowBase* const win = DoFindFocus();
3403     return win &&
3404             (this == win || this == win->GetMainWindowOfCompositeControl());
3405 }
3406
3407 // ----------------------------------------------------------------------------
3408 // drag and drop
3409 // ----------------------------------------------------------------------------
3410
3411 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3412
3413 namespace
3414 {
3415
3416 class DragAcceptFilesTarget : public wxFileDropTarget
3417 {
3418 public:
3419     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3420
3421     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3422                              const wxArrayString& filenames)
3423     {
3424         wxDropFilesEvent event(wxEVT_DROP_FILES,
3425                                filenames.size(),
3426                                wxCArrayString(filenames).Release());
3427         event.SetEventObject(m_win);
3428         event.m_pos.x = x;
3429         event.m_pos.y = y;
3430
3431         return m_win->HandleWindowEvent(event);
3432     }
3433
3434 private:
3435     wxWindowBase * const m_win;
3436
3437     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3438 };
3439
3440
3441 } // anonymous namespace
3442
3443 // Generic version of DragAcceptFiles(). It works by installing a simple
3444 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3445 // together with explicit SetDropTarget() calls.
3446 void wxWindowBase::DragAcceptFiles(bool accept)
3447 {
3448     if ( accept )
3449     {
3450         wxASSERT_MSG( !GetDropTarget(),
3451                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3452         SetDropTarget(new DragAcceptFilesTarget(this));
3453     }
3454     else
3455     {
3456         SetDropTarget(NULL);
3457     }
3458 }
3459
3460 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3461
3462 // ----------------------------------------------------------------------------
3463 // global functions
3464 // ----------------------------------------------------------------------------
3465
3466 wxWindow* wxGetTopLevelParent(wxWindow *win)
3467 {
3468     while ( win && !win->IsTopLevel() )
3469          win = win->GetParent();
3470
3471     return win;
3472 }
3473
3474 #if wxUSE_ACCESSIBILITY
3475 // ----------------------------------------------------------------------------
3476 // accessible object for windows
3477 // ----------------------------------------------------------------------------
3478
3479 // Can return either a child object, or an integer
3480 // representing the child element, starting from 1.
3481 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3482 {
3483     wxASSERT( GetWindow() != NULL );
3484     if (!GetWindow())
3485         return wxACC_FAIL;
3486
3487     return wxACC_NOT_IMPLEMENTED;
3488 }
3489
3490 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3491 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3492 {
3493     wxASSERT( GetWindow() != NULL );
3494     if (!GetWindow())
3495         return wxACC_FAIL;
3496
3497     wxWindow* win = NULL;
3498     if (elementId == 0)
3499     {
3500         win = GetWindow();
3501     }
3502     else
3503     {
3504         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3505         {
3506             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3507         }
3508         else
3509             return wxACC_FAIL;
3510     }
3511     if (win)
3512     {
3513         rect = win->GetRect();
3514         if (win->GetParent() && !win->IsKindOf(CLASSINFO(wxTopLevelWindow)))
3515             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3516         return wxACC_OK;
3517     }
3518
3519     return wxACC_NOT_IMPLEMENTED;
3520 }
3521
3522 // Navigates from fromId to toId/toObject.
3523 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3524                              int* WXUNUSED(toId), wxAccessible** toObject)
3525 {
3526     wxASSERT( GetWindow() != NULL );
3527     if (!GetWindow())
3528         return wxACC_FAIL;
3529
3530     switch (navDir)
3531     {
3532     case wxNAVDIR_FIRSTCHILD:
3533         {
3534             if (GetWindow()->GetChildren().GetCount() == 0)
3535                 return wxACC_FALSE;
3536             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3537             *toObject = childWindow->GetOrCreateAccessible();
3538
3539             return wxACC_OK;
3540         }
3541     case wxNAVDIR_LASTCHILD:
3542         {
3543             if (GetWindow()->GetChildren().GetCount() == 0)
3544                 return wxACC_FALSE;
3545             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3546             *toObject = childWindow->GetOrCreateAccessible();
3547
3548             return wxACC_OK;
3549         }
3550     case wxNAVDIR_RIGHT:
3551     case wxNAVDIR_DOWN:
3552     case wxNAVDIR_NEXT:
3553         {
3554             wxWindowList::compatibility_iterator node =
3555                 wxWindowList::compatibility_iterator();
3556             if (fromId == 0)
3557             {
3558                 // Can't navigate to sibling of this window
3559                 // if we're a top-level window.
3560                 if (!GetWindow()->GetParent())
3561                     return wxACC_NOT_IMPLEMENTED;
3562
3563                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3564             }
3565             else
3566             {
3567                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3568                     node = GetWindow()->GetChildren().Item(fromId-1);
3569             }
3570
3571             if (node && node->GetNext())
3572             {
3573                 wxWindow* nextWindow = node->GetNext()->GetData();
3574                 *toObject = nextWindow->GetOrCreateAccessible();
3575                 return wxACC_OK;
3576             }
3577             else
3578                 return wxACC_FALSE;
3579         }
3580     case wxNAVDIR_LEFT:
3581     case wxNAVDIR_UP:
3582     case wxNAVDIR_PREVIOUS:
3583         {
3584             wxWindowList::compatibility_iterator node =
3585                 wxWindowList::compatibility_iterator();
3586             if (fromId == 0)
3587             {
3588                 // Can't navigate to sibling of this window
3589                 // if we're a top-level window.
3590                 if (!GetWindow()->GetParent())
3591                     return wxACC_NOT_IMPLEMENTED;
3592
3593                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3594             }
3595             else
3596             {
3597                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3598                     node = GetWindow()->GetChildren().Item(fromId-1);
3599             }
3600
3601             if (node && node->GetPrevious())
3602             {
3603                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3604                 *toObject = previousWindow->GetOrCreateAccessible();
3605                 return wxACC_OK;
3606             }
3607             else
3608                 return wxACC_FALSE;
3609         }
3610     }
3611
3612     return wxACC_NOT_IMPLEMENTED;
3613 }
3614
3615 // Gets the name of the specified object.
3616 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3617 {
3618     wxASSERT( GetWindow() != NULL );
3619     if (!GetWindow())
3620         return wxACC_FAIL;
3621
3622     wxString title;
3623
3624     // If a child, leave wxWidgets to call the function on the actual
3625     // child object.
3626     if (childId > 0)
3627         return wxACC_NOT_IMPLEMENTED;
3628
3629     // This will eventually be replaced by specialised
3630     // accessible classes, one for each kind of wxWidgets
3631     // control or window.
3632 #if wxUSE_BUTTON
3633     if (GetWindow()->IsKindOf(CLASSINFO(wxButton)))
3634         title = ((wxButton*) GetWindow())->GetLabel();
3635     else
3636 #endif
3637         title = GetWindow()->GetName();
3638
3639     if (!title.empty())
3640     {
3641         *name = title;
3642         return wxACC_OK;
3643     }
3644     else
3645         return wxACC_NOT_IMPLEMENTED;
3646 }
3647
3648 // Gets the number of children.
3649 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3650 {
3651     wxASSERT( GetWindow() != NULL );
3652     if (!GetWindow())
3653         return wxACC_FAIL;
3654
3655     *childId = (int) GetWindow()->GetChildren().GetCount();
3656     return wxACC_OK;
3657 }
3658
3659 // Gets the specified child (starting from 1).
3660 // If *child is NULL and return value is wxACC_OK,
3661 // this means that the child is a simple element and
3662 // not an accessible object.
3663 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3664 {
3665     wxASSERT( GetWindow() != NULL );
3666     if (!GetWindow())
3667         return wxACC_FAIL;
3668
3669     if (childId == 0)
3670     {
3671         *child = this;
3672         return wxACC_OK;
3673     }
3674
3675     if (childId > (int) GetWindow()->GetChildren().GetCount())
3676         return wxACC_FAIL;
3677
3678     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3679     *child = childWindow->GetOrCreateAccessible();
3680     if (*child)
3681         return wxACC_OK;
3682     else
3683         return wxACC_FAIL;
3684 }
3685
3686 // Gets the parent, or NULL.
3687 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3688 {
3689     wxASSERT( GetWindow() != NULL );
3690     if (!GetWindow())
3691         return wxACC_FAIL;
3692
3693     wxWindow* parentWindow = GetWindow()->GetParent();
3694     if (!parentWindow)
3695     {
3696         *parent = NULL;
3697         return wxACC_OK;
3698     }
3699     else
3700     {
3701         *parent = parentWindow->GetOrCreateAccessible();
3702         if (*parent)
3703             return wxACC_OK;
3704         else
3705             return wxACC_FAIL;
3706     }
3707 }
3708
3709 // Performs the default action. childId is 0 (the action for this object)
3710 // or > 0 (the action for a child).
3711 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3712 // window (e.g. an edit control).
3713 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3714 {
3715     wxASSERT( GetWindow() != NULL );
3716     if (!GetWindow())
3717         return wxACC_FAIL;
3718
3719     return wxACC_NOT_IMPLEMENTED;
3720 }
3721
3722 // Gets the default action for this object (0) or > 0 (the action for a child).
3723 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3724 // string if there is no action.
3725 // The retrieved string describes the action that is performed on an object,
3726 // not what the object does as a result. For example, a toolbar button that prints
3727 // a document has a default action of "Press" rather than "Prints the current document."
3728 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3729 {
3730     wxASSERT( GetWindow() != NULL );
3731     if (!GetWindow())
3732         return wxACC_FAIL;
3733
3734     return wxACC_NOT_IMPLEMENTED;
3735 }
3736
3737 // Returns the description for this object or a child.
3738 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3739 {
3740     wxASSERT( GetWindow() != NULL );
3741     if (!GetWindow())
3742         return wxACC_FAIL;
3743
3744     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3745     if (!ht.empty())
3746     {
3747         *description = ht;
3748         return wxACC_OK;
3749     }
3750     return wxACC_NOT_IMPLEMENTED;
3751 }
3752
3753 // Returns help text for this object or a child, similar to tooltip text.
3754 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3755 {
3756     wxASSERT( GetWindow() != NULL );
3757     if (!GetWindow())
3758         return wxACC_FAIL;
3759
3760     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3761     if (!ht.empty())
3762     {
3763         *helpText = ht;
3764         return wxACC_OK;
3765     }
3766     return wxACC_NOT_IMPLEMENTED;
3767 }
3768
3769 // Returns the keyboard shortcut for this object or child.
3770 // Return e.g. ALT+K
3771 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3772 {
3773     wxASSERT( GetWindow() != NULL );
3774     if (!GetWindow())
3775         return wxACC_FAIL;
3776
3777     return wxACC_NOT_IMPLEMENTED;
3778 }
3779
3780 // Returns a role constant.
3781 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3782 {
3783     wxASSERT( GetWindow() != NULL );
3784     if (!GetWindow())
3785         return wxACC_FAIL;
3786
3787     // If a child, leave wxWidgets to call the function on the actual
3788     // child object.
3789     if (childId > 0)
3790         return wxACC_NOT_IMPLEMENTED;
3791
3792     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3793         return wxACC_NOT_IMPLEMENTED;
3794 #if wxUSE_STATUSBAR
3795     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3796         return wxACC_NOT_IMPLEMENTED;
3797 #endif
3798 #if wxUSE_TOOLBAR
3799     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3800         return wxACC_NOT_IMPLEMENTED;
3801 #endif
3802
3803     //*role = wxROLE_SYSTEM_CLIENT;
3804     *role = wxROLE_SYSTEM_CLIENT;
3805     return wxACC_OK;
3806
3807     #if 0
3808     return wxACC_NOT_IMPLEMENTED;
3809     #endif
3810 }
3811
3812 // Returns a state constant.
3813 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3814 {
3815     wxASSERT( GetWindow() != NULL );
3816     if (!GetWindow())
3817         return wxACC_FAIL;
3818
3819     // If a child, leave wxWidgets to call the function on the actual
3820     // child object.
3821     if (childId > 0)
3822         return wxACC_NOT_IMPLEMENTED;
3823
3824     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3825         return wxACC_NOT_IMPLEMENTED;
3826
3827 #if wxUSE_STATUSBAR
3828     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3829         return wxACC_NOT_IMPLEMENTED;
3830 #endif
3831 #if wxUSE_TOOLBAR
3832     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3833         return wxACC_NOT_IMPLEMENTED;
3834 #endif
3835
3836     *state = 0;
3837     return wxACC_OK;
3838
3839     #if 0
3840     return wxACC_NOT_IMPLEMENTED;
3841     #endif
3842 }
3843
3844 // Returns a localized string representing the value for the object
3845 // or child.
3846 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3847 {
3848     wxASSERT( GetWindow() != NULL );
3849     if (!GetWindow())
3850         return wxACC_FAIL;
3851
3852     return wxACC_NOT_IMPLEMENTED;
3853 }
3854
3855 // Selects the object or child.
3856 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3857 {
3858     wxASSERT( GetWindow() != NULL );
3859     if (!GetWindow())
3860         return wxACC_FAIL;
3861
3862     return wxACC_NOT_IMPLEMENTED;
3863 }
3864
3865 // Gets the window with the keyboard focus.
3866 // If childId is 0 and child is NULL, no object in
3867 // this subhierarchy has the focus.
3868 // If this object has the focus, child should be 'this'.
3869 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3870 {
3871     wxASSERT( GetWindow() != NULL );
3872     if (!GetWindow())
3873         return wxACC_FAIL;
3874
3875     return wxACC_NOT_IMPLEMENTED;
3876 }
3877
3878 #if wxUSE_VARIANT
3879 // Gets a variant representing the selected children
3880 // of this object.
3881 // Acceptable values:
3882 // - a null variant (IsNull() returns true)
3883 // - a list variant (GetType() == wxT("list")
3884 // - an integer representing the selected child element,
3885 //   or 0 if this object is selected (GetType() == wxT("long")
3886 // - a "void*" pointer to a wxAccessible child object
3887 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3888 {
3889     wxASSERT( GetWindow() != NULL );
3890     if (!GetWindow())
3891         return wxACC_FAIL;
3892
3893     return wxACC_NOT_IMPLEMENTED;
3894 }
3895 #endif // wxUSE_VARIANT
3896
3897 #endif // wxUSE_ACCESSIBILITY
3898
3899 // ----------------------------------------------------------------------------
3900 // RTL support
3901 // ----------------------------------------------------------------------------
3902
3903 wxCoord
3904 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3905                                        wxCoord width,
3906                                        wxCoord widthTotal) const
3907 {
3908     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3909     {
3910         x = widthTotal - x - width;
3911     }
3912
3913     return x;
3914 }
3915
3916