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             && !wxDynamicCast(win, 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         if ( win == this )
1272             return true;
1273
1274         // Stop iterating on reaching the top level window boundary.
1275         if ( win->IsTopLevel() )
1276             break;
1277
1278         win = win->GetParent();
1279     }
1280
1281     return false;
1282 }
1283
1284 void wxWindowBase::AddChild(wxWindowBase *child)
1285 {
1286     wxCHECK_RET( child, wxT("can't add a NULL child") );
1287
1288     // this should never happen and it will lead to a crash later if it does
1289     // because RemoveChild() will remove only one node from the children list
1290     // and the other(s) one(s) will be left with dangling pointers in them
1291     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), wxT("AddChild() called twice") );
1292
1293     GetChildren().Append((wxWindow*)child);
1294     child->SetParent(this);
1295
1296     // adding a child while frozen will assert when thawed, so freeze it as if
1297     // it had been already present when we were frozen
1298     if ( IsFrozen() && !child->IsTopLevel() )
1299         child->Freeze();
1300 }
1301
1302 void wxWindowBase::RemoveChild(wxWindowBase *child)
1303 {
1304     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1305
1306     // removing a child while frozen may result in permanently frozen window
1307     // if used e.g. from Reparent(), so thaw it
1308     //
1309     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1310     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1311     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1312         child->Thaw();
1313
1314     GetChildren().DeleteObject((wxWindow *)child);
1315     child->SetParent(NULL);
1316 }
1317
1318 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1319 {
1320     wxWindow *oldParent = GetParent();
1321     if ( newParent == oldParent )
1322     {
1323         // nothing done
1324         return false;
1325     }
1326
1327     const bool oldEnabledState = IsEnabled();
1328
1329     // unlink this window from the existing parent.
1330     if ( oldParent )
1331     {
1332         oldParent->RemoveChild(this);
1333     }
1334     else
1335     {
1336         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1337     }
1338
1339     // add it to the new one
1340     if ( newParent )
1341     {
1342         newParent->AddChild(this);
1343     }
1344     else
1345     {
1346         wxTopLevelWindows.Append((wxWindow *)this);
1347     }
1348
1349     // We need to notify window (and its subwindows) if by changing the parent
1350     // we also change our enabled/disabled status.
1351     const bool newEnabledState = IsEnabled();
1352     if ( newEnabledState != oldEnabledState )
1353     {
1354         NotifyWindowOnEnableChange(newEnabledState);
1355     }
1356
1357     return true;
1358 }
1359
1360 // ----------------------------------------------------------------------------
1361 // event handler stuff
1362 // ----------------------------------------------------------------------------
1363
1364 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1365 {
1366     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1367
1368     m_eventHandler = handler;
1369 }
1370
1371 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1372 {
1373     // disable wxEvtHandler chain mechanism for wxWindows:
1374     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1375
1376     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1377 }
1378 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1379 {
1380     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1381     // handler of our stack when is destroyed will be Unlink()ed and thus
1382     // will call this function to update the pointer of this window...
1383
1384     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1385 }
1386
1387 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1388 {
1389     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1390
1391     // the new handler is going to be part of the wxWindow stack of event handlers:
1392     // it can't be part also of an event handler double-linked chain:
1393     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1394         "The handler being pushed in the wxWindow stack shouldn't be part of "
1395         "a wxEvtHandler chain; call Unlink() on it first");
1396
1397     wxEvtHandler *handlerOld = GetEventHandler();
1398     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1399
1400     // now use wxEvtHandler double-linked list to implement a stack:
1401     handlerToPush->SetNextHandler(handlerOld);
1402
1403     if (handlerOld != this)
1404         handlerOld->SetPreviousHandler(handlerToPush);
1405
1406     SetEventHandler(handlerToPush);
1407
1408 #if wxDEBUG_LEVEL
1409     // final checks of the operations done above:
1410     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1411         "the first handler of the wxWindow stack should "
1412         "have no previous handlers set" );
1413     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1414         "the first handler of the wxWindow stack should "
1415         "have non-NULL next handler" );
1416
1417     wxEvtHandler* pLast = handlerToPush;
1418     while ( pLast && pLast != this )
1419         pLast = pLast->GetNextHandler();
1420     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1421         "the last handler of the wxWindow stack should "
1422         "have this window as next handler" );
1423 #endif // wxDEBUG_LEVEL
1424 }
1425
1426 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1427 {
1428     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1429
1430     wxEvtHandler *firstHandler = GetEventHandler();
1431     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1432     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1433     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1434         "the first handler of the wxWindow stack should have no previous handlers set" );
1435
1436     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1437     wxCHECK_MSG( secondHandler != NULL, NULL,
1438         "the first handler of the wxWindow stack should have non-NULL next handler" );
1439
1440     firstHandler->SetNextHandler(NULL);
1441
1442     // It is harmless but useless to unset the previous handler of the window
1443     // itself as it's always NULL anyhow, so don't do this.
1444     if ( secondHandler != this )
1445         secondHandler->SetPreviousHandler(NULL);
1446
1447     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1448     SetEventHandler(secondHandler);
1449
1450     if ( deleteHandler )
1451     {
1452         wxDELETE(firstHandler);
1453     }
1454
1455     return firstHandler;
1456 }
1457
1458 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1459 {
1460     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1461     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1462
1463     if (handlerToRemove == GetEventHandler())
1464     {
1465         // removing the first event handler is equivalent to "popping" the stack
1466         PopEventHandler(false);
1467         return true;
1468     }
1469
1470     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1471     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1472     while ( handlerCur != this && handlerCur )
1473     {
1474         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1475
1476         if ( handlerCur == handlerToRemove )
1477         {
1478             handlerCur->Unlink();
1479
1480             wxASSERT_MSG( handlerCur != GetEventHandler(),
1481                         "the case Remove == Pop should was already handled" );
1482             return true;
1483         }
1484
1485         handlerCur = handlerNext;
1486     }
1487
1488     wxFAIL_MSG( wxT("where has the event handler gone?") );
1489
1490     return false;
1491 }
1492
1493 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1494 {
1495     // SafelyProcessEvent() will handle exceptions nicely
1496     return GetEventHandler()->SafelyProcessEvent(event);
1497 }
1498
1499 // ----------------------------------------------------------------------------
1500 // colours, fonts &c
1501 // ----------------------------------------------------------------------------
1502
1503 void wxWindowBase::InheritAttributes()
1504 {
1505     const wxWindowBase * const parent = GetParent();
1506     if ( !parent )
1507         return;
1508
1509     // we only inherit attributes which had been explicitly set for the parent
1510     // which ensures that this only happens if the user really wants it and
1511     // not by default which wouldn't make any sense in modern GUIs where the
1512     // controls don't all use the same fonts (nor colours)
1513     if ( parent->m_inheritFont && !m_hasFont )
1514         SetFont(parent->GetFont());
1515
1516     // in addition, there is a possibility to explicitly forbid inheriting
1517     // colours at each class level by overriding ShouldInheritColours()
1518     if ( ShouldInheritColours() )
1519     {
1520         if ( parent->m_inheritFgCol && !m_hasFgCol )
1521             SetForegroundColour(parent->GetForegroundColour());
1522
1523         // inheriting (solid) background colour is wrong as it totally breaks
1524         // any kind of themed backgrounds
1525         //
1526         // instead, the controls should use the same background as their parent
1527         // (ideally by not drawing it at all)
1528 #if 0
1529         if ( parent->m_inheritBgCol && !m_hasBgCol )
1530             SetBackgroundColour(parent->GetBackgroundColour());
1531 #endif // 0
1532     }
1533 }
1534
1535 /* static */ wxVisualAttributes
1536 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1537 {
1538     // it is important to return valid values for all attributes from here,
1539     // GetXXX() below rely on this
1540     wxVisualAttributes attrs;
1541     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1542     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1543
1544     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1545     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1546     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1547     // colour on other platforms.
1548
1549 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1550     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1551 #else
1552     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1553 #endif
1554     return attrs;
1555 }
1556
1557 wxColour wxWindowBase::GetBackgroundColour() const
1558 {
1559     if ( !m_backgroundColour.IsOk() )
1560     {
1561         wxASSERT_MSG( !m_hasBgCol, wxT("we have invalid explicit bg colour?") );
1562
1563         // get our default background colour
1564         wxColour colBg = GetDefaultAttributes().colBg;
1565
1566         // we must return some valid colour to avoid redoing this every time
1567         // and also to avoid surprising the applications written for older
1568         // wxWidgets versions where GetBackgroundColour() always returned
1569         // something -- so give them something even if it doesn't make sense
1570         // for this window (e.g. it has a themed background)
1571         if ( !colBg.IsOk() )
1572             colBg = GetClassDefaultAttributes().colBg;
1573
1574         return colBg;
1575     }
1576     else
1577         return m_backgroundColour;
1578 }
1579
1580 wxColour wxWindowBase::GetForegroundColour() const
1581 {
1582     // logic is the same as above
1583     if ( !m_hasFgCol && !m_foregroundColour.IsOk() )
1584     {
1585         wxColour colFg = GetDefaultAttributes().colFg;
1586
1587         if ( !colFg.IsOk() )
1588             colFg = GetClassDefaultAttributes().colFg;
1589
1590         return colFg;
1591     }
1592     else
1593         return m_foregroundColour;
1594 }
1595
1596 bool wxWindowBase::SetBackgroundStyle(wxBackgroundStyle style)
1597 {
1598     // The checks below shouldn't be triggered if we're not really changing the
1599     // style.
1600     if ( style == m_backgroundStyle )
1601         return true;
1602
1603     // Transparent background style can be only set before creation because of
1604     // wxGTK limitation.
1605     wxCHECK_MSG( (style != wxBG_STYLE_TRANSPARENT) || !GetHandle(),
1606                  false,
1607                  "wxBG_STYLE_TRANSPARENT style can only be set before "
1608                  "Create()-ing the window." );
1609
1610     // And once it is set, wxBG_STYLE_TRANSPARENT can't be unset.
1611     wxCHECK_MSG( (m_backgroundStyle != wxBG_STYLE_TRANSPARENT) ||
1612                  (style == wxBG_STYLE_TRANSPARENT),
1613                  false,
1614                  "wxBG_STYLE_TRANSPARENT can't be unset once it was set." );
1615
1616     m_backgroundStyle = style;
1617
1618     return true;
1619 }
1620
1621 bool wxWindowBase::IsTransparentBackgroundSupported(wxString *reason) const
1622 {
1623     if ( reason )
1624         *reason = _("This platform does not support background transparency.");
1625
1626     return false;
1627 }
1628
1629 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1630 {
1631     if ( colour == m_backgroundColour )
1632         return false;
1633
1634     m_hasBgCol = colour.IsOk();
1635
1636     m_inheritBgCol = m_hasBgCol;
1637     m_backgroundColour = colour;
1638     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.IsOk() );
1639     return true;
1640 }
1641
1642 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1643 {
1644     if (colour == m_foregroundColour )
1645         return false;
1646
1647     m_hasFgCol = colour.IsOk();
1648     m_inheritFgCol = m_hasFgCol;
1649     m_foregroundColour = colour;
1650     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.IsOk() );
1651     return true;
1652 }
1653
1654 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1655 {
1656     // setting an invalid cursor is ok, it means that we don't have any special
1657     // cursor
1658     if ( m_cursor.IsSameAs(cursor) )
1659     {
1660         // no change
1661         return false;
1662     }
1663
1664     m_cursor = cursor;
1665
1666     return true;
1667 }
1668
1669 wxFont wxWindowBase::GetFont() const
1670 {
1671     // logic is the same as in GetBackgroundColour()
1672     if ( !m_font.IsOk() )
1673     {
1674         wxASSERT_MSG( !m_hasFont, wxT("we have invalid explicit font?") );
1675
1676         wxFont font = GetDefaultAttributes().font;
1677         if ( !font.IsOk() )
1678             font = GetClassDefaultAttributes().font;
1679
1680         return font;
1681     }
1682     else
1683         return m_font;
1684 }
1685
1686 bool wxWindowBase::SetFont(const wxFont& font)
1687 {
1688     if ( font == m_font )
1689     {
1690         // no change
1691         return false;
1692     }
1693
1694     m_font = font;
1695     m_hasFont = font.IsOk();
1696     m_inheritFont = m_hasFont;
1697
1698     InvalidateBestSize();
1699
1700     return true;
1701 }
1702
1703 #if wxUSE_PALETTE
1704
1705 void wxWindowBase::SetPalette(const wxPalette& pal)
1706 {
1707     m_hasCustomPalette = true;
1708     m_palette = pal;
1709
1710     // VZ: can anyone explain me what do we do here?
1711     wxWindowDC d((wxWindow *) this);
1712     d.SetPalette(pal);
1713 }
1714
1715 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1716 {
1717     wxWindow *win = (wxWindow *)this;
1718     while ( win && !win->HasCustomPalette() )
1719     {
1720         win = win->GetParent();
1721     }
1722
1723     return win;
1724 }
1725
1726 #endif // wxUSE_PALETTE
1727
1728 #if wxUSE_CARET
1729 void wxWindowBase::SetCaret(wxCaret *caret)
1730 {
1731     if ( m_caret )
1732     {
1733         delete m_caret;
1734     }
1735
1736     m_caret = caret;
1737
1738     if ( m_caret )
1739     {
1740         wxASSERT_MSG( m_caret->GetWindow() == this,
1741                       wxT("caret should be created associated to this window") );
1742     }
1743 }
1744 #endif // wxUSE_CARET
1745
1746 #if wxUSE_VALIDATORS
1747 // ----------------------------------------------------------------------------
1748 // validators
1749 // ----------------------------------------------------------------------------
1750
1751 void wxWindowBase::SetValidator(const wxValidator& validator)
1752 {
1753     if ( m_windowValidator )
1754         delete m_windowValidator;
1755
1756     m_windowValidator = (wxValidator *)validator.Clone();
1757
1758     if ( m_windowValidator )
1759         m_windowValidator->SetWindow(this);
1760 }
1761 #endif // wxUSE_VALIDATORS
1762
1763 // ----------------------------------------------------------------------------
1764 // update region stuff
1765 // ----------------------------------------------------------------------------
1766
1767 wxRect wxWindowBase::GetUpdateClientRect() const
1768 {
1769     wxRegion rgnUpdate = GetUpdateRegion();
1770     rgnUpdate.Intersect(GetClientRect());
1771     wxRect rectUpdate = rgnUpdate.GetBox();
1772     wxPoint ptOrigin = GetClientAreaOrigin();
1773     rectUpdate.x -= ptOrigin.x;
1774     rectUpdate.y -= ptOrigin.y;
1775
1776     return rectUpdate;
1777 }
1778
1779 bool wxWindowBase::DoIsExposed(int x, int y) const
1780 {
1781     return m_updateRegion.Contains(x, y) != wxOutRegion;
1782 }
1783
1784 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1785 {
1786     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1787 }
1788
1789 void wxWindowBase::ClearBackground()
1790 {
1791     // wxGTK uses its own version, no need to add never used code
1792 #ifndef __WXGTK__
1793     wxClientDC dc((wxWindow *)this);
1794     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1795     dc.SetBackground(brush);
1796     dc.Clear();
1797 #endif // __WXGTK__
1798 }
1799
1800 // ----------------------------------------------------------------------------
1801 // find child window by id or name
1802 // ----------------------------------------------------------------------------
1803
1804 wxWindow *wxWindowBase::FindWindow(long id) const
1805 {
1806     if ( id == m_windowId )
1807         return (wxWindow *)this;
1808
1809     wxWindowBase *res = NULL;
1810     wxWindowList::compatibility_iterator node;
1811     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1812     {
1813         wxWindowBase *child = node->GetData();
1814         res = child->FindWindow( id );
1815     }
1816
1817     return (wxWindow *)res;
1818 }
1819
1820 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1821 {
1822     if ( name == m_windowName )
1823         return (wxWindow *)this;
1824
1825     wxWindowBase *res = NULL;
1826     wxWindowList::compatibility_iterator node;
1827     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1828     {
1829         wxWindow *child = node->GetData();
1830         res = child->FindWindow(name);
1831     }
1832
1833     return (wxWindow *)res;
1834 }
1835
1836
1837 // find any window by id or name or label: If parent is non-NULL, look through
1838 // children for a label or title matching the specified string. If NULL, look
1839 // through all top-level windows.
1840 //
1841 // to avoid duplicating code we reuse the same helper function but with
1842 // different comparators
1843
1844 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1845                                 const wxString& label, long id);
1846
1847 static
1848 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1849                            long WXUNUSED(id))
1850 {
1851     return win->GetLabel() == label;
1852 }
1853
1854 static
1855 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1856                           long WXUNUSED(id))
1857 {
1858     return win->GetName() == label;
1859 }
1860
1861 static
1862 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1863                         long id)
1864 {
1865     return win->GetId() == id;
1866 }
1867
1868 // recursive helper for the FindWindowByXXX() functions
1869 static
1870 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1871                                   const wxString& label,
1872                                   long id,
1873                                   wxFindWindowCmp cmp)
1874 {
1875     if ( parent )
1876     {
1877         // see if this is the one we're looking for
1878         if ( (*cmp)(parent, label, id) )
1879             return (wxWindow *)parent;
1880
1881         // It wasn't, so check all its children
1882         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1883               node;
1884               node = node->GetNext() )
1885         {
1886             // recursively check each child
1887             wxWindow *win = (wxWindow *)node->GetData();
1888             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1889             if (retwin)
1890                 return retwin;
1891         }
1892     }
1893
1894     // Not found
1895     return NULL;
1896 }
1897
1898 // helper for FindWindowByXXX()
1899 static
1900 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1901                              const wxString& label,
1902                              long id,
1903                              wxFindWindowCmp cmp)
1904 {
1905     if ( parent )
1906     {
1907         // just check parent and all its children
1908         return wxFindWindowRecursively(parent, label, id, cmp);
1909     }
1910
1911     // start at very top of wx's windows
1912     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1913           node;
1914           node = node->GetNext() )
1915     {
1916         // recursively check each window & its children
1917         wxWindow *win = node->GetData();
1918         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1919         if (retwin)
1920             return retwin;
1921     }
1922
1923     return NULL;
1924 }
1925
1926 /* static */
1927 wxWindow *
1928 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1929 {
1930     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1931 }
1932
1933 /* static */
1934 wxWindow *
1935 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1936 {
1937     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1938
1939     if ( !win )
1940     {
1941         // fall back to the label
1942         win = FindWindowByLabel(title, parent);
1943     }
1944
1945     return win;
1946 }
1947
1948 /* static */
1949 wxWindow *
1950 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1951 {
1952     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1953 }
1954
1955 // ----------------------------------------------------------------------------
1956 // dialog oriented functions
1957 // ----------------------------------------------------------------------------
1958
1959 #if WXWIN_COMPATIBILITY_2_8
1960 void wxWindowBase::MakeModal(bool modal)
1961 {
1962     // Disable all other windows
1963     if ( IsTopLevel() )
1964     {
1965         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1966         while (node)
1967         {
1968             wxWindow *win = node->GetData();
1969             if (win != this)
1970                 win->Enable(!modal);
1971
1972             node = node->GetNext();
1973         }
1974     }
1975 }
1976 #endif // WXWIN_COMPATIBILITY_2_8
1977
1978 bool wxWindowBase::Validate()
1979 {
1980 #if wxUSE_VALIDATORS
1981     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1982
1983     wxWindowList::compatibility_iterator node;
1984     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1985     {
1986         wxWindowBase *child = node->GetData();
1987         wxValidator *validator = child->GetValidator();
1988         if ( validator && !validator->Validate((wxWindow *)this) )
1989         {
1990             return false;
1991         }
1992
1993         if ( recurse && !child->Validate() )
1994         {
1995             return false;
1996         }
1997     }
1998 #endif // wxUSE_VALIDATORS
1999
2000     return true;
2001 }
2002
2003 bool wxWindowBase::TransferDataToWindow()
2004 {
2005 #if wxUSE_VALIDATORS
2006     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
2007
2008     wxWindowList::compatibility_iterator node;
2009     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
2010     {
2011         wxWindowBase *child = node->GetData();
2012         wxValidator *validator = child->GetValidator();
2013         if ( validator && !validator->TransferToWindow() )
2014         {
2015             wxLogWarning(_("Could not transfer data to window"));
2016 #if wxUSE_LOG
2017             wxLog::FlushActive();
2018 #endif // wxUSE_LOG
2019
2020             return false;
2021         }
2022
2023         if ( recurse )
2024         {
2025             if ( !child->TransferDataToWindow() )
2026             {
2027                 // warning already given
2028                 return false;
2029             }
2030         }
2031     }
2032 #endif // wxUSE_VALIDATORS
2033
2034     return true;
2035 }
2036
2037 bool wxWindowBase::TransferDataFromWindow()
2038 {
2039 #if wxUSE_VALIDATORS
2040     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
2041
2042     wxWindowList::compatibility_iterator node;
2043     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
2044     {
2045         wxWindow *child = node->GetData();
2046         wxValidator *validator = child->GetValidator();
2047         if ( validator && !validator->TransferFromWindow() )
2048         {
2049             // nop warning here because the application is supposed to give
2050             // one itself - we don't know here what might have gone wrongly
2051
2052             return false;
2053         }
2054
2055         if ( recurse )
2056         {
2057             if ( !child->TransferDataFromWindow() )
2058             {
2059                 // warning already given
2060                 return false;
2061             }
2062         }
2063     }
2064 #endif // wxUSE_VALIDATORS
2065
2066     return true;
2067 }
2068
2069 void wxWindowBase::InitDialog()
2070 {
2071     wxInitDialogEvent event(GetId());
2072     event.SetEventObject( this );
2073     GetEventHandler()->ProcessEvent(event);
2074 }
2075
2076 // ----------------------------------------------------------------------------
2077 // context-sensitive help support
2078 // ----------------------------------------------------------------------------
2079
2080 #if wxUSE_HELP
2081
2082 // associate this help text with this window
2083 void wxWindowBase::SetHelpText(const wxString& text)
2084 {
2085     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2086     if ( helpProvider )
2087     {
2088         helpProvider->AddHelp(this, text);
2089     }
2090 }
2091
2092 #if WXWIN_COMPATIBILITY_2_8
2093 // associate this help text with all windows with the same id as this
2094 // one
2095 void wxWindowBase::SetHelpTextForId(const wxString& text)
2096 {
2097     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2098     if ( helpProvider )
2099     {
2100         helpProvider->AddHelp(GetId(), text);
2101     }
2102 }
2103 #endif // WXWIN_COMPATIBILITY_2_8
2104
2105 // get the help string associated with this window (may be empty)
2106 // default implementation forwards calls to the help provider
2107 wxString
2108 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
2109                                  wxHelpEvent::Origin WXUNUSED(origin)) const
2110 {
2111     wxString text;
2112     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2113     if ( helpProvider )
2114     {
2115         text = helpProvider->GetHelp(this);
2116     }
2117
2118     return text;
2119 }
2120
2121 // show help for this window
2122 void wxWindowBase::OnHelp(wxHelpEvent& event)
2123 {
2124     wxHelpProvider *helpProvider = wxHelpProvider::Get();
2125     if ( helpProvider )
2126     {
2127         wxPoint pos = event.GetPosition();
2128         const wxHelpEvent::Origin origin = event.GetOrigin();
2129         if ( origin == wxHelpEvent::Origin_Keyboard )
2130         {
2131             // if the help event was generated from keyboard it shouldn't
2132             // appear at the mouse position (which is still the only position
2133             // associated with help event) if the mouse is far away, although
2134             // we still do use the mouse position if it's over the window
2135             // because we suppose the user looks approximately at the mouse
2136             // already and so it would be more convenient than showing tooltip
2137             // at some arbitrary position which can be quite far from it
2138             const wxRect rectClient = GetClientRect();
2139             if ( !rectClient.Contains(ScreenToClient(pos)) )
2140             {
2141                 // position help slightly under and to the right of this window
2142                 pos = ClientToScreen(wxPoint(
2143                         2*GetCharWidth(),
2144                         rectClient.height + GetCharHeight()
2145                       ));
2146             }
2147         }
2148
2149         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
2150         {
2151             // skip the event.Skip() below
2152             return;
2153         }
2154     }
2155
2156     event.Skip();
2157 }
2158
2159 #endif // wxUSE_HELP
2160
2161 // ----------------------------------------------------------------------------
2162 // tooltips
2163 // ----------------------------------------------------------------------------
2164
2165 #if wxUSE_TOOLTIPS
2166
2167 wxString wxWindowBase::GetToolTipText() const
2168 {
2169     return m_tooltip ? m_tooltip->GetTip() : wxString();
2170 }
2171
2172 void wxWindowBase::SetToolTip( const wxString &tip )
2173 {
2174     // don't create the new tooltip if we already have one
2175     if ( m_tooltip )
2176     {
2177         m_tooltip->SetTip( tip );
2178     }
2179     else
2180     {
2181         SetToolTip( new wxToolTip( tip ) );
2182     }
2183
2184     // setting empty tooltip text does not remove the tooltip any more - use
2185     // SetToolTip(NULL) for this
2186 }
2187
2188 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
2189 {
2190     if ( m_tooltip != tooltip )
2191     {
2192         if ( m_tooltip )
2193             delete m_tooltip;
2194
2195         m_tooltip = tooltip;
2196     }
2197 }
2198
2199 bool wxWindowBase::CopyToolTip(wxToolTip *tip)
2200 {
2201     SetToolTip(tip ? new wxToolTip(tip->GetTip()) : NULL);
2202
2203     return tip != NULL;
2204 }
2205
2206 #endif // wxUSE_TOOLTIPS
2207
2208 // ----------------------------------------------------------------------------
2209 // constraints and sizers
2210 // ----------------------------------------------------------------------------
2211
2212 #if wxUSE_CONSTRAINTS
2213
2214 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
2215 {
2216     if ( m_constraints )
2217     {
2218         UnsetConstraints(m_constraints);
2219         delete m_constraints;
2220     }
2221     m_constraints = constraints;
2222     if ( m_constraints )
2223     {
2224         // Make sure other windows know they're part of a 'meaningful relationship'
2225         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
2226             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
2227         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
2228             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
2229         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
2230             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
2231         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
2232             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
2233         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
2234             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
2235         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
2236             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
2237         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
2238             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
2239         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
2240             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
2241     }
2242 }
2243
2244 // This removes any dangling pointers to this window in other windows'
2245 // constraintsInvolvedIn lists.
2246 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
2247 {
2248     if ( c )
2249     {
2250         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2251             c->left.GetOtherWindow()->RemoveConstraintReference(this);
2252         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
2253             c->top.GetOtherWindow()->RemoveConstraintReference(this);
2254         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
2255             c->right.GetOtherWindow()->RemoveConstraintReference(this);
2256         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
2257             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
2258         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
2259             c->width.GetOtherWindow()->RemoveConstraintReference(this);
2260         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
2261             c->height.GetOtherWindow()->RemoveConstraintReference(this);
2262         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
2263             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
2264         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
2265             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
2266     }
2267 }
2268
2269 // Back-pointer to other windows we're involved with, so if we delete this
2270 // window, we must delete any constraints we're involved with.
2271 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
2272 {
2273     if ( !m_constraintsInvolvedIn )
2274         m_constraintsInvolvedIn = new wxWindowList;
2275     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
2276         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
2277 }
2278
2279 // REMOVE back-pointer to other windows we're involved with.
2280 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
2281 {
2282     if ( m_constraintsInvolvedIn )
2283         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
2284 }
2285
2286 // Reset any constraints that mention this window
2287 void wxWindowBase::DeleteRelatedConstraints()
2288 {
2289     if ( m_constraintsInvolvedIn )
2290     {
2291         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
2292         while (node)
2293         {
2294             wxWindow *win = node->GetData();
2295             wxLayoutConstraints *constr = win->GetConstraints();
2296
2297             // Reset any constraints involving this window
2298             if ( constr )
2299             {
2300                 constr->left.ResetIfWin(this);
2301                 constr->top.ResetIfWin(this);
2302                 constr->right.ResetIfWin(this);
2303                 constr->bottom.ResetIfWin(this);
2304                 constr->width.ResetIfWin(this);
2305                 constr->height.ResetIfWin(this);
2306                 constr->centreX.ResetIfWin(this);
2307                 constr->centreY.ResetIfWin(this);
2308             }
2309
2310             wxWindowList::compatibility_iterator next = node->GetNext();
2311             m_constraintsInvolvedIn->Erase(node);
2312             node = next;
2313         }
2314
2315         wxDELETE(m_constraintsInvolvedIn);
2316     }
2317 }
2318
2319 #endif // wxUSE_CONSTRAINTS
2320
2321 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2322 {
2323     if ( sizer == m_windowSizer)
2324         return;
2325
2326     if ( m_windowSizer )
2327     {
2328         m_windowSizer->SetContainingWindow(NULL);
2329
2330         if ( deleteOld )
2331             delete m_windowSizer;
2332     }
2333
2334     m_windowSizer = sizer;
2335     if ( m_windowSizer )
2336     {
2337         m_windowSizer->SetContainingWindow((wxWindow *)this);
2338     }
2339
2340     SetAutoLayout(m_windowSizer != NULL);
2341 }
2342
2343 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2344 {
2345     SetSizer( sizer, deleteOld );
2346     sizer->SetSizeHints( (wxWindow*) this );
2347 }
2348
2349
2350 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2351 {
2352     // adding a window to a sizer twice is going to result in fatal and
2353     // hard to debug problems later because when deleting the second
2354     // associated wxSizerItem we're going to dereference a dangling
2355     // pointer; so try to detect this as early as possible
2356     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2357                   wxT("Adding a window to the same sizer twice?") );
2358
2359     m_containingSizer = sizer;
2360 }
2361
2362 #if wxUSE_CONSTRAINTS
2363
2364 void wxWindowBase::SatisfyConstraints()
2365 {
2366     wxLayoutConstraints *constr = GetConstraints();
2367     bool wasOk = constr && constr->AreSatisfied();
2368
2369     ResetConstraints();   // Mark all constraints as unevaluated
2370
2371     int noChanges = 1;
2372
2373     // if we're a top level panel (i.e. our parent is frame/dialog), our
2374     // own constraints will never be satisfied any more unless we do it
2375     // here
2376     if ( wasOk )
2377     {
2378         while ( noChanges > 0 )
2379         {
2380             LayoutPhase1(&noChanges);
2381         }
2382     }
2383
2384     LayoutPhase2(&noChanges);
2385 }
2386
2387 #endif // wxUSE_CONSTRAINTS
2388
2389 bool wxWindowBase::Layout()
2390 {
2391     // If there is a sizer, use it instead of the constraints
2392     if ( GetSizer() )
2393     {
2394         int w = 0, h = 0;
2395         GetVirtualSize(&w, &h);
2396         GetSizer()->SetDimension( 0, 0, w, h );
2397     }
2398 #if wxUSE_CONSTRAINTS
2399     else
2400     {
2401         SatisfyConstraints(); // Find the right constraints values
2402         SetConstraintSizes(); // Recursively set the real window sizes
2403     }
2404 #endif
2405
2406     return true;
2407 }
2408
2409 void wxWindowBase::InternalOnSize(wxSizeEvent& event)
2410 {
2411     if ( GetAutoLayout() )
2412         Layout();
2413
2414     event.Skip();
2415 }
2416
2417 #if wxUSE_CONSTRAINTS
2418
2419 // first phase of the constraints evaluation: set our own constraints
2420 bool wxWindowBase::LayoutPhase1(int *noChanges)
2421 {
2422     wxLayoutConstraints *constr = GetConstraints();
2423
2424     return !constr || constr->SatisfyConstraints(this, noChanges);
2425 }
2426
2427 // second phase: set the constraints for our children
2428 bool wxWindowBase::LayoutPhase2(int *noChanges)
2429 {
2430     *noChanges = 0;
2431
2432     // Layout children
2433     DoPhase(1);
2434
2435     // Layout grand children
2436     DoPhase(2);
2437
2438     return true;
2439 }
2440
2441 // Do a phase of evaluating child constraints
2442 bool wxWindowBase::DoPhase(int phase)
2443 {
2444     // the list containing the children for which the constraints are already
2445     // set correctly
2446     wxWindowList succeeded;
2447
2448     // the max number of iterations we loop before concluding that we can't set
2449     // the constraints
2450     static const int maxIterations = 500;
2451
2452     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2453     {
2454         int noChanges = 0;
2455
2456         // loop over all children setting their constraints
2457         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2458               node;
2459               node = node->GetNext() )
2460         {
2461             wxWindow *child = node->GetData();
2462             if ( child->IsTopLevel() )
2463             {
2464                 // top level children are not inside our client area
2465                 continue;
2466             }
2467
2468             if ( !child->GetConstraints() || succeeded.Find(child) )
2469             {
2470                 // this one is either already ok or nothing we can do about it
2471                 continue;
2472             }
2473
2474             int tempNoChanges = 0;
2475             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2476                                       : child->LayoutPhase2(&tempNoChanges);
2477             noChanges += tempNoChanges;
2478
2479             if ( success )
2480             {
2481                 succeeded.Append(child);
2482             }
2483         }
2484
2485         if ( !noChanges )
2486         {
2487             // constraints are set
2488             break;
2489         }
2490     }
2491
2492     return true;
2493 }
2494
2495 void wxWindowBase::ResetConstraints()
2496 {
2497     wxLayoutConstraints *constr = GetConstraints();
2498     if ( constr )
2499     {
2500         constr->left.SetDone(false);
2501         constr->top.SetDone(false);
2502         constr->right.SetDone(false);
2503         constr->bottom.SetDone(false);
2504         constr->width.SetDone(false);
2505         constr->height.SetDone(false);
2506         constr->centreX.SetDone(false);
2507         constr->centreY.SetDone(false);
2508     }
2509
2510     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2511     while (node)
2512     {
2513         wxWindow *win = node->GetData();
2514         if ( !win->IsTopLevel() )
2515             win->ResetConstraints();
2516         node = node->GetNext();
2517     }
2518 }
2519
2520 // Need to distinguish between setting the 'fake' size for windows and sizers,
2521 // and setting the real values.
2522 void wxWindowBase::SetConstraintSizes(bool recurse)
2523 {
2524     wxLayoutConstraints *constr = GetConstraints();
2525     if ( constr && constr->AreSatisfied() )
2526     {
2527         int x = constr->left.GetValue();
2528         int y = constr->top.GetValue();
2529         int w = constr->width.GetValue();
2530         int h = constr->height.GetValue();
2531
2532         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2533              (constr->height.GetRelationship() != wxAsIs) )
2534         {
2535             // We really shouldn't set negative sizes for the windows so make
2536             // them at least of 1*1 size
2537             SetSize(x, y, w > 0 ? w : 1, h > 0 ? h : 1);
2538         }
2539         else
2540         {
2541             // If we don't want to resize this window, just move it...
2542             Move(x, y);
2543         }
2544     }
2545     else if ( constr )
2546     {
2547         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2548                    GetClassInfo()->GetClassName(),
2549                    GetName().c_str());
2550     }
2551
2552     if ( recurse )
2553     {
2554         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2555         while (node)
2556         {
2557             wxWindow *win = node->GetData();
2558             if ( !win->IsTopLevel() && win->GetConstraints() )
2559                 win->SetConstraintSizes();
2560             node = node->GetNext();
2561         }
2562     }
2563 }
2564
2565 // Only set the size/position of the constraint (if any)
2566 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2567 {
2568     wxLayoutConstraints *constr = GetConstraints();
2569     if ( constr )
2570     {
2571         if ( x != wxDefaultCoord )
2572         {
2573             constr->left.SetValue(x);
2574             constr->left.SetDone(true);
2575         }
2576         if ( y != wxDefaultCoord )
2577         {
2578             constr->top.SetValue(y);
2579             constr->top.SetDone(true);
2580         }
2581         if ( w != wxDefaultCoord )
2582         {
2583             constr->width.SetValue(w);
2584             constr->width.SetDone(true);
2585         }
2586         if ( h != wxDefaultCoord )
2587         {
2588             constr->height.SetValue(h);
2589             constr->height.SetDone(true);
2590         }
2591     }
2592 }
2593
2594 void wxWindowBase::MoveConstraint(int x, int y)
2595 {
2596     wxLayoutConstraints *constr = GetConstraints();
2597     if ( constr )
2598     {
2599         if ( x != wxDefaultCoord )
2600         {
2601             constr->left.SetValue(x);
2602             constr->left.SetDone(true);
2603         }
2604         if ( y != wxDefaultCoord )
2605         {
2606             constr->top.SetValue(y);
2607             constr->top.SetDone(true);
2608         }
2609     }
2610 }
2611
2612 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2613 {
2614     wxLayoutConstraints *constr = GetConstraints();
2615     if ( constr )
2616     {
2617         *w = constr->width.GetValue();
2618         *h = constr->height.GetValue();
2619     }
2620     else
2621         GetSize(w, h);
2622 }
2623
2624 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2625 {
2626     wxLayoutConstraints *constr = GetConstraints();
2627     if ( constr )
2628     {
2629         *w = constr->width.GetValue();
2630         *h = constr->height.GetValue();
2631     }
2632     else
2633         GetClientSize(w, h);
2634 }
2635
2636 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2637 {
2638     wxLayoutConstraints *constr = GetConstraints();
2639     if ( constr )
2640     {
2641         *x = constr->left.GetValue();
2642         *y = constr->top.GetValue();
2643     }
2644     else
2645         GetPosition(x, y);
2646 }
2647
2648 #endif // wxUSE_CONSTRAINTS
2649
2650 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2651 {
2652     wxWindow *parent = GetParent();
2653     if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2654     {
2655         wxPoint pt(parent->GetClientAreaOrigin());
2656         x += pt.x;
2657         y += pt.y;
2658     }
2659 }
2660
2661 // ----------------------------------------------------------------------------
2662 // Update UI processing
2663 // ----------------------------------------------------------------------------
2664
2665 void wxWindowBase::UpdateWindowUI(long flags)
2666 {
2667     wxUpdateUIEvent event(GetId());
2668     event.SetEventObject(this);
2669
2670     if ( GetEventHandler()->ProcessEvent(event) )
2671     {
2672         DoUpdateWindowUI(event);
2673     }
2674
2675     if (flags & wxUPDATE_UI_RECURSE)
2676     {
2677         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2678         while (node)
2679         {
2680             wxWindow* child = (wxWindow*) node->GetData();
2681             child->UpdateWindowUI(flags);
2682             node = node->GetNext();
2683         }
2684     }
2685 }
2686
2687 // do the window-specific processing after processing the update event
2688 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2689 {
2690     if ( event.GetSetEnabled() )
2691         Enable(event.GetEnabled());
2692
2693     if ( event.GetSetShown() )
2694         Show(event.GetShown());
2695 }
2696
2697 // ----------------------------------------------------------------------------
2698 // Idle processing
2699 // ----------------------------------------------------------------------------
2700
2701 // Send idle event to window and all subwindows
2702 bool wxWindowBase::SendIdleEvents(wxIdleEvent& event)
2703 {
2704     bool needMore = false;
2705
2706     OnInternalIdle();
2707
2708     // should we send idle event to this window?
2709     if (wxIdleEvent::GetMode() == wxIDLE_PROCESS_ALL ||
2710         HasExtraStyle(wxWS_EX_PROCESS_IDLE))
2711     {
2712         event.SetEventObject(this);
2713         HandleWindowEvent(event);
2714
2715         if (event.MoreRequested())
2716             needMore = true;
2717     }
2718     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2719     for (; node; node = node->GetNext())
2720     {
2721         wxWindow* child = node->GetData();
2722         if (child->SendIdleEvents(event))
2723             needMore = true;
2724     }
2725
2726     return needMore;
2727 }
2728
2729 void wxWindowBase::OnInternalIdle()
2730 {
2731     if ( wxUpdateUIEvent::CanUpdate(this) )
2732         UpdateWindowUI(wxUPDATE_UI_FROMIDLE);
2733 }
2734
2735 // ----------------------------------------------------------------------------
2736 // dialog units translations
2737 // ----------------------------------------------------------------------------
2738
2739 // Windows' computes dialog units using average character width over upper-
2740 // and lower-case ASCII alphabet and not using the average character width
2741 // metadata stored in the font; see
2742 // http://support.microsoft.com/default.aspx/kb/145994 for detailed discussion.
2743 // It's important that we perform the conversion in identical way, because
2744 // dialog units natively exist only on Windows and Windows HIG is expressed
2745 // using them.
2746 wxSize wxWindowBase::GetDlgUnitBase() const
2747 {
2748     const wxWindowBase * const parent = wxGetTopLevelParent((wxWindow*)this);
2749
2750     if ( !parent->m_font.IsOk() )
2751     {
2752         // Default GUI font is used. This is the most common case, so
2753         // cache the results.
2754         static wxSize s_defFontSize;
2755         if ( s_defFontSize.x == 0 )
2756             s_defFontSize = wxPrivate::GetAverageASCIILetterSize(*parent);
2757         return s_defFontSize;
2758     }
2759     else
2760     {
2761         // Custom font, we always need to compute the result
2762         return wxPrivate::GetAverageASCIILetterSize(*parent);
2763     }
2764 }
2765
2766 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt) const
2767 {
2768     const wxSize base = GetDlgUnitBase();
2769
2770     // NB: wxMulDivInt32() is used, because it correctly rounds the result
2771
2772     wxPoint pt2 = wxDefaultPosition;
2773     if (pt.x != wxDefaultCoord)
2774         pt2.x = wxMulDivInt32(pt.x, 4, base.x);
2775     if (pt.y != wxDefaultCoord)
2776         pt2.y = wxMulDivInt32(pt.y, 8, base.y);
2777
2778     return pt2;
2779 }
2780
2781 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt) const
2782 {
2783     const wxSize base = GetDlgUnitBase();
2784
2785     wxPoint pt2 = wxDefaultPosition;
2786     if (pt.x != wxDefaultCoord)
2787         pt2.x = wxMulDivInt32(pt.x, base.x, 4);
2788     if (pt.y != wxDefaultCoord)
2789         pt2.y = wxMulDivInt32(pt.y, base.y, 8);
2790
2791     return pt2;
2792 }
2793
2794 // ----------------------------------------------------------------------------
2795 // event handlers
2796 // ----------------------------------------------------------------------------
2797
2798 // propagate the colour change event to the subwindows
2799 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& WXUNUSED(event))
2800 {
2801     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2802     while ( node )
2803     {
2804         // Only propagate to non-top-level windows
2805         wxWindow *win = node->GetData();
2806         if ( !win->IsTopLevel() )
2807         {
2808             wxSysColourChangedEvent event2;
2809             event2.SetEventObject(win);
2810             win->GetEventHandler()->ProcessEvent(event2);
2811         }
2812
2813         node = node->GetNext();
2814     }
2815
2816     Refresh();
2817 }
2818
2819 // the default action is to populate dialog with data when it's created,
2820 // and nudge the UI into displaying itself correctly in case
2821 // we've turned the wxUpdateUIEvents frequency down low.
2822 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2823 {
2824     TransferDataToWindow();
2825
2826     // Update the UI at this point
2827     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2828 }
2829
2830 // ----------------------------------------------------------------------------
2831 // menu-related functions
2832 // ----------------------------------------------------------------------------
2833
2834 #if wxUSE_MENUS
2835
2836 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2837 {
2838     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2839
2840     wxMenuInvokingWindowSetter
2841         setInvokingWin(*menu, static_cast<wxWindow *>(this));
2842
2843     wxCurrentPopupMenu = menu;
2844     const bool rc = DoPopupMenu(menu, x, y);
2845     wxCurrentPopupMenu = NULL;
2846
2847     return rc;
2848 }
2849
2850 // this is used to pass the id of the selected item from the menu event handler
2851 // to the main function itself
2852 //
2853 // it's ok to use a global here as there can be at most one popup menu shown at
2854 // any time
2855 static int gs_popupMenuSelection = wxID_NONE;
2856
2857 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2858 {
2859     // store the id in a global variable where we'll retrieve it from later
2860     gs_popupMenuSelection = event.GetId();
2861 }
2862
2863 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2864 {
2865     // nothing to do but do not skip it
2866 }
2867
2868 int
2869 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2870 {
2871     gs_popupMenuSelection = wxID_NONE;
2872
2873     Connect(wxEVT_COMMAND_MENU_SELECTED,
2874             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2875             NULL,
2876             this);
2877
2878     // it is common to construct the menu passed to this function dynamically
2879     // using some fixed range of ids which could clash with the ids used
2880     // elsewhere in the program, which could result in some menu items being
2881     // unintentionally disabled or otherwise modified by update UI handlers
2882     // elsewhere in the program code and this is difficult to avoid in the
2883     // program itself, so instead we just temporarily suspend UI updating while
2884     // this menu is shown
2885     Connect(wxEVT_UPDATE_UI,
2886             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2887             NULL,
2888             this);
2889
2890     PopupMenu(&menu, x, y);
2891
2892     Disconnect(wxEVT_UPDATE_UI,
2893                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2894                NULL,
2895                this);
2896     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2897                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2898                NULL,
2899                this);
2900
2901     return gs_popupMenuSelection;
2902 }
2903
2904 #endif // wxUSE_MENUS
2905
2906 // methods for drawing the sizers in a visible way: this is currently only
2907 // enabled for "full debug" builds with wxDEBUG_LEVEL==2 as it doesn't work
2908 // that well and also because we don't want to leave it enabled in default
2909 // builds used for production
2910 #if wxDEBUG_LEVEL > 1
2911
2912 static void DrawSizers(wxWindowBase *win);
2913
2914 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2915 {
2916     wxClientDC dc((wxWindow *)win);
2917     dc.SetPen(*pen);
2918     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2919                        *wxTRANSPARENT_BRUSH);
2920     dc.DrawRectangle(rect.Deflate(1, 1));
2921 }
2922
2923 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2924 {
2925     const wxSizerItemList& items = sizer->GetChildren();
2926     for ( wxSizerItemList::const_iterator i = items.begin(),
2927                                         end = items.end();
2928           i != end;
2929           ++i )
2930     {
2931         wxSizerItem *item = *i;
2932         if ( item->IsSizer() )
2933         {
2934             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2935             DrawSizer(win, item->GetSizer());
2936         }
2937         else if ( item->IsSpacer() )
2938         {
2939             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2940         }
2941         else if ( item->IsWindow() )
2942         {
2943             DrawSizers(item->GetWindow());
2944         }
2945         else
2946             wxFAIL_MSG("inconsistent wxSizerItem status!");
2947     }
2948 }
2949
2950 static void DrawSizers(wxWindowBase *win)
2951 {
2952     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2953
2954     wxSizer *sizer = win->GetSizer();
2955     if ( sizer )
2956     {
2957         DrawSizer(win, sizer);
2958     }
2959     else // no sizer, still recurse into the children
2960     {
2961         const wxWindowList& children = win->GetChildren();
2962         for ( wxWindowList::const_iterator i = children.begin(),
2963                                          end = children.end();
2964               i != end;
2965               ++i )
2966         {
2967             DrawSizers(*i);
2968         }
2969
2970         // show all kind of sizes of this window; see the "window sizing" topic
2971         // overview for more info about the various differences:
2972         wxSize fullSz = win->GetSize();
2973         wxSize clientSz = win->GetClientSize();
2974         wxSize bestSz = win->GetBestSize();
2975         wxSize minSz = win->GetMinSize();
2976         wxSize maxSz = win->GetMaxSize();
2977         wxSize virtualSz = win->GetVirtualSize();
2978
2979         wxMessageOutputDebug dbgout;
2980         dbgout.Printf(
2981             "%-10s => fullsz=%4d;%-4d  clientsz=%4d;%-4d  bestsz=%4d;%-4d  minsz=%4d;%-4d  maxsz=%4d;%-4d virtualsz=%4d;%-4d\n",
2982             win->GetName(),
2983             fullSz.x, fullSz.y,
2984             clientSz.x, clientSz.y,
2985             bestSz.x, bestSz.y,
2986             minSz.x, minSz.y,
2987             maxSz.x, maxSz.y,
2988             virtualSz.x, virtualSz.y);
2989     }
2990 }
2991
2992 #endif // wxDEBUG_LEVEL
2993
2994 // process special middle clicks
2995 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
2996 {
2997     if ( event.ControlDown() && event.AltDown() )
2998     {
2999 #if wxDEBUG_LEVEL > 1
3000         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
3001         if ( event.ShiftDown() )
3002         {
3003             DrawSizers(this);
3004         }
3005         else
3006 #endif // __WXDEBUG__
3007         {
3008 #if wxUSE_MSGDLG
3009             // just Ctrl-Alt-middle click shows information about wx version
3010             ::wxInfoMessageBox((wxWindow*)this);
3011 #endif // wxUSE_MSGDLG
3012         }
3013     }
3014     else
3015     {
3016         event.Skip();
3017     }
3018 }
3019
3020 // ----------------------------------------------------------------------------
3021 // accessibility
3022 // ----------------------------------------------------------------------------
3023
3024 #if wxUSE_ACCESSIBILITY
3025 void wxWindowBase::SetAccessible(wxAccessible* accessible)
3026 {
3027     if (m_accessible && (accessible != m_accessible))
3028         delete m_accessible;
3029     m_accessible = accessible;
3030     if (m_accessible)
3031         m_accessible->SetWindow((wxWindow*) this);
3032 }
3033
3034 // Returns the accessible object, creating if necessary.
3035 wxAccessible* wxWindowBase::GetOrCreateAccessible()
3036 {
3037     if (!m_accessible)
3038         m_accessible = CreateAccessible();
3039     return m_accessible;
3040 }
3041
3042 // Override to create a specific accessible object.
3043 wxAccessible* wxWindowBase::CreateAccessible()
3044 {
3045     return new wxWindowAccessible((wxWindow*) this);
3046 }
3047
3048 #endif
3049
3050 // ----------------------------------------------------------------------------
3051 // list classes implementation
3052 // ----------------------------------------------------------------------------
3053
3054 #if wxUSE_STD_CONTAINERS
3055
3056 #include "wx/listimpl.cpp"
3057 WX_DEFINE_LIST(wxWindowList)
3058
3059 #else // !wxUSE_STD_CONTAINERS
3060
3061 void wxWindowListNode::DeleteData()
3062 {
3063     delete (wxWindow *)GetData();
3064 }
3065
3066 #endif // wxUSE_STD_CONTAINERS/!wxUSE_STD_CONTAINERS
3067
3068 // ----------------------------------------------------------------------------
3069 // borders
3070 // ----------------------------------------------------------------------------
3071
3072 wxBorder wxWindowBase::GetBorder(long flags) const
3073 {
3074     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
3075     if ( border == wxBORDER_DEFAULT )
3076     {
3077         border = GetDefaultBorder();
3078     }
3079     else if ( border == wxBORDER_THEME )
3080     {
3081         border = GetDefaultBorderForControl();
3082     }
3083
3084     return border;
3085 }
3086
3087 wxBorder wxWindowBase::GetDefaultBorder() const
3088 {
3089     return wxBORDER_NONE;
3090 }
3091
3092 // ----------------------------------------------------------------------------
3093 // hit testing
3094 // ----------------------------------------------------------------------------
3095
3096 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
3097 {
3098     // here we just check if the point is inside the window or not
3099
3100     // check the top and left border first
3101     bool outside = x < 0 || y < 0;
3102     if ( !outside )
3103     {
3104         // check the right and bottom borders too
3105         wxSize size = GetSize();
3106         outside = x >= size.x || y >= size.y;
3107     }
3108
3109     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
3110 }
3111
3112 // ----------------------------------------------------------------------------
3113 // mouse capture
3114 // ----------------------------------------------------------------------------
3115
3116 struct WXDLLEXPORT wxWindowNext
3117 {
3118     wxWindow *win;
3119     wxWindowNext *next;
3120 } *wxWindowBase::ms_winCaptureNext = NULL;
3121 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
3122 bool wxWindowBase::ms_winCaptureChanging = false;
3123
3124 void wxWindowBase::CaptureMouse()
3125 {
3126     wxLogTrace(wxT("mousecapture"), wxT("CaptureMouse(%p)"), static_cast<void*>(this));
3127
3128     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive CaptureMouse call?") );
3129
3130     ms_winCaptureChanging = true;
3131
3132     wxWindow *winOld = GetCapture();
3133     if ( winOld )
3134     {
3135         ((wxWindowBase*) winOld)->DoReleaseMouse();
3136
3137         // save it on stack
3138         wxWindowNext *item = new wxWindowNext;
3139         item->win = winOld;
3140         item->next = ms_winCaptureNext;
3141         ms_winCaptureNext = item;
3142     }
3143     //else: no mouse capture to save
3144
3145     DoCaptureMouse();
3146     ms_winCaptureCurrent = (wxWindow*)this;
3147
3148     ms_winCaptureChanging = false;
3149 }
3150
3151 void wxWindowBase::ReleaseMouse()
3152 {
3153     wxLogTrace(wxT("mousecapture"), wxT("ReleaseMouse(%p)"), static_cast<void*>(this));
3154
3155     wxASSERT_MSG( !ms_winCaptureChanging, wxT("recursive ReleaseMouse call?") );
3156
3157     wxASSERT_MSG( GetCapture() == this,
3158                   "attempt to release mouse, but this window hasn't captured it" );
3159     wxASSERT_MSG( ms_winCaptureCurrent == this,
3160                   "attempt to release mouse, but this window hasn't captured it" );
3161
3162     ms_winCaptureChanging = true;
3163
3164     DoReleaseMouse();
3165     ms_winCaptureCurrent = NULL;
3166
3167     if ( ms_winCaptureNext )
3168     {
3169         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
3170         ms_winCaptureCurrent = ms_winCaptureNext->win;
3171
3172         wxWindowNext *item = ms_winCaptureNext;
3173         ms_winCaptureNext = item->next;
3174         delete item;
3175     }
3176     //else: stack is empty, no previous capture
3177
3178     ms_winCaptureChanging = false;
3179
3180     wxLogTrace(wxT("mousecapture"),
3181         (const wxChar *) wxT("After ReleaseMouse() mouse is captured by %p"),
3182         static_cast<void*>(GetCapture()));
3183 }
3184
3185 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
3186 {
3187     wxMouseCaptureLostEvent event(win->GetId());
3188     event.SetEventObject(win);
3189     if ( !win->GetEventHandler()->ProcessEvent(event) )
3190     {
3191         // windows must handle this event, otherwise the app wouldn't behave
3192         // correctly if it loses capture unexpectedly; see the discussion here:
3193         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
3194         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
3195         wxFAIL_MSG( wxT("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
3196     }
3197 }
3198
3199 /* static */
3200 void wxWindowBase::NotifyCaptureLost()
3201 {
3202     // don't do anything if capture lost was expected, i.e. resulted from
3203     // a wx call to ReleaseMouse or CaptureMouse:
3204     if ( ms_winCaptureChanging )
3205         return;
3206
3207     // if the capture was lost unexpectedly, notify every window that has
3208     // capture (on stack or current) about it and clear the stack:
3209
3210     if ( ms_winCaptureCurrent )
3211     {
3212         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
3213         ms_winCaptureCurrent = NULL;
3214     }
3215
3216     while ( ms_winCaptureNext )
3217     {
3218         wxWindowNext *item = ms_winCaptureNext;
3219         ms_winCaptureNext = item->next;
3220
3221         DoNotifyWindowAboutCaptureLost(item->win);
3222
3223         delete item;
3224     }
3225 }
3226
3227 #if wxUSE_HOTKEY
3228
3229 bool
3230 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
3231                              int WXUNUSED(modifiers),
3232                              int WXUNUSED(keycode))
3233 {
3234     // not implemented
3235     return false;
3236 }
3237
3238 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
3239 {
3240     // not implemented
3241     return false;
3242 }
3243
3244 #endif // wxUSE_HOTKEY
3245
3246 // ----------------------------------------------------------------------------
3247 // event processing
3248 // ----------------------------------------------------------------------------
3249
3250 bool wxWindowBase::TryBefore(wxEvent& event)
3251 {
3252 #if wxUSE_VALIDATORS
3253     // Can only use the validator of the window which
3254     // is receiving the event
3255     if ( event.GetEventObject() == this )
3256     {
3257         wxValidator * const validator = GetValidator();
3258         if ( validator && validator->ProcessEventLocally(event) )
3259         {
3260             return true;
3261         }
3262     }
3263 #endif // wxUSE_VALIDATORS
3264
3265     return wxEvtHandler::TryBefore(event);
3266 }
3267
3268 bool wxWindowBase::TryAfter(wxEvent& event)
3269 {
3270     // carry on up the parent-child hierarchy if the propagation count hasn't
3271     // reached zero yet
3272     if ( event.ShouldPropagate() )
3273     {
3274         // honour the requests to stop propagation at this window: this is
3275         // used by the dialogs, for example, to prevent processing the events
3276         // from the dialog controls in the parent frame which rarely, if ever,
3277         // makes sense
3278         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
3279         {
3280             wxWindow *parent = GetParent();
3281             if ( parent && !parent->IsBeingDeleted() )
3282             {
3283                 wxPropagateOnce propagateOnce(event);
3284
3285                 return parent->GetEventHandler()->ProcessEvent(event);
3286             }
3287         }
3288     }
3289
3290     return wxEvtHandler::TryAfter(event);
3291 }
3292
3293 // ----------------------------------------------------------------------------
3294 // window relationships
3295 // ----------------------------------------------------------------------------
3296
3297 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
3298 {
3299     wxCHECK_MSG( GetParent(), NULL,
3300                     wxT("GetPrev/NextSibling() don't work for TLWs!") );
3301
3302     wxWindowList& siblings = GetParent()->GetChildren();
3303     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
3304     wxCHECK_MSG( i, NULL, wxT("window not a child of its parent?") );
3305
3306     if ( order == OrderBefore )
3307         i = i->GetPrevious();
3308     else // OrderAfter
3309         i = i->GetNext();
3310
3311     return i ? i->GetData() : NULL;
3312 }
3313
3314 // ----------------------------------------------------------------------------
3315 // keyboard navigation
3316 // ----------------------------------------------------------------------------
3317
3318 // Navigates in the specified direction inside this window
3319 bool wxWindowBase::DoNavigateIn(int flags)
3320 {
3321 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
3322     // native code doesn't process our wxNavigationKeyEvents anyhow
3323     wxUnusedVar(flags);
3324     return false;
3325 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
3326     wxNavigationKeyEvent eventNav;
3327     wxWindow *focused = FindFocus();
3328     eventNav.SetCurrentFocus(focused);
3329     eventNav.SetEventObject(focused);
3330     eventNav.SetFlags(flags);
3331     return GetEventHandler()->ProcessEvent(eventNav);
3332 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
3333 }
3334
3335 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
3336 {
3337     if ( event.GetKeyCode() != WXK_TAB )
3338         return false;
3339
3340     int flags = wxNavigationKeyEvent::FromTab;
3341
3342     if ( event.ShiftDown() )
3343         flags |= wxNavigationKeyEvent::IsBackward;
3344     else
3345         flags |= wxNavigationKeyEvent::IsForward;
3346
3347     if ( event.ControlDown() )
3348         flags |= wxNavigationKeyEvent::WinChange;
3349
3350     Navigate(flags);
3351     return true;
3352 }
3353
3354 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
3355 {
3356     // check that we're not a top level window
3357     wxCHECK_RET( GetParent(),
3358                     wxT("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
3359
3360     // detect the special case when we have nothing to do anyhow and when the
3361     // code below wouldn't work
3362     if ( win == this )
3363         return;
3364
3365     // find the target window in the siblings list
3366     wxWindowList& siblings = GetParent()->GetChildren();
3367     wxWindowList::compatibility_iterator i = siblings.Find(win);
3368     wxCHECK_RET( i, wxT("MoveBefore/AfterInTabOrder(): win is not a sibling") );
3369
3370     // unfortunately, when wxUSE_STD_CONTAINERS == 1 DetachNode() is not
3371     // implemented so we can't just move the node around
3372     wxWindow *self = (wxWindow *)this;
3373     siblings.DeleteObject(self);
3374     if ( move == OrderAfter )
3375     {
3376         i = i->GetNext();
3377     }
3378
3379     if ( i )
3380     {
3381         siblings.Insert(i, self);
3382     }
3383     else // OrderAfter and win was the last sibling
3384     {
3385         siblings.Append(self);
3386     }
3387 }
3388
3389 // ----------------------------------------------------------------------------
3390 // focus handling
3391 // ----------------------------------------------------------------------------
3392
3393 /*static*/ wxWindow* wxWindowBase::FindFocus()
3394 {
3395     wxWindowBase *win = DoFindFocus();
3396     return win ? win->GetMainWindowOfCompositeControl() : NULL;
3397 }
3398
3399 bool wxWindowBase::HasFocus() const
3400 {
3401     wxWindowBase* const win = DoFindFocus();
3402     return win &&
3403             (this == win || this == win->GetMainWindowOfCompositeControl());
3404 }
3405
3406 // ----------------------------------------------------------------------------
3407 // drag and drop
3408 // ----------------------------------------------------------------------------
3409
3410 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3411
3412 namespace
3413 {
3414
3415 class DragAcceptFilesTarget : public wxFileDropTarget
3416 {
3417 public:
3418     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3419
3420     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3421                              const wxArrayString& filenames)
3422     {
3423         wxDropFilesEvent event(wxEVT_DROP_FILES,
3424                                filenames.size(),
3425                                wxCArrayString(filenames).Release());
3426         event.SetEventObject(m_win);
3427         event.m_pos.x = x;
3428         event.m_pos.y = y;
3429
3430         return m_win->HandleWindowEvent(event);
3431     }
3432
3433 private:
3434     wxWindowBase * const m_win;
3435
3436     wxDECLARE_NO_COPY_CLASS(DragAcceptFilesTarget);
3437 };
3438
3439
3440 } // anonymous namespace
3441
3442 // Generic version of DragAcceptFiles(). It works by installing a simple
3443 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3444 // together with explicit SetDropTarget() calls.
3445 void wxWindowBase::DragAcceptFiles(bool accept)
3446 {
3447     if ( accept )
3448     {
3449         wxASSERT_MSG( !GetDropTarget(),
3450                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3451         SetDropTarget(new DragAcceptFilesTarget(this));
3452     }
3453     else
3454     {
3455         SetDropTarget(NULL);
3456     }
3457 }
3458
3459 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3460
3461 // ----------------------------------------------------------------------------
3462 // global functions
3463 // ----------------------------------------------------------------------------
3464
3465 wxWindow* wxGetTopLevelParent(wxWindow *win)
3466 {
3467     while ( win && !win->IsTopLevel() )
3468          win = win->GetParent();
3469
3470     return win;
3471 }
3472
3473 #if wxUSE_ACCESSIBILITY
3474 // ----------------------------------------------------------------------------
3475 // accessible object for windows
3476 // ----------------------------------------------------------------------------
3477
3478 // Can return either a child object, or an integer
3479 // representing the child element, starting from 1.
3480 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3481 {
3482     wxASSERT( GetWindow() != NULL );
3483     if (!GetWindow())
3484         return wxACC_FAIL;
3485
3486     return wxACC_NOT_IMPLEMENTED;
3487 }
3488
3489 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3490 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3491 {
3492     wxASSERT( GetWindow() != NULL );
3493     if (!GetWindow())
3494         return wxACC_FAIL;
3495
3496     wxWindow* win = NULL;
3497     if (elementId == 0)
3498     {
3499         win = GetWindow();
3500     }
3501     else
3502     {
3503         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3504         {
3505             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3506         }
3507         else
3508             return wxACC_FAIL;
3509     }
3510     if (win)
3511     {
3512         rect = win->GetRect();
3513         if (win->GetParent() && !wxDynamicCast(win, wxTopLevelWindow))
3514             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3515         return wxACC_OK;
3516     }
3517
3518     return wxACC_NOT_IMPLEMENTED;
3519 }
3520
3521 // Navigates from fromId to toId/toObject.
3522 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3523                              int* WXUNUSED(toId), wxAccessible** toObject)
3524 {
3525     wxASSERT( GetWindow() != NULL );
3526     if (!GetWindow())
3527         return wxACC_FAIL;
3528
3529     switch (navDir)
3530     {
3531     case wxNAVDIR_FIRSTCHILD:
3532         {
3533             if (GetWindow()->GetChildren().GetCount() == 0)
3534                 return wxACC_FALSE;
3535             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3536             *toObject = childWindow->GetOrCreateAccessible();
3537
3538             return wxACC_OK;
3539         }
3540     case wxNAVDIR_LASTCHILD:
3541         {
3542             if (GetWindow()->GetChildren().GetCount() == 0)
3543                 return wxACC_FALSE;
3544             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3545             *toObject = childWindow->GetOrCreateAccessible();
3546
3547             return wxACC_OK;
3548         }
3549     case wxNAVDIR_RIGHT:
3550     case wxNAVDIR_DOWN:
3551     case wxNAVDIR_NEXT:
3552         {
3553             wxWindowList::compatibility_iterator node =
3554                 wxWindowList::compatibility_iterator();
3555             if (fromId == 0)
3556             {
3557                 // Can't navigate to sibling of this window
3558                 // if we're a top-level window.
3559                 if (!GetWindow()->GetParent())
3560                     return wxACC_NOT_IMPLEMENTED;
3561
3562                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3563             }
3564             else
3565             {
3566                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3567                     node = GetWindow()->GetChildren().Item(fromId-1);
3568             }
3569
3570             if (node && node->GetNext())
3571             {
3572                 wxWindow* nextWindow = node->GetNext()->GetData();
3573                 *toObject = nextWindow->GetOrCreateAccessible();
3574                 return wxACC_OK;
3575             }
3576             else
3577                 return wxACC_FALSE;
3578         }
3579     case wxNAVDIR_LEFT:
3580     case wxNAVDIR_UP:
3581     case wxNAVDIR_PREVIOUS:
3582         {
3583             wxWindowList::compatibility_iterator node =
3584                 wxWindowList::compatibility_iterator();
3585             if (fromId == 0)
3586             {
3587                 // Can't navigate to sibling of this window
3588                 // if we're a top-level window.
3589                 if (!GetWindow()->GetParent())
3590                     return wxACC_NOT_IMPLEMENTED;
3591
3592                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3593             }
3594             else
3595             {
3596                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3597                     node = GetWindow()->GetChildren().Item(fromId-1);
3598             }
3599
3600             if (node && node->GetPrevious())
3601             {
3602                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3603                 *toObject = previousWindow->GetOrCreateAccessible();
3604                 return wxACC_OK;
3605             }
3606             else
3607                 return wxACC_FALSE;
3608         }
3609     }
3610
3611     return wxACC_NOT_IMPLEMENTED;
3612 }
3613
3614 // Gets the name of the specified object.
3615 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3616 {
3617     wxASSERT( GetWindow() != NULL );
3618     if (!GetWindow())
3619         return wxACC_FAIL;
3620
3621     wxString title;
3622
3623     // If a child, leave wxWidgets to call the function on the actual
3624     // child object.
3625     if (childId > 0)
3626         return wxACC_NOT_IMPLEMENTED;
3627
3628     // This will eventually be replaced by specialised
3629     // accessible classes, one for each kind of wxWidgets
3630     // control or window.
3631 #if wxUSE_BUTTON
3632     if (wxDynamicCast(GetWindow(), wxButton))
3633         title = ((wxButton*) GetWindow())->GetLabel();
3634     else
3635 #endif
3636         title = GetWindow()->GetName();
3637
3638     if (!title.empty())
3639     {
3640         *name = title;
3641         return wxACC_OK;
3642     }
3643     else
3644         return wxACC_NOT_IMPLEMENTED;
3645 }
3646
3647 // Gets the number of children.
3648 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3649 {
3650     wxASSERT( GetWindow() != NULL );
3651     if (!GetWindow())
3652         return wxACC_FAIL;
3653
3654     *childId = (int) GetWindow()->GetChildren().GetCount();
3655     return wxACC_OK;
3656 }
3657
3658 // Gets the specified child (starting from 1).
3659 // If *child is NULL and return value is wxACC_OK,
3660 // this means that the child is a simple element and
3661 // not an accessible object.
3662 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3663 {
3664     wxASSERT( GetWindow() != NULL );
3665     if (!GetWindow())
3666         return wxACC_FAIL;
3667
3668     if (childId == 0)
3669     {
3670         *child = this;
3671         return wxACC_OK;
3672     }
3673
3674     if (childId > (int) GetWindow()->GetChildren().GetCount())
3675         return wxACC_FAIL;
3676
3677     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3678     *child = childWindow->GetOrCreateAccessible();
3679     if (*child)
3680         return wxACC_OK;
3681     else
3682         return wxACC_FAIL;
3683 }
3684
3685 // Gets the parent, or NULL.
3686 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3687 {
3688     wxASSERT( GetWindow() != NULL );
3689     if (!GetWindow())
3690         return wxACC_FAIL;
3691
3692     wxWindow* parentWindow = GetWindow()->GetParent();
3693     if (!parentWindow)
3694     {
3695         *parent = NULL;
3696         return wxACC_OK;
3697     }
3698     else
3699     {
3700         *parent = parentWindow->GetOrCreateAccessible();
3701         if (*parent)
3702             return wxACC_OK;
3703         else
3704             return wxACC_FAIL;
3705     }
3706 }
3707
3708 // Performs the default action. childId is 0 (the action for this object)
3709 // or > 0 (the action for a child).
3710 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3711 // window (e.g. an edit control).
3712 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3713 {
3714     wxASSERT( GetWindow() != NULL );
3715     if (!GetWindow())
3716         return wxACC_FAIL;
3717
3718     return wxACC_NOT_IMPLEMENTED;
3719 }
3720
3721 // Gets the default action for this object (0) or > 0 (the action for a child).
3722 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3723 // string if there is no action.
3724 // The retrieved string describes the action that is performed on an object,
3725 // not what the object does as a result. For example, a toolbar button that prints
3726 // a document has a default action of "Press" rather than "Prints the current document."
3727 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3728 {
3729     wxASSERT( GetWindow() != NULL );
3730     if (!GetWindow())
3731         return wxACC_FAIL;
3732
3733     return wxACC_NOT_IMPLEMENTED;
3734 }
3735
3736 // Returns the description for this object or a child.
3737 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3738 {
3739     wxASSERT( GetWindow() != NULL );
3740     if (!GetWindow())
3741         return wxACC_FAIL;
3742
3743     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3744     if (!ht.empty())
3745     {
3746         *description = ht;
3747         return wxACC_OK;
3748     }
3749     return wxACC_NOT_IMPLEMENTED;
3750 }
3751
3752 // Returns help text for this object or a child, similar to tooltip text.
3753 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3754 {
3755     wxASSERT( GetWindow() != NULL );
3756     if (!GetWindow())
3757         return wxACC_FAIL;
3758
3759     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3760     if (!ht.empty())
3761     {
3762         *helpText = ht;
3763         return wxACC_OK;
3764     }
3765     return wxACC_NOT_IMPLEMENTED;
3766 }
3767
3768 // Returns the keyboard shortcut for this object or child.
3769 // Return e.g. ALT+K
3770 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3771 {
3772     wxASSERT( GetWindow() != NULL );
3773     if (!GetWindow())
3774         return wxACC_FAIL;
3775
3776     return wxACC_NOT_IMPLEMENTED;
3777 }
3778
3779 // Returns a role constant.
3780 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3781 {
3782     wxASSERT( GetWindow() != NULL );
3783     if (!GetWindow())
3784         return wxACC_FAIL;
3785
3786     // If a child, leave wxWidgets to call the function on the actual
3787     // child object.
3788     if (childId > 0)
3789         return wxACC_NOT_IMPLEMENTED;
3790
3791     if (wxDynamicCast(GetWindow(), wxControl))
3792         return wxACC_NOT_IMPLEMENTED;
3793 #if wxUSE_STATUSBAR
3794     if (wxDynamicCast(GetWindow(), wxStatusBar))
3795         return wxACC_NOT_IMPLEMENTED;
3796 #endif
3797 #if wxUSE_TOOLBAR
3798     if (wxDynamicCast(GetWindow(), wxToolBar))
3799         return wxACC_NOT_IMPLEMENTED;
3800 #endif
3801
3802     //*role = wxROLE_SYSTEM_CLIENT;
3803     *role = wxROLE_SYSTEM_CLIENT;
3804     return wxACC_OK;
3805
3806     #if 0
3807     return wxACC_NOT_IMPLEMENTED;
3808     #endif
3809 }
3810
3811 // Returns a state constant.
3812 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3813 {
3814     wxASSERT( GetWindow() != NULL );
3815     if (!GetWindow())
3816         return wxACC_FAIL;
3817
3818     // If a child, leave wxWidgets to call the function on the actual
3819     // child object.
3820     if (childId > 0)
3821         return wxACC_NOT_IMPLEMENTED;
3822
3823     if (wxDynamicCast(GetWindow(), wxControl))
3824         return wxACC_NOT_IMPLEMENTED;
3825
3826 #if wxUSE_STATUSBAR
3827     if (wxDynamicCast(GetWindow(), wxStatusBar))
3828         return wxACC_NOT_IMPLEMENTED;
3829 #endif
3830 #if wxUSE_TOOLBAR
3831     if (wxDynamicCast(GetWindow(), wxToolBar))
3832         return wxACC_NOT_IMPLEMENTED;
3833 #endif
3834
3835     *state = 0;
3836     return wxACC_OK;
3837
3838     #if 0
3839     return wxACC_NOT_IMPLEMENTED;
3840     #endif
3841 }
3842
3843 // Returns a localized string representing the value for the object
3844 // or child.
3845 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3846 {
3847     wxASSERT( GetWindow() != NULL );
3848     if (!GetWindow())
3849         return wxACC_FAIL;
3850
3851     return wxACC_NOT_IMPLEMENTED;
3852 }
3853
3854 // Selects the object or child.
3855 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3856 {
3857     wxASSERT( GetWindow() != NULL );
3858     if (!GetWindow())
3859         return wxACC_FAIL;
3860
3861     return wxACC_NOT_IMPLEMENTED;
3862 }
3863
3864 // Gets the window with the keyboard focus.
3865 // If childId is 0 and child is NULL, no object in
3866 // this subhierarchy has the focus.
3867 // If this object has the focus, child should be 'this'.
3868 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3869 {
3870     wxASSERT( GetWindow() != NULL );
3871     if (!GetWindow())
3872         return wxACC_FAIL;
3873
3874     return wxACC_NOT_IMPLEMENTED;
3875 }
3876
3877 #if wxUSE_VARIANT
3878 // Gets a variant representing the selected children
3879 // of this object.
3880 // Acceptable values:
3881 // - a null variant (IsNull() returns true)
3882 // - a list variant (GetType() == wxT("list")
3883 // - an integer representing the selected child element,
3884 //   or 0 if this object is selected (GetType() == wxT("long")
3885 // - a "void*" pointer to a wxAccessible child object
3886 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3887 {
3888     wxASSERT( GetWindow() != NULL );
3889     if (!GetWindow())
3890         return wxACC_FAIL;
3891
3892     return wxACC_NOT_IMPLEMENTED;
3893 }
3894 #endif // wxUSE_VARIANT
3895
3896 #endif // wxUSE_ACCESSIBILITY
3897
3898 // ----------------------------------------------------------------------------
3899 // RTL support
3900 // ----------------------------------------------------------------------------
3901
3902 wxCoord
3903 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3904                                        wxCoord width,
3905                                        wxCoord widthTotal) const
3906 {
3907     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3908     {
3909         x = widthTotal - x - width;
3910     }
3911
3912     return x;
3913 }
3914
3915