src/common/wincmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/window.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/statusbr.h"
  42     #include "wx/toolbar.h"
  43     #include "wx/dcclient.h"
  44     #include "wx/scrolbar.h"
  45     #include "wx/layout.h"
  46     #include "wx/sizer.h"
  47     #include "wx/menu.h"
  48 #endif //WX_PRECOMP
  49
  50 #if wxUSE_DRAG_AND_DROP
  51     #include "wx/dnd.h"
  52 #endif // wxUSE_DRAG_AND_DROP
  53
  54 #if wxUSE_ACCESSIBILITY
  55     #include "wx/access.h"
  56 #endif
  57
  58 #if wxUSE_HELP
  59     #include "wx/cshelp.h"
  60 #endif // wxUSE_HELP
  61
  62 #if wxUSE_TOOLTIPS
  63     #include "wx/tooltip.h"
  64 #endif // wxUSE_TOOLTIPS
  65
  66 #if wxUSE_CARET
  67     #include "wx/caret.h"
  68 #endif // wxUSE_CARET
  69
  70 #if wxUSE_SYSTEM_OPTIONS
  71     #include "wx/sysopt.h"
  72 #endif
  73
  74 // For reporting compile- and runtime version of GTK+ in the ctrl+alt+mclick dialog.
  75 // The gtk includes don't pull any other headers in, at least not on my system - MR
  76 #ifdef __WXGTK__
  77     #ifdef __WXGTK20__
  78         #include <gtk/gtkversion.h>
  79     #else
  80         #include <gtk/gtkfeatures.h>
  81     #endif
  82 #endif
  83
  84 #include "wx/platinfo.h"
  85
  86 // Windows List
  87 WXDLLIMPEXP_DATA_CORE(wxWindowList) wxTopLevelWindows;
  88
  89 // globals
  90 #if wxUSE_MENUS
  91 wxMenu *wxCurrentPopupMenu = NULL;
  92 #endif // wxUSE_MENUS
  93
  94 // ----------------------------------------------------------------------------
  95 // static data
  96 // ----------------------------------------------------------------------------
  97
  98
  99 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
 100
 101 // ----------------------------------------------------------------------------
 102 // event table
 103 // ----------------------------------------------------------------------------
 104
 105 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
 106     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
 107     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
 108     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
 109
 110 #if wxUSE_HELP
 111     EVT_HELP(wxID_ANY, wxWindowBase::OnHelp)
 112 #endif // wxUSE_HELP
 113
 114 END_EVENT_TABLE()
 115
 116 // ============================================================================
 117 // implementation of the common functionality of the wxWindow class
 118 // ============================================================================
 119
 120 // ----------------------------------------------------------------------------
 121 // initialization
 122 // ----------------------------------------------------------------------------
 123
 124 // the default initialization
 125 wxWindowBase::wxWindowBase()
 126 {
 127     // no window yet, no parent nor children
 128     m_parent = NULL;
 129     m_windowId = wxID_ANY;
 130
 131     // no constraints on the minimal window size
 132     m_minWidth =
 133     m_maxWidth = wxDefaultCoord;
 134     m_minHeight =
 135     m_maxHeight = wxDefaultCoord;
 136
 137     // invalidiated cache value
 138     m_bestSizeCache = wxDefaultSize;
 139
 140     // window are created enabled and visible by default
 141     m_isShown =
 142     m_isEnabled = true;
 143
 144     // the default event handler is just this window
 145     m_eventHandler = this;
 146
 147 #if wxUSE_VALIDATORS
 148     // no validator
 149     m_windowValidator = NULL;
 150 #endif // wxUSE_VALIDATORS
 151
 152     // the colours/fonts are default for now, so leave m_font,
 153     // m_backgroundColour and m_foregroundColour uninitialized and set those
 154     m_hasBgCol =
 155     m_hasFgCol =
 156     m_hasFont = false;
 157     m_inheritBgCol =
 158     m_inheritFgCol =
 159     m_inheritFont = false;
 160
 161     // no style bits
 162     m_exStyle =
 163     m_windowStyle = 0;
 164
 165     m_backgroundStyle = wxBG_STYLE_SYSTEM;
 166
 167 #if wxUSE_CONSTRAINTS
 168     // no constraints whatsoever
 169     m_constraints = NULL;
 170     m_constraintsInvolvedIn = NULL;
 171 #endif // wxUSE_CONSTRAINTS
 172
 173     m_windowSizer = NULL;
 174     m_containingSizer = NULL;
 175     m_autoLayout = false;
 176
 177 #if wxUSE_DRAG_AND_DROP
 178     m_dropTarget = NULL;
 179 #endif // wxUSE_DRAG_AND_DROP
 180
 181 #if wxUSE_TOOLTIPS
 182     m_tooltip = NULL;
 183 #endif // wxUSE_TOOLTIPS
 184
 185 #if wxUSE_CARET
 186     m_caret = NULL;
 187 #endif // wxUSE_CARET
 188
 189 #if wxUSE_PALETTE
 190     m_hasCustomPalette = false;
 191 #endif // wxUSE_PALETTE
 192
 193 #if wxUSE_ACCESSIBILITY
 194     m_accessible = NULL;
 195 #endif
 196
 197     m_virtualSize = wxDefaultSize;
 198
 199     m_scrollHelper = NULL;
 200
 201     m_windowVariant = wxWINDOW_VARIANT_NORMAL;
 202 #if wxUSE_SYSTEM_OPTIONS
 203     if ( wxSystemOptions::HasOption(wxWINDOW_DEFAULT_VARIANT) )
 204     {
 205        m_windowVariant = (wxWindowVariant) wxSystemOptions::GetOptionInt( wxWINDOW_DEFAULT_VARIANT ) ;
 206     }
 207 #endif
 208
 209     // Whether we're using the current theme for this window (wxGTK only for now)
 210     m_themeEnabled = false;
 211
 212     // This is set to true by SendDestroyEvent() which should be called by the
 213     // most derived class to ensure that the destruction event is sent as soon
 214     // as possible to allow its handlers to still see the undestroyed window
 215     m_isBeingDeleted = false;
 216
 217     m_freezeCount = 0;
 218 }
 219
 220 // common part of window creation process
 221 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 222                               wxWindowID id,
 223                               const wxPoint& WXUNUSED(pos),
 224                               const wxSize& WXUNUSED(size),
 225                               long style,
 226                               const wxValidator& wxVALIDATOR_PARAM(validator),
 227                               const wxString& name)
 228 {
 229 #if wxUSE_STATBOX
 230     // wxGTK doesn't allow to create controls with static box as the parent so
 231     // this will result in a crash when the program is ported to wxGTK so warn
 232     // the user about it
 233
 234     // if you get this assert, the correct solution is to create the controls
 235     // as siblings of the static box
 236     wxASSERT_MSG( !parent || !wxDynamicCast(parent, wxStaticBox),
 237                   _T("wxStaticBox can't be used as a window parent!") );
 238 #endif // wxUSE_STATBOX
 239
 240     // ids are limited to 16 bits under MSW so if you care about portability,
 241     // it's not a good idea to use ids out of this range (and negative ids are
 242     // reserved for wxWidgets own usage)
 243     wxASSERT_MSG( id == wxID_ANY || (id >= 0 && id < 32767) ||
 244                   (id >= wxID_AUTO_LOWEST && id <= wxID_AUTO_HIGHEST),
 245                   _T("invalid id value") );
 246
 247     // generate a new id if the user doesn't care about it
 248     if ( id == wxID_ANY )
 249     {
 250         m_windowId = NewControlId();
 251     }
 252     else // valid id specified
 253     {
 254         m_windowId = id;
 255     }
 256
 257     // don't use SetWindowStyleFlag() here, this function should only be called
 258     // to change the flag after creation as it tries to reflect the changes in
 259     // flags by updating the window dynamically and we don't need this here
 260     m_windowStyle = style;
 261
 262     SetName(name);
 263     SetParent(parent);
 264
 265 #if wxUSE_VALIDATORS
 266     SetValidator(validator);
 267 #endif // wxUSE_VALIDATORS
 268
 269     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 270     // have it too - like this it's possible to set it only in the top level
 271     // dialog/frame and all children will inherit it by defult
 272     if ( parent && (parent->GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 273     {
 274         SetExtraStyle(GetExtraStyle() | wxWS_EX_VALIDATE_RECURSIVELY);
 275     }
 276
 277     return true;
 278 }
 279
 280 bool wxWindowBase::ToggleWindowStyle(int flag)
 281 {
 282     wxASSERT_MSG( flag, _T("flags with 0 value can't be toggled") );
 283
 284     bool rc;
 285     long style = GetWindowStyleFlag();
 286     if ( style & flag )
 287     {
 288         style &= ~flag;
 289         rc = false;
 290     }
 291     else // currently off
 292     {
 293         style |= flag;
 294         rc = true;
 295     }
 296
 297     SetWindowStyleFlag(style);
 298
 299     return rc;
 300 }
 301
 302 // ----------------------------------------------------------------------------
 303 // destruction
 304 // ----------------------------------------------------------------------------
 305
 306 // common clean up
 307 wxWindowBase::~wxWindowBase()
 308 {
 309     wxASSERT_MSG( GetCapture() != this, wxT("attempt to destroy window with mouse capture") );
 310
 311     // FIXME if these 2 cases result from programming errors in the user code
 312     //       we should probably assert here instead of silently fixing them
 313
 314     // Just in case the window has been Closed, but we're then deleting
 315     // immediately: don't leave dangling pointers.
 316     wxPendingDelete.DeleteObject(this);
 317
 318     // Just in case we've loaded a top-level window via LoadNativeDialog but
 319     // we weren't a dialog class
 320     wxTopLevelWindows.DeleteObject((wxWindow*)this);
 321
 322 #if wxUSE_MENUS
 323     // The associated popup menu can still be alive, disassociate from it in
 324     // this case
 325     if ( wxCurrentPopupMenu && wxCurrentPopupMenu->GetInvokingWindow() == this )
 326         wxCurrentPopupMenu->SetInvokingWindow(NULL);
 327 #endif // wxUSE_MENUS
 328
 329     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 330
 331     // notify the parent about this window destruction
 332     if ( m_parent )
 333         m_parent->RemoveChild(this);
 334
 335 #if wxUSE_CARET
 336     delete m_caret;
 337 #endif // wxUSE_CARET
 338
 339 #if wxUSE_VALIDATORS
 340     delete m_windowValidator;
 341 #endif // wxUSE_VALIDATORS
 342
 343 #if wxUSE_CONSTRAINTS
 344     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 345     // at deleted windows as they delete themselves.
 346     DeleteRelatedConstraints();
 347
 348     if ( m_constraints )
 349     {
 350         // This removes any dangling pointers to this window in other windows'
 351         // constraintsInvolvedIn lists.
 352         UnsetConstraints(m_constraints);
 353         delete m_constraints;
 354         m_constraints = NULL;
 355     }
 356 #endif // wxUSE_CONSTRAINTS
 357
 358     if ( m_containingSizer )
 359         m_containingSizer->Detach( (wxWindow*)this );
 360
 361     delete m_windowSizer;
 362
 363 #if wxUSE_DRAG_AND_DROP
 364     delete m_dropTarget;
 365 #endif // wxUSE_DRAG_AND_DROP
 366
 367 #if wxUSE_TOOLTIPS
 368     delete m_tooltip;
 369 #endif // wxUSE_TOOLTIPS
 370
 371 #if wxUSE_ACCESSIBILITY
 372     delete m_accessible;
 373 #endif
 374
 375 #if wxUSE_HELP
 376     // NB: this has to be called unconditionally, because we don't know
 377     //     whether this window has associated help text or not
 378     wxHelpProvider *helpProvider = wxHelpProvider::Get();
 379     if ( helpProvider )
 380         helpProvider->RemoveHelp(this);
 381 #endif
 382 }
 383
 384 bool wxWindowBase::IsBeingDeleted() const
 385 {
 386     return m_isBeingDeleted ||
 387             (!IsTopLevel() && m_parent && m_parent->IsBeingDeleted());
 388 }
 389
 390 void wxWindowBase::SendDestroyEvent()
 391 {
 392     if ( m_isBeingDeleted )
 393     {
 394         // we could have been already called from a more derived class dtor,
 395         // e.g. ~wxTLW calls us and so does ~wxWindow and the latter call
 396         // should be simply ignored
 397         return;
 398     }
 399
 400     m_isBeingDeleted = true;
 401
 402     wxWindowDestroyEvent event;
 403     event.SetEventObject(this);
 404     event.SetId(GetId());
 405     GetEventHandler()->ProcessEvent(event);
 406 }
 407
 408 bool wxWindowBase::Destroy()
 409 {
 410     SendDestroyEvent();
 411
 412     delete this;
 413
 414     return true;
 415 }
 416
 417 bool wxWindowBase::Close(bool force)
 418 {
 419     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 420     event.SetEventObject(this);
 421     event.SetCanVeto(!force);
 422
 423     // return false if window wasn't closed because the application vetoed the
 424     // close event
 425     return HandleWindowEvent(event) && !event.GetVeto();
 426 }
 427
 428 bool wxWindowBase::DestroyChildren()
 429 {
 430     wxWindowList::compatibility_iterator node;
 431     for ( ;; )
 432     {
 433         // we iterate until the list becomes empty
 434         node = GetChildren().GetFirst();
 435         if ( !node )
 436             break;
 437
 438         wxWindow *child = node->GetData();
 439
 440         // note that we really want to delete it immediately so don't call the
 441         // possible overridden Destroy() version which might not delete the
 442         // child immediately resulting in problems with our (top level) child
 443         // outliving its parent
 444         child->wxWindowBase::Destroy();
 445
 446         wxASSERT_MSG( !GetChildren().Find(child),
 447                       wxT("child didn't remove itself using RemoveChild()") );
 448     }
 449
 450     return true;
 451 }
 452
 453 // ----------------------------------------------------------------------------
 454 // size/position related methods
 455 // ----------------------------------------------------------------------------
 456
 457 // centre the window with respect to its parent in either (or both) directions
 458 void wxWindowBase::DoCentre(int dir)
 459 {
 460     wxCHECK_RET( !(dir & wxCENTRE_ON_SCREEN) && GetParent(),
 461                  _T("this method only implements centering child windows") );
 462
 463     SetSize(GetRect().CentreIn(GetParent()->GetClientSize(), dir));
 464 }
 465
 466 // fits the window around the children
 467 void wxWindowBase::Fit()
 468 {
 469     if ( !GetChildren().empty() )
 470     {
 471         SetSize(GetBestSize());
 472     }
 473     //else: do nothing if we have no children
 474 }
 475
 476 // fits virtual size (ie. scrolled area etc.) around children
 477 void wxWindowBase::FitInside()
 478 {
 479     if ( GetChildren().GetCount() > 0 )
 480     {
 481         SetVirtualSize( GetBestVirtualSize() );
 482     }
 483 }
 484
 485 // On Mac, scrollbars are explicitly children.
 486 #ifdef __WXMAC__
 487 static bool wxHasRealChildren(const wxWindowBase* win)
 488 {
 489     int realChildCount = 0;
 490
 491     for ( wxWindowList::compatibility_iterator node = win->GetChildren().GetFirst();
 492           node;
 493           node = node->GetNext() )
 494     {
 495         wxWindow *win = node->GetData();
 496         if ( !win->IsTopLevel() && win->IsShown() && !win->IsKindOf(CLASSINFO(wxScrollBar)))
 497             realChildCount ++;
 498     }
 499     return (realChildCount > 0);
 500 }
 501 #endif
 502
 503 void wxWindowBase::InvalidateBestSize()
 504 {
 505     m_bestSizeCache = wxDefaultSize;
 506
 507     // parent's best size calculation may depend on its children's
 508     // as long as child window we are in is not top level window itself
 509     // (because the TLW size is never resized automatically)
 510     // so let's invalidate it as well to be safe:
 511     if (m_parent && !IsTopLevel())
 512         m_parent->InvalidateBestSize();
 513 }
 514
 515 // return the size best suited for the current window
 516 wxSize wxWindowBase::DoGetBestSize() const
 517 {
 518     wxSize best;
 519
 520     if ( m_windowSizer )
 521     {
 522         best = m_windowSizer->GetMinSize();
 523     }
 524 #if wxUSE_CONSTRAINTS
 525     else if ( m_constraints )
 526     {
 527         wxConstCast(this, wxWindowBase)->SatisfyConstraints();
 528
 529         // our minimal acceptable size is such that all our windows fit inside
 530         int maxX = 0,
 531             maxY = 0;
 532
 533         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 534               node;
 535               node = node->GetNext() )
 536         {
 537             wxLayoutConstraints *c = node->GetData()->GetConstraints();
 538             if ( !c )
 539             {
 540                 // it's not normal that we have an unconstrained child, but
 541                 // what can we do about it?
 542                 continue;
 543             }
 544
 545             int x = c->right.GetValue(),
 546                 y = c->bottom.GetValue();
 547
 548             if ( x > maxX )
 549                 maxX = x;
 550
 551             if ( y > maxY )
 552                 maxY = y;
 553
 554             // TODO: we must calculate the overlaps somehow, otherwise we
 555             //       will never return a size bigger than the current one :-(
 556         }
 557
 558         best = wxSize(maxX, maxY);
 559     }
 560 #endif // wxUSE_CONSTRAINTS
 561     else if ( !GetChildren().empty()
 562 #ifdef __WXMAC__
 563               && wxHasRealChildren(this)
 564 #endif
 565               )
 566     {
 567         // our minimal acceptable size is such that all our visible child
 568         // windows fit inside
 569         int maxX = 0,
 570             maxY = 0;
 571
 572         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 573               node;
 574               node = node->GetNext() )
 575         {
 576             wxWindow *win = node->GetData();
 577             if ( win->IsTopLevel()
 578                     || !win->IsShown()
 579 #if wxUSE_STATUSBAR
 580                         || wxDynamicCast(win, wxStatusBar)
 581 #endif // wxUSE_STATUSBAR
 582                )
 583             {
 584                 // dialogs and frames lie in different top level windows -
 585                 // don't deal with them here; as for the status bars, they
 586                 // don't lie in the client area at all
 587                 continue;
 588             }
 589
 590             int wx, wy, ww, wh;
 591             win->GetPosition(&wx, &wy);
 592
 593             // if the window hadn't been positioned yet, assume that it is in
 594             // the origin
 595             if ( wx == wxDefaultCoord )
 596                 wx = 0;
 597             if ( wy == wxDefaultCoord )
 598                 wy = 0;
 599
 600             win->GetSize(&ww, &wh);
 601             if ( wx + ww > maxX )
 602                 maxX = wx + ww;
 603             if ( wy + wh > maxY )
 604                 maxY = wy + wh;
 605         }
 606
 607         best = wxSize(maxX, maxY);
 608     }
 609     else // ! has children
 610     {
 611         // for a generic window there is no natural best size so, if the
 612         // minimal size is not set, use the current size but take care to
 613         // remember it as minimal size for the next time because our best size
 614         // should be constant: otherwise we could get into a situation when the
 615         // window is initially at some size, then expanded to a larger size and
 616         // then, when the containing window is shrunk back (because our initial
 617         // best size had been used for computing the parent min size), we can't
 618         // be shrunk back any more because our best size is now bigger
 619         wxSize size = GetMinSize();
 620         if ( !size.IsFullySpecified() )
 621         {
 622             size.SetDefaults(GetSize());
 623             wxConstCast(this, wxWindowBase)->SetMinSize(size);
 624         }
 625
 626         // return as-is, unadjusted by the client size difference.
 627         return size;
 628     }
 629
 630     // Add any difference between size and client size
 631     wxSize diff = GetSize() - GetClientSize();
 632     best.x += wxMax(0, diff.x);
 633     best.y += wxMax(0, diff.y);
 634
 635     return best;
 636 }
 637
 638 // helper of GetWindowBorderSize(): as many ports don't implement support for
 639 // wxSYS_BORDER/EDGE_X/Y metrics in their wxSystemSettings, use hard coded
 640 // fallbacks in this case
 641 static int wxGetMetricOrDefault(wxSystemMetric what, const wxWindowBase* win)
 642 {
 643     int rc = wxSystemSettings::GetMetric(
 644         what, static_cast<wxWindow*>(const_cast<wxWindowBase*>(win)));
 645     if ( rc == -1 )
 646     {
 647         switch ( what )
 648         {
 649             case wxSYS_BORDER_X:
 650             case wxSYS_BORDER_Y:
 651                 // 2D border is by default 1 pixel wide
 652                 rc = 1;
 653                 break;
 654
 655             case wxSYS_EDGE_X:
 656             case wxSYS_EDGE_Y:
 657                 // 3D borders are by default 2 pixels
 658                 rc = 2;
 659                 break;
 660
 661             default:
 662                 wxFAIL_MSG( _T("unexpected wxGetMetricOrDefault() argument") );
 663                 rc = 0;
 664         }
 665     }
 666
 667     return rc;
 668 }
 669
 670 wxSize wxWindowBase::GetWindowBorderSize() const
 671 {
 672     wxSize size;
 673
 674     switch ( GetBorder() )
 675     {
 676         case wxBORDER_NONE:
 677             // nothing to do, size is already (0, 0)
 678             break;
 679
 680         case wxBORDER_SIMPLE:
 681         case wxBORDER_STATIC:
 682             size.x = wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 683             size.y = wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 684             break;
 685
 686         case wxBORDER_SUNKEN:
 687         case wxBORDER_RAISED:
 688             size.x = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_X, this),
 689                            wxGetMetricOrDefault(wxSYS_BORDER_X, this));
 690             size.y = wxMax(wxGetMetricOrDefault(wxSYS_EDGE_Y, this),
 691                            wxGetMetricOrDefault(wxSYS_BORDER_Y, this));
 692             break;
 693
 694         case wxBORDER_DOUBLE:
 695             size.x = wxGetMetricOrDefault(wxSYS_EDGE_X, this) +
 696                         wxGetMetricOrDefault(wxSYS_BORDER_X, this);
 697             size.y = wxGetMetricOrDefault(wxSYS_EDGE_Y, this) +
 698                         wxGetMetricOrDefault(wxSYS_BORDER_Y, this);
 699             break;
 700
 701         default:
 702             wxFAIL_MSG(_T("Unknown border style."));
 703             break;
 704     }
 705
 706     // we have borders on both sides
 707     return size*2;
 708 }
 709
 710 wxSize wxWindowBase::GetEffectiveMinSize() const
 711 {
 712     // merge the best size with the min size, giving priority to the min size
 713     wxSize min = GetMinSize();
 714
 715     if (min.x == wxDefaultCoord || min.y == wxDefaultCoord)
 716     {
 717         wxSize best = GetBestSize();
 718         if (min.x == wxDefaultCoord) min.x =  best.x;
 719         if (min.y == wxDefaultCoord) min.y =  best.y;
 720     }
 721
 722     return min;
 723 }
 724
 725 wxSize wxWindowBase::GetBestSize() const
 726 {
 727     if ((!m_windowSizer) && (m_bestSizeCache.IsFullySpecified()))
 728         return m_bestSizeCache;
 729
 730     return DoGetBestSize();
 731 }
 732
 733 void wxWindowBase::SetMinSize(const wxSize& minSize)
 734 {
 735     m_minWidth = minSize.x;
 736     m_minHeight = minSize.y;
 737 }
 738
 739 void wxWindowBase::SetMaxSize(const wxSize& maxSize)
 740 {
 741     m_maxWidth = maxSize.x;
 742     m_maxHeight = maxSize.y;
 743 }
 744
 745 void wxWindowBase::SetInitialSize(const wxSize& size)
 746 {
 747     // Set the min size to the size passed in.  This will usually either be
 748     // wxDefaultSize or the size passed to this window's ctor/Create function.
 749     SetMinSize(size);
 750
 751     // Merge the size with the best size if needed
 752     wxSize best = GetEffectiveMinSize();
 753
 754     // If the current size doesn't match then change it
 755     if (GetSize() != best)
 756         SetSize(best);
 757 }
 758
 759
 760 // by default the origin is not shifted
 761 wxPoint wxWindowBase::GetClientAreaOrigin() const
 762 {
 763     return wxPoint(0,0);
 764 }
 765
 766 wxSize wxWindowBase::ClientToWindowSize(const wxSize& size) const
 767 {
 768     const wxSize diff(GetSize() - GetClientSize());
 769
 770     return wxSize(size.x == -1 ? -1 : size.x + diff.x,
 771                   size.y == -1 ? -1 : size.y + diff.y);
 772 }
 773
 774 wxSize wxWindowBase::WindowToClientSize(const wxSize& size) const
 775 {
 776     const wxSize diff(GetSize() - GetClientSize());
 777
 778     return wxSize(size.x == -1 ? -1 : size.x - diff.x,
 779                   size.y == -1 ? -1 : size.y - diff.y);
 780 }
 781
 782 void wxWindowBase::SetWindowVariant( wxWindowVariant variant )
 783 {
 784     if ( m_windowVariant != variant )
 785     {
 786         m_windowVariant = variant;
 787
 788         DoSetWindowVariant(variant);
 789     }
 790 }
 791
 792 void wxWindowBase::DoSetWindowVariant( wxWindowVariant variant )
 793 {
 794     // adjust the font height to correspond to our new variant (notice that
 795     // we're only called if something really changed)
 796     wxFont font = GetFont();
 797     int size = font.GetPointSize();
 798     switch ( variant )
 799     {
 800         case wxWINDOW_VARIANT_NORMAL:
 801             break;
 802
 803         case wxWINDOW_VARIANT_SMALL:
 804             size *= 3;
 805             size /= 4;
 806             break;
 807
 808         case wxWINDOW_VARIANT_MINI:
 809             size *= 2;
 810             size /= 3;
 811             break;
 812
 813         case wxWINDOW_VARIANT_LARGE:
 814             size *= 5;
 815             size /= 4;
 816             break;
 817
 818         default:
 819             wxFAIL_MSG(_T("unexpected window variant"));
 820             break;
 821     }
 822
 823     font.SetPointSize(size);
 824     SetFont(font);
 825 }
 826
 827 void wxWindowBase::DoSetSizeHints( int minW, int minH,
 828                                    int maxW, int maxH,
 829                                    int WXUNUSED(incW), int WXUNUSED(incH) )
 830 {
 831     wxCHECK_RET( (minW == wxDefaultCoord || maxW == wxDefaultCoord || minW <= maxW) &&
 832                     (minH == wxDefaultCoord || maxH == wxDefaultCoord || minH <= maxH),
 833                  _T("min width/height must be less than max width/height!") );
 834
 835     m_minWidth = minW;
 836     m_maxWidth = maxW;
 837     m_minHeight = minH;
 838     m_maxHeight = maxH;
 839 }
 840
 841
 842 #if WXWIN_COMPATIBILITY_2_8
 843 void wxWindowBase::SetVirtualSizeHints(int WXUNUSED(minW), int WXUNUSED(minH),
 844                                        int WXUNUSED(maxW), int WXUNUSED(maxH))
 845 {
 846 }
 847
 848 void wxWindowBase::SetVirtualSizeHints(const wxSize& WXUNUSED(minsize),
 849                                        const wxSize& WXUNUSED(maxsize))
 850 {
 851 }
 852 #endif // WXWIN_COMPATIBILITY_2_8
 853
 854 void wxWindowBase::DoSetVirtualSize( int x, int y )
 855 {
 856     m_virtualSize = wxSize(x, y);
 857 }
 858
 859 wxSize wxWindowBase::DoGetVirtualSize() const
 860 {
 861     // we should use the entire client area so if it is greater than our
 862     // virtual size, expand it to fit (otherwise if the window is big enough we
 863     // wouldn't be using parts of it)
 864     wxSize size = GetClientSize();
 865     if ( m_virtualSize.x > size.x )
 866         size.x = m_virtualSize.x;
 867
 868     if ( m_virtualSize.y >= size.y )
 869         size.y = m_virtualSize.y;
 870
 871     return size;
 872 }
 873
 874 void wxWindowBase::DoGetScreenPosition(int *x, int *y) const
 875 {
 876     // screen position is the same as (0, 0) in client coords for non TLWs (and
 877     // TLWs override this method)
 878     if ( x )
 879         *x = 0;
 880     if ( y )
 881         *y = 0;
 882
 883     ClientToScreen(x, y);
 884 }
 885
 886 void wxWindowBase::SendSizeEvent(int flags)
 887 {
 888     wxSizeEvent event(GetSize(), GetId());
 889     event.SetEventObject(this);
 890     if ( flags & wxSEND_EVENT_POST )
 891         wxPostEvent(this, event);
 892     else
 893         HandleWindowEvent(event);
 894 }
 895
 896 void wxWindowBase::SendSizeEventToParent(int flags)
 897 {
 898     wxWindow * const parent = GetParent();
 899     if ( parent && !parent->IsBeingDeleted() )
 900         parent->SendSizeEvent(flags);
 901 }
 902
 903 // ----------------------------------------------------------------------------
 904 // show/hide/enable/disable the window
 905 // ----------------------------------------------------------------------------
 906
 907 bool wxWindowBase::Show(bool show)
 908 {
 909     if ( show != m_isShown )
 910     {
 911         m_isShown = show;
 912
 913         return true;
 914     }
 915     else
 916     {
 917         return false;
 918     }
 919 }
 920
 921 bool wxWindowBase::IsEnabled() const
 922 {
 923     return IsThisEnabled() && (IsTopLevel() || !GetParent() || GetParent()->IsEnabled());
 924 }
 925
 926 void wxWindowBase::NotifyWindowOnEnableChange(bool enabled)
 927 {
 928 #ifndef wxHAS_NATIVE_ENABLED_MANAGEMENT
 929     DoEnable(enabled);
 930 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 931
 932     OnEnabled(enabled);
 933
 934     // If we are top-level then the logic doesn't apply - otherwise
 935     // showing a modal dialog would result in total greying out (and ungreying
 936     // out later) of everything which would be really ugly
 937     if ( IsTopLevel() )
 938         return;
 939
 940     for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
 941           node;
 942           node = node->GetNext() )
 943     {
 944         wxWindowBase * const child = node->GetData();
 945         if ( !child->IsTopLevel() && child->IsThisEnabled() )
 946             child->NotifyWindowOnEnableChange(enabled);
 947     }
 948 }
 949
 950 bool wxWindowBase::Enable(bool enable)
 951 {
 952     if ( enable == IsThisEnabled() )
 953         return false;
 954
 955     m_isEnabled = enable;
 956
 957 #ifdef wxHAS_NATIVE_ENABLED_MANAGEMENT
 958     DoEnable(enable);
 959 #else // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 960     wxWindowBase * const parent = GetParent();
 961     if( !IsTopLevel() && parent && !parent->IsEnabled() )
 962     {
 963         return true;
 964     }
 965 #endif // !defined(wxHAS_NATIVE_ENABLED_MANAGEMENT)
 966
 967     NotifyWindowOnEnableChange(enable);
 968
 969     return true;
 970 }
 971
 972 bool wxWindowBase::IsShownOnScreen() const
 973 {
 974     // A window is shown on screen if it itself is shown and so are all its
 975     // parents. But if a window is toplevel one, then its always visible on
 976     // screen if IsShown() returns true, even if it has a hidden parent.
 977     return IsShown() &&
 978            (IsTopLevel() || GetParent() == NULL || GetParent()->IsShownOnScreen());
 979 }
 980
 981 // ----------------------------------------------------------------------------
 982 // RTTI
 983 // ----------------------------------------------------------------------------
 984
 985 bool wxWindowBase::IsTopLevel() const
 986 {
 987     return false;
 988 }
 989
 990 // ----------------------------------------------------------------------------
 991 // Freeze/Thaw
 992 // ----------------------------------------------------------------------------
 993
 994 void wxWindowBase::Freeze()
 995 {
 996     if ( !m_freezeCount++ )
 997     {
 998         // physically freeze this window:
 999         DoFreeze();
1000
1001         // and recursively freeze all children:
1002         for ( wxWindowList::iterator i = GetChildren().begin();
1003               i != GetChildren().end(); ++i )
1004         {
1005             wxWindow *child = *i;
1006             if ( child->IsTopLevel() )
1007                 continue;
1008
1009             child->Freeze();
1010         }
1011     }
1012 }
1013
1014 void wxWindowBase::Thaw()
1015 {
1016     wxASSERT_MSG( m_freezeCount, "Thaw() without matching Freeze()" );
1017
1018     if ( !--m_freezeCount )
1019     {
1020         // recursively thaw all children:
1021         for ( wxWindowList::iterator i = GetChildren().begin();
1022               i != GetChildren().end(); ++i )
1023         {
1024             wxWindow *child = *i;
1025             if ( child->IsTopLevel() )
1026                 continue;
1027
1028             child->Thaw();
1029         }
1030
1031         // physically thaw this window:
1032         DoThaw();
1033     }
1034 }
1035
1036 // ----------------------------------------------------------------------------
1037 // reparenting the window
1038 // ----------------------------------------------------------------------------
1039
1040 void wxWindowBase::AddChild(wxWindowBase *child)
1041 {
1042     wxCHECK_RET( child, wxT("can't add a NULL child") );
1043
1044     // this should never happen and it will lead to a crash later if it does
1045     // because RemoveChild() will remove only one node from the children list
1046     // and the other(s) one(s) will be left with dangling pointers in them
1047     wxASSERT_MSG( !GetChildren().Find((wxWindow*)child), _T("AddChild() called twice") );
1048
1049     GetChildren().Append((wxWindow*)child);
1050     child->SetParent(this);
1051
1052     // adding a child while frozen will assert when thawed, so freeze it as if
1053     // it had been already present when we were frozen
1054     if ( IsFrozen() && !child->IsTopLevel() )
1055         child->Freeze();
1056 }
1057
1058 void wxWindowBase::RemoveChild(wxWindowBase *child)
1059 {
1060     wxCHECK_RET( child, wxT("can't remove a NULL child") );
1061
1062     // removing a child while frozen may result in permanently frozen window
1063     // if used e.g. from Reparent(), so thaw it
1064     //
1065     // NB: IsTopLevel() doesn't return true any more when a TLW child is being
1066     //     removed from its ~wxWindowBase, so check for IsBeingDeleted() too
1067     if ( IsFrozen() && !child->IsBeingDeleted() && !child->IsTopLevel() )
1068         child->Thaw();
1069
1070     GetChildren().DeleteObject((wxWindow *)child);
1071     child->SetParent(NULL);
1072 }
1073
1074 bool wxWindowBase::Reparent(wxWindowBase *newParent)
1075 {
1076     wxWindow *oldParent = GetParent();
1077     if ( newParent == oldParent )
1078     {
1079         // nothing done
1080         return false;
1081     }
1082
1083     const bool oldEnabledState = IsEnabled();
1084
1085     // unlink this window from the existing parent.
1086     if ( oldParent )
1087     {
1088         oldParent->RemoveChild(this);
1089     }
1090     else
1091     {
1092         wxTopLevelWindows.DeleteObject((wxWindow *)this);
1093     }
1094
1095     // add it to the new one
1096     if ( newParent )
1097     {
1098         newParent->AddChild(this);
1099     }
1100     else
1101     {
1102         wxTopLevelWindows.Append((wxWindow *)this);
1103     }
1104
1105     // We need to notify window (and its subwindows) if by changing the parent
1106     // we also change our enabled/disabled status.
1107     const bool newEnabledState = IsEnabled();
1108     if ( newEnabledState != oldEnabledState )
1109     {
1110         NotifyWindowOnEnableChange(newEnabledState);
1111     }
1112
1113     return true;
1114 }
1115
1116 // ----------------------------------------------------------------------------
1117 // event handler stuff
1118 // ----------------------------------------------------------------------------
1119
1120 void wxWindowBase::SetEventHandler(wxEvtHandler *handler)
1121 {
1122     wxCHECK_RET(handler != NULL, "SetEventHandler(NULL) called");
1123
1124     m_eventHandler = handler;
1125 }
1126
1127 void wxWindowBase::SetNextHandler(wxEvtHandler *WXUNUSED(handler))
1128 {
1129     // disable wxEvtHandler chain mechanism for wxWindows:
1130     // wxWindow uses its own stack mechanism which doesn't mix well with wxEvtHandler's one
1131
1132     wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1133 }
1134 void wxWindowBase::SetPreviousHandler(wxEvtHandler *WXUNUSED(handler))
1135 {
1136     // we can't simply wxFAIL here as in SetNextHandler: in fact the last
1137     // handler of our stack when is destroyed will be Unlink()ed and thus
1138     // will call this function to update the pointer of this window...
1139
1140     //wxFAIL_MSG("wxWindow cannot be part of a wxEvtHandler chain");
1141 }
1142
1143 void wxWindowBase::PushEventHandler(wxEvtHandler *handlerToPush)
1144 {
1145     wxCHECK_RET( handlerToPush != NULL, "PushEventHandler(NULL) called" );
1146
1147     // the new handler is going to be part of the wxWindow stack of event handlers:
1148     // it can't be part also of an event handler double-linked chain:
1149     wxASSERT_MSG(handlerToPush->IsUnlinked(),
1150         "The handler being pushed in the wxWindow stack shouldn't be part of "
1151         "a wxEvtHandler chain; call Unlink() on it first");
1152
1153     wxEvtHandler *handlerOld = GetEventHandler();
1154     wxCHECK_RET( handlerOld, "an old event handler is NULL?" );
1155
1156     // now use wxEvtHandler double-linked list to implement a stack:
1157     handlerToPush->SetNextHandler(handlerOld);
1158
1159     if (handlerOld != this)
1160         handlerOld->SetPreviousHandler(handlerToPush);
1161
1162     SetEventHandler(handlerToPush);
1163
1164 #ifdef __WXDEBUG__
1165     // final checks of the operations done above:
1166     wxASSERT_MSG( handlerToPush->GetPreviousHandler() == NULL,
1167         "the first handler of the wxWindow stack should have no previous handlers set" );
1168     wxASSERT_MSG( handlerToPush->GetNextHandler() != NULL,
1169         "the first handler of the wxWindow stack should have non-NULL next handler" );
1170
1171     wxEvtHandler* pLast = handlerToPush;
1172     while (pLast && pLast != this)
1173         pLast = pLast->GetNextHandler();
1174     wxASSERT_MSG( pLast->GetNextHandler() == NULL,
1175         "the last handler of the wxWindow stack should have this window as next handler" );
1176 #endif
1177 }
1178
1179 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
1180 {
1181     // we need to pop the wxWindow stack, i.e. we need to remove the first handler
1182
1183     wxEvtHandler *firstHandler = GetEventHandler();
1184     wxCHECK_MSG( firstHandler != NULL, NULL, "wxWindow cannot have a NULL event handler" );
1185     wxCHECK_MSG( firstHandler != this, NULL, "cannot pop the wxWindow itself" );
1186     wxCHECK_MSG( firstHandler->GetPreviousHandler() == NULL, NULL,
1187         "the first handler of the wxWindow stack should have no previous handlers set" );
1188
1189     wxEvtHandler *secondHandler = firstHandler->GetNextHandler();
1190     wxCHECK_MSG( secondHandler != NULL, NULL,
1191         "the first handler of the wxWindow stack should have non-NULL next handler" );
1192
1193     firstHandler->SetNextHandler(NULL);
1194     secondHandler->SetPreviousHandler(NULL);
1195
1196     // now firstHandler is completely unlinked; set secondHandler as the new window event handler
1197     SetEventHandler(secondHandler);
1198
1199     if ( deleteHandler )
1200     {
1201         delete firstHandler;
1202         firstHandler = NULL;
1203     }
1204
1205     return firstHandler;
1206 }
1207
1208 bool wxWindowBase::RemoveEventHandler(wxEvtHandler *handlerToRemove)
1209 {
1210     wxCHECK_MSG( handlerToRemove != NULL, false, "RemoveEventHandler(NULL) called" );
1211     wxCHECK_MSG( handlerToRemove != this, false, "Cannot remove the window itself" );
1212
1213     if (handlerToRemove == GetEventHandler())
1214     {
1215         // removing the first event handler is equivalent to "popping" the stack
1216         PopEventHandler(false);
1217         return true;
1218     }
1219
1220     // NOTE: the wxWindow event handler list is always terminated with "this" handler
1221     wxEvtHandler *handlerCur = GetEventHandler()->GetNextHandler();
1222     while ( handlerCur != this )
1223     {
1224         wxEvtHandler *handlerNext = handlerCur->GetNextHandler();
1225
1226         if ( handlerCur == handlerToRemove )
1227         {
1228             handlerCur->Unlink();
1229
1230             wxASSERT_MSG( handlerCur != GetEventHandler(),
1231                         "the case Remove == Pop should was already handled" );
1232             return true;
1233         }
1234
1235         handlerCur = handlerNext;
1236     }
1237
1238     wxFAIL_MSG( _T("where has the event handler gone?") );
1239
1240     return false;
1241 }
1242
1243 bool wxWindowBase::HandleWindowEvent(wxEvent& event) const
1244 {
1245     // SafelyProcessEvent() will handle exceptions nicely
1246     return GetEventHandler()->SafelyProcessEvent(event);
1247 }
1248
1249 // ----------------------------------------------------------------------------
1250 // colours, fonts &c
1251 // ----------------------------------------------------------------------------
1252
1253 void wxWindowBase::InheritAttributes()
1254 {
1255     const wxWindowBase * const parent = GetParent();
1256     if ( !parent )
1257         return;
1258
1259     // we only inherit attributes which had been explicitly set for the parent
1260     // which ensures that this only happens if the user really wants it and
1261     // not by default which wouldn't make any sense in modern GUIs where the
1262     // controls don't all use the same fonts (nor colours)
1263     if ( parent->m_inheritFont && !m_hasFont )
1264         SetFont(parent->GetFont());
1265
1266     // in addition, there is a possibility to explicitly forbid inheriting
1267     // colours at each class level by overriding ShouldInheritColours()
1268     if ( ShouldInheritColours() )
1269     {
1270         if ( parent->m_inheritFgCol && !m_hasFgCol )
1271             SetForegroundColour(parent->GetForegroundColour());
1272
1273         // inheriting (solid) background colour is wrong as it totally breaks
1274         // any kind of themed backgrounds
1275         //
1276         // instead, the controls should use the same background as their parent
1277         // (ideally by not drawing it at all)
1278 #if 0
1279         if ( parent->m_inheritBgCol && !m_hasBgCol )
1280             SetBackgroundColour(parent->GetBackgroundColour());
1281 #endif // 0
1282     }
1283 }
1284
1285 /* static */ wxVisualAttributes
1286 wxWindowBase::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
1287 {
1288     // it is important to return valid values for all attributes from here,
1289     // GetXXX() below rely on this
1290     wxVisualAttributes attrs;
1291     attrs.font = wxSystemSettings::GetFont(wxSYS_DEFAULT_GUI_FONT);
1292     attrs.colFg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT);
1293
1294     // On Smartphone/PocketPC, wxSYS_COLOUR_WINDOW is a better reflection of
1295     // the usual background colour than wxSYS_COLOUR_BTNFACE.
1296     // It's a pity that wxSYS_COLOUR_WINDOW isn't always a suitable background
1297     // colour on other platforms.
1298
1299 #if defined(__WXWINCE__) && (defined(__SMARTPHONE__) || defined(__POCKETPC__))
1300     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW);
1301 #else
1302     attrs.colBg = wxSystemSettings::GetColour(wxSYS_COLOUR_BTNFACE);
1303 #endif
1304     return attrs;
1305 }
1306
1307 wxColour wxWindowBase::GetBackgroundColour() const
1308 {
1309     if ( !m_backgroundColour.IsOk() )
1310     {
1311         wxASSERT_MSG( !m_hasBgCol, _T("we have invalid explicit bg colour?") );
1312
1313         // get our default background colour
1314         wxColour colBg = GetDefaultAttributes().colBg;
1315
1316         // we must return some valid colour to avoid redoing this every time
1317         // and also to avoid surprizing the applications written for older
1318         // wxWidgets versions where GetBackgroundColour() always returned
1319         // something -- so give them something even if it doesn't make sense
1320         // for this window (e.g. it has a themed background)
1321         if ( !colBg.Ok() )
1322             colBg = GetClassDefaultAttributes().colBg;
1323
1324         return colBg;
1325     }
1326     else
1327         return m_backgroundColour;
1328 }
1329
1330 wxColour wxWindowBase::GetForegroundColour() const
1331 {
1332     // logic is the same as above
1333     if ( !m_hasFgCol && !m_foregroundColour.Ok() )
1334     {
1335         wxColour colFg = GetDefaultAttributes().colFg;
1336
1337         if ( !colFg.IsOk() )
1338             colFg = GetClassDefaultAttributes().colFg;
1339
1340         return colFg;
1341     }
1342     else
1343         return m_foregroundColour;
1344 }
1345
1346 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
1347 {
1348     if ( colour == m_backgroundColour )
1349         return false;
1350
1351     m_hasBgCol = colour.IsOk();
1352     if ( m_backgroundStyle != wxBG_STYLE_CUSTOM )
1353         m_backgroundStyle = m_hasBgCol ? wxBG_STYLE_COLOUR : wxBG_STYLE_SYSTEM;
1354
1355     m_inheritBgCol = m_hasBgCol;
1356     m_backgroundColour = colour;
1357     SetThemeEnabled( !m_hasBgCol && !m_foregroundColour.Ok() );
1358     return true;
1359 }
1360
1361 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
1362 {
1363     if (colour == m_foregroundColour )
1364         return false;
1365
1366     m_hasFgCol = colour.IsOk();
1367     m_inheritFgCol = m_hasFgCol;
1368     m_foregroundColour = colour;
1369     SetThemeEnabled( !m_hasFgCol && !m_backgroundColour.Ok() );
1370     return true;
1371 }
1372
1373 bool wxWindowBase::SetCursor(const wxCursor& cursor)
1374 {
1375     // setting an invalid cursor is ok, it means that we don't have any special
1376     // cursor
1377     if ( m_cursor.IsSameAs(cursor) )
1378     {
1379         // no change
1380         return false;
1381     }
1382
1383     m_cursor = cursor;
1384
1385     return true;
1386 }
1387
1388 wxFont wxWindowBase::GetFont() const
1389 {
1390     // logic is the same as in GetBackgroundColour()
1391     if ( !m_font.IsOk() )
1392     {
1393         wxASSERT_MSG( !m_hasFont, _T("we have invalid explicit font?") );
1394
1395         wxFont font = GetDefaultAttributes().font;
1396         if ( !font.IsOk() )
1397             font = GetClassDefaultAttributes().font;
1398
1399         return font;
1400     }
1401     else
1402         return m_font;
1403 }
1404
1405 bool wxWindowBase::SetFont(const wxFont& font)
1406 {
1407     if ( font == m_font )
1408     {
1409         // no change
1410         return false;
1411     }
1412
1413     m_font = font;
1414     m_hasFont = font.IsOk();
1415     m_inheritFont = m_hasFont;
1416
1417     InvalidateBestSize();
1418
1419     return true;
1420 }
1421
1422 #if wxUSE_PALETTE
1423
1424 void wxWindowBase::SetPalette(const wxPalette& pal)
1425 {
1426     m_hasCustomPalette = true;
1427     m_palette = pal;
1428
1429     // VZ: can anyone explain me what do we do here?
1430     wxWindowDC d((wxWindow *) this);
1431     d.SetPalette(pal);
1432 }
1433
1434 wxWindow *wxWindowBase::GetAncestorWithCustomPalette() const
1435 {
1436     wxWindow *win = (wxWindow *)this;
1437     while ( win && !win->HasCustomPalette() )
1438     {
1439         win = win->GetParent();
1440     }
1441
1442     return win;
1443 }
1444
1445 #endif // wxUSE_PALETTE
1446
1447 #if wxUSE_CARET
1448 void wxWindowBase::SetCaret(wxCaret *caret)
1449 {
1450     if ( m_caret )
1451     {
1452         delete m_caret;
1453     }
1454
1455     m_caret = caret;
1456
1457     if ( m_caret )
1458     {
1459         wxASSERT_MSG( m_caret->GetWindow() == this,
1460                       wxT("caret should be created associated to this window") );
1461     }
1462 }
1463 #endif // wxUSE_CARET
1464
1465 #if wxUSE_VALIDATORS
1466 // ----------------------------------------------------------------------------
1467 // validators
1468 // ----------------------------------------------------------------------------
1469
1470 void wxWindowBase::SetValidator(const wxValidator& validator)
1471 {
1472     if ( m_windowValidator )
1473         delete m_windowValidator;
1474
1475     m_windowValidator = (wxValidator *)validator.Clone();
1476
1477     if ( m_windowValidator )
1478         m_windowValidator->SetWindow(this);
1479 }
1480 #endif // wxUSE_VALIDATORS
1481
1482 // ----------------------------------------------------------------------------
1483 // update region stuff
1484 // ----------------------------------------------------------------------------
1485
1486 wxRect wxWindowBase::GetUpdateClientRect() const
1487 {
1488     wxRegion rgnUpdate = GetUpdateRegion();
1489     rgnUpdate.Intersect(GetClientRect());
1490     wxRect rectUpdate = rgnUpdate.GetBox();
1491     wxPoint ptOrigin = GetClientAreaOrigin();
1492     rectUpdate.x -= ptOrigin.x;
1493     rectUpdate.y -= ptOrigin.y;
1494
1495     return rectUpdate;
1496 }
1497
1498 bool wxWindowBase::DoIsExposed(int x, int y) const
1499 {
1500     return m_updateRegion.Contains(x, y) != wxOutRegion;
1501 }
1502
1503 bool wxWindowBase::DoIsExposed(int x, int y, int w, int h) const
1504 {
1505     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
1506 }
1507
1508 void wxWindowBase::ClearBackground()
1509 {
1510     // wxGTK uses its own version, no need to add never used code
1511 #ifndef __WXGTK__
1512     wxClientDC dc((wxWindow *)this);
1513     wxBrush brush(GetBackgroundColour(), wxBRUSHSTYLE_SOLID);
1514     dc.SetBackground(brush);
1515     dc.Clear();
1516 #endif // __WXGTK__
1517 }
1518
1519 // ----------------------------------------------------------------------------
1520 // find child window by id or name
1521 // ----------------------------------------------------------------------------
1522
1523 wxWindow *wxWindowBase::FindWindow(long id) const
1524 {
1525     if ( id == m_windowId )
1526         return (wxWindow *)this;
1527
1528     wxWindowBase *res = NULL;
1529     wxWindowList::compatibility_iterator node;
1530     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1531     {
1532         wxWindowBase *child = node->GetData();
1533         res = child->FindWindow( id );
1534     }
1535
1536     return (wxWindow *)res;
1537 }
1538
1539 wxWindow *wxWindowBase::FindWindow(const wxString& name) const
1540 {
1541     if ( name == m_windowName )
1542         return (wxWindow *)this;
1543
1544     wxWindowBase *res = NULL;
1545     wxWindowList::compatibility_iterator node;
1546     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
1547     {
1548         wxWindow *child = node->GetData();
1549         res = child->FindWindow(name);
1550     }
1551
1552     return (wxWindow *)res;
1553 }
1554
1555
1556 // find any window by id or name or label: If parent is non-NULL, look through
1557 // children for a label or title matching the specified string. If NULL, look
1558 // through all top-level windows.
1559 //
1560 // to avoid duplicating code we reuse the same helper function but with
1561 // different comparators
1562
1563 typedef bool (*wxFindWindowCmp)(const wxWindow *win,
1564                                 const wxString& label, long id);
1565
1566 static
1567 bool wxFindWindowCmpLabels(const wxWindow *win, const wxString& label,
1568                            long WXUNUSED(id))
1569 {
1570     return win->GetLabel() == label;
1571 }
1572
1573 static
1574 bool wxFindWindowCmpNames(const wxWindow *win, const wxString& label,
1575                           long WXUNUSED(id))
1576 {
1577     return win->GetName() == label;
1578 }
1579
1580 static
1581 bool wxFindWindowCmpIds(const wxWindow *win, const wxString& WXUNUSED(label),
1582                         long id)
1583 {
1584     return win->GetId() == id;
1585 }
1586
1587 // recursive helper for the FindWindowByXXX() functions
1588 static
1589 wxWindow *wxFindWindowRecursively(const wxWindow *parent,
1590                                   const wxString& label,
1591                                   long id,
1592                                   wxFindWindowCmp cmp)
1593 {
1594     if ( parent )
1595     {
1596         // see if this is the one we're looking for
1597         if ( (*cmp)(parent, label, id) )
1598             return (wxWindow *)parent;
1599
1600         // It wasn't, so check all its children
1601         for ( wxWindowList::compatibility_iterator node = parent->GetChildren().GetFirst();
1602               node;
1603               node = node->GetNext() )
1604         {
1605             // recursively check each child
1606             wxWindow *win = (wxWindow *)node->GetData();
1607             wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1608             if (retwin)
1609                 return retwin;
1610         }
1611     }
1612
1613     // Not found
1614     return NULL;
1615 }
1616
1617 // helper for FindWindowByXXX()
1618 static
1619 wxWindow *wxFindWindowHelper(const wxWindow *parent,
1620                              const wxString& label,
1621                              long id,
1622                              wxFindWindowCmp cmp)
1623 {
1624     if ( parent )
1625     {
1626         // just check parent and all its children
1627         return wxFindWindowRecursively(parent, label, id, cmp);
1628     }
1629
1630     // start at very top of wx's windows
1631     for ( wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1632           node;
1633           node = node->GetNext() )
1634     {
1635         // recursively check each window & its children
1636         wxWindow *win = node->GetData();
1637         wxWindow *retwin = wxFindWindowRecursively(win, label, id, cmp);
1638         if (retwin)
1639             return retwin;
1640     }
1641
1642     return NULL;
1643 }
1644
1645 /* static */
1646 wxWindow *
1647 wxWindowBase::FindWindowByLabel(const wxString& title, const wxWindow *parent)
1648 {
1649     return wxFindWindowHelper(parent, title, 0, wxFindWindowCmpLabels);
1650 }
1651
1652 /* static */
1653 wxWindow *
1654 wxWindowBase::FindWindowByName(const wxString& title, const wxWindow *parent)
1655 {
1656     wxWindow *win = wxFindWindowHelper(parent, title, 0, wxFindWindowCmpNames);
1657
1658     if ( !win )
1659     {
1660         // fall back to the label
1661         win = FindWindowByLabel(title, parent);
1662     }
1663
1664     return win;
1665 }
1666
1667 /* static */
1668 wxWindow *
1669 wxWindowBase::FindWindowById( long id, const wxWindow* parent )
1670 {
1671     return wxFindWindowHelper(parent, wxEmptyString, id, wxFindWindowCmpIds);
1672 }
1673
1674 // ----------------------------------------------------------------------------
1675 // dialog oriented functions
1676 // ----------------------------------------------------------------------------
1677
1678 void wxWindowBase::MakeModal(bool modal)
1679 {
1680     // Disable all other windows
1681     if ( IsTopLevel() )
1682     {
1683         wxWindowList::compatibility_iterator node = wxTopLevelWindows.GetFirst();
1684         while (node)
1685         {
1686             wxWindow *win = node->GetData();
1687             if (win != this)
1688                 win->Enable(!modal);
1689
1690             node = node->GetNext();
1691         }
1692     }
1693 }
1694
1695 bool wxWindowBase::Validate()
1696 {
1697 #if wxUSE_VALIDATORS
1698     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1699
1700     wxWindowList::compatibility_iterator node;
1701     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1702     {
1703         wxWindowBase *child = node->GetData();
1704         wxValidator *validator = child->GetValidator();
1705         if ( validator && !validator->Validate((wxWindow *)this) )
1706         {
1707             return false;
1708         }
1709
1710         if ( recurse && !child->Validate() )
1711         {
1712             return false;
1713         }
1714     }
1715 #endif // wxUSE_VALIDATORS
1716
1717     return true;
1718 }
1719
1720 bool wxWindowBase::TransferDataToWindow()
1721 {
1722 #if wxUSE_VALIDATORS
1723     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1724
1725     wxWindowList::compatibility_iterator node;
1726     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1727     {
1728         wxWindowBase *child = node->GetData();
1729         wxValidator *validator = child->GetValidator();
1730         if ( validator && !validator->TransferToWindow() )
1731         {
1732             wxLogWarning(_("Could not transfer data to window"));
1733 #if wxUSE_LOG
1734             wxLog::FlushActive();
1735 #endif // wxUSE_LOG
1736
1737             return false;
1738         }
1739
1740         if ( recurse )
1741         {
1742             if ( !child->TransferDataToWindow() )
1743             {
1744                 // warning already given
1745                 return false;
1746             }
1747         }
1748     }
1749 #endif // wxUSE_VALIDATORS
1750
1751     return true;
1752 }
1753
1754 bool wxWindowBase::TransferDataFromWindow()
1755 {
1756 #if wxUSE_VALIDATORS
1757     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
1758
1759     wxWindowList::compatibility_iterator node;
1760     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
1761     {
1762         wxWindow *child = node->GetData();
1763         wxValidator *validator = child->GetValidator();
1764         if ( validator && !validator->TransferFromWindow() )
1765         {
1766             // nop warning here because the application is supposed to give
1767             // one itself - we don't know here what might have gone wrongly
1768
1769             return false;
1770         }
1771
1772         if ( recurse )
1773         {
1774             if ( !child->TransferDataFromWindow() )
1775             {
1776                 // warning already given
1777                 return false;
1778             }
1779         }
1780     }
1781 #endif // wxUSE_VALIDATORS
1782
1783     return true;
1784 }
1785
1786 void wxWindowBase::InitDialog()
1787 {
1788     wxInitDialogEvent event(GetId());
1789     event.SetEventObject( this );
1790     GetEventHandler()->ProcessEvent(event);
1791 }
1792
1793 // ----------------------------------------------------------------------------
1794 // context-sensitive help support
1795 // ----------------------------------------------------------------------------
1796
1797 #if wxUSE_HELP
1798
1799 // associate this help text with this window
1800 void wxWindowBase::SetHelpText(const wxString& text)
1801 {
1802     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1803     if ( helpProvider )
1804     {
1805         helpProvider->AddHelp(this, text);
1806     }
1807 }
1808
1809 #if WXWIN_COMPATIBILITY_2_8
1810 // associate this help text with all windows with the same id as this
1811 // one
1812 void wxWindowBase::SetHelpTextForId(const wxString& text)
1813 {
1814     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1815     if ( helpProvider )
1816     {
1817         helpProvider->AddHelp(GetId(), text);
1818     }
1819 }
1820 #endif // WXWIN_COMPATIBILITY_2_8
1821
1822 // get the help string associated with this window (may be empty)
1823 // default implementation forwards calls to the help provider
1824 wxString
1825 wxWindowBase::GetHelpTextAtPoint(const wxPoint & WXUNUSED(pt),
1826                                  wxHelpEvent::Origin WXUNUSED(origin)) const
1827 {
1828     wxString text;
1829     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1830     if ( helpProvider )
1831     {
1832         text = helpProvider->GetHelp(this);
1833     }
1834
1835     return text;
1836 }
1837
1838 // show help for this window
1839 void wxWindowBase::OnHelp(wxHelpEvent& event)
1840 {
1841     wxHelpProvider *helpProvider = wxHelpProvider::Get();
1842     if ( helpProvider )
1843     {
1844         wxPoint pos = event.GetPosition();
1845         const wxHelpEvent::Origin origin = event.GetOrigin();
1846         if ( origin == wxHelpEvent::Origin_Keyboard )
1847         {
1848             // if the help event was generated from keyboard it shouldn't
1849             // appear at the mouse position (which is still the only position
1850             // associated with help event) if the mouse is far away, although
1851             // we still do use the mouse position if it's over the window
1852             // because we suppose the user looks approximately at the mouse
1853             // already and so it would be more convenient than showing tooltip
1854             // at some arbitrary position which can be quite far from it
1855             const wxRect rectClient = GetClientRect();
1856             if ( !rectClient.Contains(ScreenToClient(pos)) )
1857             {
1858                 // position help slightly under and to the right of this window
1859                 pos = ClientToScreen(wxPoint(
1860                         2*GetCharWidth(),
1861                         rectClient.height + GetCharHeight()
1862                       ));
1863             }
1864         }
1865
1866         if ( helpProvider->ShowHelpAtPoint(this, pos, origin) )
1867         {
1868             // skip the event.Skip() below
1869             return;
1870         }
1871     }
1872
1873     event.Skip();
1874 }
1875
1876 #endif // wxUSE_HELP
1877
1878 // ----------------------------------------------------------------------------
1879 // tooltips
1880 // ----------------------------------------------------------------------------
1881
1882 #if wxUSE_TOOLTIPS
1883
1884 void wxWindowBase::SetToolTip( const wxString &tip )
1885 {
1886     // don't create the new tooltip if we already have one
1887     if ( m_tooltip )
1888     {
1889         m_tooltip->SetTip( tip );
1890     }
1891     else
1892     {
1893         SetToolTip( new wxToolTip( tip ) );
1894     }
1895
1896     // setting empty tooltip text does not remove the tooltip any more - use
1897     // SetToolTip(NULL) for this
1898 }
1899
1900 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
1901 {
1902     if ( m_tooltip != tooltip )
1903     {
1904         if ( m_tooltip )
1905             delete m_tooltip;
1906
1907         m_tooltip = tooltip;
1908     }
1909 }
1910
1911 #endif // wxUSE_TOOLTIPS
1912
1913 // ----------------------------------------------------------------------------
1914 // constraints and sizers
1915 // ----------------------------------------------------------------------------
1916
1917 #if wxUSE_CONSTRAINTS
1918
1919 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
1920 {
1921     if ( m_constraints )
1922     {
1923         UnsetConstraints(m_constraints);
1924         delete m_constraints;
1925     }
1926     m_constraints = constraints;
1927     if ( m_constraints )
1928     {
1929         // Make sure other windows know they're part of a 'meaningful relationship'
1930         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
1931             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
1932         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
1933             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
1934         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
1935             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
1936         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
1937             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
1938         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
1939             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
1940         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
1941             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
1942         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
1943             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
1944         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
1945             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
1946     }
1947 }
1948
1949 // This removes any dangling pointers to this window in other windows'
1950 // constraintsInvolvedIn lists.
1951 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
1952 {
1953     if ( c )
1954     {
1955         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1956             c->left.GetOtherWindow()->RemoveConstraintReference(this);
1957         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
1958             c->top.GetOtherWindow()->RemoveConstraintReference(this);
1959         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
1960             c->right.GetOtherWindow()->RemoveConstraintReference(this);
1961         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
1962             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
1963         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
1964             c->width.GetOtherWindow()->RemoveConstraintReference(this);
1965         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
1966             c->height.GetOtherWindow()->RemoveConstraintReference(this);
1967         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
1968             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
1969         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
1970             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
1971     }
1972 }
1973
1974 // Back-pointer to other windows we're involved with, so if we delete this
1975 // window, we must delete any constraints we're involved with.
1976 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
1977 {
1978     if ( !m_constraintsInvolvedIn )
1979         m_constraintsInvolvedIn = new wxWindowList;
1980     if ( !m_constraintsInvolvedIn->Find((wxWindow *)otherWin) )
1981         m_constraintsInvolvedIn->Append((wxWindow *)otherWin);
1982 }
1983
1984 // REMOVE back-pointer to other windows we're involved with.
1985 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
1986 {
1987     if ( m_constraintsInvolvedIn )
1988         m_constraintsInvolvedIn->DeleteObject((wxWindow *)otherWin);
1989 }
1990
1991 // Reset any constraints that mention this window
1992 void wxWindowBase::DeleteRelatedConstraints()
1993 {
1994     if ( m_constraintsInvolvedIn )
1995     {
1996         wxWindowList::compatibility_iterator node = m_constraintsInvolvedIn->GetFirst();
1997         while (node)
1998         {
1999             wxWindow *win = node->GetData();
2000             wxLayoutConstraints *constr = win->GetConstraints();
2001
2002             // Reset any constraints involving this window
2003             if ( constr )
2004             {
2005                 constr->left.ResetIfWin(this);
2006                 constr->top.ResetIfWin(this);
2007                 constr->right.ResetIfWin(this);
2008                 constr->bottom.ResetIfWin(this);
2009                 constr->width.ResetIfWin(this);
2010                 constr->height.ResetIfWin(this);
2011                 constr->centreX.ResetIfWin(this);
2012                 constr->centreY.ResetIfWin(this);
2013             }
2014
2015             wxWindowList::compatibility_iterator next = node->GetNext();
2016             m_constraintsInvolvedIn->Erase(node);
2017             node = next;
2018         }
2019
2020         delete m_constraintsInvolvedIn;
2021         m_constraintsInvolvedIn = NULL;
2022     }
2023 }
2024
2025 #endif // wxUSE_CONSTRAINTS
2026
2027 void wxWindowBase::SetSizer(wxSizer *sizer, bool deleteOld)
2028 {
2029     if ( sizer == m_windowSizer)
2030         return;
2031
2032     if ( m_windowSizer )
2033     {
2034         m_windowSizer->SetContainingWindow(NULL);
2035
2036         if ( deleteOld )
2037             delete m_windowSizer;
2038     }
2039
2040     m_windowSizer = sizer;
2041     if ( m_windowSizer )
2042     {
2043         m_windowSizer->SetContainingWindow((wxWindow *)this);
2044     }
2045
2046     SetAutoLayout(m_windowSizer != NULL);
2047 }
2048
2049 void wxWindowBase::SetSizerAndFit(wxSizer *sizer, bool deleteOld)
2050 {
2051     SetSizer( sizer, deleteOld );
2052     sizer->SetSizeHints( (wxWindow*) this );
2053 }
2054
2055
2056 void wxWindowBase::SetContainingSizer(wxSizer* sizer)
2057 {
2058     // adding a window to a sizer twice is going to result in fatal and
2059     // hard to debug problems later because when deleting the second
2060     // associated wxSizerItem we're going to dereference a dangling
2061     // pointer; so try to detect this as early as possible
2062     wxASSERT_MSG( !sizer || m_containingSizer != sizer,
2063                   _T("Adding a window to the same sizer twice?") );
2064
2065     m_containingSizer = sizer;
2066 }
2067
2068 #if wxUSE_CONSTRAINTS
2069
2070 void wxWindowBase::SatisfyConstraints()
2071 {
2072     wxLayoutConstraints *constr = GetConstraints();
2073     bool wasOk = constr && constr->AreSatisfied();
2074
2075     ResetConstraints();   // Mark all constraints as unevaluated
2076
2077     int noChanges = 1;
2078
2079     // if we're a top level panel (i.e. our parent is frame/dialog), our
2080     // own constraints will never be satisfied any more unless we do it
2081     // here
2082     if ( wasOk )
2083     {
2084         while ( noChanges > 0 )
2085         {
2086             LayoutPhase1(&noChanges);
2087         }
2088     }
2089
2090     LayoutPhase2(&noChanges);
2091 }
2092
2093 #endif // wxUSE_CONSTRAINTS
2094
2095 bool wxWindowBase::Layout()
2096 {
2097     // If there is a sizer, use it instead of the constraints
2098     if ( GetSizer() )
2099     {
2100         int w = 0, h = 0;
2101         GetVirtualSize(&w, &h);
2102         GetSizer()->SetDimension( 0, 0, w, h );
2103     }
2104 #if wxUSE_CONSTRAINTS
2105     else
2106     {
2107         SatisfyConstraints(); // Find the right constraints values
2108         SetConstraintSizes(); // Recursively set the real window sizes
2109     }
2110 #endif
2111
2112     return true;
2113 }
2114
2115 #if wxUSE_CONSTRAINTS
2116
2117 // first phase of the constraints evaluation: set our own constraints
2118 bool wxWindowBase::LayoutPhase1(int *noChanges)
2119 {
2120     wxLayoutConstraints *constr = GetConstraints();
2121
2122     return !constr || constr->SatisfyConstraints(this, noChanges);
2123 }
2124
2125 // second phase: set the constraints for our children
2126 bool wxWindowBase::LayoutPhase2(int *noChanges)
2127 {
2128     *noChanges = 0;
2129
2130     // Layout children
2131     DoPhase(1);
2132
2133     // Layout grand children
2134     DoPhase(2);
2135
2136     return true;
2137 }
2138
2139 // Do a phase of evaluating child constraints
2140 bool wxWindowBase::DoPhase(int phase)
2141 {
2142     // the list containing the children for which the constraints are already
2143     // set correctly
2144     wxWindowList succeeded;
2145
2146     // the max number of iterations we loop before concluding that we can't set
2147     // the constraints
2148     static const int maxIterations = 500;
2149
2150     for ( int noIterations = 0; noIterations < maxIterations; noIterations++ )
2151     {
2152         int noChanges = 0;
2153
2154         // loop over all children setting their constraints
2155         for ( wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2156               node;
2157               node = node->GetNext() )
2158         {
2159             wxWindow *child = node->GetData();
2160             if ( child->IsTopLevel() )
2161             {
2162                 // top level children are not inside our client area
2163                 continue;
2164             }
2165
2166             if ( !child->GetConstraints() || succeeded.Find(child) )
2167             {
2168                 // this one is either already ok or nothing we can do about it
2169                 continue;
2170             }
2171
2172             int tempNoChanges = 0;
2173             bool success = phase == 1 ? child->LayoutPhase1(&tempNoChanges)
2174                                       : child->LayoutPhase2(&tempNoChanges);
2175             noChanges += tempNoChanges;
2176
2177             if ( success )
2178             {
2179                 succeeded.Append(child);
2180             }
2181         }
2182
2183         if ( !noChanges )
2184         {
2185             // constraints are set
2186             break;
2187         }
2188     }
2189
2190     return true;
2191 }
2192
2193 void wxWindowBase::ResetConstraints()
2194 {
2195     wxLayoutConstraints *constr = GetConstraints();
2196     if ( constr )
2197     {
2198         constr->left.SetDone(false);
2199         constr->top.SetDone(false);
2200         constr->right.SetDone(false);
2201         constr->bottom.SetDone(false);
2202         constr->width.SetDone(false);
2203         constr->height.SetDone(false);
2204         constr->centreX.SetDone(false);
2205         constr->centreY.SetDone(false);
2206     }
2207
2208     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2209     while (node)
2210     {
2211         wxWindow *win = node->GetData();
2212         if ( !win->IsTopLevel() )
2213             win->ResetConstraints();
2214         node = node->GetNext();
2215     }
2216 }
2217
2218 // Need to distinguish between setting the 'fake' size for windows and sizers,
2219 // and setting the real values.
2220 void wxWindowBase::SetConstraintSizes(bool recurse)
2221 {
2222     wxLayoutConstraints *constr = GetConstraints();
2223     if ( constr && constr->AreSatisfied() )
2224     {
2225         int x = constr->left.GetValue();
2226         int y = constr->top.GetValue();
2227         int w = constr->width.GetValue();
2228         int h = constr->height.GetValue();
2229
2230         if ( (constr->width.GetRelationship() != wxAsIs ) ||
2231              (constr->height.GetRelationship() != wxAsIs) )
2232         {
2233             SetSize(x, y, w, h);
2234         }
2235         else
2236         {
2237             // If we don't want to resize this window, just move it...
2238             Move(x, y);
2239         }
2240     }
2241     else if ( constr )
2242     {
2243         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
2244                    GetClassInfo()->GetClassName(),
2245                    GetName().c_str());
2246     }
2247
2248     if ( recurse )
2249     {
2250         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2251         while (node)
2252         {
2253             wxWindow *win = node->GetData();
2254             if ( !win->IsTopLevel() && win->GetConstraints() )
2255                 win->SetConstraintSizes();
2256             node = node->GetNext();
2257         }
2258     }
2259 }
2260
2261 // Only set the size/position of the constraint (if any)
2262 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
2263 {
2264     wxLayoutConstraints *constr = GetConstraints();
2265     if ( constr )
2266     {
2267         if ( x != wxDefaultCoord )
2268         {
2269             constr->left.SetValue(x);
2270             constr->left.SetDone(true);
2271         }
2272         if ( y != wxDefaultCoord )
2273         {
2274             constr->top.SetValue(y);
2275             constr->top.SetDone(true);
2276         }
2277         if ( w != wxDefaultCoord )
2278         {
2279             constr->width.SetValue(w);
2280             constr->width.SetDone(true);
2281         }
2282         if ( h != wxDefaultCoord )
2283         {
2284             constr->height.SetValue(h);
2285             constr->height.SetDone(true);
2286         }
2287     }
2288 }
2289
2290 void wxWindowBase::MoveConstraint(int x, int y)
2291 {
2292     wxLayoutConstraints *constr = GetConstraints();
2293     if ( constr )
2294     {
2295         if ( x != wxDefaultCoord )
2296         {
2297             constr->left.SetValue(x);
2298             constr->left.SetDone(true);
2299         }
2300         if ( y != wxDefaultCoord )
2301         {
2302             constr->top.SetValue(y);
2303             constr->top.SetDone(true);
2304         }
2305     }
2306 }
2307
2308 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
2309 {
2310     wxLayoutConstraints *constr = GetConstraints();
2311     if ( constr )
2312     {
2313         *w = constr->width.GetValue();
2314         *h = constr->height.GetValue();
2315     }
2316     else
2317         GetSize(w, h);
2318 }
2319
2320 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
2321 {
2322     wxLayoutConstraints *constr = GetConstraints();
2323     if ( constr )
2324     {
2325         *w = constr->width.GetValue();
2326         *h = constr->height.GetValue();
2327     }
2328     else
2329         GetClientSize(w, h);
2330 }
2331
2332 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
2333 {
2334     wxLayoutConstraints *constr = GetConstraints();
2335     if ( constr )
2336     {
2337         *x = constr->left.GetValue();
2338         *y = constr->top.GetValue();
2339     }
2340     else
2341         GetPosition(x, y);
2342 }
2343
2344 #endif // wxUSE_CONSTRAINTS
2345
2346 void wxWindowBase::AdjustForParentClientOrigin(int& x, int& y, int sizeFlags) const
2347 {
2348     // don't do it for the dialogs/frames - they float independently of their
2349     // parent
2350     if ( !IsTopLevel() )
2351     {
2352         wxWindow *parent = GetParent();
2353         if ( !(sizeFlags & wxSIZE_NO_ADJUSTMENTS) && parent )
2354         {
2355             wxPoint pt(parent->GetClientAreaOrigin());
2356             x += pt.x;
2357             y += pt.y;
2358         }
2359     }
2360 }
2361
2362 // ----------------------------------------------------------------------------
2363 // Update UI processing
2364 // ----------------------------------------------------------------------------
2365
2366 void wxWindowBase::UpdateWindowUI(long flags)
2367 {
2368     wxUpdateUIEvent event(GetId());
2369     event.SetEventObject(this);
2370
2371     if ( GetEventHandler()->ProcessEvent(event) )
2372     {
2373         DoUpdateWindowUI(event);
2374     }
2375
2376     if (flags & wxUPDATE_UI_RECURSE)
2377     {
2378         wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2379         while (node)
2380         {
2381             wxWindow* child = (wxWindow*) node->GetData();
2382             child->UpdateWindowUI(flags);
2383             node = node->GetNext();
2384         }
2385     }
2386 }
2387
2388 // do the window-specific processing after processing the update event
2389 void wxWindowBase::DoUpdateWindowUI(wxUpdateUIEvent& event)
2390 {
2391     if ( event.GetSetEnabled() )
2392         Enable(event.GetEnabled());
2393
2394     if ( event.GetSetShown() )
2395         Show(event.GetShown());
2396 }
2397
2398 // ----------------------------------------------------------------------------
2399 // dialog units translations
2400 // ----------------------------------------------------------------------------
2401
2402 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
2403 {
2404     int charWidth = GetCharWidth();
2405     int charHeight = GetCharHeight();
2406     wxPoint pt2 = wxDefaultPosition;
2407     if (pt.x != wxDefaultCoord)
2408         pt2.x = (int) ((pt.x * 4) / charWidth);
2409     if (pt.y != wxDefaultCoord)
2410         pt2.y = (int) ((pt.y * 8) / charHeight);
2411
2412     return pt2;
2413 }
2414
2415 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
2416 {
2417     int charWidth = GetCharWidth();
2418     int charHeight = GetCharHeight();
2419     wxPoint pt2 = wxDefaultPosition;
2420     if (pt.x != wxDefaultCoord)
2421         pt2.x = (int) ((pt.x * charWidth) / 4);
2422     if (pt.y != wxDefaultCoord)
2423         pt2.y = (int) ((pt.y * charHeight) / 8);
2424
2425     return pt2;
2426 }
2427
2428 // ----------------------------------------------------------------------------
2429 // event handlers
2430 // ----------------------------------------------------------------------------
2431
2432 // propagate the colour change event to the subwindows
2433 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
2434 {
2435     wxWindowList::compatibility_iterator node = GetChildren().GetFirst();
2436     while ( node )
2437     {
2438         // Only propagate to non-top-level windows
2439         wxWindow *win = node->GetData();
2440         if ( !win->IsTopLevel() )
2441         {
2442             wxSysColourChangedEvent event2;
2443             event.SetEventObject(win);
2444             win->GetEventHandler()->ProcessEvent(event2);
2445         }
2446
2447         node = node->GetNext();
2448     }
2449
2450     Refresh();
2451 }
2452
2453 // the default action is to populate dialog with data when it's created,
2454 // and nudge the UI into displaying itself correctly in case
2455 // we've turned the wxUpdateUIEvents frequency down low.
2456 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
2457 {
2458     TransferDataToWindow();
2459
2460     // Update the UI at this point
2461     UpdateWindowUI(wxUPDATE_UI_RECURSE);
2462 }
2463
2464 // ----------------------------------------------------------------------------
2465 // menu-related functions
2466 // ----------------------------------------------------------------------------
2467
2468 #if wxUSE_MENUS
2469
2470 bool wxWindowBase::PopupMenu(wxMenu *menu, int x, int y)
2471 {
2472     wxCHECK_MSG( menu, false, "can't popup NULL menu" );
2473
2474     wxCurrentPopupMenu = menu;
2475     const bool rc = DoPopupMenu(menu, x, y);
2476     wxCurrentPopupMenu = NULL;
2477
2478     return rc;
2479 }
2480
2481 // this is used to pass the id of the selected item from the menu event handler
2482 // to the main function itself
2483 //
2484 // it's ok to use a global here as there can be at most one popup menu shown at
2485 // any time
2486 static int gs_popupMenuSelection = wxID_NONE;
2487
2488 void wxWindowBase::InternalOnPopupMenu(wxCommandEvent& event)
2489 {
2490     // store the id in a global variable where we'll retrieve it from later
2491     gs_popupMenuSelection = event.GetId();
2492 }
2493
2494 void wxWindowBase::InternalOnPopupMenuUpdate(wxUpdateUIEvent& WXUNUSED(event))
2495 {
2496     // nothing to do but do not skip it
2497 }
2498
2499 int
2500 wxWindowBase::DoGetPopupMenuSelectionFromUser(wxMenu& menu, int x, int y)
2501 {
2502     gs_popupMenuSelection = wxID_NONE;
2503
2504     Connect(wxEVT_COMMAND_MENU_SELECTED,
2505             wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2506             NULL,
2507             this);
2508
2509     // it is common to construct the menu passed to this function dynamically
2510     // using some fixed range of ids which could clash with the ids used
2511     // elsewhere in the program, which could result in some menu items being
2512     // unintentionally disabled or otherwise modified by update UI handlers
2513     // elsewhere in the program code and this is difficult to avoid in the
2514     // program itself, so instead we just temporarily suspend UI updating while
2515     // this menu is shown
2516     Connect(wxEVT_UPDATE_UI,
2517             wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2518             NULL,
2519             this);
2520
2521     PopupMenu(&menu, x, y);
2522
2523     Disconnect(wxEVT_UPDATE_UI,
2524                wxUpdateUIEventHandler(wxWindowBase::InternalOnPopupMenuUpdate),
2525                NULL,
2526                this);
2527     Disconnect(wxEVT_COMMAND_MENU_SELECTED,
2528                wxCommandEventHandler(wxWindowBase::InternalOnPopupMenu),
2529                NULL,
2530                this);
2531
2532     return gs_popupMenuSelection;
2533 }
2534
2535 #endif // wxUSE_MENUS
2536
2537 // methods for drawing the sizers in a visible way
2538 #ifdef __WXDEBUG__
2539
2540 static void DrawSizers(wxWindowBase *win);
2541
2542 static void DrawBorder(wxWindowBase *win, const wxRect& rect, bool fill, const wxPen* pen)
2543 {
2544     wxClientDC dc((wxWindow *)win);
2545     dc.SetPen(*pen);
2546     dc.SetBrush(fill ? wxBrush(pen->GetColour(), wxBRUSHSTYLE_CROSSDIAG_HATCH) :
2547                        *wxTRANSPARENT_BRUSH);
2548     dc.DrawRectangle(rect.Deflate(1, 1));
2549 }
2550
2551 static void DrawSizer(wxWindowBase *win, wxSizer *sizer)
2552 {
2553     const wxSizerItemList& items = sizer->GetChildren();
2554     for ( wxSizerItemList::const_iterator i = items.begin(),
2555                                         end = items.end();
2556           i != end;
2557           ++i )
2558     {
2559         wxSizerItem *item = *i;
2560         if ( item->IsSizer() )
2561         {
2562             DrawBorder(win, item->GetRect().Deflate(2), false, wxRED_PEN);
2563             DrawSizer(win, item->GetSizer());
2564         }
2565         else if ( item->IsSpacer() )
2566         {
2567             DrawBorder(win, item->GetRect().Deflate(2), true, wxBLUE_PEN);
2568         }
2569         else if ( item->IsWindow() )
2570         {
2571             DrawSizers(item->GetWindow());
2572         }
2573     }
2574 }
2575
2576 static void DrawSizers(wxWindowBase *win)
2577 {
2578     DrawBorder(win, win->GetClientSize(), false, wxGREEN_PEN);
2579
2580     wxSizer *sizer = win->GetSizer();
2581     if ( sizer )
2582     {
2583         DrawSizer(win, sizer);
2584     }
2585     else // no sizer, still recurse into the children
2586     {
2587         const wxWindowList& children = win->GetChildren();
2588         for ( wxWindowList::const_iterator i = children.begin(),
2589                                          end = children.end();
2590               i != end;
2591               ++i )
2592         {
2593             DrawSizers(*i);
2594         }
2595     }
2596 }
2597
2598 #endif // __WXDEBUG__
2599
2600 // process special middle clicks
2601 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
2602 {
2603     if ( event.ControlDown() && event.AltDown() )
2604     {
2605 #ifdef __WXDEBUG__
2606         // Ctrl-Alt-Shift-mclick makes the sizers visible in debug builds
2607         if ( event.ShiftDown() )
2608         {
2609             DrawSizers(this);
2610             return;
2611         }
2612 #endif // __WXDEBUG__
2613         ::wxInfoMessageBox((wxWindow*)this);
2614     }
2615     else
2616     {
2617         event.Skip();
2618     }
2619 }
2620
2621 // ----------------------------------------------------------------------------
2622 // accessibility
2623 // ----------------------------------------------------------------------------
2624
2625 #if wxUSE_ACCESSIBILITY
2626 void wxWindowBase::SetAccessible(wxAccessible* accessible)
2627 {
2628     if (m_accessible && (accessible != m_accessible))
2629         delete m_accessible;
2630     m_accessible = accessible;
2631     if (m_accessible)
2632         m_accessible->SetWindow((wxWindow*) this);
2633 }
2634
2635 // Returns the accessible object, creating if necessary.
2636 wxAccessible* wxWindowBase::GetOrCreateAccessible()
2637 {
2638     if (!m_accessible)
2639         m_accessible = CreateAccessible();
2640     return m_accessible;
2641 }
2642
2643 // Override to create a specific accessible object.
2644 wxAccessible* wxWindowBase::CreateAccessible()
2645 {
2646     return new wxWindowAccessible((wxWindow*) this);
2647 }
2648
2649 #endif
2650
2651 // ----------------------------------------------------------------------------
2652 // list classes implementation
2653 // ----------------------------------------------------------------------------
2654
2655 #if wxUSE_STL
2656
2657 #include "wx/listimpl.cpp"
2658 WX_DEFINE_LIST(wxWindowList)
2659
2660 #else // !wxUSE_STL
2661
2662 void wxWindowListNode::DeleteData()
2663 {
2664     delete (wxWindow *)GetData();
2665 }
2666
2667 #endif // wxUSE_STL/!wxUSE_STL
2668
2669 // ----------------------------------------------------------------------------
2670 // borders
2671 // ----------------------------------------------------------------------------
2672
2673 wxBorder wxWindowBase::GetBorder(long flags) const
2674 {
2675     wxBorder border = (wxBorder)(flags & wxBORDER_MASK);
2676     if ( border == wxBORDER_DEFAULT )
2677     {
2678         border = GetDefaultBorder();
2679     }
2680     else if ( border == wxBORDER_THEME )
2681     {
2682         border = GetDefaultBorderForControl();
2683     }
2684
2685     return border;
2686 }
2687
2688 wxBorder wxWindowBase::GetDefaultBorder() const
2689 {
2690     return wxBORDER_NONE;
2691 }
2692
2693 // ----------------------------------------------------------------------------
2694 // hit testing
2695 // ----------------------------------------------------------------------------
2696
2697 wxHitTest wxWindowBase::DoHitTest(wxCoord x, wxCoord y) const
2698 {
2699     // here we just check if the point is inside the window or not
2700
2701     // check the top and left border first
2702     bool outside = x < 0 || y < 0;
2703     if ( !outside )
2704     {
2705         // check the right and bottom borders too
2706         wxSize size = GetSize();
2707         outside = x >= size.x || y >= size.y;
2708     }
2709
2710     return outside ? wxHT_WINDOW_OUTSIDE : wxHT_WINDOW_INSIDE;
2711 }
2712
2713 // ----------------------------------------------------------------------------
2714 // mouse capture
2715 // ----------------------------------------------------------------------------
2716
2717 struct WXDLLEXPORT wxWindowNext
2718 {
2719     wxWindow *win;
2720     wxWindowNext *next;
2721 } *wxWindowBase::ms_winCaptureNext = NULL;
2722 wxWindow *wxWindowBase::ms_winCaptureCurrent = NULL;
2723 bool wxWindowBase::ms_winCaptureChanging = false;
2724
2725 void wxWindowBase::CaptureMouse()
2726 {
2727     wxLogTrace(_T("mousecapture"), _T("CaptureMouse(%p)"), static_cast<void*>(this));
2728
2729     wxASSERT_MSG( !ms_winCaptureChanging, _T("recursive CaptureMouse call?") );
2730
2731     ms_winCaptureChanging = true;
2732
2733     wxWindow *winOld = GetCapture();
2734     if ( winOld )
2735     {
2736         ((wxWindowBase*) winOld)->DoReleaseMouse();
2737
2738         // save it on stack
2739         wxWindowNext *item = new wxWindowNext;
2740         item->win = winOld;
2741         item->next = ms_winCaptureNext;
2742         ms_winCaptureNext = item;
2743     }
2744     //else: no mouse capture to save
2745
2746     DoCaptureMouse();
2747     ms_winCaptureCurrent = (wxWindow*)this;
2748
2749     ms_winCaptureChanging = false;
2750 }
2751
2752 void wxWindowBase::ReleaseMouse()
2753 {
2754     wxLogTrace(_T("mousecapture"), _T("ReleaseMouse(%p)"), static_cast<void*>(this));
2755
2756     wxASSERT_MSG( !ms_winCaptureChanging, _T("recursive ReleaseMouse call?") );
2757
2758     wxASSERT_MSG( GetCapture() == this,
2759                   "attempt to release mouse, but this window hasn't captured it" );
2760     wxASSERT_MSG( ms_winCaptureCurrent == this,
2761                   "attempt to release mouse, but this window hasn't captured it" );
2762
2763     ms_winCaptureChanging = true;
2764
2765     DoReleaseMouse();
2766     ms_winCaptureCurrent = NULL;
2767
2768     if ( ms_winCaptureNext )
2769     {
2770         ((wxWindowBase*)ms_winCaptureNext->win)->DoCaptureMouse();
2771         ms_winCaptureCurrent = ms_winCaptureNext->win;
2772
2773         wxWindowNext *item = ms_winCaptureNext;
2774         ms_winCaptureNext = item->next;
2775         delete item;
2776     }
2777     //else: stack is empty, no previous capture
2778
2779     ms_winCaptureChanging = false;
2780
2781     wxLogTrace(_T("mousecapture"),
2782         (const wxChar *) _T("After ReleaseMouse() mouse is captured by %p"),
2783         static_cast<void*>(GetCapture()));
2784 }
2785
2786 static void DoNotifyWindowAboutCaptureLost(wxWindow *win)
2787 {
2788     wxMouseCaptureLostEvent event(win->GetId());
2789     event.SetEventObject(win);
2790     if ( !win->GetEventHandler()->ProcessEvent(event) )
2791     {
2792         // windows must handle this event, otherwise the app wouldn't behave
2793         // correctly if it loses capture unexpectedly; see the discussion here:
2794         // http://sourceforge.net/tracker/index.php?func=detail&aid=1153662&group_id=9863&atid=109863
2795         // http://article.gmane.org/gmane.comp.lib.wxwidgets.devel/82376
2796         wxFAIL_MSG( _T("window that captured the mouse didn't process wxEVT_MOUSE_CAPTURE_LOST") );
2797     }
2798 }
2799
2800 /* static */
2801 void wxWindowBase::NotifyCaptureLost()
2802 {
2803     // don't do anything if capture lost was expected, i.e. resulted from
2804     // a wx call to ReleaseMouse or CaptureMouse:
2805     if ( ms_winCaptureChanging )
2806         return;
2807
2808     // if the capture was lost unexpectedly, notify every window that has
2809     // capture (on stack or current) about it and clear the stack:
2810
2811     if ( ms_winCaptureCurrent )
2812     {
2813         DoNotifyWindowAboutCaptureLost(ms_winCaptureCurrent);
2814         ms_winCaptureCurrent = NULL;
2815     }
2816
2817     while ( ms_winCaptureNext )
2818     {
2819         wxWindowNext *item = ms_winCaptureNext;
2820         ms_winCaptureNext = item->next;
2821
2822         DoNotifyWindowAboutCaptureLost(item->win);
2823
2824         delete item;
2825     }
2826 }
2827
2828 #if wxUSE_HOTKEY
2829
2830 bool
2831 wxWindowBase::RegisterHotKey(int WXUNUSED(hotkeyId),
2832                              int WXUNUSED(modifiers),
2833                              int WXUNUSED(keycode))
2834 {
2835     // not implemented
2836     return false;
2837 }
2838
2839 bool wxWindowBase::UnregisterHotKey(int WXUNUSED(hotkeyId))
2840 {
2841     // not implemented
2842     return false;
2843 }
2844
2845 #endif // wxUSE_HOTKEY
2846
2847 // ----------------------------------------------------------------------------
2848 // event processing
2849 // ----------------------------------------------------------------------------
2850
2851 bool wxWindowBase::TryValidator(wxEvent& wxVALIDATOR_PARAM(event))
2852 {
2853 #if wxUSE_VALIDATORS
2854     // Can only use the validator of the window which
2855     // is receiving the event
2856     if ( event.GetEventObject() == this )
2857     {
2858         wxValidator * const validator = GetValidator();
2859         if ( validator && validator->ProcessEventHere(event) )
2860         {
2861             return true;
2862         }
2863     }
2864 #endif // wxUSE_VALIDATORS
2865
2866     return false;
2867 }
2868
2869 bool wxWindowBase::TryParent(wxEvent& event)
2870 {
2871     // carry on up the parent-child hierarchy if the propagation count hasn't
2872     // reached zero yet
2873     if ( event.ShouldPropagate() )
2874     {
2875         // honour the requests to stop propagation at this window: this is
2876         // used by the dialogs, for example, to prevent processing the events
2877         // from the dialog controls in the parent frame which rarely, if ever,
2878         // makes sense
2879         if ( !(GetExtraStyle() & wxWS_EX_BLOCK_EVENTS) )
2880         {
2881             wxWindow *parent = GetParent();
2882             if ( parent && !parent->IsBeingDeleted() )
2883             {
2884                 wxPropagateOnce propagateOnce(event);
2885
2886                 return parent->GetEventHandler()->ProcessEvent(event);
2887             }
2888         }
2889     }
2890
2891     return wxEvtHandler::TryParent(event);
2892 }
2893
2894 // ----------------------------------------------------------------------------
2895 // window relationships
2896 // ----------------------------------------------------------------------------
2897
2898 wxWindow *wxWindowBase::DoGetSibling(WindowOrder order) const
2899 {
2900     wxCHECK_MSG( GetParent(), NULL,
2901                     _T("GetPrev/NextSibling() don't work for TLWs!") );
2902
2903     wxWindowList& siblings = GetParent()->GetChildren();
2904     wxWindowList::compatibility_iterator i = siblings.Find((wxWindow *)this);
2905     wxCHECK_MSG( i, NULL, _T("window not a child of its parent?") );
2906
2907     if ( order == OrderBefore )
2908         i = i->GetPrevious();
2909     else // OrderAfter
2910         i = i->GetNext();
2911
2912     return i ? i->GetData() : NULL;
2913 }
2914
2915 // ----------------------------------------------------------------------------
2916 // keyboard navigation
2917 // ----------------------------------------------------------------------------
2918
2919 // Navigates in the specified direction inside this window
2920 bool wxWindowBase::DoNavigateIn(int flags)
2921 {
2922 #ifdef wxHAS_NATIVE_TAB_TRAVERSAL
2923     // native code doesn't process our wxNavigationKeyEvents anyhow
2924     wxUnusedVar(flags);
2925     return false;
2926 #else // !wxHAS_NATIVE_TAB_TRAVERSAL
2927     wxNavigationKeyEvent eventNav;
2928     wxWindow *focused = FindFocus();
2929     eventNav.SetCurrentFocus(focused);
2930     eventNav.SetEventObject(focused);
2931     eventNav.SetFlags(flags);
2932     return GetEventHandler()->ProcessEvent(eventNav);
2933 #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
2934 }
2935
2936 bool wxWindowBase::HandleAsNavigationKey(const wxKeyEvent& event)
2937 {
2938     if ( event.GetKeyCode() != WXK_TAB )
2939         return false;
2940
2941     int flags = wxNavigationKeyEvent::FromTab;
2942
2943     if ( event.ShiftDown() )
2944         flags |= wxNavigationKeyEvent::IsBackward;
2945     else
2946         flags |= wxNavigationKeyEvent::IsForward;
2947
2948     if ( event.ControlDown() )
2949         flags |= wxNavigationKeyEvent::WinChange;
2950
2951     Navigate(flags);
2952     return true;
2953 }
2954
2955 void wxWindowBase::DoMoveInTabOrder(wxWindow *win, WindowOrder move)
2956 {
2957     // check that we're not a top level window
2958     wxCHECK_RET( GetParent(),
2959                     _T("MoveBefore/AfterInTabOrder() don't work for TLWs!") );
2960
2961     // detect the special case when we have nothing to do anyhow and when the
2962     // code below wouldn't work
2963     if ( win == this )
2964         return;
2965
2966     // find the target window in the siblings list
2967     wxWindowList& siblings = GetParent()->GetChildren();
2968     wxWindowList::compatibility_iterator i = siblings.Find(win);
2969     wxCHECK_RET( i, _T("MoveBefore/AfterInTabOrder(): win is not a sibling") );
2970
2971     // unfortunately, when wxUSE_STL == 1 DetachNode() is not implemented so we
2972     // can't just move the node around
2973     wxWindow *self = (wxWindow *)this;
2974     siblings.DeleteObject(self);
2975     if ( move == OrderAfter )
2976     {
2977         i = i->GetNext();
2978     }
2979
2980     if ( i )
2981     {
2982         siblings.Insert(i, self);
2983     }
2984     else // OrderAfter and win was the last sibling
2985     {
2986         siblings.Append(self);
2987     }
2988 }
2989
2990 // ----------------------------------------------------------------------------
2991 // focus handling
2992 // ----------------------------------------------------------------------------
2993
2994 /*static*/ wxWindow* wxWindowBase::FindFocus()
2995 {
2996     wxWindowBase *win = DoFindFocus();
2997     return win ? win->GetMainWindowOfCompositeControl() : NULL;
2998 }
2999
3000 bool wxWindowBase::HasFocus() const
3001 {
3002     wxWindowBase *win = DoFindFocus();
3003     return win == this ||
3004            win == wxConstCast(this, wxWindowBase)->GetMainWindowOfCompositeControl();
3005 }
3006
3007 // ----------------------------------------------------------------------------
3008 // drag and drop
3009 // ----------------------------------------------------------------------------
3010
3011 #if wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3012
3013 namespace
3014 {
3015
3016 class DragAcceptFilesTarget : public wxFileDropTarget
3017 {
3018 public:
3019     DragAcceptFilesTarget(wxWindowBase *win) : m_win(win) {}
3020
3021     virtual bool OnDropFiles(wxCoord x, wxCoord y,
3022                              const wxArrayString& filenames)
3023     {
3024         wxDropFilesEvent event(wxEVT_DROP_FILES,
3025                                filenames.size(),
3026                                wxCArrayString(filenames).Release());
3027         event.SetEventObject(m_win);
3028         event.m_pos.x = x;
3029         event.m_pos.y = y;
3030
3031         return m_win->HandleWindowEvent(event);
3032     }
3033
3034 private:
3035     wxWindowBase * const m_win;
3036
3037     DECLARE_NO_COPY_CLASS(DragAcceptFilesTarget)
3038 };
3039
3040
3041 } // anonymous namespace
3042
3043 // Generic version of DragAcceptFiles(). It works by installing a simple
3044 // wxFileDropTarget-to-EVT_DROP_FILES adaptor and therefore cannot be used
3045 // together with explicit SetDropTarget() calls.
3046 void wxWindowBase::DragAcceptFiles(bool accept)
3047 {
3048     if ( accept )
3049     {
3050         wxASSERT_MSG( !GetDropTarget(),
3051                       "cannot use DragAcceptFiles() and SetDropTarget() together" );
3052         SetDropTarget(new DragAcceptFilesTarget(this));
3053     }
3054     else
3055     {
3056         SetDropTarget(NULL);
3057     }
3058 }
3059
3060 #endif // wxUSE_DRAG_AND_DROP && !defined(__WXMSW__)
3061
3062 // ----------------------------------------------------------------------------
3063 // global functions
3064 // ----------------------------------------------------------------------------
3065
3066 wxWindow* wxGetTopLevelParent(wxWindow *win)
3067 {
3068     while ( win && !win->IsTopLevel() )
3069          win = win->GetParent();
3070
3071     return win;
3072 }
3073
3074 #if wxUSE_ACCESSIBILITY
3075 // ----------------------------------------------------------------------------
3076 // accessible object for windows
3077 // ----------------------------------------------------------------------------
3078
3079 // Can return either a child object, or an integer
3080 // representing the child element, starting from 1.
3081 wxAccStatus wxWindowAccessible::HitTest(const wxPoint& WXUNUSED(pt), int* WXUNUSED(childId), wxAccessible** WXUNUSED(childObject))
3082 {
3083     wxASSERT( GetWindow() != NULL );
3084     if (!GetWindow())
3085         return wxACC_FAIL;
3086
3087     return wxACC_NOT_IMPLEMENTED;
3088 }
3089
3090 // Returns the rectangle for this object (id = 0) or a child element (id > 0).
3091 wxAccStatus wxWindowAccessible::GetLocation(wxRect& rect, int elementId)
3092 {
3093     wxASSERT( GetWindow() != NULL );
3094     if (!GetWindow())
3095         return wxACC_FAIL;
3096
3097     wxWindow* win = NULL;
3098     if (elementId == 0)
3099     {
3100         win = GetWindow();
3101     }
3102     else
3103     {
3104         if (elementId <= (int) GetWindow()->GetChildren().GetCount())
3105         {
3106             win = GetWindow()->GetChildren().Item(elementId-1)->GetData();
3107         }
3108         else
3109             return wxACC_FAIL;
3110     }
3111     if (win)
3112     {
3113         rect = win->GetRect();
3114         if (win->GetParent() && !win->IsKindOf(CLASSINFO(wxTopLevelWindow)))
3115             rect.SetPosition(win->GetParent()->ClientToScreen(rect.GetPosition()));
3116         return wxACC_OK;
3117     }
3118
3119     return wxACC_NOT_IMPLEMENTED;
3120 }
3121
3122 // Navigates from fromId to toId/toObject.
3123 wxAccStatus wxWindowAccessible::Navigate(wxNavDir navDir, int fromId,
3124                              int* WXUNUSED(toId), wxAccessible** toObject)
3125 {
3126     wxASSERT( GetWindow() != NULL );
3127     if (!GetWindow())
3128         return wxACC_FAIL;
3129
3130     switch (navDir)
3131     {
3132     case wxNAVDIR_FIRSTCHILD:
3133         {
3134             if (GetWindow()->GetChildren().GetCount() == 0)
3135                 return wxACC_FALSE;
3136             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetFirst()->GetData();
3137             *toObject = childWindow->GetOrCreateAccessible();
3138
3139             return wxACC_OK;
3140         }
3141     case wxNAVDIR_LASTCHILD:
3142         {
3143             if (GetWindow()->GetChildren().GetCount() == 0)
3144                 return wxACC_FALSE;
3145             wxWindow* childWindow = (wxWindow*) GetWindow()->GetChildren().GetLast()->GetData();
3146             *toObject = childWindow->GetOrCreateAccessible();
3147
3148             return wxACC_OK;
3149         }
3150     case wxNAVDIR_RIGHT:
3151     case wxNAVDIR_DOWN:
3152     case wxNAVDIR_NEXT:
3153         {
3154             wxWindowList::compatibility_iterator node =
3155                 wxWindowList::compatibility_iterator();
3156             if (fromId == 0)
3157             {
3158                 // Can't navigate to sibling of this window
3159                 // if we're a top-level window.
3160                 if (!GetWindow()->GetParent())
3161                     return wxACC_NOT_IMPLEMENTED;
3162
3163                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3164             }
3165             else
3166             {
3167                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3168                     node = GetWindow()->GetChildren().Item(fromId-1);
3169             }
3170
3171             if (node && node->GetNext())
3172             {
3173                 wxWindow* nextWindow = node->GetNext()->GetData();
3174                 *toObject = nextWindow->GetOrCreateAccessible();
3175                 return wxACC_OK;
3176             }
3177             else
3178                 return wxACC_FALSE;
3179         }
3180     case wxNAVDIR_LEFT:
3181     case wxNAVDIR_UP:
3182     case wxNAVDIR_PREVIOUS:
3183         {
3184             wxWindowList::compatibility_iterator node =
3185                 wxWindowList::compatibility_iterator();
3186             if (fromId == 0)
3187             {
3188                 // Can't navigate to sibling of this window
3189                 // if we're a top-level window.
3190                 if (!GetWindow()->GetParent())
3191                     return wxACC_NOT_IMPLEMENTED;
3192
3193                 node = GetWindow()->GetParent()->GetChildren().Find(GetWindow());
3194             }
3195             else
3196             {
3197                 if (fromId <= (int) GetWindow()->GetChildren().GetCount())
3198                     node = GetWindow()->GetChildren().Item(fromId-1);
3199             }
3200
3201             if (node && node->GetPrevious())
3202             {
3203                 wxWindow* previousWindow = node->GetPrevious()->GetData();
3204                 *toObject = previousWindow->GetOrCreateAccessible();
3205                 return wxACC_OK;
3206             }
3207             else
3208                 return wxACC_FALSE;
3209         }
3210     }
3211
3212     return wxACC_NOT_IMPLEMENTED;
3213 }
3214
3215 // Gets the name of the specified object.
3216 wxAccStatus wxWindowAccessible::GetName(int childId, wxString* name)
3217 {
3218     wxASSERT( GetWindow() != NULL );
3219     if (!GetWindow())
3220         return wxACC_FAIL;
3221
3222     wxString title;
3223
3224     // If a child, leave wxWidgets to call the function on the actual
3225     // child object.
3226     if (childId > 0)
3227         return wxACC_NOT_IMPLEMENTED;
3228
3229     // This will eventually be replaced by specialised
3230     // accessible classes, one for each kind of wxWidgets
3231     // control or window.
3232 #if wxUSE_BUTTON
3233     if (GetWindow()->IsKindOf(CLASSINFO(wxButton)))
3234         title = ((wxButton*) GetWindow())->GetLabel();
3235     else
3236 #endif
3237         title = GetWindow()->GetName();
3238
3239     if (!title.empty())
3240     {
3241         *name = title;
3242         return wxACC_OK;
3243     }
3244     else
3245         return wxACC_NOT_IMPLEMENTED;
3246 }
3247
3248 // Gets the number of children.
3249 wxAccStatus wxWindowAccessible::GetChildCount(int* childId)
3250 {
3251     wxASSERT( GetWindow() != NULL );
3252     if (!GetWindow())
3253         return wxACC_FAIL;
3254
3255     *childId = (int) GetWindow()->GetChildren().GetCount();
3256     return wxACC_OK;
3257 }
3258
3259 // Gets the specified child (starting from 1).
3260 // If *child is NULL and return value is wxACC_OK,
3261 // this means that the child is a simple element and
3262 // not an accessible object.
3263 wxAccStatus wxWindowAccessible::GetChild(int childId, wxAccessible** child)
3264 {
3265     wxASSERT( GetWindow() != NULL );
3266     if (!GetWindow())
3267         return wxACC_FAIL;
3268
3269     if (childId == 0)
3270     {
3271         *child = this;
3272         return wxACC_OK;
3273     }
3274
3275     if (childId > (int) GetWindow()->GetChildren().GetCount())
3276         return wxACC_FAIL;
3277
3278     wxWindow* childWindow = GetWindow()->GetChildren().Item(childId-1)->GetData();
3279     *child = childWindow->GetOrCreateAccessible();
3280     if (*child)
3281         return wxACC_OK;
3282     else
3283         return wxACC_FAIL;
3284 }
3285
3286 // Gets the parent, or NULL.
3287 wxAccStatus wxWindowAccessible::GetParent(wxAccessible** parent)
3288 {
3289     wxASSERT( GetWindow() != NULL );
3290     if (!GetWindow())
3291         return wxACC_FAIL;
3292
3293     wxWindow* parentWindow = GetWindow()->GetParent();
3294     if (!parentWindow)
3295     {
3296         *parent = NULL;
3297         return wxACC_OK;
3298     }
3299     else
3300     {
3301         *parent = parentWindow->GetOrCreateAccessible();
3302         if (*parent)
3303             return wxACC_OK;
3304         else
3305             return wxACC_FAIL;
3306     }
3307 }
3308
3309 // Performs the default action. childId is 0 (the action for this object)
3310 // or > 0 (the action for a child).
3311 // Return wxACC_NOT_SUPPORTED if there is no default action for this
3312 // window (e.g. an edit control).
3313 wxAccStatus wxWindowAccessible::DoDefaultAction(int WXUNUSED(childId))
3314 {
3315     wxASSERT( GetWindow() != NULL );
3316     if (!GetWindow())
3317         return wxACC_FAIL;
3318
3319     return wxACC_NOT_IMPLEMENTED;
3320 }
3321
3322 // Gets the default action for this object (0) or > 0 (the action for a child).
3323 // Return wxACC_OK even if there is no action. actionName is the action, or the empty
3324 // string if there is no action.
3325 // The retrieved string describes the action that is performed on an object,
3326 // not what the object does as a result. For example, a toolbar button that prints
3327 // a document has a default action of "Press" rather than "Prints the current document."
3328 wxAccStatus wxWindowAccessible::GetDefaultAction(int WXUNUSED(childId), wxString* WXUNUSED(actionName))
3329 {
3330     wxASSERT( GetWindow() != NULL );
3331     if (!GetWindow())
3332         return wxACC_FAIL;
3333
3334     return wxACC_NOT_IMPLEMENTED;
3335 }
3336
3337 // Returns the description for this object or a child.
3338 wxAccStatus wxWindowAccessible::GetDescription(int WXUNUSED(childId), wxString* description)
3339 {
3340     wxASSERT( GetWindow() != NULL );
3341     if (!GetWindow())
3342         return wxACC_FAIL;
3343
3344     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3345     if (!ht.empty())
3346     {
3347         *description = ht;
3348         return wxACC_OK;
3349     }
3350     return wxACC_NOT_IMPLEMENTED;
3351 }
3352
3353 // Returns help text for this object or a child, similar to tooltip text.
3354 wxAccStatus wxWindowAccessible::GetHelpText(int WXUNUSED(childId), wxString* helpText)
3355 {
3356     wxASSERT( GetWindow() != NULL );
3357     if (!GetWindow())
3358         return wxACC_FAIL;
3359
3360     wxString ht(GetWindow()->GetHelpTextAtPoint(wxDefaultPosition, wxHelpEvent::Origin_Keyboard));
3361     if (!ht.empty())
3362     {
3363         *helpText = ht;
3364         return wxACC_OK;
3365     }
3366     return wxACC_NOT_IMPLEMENTED;
3367 }
3368
3369 // Returns the keyboard shortcut for this object or child.
3370 // Return e.g. ALT+K
3371 wxAccStatus wxWindowAccessible::GetKeyboardShortcut(int WXUNUSED(childId), wxString* WXUNUSED(shortcut))
3372 {
3373     wxASSERT( GetWindow() != NULL );
3374     if (!GetWindow())
3375         return wxACC_FAIL;
3376
3377     return wxACC_NOT_IMPLEMENTED;
3378 }
3379
3380 // Returns a role constant.
3381 wxAccStatus wxWindowAccessible::GetRole(int childId, wxAccRole* role)
3382 {
3383     wxASSERT( GetWindow() != NULL );
3384     if (!GetWindow())
3385         return wxACC_FAIL;
3386
3387     // If a child, leave wxWidgets to call the function on the actual
3388     // child object.
3389     if (childId > 0)
3390         return wxACC_NOT_IMPLEMENTED;
3391
3392     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3393         return wxACC_NOT_IMPLEMENTED;
3394 #if wxUSE_STATUSBAR
3395     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3396         return wxACC_NOT_IMPLEMENTED;
3397 #endif
3398 #if wxUSE_TOOLBAR
3399     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3400         return wxACC_NOT_IMPLEMENTED;
3401 #endif
3402
3403     //*role = wxROLE_SYSTEM_CLIENT;
3404     *role = wxROLE_SYSTEM_CLIENT;
3405     return wxACC_OK;
3406
3407     #if 0
3408     return wxACC_NOT_IMPLEMENTED;
3409     #endif
3410 }
3411
3412 // Returns a state constant.
3413 wxAccStatus wxWindowAccessible::GetState(int childId, long* state)
3414 {
3415     wxASSERT( GetWindow() != NULL );
3416     if (!GetWindow())
3417         return wxACC_FAIL;
3418
3419     // If a child, leave wxWidgets to call the function on the actual
3420     // child object.
3421     if (childId > 0)
3422         return wxACC_NOT_IMPLEMENTED;
3423
3424     if (GetWindow()->IsKindOf(CLASSINFO(wxControl)))
3425         return wxACC_NOT_IMPLEMENTED;
3426
3427 #if wxUSE_STATUSBAR
3428     if (GetWindow()->IsKindOf(CLASSINFO(wxStatusBar)))
3429         return wxACC_NOT_IMPLEMENTED;
3430 #endif
3431 #if wxUSE_TOOLBAR
3432     if (GetWindow()->IsKindOf(CLASSINFO(wxToolBar)))
3433         return wxACC_NOT_IMPLEMENTED;
3434 #endif
3435
3436     *state = 0;
3437     return wxACC_OK;
3438
3439     #if 0
3440     return wxACC_NOT_IMPLEMENTED;
3441     #endif
3442 }
3443
3444 // Returns a localized string representing the value for the object
3445 // or child.
3446 wxAccStatus wxWindowAccessible::GetValue(int WXUNUSED(childId), wxString* WXUNUSED(strValue))
3447 {
3448     wxASSERT( GetWindow() != NULL );
3449     if (!GetWindow())
3450         return wxACC_FAIL;
3451
3452     return wxACC_NOT_IMPLEMENTED;
3453 }
3454
3455 // Selects the object or child.
3456 wxAccStatus wxWindowAccessible::Select(int WXUNUSED(childId), wxAccSelectionFlags WXUNUSED(selectFlags))
3457 {
3458     wxASSERT( GetWindow() != NULL );
3459     if (!GetWindow())
3460         return wxACC_FAIL;
3461
3462     return wxACC_NOT_IMPLEMENTED;
3463 }
3464
3465 // Gets the window with the keyboard focus.
3466 // If childId is 0 and child is NULL, no object in
3467 // this subhierarchy has the focus.
3468 // If this object has the focus, child should be 'this'.
3469 wxAccStatus wxWindowAccessible::GetFocus(int* WXUNUSED(childId), wxAccessible** WXUNUSED(child))
3470 {
3471     wxASSERT( GetWindow() != NULL );
3472     if (!GetWindow())
3473         return wxACC_FAIL;
3474
3475     return wxACC_NOT_IMPLEMENTED;
3476 }
3477
3478 #if wxUSE_VARIANT
3479 // Gets a variant representing the selected children
3480 // of this object.
3481 // Acceptable values:
3482 // - a null variant (IsNull() returns true)
3483 // - a list variant (GetType() == wxT("list")
3484 // - an integer representing the selected child element,
3485 //   or 0 if this object is selected (GetType() == wxT("long")
3486 // - a "void*" pointer to a wxAccessible child object
3487 wxAccStatus wxWindowAccessible::GetSelections(wxVariant* WXUNUSED(selections))
3488 {
3489     wxASSERT( GetWindow() != NULL );
3490     if (!GetWindow())
3491         return wxACC_FAIL;
3492
3493     return wxACC_NOT_IMPLEMENTED;
3494 }
3495 #endif // wxUSE_VARIANT
3496
3497 #endif // wxUSE_ACCESSIBILITY
3498
3499 // ----------------------------------------------------------------------------
3500 // RTL support
3501 // ----------------------------------------------------------------------------
3502
3503 wxCoord
3504 wxWindowBase::AdjustForLayoutDirection(wxCoord x,
3505                                        wxCoord width,
3506                                        wxCoord widthTotal) const
3507 {
3508     if ( GetLayoutDirection() == wxLayout_RightToLeft )
3509     {
3510         x = widthTotal - x - width;
3511     }
3512
3513     return x;
3514 }
3515
3516