src/common/wincmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        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) wxWindows team
   9 // Licence:     wxWindows license
  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/defs.h"
  33     #include "wx/window.h"
  34     #include "wx/checkbox.h"
  35     #include "wx/radiobut.h"
  36     #include "wx/settings.h"
  37     #include "wx/dialog.h"
  38 #endif //WX_PRECOMP
  39
  40 #if wxUSE_CONSTRAINTS
  41     #include "wx/layout.h"
  42 #endif // wxUSE_CONSTRAINTS
  43
  44 #if wxUSE_DRAG_AND_DROP
  45     #include "wx/dnd.h"
  46 #endif // wxUSE_DRAG_AND_DROP
  47
  48 #if wxUSE_TOOLTIPS
  49     #include "wx/tooltip.h"
  50 #endif // wxUSE_TOOLTIPS
  51
  52 // ----------------------------------------------------------------------------
  53 // static data
  54 // ----------------------------------------------------------------------------
  55
  56 int wxWindowBase::ms_lastControlId = 0;
  57
  58 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  59
  60 // ----------------------------------------------------------------------------
  61 // event table
  62 // ----------------------------------------------------------------------------
  63
  64 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  65     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  66     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  67 END_EVENT_TABLE()
  68
  69 // ============================================================================
  70 // implementation of the common functionality of the wxWindow class
  71 // ============================================================================
  72
  73 // ----------------------------------------------------------------------------
  74 // initialization
  75 // ----------------------------------------------------------------------------
  76
  77 // the default initialization
  78 void wxWindowBase::InitBase()
  79 {
  80     // no window yet, no parent nor children
  81 //    m_widget = (WXWidget)0;
  82     m_parent = (wxWindow *)NULL;
  83     m_windowId = -1;
  84     m_children.DeleteContents( FALSE ); // don't auto delete node data
  85
  86     // no constraints on the minimal window size
  87     m_minWidth =
  88     m_minHeight =
  89     m_maxWidth =
  90     m_maxHeight = -1;
  91
  92     // window is created enabled but it's not visible yet
  93     m_isShown = FALSE;
  94     m_isEnabled = TRUE;
  95
  96     // no client data
  97     m_clientObject = (wxClientData *)NULL;
  98     m_clientData = NULL;
  99
 100     // the default event handler is just this window
 101     m_eventHandler = this;
 102
 103     // no validator
 104     m_windowValidator = (wxValidator *) NULL;
 105
 106     // use the system default colours
 107     wxSystemSettings settings;
 108
 109     m_backgroundColour = settings.GetSystemColour(wxSYS_COLOUR_BTNFACE);
 110     m_foregroundColour = *wxBLACK;  // TODO take this from sys settings too?
 111     m_font = *wxSWISS_FONT;         //      and this?
 112
 113     // no style bits
 114     m_windowStyle = 0;
 115
 116     // an optimization for the event processing: checking this flag is much
 117     // faster than using IsKindOf(CLASSINFO(wxWindow))
 118     m_isWindow = TRUE;
 119
 120 #if wxUSE_CONSTRAINTS
 121     // no constraints whatsoever
 122     m_constraints = (wxLayoutConstraints *) NULL;
 123     m_constraintsInvolvedIn = (wxWindowList *) NULL;
 124     m_windowSizer = (wxSizer *) NULL;
 125     m_sizerParent = (wxWindowBase *) NULL;
 126     m_autoLayout = FALSE;
 127 #endif // wxUSE_CONSTRAINTS
 128
 129 #if wxUSE_DRAG_AND_DROP
 130     m_dropTarget = (wxDropTarget *)NULL;
 131 #endif // wxUSE_DRAG_AND_DROP
 132
 133 #if wxUSE_TOOLTIPS
 134     m_tooltip = (wxToolTip *)NULL;
 135 #endif // wxUSE_TOOLTIPS
 136 }
 137
 138 // common part of window creation process
 139 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 140                               wxWindowID id,
 141                               const wxPoint& pos,
 142                               const wxSize& size,
 143                               long style,
 144                               const wxString& name)
 145 {
 146     // m_isWindow is set to TRUE in wxWindowBase::Init() as well as many other
 147     // member variables - check that it has been called (will catch the case
 148     // when a new ctor is added which doesn't call InitWindow)
 149     wxASSERT_MSG( m_isWindow, _T("Init() must have been called before!") );
 150
 151     // generate a new id if the user doesn't care about it
 152     m_windowId = id == -1 ? NewControlId() : id;
 153
 154     SetName(name);
 155     SetWindowStyleFlag(style);
 156     SetParent(parent);
 157
 158     return TRUE;
 159 }
 160
 161 // ----------------------------------------------------------------------------
 162 // destruction
 163 // ----------------------------------------------------------------------------
 164
 165 // common clean up
 166 wxWindowBase::~wxWindowBase()
 167 {
 168     // FIXME if these 2 cases result from programming errors in the user code
 169     //       we should probably assert here instead of silently fixing them
 170
 171     // Just in case the window has been Closed, but we're then deleting
 172     // immediately: don't leave dangling pointers.
 173     wxPendingDelete.DeleteObject(this);
 174
 175     // Just in case we've loaded a top-level window via LoadNativeDialog but
 176     // we weren't a dialog class
 177     wxTopLevelWindows.DeleteObject(this);
 178
 179     DestroyChildren();
 180
 181     if ( m_windowValidator )
 182         delete m_windowValidator;
 183
 184     if ( m_clientObject )
 185         delete m_clientObject;
 186
 187 #if wxUSE_CONSTRAINTS
 188     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 189     // at deleted windows as they delete themselves.
 190     DeleteRelatedConstraints();
 191
 192     if ( m_constraints )
 193     {
 194         // This removes any dangling pointers to this window in other windows'
 195         // constraintsInvolvedIn lists.
 196         UnsetConstraints(m_constraints);
 197         delete m_constraints;
 198         m_constraints = NULL;
 199     }
 200
 201     if ( m_windowSizer )
 202         delete m_windowSizer;
 203
 204     // If this is a child of a sizer, remove self from parent
 205     if ( m_sizerParent )
 206         m_sizerParent->RemoveChild(this);
 207 #endif // wxUSE_CONSTRAINTS
 208
 209 #if wxUSE_DRAG_AND_DROP
 210     if ( m_dropTarget )
 211         delete m_dropTarget;
 212 #endif // wxUSE_DRAG_AND_DROP
 213
 214 #if wxUSE_TOOLTIPS
 215     if ( m_tooltip )
 216         delete m_tooltip;
 217 #endif // wxUSE_TOOLTIPS
 218 }
 219
 220 bool wxWindowBase::Destroy()
 221 {
 222     delete this;
 223
 224     return TRUE;
 225 }
 226
 227 bool wxWindowBase::Close(bool force)
 228 {
 229     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 230     event.SetEventObject(this);
 231 #if WXWIN_COMPATIBILITY
 232     event.SetForce(force);
 233 #endif // WXWIN_COMPATIBILITY
 234     event.SetCanVeto(!force);
 235
 236     // return FALSE if window wasn't closed because the application vetoed the
 237     // close event
 238     return GetEventHandler()->ProcessEvent(event) && !event.GetVeto();
 239 }
 240
 241 bool wxWindowBase::DestroyChildren()
 242 {
 243     wxWindowList::Node *node;
 244     for ( node = GetChildren().GetFirst(); node; node = node->GetNext() )
 245     {
 246         wxWindow *child = node->GetData();
 247         if ( child )
 248         {
 249             delete child;
 250         }
 251     }
 252
 253     return TRUE;
 254 }
 255
 256 // ----------------------------------------------------------------------------
 257 // centre/fit the window
 258 // ----------------------------------------------------------------------------
 259
 260 // centre the window with respect to its parent in either (or both) directions
 261 void wxWindowBase::Centre(int direction)
 262 {
 263     int widthParent, heightParent;
 264
 265     wxWindow *parent = GetParent();
 266     if ( parent )
 267     {
 268         parent->GetClientSize(&widthParent, &heightParent);
 269     }
 270     else
 271     {
 272         // centre with respect to the whole screen
 273         wxDisplaySize(&widthParent, &heightParent);
 274     }
 275
 276     int width, height;
 277     GetSize(&width, &height);
 278
 279     int new_x = -1,
 280         new_y = -1;
 281
 282     if ( direction & wxHORIZONTAL )
 283         new_x = (widthParent - width)/2;
 284
 285     if ( direction & wxVERTICAL )
 286         new_y = (heightParent - height)/2;
 287
 288     Move(new_x, new_y);
 289 }
 290
 291 // fits the window around the children
 292 void wxWindowBase::Fit()
 293 {
 294     int maxX = 0,
 295         maxY = 0;
 296
 297     wxWindowList::Node *node = GetChildren().GetFirst();
 298     while ( node )
 299     {
 300         wxWindow *win = node->GetData();
 301         int wx, wy, ww, wh;
 302         win->GetPosition(&wx, &wy);
 303         win->GetSize(&ww, &wh);
 304         if ( wx + ww > maxX )
 305             maxX = wx + ww;
 306         if ( wy + wh > maxY )
 307             maxY = wy + wh;
 308
 309         node = node->GetNext();
 310     }
 311
 312     // leave a margin
 313     SetClientSize(maxX + 7, maxY + 14);
 314 }
 315
 316 // set the min/max size of the window
 317
 318 void wxWindowBase::SetSizeHints(int minW, int minH,
 319                                 int maxW, int maxH,
 320                                 int WXUNUSED(incW), int WXUNUSED(incH))
 321 {
 322     m_minWidth = minW;
 323     m_maxWidth = maxW;
 324     m_minHeight = minH;
 325     m_maxHeight = maxH;
 326 }
 327
 328 // ----------------------------------------------------------------------------
 329 // show/hide/enable/disable the window
 330 // ----------------------------------------------------------------------------
 331
 332 bool wxWindowBase::Show(bool show)
 333 {
 334     if ( show != m_isShown )
 335     {
 336         m_isShown = show;
 337
 338         return TRUE;
 339     }
 340     else
 341     {
 342         return FALSE;
 343     }
 344 }
 345
 346 bool wxWindowBase::Enable(bool enable)
 347 {
 348     if ( enable != m_isEnabled )
 349     {
 350         m_isEnabled = enable;
 351
 352         return TRUE;
 353     }
 354     else
 355     {
 356         return FALSE;
 357     }
 358 }
 359
 360 // ----------------------------------------------------------------------------
 361 // reparenting the window
 362 // ----------------------------------------------------------------------------
 363
 364 void wxWindowBase::AddChild(wxWindowBase *child)
 365 {
 366     wxCHECK_RET( child, _T("can't add a NULL child") );
 367
 368     GetChildren().Append(child);
 369     child->SetParent(this);
 370 }
 371
 372 void wxWindowBase::RemoveChild(wxWindowBase *child)
 373 {
 374     wxCHECK_RET( child, _T("can't remove a NULL child") );
 375
 376     GetChildren().DeleteObject(child);
 377     child->SetParent((wxWindow *)NULL);
 378 }
 379
 380 bool wxWindowBase::Reparent(wxWindowBase *newParent)
 381 {
 382     wxWindow *oldParent = GetParent();
 383     if ( newParent == oldParent )
 384     {
 385         // nothing done
 386         return FALSE;
 387     }
 388
 389     // unlink this window from the existing parent.
 390     if ( oldParent )
 391     {
 392         oldParent->RemoveChild(this);
 393     }
 394     else
 395     {
 396         wxTopLevelWindows.DeleteObject(this);
 397     }
 398
 399     // add it to the new one
 400     if ( newParent )
 401     {
 402         newParent->AddChild(this);
 403     }
 404     else
 405     {
 406         wxTopLevelWindows.Append(this);
 407     }
 408
 409     return TRUE;
 410 }
 411
 412 // ----------------------------------------------------------------------------
 413 // event handler stuff
 414 // ----------------------------------------------------------------------------
 415
 416 void wxWindowBase::PushEventHandler(wxEvtHandler *handler)
 417 {
 418     handler->SetNextHandler(GetEventHandler());
 419     SetEventHandler(handler);
 420 }
 421
 422 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
 423 {
 424     wxEvtHandler *handlerA = GetEventHandler();
 425     if ( handlerA )
 426     {
 427         wxEvtHandler *handlerB = handlerA->GetNextHandler();
 428         handlerA->SetNextHandler((wxEvtHandler *)NULL);
 429         SetEventHandler(handlerB);
 430         if ( deleteHandler )
 431         {
 432             delete handlerA;
 433             handlerA = (wxEvtHandler *)NULL;
 434         }
 435     }
 436
 437     return handlerA;
 438 }
 439
 440 // ----------------------------------------------------------------------------
 441 // cursors, fonts &c
 442 // ----------------------------------------------------------------------------
 443
 444 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
 445 {
 446     if ( !colour.Ok() || (colour == m_backgroundColour) )
 447         return FALSE;
 448
 449     m_backgroundColour = colour;
 450
 451     return TRUE;
 452 }
 453
 454 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
 455 {
 456     if ( !colour.Ok() || (colour == m_foregroundColour) )
 457         return FALSE;
 458
 459     m_foregroundColour = colour;
 460
 461     return TRUE;
 462 }
 463
 464 bool wxWindowBase::SetCursor(const wxCursor& cursor)
 465 {
 466     // don't try to set invalid cursor, always fall back to the default
 467     const wxCursor& cursorOk = cursor.Ok() ? cursor : *wxSTANDARD_CURSOR;
 468
 469     if ( cursorOk == m_cursor )
 470     {
 471         // no change
 472         return FALSE;
 473     }
 474
 475     m_cursor = cursorOk;
 476
 477     return TRUE;
 478 }
 479
 480 bool wxWindowBase::SetFont(const wxFont& font)
 481 {
 482     // don't try to set invalid font, always fall back to the default
 483     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 484
 485     if ( fontOk == m_font )
 486     {
 487         // no change
 488         return FALSE;
 489     }
 490
 491     m_font = fontOk;
 492
 493     return TRUE;
 494 }
 495
 496 // ----------------------------------------------------------------------------
 497 // validators
 498 // ----------------------------------------------------------------------------
 499
 500 void wxWindowBase::SetValidator(const wxValidator& validator)
 501 {
 502     if ( m_windowValidator )
 503         delete m_windowValidator;
 504
 505     m_windowValidator = (wxValidator *)validator.Clone();
 506
 507     if ( m_windowValidator )
 508         m_windowValidator->SetWindow(this) ;
 509 }
 510
 511 // ----------------------------------------------------------------------------
 512 // update region testing
 513 // ----------------------------------------------------------------------------
 514
 515 bool wxWindowBase::IsExposed(int x, int y) const
 516 {
 517     return m_updateRegion.Contains(x, y) != wxOutRegion;
 518 }
 519
 520 bool wxWindowBase::IsExposed(int x, int y, int w, int h) const
 521 {
 522     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
 523 }
 524
 525 // ----------------------------------------------------------------------------
 526 // find window by id or name
 527 // ----------------------------------------------------------------------------
 528
 529 wxWindow *wxWindowBase::FindWindow( long id )
 530 {
 531     if ( id == m_windowId )
 532         return (wxWindow *)this;
 533
 534     wxWindowBase *res = (wxWindow *)NULL;
 535     wxWindowList::Node *node;
 536     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 537     {
 538         wxWindowBase *child = node->GetData();
 539         res = child->FindWindow( id );
 540     }
 541
 542     return (wxWindow *)res;
 543 }
 544
 545 wxWindow *wxWindowBase::FindWindow( const wxString& name )
 546 {
 547     if ( name == m_windowName )
 548         return (wxWindow *)this;
 549
 550     wxWindowBase *res = (wxWindow *)NULL;
 551     wxWindowList::Node *node;
 552     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 553     {
 554         wxWindow *child = node->GetData();
 555         res = child->FindWindow(name);
 556     }
 557
 558     return (wxWindow *)res;
 559 }
 560
 561 // ----------------------------------------------------------------------------
 562 // dialog oriented functions
 563 // ----------------------------------------------------------------------------
 564
 565 void wxWindowBase::MakeModal(bool modal)
 566 {
 567     wxFAIL_MSG("TODO");
 568 }
 569
 570 bool wxWindowBase::Validate()
 571 {
 572     wxWindowList::Node *node;
 573     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 574     {
 575         wxWindowBase *child = node->GetData();
 576         wxValidator *validator = child->GetValidator();
 577         if ( validator && validator->Validate(this) )
 578         {
 579             return FALSE;
 580         }
 581     }
 582
 583     return TRUE;
 584 }
 585
 586 bool wxWindowBase::TransferDataToWindow()
 587 {
 588     wxWindowList::Node *node;
 589     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 590     {
 591         wxWindowBase *child = node->GetData();
 592         wxValidator *validator = child->GetValidator();
 593         if ( validator && !validator->TransferToWindow() )
 594         {
 595             wxLog *log = wxLog::GetActiveTarget();
 596             if ( log )
 597             {
 598                 wxLogWarning(_("Could not transfer data to window"));
 599                 log->Flush();
 600             }
 601
 602             return FALSE;
 603         }
 604     }
 605
 606     return TRUE;
 607 }
 608
 609 bool wxWindowBase::TransferDataFromWindow()
 610 {
 611     wxWindowList::Node *node;
 612     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 613     {
 614         wxWindow *child = node->GetData();
 615         if ( child->GetValidator() &&
 616              !child->GetValidator()->TransferFromWindow() )
 617         {
 618             return FALSE;
 619         }
 620     }
 621
 622     return TRUE;
 623 }
 624
 625 void wxWindowBase::InitDialog()
 626 {
 627     wxInitDialogEvent event(GetId());
 628     event.SetEventObject( this );
 629     GetEventHandler()->ProcessEvent(event);
 630 }
 631
 632 // ----------------------------------------------------------------------------
 633 // tooltips
 634 // ----------------------------------------------------------------------------
 635
 636 #if wxUSE_TOOLTIPS
 637
 638 void wxWindowBase::SetToolTip( const wxString &tip )
 639 {
 640     // don't create the new tooltip if we already have one
 641     if ( m_tooltip )
 642     {
 643         m_tooltip->SetTip( tip );
 644     }
 645     else
 646     {
 647         SetToolTip( new wxToolTip( tip ) );
 648     }
 649
 650     // setting empty tooltip text does not remove the tooltip any more - use
 651     // SetToolTip((wxToolTip *)NULL) for this
 652 }
 653
 654 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
 655 {
 656     if ( m_tooltip )
 657         delete m_tooltip;
 658
 659     m_tooltip = tooltip;
 660 }
 661
 662 #endif // wxUSE_TOOLTIPS
 663
 664 // ----------------------------------------------------------------------------
 665 // constraints and sizers
 666 // ----------------------------------------------------------------------------
 667
 668 #if wxUSE_CONSTRAINTS
 669
 670 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
 671 {
 672     if ( m_constraints )
 673     {
 674         UnsetConstraints(m_constraints);
 675         delete m_constraints;
 676     }
 677     m_constraints = constraints;
 678     if ( m_constraints )
 679     {
 680         // Make sure other windows know they're part of a 'meaningful relationship'
 681         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
 682             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
 683         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
 684             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
 685         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
 686             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
 687         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
 688             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
 689         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
 690             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
 691         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
 692             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
 693         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
 694             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
 695         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
 696             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
 697     }
 698 }
 699
 700 // This removes any dangling pointers to this window in other windows'
 701 // constraintsInvolvedIn lists.
 702 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
 703 {
 704     if ( c )
 705     {
 706         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 707             c->left.GetOtherWindow()->RemoveConstraintReference(this);
 708         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 709             c->top.GetOtherWindow()->RemoveConstraintReference(this);
 710         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
 711             c->right.GetOtherWindow()->RemoveConstraintReference(this);
 712         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
 713             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
 714         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
 715             c->width.GetOtherWindow()->RemoveConstraintReference(this);
 716         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
 717             c->height.GetOtherWindow()->RemoveConstraintReference(this);
 718         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
 719             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
 720         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
 721             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
 722     }
 723 }
 724
 725 // Back-pointer to other windows we're involved with, so if we delete this
 726 // window, we must delete any constraints we're involved with.
 727 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
 728 {
 729     if ( !m_constraintsInvolvedIn )
 730         m_constraintsInvolvedIn = new wxWindowList;
 731     if ( !m_constraintsInvolvedIn->Find(otherWin) )
 732         m_constraintsInvolvedIn->Append(otherWin);
 733 }
 734
 735 // REMOVE back-pointer to other windows we're involved with.
 736 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
 737 {
 738     if ( m_constraintsInvolvedIn )
 739         m_constraintsInvolvedIn->DeleteObject(otherWin);
 740 }
 741
 742 // Reset any constraints that mention this window
 743 void wxWindowBase::DeleteRelatedConstraints()
 744 {
 745     if ( m_constraintsInvolvedIn )
 746     {
 747         wxWindowList::Node *node = m_constraintsInvolvedIn->GetFirst();
 748         while (node)
 749         {
 750             wxWindow *win = node->GetData();
 751             wxLayoutConstraints *constr = win->GetConstraints();
 752
 753             // Reset any constraints involving this window
 754             if ( constr )
 755             {
 756                 constr->left.ResetIfWin(this);
 757                 constr->top.ResetIfWin(this);
 758                 constr->right.ResetIfWin(this);
 759                 constr->bottom.ResetIfWin(this);
 760                 constr->width.ResetIfWin(this);
 761                 constr->height.ResetIfWin(this);
 762                 constr->centreX.ResetIfWin(this);
 763                 constr->centreY.ResetIfWin(this);
 764             }
 765
 766             wxWindowList::Node *next = node->GetNext();
 767             delete node;
 768             node = next;
 769         }
 770
 771         delete m_constraintsInvolvedIn;
 772         m_constraintsInvolvedIn = (wxWindowList *) NULL;
 773     }
 774 }
 775
 776 void wxWindowBase::SetSizer(wxSizer *sizer)
 777 {
 778     m_windowSizer = sizer;
 779     if ( sizer )
 780         sizer->SetSizerParent(this);
 781 }
 782
 783 bool wxWindowBase::Layout()
 784 {
 785     if ( GetConstraints() )
 786     {
 787         int w, h;
 788         GetClientSize(&w, &h);
 789         GetConstraints()->width.SetValue(w);
 790         GetConstraints()->height.SetValue(h);
 791     }
 792
 793     // If top level (one sizer), evaluate the sizer's constraints.
 794     if ( GetSizer() )
 795     {
 796         int noChanges;
 797         GetSizer()->ResetConstraints();   // Mark all constraints as unevaluated
 798         GetSizer()->LayoutPhase1(&noChanges);
 799         GetSizer()->LayoutPhase2(&noChanges);
 800         GetSizer()->SetConstraintSizes(); // Recursively set the real window sizes
 801         return TRUE;
 802     }
 803     else
 804     {
 805         // Otherwise, evaluate child constraints
 806         ResetConstraints();   // Mark all constraints as unevaluated
 807         DoPhase(1);           // Just one phase need if no sizers involved
 808         DoPhase(2);
 809         SetConstraintSizes(); // Recursively set the real window sizes
 810     }
 811     return TRUE;
 812 }
 813
 814
 815 // Do a phase of evaluating constraints: the default behaviour. wxSizers may
 816 // do a similar thing, but also impose their own 'constraints' and order the
 817 // evaluation differently.
 818 bool wxWindowBase::LayoutPhase1(int *noChanges)
 819 {
 820     wxLayoutConstraints *constr = GetConstraints();
 821     if ( constr )
 822     {
 823         return constr->SatisfyConstraints(this, noChanges);
 824     }
 825     else
 826         return TRUE;
 827 }
 828
 829 bool wxWindowBase::LayoutPhase2(int *noChanges)
 830 {
 831     *noChanges = 0;
 832
 833     // Layout children
 834     DoPhase(1);
 835     DoPhase(2);
 836     return TRUE;
 837 }
 838
 839 // Do a phase of evaluating child constraints
 840 bool wxWindowBase::DoPhase(int phase)
 841 {
 842     int noIterations = 0;
 843     int maxIterations = 500;
 844     int noChanges = 1;
 845     int noFailures = 0;
 846     wxWindowList succeeded;
 847     while ((noChanges > 0) && (noIterations < maxIterations))
 848     {
 849         noChanges = 0;
 850         noFailures = 0;
 851         wxWindowList::Node *node = GetChildren().GetFirst();
 852         while (node)
 853         {
 854             wxWindow *child = node->GetData();
 855             if ( !child->IsKindOf(CLASSINFO(wxFrame)) && !child->IsKindOf(CLASSINFO(wxDialog)) )
 856             {
 857                 wxLayoutConstraints *constr = child->GetConstraints();
 858                 if ( constr )
 859                 {
 860                     if ( !succeeded.Find(child) )
 861                     {
 862                         int tempNoChanges = 0;
 863                         bool success = ( (phase == 1) ? child->LayoutPhase1(&tempNoChanges) : child->LayoutPhase2(&tempNoChanges) ) ;
 864                         noChanges += tempNoChanges;
 865                         if ( success )
 866                         {
 867                             succeeded.Append(child);
 868                         }
 869                     }
 870                 }
 871             }
 872             node = node->GetNext();
 873         }
 874
 875         noIterations++;
 876     }
 877
 878     return TRUE;
 879 }
 880
 881 void wxWindowBase::ResetConstraints()
 882 {
 883     wxLayoutConstraints *constr = GetConstraints();
 884     if ( constr )
 885     {
 886         constr->left.SetDone(FALSE);
 887         constr->top.SetDone(FALSE);
 888         constr->right.SetDone(FALSE);
 889         constr->bottom.SetDone(FALSE);
 890         constr->width.SetDone(FALSE);
 891         constr->height.SetDone(FALSE);
 892         constr->centreX.SetDone(FALSE);
 893         constr->centreY.SetDone(FALSE);
 894     }
 895     wxWindowList::Node *node = GetChildren().GetFirst();
 896     while (node)
 897     {
 898         wxWindow *win = node->GetData();
 899         if ( !win->IsKindOf(CLASSINFO(wxFrame)) && !win->IsKindOf(CLASSINFO(wxDialog)) )
 900             win->ResetConstraints();
 901         node = node->GetNext();
 902     }
 903 }
 904
 905 // Need to distinguish between setting the 'fake' size for windows and sizers,
 906 // and setting the real values.
 907 void wxWindowBase::SetConstraintSizes(bool recurse)
 908 {
 909     wxLayoutConstraints *constr = GetConstraints();
 910     if ( constr && constr->left.GetDone() && constr->right.GetDone( ) &&
 911             constr->width.GetDone() && constr->height.GetDone())
 912     {
 913         int x = constr->left.GetValue();
 914         int y = constr->top.GetValue();
 915         int w = constr->width.GetValue();
 916         int h = constr->height.GetValue();
 917
 918         // If we don't want to resize this window, just move it...
 919         if ( (constr->width.GetRelationship() != wxAsIs ) ||
 920                 (constr->height.GetRelationship() != wxAsIs))
 921         {
 922             // Calls Layout() recursively. AAAGH. How can we stop that.
 923             // Simply take Layout() out of non-top level OnSizes.
 924             SizerSetSize(x, y, w, h);
 925         }
 926         else
 927         {
 928             SizerMove(x, y);
 929         }
 930     }
 931     else if ( constr )
 932     {
 933         wxChar *windowClass = GetClassInfo()->GetClassName();
 934
 935         wxString winName;
 936         if ( GetName() == _T("") )
 937             winName = _T("unnamed");
 938         else
 939             winName = GetName();
 940         wxLogDebug( _T("Constraint(s) not satisfied for window of type %s, name %s:\n"),
 941                 (const wxChar *)windowClass,
 942                 (const wxChar *)winName);
 943         if ( !constr->left.GetDone()) wxLogDebug( _T("  unsatisfied 'left' constraint.\n")  );
 944         if ( !constr->right.GetDone()) wxLogDebug( _T("  unsatisfied 'right' constraint.\n")  );
 945         if ( !constr->width.GetDone()) wxLogDebug( _T("  unsatisfied 'width' constraint.\n")  );
 946         if ( !constr->height.GetDone())  wxLogDebug( _T("  unsatisfied 'height' constraint.\n")  );
 947         wxLogDebug( _T("Please check constraints: try adding AsIs() constraints.\n") );
 948     }
 949
 950     if ( recurse )
 951     {
 952         wxWindowList::Node *node = GetChildren().GetFirst();
 953         while (node)
 954         {
 955             wxWindow *win = node->GetData();
 956             if ( !win->IsKindOf(CLASSINFO(wxFrame)) && !win->IsKindOf(CLASSINFO(wxDialog)) )
 957                 win->SetConstraintSizes();
 958             node = node->GetNext();
 959         }
 960     }
 961 }
 962
 963 // This assumes that all sizers are 'on' the same window, i.e. the parent of
 964 // this window.
 965 void wxWindowBase::TransformSizerToActual(int *x, int *y) const
 966 {
 967     if ( !m_sizerParent || m_sizerParent->IsKindOf(CLASSINFO(wxDialog) ) ||
 968             m_sizerParent->IsKindOf(CLASSINFO(wxFrame)) )
 969         return;
 970
 971     int xp, yp;
 972     m_sizerParent->GetPosition(&xp, &yp);
 973     m_sizerParent->TransformSizerToActual(&xp, &yp);
 974     *x += xp;
 975     *y += yp;
 976 }
 977
 978 void wxWindowBase::SizerSetSize(int x, int y, int w, int h)
 979 {
 980     int xx = x;
 981     int yy = y;
 982     TransformSizerToActual(&xx, &yy);
 983     SetSize(xx, yy, w, h);
 984 }
 985
 986 void wxWindowBase::SizerMove(int x, int y)
 987 {
 988     int xx = x;
 989     int yy = y;
 990     TransformSizerToActual(&xx, &yy);
 991     Move(xx, yy);
 992 }
 993
 994 // Only set the size/position of the constraint (if any)
 995 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
 996 {
 997     wxLayoutConstraints *constr = GetConstraints();
 998     if ( constr )
 999     {
1000         if ( x != -1 )
1001         {
1002             constr->left.SetValue(x);
1003             constr->left.SetDone(TRUE);
1004         }
1005         if ( y != -1 )
1006         {
1007             constr->top.SetValue(y);
1008             constr->top.SetDone(TRUE);
1009         }
1010         if ( w != -1 )
1011         {
1012             constr->width.SetValue(w);
1013             constr->width.SetDone(TRUE);
1014         }
1015         if ( h != -1 )
1016         {
1017             constr->height.SetValue(h);
1018             constr->height.SetDone(TRUE);
1019         }
1020     }
1021 }
1022
1023 void wxWindowBase::MoveConstraint(int x, int y)
1024 {
1025     wxLayoutConstraints *constr = GetConstraints();
1026     if ( constr )
1027     {
1028         if ( x != -1 )
1029         {
1030             constr->left.SetValue(x);
1031             constr->left.SetDone(TRUE);
1032         }
1033         if ( y != -1 )
1034         {
1035             constr->top.SetValue(y);
1036             constr->top.SetDone(TRUE);
1037         }
1038     }
1039 }
1040
1041 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
1042 {
1043     wxLayoutConstraints *constr = GetConstraints();
1044     if ( constr )
1045     {
1046         *w = constr->width.GetValue();
1047         *h = constr->height.GetValue();
1048     }
1049     else
1050         GetSize(w, h);
1051 }
1052
1053 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
1054 {
1055     wxLayoutConstraints *constr = GetConstraints();
1056     if ( constr )
1057     {
1058         *w = constr->width.GetValue();
1059         *h = constr->height.GetValue();
1060     }
1061     else
1062         GetClientSize(w, h);
1063 }
1064
1065 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
1066 {
1067     wxLayoutConstraints *constr = GetConstraints();
1068     if ( constr )
1069     {
1070         *x = constr->left.GetValue();
1071         *y = constr->top.GetValue();
1072     }
1073     else
1074         GetPosition(x, y);
1075 }
1076
1077 #endif // wxUSE_CONSTRAINTS
1078
1079 // ----------------------------------------------------------------------------
1080 // do Update UI processing for child controls
1081 // ----------------------------------------------------------------------------
1082
1083 // TODO: should this be implemented for the child window rather
1084 // than the parent? Then you can override it e.g. for wxCheckBox
1085 // to do the Right Thing rather than having to assume a fixed number
1086 // of control classes.
1087 void wxWindowBase::UpdateWindowUI()
1088 {
1089     wxWindowID id = GetId();
1090     if ( id > 0 )
1091     {
1092         wxUpdateUIEvent event(id);
1093         event.m_eventObject = this;
1094
1095         if ( GetEventHandler()->ProcessEvent(event) )
1096         {
1097             if ( event.GetSetEnabled() )
1098                 Enable(event.GetEnabled());
1099
1100             if ( event.GetSetText() && IsKindOf(CLASSINFO(wxControl)) )
1101                 ((wxControl*)this)->SetLabel(event.GetText());
1102
1103             if ( IsKindOf(CLASSINFO(wxCheckBox)) )
1104             {
1105                 if ( event.GetSetChecked() )
1106                     ((wxCheckBox *)this)->SetValue(event.GetChecked());
1107             }
1108             // TODO No radio buttons in wxGTK yet
1109 #ifndef __WXGTK__
1110             else if ( IsKindOf(CLASSINFO(wxRadioButton)) )
1111             {
1112                 if ( event.GetSetChecked() )
1113                     ((wxRadioButton *) this)->SetValue(event.GetChecked());
1114             }
1115 #endif // !wxGTK
1116         }
1117     }
1118 }
1119
1120 // ----------------------------------------------------------------------------
1121 // dialog units translations
1122 // ----------------------------------------------------------------------------
1123
1124 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
1125 {
1126     int charWidth = GetCharWidth();
1127     int charHeight = GetCharHeight();
1128     wxPoint pt2;
1129     pt2.x = (int) ((pt.x * 4) / charWidth) ;
1130     pt2.y = (int) ((pt.y * 8) / charHeight) ;
1131
1132     return pt2;
1133 }
1134
1135 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
1136 {
1137     int charWidth = GetCharWidth();
1138     int charHeight = GetCharHeight();
1139     wxPoint pt2;
1140     pt2.x = (int) ((pt.x * charWidth) / 4) ;
1141     pt2.y = (int) ((pt.y * charHeight) / 8) ;
1142
1143     return pt2;
1144 }
1145
1146 // ----------------------------------------------------------------------------
1147 // event handlers
1148 // ----------------------------------------------------------------------------
1149
1150 // propagate the colour change event to the subwindows
1151 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
1152 {
1153     wxWindowList::Node *node = GetChildren().GetFirst();
1154     while ( node )
1155     {
1156         // Only propagate to non-top-level windows
1157         wxWindow *win = node->GetData();
1158         if ( !win->IsTopLevel() )
1159         {
1160             wxSysColourChangedEvent event2;
1161             event.m_eventObject = win;
1162             win->GetEventHandler()->ProcessEvent(event2);
1163         }
1164
1165         node = node->GetNext();
1166     }
1167 }
1168
1169 // the default action is to populate dialog with data when it's created
1170 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
1171 {
1172     TransferDataToWindow();
1173 }
1174
1175 // ----------------------------------------------------------------------------
1176 // list classes implementation
1177 // ----------------------------------------------------------------------------
1178
1179 void wxWindowListNode::DeleteData()
1180 {
1181     delete (wxWindow *)GetData();
1182 }
1183