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 #ifdef __GNUG__
  21     #pragma implementation "windowbase.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/string.h"
  33     #include "wx/log.h"
  34     #include "wx/intl.h"
  35     #include "wx/frame.h"
  36     #include "wx/defs.h"
  37     #include "wx/window.h"
  38     #include "wx/checkbox.h"
  39     #include "wx/radiobut.h"
  40     #include "wx/settings.h"
  41     #include "wx/dialog.h"
  42 #endif //WX_PRECOMP
  43
  44 #if wxUSE_CONSTRAINTS
  45     #include "wx/layout.h"
  46 #endif // wxUSE_CONSTRAINTS
  47
  48 #if wxUSE_DRAG_AND_DROP
  49     #include "wx/dnd.h"
  50 #endif // wxUSE_DRAG_AND_DROP
  51
  52 #if wxUSE_TOOLTIPS
  53     #include "wx/tooltip.h"
  54 #endif // wxUSE_TOOLTIPS
  55
  56 // ----------------------------------------------------------------------------
  57 // static data
  58 // ----------------------------------------------------------------------------
  59
  60 int wxWindowBase::ms_lastControlId = -2;
  61
  62 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  63
  64 // ----------------------------------------------------------------------------
  65 // event table
  66 // ----------------------------------------------------------------------------
  67
  68 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  69     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  70     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  71 END_EVENT_TABLE()
  72
  73 // ============================================================================
  74 // implementation of the common functionality of the wxWindow class
  75 // ============================================================================
  76
  77 // ----------------------------------------------------------------------------
  78 // initialization
  79 // ----------------------------------------------------------------------------
  80
  81 // the default initialization
  82 void wxWindowBase::InitBase()
  83 {
  84     // no window yet, no parent nor children
  85     m_parent = (wxWindow *)NULL;
  86     m_windowId = -1;
  87     m_children.DeleteContents( FALSE ); // don't auto delete node data
  88
  89     // no constraints on the minimal window size
  90     m_minWidth =
  91     m_minHeight =
  92     m_maxWidth =
  93     m_maxHeight = -1;
  94
  95     // window is created enabled but it's not visible yet
  96     m_isShown = FALSE;
  97     m_isEnabled = TRUE;
  98
  99     // no client data
 100     m_clientObject = (wxClientData *)NULL;
 101     m_clientData = NULL;
 102
 103     // the default event handler is just this window
 104     m_eventHandler = this;
 105
 106     // no validator
 107     m_windowValidator = (wxValidator *) NULL;
 108
 109     // use the system default colours
 110     wxSystemSettings settings;
 111
 112     m_backgroundColour = settings.GetSystemColour(wxSYS_COLOUR_BTNFACE);
 113     m_foregroundColour = *wxBLACK;  // TODO take this from sys settings too?
 114     m_font = *wxSWISS_FONT;         //      and this?
 115
 116     // no style bits
 117     m_windowStyle = 0;
 118
 119     // an optimization for the event processing: checking this flag is much
 120     // faster than using IsKindOf(CLASSINFO(wxWindow))
 121     m_isWindow = TRUE;
 122
 123 #if wxUSE_CONSTRAINTS
 124     // no constraints whatsoever
 125     m_constraints = (wxLayoutConstraints *) NULL;
 126     m_constraintsInvolvedIn = (wxWindowList *) NULL;
 127     m_windowSizer = (wxSizer *) NULL;
 128     m_sizerParent = (wxWindowBase *) NULL;
 129     m_autoLayout = FALSE;
 130 #endif // wxUSE_CONSTRAINTS
 131
 132 #if wxUSE_DRAG_AND_DROP
 133     m_dropTarget = (wxDropTarget *)NULL;
 134 #endif // wxUSE_DRAG_AND_DROP
 135
 136 #if wxUSE_TOOLTIPS
 137     m_tooltip = (wxToolTip *)NULL;
 138 #endif // wxUSE_TOOLTIPS
 139 }
 140
 141 // common part of window creation process
 142 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 143                               wxWindowID id,
 144                               const wxPoint& WXUNUSED(pos),
 145                               const wxSize& WXUNUSED(size),
 146                               long style,
 147                               const wxString& name)
 148 {
 149     // m_isWindow is set to TRUE in wxWindowBase::Init() as well as many other
 150     // member variables - check that it has been called (will catch the case
 151     // when a new ctor is added which doesn't call InitWindow)
 152     wxASSERT_MSG( m_isWindow, _T("Init() must have been called before!") );
 153
 154     // generate a new id if the user doesn't care about it
 155     m_windowId = id == -1 ? NewControlId() : id;
 156
 157     SetName(name);
 158     SetWindowStyleFlag(style);
 159     SetParent(parent);
 160
 161     return TRUE;
 162 }
 163
 164 // ----------------------------------------------------------------------------
 165 // destruction
 166 // ----------------------------------------------------------------------------
 167
 168 // common clean up
 169 wxWindowBase::~wxWindowBase()
 170 {
 171     // FIXME if these 2 cases result from programming errors in the user code
 172     //       we should probably assert here instead of silently fixing them
 173
 174     // Just in case the window has been Closed, but we're then deleting
 175     // immediately: don't leave dangling pointers.
 176     wxPendingDelete.DeleteObject(this);
 177
 178     // Just in case we've loaded a top-level window via LoadNativeDialog but
 179     // we weren't a dialog class
 180     wxTopLevelWindows.DeleteObject(this);
 181
 182     wxASSERT_MSG( GetChildren().GetCount() == 0, _T("children not destroyed") );
 183
 184     if ( m_windowValidator )
 185         delete m_windowValidator;
 186
 187     if ( m_clientObject )
 188         delete m_clientObject;
 189
 190 #if wxUSE_CONSTRAINTS
 191     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 192     // at deleted windows as they delete themselves.
 193     DeleteRelatedConstraints();
 194
 195     if ( m_constraints )
 196     {
 197         // This removes any dangling pointers to this window in other windows'
 198         // constraintsInvolvedIn lists.
 199         UnsetConstraints(m_constraints);
 200         delete m_constraints;
 201         m_constraints = NULL;
 202     }
 203
 204     if ( m_windowSizer )
 205         delete m_windowSizer;
 206
 207     // If this is a child of a sizer, remove self from parent
 208     if ( m_sizerParent )
 209         m_sizerParent->RemoveChild(this);
 210 #endif // wxUSE_CONSTRAINTS
 211
 212 #if wxUSE_DRAG_AND_DROP
 213     if ( m_dropTarget )
 214         delete m_dropTarget;
 215 #endif // wxUSE_DRAG_AND_DROP
 216
 217 #if wxUSE_TOOLTIPS
 218     if ( m_tooltip )
 219         delete m_tooltip;
 220 #endif // wxUSE_TOOLTIPS
 221 }
 222
 223 bool wxWindowBase::Destroy()
 224 {
 225     delete this;
 226
 227     return TRUE;
 228 }
 229
 230 bool wxWindowBase::Close(bool force)
 231 {
 232     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 233     event.SetEventObject(this);
 234 #if WXWIN_COMPATIBILITY
 235     event.SetForce(force);
 236 #endif // WXWIN_COMPATIBILITY
 237     event.SetCanVeto(!force);
 238
 239     // return FALSE if window wasn't closed because the application vetoed the
 240     // close event
 241     return GetEventHandler()->ProcessEvent(event) && !event.GetVeto();
 242 }
 243
 244 bool wxWindowBase::DestroyChildren()
 245 {
 246     wxWindowList::Node *node;
 247     for ( ;; )
 248     {
 249         // we iterate until the list becomes empty
 250         node = GetChildren().GetFirst();
 251         if ( !node )
 252             break;
 253
 254         wxWindow *child = node->GetData();
 255
 256         wxASSERT_MSG( child, _T("children list contains empty nodes") );
 257
 258         delete child;
 259
 260         wxASSERT_MSG( !GetChildren().Find(child),
 261                       _T("child didn't remove itself using RemoveChild()") );
 262     }
 263
 264     return TRUE;
 265 }
 266
 267 // ----------------------------------------------------------------------------
 268 // centre/fit the window
 269 // ----------------------------------------------------------------------------
 270
 271 // centre the window with respect to its parent in either (or both) directions
 272 void wxWindowBase::Centre(int direction)
 273 {
 274     int widthParent, heightParent;
 275
 276     wxWindow *parent = GetParent();
 277     if ( parent )
 278     {
 279         parent->GetClientSize(&widthParent, &heightParent);
 280     }
 281     else
 282     {
 283         // centre with respect to the whole screen
 284         wxDisplaySize(&widthParent, &heightParent);
 285     }
 286
 287     int width, height;
 288     GetSize(&width, &height);
 289
 290     int new_x = -1,
 291         new_y = -1;
 292
 293     if ( direction & wxHORIZONTAL )
 294         new_x = (widthParent - width)/2;
 295
 296     if ( direction & wxVERTICAL )
 297         new_y = (heightParent - height)/2;
 298
 299     Move(new_x, new_y);
 300 }
 301
 302 // fits the window around the children
 303 void wxWindowBase::Fit()
 304 {
 305     int maxX = 0,
 306         maxY = 0;
 307
 308     wxWindowList::Node *node = GetChildren().GetFirst();
 309     while ( node )
 310     {
 311         wxWindow *win = node->GetData();
 312         int wx, wy, ww, wh;
 313         win->GetPosition(&wx, &wy);
 314         win->GetSize(&ww, &wh);
 315         if ( wx + ww > maxX )
 316             maxX = wx + ww;
 317         if ( wy + wh > maxY )
 318             maxY = wy + wh;
 319
 320         node = node->GetNext();
 321     }
 322
 323     // leave a margin
 324     SetClientSize(maxX + 7, maxY + 14);
 325 }
 326
 327 // set the min/max size of the window
 328
 329 void wxWindowBase::SetSizeHints(int minW, int minH,
 330                                 int maxW, int maxH,
 331                                 int WXUNUSED(incW), int WXUNUSED(incH))
 332 {
 333     m_minWidth = minW;
 334     m_maxWidth = maxW;
 335     m_minHeight = minH;
 336     m_maxHeight = maxH;
 337 }
 338
 339 // ----------------------------------------------------------------------------
 340 // show/hide/enable/disable the window
 341 // ----------------------------------------------------------------------------
 342
 343 bool wxWindowBase::Show(bool show)
 344 {
 345     if ( show != m_isShown )
 346     {
 347         m_isShown = show;
 348
 349         return TRUE;
 350     }
 351     else
 352     {
 353         return FALSE;
 354     }
 355 }
 356
 357 bool wxWindowBase::Enable(bool enable)
 358 {
 359     if ( enable != m_isEnabled )
 360     {
 361         m_isEnabled = enable;
 362
 363         return TRUE;
 364     }
 365     else
 366     {
 367         return FALSE;
 368     }
 369 }
 370
 371 // ----------------------------------------------------------------------------
 372 // reparenting the window
 373 // ----------------------------------------------------------------------------
 374
 375 void wxWindowBase::AddChild(wxWindowBase *child)
 376 {
 377     wxCHECK_RET( child, _T("can't add a NULL child") );
 378
 379     GetChildren().Append(child);
 380     child->SetParent(this);
 381 }
 382
 383 void wxWindowBase::RemoveChild(wxWindowBase *child)
 384 {
 385     wxCHECK_RET( child, _T("can't remove a NULL child") );
 386
 387     GetChildren().DeleteObject(child);
 388     child->SetParent((wxWindow *)NULL);
 389 }
 390
 391 bool wxWindowBase::Reparent(wxWindowBase *newParent)
 392 {
 393     wxWindow *oldParent = GetParent();
 394     if ( newParent == oldParent )
 395     {
 396         // nothing done
 397         return FALSE;
 398     }
 399
 400     // unlink this window from the existing parent.
 401     if ( oldParent )
 402     {
 403         oldParent->RemoveChild(this);
 404     }
 405     else
 406     {
 407         wxTopLevelWindows.DeleteObject(this);
 408     }
 409
 410     // add it to the new one
 411     if ( newParent )
 412     {
 413         newParent->AddChild(this);
 414     }
 415     else
 416     {
 417         wxTopLevelWindows.Append(this);
 418     }
 419
 420     return TRUE;
 421 }
 422
 423 // ----------------------------------------------------------------------------
 424 // event handler stuff
 425 // ----------------------------------------------------------------------------
 426
 427 void wxWindowBase::PushEventHandler(wxEvtHandler *handler)
 428 {
 429     handler->SetNextHandler(GetEventHandler());
 430     SetEventHandler(handler);
 431 }
 432
 433 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
 434 {
 435     wxEvtHandler *handlerA = GetEventHandler();
 436     if ( handlerA )
 437     {
 438         wxEvtHandler *handlerB = handlerA->GetNextHandler();
 439         handlerA->SetNextHandler((wxEvtHandler *)NULL);
 440         SetEventHandler(handlerB);
 441         if ( deleteHandler )
 442         {
 443             delete handlerA;
 444             handlerA = (wxEvtHandler *)NULL;
 445         }
 446     }
 447
 448     return handlerA;
 449 }
 450
 451 // ----------------------------------------------------------------------------
 452 // cursors, fonts &c
 453 // ----------------------------------------------------------------------------
 454
 455 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
 456 {
 457     if ( !colour.Ok() || (colour == m_backgroundColour) )
 458         return FALSE;
 459
 460     m_backgroundColour = colour;
 461
 462     return TRUE;
 463 }
 464
 465 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
 466 {
 467     if ( !colour.Ok() || (colour == m_foregroundColour) )
 468         return FALSE;
 469
 470     m_foregroundColour = colour;
 471
 472     return TRUE;
 473 }
 474
 475 bool wxWindowBase::SetCursor(const wxCursor& cursor)
 476 {
 477     // don't try to set invalid cursor, always fall back to the default
 478     const wxCursor& cursorOk = cursor.Ok() ? cursor : *wxSTANDARD_CURSOR;
 479
 480     if ( cursorOk == m_cursor )
 481     {
 482         // no change
 483         return FALSE;
 484     }
 485
 486     m_cursor = cursorOk;
 487
 488     return TRUE;
 489 }
 490
 491 bool wxWindowBase::SetFont(const wxFont& font)
 492 {
 493     // don't try to set invalid font, always fall back to the default
 494     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 495
 496     if ( fontOk == m_font )
 497     {
 498         // no change
 499         return FALSE;
 500     }
 501
 502     m_font = fontOk;
 503
 504     return TRUE;
 505 }
 506
 507 // ----------------------------------------------------------------------------
 508 // validators
 509 // ----------------------------------------------------------------------------
 510
 511 void wxWindowBase::SetValidator(const wxValidator& validator)
 512 {
 513     if ( m_windowValidator )
 514         delete m_windowValidator;
 515
 516     m_windowValidator = (wxValidator *)validator.Clone();
 517
 518     if ( m_windowValidator )
 519         m_windowValidator->SetWindow(this) ;
 520 }
 521
 522 // ----------------------------------------------------------------------------
 523 // update region testing
 524 // ----------------------------------------------------------------------------
 525
 526 bool wxWindowBase::IsExposed(int x, int y) const
 527 {
 528     return m_updateRegion.Contains(x, y) != wxOutRegion;
 529 }
 530
 531 bool wxWindowBase::IsExposed(int x, int y, int w, int h) const
 532 {
 533     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
 534 }
 535
 536 // ----------------------------------------------------------------------------
 537 // find window by id or name
 538 // ----------------------------------------------------------------------------
 539
 540 wxWindow *wxWindowBase::FindWindow( long id )
 541 {
 542     if ( id == m_windowId )
 543         return (wxWindow *)this;
 544
 545     wxWindowBase *res = (wxWindow *)NULL;
 546     wxWindowList::Node *node;
 547     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 548     {
 549         wxWindowBase *child = node->GetData();
 550         res = child->FindWindow( id );
 551     }
 552
 553     return (wxWindow *)res;
 554 }
 555
 556 wxWindow *wxWindowBase::FindWindow( const wxString& name )
 557 {
 558     if ( name == m_windowName )
 559         return (wxWindow *)this;
 560
 561     wxWindowBase *res = (wxWindow *)NULL;
 562     wxWindowList::Node *node;
 563     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 564     {
 565         wxWindow *child = node->GetData();
 566         res = child->FindWindow(name);
 567     }
 568
 569     return (wxWindow *)res;
 570 }
 571
 572 // ----------------------------------------------------------------------------
 573 // dialog oriented functions
 574 // ----------------------------------------------------------------------------
 575
 576 void wxWindowBase::MakeModal(bool WXUNUSED(modal))
 577 {
 578     wxFAIL_MSG(_T("TODO"));
 579 }
 580
 581 bool wxWindowBase::Validate()
 582 {
 583     wxWindowList::Node *node;
 584     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 585     {
 586         wxWindowBase *child = node->GetData();
 587         wxValidator *validator = child->GetValidator();
 588         if ( validator && validator->Validate(this) )
 589         {
 590             return FALSE;
 591         }
 592     }
 593
 594     return TRUE;
 595 }
 596
 597 bool wxWindowBase::TransferDataToWindow()
 598 {
 599     wxWindowList::Node *node;
 600     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 601     {
 602         wxWindowBase *child = node->GetData();
 603         wxValidator *validator = child->GetValidator();
 604         if ( validator && !validator->TransferToWindow() )
 605         {
 606             wxLog *log = wxLog::GetActiveTarget();
 607             if ( log )
 608             {
 609                 wxLogWarning(_("Could not transfer data to window"));
 610                 log->Flush();
 611             }
 612
 613             return FALSE;
 614         }
 615     }
 616
 617     return TRUE;
 618 }
 619
 620 bool wxWindowBase::TransferDataFromWindow()
 621 {
 622     wxWindowList::Node *node;
 623     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 624     {
 625         wxWindow *child = node->GetData();
 626         if ( child->GetValidator() &&
 627              !child->GetValidator()->TransferFromWindow() )
 628         {
 629             return FALSE;
 630         }
 631     }
 632
 633     return TRUE;
 634 }
 635
 636 void wxWindowBase::InitDialog()
 637 {
 638     wxInitDialogEvent event(GetId());
 639     event.SetEventObject( this );
 640     GetEventHandler()->ProcessEvent(event);
 641 }
 642
 643 // ----------------------------------------------------------------------------
 644 // tooltips
 645 // ----------------------------------------------------------------------------
 646
 647 #if wxUSE_TOOLTIPS
 648
 649 void wxWindowBase::SetToolTip( const wxString &tip )
 650 {
 651     // don't create the new tooltip if we already have one
 652     if ( m_tooltip )
 653     {
 654         m_tooltip->SetTip( tip );
 655     }
 656     else
 657     {
 658         SetToolTip( new wxToolTip( tip ) );
 659     }
 660
 661     // setting empty tooltip text does not remove the tooltip any more - use
 662     // SetToolTip((wxToolTip *)NULL) for this
 663 }
 664
 665 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
 666 {
 667     if ( m_tooltip )
 668         delete m_tooltip;
 669
 670     m_tooltip = tooltip;
 671 }
 672
 673 #endif // wxUSE_TOOLTIPS
 674
 675 // ----------------------------------------------------------------------------
 676 // constraints and sizers
 677 // ----------------------------------------------------------------------------
 678
 679 #if wxUSE_CONSTRAINTS
 680
 681 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
 682 {
 683     if ( m_constraints )
 684     {
 685         UnsetConstraints(m_constraints);
 686         delete m_constraints;
 687     }
 688     m_constraints = constraints;
 689     if ( m_constraints )
 690     {
 691         // Make sure other windows know they're part of a 'meaningful relationship'
 692         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
 693             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
 694         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
 695             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
 696         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
 697             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
 698         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
 699             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
 700         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
 701             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
 702         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
 703             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
 704         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
 705             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
 706         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
 707             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
 708     }
 709 }
 710
 711 // This removes any dangling pointers to this window in other windows'
 712 // constraintsInvolvedIn lists.
 713 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
 714 {
 715     if ( c )
 716     {
 717         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 718             c->left.GetOtherWindow()->RemoveConstraintReference(this);
 719         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 720             c->top.GetOtherWindow()->RemoveConstraintReference(this);
 721         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
 722             c->right.GetOtherWindow()->RemoveConstraintReference(this);
 723         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
 724             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
 725         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
 726             c->width.GetOtherWindow()->RemoveConstraintReference(this);
 727         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
 728             c->height.GetOtherWindow()->RemoveConstraintReference(this);
 729         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
 730             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
 731         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
 732             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
 733     }
 734 }
 735
 736 // Back-pointer to other windows we're involved with, so if we delete this
 737 // window, we must delete any constraints we're involved with.
 738 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
 739 {
 740     if ( !m_constraintsInvolvedIn )
 741         m_constraintsInvolvedIn = new wxWindowList;
 742     if ( !m_constraintsInvolvedIn->Find(otherWin) )
 743         m_constraintsInvolvedIn->Append(otherWin);
 744 }
 745
 746 // REMOVE back-pointer to other windows we're involved with.
 747 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
 748 {
 749     if ( m_constraintsInvolvedIn )
 750         m_constraintsInvolvedIn->DeleteObject(otherWin);
 751 }
 752
 753 // Reset any constraints that mention this window
 754 void wxWindowBase::DeleteRelatedConstraints()
 755 {
 756     if ( m_constraintsInvolvedIn )
 757     {
 758         wxWindowList::Node *node = m_constraintsInvolvedIn->GetFirst();
 759         while (node)
 760         {
 761             wxWindow *win = node->GetData();
 762             wxLayoutConstraints *constr = win->GetConstraints();
 763
 764             // Reset any constraints involving this window
 765             if ( constr )
 766             {
 767                 constr->left.ResetIfWin(this);
 768                 constr->top.ResetIfWin(this);
 769                 constr->right.ResetIfWin(this);
 770                 constr->bottom.ResetIfWin(this);
 771                 constr->width.ResetIfWin(this);
 772                 constr->height.ResetIfWin(this);
 773                 constr->centreX.ResetIfWin(this);
 774                 constr->centreY.ResetIfWin(this);
 775             }
 776
 777             wxWindowList::Node *next = node->GetNext();
 778             delete node;
 779             node = next;
 780         }
 781
 782         delete m_constraintsInvolvedIn;
 783         m_constraintsInvolvedIn = (wxWindowList *) NULL;
 784     }
 785 }
 786
 787 void wxWindowBase::SetSizer(wxSizer *sizer)
 788 {
 789     m_windowSizer = sizer;
 790     if ( sizer )
 791         sizer->SetSizerParent(this);
 792 }
 793
 794 bool wxWindowBase::Layout()
 795 {
 796     if ( GetConstraints() )
 797     {
 798         int w, h;
 799         GetClientSize(&w, &h);
 800         GetConstraints()->width.SetValue(w);
 801         GetConstraints()->height.SetValue(h);
 802     }
 803
 804     // If top level (one sizer), evaluate the sizer's constraints.
 805     if ( GetSizer() )
 806     {
 807         int noChanges;
 808         GetSizer()->ResetConstraints();   // Mark all constraints as unevaluated
 809         GetSizer()->LayoutPhase1(&noChanges);
 810         GetSizer()->LayoutPhase2(&noChanges);
 811         GetSizer()->SetConstraintSizes(); // Recursively set the real window sizes
 812         return TRUE;
 813     }
 814     else
 815     {
 816         // Otherwise, evaluate child constraints
 817         ResetConstraints();   // Mark all constraints as unevaluated
 818         DoPhase(1);           // Just one phase need if no sizers involved
 819         DoPhase(2);
 820         SetConstraintSizes(); // Recursively set the real window sizes
 821     }
 822     return TRUE;
 823 }
 824
 825
 826 // Do a phase of evaluating constraints: the default behaviour. wxSizers may
 827 // do a similar thing, but also impose their own 'constraints' and order the
 828 // evaluation differently.
 829 bool wxWindowBase::LayoutPhase1(int *noChanges)
 830 {
 831     wxLayoutConstraints *constr = GetConstraints();
 832     if ( constr )
 833     {
 834         return constr->SatisfyConstraints(this, noChanges);
 835     }
 836     else
 837         return TRUE;
 838 }
 839
 840 bool wxWindowBase::LayoutPhase2(int *noChanges)
 841 {
 842     *noChanges = 0;
 843
 844     // Layout children
 845     DoPhase(1);
 846     DoPhase(2);
 847     return TRUE;
 848 }
 849
 850 // Do a phase of evaluating child constraints
 851 bool wxWindowBase::DoPhase(int phase)
 852 {
 853     int noIterations = 0;
 854     int maxIterations = 500;
 855     int noChanges = 1;
 856     int noFailures = 0;
 857     wxWindowList succeeded;
 858     while ((noChanges > 0) && (noIterations < maxIterations))
 859     {
 860         noChanges = 0;
 861         noFailures = 0;
 862         wxWindowList::Node *node = GetChildren().GetFirst();
 863         while (node)
 864         {
 865             wxWindow *child = node->GetData();
 866             if ( !child->IsKindOf(CLASSINFO(wxFrame)) && !child->IsKindOf(CLASSINFO(wxDialog)) )
 867             {
 868                 wxLayoutConstraints *constr = child->GetConstraints();
 869                 if ( constr )
 870                 {
 871                     if ( !succeeded.Find(child) )
 872                     {
 873                         int tempNoChanges = 0;
 874                         bool success = ( (phase == 1) ? child->LayoutPhase1(&tempNoChanges) : child->LayoutPhase2(&tempNoChanges) ) ;
 875                         noChanges += tempNoChanges;
 876                         if ( success )
 877                         {
 878                             succeeded.Append(child);
 879                         }
 880                     }
 881                 }
 882             }
 883             node = node->GetNext();
 884         }
 885
 886         noIterations++;
 887     }
 888
 889     return TRUE;
 890 }
 891
 892 void wxWindowBase::ResetConstraints()
 893 {
 894     wxLayoutConstraints *constr = GetConstraints();
 895     if ( constr )
 896     {
 897         constr->left.SetDone(FALSE);
 898         constr->top.SetDone(FALSE);
 899         constr->right.SetDone(FALSE);
 900         constr->bottom.SetDone(FALSE);
 901         constr->width.SetDone(FALSE);
 902         constr->height.SetDone(FALSE);
 903         constr->centreX.SetDone(FALSE);
 904         constr->centreY.SetDone(FALSE);
 905     }
 906     wxWindowList::Node *node = GetChildren().GetFirst();
 907     while (node)
 908     {
 909         wxWindow *win = node->GetData();
 910         if ( !win->IsKindOf(CLASSINFO(wxFrame)) && !win->IsKindOf(CLASSINFO(wxDialog)) )
 911             win->ResetConstraints();
 912         node = node->GetNext();
 913     }
 914 }
 915
 916 // Need to distinguish between setting the 'fake' size for windows and sizers,
 917 // and setting the real values.
 918 void wxWindowBase::SetConstraintSizes(bool recurse)
 919 {
 920     wxLayoutConstraints *constr = GetConstraints();
 921     if ( constr && constr->left.GetDone() && constr->right.GetDone( ) &&
 922             constr->width.GetDone() && constr->height.GetDone())
 923     {
 924         int x = constr->left.GetValue();
 925         int y = constr->top.GetValue();
 926         int w = constr->width.GetValue();
 927         int h = constr->height.GetValue();
 928
 929         // If we don't want to resize this window, just move it...
 930         if ( (constr->width.GetRelationship() != wxAsIs ) ||
 931                 (constr->height.GetRelationship() != wxAsIs))
 932         {
 933             // Calls Layout() recursively. AAAGH. How can we stop that.
 934             // Simply take Layout() out of non-top level OnSizes.
 935             SizerSetSize(x, y, w, h);
 936         }
 937         else
 938         {
 939             SizerMove(x, y);
 940         }
 941     }
 942     else if ( constr )
 943     {
 944         wxChar *windowClass = GetClassInfo()->GetClassName();
 945
 946         wxString winName;
 947         if ( GetName() == _T("") )
 948             winName = _T("unnamed");
 949         else
 950             winName = GetName();
 951         wxLogDebug( _T("Constraint(s) not satisfied for window of type %s, name %s:\n"),
 952                 (const wxChar *)windowClass,
 953                 (const wxChar *)winName);
 954         if ( !constr->left.GetDone()) wxLogDebug( _T("  unsatisfied 'left' constraint.\n")  );
 955         if ( !constr->right.GetDone()) wxLogDebug( _T("  unsatisfied 'right' constraint.\n")  );
 956         if ( !constr->width.GetDone()) wxLogDebug( _T("  unsatisfied 'width' constraint.\n")  );
 957         if ( !constr->height.GetDone())  wxLogDebug( _T("  unsatisfied 'height' constraint.\n")  );
 958         wxLogDebug( _T("Please check constraints: try adding AsIs() constraints.\n") );
 959     }
 960
 961     if ( recurse )
 962     {
 963         wxWindowList::Node *node = GetChildren().GetFirst();
 964         while (node)
 965         {
 966             wxWindow *win = node->GetData();
 967             if ( !win->IsKindOf(CLASSINFO(wxFrame)) && !win->IsKindOf(CLASSINFO(wxDialog)) )
 968                 win->SetConstraintSizes();
 969             node = node->GetNext();
 970         }
 971     }
 972 }
 973
 974 // This assumes that all sizers are 'on' the same window, i.e. the parent of
 975 // this window.
 976 void wxWindowBase::TransformSizerToActual(int *x, int *y) const
 977 {
 978     if ( !m_sizerParent || m_sizerParent->IsKindOf(CLASSINFO(wxDialog) ) ||
 979             m_sizerParent->IsKindOf(CLASSINFO(wxFrame)) )
 980         return;
 981
 982     int xp, yp;
 983     m_sizerParent->GetPosition(&xp, &yp);
 984     m_sizerParent->TransformSizerToActual(&xp, &yp);
 985     *x += xp;
 986     *y += yp;
 987 }
 988
 989 void wxWindowBase::SizerSetSize(int x, int y, int w, int h)
 990 {
 991     int xx = x;
 992     int yy = y;
 993     TransformSizerToActual(&xx, &yy);
 994     SetSize(xx, yy, w, h);
 995 }
 996
 997 void wxWindowBase::SizerMove(int x, int y)
 998 {
 999     int xx = x;
1000     int yy = y;
1001     TransformSizerToActual(&xx, &yy);
1002     Move(xx, yy);
1003 }
1004
1005 // Only set the size/position of the constraint (if any)
1006 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
1007 {
1008     wxLayoutConstraints *constr = GetConstraints();
1009     if ( constr )
1010     {
1011         if ( x != -1 )
1012         {
1013             constr->left.SetValue(x);
1014             constr->left.SetDone(TRUE);
1015         }
1016         if ( y != -1 )
1017         {
1018             constr->top.SetValue(y);
1019             constr->top.SetDone(TRUE);
1020         }
1021         if ( w != -1 )
1022         {
1023             constr->width.SetValue(w);
1024             constr->width.SetDone(TRUE);
1025         }
1026         if ( h != -1 )
1027         {
1028             constr->height.SetValue(h);
1029             constr->height.SetDone(TRUE);
1030         }
1031     }
1032 }
1033
1034 void wxWindowBase::MoveConstraint(int x, int y)
1035 {
1036     wxLayoutConstraints *constr = GetConstraints();
1037     if ( constr )
1038     {
1039         if ( x != -1 )
1040         {
1041             constr->left.SetValue(x);
1042             constr->left.SetDone(TRUE);
1043         }
1044         if ( y != -1 )
1045         {
1046             constr->top.SetValue(y);
1047             constr->top.SetDone(TRUE);
1048         }
1049     }
1050 }
1051
1052 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
1053 {
1054     wxLayoutConstraints *constr = GetConstraints();
1055     if ( constr )
1056     {
1057         *w = constr->width.GetValue();
1058         *h = constr->height.GetValue();
1059     }
1060     else
1061         GetSize(w, h);
1062 }
1063
1064 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
1065 {
1066     wxLayoutConstraints *constr = GetConstraints();
1067     if ( constr )
1068     {
1069         *w = constr->width.GetValue();
1070         *h = constr->height.GetValue();
1071     }
1072     else
1073         GetClientSize(w, h);
1074 }
1075
1076 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
1077 {
1078     wxLayoutConstraints *constr = GetConstraints();
1079     if ( constr )
1080     {
1081         *x = constr->left.GetValue();
1082         *y = constr->top.GetValue();
1083     }
1084     else
1085         GetPosition(x, y);
1086 }
1087
1088 #endif // wxUSE_CONSTRAINTS
1089
1090 // ----------------------------------------------------------------------------
1091 // do Update UI processing for child controls
1092 // ----------------------------------------------------------------------------
1093
1094 // TODO: should this be implemented for the child window rather
1095 // than the parent? Then you can override it e.g. for wxCheckBox
1096 // to do the Right Thing rather than having to assume a fixed number
1097 // of control classes.
1098 void wxWindowBase::UpdateWindowUI()
1099 {
1100     wxWindowID id = GetId();
1101     if ( id > 0 )
1102     {
1103         wxUpdateUIEvent event(id);
1104         event.m_eventObject = this;
1105
1106         if ( GetEventHandler()->ProcessEvent(event) )
1107         {
1108             if ( event.GetSetEnabled() )
1109                 Enable(event.GetEnabled());
1110
1111             if ( event.GetSetText() && IsKindOf(CLASSINFO(wxControl)) )
1112                 ((wxControl*)this)->SetLabel(event.GetText());
1113
1114             if ( IsKindOf(CLASSINFO(wxCheckBox)) )
1115             {
1116                 if ( event.GetSetChecked() )
1117                     ((wxCheckBox *)this)->SetValue(event.GetChecked());
1118             }
1119             // TODO No radio buttons in wxGTK yet
1120 #ifndef __WXGTK__
1121             else if ( IsKindOf(CLASSINFO(wxRadioButton)) )
1122             {
1123                 if ( event.GetSetChecked() )
1124                     ((wxRadioButton *) this)->SetValue(event.GetChecked());
1125             }
1126 #endif // !wxGTK
1127         }
1128     }
1129 }
1130
1131 // ----------------------------------------------------------------------------
1132 // dialog units translations
1133 // ----------------------------------------------------------------------------
1134
1135 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
1136 {
1137     int charWidth = GetCharWidth();
1138     int charHeight = GetCharHeight();
1139     wxPoint pt2;
1140     pt2.x = (int) ((pt.x * 4) / charWidth) ;
1141     pt2.y = (int) ((pt.y * 8) / charHeight) ;
1142
1143     return pt2;
1144 }
1145
1146 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
1147 {
1148     int charWidth = GetCharWidth();
1149     int charHeight = GetCharHeight();
1150     wxPoint pt2;
1151     pt2.x = (int) ((pt.x * charWidth) / 4) ;
1152     pt2.y = (int) ((pt.y * charHeight) / 8) ;
1153
1154     return pt2;
1155 }
1156
1157 // ----------------------------------------------------------------------------
1158 // event handlers
1159 // ----------------------------------------------------------------------------
1160
1161 // propagate the colour change event to the subwindows
1162 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
1163 {
1164     wxWindowList::Node *node = GetChildren().GetFirst();
1165     while ( node )
1166     {
1167         // Only propagate to non-top-level windows
1168         wxWindow *win = node->GetData();
1169         if ( !win->IsTopLevel() )
1170         {
1171             wxSysColourChangedEvent event2;
1172             event.m_eventObject = win;
1173             win->GetEventHandler()->ProcessEvent(event2);
1174         }
1175
1176         node = node->GetNext();
1177     }
1178 }
1179
1180 // the default action is to populate dialog with data when it's created
1181 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
1182 {
1183     TransferDataToWindow();
1184 }
1185
1186 // ----------------------------------------------------------------------------
1187 // list classes implementation
1188 // ----------------------------------------------------------------------------
1189
1190 void wxWindowListNode::DeleteData()
1191 {
1192     delete (wxWindow *)GetData();
1193 }
1194