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     #include "wx/sizer.h"
  47 #endif // wxUSE_CONSTRAINTS
  48
  49 #if wxUSE_DRAG_AND_DROP
  50     #include "wx/dnd.h"
  51 #endif // wxUSE_DRAG_AND_DROP
  52
  53 #if wxUSE_TOOLTIPS
  54     #include "wx/tooltip.h"
  55 #endif // wxUSE_TOOLTIPS
  56
  57 #if wxUSE_CARET
  58     #include "wx/caret.h"
  59 #endif // wxUSE_CARET
  60
  61 // ----------------------------------------------------------------------------
  62 // static data
  63 // ----------------------------------------------------------------------------
  64
  65 int wxWindowBase::ms_lastControlId = -200;
  66
  67 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  68
  69 // ----------------------------------------------------------------------------
  70 // event table
  71 // ----------------------------------------------------------------------------
  72
  73 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  74     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  75     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  76 END_EVENT_TABLE()
  77
  78 // ============================================================================
  79 // implementation of the common functionality of the wxWindow class
  80 // ============================================================================
  81
  82 // ----------------------------------------------------------------------------
  83 // initialization
  84 // ----------------------------------------------------------------------------
  85
  86 // the default initialization
  87 void wxWindowBase::InitBase()
  88 {
  89     // no window yet, no parent nor children
  90     m_parent = (wxWindow *)NULL;
  91     m_windowId = -1;
  92     m_children.DeleteContents( FALSE ); // don't auto delete node data
  93
  94     // no constraints on the minimal window size
  95     m_minWidth =
  96     m_minHeight =
  97     m_maxWidth =
  98     m_maxHeight = -1;
  99
 100     // window is created enabled but it's not visible yet
 101     m_isShown = FALSE;
 102     m_isEnabled = TRUE;
 103
 104     // no client data (yet)
 105     m_clientData = NULL;
 106     m_clientDataType = ClientData_None;
 107
 108     // the default event handler is just this window
 109     m_eventHandler = this;
 110
 111 #if wxUSE_VALIDATORS
 112     // no validator
 113     m_windowValidator = (wxValidator *) NULL;
 114 #endif // wxUSE_VALIDATORS
 115
 116     // use the system default colours
 117     wxSystemSettings settings;
 118
 119     m_backgroundColour = settings.GetSystemColour(wxSYS_COLOUR_BTNFACE);
 120     m_foregroundColour = *wxBLACK;  // TODO take this from sys settings too?
 121     m_font = *wxSWISS_FONT;         //      and this?
 122
 123     // no style bits
 124     m_windowStyle = 0;
 125
 126     // an optimization for the event processing: checking this flag is much
 127     // faster than using IsKindOf(CLASSINFO(wxWindow))
 128     m_isWindow = TRUE;
 129
 130 #if wxUSE_CONSTRAINTS
 131     // no constraints whatsoever
 132     m_constraints = (wxLayoutConstraints *) NULL;
 133     m_constraintsInvolvedIn = (wxWindowList *) NULL;
 134     m_windowSizer = (wxSizer *) NULL;
 135     m_autoLayout = FALSE;
 136 #endif // wxUSE_CONSTRAINTS
 137
 138 #if wxUSE_DRAG_AND_DROP
 139     m_dropTarget = (wxDropTarget *)NULL;
 140 #endif // wxUSE_DRAG_AND_DROP
 141
 142 #if wxUSE_TOOLTIPS
 143     m_tooltip = (wxToolTip *)NULL;
 144 #endif // wxUSE_TOOLTIPS
 145
 146 #if wxUSE_CARET
 147     m_caret = (wxCaret *)NULL;
 148 #endif // wxUSE_CARET
 149 }
 150
 151 // common part of window creation process
 152 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 153                               wxWindowID id,
 154                               const wxPoint& WXUNUSED(pos),
 155                               const wxSize& WXUNUSED(size),
 156                               long style,
 157                               const wxValidator& validator,
 158                               const wxString& name)
 159 {
 160     // m_isWindow is set to TRUE in wxWindowBase::Init() as well as many other
 161     // member variables - check that it has been called (will catch the case
 162     // when a new ctor is added which doesn't call InitWindow)
 163     wxASSERT_MSG( m_isWindow, T("Init() must have been called before!") );
 164
 165     // generate a new id if the user doesn't care about it
 166     m_windowId = id == -1 ? NewControlId() : id;
 167
 168     SetName(name);
 169     SetWindowStyleFlag(style);
 170     SetParent(parent);
 171     SetValidator(validator);
 172
 173     return TRUE;
 174 }
 175
 176 // ----------------------------------------------------------------------------
 177 // destruction
 178 // ----------------------------------------------------------------------------
 179
 180 // common clean up
 181 wxWindowBase::~wxWindowBase()
 182 {
 183     // FIXME if these 2 cases result from programming errors in the user code
 184     //       we should probably assert here instead of silently fixing them
 185
 186     // Just in case the window has been Closed, but we're then deleting
 187     // immediately: don't leave dangling pointers.
 188     wxPendingDelete.DeleteObject(this);
 189
 190     // Just in case we've loaded a top-level window via LoadNativeDialog but
 191     // we weren't a dialog class
 192     wxTopLevelWindows.DeleteObject(this);
 193
 194     wxASSERT_MSG( GetChildren().GetCount() == 0, T("children not destroyed") );
 195
 196     // make sure that there are no dangling pointers left pointing to us
 197     wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
 198     if ( panel )
 199     {
 200         if ( panel->GetLastFocus() == this )
 201         {
 202             panel->SetLastFocus((wxWindow *)NULL);
 203         }
 204     }
 205
 206 #if wxUSE_CARET
 207     if ( m_caret )
 208         delete m_caret;
 209 #endif // wxUSE_CARET
 210
 211 #if wxUSE_VALIDATORS
 212     if ( m_windowValidator )
 213         delete m_windowValidator;
 214 #endif // wxUSE_VALIDATORS
 215
 216     // we only delete object data, not untyped
 217     if ( m_clientDataType == ClientData_Object )
 218         delete m_clientObject;
 219
 220 #if wxUSE_CONSTRAINTS
 221     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 222     // at deleted windows as they delete themselves.
 223     DeleteRelatedConstraints();
 224
 225     if ( m_constraints )
 226     {
 227         // This removes any dangling pointers to this window in other windows'
 228         // constraintsInvolvedIn lists.
 229         UnsetConstraints(m_constraints);
 230         delete m_constraints;
 231         m_constraints = NULL;
 232     }
 233
 234     if ( m_windowSizer )
 235         delete m_windowSizer;
 236
 237 #endif // wxUSE_CONSTRAINTS
 238
 239 #if wxUSE_DRAG_AND_DROP
 240     if ( m_dropTarget )
 241         delete m_dropTarget;
 242 #endif // wxUSE_DRAG_AND_DROP
 243
 244 #if wxUSE_TOOLTIPS
 245     if ( m_tooltip )
 246         delete m_tooltip;
 247 #endif // wxUSE_TOOLTIPS
 248 }
 249
 250 bool wxWindowBase::Destroy()
 251 {
 252     delete this;
 253
 254     return TRUE;
 255 }
 256
 257 bool wxWindowBase::Close(bool force)
 258 {
 259     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 260     event.SetEventObject(this);
 261 #if WXWIN_COMPATIBILITY
 262     event.SetForce(force);
 263 #endif // WXWIN_COMPATIBILITY
 264     event.SetCanVeto(!force);
 265
 266     // return FALSE if window wasn't closed because the application vetoed the
 267     // close event
 268     return GetEventHandler()->ProcessEvent(event) && !event.GetVeto();
 269 }
 270
 271 bool wxWindowBase::DestroyChildren()
 272 {
 273     wxWindowList::Node *node;
 274     for ( ;; )
 275     {
 276         // we iterate until the list becomes empty
 277         node = GetChildren().GetFirst();
 278         if ( !node )
 279             break;
 280
 281         wxWindow *child = node->GetData();
 282
 283         wxASSERT_MSG( child, T("children list contains empty nodes") );
 284
 285         delete child;
 286
 287         wxASSERT_MSG( !GetChildren().Find(child),
 288                       T("child didn't remove itself using RemoveChild()") );
 289     }
 290
 291     return TRUE;
 292 }
 293
 294 // ----------------------------------------------------------------------------
 295 // centre/fit the window
 296 // ----------------------------------------------------------------------------
 297
 298 // centre the window with respect to its parent in either (or both) directions
 299 void wxWindowBase::Centre(int direction)
 300 {
 301     int widthParent, heightParent;
 302
 303     wxWindow *parent = GetParent();
 304     if ( !parent )
 305     {
 306         // no other choice
 307         direction |= wxCENTRE_ON_SCREEN;
 308     }
 309
 310     if ( direction & wxCENTRE_ON_SCREEN )
 311     {
 312         // centre with respect to the whole screen
 313         wxDisplaySize(&widthParent, &heightParent);
 314     }
 315     else
 316     {
 317         // centre inside the parents rectangle
 318         parent->GetClientSize(&widthParent, &heightParent);
 319     }
 320
 321     int width, height;
 322     GetSize(&width, &height);
 323
 324     int xNew = -1,
 325         yNew = -1;
 326
 327     if ( direction & wxHORIZONTAL )
 328         xNew = (widthParent - width)/2;
 329
 330     if ( direction & wxVERTICAL )
 331         yNew = (heightParent - height)/2;
 332
 333     // controls are always centered on their parent because it doesn't make
 334     // sense to centre them on the screen
 335     if ( !(direction & wxCENTRE_ON_SCREEN) || wxDynamicCast(this, wxControl) )
 336     {
 337         // theo nly chance to get this is to have a wxControl without parent
 338         wxCHECK_RET( parent, T("a control must have a parent") );
 339
 340         // adjust to the parents client area origin
 341         wxPoint posParent = parent->ClientToScreen(wxPoint(0, 0));
 342
 343         xNew += posParent.x;
 344         yNew += posParent.y;
 345     }
 346
 347     Move(xNew, yNew);
 348 }
 349
 350 // fits the window around the children
 351 void wxWindowBase::Fit()
 352 {
 353     int maxX = 0,
 354         maxY = 0;
 355
 356     for ( wxWindowList::Node *node = GetChildren().GetFirst();
 357           node;
 358           node = node->GetNext() )
 359     {
 360         wxWindow *win = node->GetData();
 361         if ( win->IsTopLevel() )
 362         {
 363             // dialogs and frames lie in different top level windows - don't
 364             // deal with them here
 365             continue;
 366         }
 367
 368         int wx, wy, ww, wh;
 369         win->GetPosition(&wx, &wy);
 370         win->GetSize(&ww, &wh);
 371         if ( wx + ww > maxX )
 372             maxX = wx + ww;
 373         if ( wy + wh > maxY )
 374             maxY = wy + wh;
 375     }
 376
 377     // leave a margin
 378     SetClientSize(maxX + 7, maxY + 14);
 379 }
 380
 381 // set the min/max size of the window
 382
 383 void wxWindowBase::SetSizeHints(int minW, int minH,
 384                                 int maxW, int maxH,
 385                                 int WXUNUSED(incW), int WXUNUSED(incH))
 386 {
 387     m_minWidth = minW;
 388     m_maxWidth = maxW;
 389     m_minHeight = minH;
 390     m_maxHeight = maxH;
 391 }
 392
 393 // ----------------------------------------------------------------------------
 394 // show/hide/enable/disable the window
 395 // ----------------------------------------------------------------------------
 396
 397 bool wxWindowBase::Show(bool show)
 398 {
 399     if ( show != m_isShown )
 400     {
 401         m_isShown = show;
 402
 403         return TRUE;
 404     }
 405     else
 406     {
 407         return FALSE;
 408     }
 409 }
 410
 411 bool wxWindowBase::Enable(bool enable)
 412 {
 413     if ( enable != m_isEnabled )
 414     {
 415         m_isEnabled = enable;
 416
 417         return TRUE;
 418     }
 419     else
 420     {
 421         return FALSE;
 422     }
 423 }
 424 // ----------------------------------------------------------------------------
 425 // RTTI
 426 // ----------------------------------------------------------------------------
 427
 428 bool wxWindowBase::IsTopLevel() const
 429 {
 430     return wxDynamicCast(this, wxFrame) || wxDynamicCast(this, wxDialog);
 431 }
 432
 433 // ----------------------------------------------------------------------------
 434 // reparenting the window
 435 // ----------------------------------------------------------------------------
 436
 437 void wxWindowBase::AddChild(wxWindowBase *child)
 438 {
 439     wxCHECK_RET( child, T("can't add a NULL child") );
 440
 441     GetChildren().Append(child);
 442     child->SetParent(this);
 443 }
 444
 445 void wxWindowBase::RemoveChild(wxWindowBase *child)
 446 {
 447     wxCHECK_RET( child, T("can't remove a NULL child") );
 448
 449     GetChildren().DeleteObject(child);
 450     child->SetParent((wxWindow *)NULL);
 451 }
 452
 453 bool wxWindowBase::Reparent(wxWindowBase *newParent)
 454 {
 455     wxWindow *oldParent = GetParent();
 456     if ( newParent == oldParent )
 457     {
 458         // nothing done
 459         return FALSE;
 460     }
 461
 462     // unlink this window from the existing parent.
 463     if ( oldParent )
 464     {
 465         oldParent->RemoveChild(this);
 466     }
 467     else
 468     {
 469         wxTopLevelWindows.DeleteObject(this);
 470     }
 471
 472     // add it to the new one
 473     if ( newParent )
 474     {
 475         newParent->AddChild(this);
 476     }
 477     else
 478     {
 479         wxTopLevelWindows.Append(this);
 480     }
 481
 482     return TRUE;
 483 }
 484
 485 // ----------------------------------------------------------------------------
 486 // event handler stuff
 487 // ----------------------------------------------------------------------------
 488
 489 void wxWindowBase::PushEventHandler(wxEvtHandler *handler)
 490 {
 491     handler->SetNextHandler(GetEventHandler());
 492     SetEventHandler(handler);
 493 }
 494
 495 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
 496 {
 497     wxEvtHandler *handlerA = GetEventHandler();
 498     if ( handlerA )
 499     {
 500         wxEvtHandler *handlerB = handlerA->GetNextHandler();
 501         handlerA->SetNextHandler((wxEvtHandler *)NULL);
 502         SetEventHandler(handlerB);
 503         if ( deleteHandler )
 504         {
 505             delete handlerA;
 506             handlerA = (wxEvtHandler *)NULL;
 507         }
 508     }
 509
 510     return handlerA;
 511 }
 512
 513 // ----------------------------------------------------------------------------
 514 // cursors, fonts &c
 515 // ----------------------------------------------------------------------------
 516
 517 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
 518 {
 519     if ( !colour.Ok() || (colour == m_backgroundColour) )
 520         return FALSE;
 521
 522     m_backgroundColour = colour;
 523
 524     return TRUE;
 525 }
 526
 527 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
 528 {
 529     if ( !colour.Ok() || (colour == m_foregroundColour) )
 530         return FALSE;
 531
 532     m_foregroundColour = colour;
 533
 534     return TRUE;
 535 }
 536
 537 bool wxWindowBase::SetCursor(const wxCursor& cursor)
 538 {
 539     // don't try to set invalid cursor, always fall back to the default
 540     const wxCursor& cursorOk = cursor.Ok() ? cursor : *wxSTANDARD_CURSOR;
 541
 542     if ( (wxCursor&)cursorOk == m_cursor )
 543     {
 544         // no change
 545         return FALSE;
 546     }
 547
 548     m_cursor = cursorOk;
 549
 550     return TRUE;
 551 }
 552
 553 bool wxWindowBase::SetFont(const wxFont& font)
 554 {
 555     // don't try to set invalid font, always fall back to the default
 556     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 557
 558     if ( (wxFont&)fontOk == m_font )
 559     {
 560         // no change
 561         return FALSE;
 562     }
 563
 564     m_font = fontOk;
 565
 566     return TRUE;
 567 }
 568
 569 #if wxUSE_CARET
 570 void wxWindowBase::SetCaret(wxCaret *caret)
 571 {
 572     if ( m_caret )
 573     {
 574         delete m_caret;
 575     }
 576
 577     m_caret = caret;
 578
 579     if ( m_caret )
 580     {
 581         wxASSERT_MSG( m_caret->GetWindow() == this,
 582                       T("caret should be created associated to this window") );
 583     }
 584 }
 585 #endif // wxUSE_CARET
 586
 587 #if wxUSE_VALIDATORS
 588 // ----------------------------------------------------------------------------
 589 // validators
 590 // ----------------------------------------------------------------------------
 591
 592 void wxWindowBase::SetValidator(const wxValidator& validator)
 593 {
 594     if ( m_windowValidator )
 595         delete m_windowValidator;
 596
 597     m_windowValidator = (wxValidator *)validator.Clone();
 598
 599     if ( m_windowValidator )
 600         m_windowValidator->SetWindow(this) ;
 601 }
 602 #endif // wxUSE_VALIDATORS
 603
 604 // ----------------------------------------------------------------------------
 605 // update region testing
 606 // ----------------------------------------------------------------------------
 607
 608 bool wxWindowBase::IsExposed(int x, int y) const
 609 {
 610     return m_updateRegion.Contains(x, y) != wxOutRegion;
 611 }
 612
 613 bool wxWindowBase::IsExposed(int x, int y, int w, int h) const
 614 {
 615     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
 616 }
 617
 618 // ----------------------------------------------------------------------------
 619 // find window by id or name
 620 // ----------------------------------------------------------------------------
 621
 622 wxWindow *wxWindowBase::FindWindow( long id )
 623 {
 624     if ( id == m_windowId )
 625         return (wxWindow *)this;
 626
 627     wxWindowBase *res = (wxWindow *)NULL;
 628     wxWindowList::Node *node;
 629     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 630     {
 631         wxWindowBase *child = node->GetData();
 632         res = child->FindWindow( id );
 633     }
 634
 635     return (wxWindow *)res;
 636 }
 637
 638 wxWindow *wxWindowBase::FindWindow( const wxString& name )
 639 {
 640     if ( name == m_windowName )
 641         return (wxWindow *)this;
 642
 643     wxWindowBase *res = (wxWindow *)NULL;
 644     wxWindowList::Node *node;
 645     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 646     {
 647         wxWindow *child = node->GetData();
 648         res = child->FindWindow(name);
 649     }
 650
 651     return (wxWindow *)res;
 652 }
 653
 654 // ----------------------------------------------------------------------------
 655 // dialog oriented functions
 656 // ----------------------------------------------------------------------------
 657
 658 void wxWindowBase::MakeModal(bool modal)
 659 {
 660     // Disable all other windows
 661     if ( IsTopLevel() )
 662     {
 663         wxWindowList::Node *node = wxTopLevelWindows.GetFirst();
 664         while (node)
 665         {
 666             wxWindow *win = node->GetData();
 667             if (win != this)
 668                 win->Enable(!modal);
 669
 670             node = node->GetNext();
 671         }
 672     }
 673 }
 674
 675 bool wxWindowBase::Validate()
 676 {
 677 #if wxUSE_VALIDATORS
 678     wxWindowList::Node *node;
 679     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 680     {
 681         wxWindowBase *child = node->GetData();
 682         wxValidator *validator = child->GetValidator();
 683         if ( validator && !validator->Validate((wxWindow *)this) )
 684         {
 685             return FALSE;
 686         }
 687     }
 688 #endif // wxUSE_VALIDATORS
 689
 690     return TRUE;
 691 }
 692
 693 bool wxWindowBase::TransferDataToWindow()
 694 {
 695 #if wxUSE_VALIDATORS
 696     wxWindowList::Node *node;
 697     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 698     {
 699         wxWindowBase *child = node->GetData();
 700         wxValidator *validator = child->GetValidator();
 701         if ( validator && !validator->TransferToWindow() )
 702         {
 703             wxLog *log = wxLog::GetActiveTarget();
 704             if ( log )
 705             {
 706                 wxLogWarning(_("Could not transfer data to window"));
 707                 log->Flush();
 708             }
 709
 710             return FALSE;
 711         }
 712     }
 713 #endif // wxUSE_VALIDATORS
 714
 715     return TRUE;
 716 }
 717
 718 bool wxWindowBase::TransferDataFromWindow()
 719 {
 720 #if wxUSE_VALIDATORS
 721     wxWindowList::Node *node;
 722     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 723     {
 724         wxWindow *child = node->GetData();
 725         if ( child->GetValidator() &&
 726              !child->GetValidator()->TransferFromWindow() )
 727         {
 728             return FALSE;
 729         }
 730     }
 731 #endif // wxUSE_VALIDATORS
 732
 733     return TRUE;
 734 }
 735
 736 void wxWindowBase::InitDialog()
 737 {
 738     wxInitDialogEvent event(GetId());
 739     event.SetEventObject( this );
 740     GetEventHandler()->ProcessEvent(event);
 741 }
 742
 743 // ----------------------------------------------------------------------------
 744 // tooltips
 745 // ----------------------------------------------------------------------------
 746
 747 #if wxUSE_TOOLTIPS
 748
 749 void wxWindowBase::SetToolTip( const wxString &tip )
 750 {
 751     // don't create the new tooltip if we already have one
 752     if ( m_tooltip )
 753     {
 754         m_tooltip->SetTip( tip );
 755     }
 756     else
 757     {
 758         SetToolTip( new wxToolTip( tip ) );
 759     }
 760
 761     // setting empty tooltip text does not remove the tooltip any more - use
 762     // SetToolTip((wxToolTip *)NULL) for this
 763 }
 764
 765 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
 766 {
 767     if ( m_tooltip )
 768         delete m_tooltip;
 769
 770     m_tooltip = tooltip;
 771 }
 772
 773 #endif // wxUSE_TOOLTIPS
 774
 775 // ----------------------------------------------------------------------------
 776 // constraints and sizers
 777 // ----------------------------------------------------------------------------
 778
 779 #if wxUSE_CONSTRAINTS
 780
 781 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
 782 {
 783     if ( m_constraints )
 784     {
 785         UnsetConstraints(m_constraints);
 786         delete m_constraints;
 787     }
 788     m_constraints = constraints;
 789     if ( m_constraints )
 790     {
 791         // Make sure other windows know they're part of a 'meaningful relationship'
 792         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
 793             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
 794         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
 795             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
 796         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
 797             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
 798         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
 799             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
 800         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
 801             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
 802         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
 803             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
 804         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
 805             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
 806         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
 807             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
 808     }
 809 }
 810
 811 // This removes any dangling pointers to this window in other windows'
 812 // constraintsInvolvedIn lists.
 813 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
 814 {
 815     if ( c )
 816     {
 817         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 818             c->left.GetOtherWindow()->RemoveConstraintReference(this);
 819         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 820             c->top.GetOtherWindow()->RemoveConstraintReference(this);
 821         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
 822             c->right.GetOtherWindow()->RemoveConstraintReference(this);
 823         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
 824             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
 825         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
 826             c->width.GetOtherWindow()->RemoveConstraintReference(this);
 827         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
 828             c->height.GetOtherWindow()->RemoveConstraintReference(this);
 829         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
 830             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
 831         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
 832             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
 833     }
 834 }
 835
 836 // Back-pointer to other windows we're involved with, so if we delete this
 837 // window, we must delete any constraints we're involved with.
 838 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
 839 {
 840     if ( !m_constraintsInvolvedIn )
 841         m_constraintsInvolvedIn = new wxWindowList;
 842     if ( !m_constraintsInvolvedIn->Find(otherWin) )
 843         m_constraintsInvolvedIn->Append(otherWin);
 844 }
 845
 846 // REMOVE back-pointer to other windows we're involved with.
 847 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
 848 {
 849     if ( m_constraintsInvolvedIn )
 850         m_constraintsInvolvedIn->DeleteObject(otherWin);
 851 }
 852
 853 // Reset any constraints that mention this window
 854 void wxWindowBase::DeleteRelatedConstraints()
 855 {
 856     if ( m_constraintsInvolvedIn )
 857     {
 858         wxWindowList::Node *node = m_constraintsInvolvedIn->GetFirst();
 859         while (node)
 860         {
 861             wxWindow *win = node->GetData();
 862             wxLayoutConstraints *constr = win->GetConstraints();
 863
 864             // Reset any constraints involving this window
 865             if ( constr )
 866             {
 867                 constr->left.ResetIfWin(this);
 868                 constr->top.ResetIfWin(this);
 869                 constr->right.ResetIfWin(this);
 870                 constr->bottom.ResetIfWin(this);
 871                 constr->width.ResetIfWin(this);
 872                 constr->height.ResetIfWin(this);
 873                 constr->centreX.ResetIfWin(this);
 874                 constr->centreY.ResetIfWin(this);
 875             }
 876
 877             wxWindowList::Node *next = node->GetNext();
 878             delete node;
 879             node = next;
 880         }
 881
 882         delete m_constraintsInvolvedIn;
 883         m_constraintsInvolvedIn = (wxWindowList *) NULL;
 884     }
 885 }
 886
 887 void wxWindowBase::SetSizer(wxSizer *sizer)
 888 {
 889     if (m_windowSizer) delete m_windowSizer;
 890
 891     m_windowSizer = sizer;
 892 }
 893
 894 bool wxWindowBase::Layout()
 895 {
 896     int w, h;
 897     GetClientSize(&w, &h);
 898
 899     // If there is a sizer, use it instead of the constraints
 900     if ( GetSizer() )
 901     {
 902         GetSizer()->SetDimension( 0, 0, w, h );
 903         return TRUE;
 904     }
 905
 906     if ( GetConstraints() )
 907     {
 908         GetConstraints()->width.SetValue(w);
 909         GetConstraints()->height.SetValue(h);
 910     }
 911
 912     // Evaluate child constraints
 913     ResetConstraints();   // Mark all constraints as unevaluated
 914     DoPhase(1);           // Just one phase need if no sizers involved
 915     DoPhase(2);
 916     SetConstraintSizes(); // Recursively set the real window sizes
 917
 918     return TRUE;
 919 }
 920
 921
 922 // Do a phase of evaluating constraints: the default behaviour. wxSizers may
 923 // do a similar thing, but also impose their own 'constraints' and order the
 924 // evaluation differently.
 925 bool wxWindowBase::LayoutPhase1(int *noChanges)
 926 {
 927     wxLayoutConstraints *constr = GetConstraints();
 928     if ( constr )
 929     {
 930         return constr->SatisfyConstraints(this, noChanges);
 931     }
 932     else
 933         return TRUE;
 934 }
 935
 936 bool wxWindowBase::LayoutPhase2(int *noChanges)
 937 {
 938     *noChanges = 0;
 939
 940     // Layout children
 941     DoPhase(1);
 942     DoPhase(2);
 943     return TRUE;
 944 }
 945
 946 // Do a phase of evaluating child constraints
 947 bool wxWindowBase::DoPhase(int phase)
 948 {
 949     int noIterations = 0;
 950     int maxIterations = 500;
 951     int noChanges = 1;
 952     int noFailures = 0;
 953     wxWindowList succeeded;
 954     while ((noChanges > 0) && (noIterations < maxIterations))
 955     {
 956         noChanges = 0;
 957         noFailures = 0;
 958         wxWindowList::Node *node = GetChildren().GetFirst();
 959         while (node)
 960         {
 961             wxWindow *child = node->GetData();
 962             if ( !child->IsTopLevel() )
 963             {
 964                 wxLayoutConstraints *constr = child->GetConstraints();
 965                 if ( constr )
 966                 {
 967                     if ( !succeeded.Find(child) )
 968                     {
 969                         int tempNoChanges = 0;
 970                         bool success = ( (phase == 1) ? child->LayoutPhase1(&tempNoChanges) : child->LayoutPhase2(&tempNoChanges) ) ;
 971                         noChanges += tempNoChanges;
 972                         if ( success )
 973                         {
 974                             succeeded.Append(child);
 975                         }
 976                     }
 977                 }
 978             }
 979             node = node->GetNext();
 980         }
 981
 982         noIterations++;
 983     }
 984
 985     return TRUE;
 986 }
 987
 988 void wxWindowBase::ResetConstraints()
 989 {
 990     wxLayoutConstraints *constr = GetConstraints();
 991     if ( constr )
 992     {
 993         constr->left.SetDone(FALSE);
 994         constr->top.SetDone(FALSE);
 995         constr->right.SetDone(FALSE);
 996         constr->bottom.SetDone(FALSE);
 997         constr->width.SetDone(FALSE);
 998         constr->height.SetDone(FALSE);
 999         constr->centreX.SetDone(FALSE);
1000         constr->centreY.SetDone(FALSE);
1001     }
1002     wxWindowList::Node *node = GetChildren().GetFirst();
1003     while (node)
1004     {
1005         wxWindow *win = node->GetData();
1006         if ( !win->IsTopLevel() )
1007             win->ResetConstraints();
1008         node = node->GetNext();
1009     }
1010 }
1011
1012 // Need to distinguish between setting the 'fake' size for windows and sizers,
1013 // and setting the real values.
1014 void wxWindowBase::SetConstraintSizes(bool recurse)
1015 {
1016     wxLayoutConstraints *constr = GetConstraints();
1017     if ( constr && constr->left.GetDone() && constr->right.GetDone( ) &&
1018             constr->width.GetDone() && constr->height.GetDone())
1019     {
1020         int x = constr->left.GetValue();
1021         int y = constr->top.GetValue();
1022         int w = constr->width.GetValue();
1023         int h = constr->height.GetValue();
1024
1025         if ( (constr->width.GetRelationship() != wxAsIs ) ||
1026              (constr->height.GetRelationship() != wxAsIs) )
1027         {
1028             SetSize(x, y, w, h);
1029         }
1030         else
1031         {
1032             // If we don't want to resize this window, just move it...
1033             Move(x, y);
1034         }
1035     }
1036     else if ( constr )
1037     {
1038         wxChar *windowClass = GetClassInfo()->GetClassName();
1039
1040         wxString winName;
1041         if ( GetName() == T("") )
1042             winName = T("unnamed");
1043         else
1044             winName = GetName();
1045         wxLogDebug( T("Constraint(s) not satisfied for window of type %s, name %s:\n"),
1046                 (const wxChar *)windowClass,
1047                 (const wxChar *)winName);
1048         if ( !constr->left.GetDone()) wxLogDebug( T("  unsatisfied 'left' constraint.\n")  );
1049         if ( !constr->right.GetDone()) wxLogDebug( T("  unsatisfied 'right' constraint.\n")  );
1050         if ( !constr->width.GetDone()) wxLogDebug( T("  unsatisfied 'width' constraint.\n")  );
1051         if ( !constr->height.GetDone())  wxLogDebug( T("  unsatisfied 'height' constraint.\n")  );
1052         wxLogDebug( T("Please check constraints: try adding AsIs() constraints.\n") );
1053     }
1054
1055     if ( recurse )
1056     {
1057         wxWindowList::Node *node = GetChildren().GetFirst();
1058         while (node)
1059         {
1060             wxWindow *win = node->GetData();
1061             if ( !win->IsTopLevel() )
1062                 win->SetConstraintSizes();
1063             node = node->GetNext();
1064         }
1065     }
1066 }
1067
1068 // Only set the size/position of the constraint (if any)
1069 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
1070 {
1071     wxLayoutConstraints *constr = GetConstraints();
1072     if ( constr )
1073     {
1074         if ( x != -1 )
1075         {
1076             constr->left.SetValue(x);
1077             constr->left.SetDone(TRUE);
1078         }
1079         if ( y != -1 )
1080         {
1081             constr->top.SetValue(y);
1082             constr->top.SetDone(TRUE);
1083         }
1084         if ( w != -1 )
1085         {
1086             constr->width.SetValue(w);
1087             constr->width.SetDone(TRUE);
1088         }
1089         if ( h != -1 )
1090         {
1091             constr->height.SetValue(h);
1092             constr->height.SetDone(TRUE);
1093         }
1094     }
1095 }
1096
1097 void wxWindowBase::MoveConstraint(int x, int y)
1098 {
1099     wxLayoutConstraints *constr = GetConstraints();
1100     if ( constr )
1101     {
1102         if ( x != -1 )
1103         {
1104             constr->left.SetValue(x);
1105             constr->left.SetDone(TRUE);
1106         }
1107         if ( y != -1 )
1108         {
1109             constr->top.SetValue(y);
1110             constr->top.SetDone(TRUE);
1111         }
1112     }
1113 }
1114
1115 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
1116 {
1117     wxLayoutConstraints *constr = GetConstraints();
1118     if ( constr )
1119     {
1120         *w = constr->width.GetValue();
1121         *h = constr->height.GetValue();
1122     }
1123     else
1124         GetSize(w, h);
1125 }
1126
1127 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
1128 {
1129     wxLayoutConstraints *constr = GetConstraints();
1130     if ( constr )
1131     {
1132         *w = constr->width.GetValue();
1133         *h = constr->height.GetValue();
1134     }
1135     else
1136         GetClientSize(w, h);
1137 }
1138
1139 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
1140 {
1141     wxLayoutConstraints *constr = GetConstraints();
1142     if ( constr )
1143     {
1144         *x = constr->left.GetValue();
1145         *y = constr->top.GetValue();
1146     }
1147     else
1148         GetPosition(x, y);
1149 }
1150
1151 #endif // wxUSE_CONSTRAINTS
1152
1153 // ----------------------------------------------------------------------------
1154 // do Update UI processing for child controls
1155 // ----------------------------------------------------------------------------
1156
1157 // TODO: should this be implemented for the child window rather
1158 // than the parent? Then you can override it e.g. for wxCheckBox
1159 // to do the Right Thing rather than having to assume a fixed number
1160 // of control classes.
1161 void wxWindowBase::UpdateWindowUI()
1162 {
1163     wxWindowID id = GetId();
1164     if ( id > 0 )
1165     {
1166         wxUpdateUIEvent event(id);
1167         event.m_eventObject = this;
1168
1169         if ( GetEventHandler()->ProcessEvent(event) )
1170         {
1171             if ( event.GetSetEnabled() )
1172                 Enable(event.GetEnabled());
1173
1174             if ( event.GetSetText() )
1175             {
1176                 wxControl *control = wxDynamicCast(this, wxControl);
1177                 if ( control )
1178                     control->SetLabel(event.GetText());
1179             }
1180
1181 #if wxUSE_CHECKBOX
1182             wxCheckBox *checkbox = wxDynamicCast(this, wxCheckBox);
1183             if ( checkbox )
1184             {
1185                 if ( event.GetSetChecked() )
1186                     checkbox->SetValue(event.GetChecked());
1187             }
1188 #endif // wxUSE_CHECKBOX
1189
1190 #if wxUSE_RADIOBUTTON
1191             wxRadioButton *radiobtn = wxDynamicCast(this, wxRadioButton);
1192             if ( radiobtn )
1193             {
1194                 if ( event.GetSetChecked() )
1195                     radiobtn->SetValue(event.GetChecked());
1196             }
1197 #endif // wxUSE_RADIOBUTTON
1198         }
1199     }
1200 }
1201
1202 // ----------------------------------------------------------------------------
1203 // dialog units translations
1204 // ----------------------------------------------------------------------------
1205
1206 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
1207 {
1208     int charWidth = GetCharWidth();
1209     int charHeight = GetCharHeight();
1210     wxPoint pt2(-1, -1);
1211     if (pt.x != -1)
1212         pt2.x = (int) ((pt.x * 4) / charWidth) ;
1213     if (pt.y != -1)
1214         pt2.y = (int) ((pt.y * 8) / charHeight) ;
1215
1216     return pt2;
1217 }
1218
1219 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
1220 {
1221     int charWidth = GetCharWidth();
1222     int charHeight = GetCharHeight();
1223     wxPoint pt2(-1, -1);
1224     if (pt.x != -1)
1225         pt2.x = (int) ((pt.x * charWidth) / 4) ;
1226     if (pt.y != -1)
1227         pt2.y = (int) ((pt.y * charHeight) / 8) ;
1228
1229     return pt2;
1230 }
1231
1232 // ----------------------------------------------------------------------------
1233 // client data
1234 // ----------------------------------------------------------------------------
1235
1236 void wxWindowBase::DoSetClientObject( wxClientData *data )
1237 {
1238     wxASSERT_MSG( m_clientDataType != ClientData_Void,
1239                   T("can't have both object and void client data") );
1240
1241     if ( m_clientObject )
1242         delete m_clientObject;
1243
1244     m_clientObject = data;
1245     m_clientDataType = ClientData_Object;
1246 }
1247
1248 wxClientData *wxWindowBase::DoGetClientObject() const
1249 {
1250     wxASSERT_MSG( m_clientDataType == ClientData_Object,
1251                   T("this window doesn't have object client data") );
1252
1253     return m_clientObject;
1254 }
1255
1256 void wxWindowBase::DoSetClientData( void *data )
1257 {
1258     wxASSERT_MSG( m_clientDataType != ClientData_Object,
1259                   T("can't have both object and void client data") );
1260
1261     m_clientData = data;
1262     m_clientDataType = ClientData_Void;
1263 }
1264
1265 void *wxWindowBase::DoGetClientData() const
1266 {
1267     wxASSERT_MSG( m_clientDataType == ClientData_Void,
1268                   T("this window doesn't have void client data") );
1269
1270     return m_clientData;
1271 }
1272
1273 // ----------------------------------------------------------------------------
1274 // event handlers
1275 // ----------------------------------------------------------------------------
1276
1277 // propagate the colour change event to the subwindows
1278 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
1279 {
1280     wxWindowList::Node *node = GetChildren().GetFirst();
1281     while ( node )
1282     {
1283         // Only propagate to non-top-level windows
1284         wxWindow *win = node->GetData();
1285         if ( !win->IsTopLevel() )
1286         {
1287             wxSysColourChangedEvent event2;
1288             event.m_eventObject = win;
1289             win->GetEventHandler()->ProcessEvent(event2);
1290         }
1291
1292         node = node->GetNext();
1293     }
1294 }
1295
1296 // the default action is to populate dialog with data when it's created
1297 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
1298 {
1299     TransferDataToWindow();
1300 }
1301
1302 // ----------------------------------------------------------------------------
1303 // list classes implementation
1304 // ----------------------------------------------------------------------------
1305
1306 void wxWindowListNode::DeleteData()
1307 {
1308     delete (wxWindow *)GetData();
1309 }
1310