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/textctrl.h"
  41     #include "wx/settings.h"
  42     #include "wx/dialog.h"
  43     #include "wx/msgdlg.h"
  44 #endif //WX_PRECOMP
  45
  46 #if wxUSE_CONSTRAINTS
  47     #include "wx/layout.h"
  48     #include "wx/sizer.h"
  49 #endif // wxUSE_CONSTRAINTS
  50
  51 #if wxUSE_DRAG_AND_DROP
  52     #include "wx/dnd.h"
  53 #endif // wxUSE_DRAG_AND_DROP
  54
  55 #if wxUSE_TOOLTIPS
  56     #include "wx/tooltip.h"
  57 #endif // wxUSE_TOOLTIPS
  58
  59 #if wxUSE_CARET
  60     #include "wx/caret.h"
  61 #endif // wxUSE_CARET
  62
  63 // ----------------------------------------------------------------------------
  64 // static data
  65 // ----------------------------------------------------------------------------
  66
  67 int wxWindowBase::ms_lastControlId = -200;
  68
  69 IMPLEMENT_ABSTRACT_CLASS(wxWindowBase, wxEvtHandler)
  70
  71 // ----------------------------------------------------------------------------
  72 // event table
  73 // ----------------------------------------------------------------------------
  74
  75 BEGIN_EVENT_TABLE(wxWindowBase, wxEvtHandler)
  76     EVT_SYS_COLOUR_CHANGED(wxWindowBase::OnSysColourChanged)
  77     EVT_INIT_DIALOG(wxWindowBase::OnInitDialog)
  78     EVT_MIDDLE_DOWN(wxWindowBase::OnMiddleClick)
  79 END_EVENT_TABLE()
  80
  81 // ============================================================================
  82 // implementation of the common functionality of the wxWindow class
  83 // ============================================================================
  84
  85 // ----------------------------------------------------------------------------
  86 // initialization
  87 // ----------------------------------------------------------------------------
  88
  89 // the default initialization
  90 void wxWindowBase::InitBase()
  91 {
  92     // no window yet, no parent nor children
  93     m_parent = (wxWindow *)NULL;
  94     m_windowId = -1;
  95     m_children.DeleteContents( FALSE ); // don't auto delete node data
  96
  97     // no constraints on the minimal window size
  98     m_minWidth =
  99     m_minHeight =
 100     m_maxWidth =
 101     m_maxHeight = -1;
 102
 103     // window is created enabled but it's not visible yet
 104     m_isShown = FALSE;
 105     m_isEnabled = TRUE;
 106
 107     // no client data (yet)
 108     m_clientData = NULL;
 109     m_clientDataType = ClientData_None;
 110
 111     // the default event handler is just this window
 112     m_eventHandler = this;
 113
 114 #if wxUSE_VALIDATORS
 115     // no validator
 116     m_windowValidator = (wxValidator *) NULL;
 117 #endif // wxUSE_VALIDATORS
 118
 119     // use the system default colours
 120     wxSystemSettings settings;
 121
 122     m_backgroundColour = settings.GetSystemColour(wxSYS_COLOUR_BTNFACE);
 123     // m_foregroundColour = *wxBLACK;  // TODO take this from sys settings too?
 124     m_foregroundColour = wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOWTEXT);
 125
 126 #if !defined(__WXMAC__) && !defined(__WXGTK__)
 127     m_font = *wxSWISS_FONT;         //      and this?
 128 #else
 129     m_font = settings.GetSystemFont(wxSYS_DEFAULT_GUI_FONT);
 130 #endif
 131
 132     // no style bits
 133     m_exStyle =
 134     m_windowStyle = 0;
 135
 136     // an optimization for the event processing: checking this flag is much
 137     // faster than using IsKindOf(CLASSINFO(wxWindow))
 138     m_isWindow = TRUE;
 139
 140 #if wxUSE_CONSTRAINTS
 141     // no constraints whatsoever
 142     m_constraints = (wxLayoutConstraints *) NULL;
 143     m_constraintsInvolvedIn = (wxWindowList *) NULL;
 144     m_windowSizer = (wxSizer *) NULL;
 145     m_autoLayout = FALSE;
 146 #endif // wxUSE_CONSTRAINTS
 147
 148 #if wxUSE_DRAG_AND_DROP
 149     m_dropTarget = (wxDropTarget *)NULL;
 150 #endif // wxUSE_DRAG_AND_DROP
 151
 152 #if wxUSE_TOOLTIPS
 153     m_tooltip = (wxToolTip *)NULL;
 154 #endif // wxUSE_TOOLTIPS
 155
 156 #if wxUSE_CARET
 157     m_caret = (wxCaret *)NULL;
 158 #endif // wxUSE_CARET
 159 }
 160
 161 // common part of window creation process
 162 bool wxWindowBase::CreateBase(wxWindowBase *parent,
 163                               wxWindowID id,
 164                               const wxPoint& WXUNUSED(pos),
 165                               const wxSize& WXUNUSED(size),
 166                               long style,
 167                               const wxValidator& validator,
 168                               const wxString& name)
 169 {
 170     // m_isWindow is set to TRUE in wxWindowBase::Init() as well as many other
 171     // member variables - check that it has been called (will catch the case
 172     // when a new ctor is added which doesn't call InitWindow)
 173     wxASSERT_MSG( m_isWindow, wxT("Init() must have been called before!") );
 174
 175     // generate a new id if the user doesn't care about it
 176     m_windowId = id == -1 ? NewControlId() : id;
 177
 178     SetName(name);
 179
 180     // if the parent window has wxWS_EX_VALIDATE_RECURSIVELY set, we want to
 181     // have it too - like this it's possible to set it only in the top level
 182     // dialog/frame and all children will inherit it by defult
 183     if ( parent && (parent->GetWindowStyle() & wxWS_EX_VALIDATE_RECURSIVELY) )
 184     {
 185         style |= wxWS_EX_VALIDATE_RECURSIVELY;
 186     }
 187
 188     SetWindowStyleFlag(style);
 189     SetParent(parent);
 190
 191 #if wxUSE_VALIDATORS
 192     SetValidator(validator);
 193 #endif // wxUSE_VALIDATORS
 194
 195     return TRUE;
 196 }
 197
 198 // ----------------------------------------------------------------------------
 199 // destruction
 200 // ----------------------------------------------------------------------------
 201
 202 // common clean up
 203 wxWindowBase::~wxWindowBase()
 204 {
 205     // FIXME if these 2 cases result from programming errors in the user code
 206     //       we should probably assert here instead of silently fixing them
 207
 208     // Just in case the window has been Closed, but we're then deleting
 209     // immediately: don't leave dangling pointers.
 210     wxPendingDelete.DeleteObject(this);
 211
 212     // Just in case we've loaded a top-level window via LoadNativeDialog but
 213     // we weren't a dialog class
 214     wxTopLevelWindows.DeleteObject(this);
 215
 216     wxASSERT_MSG( GetChildren().GetCount() == 0, wxT("children not destroyed") );
 217
 218     // make sure that there are no dangling pointers left pointing to us
 219     wxPanel *panel = wxDynamicCast(GetParent(), wxPanel);
 220     if ( panel )
 221     {
 222         if ( panel->GetLastFocus() == this )
 223         {
 224             panel->SetLastFocus((wxWindow *)NULL);
 225         }
 226     }
 227
 228 #if wxUSE_CARET
 229     if ( m_caret )
 230         delete m_caret;
 231 #endif // wxUSE_CARET
 232
 233 #if wxUSE_VALIDATORS
 234     if ( m_windowValidator )
 235         delete m_windowValidator;
 236 #endif // wxUSE_VALIDATORS
 237
 238     // we only delete object data, not untyped
 239     if ( m_clientDataType == ClientData_Object )
 240         delete m_clientObject;
 241
 242 #if wxUSE_CONSTRAINTS
 243     // Have to delete constraints/sizer FIRST otherwise sizers may try to look
 244     // at deleted windows as they delete themselves.
 245     DeleteRelatedConstraints();
 246
 247     if ( m_constraints )
 248     {
 249         // This removes any dangling pointers to this window in other windows'
 250         // constraintsInvolvedIn lists.
 251         UnsetConstraints(m_constraints);
 252         delete m_constraints;
 253         m_constraints = NULL;
 254     }
 255
 256     if ( m_windowSizer )
 257         delete m_windowSizer;
 258
 259 #endif // wxUSE_CONSTRAINTS
 260
 261 #if wxUSE_DRAG_AND_DROP
 262     if ( m_dropTarget )
 263         delete m_dropTarget;
 264 #endif // wxUSE_DRAG_AND_DROP
 265
 266 #if wxUSE_TOOLTIPS
 267     if ( m_tooltip )
 268         delete m_tooltip;
 269 #endif // wxUSE_TOOLTIPS
 270 }
 271
 272 bool wxWindowBase::Destroy()
 273 {
 274     delete this;
 275
 276     return TRUE;
 277 }
 278
 279 bool wxWindowBase::Close(bool force)
 280 {
 281     wxCloseEvent event(wxEVT_CLOSE_WINDOW, m_windowId);
 282     event.SetEventObject(this);
 283 #if WXWIN_COMPATIBILITY
 284     event.SetForce(force);
 285 #endif // WXWIN_COMPATIBILITY
 286     event.SetCanVeto(!force);
 287
 288     // return FALSE if window wasn't closed because the application vetoed the
 289     // close event
 290     return GetEventHandler()->ProcessEvent(event) && !event.GetVeto();
 291 }
 292
 293 bool wxWindowBase::DestroyChildren()
 294 {
 295     wxWindowList::Node *node;
 296     for ( ;; )
 297     {
 298         // we iterate until the list becomes empty
 299         node = GetChildren().GetFirst();
 300         if ( !node )
 301             break;
 302
 303         wxWindow *child = node->GetData();
 304
 305         wxASSERT_MSG( child, wxT("children list contains empty nodes") );
 306
 307         delete child;
 308
 309         wxASSERT_MSG( !GetChildren().Find(child),
 310                       wxT("child didn't remove itself using RemoveChild()") );
 311     }
 312
 313     return TRUE;
 314 }
 315
 316 // ----------------------------------------------------------------------------
 317 // size/position related methods
 318 // ----------------------------------------------------------------------------
 319
 320 // centre the window with respect to its parent in either (or both) directions
 321 void wxWindowBase::Centre(int direction)
 322 {
 323     int widthParent, heightParent;
 324
 325     wxWindow *parent = GetParent();
 326     if ( !parent )
 327     {
 328         // no other choice
 329         direction |= wxCENTRE_ON_SCREEN;
 330     }
 331
 332     if ( direction & wxCENTRE_ON_SCREEN )
 333     {
 334         // centre with respect to the whole screen
 335         wxDisplaySize(&widthParent, &heightParent);
 336     }
 337     else
 338     {
 339         // centre inside the parents rectangle
 340         parent->GetClientSize(&widthParent, &heightParent);
 341     }
 342
 343     int width, height;
 344     GetSize(&width, &height);
 345
 346     int xNew = -1,
 347         yNew = -1;
 348
 349     if ( direction & wxHORIZONTAL )
 350         xNew = (widthParent - width)/2;
 351
 352     if ( direction & wxVERTICAL )
 353         yNew = (heightParent - height)/2;
 354
 355     // controls are always centered on their parent because it doesn't make
 356     // sense to centre them on the screen
 357     if ( !(direction & wxCENTRE_ON_SCREEN) || wxDynamicCast(this, wxControl) )
 358     {
 359         // theo nly chance to get this is to have a wxControl without parent
 360         wxCHECK_RET( parent, wxT("a control must have a parent") );
 361
 362         // adjust to the parents client area origin
 363         wxPoint posParent = parent->ClientToScreen(wxPoint(0, 0));
 364
 365         xNew += posParent.x;
 366         yNew += posParent.y;
 367     }
 368
 369     // move the centre of this window to this position
 370     Move(xNew, yNew);
 371 }
 372
 373 // fits the window around the children
 374 void wxWindowBase::Fit()
 375 {
 376     if ( GetChildren().GetCount() > 0 )
 377     {
 378         SetClientSize(DoGetBestSize());
 379     }
 380     //else: do nothing if we have no children
 381 }
 382
 383 // return the size best suited for the current window
 384 wxSize wxWindowBase::DoGetBestSize() const
 385 {
 386     if ( GetChildren().GetCount() > 0 )
 387     {
 388         // our minimal acceptable size is such that all our windows fit inside
 389         int maxX = 0,
 390             maxY = 0;
 391
 392         for ( wxWindowList::Node *node = GetChildren().GetFirst();
 393               node;
 394               node = node->GetNext() )
 395         {
 396             wxWindow *win = node->GetData();
 397             if ( win->IsTopLevel() )
 398             {
 399                 // dialogs and frames lie in different top level windows -
 400                 // don't deal with them here
 401                 continue;
 402             }
 403
 404             int wx, wy, ww, wh;
 405             win->GetPosition(&wx, &wy);
 406             win->GetSize(&ww, &wh);
 407             if ( wx + ww > maxX )
 408                 maxX = wx + ww;
 409             if ( wy + wh > maxY )
 410                 maxY = wy + wh;
 411         }
 412
 413         // leave a margin
 414         return wxSize(maxX + 7, maxY + 14);
 415     }
 416     else
 417     {
 418         // for a generic window there is no natural best size - just use the
 419         // current one
 420         return GetSize();
 421     }
 422 }
 423
 424 // set the min/max size of the window
 425 void wxWindowBase::SetSizeHints(int minW, int minH,
 426                                 int maxW, int maxH,
 427                                 int WXUNUSED(incW), int WXUNUSED(incH))
 428 {
 429     m_minWidth = minW;
 430     m_maxWidth = maxW;
 431     m_minHeight = minH;
 432     m_maxHeight = maxH;
 433 }
 434
 435 // ----------------------------------------------------------------------------
 436 // show/hide/enable/disable the window
 437 // ----------------------------------------------------------------------------
 438
 439 bool wxWindowBase::Show(bool show)
 440 {
 441     if ( show != m_isShown )
 442     {
 443         m_isShown = show;
 444
 445         return TRUE;
 446     }
 447     else
 448     {
 449         return FALSE;
 450     }
 451 }
 452
 453 bool wxWindowBase::Enable(bool enable)
 454 {
 455     if ( enable != m_isEnabled )
 456     {
 457         m_isEnabled = enable;
 458
 459         return TRUE;
 460     }
 461     else
 462     {
 463         return FALSE;
 464     }
 465 }
 466 // ----------------------------------------------------------------------------
 467 // RTTI
 468 // ----------------------------------------------------------------------------
 469
 470 bool wxWindowBase::IsTopLevel() const
 471 {
 472     return FALSE;
 473 }
 474
 475 // ----------------------------------------------------------------------------
 476 // reparenting the window
 477 // ----------------------------------------------------------------------------
 478
 479 void wxWindowBase::AddChild(wxWindowBase *child)
 480 {
 481     wxCHECK_RET( child, wxT("can't add a NULL child") );
 482
 483     GetChildren().Append(child);
 484     child->SetParent(this);
 485 }
 486
 487 void wxWindowBase::RemoveChild(wxWindowBase *child)
 488 {
 489     wxCHECK_RET( child, wxT("can't remove a NULL child") );
 490
 491     GetChildren().DeleteObject(child);
 492     child->SetParent((wxWindow *)NULL);
 493 }
 494
 495 bool wxWindowBase::Reparent(wxWindowBase *newParent)
 496 {
 497     wxWindow *oldParent = GetParent();
 498     if ( newParent == oldParent )
 499     {
 500         // nothing done
 501         return FALSE;
 502     }
 503
 504     // unlink this window from the existing parent.
 505     if ( oldParent )
 506     {
 507         oldParent->RemoveChild(this);
 508     }
 509     else
 510     {
 511         wxTopLevelWindows.DeleteObject(this);
 512     }
 513
 514     // add it to the new one
 515     if ( newParent )
 516     {
 517         newParent->AddChild(this);
 518     }
 519     else
 520     {
 521         wxTopLevelWindows.Append(this);
 522     }
 523
 524     return TRUE;
 525 }
 526
 527 // ----------------------------------------------------------------------------
 528 // event handler stuff
 529 // ----------------------------------------------------------------------------
 530
 531 void wxWindowBase::PushEventHandler(wxEvtHandler *handler)
 532 {
 533     handler->SetNextHandler(GetEventHandler());
 534     SetEventHandler(handler);
 535 }
 536
 537 wxEvtHandler *wxWindowBase::PopEventHandler(bool deleteHandler)
 538 {
 539     wxEvtHandler *handlerA = GetEventHandler();
 540     if ( handlerA )
 541     {
 542         wxEvtHandler *handlerB = handlerA->GetNextHandler();
 543         handlerA->SetNextHandler((wxEvtHandler *)NULL);
 544         SetEventHandler(handlerB);
 545         if ( deleteHandler )
 546         {
 547             delete handlerA;
 548             handlerA = (wxEvtHandler *)NULL;
 549         }
 550     }
 551
 552     return handlerA;
 553 }
 554
 555 // ----------------------------------------------------------------------------
 556 // cursors, fonts &c
 557 // ----------------------------------------------------------------------------
 558
 559 bool wxWindowBase::SetBackgroundColour( const wxColour &colour )
 560 {
 561     if ( !colour.Ok() || (colour == m_backgroundColour) )
 562         return FALSE;
 563
 564     m_backgroundColour = colour;
 565
 566     return TRUE;
 567 }
 568
 569 bool wxWindowBase::SetForegroundColour( const wxColour &colour )
 570 {
 571     if ( !colour.Ok() || (colour == m_foregroundColour) )
 572         return FALSE;
 573
 574     m_foregroundColour = colour;
 575
 576     return TRUE;
 577 }
 578
 579 bool wxWindowBase::SetCursor(const wxCursor& cursor)
 580 {
 581     // don't try to set invalid cursor, always fall back to the default
 582     const wxCursor& cursorOk = cursor.Ok() ? cursor : *wxSTANDARD_CURSOR;
 583
 584     if ( (wxCursor&)cursorOk == m_cursor )
 585     {
 586         // no change
 587         return FALSE;
 588     }
 589
 590     m_cursor = cursorOk;
 591
 592     return TRUE;
 593 }
 594
 595 bool wxWindowBase::SetFont(const wxFont& font)
 596 {
 597     // don't try to set invalid font, always fall back to the default
 598     const wxFont& fontOk = font.Ok() ? font : *wxSWISS_FONT;
 599
 600     if ( (wxFont&)fontOk == m_font )
 601     {
 602         // no change
 603         return FALSE;
 604     }
 605
 606     m_font = fontOk;
 607
 608     return TRUE;
 609 }
 610
 611 #if wxUSE_CARET
 612 void wxWindowBase::SetCaret(wxCaret *caret)
 613 {
 614     if ( m_caret )
 615     {
 616         delete m_caret;
 617     }
 618
 619     m_caret = caret;
 620
 621     if ( m_caret )
 622     {
 623         wxASSERT_MSG( m_caret->GetWindow() == this,
 624                       wxT("caret should be created associated to this window") );
 625     }
 626 }
 627 #endif // wxUSE_CARET
 628
 629 #if wxUSE_VALIDATORS
 630 // ----------------------------------------------------------------------------
 631 // validators
 632 // ----------------------------------------------------------------------------
 633
 634 void wxWindowBase::SetValidator(const wxValidator& validator)
 635 {
 636     if ( m_windowValidator )
 637         delete m_windowValidator;
 638
 639     m_windowValidator = (wxValidator *)validator.Clone();
 640
 641     if ( m_windowValidator )
 642         m_windowValidator->SetWindow(this) ;
 643 }
 644 #endif // wxUSE_VALIDATORS
 645
 646 // ----------------------------------------------------------------------------
 647 // update region testing
 648 // ----------------------------------------------------------------------------
 649
 650 bool wxWindowBase::IsExposed(int x, int y) const
 651 {
 652     return m_updateRegion.Contains(x, y) != wxOutRegion;
 653 }
 654
 655 bool wxWindowBase::IsExposed(int x, int y, int w, int h) const
 656 {
 657     return m_updateRegion.Contains(x, y, w, h) != wxOutRegion;
 658 }
 659
 660 // ----------------------------------------------------------------------------
 661 // find window by id or name
 662 // ----------------------------------------------------------------------------
 663
 664 wxWindow *wxWindowBase::FindWindow( long id )
 665 {
 666     if ( id == m_windowId )
 667         return (wxWindow *)this;
 668
 669     wxWindowBase *res = (wxWindow *)NULL;
 670     wxWindowList::Node *node;
 671     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 672     {
 673         wxWindowBase *child = node->GetData();
 674         res = child->FindWindow( id );
 675     }
 676
 677     return (wxWindow *)res;
 678 }
 679
 680 wxWindow *wxWindowBase::FindWindow( const wxString& name )
 681 {
 682     if ( name == m_windowName )
 683         return (wxWindow *)this;
 684
 685     wxWindowBase *res = (wxWindow *)NULL;
 686     wxWindowList::Node *node;
 687     for ( node = m_children.GetFirst(); node && !res; node = node->GetNext() )
 688     {
 689         wxWindow *child = node->GetData();
 690         res = child->FindWindow(name);
 691     }
 692
 693     return (wxWindow *)res;
 694 }
 695
 696 // ----------------------------------------------------------------------------
 697 // dialog oriented functions
 698 // ----------------------------------------------------------------------------
 699
 700 void wxWindowBase::MakeModal(bool modal)
 701 {
 702     // Disable all other windows
 703     if ( IsTopLevel() )
 704     {
 705         wxWindowList::Node *node = wxTopLevelWindows.GetFirst();
 706         while (node)
 707         {
 708             wxWindow *win = node->GetData();
 709             if (win != this)
 710                 win->Enable(!modal);
 711
 712             node = node->GetNext();
 713         }
 714     }
 715 }
 716
 717 bool wxWindowBase::Validate()
 718 {
 719 #if wxUSE_VALIDATORS
 720     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
 721
 722     wxWindowList::Node *node;
 723     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 724     {
 725         wxWindowBase *child = node->GetData();
 726         wxValidator *validator = child->GetValidator();
 727         if ( validator && !validator->Validate((wxWindow *)this) )
 728         {
 729             return FALSE;
 730         }
 731
 732         if ( recurse && !child->Validate() )
 733         {
 734             return FALSE;
 735         }
 736     }
 737 #endif // wxUSE_VALIDATORS
 738
 739     return TRUE;
 740 }
 741
 742 bool wxWindowBase::TransferDataToWindow()
 743 {
 744 #if wxUSE_VALIDATORS
 745     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
 746
 747     wxWindowList::Node *node;
 748     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 749     {
 750         wxWindowBase *child = node->GetData();
 751         wxValidator *validator = child->GetValidator();
 752         if ( validator && !validator->TransferToWindow() )
 753         {
 754             wxLogWarning(_("Could not transfer data to window"));
 755             wxLog::FlushActive();
 756
 757             return FALSE;
 758         }
 759
 760         if ( recurse )
 761         {
 762             if ( !child->TransferDataToWindow() )
 763             {
 764                 // warning already given
 765                 return FALSE;
 766             }
 767         }
 768     }
 769 #endif // wxUSE_VALIDATORS
 770
 771     return TRUE;
 772 }
 773
 774 bool wxWindowBase::TransferDataFromWindow()
 775 {
 776 #if wxUSE_VALIDATORS
 777     bool recurse = (GetExtraStyle() & wxWS_EX_VALIDATE_RECURSIVELY) != 0;
 778
 779     wxWindowList::Node *node;
 780     for ( node = m_children.GetFirst(); node; node = node->GetNext() )
 781     {
 782         wxWindow *child = node->GetData();
 783         wxValidator *validator = child->GetValidator();
 784         if ( validator && !validator->TransferFromWindow() )
 785         {
 786             // nop warning here because the application is supposed to give
 787             // one itself - we don't know here what might have gone wrongly
 788
 789             return FALSE;
 790         }
 791
 792         if ( recurse )
 793         {
 794             if ( !child->TransferDataFromWindow() )
 795             {
 796                 // warning already given
 797                 return FALSE;
 798             }
 799         }
 800     }
 801 #endif // wxUSE_VALIDATORS
 802
 803     return TRUE;
 804 }
 805
 806 void wxWindowBase::InitDialog()
 807 {
 808     wxInitDialogEvent event(GetId());
 809     event.SetEventObject( this );
 810     GetEventHandler()->ProcessEvent(event);
 811 }
 812
 813 // ----------------------------------------------------------------------------
 814 // tooltips
 815 // ----------------------------------------------------------------------------
 816
 817 #if wxUSE_TOOLTIPS
 818
 819 void wxWindowBase::SetToolTip( const wxString &tip )
 820 {
 821     // don't create the new tooltip if we already have one
 822     if ( m_tooltip )
 823     {
 824         m_tooltip->SetTip( tip );
 825     }
 826     else
 827     {
 828         SetToolTip( new wxToolTip( tip ) );
 829     }
 830
 831     // setting empty tooltip text does not remove the tooltip any more - use
 832     // SetToolTip((wxToolTip *)NULL) for this
 833 }
 834
 835 void wxWindowBase::DoSetToolTip(wxToolTip *tooltip)
 836 {
 837     if ( m_tooltip )
 838         delete m_tooltip;
 839
 840     m_tooltip = tooltip;
 841 }
 842
 843 #endif // wxUSE_TOOLTIPS
 844
 845 // ----------------------------------------------------------------------------
 846 // constraints and sizers
 847 // ----------------------------------------------------------------------------
 848
 849 #if wxUSE_CONSTRAINTS
 850
 851 void wxWindowBase::SetConstraints( wxLayoutConstraints *constraints )
 852 {
 853     if ( m_constraints )
 854     {
 855         UnsetConstraints(m_constraints);
 856         delete m_constraints;
 857     }
 858     m_constraints = constraints;
 859     if ( m_constraints )
 860     {
 861         // Make sure other windows know they're part of a 'meaningful relationship'
 862         if ( m_constraints->left.GetOtherWindow() && (m_constraints->left.GetOtherWindow() != this) )
 863             m_constraints->left.GetOtherWindow()->AddConstraintReference(this);
 864         if ( m_constraints->top.GetOtherWindow() && (m_constraints->top.GetOtherWindow() != this) )
 865             m_constraints->top.GetOtherWindow()->AddConstraintReference(this);
 866         if ( m_constraints->right.GetOtherWindow() && (m_constraints->right.GetOtherWindow() != this) )
 867             m_constraints->right.GetOtherWindow()->AddConstraintReference(this);
 868         if ( m_constraints->bottom.GetOtherWindow() && (m_constraints->bottom.GetOtherWindow() != this) )
 869             m_constraints->bottom.GetOtherWindow()->AddConstraintReference(this);
 870         if ( m_constraints->width.GetOtherWindow() && (m_constraints->width.GetOtherWindow() != this) )
 871             m_constraints->width.GetOtherWindow()->AddConstraintReference(this);
 872         if ( m_constraints->height.GetOtherWindow() && (m_constraints->height.GetOtherWindow() != this) )
 873             m_constraints->height.GetOtherWindow()->AddConstraintReference(this);
 874         if ( m_constraints->centreX.GetOtherWindow() && (m_constraints->centreX.GetOtherWindow() != this) )
 875             m_constraints->centreX.GetOtherWindow()->AddConstraintReference(this);
 876         if ( m_constraints->centreY.GetOtherWindow() && (m_constraints->centreY.GetOtherWindow() != this) )
 877             m_constraints->centreY.GetOtherWindow()->AddConstraintReference(this);
 878     }
 879 }
 880
 881 // This removes any dangling pointers to this window in other windows'
 882 // constraintsInvolvedIn lists.
 883 void wxWindowBase::UnsetConstraints(wxLayoutConstraints *c)
 884 {
 885     if ( c )
 886     {
 887         if ( c->left.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 888             c->left.GetOtherWindow()->RemoveConstraintReference(this);
 889         if ( c->top.GetOtherWindow() && (c->top.GetOtherWindow() != this) )
 890             c->top.GetOtherWindow()->RemoveConstraintReference(this);
 891         if ( c->right.GetOtherWindow() && (c->right.GetOtherWindow() != this) )
 892             c->right.GetOtherWindow()->RemoveConstraintReference(this);
 893         if ( c->bottom.GetOtherWindow() && (c->bottom.GetOtherWindow() != this) )
 894             c->bottom.GetOtherWindow()->RemoveConstraintReference(this);
 895         if ( c->width.GetOtherWindow() && (c->width.GetOtherWindow() != this) )
 896             c->width.GetOtherWindow()->RemoveConstraintReference(this);
 897         if ( c->height.GetOtherWindow() && (c->height.GetOtherWindow() != this) )
 898             c->height.GetOtherWindow()->RemoveConstraintReference(this);
 899         if ( c->centreX.GetOtherWindow() && (c->centreX.GetOtherWindow() != this) )
 900             c->centreX.GetOtherWindow()->RemoveConstraintReference(this);
 901         if ( c->centreY.GetOtherWindow() && (c->centreY.GetOtherWindow() != this) )
 902             c->centreY.GetOtherWindow()->RemoveConstraintReference(this);
 903     }
 904 }
 905
 906 // Back-pointer to other windows we're involved with, so if we delete this
 907 // window, we must delete any constraints we're involved with.
 908 void wxWindowBase::AddConstraintReference(wxWindowBase *otherWin)
 909 {
 910     if ( !m_constraintsInvolvedIn )
 911         m_constraintsInvolvedIn = new wxWindowList;
 912     if ( !m_constraintsInvolvedIn->Find(otherWin) )
 913         m_constraintsInvolvedIn->Append(otherWin);
 914 }
 915
 916 // REMOVE back-pointer to other windows we're involved with.
 917 void wxWindowBase::RemoveConstraintReference(wxWindowBase *otherWin)
 918 {
 919     if ( m_constraintsInvolvedIn )
 920         m_constraintsInvolvedIn->DeleteObject(otherWin);
 921 }
 922
 923 // Reset any constraints that mention this window
 924 void wxWindowBase::DeleteRelatedConstraints()
 925 {
 926     if ( m_constraintsInvolvedIn )
 927     {
 928         wxWindowList::Node *node = m_constraintsInvolvedIn->GetFirst();
 929         while (node)
 930         {
 931             wxWindow *win = node->GetData();
 932             wxLayoutConstraints *constr = win->GetConstraints();
 933
 934             // Reset any constraints involving this window
 935             if ( constr )
 936             {
 937                 constr->left.ResetIfWin(this);
 938                 constr->top.ResetIfWin(this);
 939                 constr->right.ResetIfWin(this);
 940                 constr->bottom.ResetIfWin(this);
 941                 constr->width.ResetIfWin(this);
 942                 constr->height.ResetIfWin(this);
 943                 constr->centreX.ResetIfWin(this);
 944                 constr->centreY.ResetIfWin(this);
 945             }
 946
 947             wxWindowList::Node *next = node->GetNext();
 948             delete node;
 949             node = next;
 950         }
 951
 952         delete m_constraintsInvolvedIn;
 953         m_constraintsInvolvedIn = (wxWindowList *) NULL;
 954     }
 955 }
 956
 957 void wxWindowBase::SetSizer(wxSizer *sizer)
 958 {
 959     if (m_windowSizer) delete m_windowSizer;
 960
 961     m_windowSizer = sizer;
 962 }
 963
 964 bool wxWindowBase::Layout()
 965 {
 966     // If there is a sizer, use it instead of the constraints
 967     if ( GetSizer() )
 968     {
 969         int w, h;
 970         GetClientSize(&w, &h);
 971
 972         GetSizer()->SetDimension( 0, 0, w, h );
 973     }
 974     else
 975     {
 976         wxLayoutConstraints *constr = GetConstraints();
 977         bool wasOk = constr && constr->AreSatisfied();
 978
 979         ResetConstraints();   // Mark all constraints as unevaluated
 980
 981         // if we're a top level panel (i.e. our parent is frame/dialog), our
 982         // own constraints will never be satisfied any more unless we do it
 983         // here
 984         if ( wasOk )
 985         {
 986             int noChanges = 1;
 987             while ( noChanges > 0 )
 988             {
 989                 constr->SatisfyConstraints(this, &noChanges);
 990             }
 991         }
 992
 993         DoPhase(1);           // Layout children
 994         DoPhase(2);           // Layout grand children
 995         SetConstraintSizes(); // Recursively set the real window sizes
 996     }
 997
 998     return TRUE;
 999 }
1000
1001
1002 // Do a phase of evaluating constraints: the default behaviour. wxSizers may
1003 // do a similar thing, but also impose their own 'constraints' and order the
1004 // evaluation differently.
1005 bool wxWindowBase::LayoutPhase1(int *noChanges)
1006 {
1007     wxLayoutConstraints *constr = GetConstraints();
1008     if ( constr )
1009     {
1010         return constr->SatisfyConstraints(this, noChanges);
1011     }
1012     else
1013         return TRUE;
1014 }
1015
1016 bool wxWindowBase::LayoutPhase2(int *noChanges)
1017 {
1018     *noChanges = 0;
1019
1020     // Layout children
1021     DoPhase(1);
1022     DoPhase(2);
1023     return TRUE;
1024 }
1025
1026 // Do a phase of evaluating child constraints
1027 bool wxWindowBase::DoPhase(int phase)
1028 {
1029     int noIterations = 0;
1030     int maxIterations = 500;
1031     int noChanges = 1;
1032     int noFailures = 0;
1033     wxWindowList succeeded;
1034     while ((noChanges > 0) && (noIterations < maxIterations))
1035     {
1036         noChanges = 0;
1037         noFailures = 0;
1038         wxWindowList::Node *node = GetChildren().GetFirst();
1039         while (node)
1040         {
1041             wxWindow *child = node->GetData();
1042             if ( !child->IsTopLevel() )
1043             {
1044                 wxLayoutConstraints *constr = child->GetConstraints();
1045                 if ( constr )
1046                 {
1047                     if ( !succeeded.Find(child) )
1048                     {
1049                         int tempNoChanges = 0;
1050                         bool success = ( (phase == 1) ? child->LayoutPhase1(&tempNoChanges) : child->LayoutPhase2(&tempNoChanges) ) ;
1051                         noChanges += tempNoChanges;
1052                         if ( success )
1053                         {
1054                             succeeded.Append(child);
1055                         }
1056                     }
1057                 }
1058             }
1059             node = node->GetNext();
1060         }
1061
1062         noIterations++;
1063     }
1064
1065     return TRUE;
1066 }
1067
1068 void wxWindowBase::ResetConstraints()
1069 {
1070     wxLayoutConstraints *constr = GetConstraints();
1071     if ( constr )
1072     {
1073         constr->left.SetDone(FALSE);
1074         constr->top.SetDone(FALSE);
1075         constr->right.SetDone(FALSE);
1076         constr->bottom.SetDone(FALSE);
1077         constr->width.SetDone(FALSE);
1078         constr->height.SetDone(FALSE);
1079         constr->centreX.SetDone(FALSE);
1080         constr->centreY.SetDone(FALSE);
1081     }
1082
1083     wxWindowList::Node *node = GetChildren().GetFirst();
1084     while (node)
1085     {
1086         wxWindow *win = node->GetData();
1087         if ( !win->IsTopLevel() )
1088             win->ResetConstraints();
1089         node = node->GetNext();
1090     }
1091 }
1092
1093 // Need to distinguish between setting the 'fake' size for windows and sizers,
1094 // and setting the real values.
1095 void wxWindowBase::SetConstraintSizes(bool recurse)
1096 {
1097     wxLayoutConstraints *constr = GetConstraints();
1098     if ( constr && constr->AreSatisfied() )
1099     {
1100         int x = constr->left.GetValue();
1101         int y = constr->top.GetValue();
1102         int w = constr->width.GetValue();
1103         int h = constr->height.GetValue();
1104
1105         if ( (constr->width.GetRelationship() != wxAsIs ) ||
1106              (constr->height.GetRelationship() != wxAsIs) )
1107         {
1108             SetSize(x, y, w, h);
1109         }
1110         else
1111         {
1112             // If we don't want to resize this window, just move it...
1113             Move(x, y);
1114         }
1115     }
1116     else if ( constr )
1117     {
1118         wxLogDebug(wxT("Constraints not satisfied for %s named '%s'."),
1119                    GetClassInfo()->GetClassName(),
1120                    GetName().c_str());
1121     }
1122
1123     if ( recurse )
1124     {
1125         wxWindowList::Node *node = GetChildren().GetFirst();
1126         while (node)
1127         {
1128             wxWindow *win = node->GetData();
1129             if ( !win->IsTopLevel() )
1130                 win->SetConstraintSizes();
1131             node = node->GetNext();
1132         }
1133     }
1134 }
1135
1136 // Only set the size/position of the constraint (if any)
1137 void wxWindowBase::SetSizeConstraint(int x, int y, int w, int h)
1138 {
1139     wxLayoutConstraints *constr = GetConstraints();
1140     if ( constr )
1141     {
1142         if ( x != -1 )
1143         {
1144             constr->left.SetValue(x);
1145             constr->left.SetDone(TRUE);
1146         }
1147         if ( y != -1 )
1148         {
1149             constr->top.SetValue(y);
1150             constr->top.SetDone(TRUE);
1151         }
1152         if ( w != -1 )
1153         {
1154             constr->width.SetValue(w);
1155             constr->width.SetDone(TRUE);
1156         }
1157         if ( h != -1 )
1158         {
1159             constr->height.SetValue(h);
1160             constr->height.SetDone(TRUE);
1161         }
1162     }
1163 }
1164
1165 void wxWindowBase::MoveConstraint(int x, int y)
1166 {
1167     wxLayoutConstraints *constr = GetConstraints();
1168     if ( constr )
1169     {
1170         if ( x != -1 )
1171         {
1172             constr->left.SetValue(x);
1173             constr->left.SetDone(TRUE);
1174         }
1175         if ( y != -1 )
1176         {
1177             constr->top.SetValue(y);
1178             constr->top.SetDone(TRUE);
1179         }
1180     }
1181 }
1182
1183 void wxWindowBase::GetSizeConstraint(int *w, int *h) const
1184 {
1185     wxLayoutConstraints *constr = GetConstraints();
1186     if ( constr )
1187     {
1188         *w = constr->width.GetValue();
1189         *h = constr->height.GetValue();
1190     }
1191     else
1192         GetSize(w, h);
1193 }
1194
1195 void wxWindowBase::GetClientSizeConstraint(int *w, int *h) const
1196 {
1197     wxLayoutConstraints *constr = GetConstraints();
1198     if ( constr )
1199     {
1200         *w = constr->width.GetValue();
1201         *h = constr->height.GetValue();
1202     }
1203     else
1204         GetClientSize(w, h);
1205 }
1206
1207 void wxWindowBase::GetPositionConstraint(int *x, int *y) const
1208 {
1209     wxLayoutConstraints *constr = GetConstraints();
1210     if ( constr )
1211     {
1212         *x = constr->left.GetValue();
1213         *y = constr->top.GetValue();
1214     }
1215     else
1216         GetPosition(x, y);
1217 }
1218
1219 #endif // wxUSE_CONSTRAINTS
1220
1221 // ----------------------------------------------------------------------------
1222 // do Update UI processing for child controls
1223 // ----------------------------------------------------------------------------
1224
1225 // TODO: should this be implemented for the child window rather
1226 // than the parent? Then you can override it e.g. for wxCheckBox
1227 // to do the Right Thing rather than having to assume a fixed number
1228 // of control classes.
1229 void wxWindowBase::UpdateWindowUI()
1230 {
1231     wxUpdateUIEvent event(GetId());
1232     event.m_eventObject = this;
1233
1234     if ( GetEventHandler()->ProcessEvent(event) )
1235     {
1236         if ( event.GetSetEnabled() )
1237             Enable(event.GetEnabled());
1238
1239         if ( event.GetSetText() )
1240         {
1241             wxControl *control = wxDynamicCast(this, wxControl);
1242             if ( control )
1243             {
1244                 wxTextCtrl *text = wxDynamicCast(control, wxTextCtrl);
1245                 if ( text )
1246                     text->SetValue(event.GetText());
1247                 else
1248                     control->SetLabel(event.GetText());
1249             }
1250         }
1251
1252 #if wxUSE_CHECKBOX
1253         wxCheckBox *checkbox = wxDynamicCast(this, wxCheckBox);
1254         if ( checkbox )
1255         {
1256             if ( event.GetSetChecked() )
1257                 checkbox->SetValue(event.GetChecked());
1258         }
1259 #endif // wxUSE_CHECKBOX
1260
1261 #if wxUSE_RADIOBTN
1262         wxRadioButton *radiobtn = wxDynamicCast(this, wxRadioButton);
1263         if ( radiobtn )
1264         {
1265             if ( event.GetSetChecked() )
1266                 radiobtn->SetValue(event.GetChecked());
1267         }
1268 #endif // wxUSE_RADIOBTN
1269     }
1270 }
1271
1272 // ----------------------------------------------------------------------------
1273 // dialog units translations
1274 // ----------------------------------------------------------------------------
1275
1276 wxPoint wxWindowBase::ConvertPixelsToDialog(const wxPoint& pt)
1277 {
1278     int charWidth = GetCharWidth();
1279     int charHeight = GetCharHeight();
1280     wxPoint pt2(-1, -1);
1281     if (pt.x != -1)
1282         pt2.x = (int) ((pt.x * 4) / charWidth) ;
1283     if (pt.y != -1)
1284         pt2.y = (int) ((pt.y * 8) / charHeight) ;
1285
1286     return pt2;
1287 }
1288
1289 wxPoint wxWindowBase::ConvertDialogToPixels(const wxPoint& pt)
1290 {
1291     int charWidth = GetCharWidth();
1292     int charHeight = GetCharHeight();
1293     wxPoint pt2(-1, -1);
1294     if (pt.x != -1)
1295         pt2.x = (int) ((pt.x * charWidth) / 4) ;
1296     if (pt.y != -1)
1297         pt2.y = (int) ((pt.y * charHeight) / 8) ;
1298
1299     return pt2;
1300 }
1301
1302 // ----------------------------------------------------------------------------
1303 // client data
1304 // ----------------------------------------------------------------------------
1305
1306 void wxWindowBase::DoSetClientObject( wxClientData *data )
1307 {
1308     wxASSERT_MSG( m_clientDataType != ClientData_Void,
1309                   wxT("can't have both object and void client data") );
1310
1311     if ( m_clientObject )
1312         delete m_clientObject;
1313
1314     m_clientObject = data;
1315     m_clientDataType = ClientData_Object;
1316 }
1317
1318 wxClientData *wxWindowBase::DoGetClientObject() const
1319 {
1320     // it's not an error to call GetClientObject() on a window which doesn't
1321     // have client data at all - NULL will be returned
1322     wxASSERT_MSG( m_clientDataType != ClientData_Void,
1323                   wxT("this window doesn't have object client data") );
1324
1325     return m_clientObject;
1326 }
1327
1328 void wxWindowBase::DoSetClientData( void *data )
1329 {
1330     wxASSERT_MSG( m_clientDataType != ClientData_Object,
1331                   wxT("can't have both object and void client data") );
1332
1333     m_clientData = data;
1334     m_clientDataType = ClientData_Void;
1335 }
1336
1337 void *wxWindowBase::DoGetClientData() const
1338 {
1339     // it's not an error to call GetClientData() on a window which doesn't have
1340     // client data at all - NULL will be returned
1341     wxASSERT_MSG( m_clientDataType != ClientData_Object,
1342                   wxT("this window doesn't have void client data") );
1343
1344     return m_clientData;
1345 }
1346
1347 // ----------------------------------------------------------------------------
1348 // event handlers
1349 // ----------------------------------------------------------------------------
1350
1351 // propagate the colour change event to the subwindows
1352 void wxWindowBase::OnSysColourChanged(wxSysColourChangedEvent& event)
1353 {
1354     wxWindowList::Node *node = GetChildren().GetFirst();
1355     while ( node )
1356     {
1357         // Only propagate to non-top-level windows
1358         wxWindow *win = node->GetData();
1359         if ( !win->IsTopLevel() )
1360         {
1361             wxSysColourChangedEvent event2;
1362             event.m_eventObject = win;
1363             win->GetEventHandler()->ProcessEvent(event2);
1364         }
1365
1366         node = node->GetNext();
1367     }
1368 }
1369
1370 // the default action is to populate dialog with data when it's created
1371 void wxWindowBase::OnInitDialog( wxInitDialogEvent &WXUNUSED(event) )
1372 {
1373     TransferDataToWindow();
1374 }
1375
1376 // process Ctrl-Alt-mclick
1377 void wxWindowBase::OnMiddleClick( wxMouseEvent& event )
1378 {
1379     if ( event.ControlDown() && event.AltDown() )
1380     {
1381         // don't translate these strings
1382         wxString port;
1383         switch ( wxGetOsVersion() )
1384         {
1385             case wxMOTIF_X:     port = _T("Motif"); break;
1386             case wxMACINTOSH:   port = _T("Mac"); break;
1387             case wxBEOS:        port = _T("BeOS"); break;
1388             case wxGTK:
1389             case wxGTK_WIN32:
1390             case wxGTK_OS2:
1391             case wxGTK_BEOS:    port = _T("GTK"); break;
1392             case wxWINDOWS:
1393             case wxPENWINDOWS:
1394             case wxWINDOWS_NT:
1395             case wxWIN32S:
1396             case wxWIN95:
1397             case wxWIN386:      port = _T("MS Windows"); break;
1398             case wxMGL_UNIX:
1399             case wxMGL_X:
1400             case wxMGL_WIN32:
1401             case wxMGL_OS2:     port = _T("MGL"); break;
1402             case wxWINDOWS_OS2:
1403             case wxOS2_PM:      port = _T("OS/2"); break;
1404             default:            port = _T("unknown"); break;
1405         }
1406
1407         wxMessageBox(wxString::Format(
1408                                       _T(
1409                                         "       wxWindows Library (%s port)\n"
1410                                         "Version %u.%u.%u, compiled at %s %s\n"
1411                                         "   Copyright (c) 1995-2000 wxWindows team"
1412                                         ),
1413                                       port.c_str(),
1414                                       wxMAJOR_VERSION,
1415                                       wxMINOR_VERSION,
1416                                       wxRELEASE_NUMBER,
1417                                       __DATE__,
1418                                       __TIME__
1419                                      ),
1420                      _T("wxWindows information"),
1421                      wxICON_INFORMATION | wxOK,
1422                      (wxWindow *)this);
1423     }
1424     else
1425     {
1426         event.Skip();
1427     }
1428 }
1429
1430 // ----------------------------------------------------------------------------
1431 // list classes implementation
1432 // ----------------------------------------------------------------------------
1433
1434 void wxWindowListNode::DeleteData()
1435 {
1436     delete (wxWindow *)GetData();
1437 }
1438