src/os2/listbox.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/os2/listbox.cpp
   3 // Purpose:     wxListBox
   4 // Author:      David Webster
   5 // Modified by:
   6 // Created:     10/09/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) David Webster
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if wxUSE_LISTBOX
  16
  17 #include "wx/listbox.h"
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/dynarray.h"
  21     #include "wx/settings.h"
  22     #include "wx/brush.h"
  23     #include "wx/font.h"
  24     #include "wx/dc.h"
  25     #include "wx/dcscreen.h"
  26     #include "wx/utils.h"
  27     #include "wx/scrolwin.h"
  28     #include "wx/log.h"
  29     #include "wx/window.h"
  30 #endif
  31
  32 #include "wx/os2/private.h"
  33
  34 #define INCL_M
  35 #include <os2.h>
  36
  37 #if wxUSE_OWNER_DRAWN
  38     #include  "wx/ownerdrw.h"
  39 #endif
  40
  41 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControlWithItems)
  42
  43 // ============================================================================
  44 // list box item declaration and implementation
  45 // ============================================================================
  46
  47 #if wxUSE_OWNER_DRAWN
  48
  49 class wxListBoxItem : public wxOwnerDrawn
  50 {
  51 public:
  52     wxListBoxItem(const wxString& rsStr = wxEmptyString);
  53 };
  54
  55 wxListBoxItem::wxListBoxItem(
  56   const wxString& rsStr
  57 )
  58 : wxOwnerDrawn( rsStr
  59                ,false
  60               )
  61 {
  62     //
  63     // No bitmaps/checkmarks
  64     //
  65     SetMarginWidth(0);
  66 } // end of wxListBoxItem::wxListBoxItem
  67
  68 wxOwnerDrawn* wxListBox::CreateItem( size_t WXUNUSED(n) )
  69 {
  70     return new wxListBoxItem();
  71 } // end of wxListBox::CreateItem
  72
  73 #endif  //USE_OWNER_DRAWN
  74
  75 // ============================================================================
  76 // list box control implementation
  77 // ============================================================================
  78
  79 // Listbox item
  80 wxListBox::wxListBox()
  81 {
  82     m_nNumItems = 0;
  83     m_nSelected = 0;
  84 } // end of wxListBox::wxListBox
  85
  86 bool wxListBox::Create(
  87   wxWindow*                         pParent
  88 , wxWindowID                        vId
  89 , const wxPoint&                    rPos
  90 , const wxSize&                     rSize
  91 , const wxArrayString&              asChoices
  92 , long                              lStyle
  93 , const wxValidator&                rValidator
  94 , const wxString&                   rsName
  95 )
  96 {
  97     wxCArrayString chs(asChoices);
  98
  99     return Create(pParent, vId, rPos, rSize, chs.GetCount(), chs.GetStrings(),
 100                   lStyle, rValidator, rsName);
 101 }
 102
 103 bool wxListBox::Create( wxWindow* pParent,
 104                         wxWindowID vId,
 105                         const wxPoint& rPos,
 106                         const wxSize& rSize,
 107                         int n,
 108                         const wxString asChoices[],
 109                         long lStyle,
 110                         const wxValidator& rValidator,
 111                         const wxString& rsName )
 112 {
 113     m_nNumItems = 0;
 114     m_hWnd      = 0;
 115     m_nSelected = 0;
 116
 117     SetName(rsName);
 118 #if wxUSE_VALIDATORS
 119     SetValidator(rValidator);
 120 #endif
 121
 122     if (pParent)
 123         pParent->AddChild(this);
 124
 125     wxSystemSettings                vSettings;
 126
 127     SetBackgroundColour(vSettings.GetColour(wxSYS_COLOUR_WINDOW));
 128     SetForegroundColour(pParent->GetForegroundColour());
 129
 130     m_windowId = (vId == -1) ? (int)NewControlId() : vId;
 131
 132     int                             nX      = rPos.x;
 133     int                             nY      = rPos.y;
 134     int                             nWidth  = rSize.x;
 135     int                             nHeight = rSize.y;
 136
 137     m_windowStyle = lStyle;
 138
 139     lStyle = WS_VISIBLE;
 140
 141     if (m_windowStyle & wxCLIP_SIBLINGS )
 142         lStyle |= WS_CLIPSIBLINGS;
 143     if (m_windowStyle & wxLB_MULTIPLE)
 144         lStyle |= LS_MULTIPLESEL;
 145     else if (m_windowStyle & wxLB_EXTENDED)
 146         lStyle |= LS_EXTENDEDSEL;
 147     if (m_windowStyle & wxLB_HSCROLL)
 148         lStyle |= LS_HORZSCROLL;
 149     if (m_windowStyle & wxLB_OWNERDRAW)
 150         lStyle |= LS_OWNERDRAW;
 151
 152     //
 153     // Without this style, you get unexpected heights, so e.g. constraint layout
 154     // doesn't work properly
 155     //
 156     lStyle |= LS_NOADJUSTPOS;
 157
 158     m_hWnd = (WXHWND)::WinCreateWindow( GetWinHwnd(pParent) // Parent
 159                                        ,WC_LISTBOX          // Default Listbox class
 160                                        ,"LISTBOX"           // Control's name
 161                                        ,lStyle              // Initial Style
 162                                        ,0, 0, 0, 0          // Position and size
 163                                        ,GetWinHwnd(pParent) // Owner
 164                                        ,HWND_TOP            // Z-Order
 165                                        ,(HMENU)m_windowId   // Id
 166                                        ,NULL                // Control Data
 167                                        ,NULL                // Presentation Parameters
 168                                       );
 169     if (m_hWnd == 0)
 170     {
 171         return false;
 172     }
 173
 174     //
 175     // Subclass again for purposes of dialog editing mode
 176     //
 177     SubclassWin(m_hWnd);
 178
 179     LONG                            lUi;
 180
 181     for (lUi = 0; lUi < (LONG)n; lUi++)
 182     {
 183         Append(asChoices[lUi]);
 184     }
 185     wxFont*                          pTextFont = new wxFont( 10
 186                                                             ,wxMODERN
 187                                                             ,wxNORMAL
 188                                                             ,wxNORMAL
 189                                                            );
 190     SetFont(*pTextFont);
 191
 192     //
 193     // Set OS/2 system colours for Listbox items and highlighting
 194     //
 195     wxColour                        vColour;
 196
 197     vColour = wxSystemSettingsNative::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT);
 198
 199     LONG                            lColor = (LONG)vColour.GetPixel();
 200
 201     ::WinSetPresParam( m_hWnd
 202                       ,PP_HILITEFOREGROUNDCOLOR
 203                       ,sizeof(LONG)
 204                       ,(PVOID)&lColor
 205                      );
 206     vColour = wxSystemSettingsNative::GetColour(wxSYS_COLOUR_HIGHLIGHT);
 207     lColor = (LONG)vColour.GetPixel();
 208     ::WinSetPresParam( m_hWnd
 209                       ,PP_HILITEBACKGROUNDCOLOR
 210                       ,sizeof(LONG)
 211                       ,(PVOID)&lColor
 212                      );
 213
 214     SetXComp(0);
 215     SetYComp(0);
 216     SetSize( nX
 217             ,nY
 218             ,nWidth
 219             ,nHeight
 220            );
 221     delete pTextFont;
 222     return true;
 223 } // end of wxListBox::Create
 224
 225 wxListBox::~wxListBox()
 226 {
 227 #if wxUSE_OWNER_DRAWN
 228     size_t lUiCount = m_aItems.Count();
 229
 230     while (lUiCount-- != 0)
 231     {
 232         delete m_aItems[lUiCount];
 233     }
 234 #endif // wxUSE_OWNER_DRAWN
 235 } // end of wxListBox::~wxListBox
 236
 237 void wxListBox::SetupColours()
 238 {
 239     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 240     SetForegroundColour(GetParent()->GetForegroundColour());
 241 } // end of wxListBox::SetupColours
 242
 243 // ----------------------------------------------------------------------------
 244 // implementation of wxListBoxBase methods
 245 // ----------------------------------------------------------------------------
 246
 247 void wxListBox::DoSetFirstItem(int N)
 248 {
 249     wxCHECK_RET( IsValid(N),
 250                  wxT("invalid index in wxListBox::SetFirstItem") );
 251
 252     ::WinSendMsg(GetHwnd(), LM_SETTOPINDEX, MPFROMLONG(N), (MPARAM)0);
 253 } // end of wxListBox::DoSetFirstItem
 254
 255 void wxListBox::DoDeleteOneItem(unsigned int n)
 256 {
 257     wxCHECK_RET( IsValid(n),
 258                  wxT("invalid index in wxListBox::Delete") );
 259
 260 #if wxUSE_OWNER_DRAWN
 261     delete m_aItems[n];
 262     m_aItems.RemoveAt(n);
 263 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 264
 265     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)n, (MPARAM)0);
 266     m_nNumItems--;
 267 } // end of wxListBox::DoSetFirstItem
 268
 269 int wxListBox::DoInsertItems(const wxArrayStringsAdapter & items,
 270                              unsigned int pos,
 271                              void **clientData,
 272                              wxClientDataType type)
 273 {
 274     long lIndex = 0;
 275     LONG lIndexType = 0;
 276     bool incrementPos = false;
 277
 278     if (IsSorted())
 279         lIndexType = LIT_SORTASCENDING;
 280     else if (pos == GetCount())
 281         lIndexType = LIT_END;
 282     else
 283     {
 284         lIndexType = (LONG)pos;
 285         incrementPos = true;
 286     }
 287
 288     int n = wxNOT_FOUND;
 289
 290     unsigned int count = items.GetCount();
 291     for (unsigned int i = 0; i < count; i++)
 292     {
 293         n = (int)::WinSendMsg(GetHwnd(), LM_INSERTITEM, (MPARAM)lIndexType, (MPARAM)items[i].wx_str());
 294         if (n < 0)
 295         {
 296             wxLogLastError(_T("WinSendMsg(LM_INSERTITEM)"));
 297             n = wxNOT_FOUND;
 298             break;
 299         }
 300         ++m_nNumItems;
 301
 302 #if wxUSE_OWNER_DRAWN
 303         if (HasFlag(wxLB_OWNERDRAW))
 304         {
 305             wxOwnerDrawn*               pNewItem = CreateItem(n); // dummy argument
 306             wxScreenDC                  vDc; // FIXME: is it really needed here?
 307
 308             pNewItem->SetName(items[i]);
 309             m_aItems.Insert(pNewItem, n);
 310             ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, (MPARAM)n, MPFROMP(pNewItem));
 311             pNewItem->SetFont(GetFont());
 312         }
 313 #endif
 314         AssignNewItemClientData(n, clientData, i, type);
 315
 316         if (incrementPos)
 317             ++lIndexType;
 318     }
 319
 320     return n;
 321 } // end of wxListBox::DoInsertAppendItemsWithData
 322
 323 void wxListBox::DoClear()
 324 {
 325 #if wxUSE_OWNER_DRAWN
 326     unsigned int lUiCount = m_aItems.Count();
 327
 328     while (lUiCount-- != 0)
 329     {
 330         delete m_aItems[lUiCount];
 331     }
 332
 333     m_aItems.Clear();
 334 #endif // wxUSE_OWNER_DRAWN
 335     ::WinSendMsg(GetHwnd(), LM_DELETEALL, (MPARAM)0, (MPARAM)0);
 336
 337     m_nNumItems = 0;
 338 } // end of wxListBox::Clear
 339
 340 void wxListBox::DoSetSelection( int N, bool bSelect)
 341 {
 342     wxCHECK_RET( IsValid(N),
 343                  wxT("invalid index in wxListBox::SetSelection") );
 344     ::WinSendMsg( GetHwnd()
 345                  ,LM_SELECTITEM
 346                  ,MPFROMLONG(N)
 347                  ,(MPARAM)bSelect
 348                 );
 349     if(m_windowStyle & wxLB_OWNERDRAW)
 350         Refresh();
 351 } // end of wxListBox::SetSelection
 352
 353 bool wxListBox::IsSelected( int N ) const
 354 {
 355     wxCHECK_MSG( IsValid(N), false,
 356                  wxT("invalid index in wxListBox::Selected") );
 357
 358     LONG                            lItem;
 359
 360     if (GetWindowStyleFlag() & wxLB_EXTENDED)
 361     {
 362         if (N == 0)
 363             lItem = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0));
 364         else
 365             lItem = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)(N - 1), (MPARAM)0));
 366     }
 367     else
 368     {
 369         lItem = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0));
 370     }
 371     return (lItem == (LONG)N && lItem != LIT_NONE);
 372 } // end of wxListBox::IsSelected
 373
 374 void* wxListBox::DoGetItemClientData(unsigned int n) const
 375 {
 376     wxCHECK_MSG( IsValid(n), NULL,
 377                  wxT("invalid index in wxListBox::GetClientData") );
 378
 379     return((void *)::WinSendMsg(GetHwnd(), LM_QUERYITEMHANDLE, MPFROMLONG(n), (MPARAM)0));
 380 } // end of wxListBox::DoGetItemClientData
 381
 382 void wxListBox::DoSetItemClientData(unsigned int n, void* pClientData)
 383 {
 384     wxCHECK_RET( IsValid(n),
 385                  wxT("invalid index in wxListBox::SetClientData") );
 386
 387 #if wxUSE_OWNER_DRAWN
 388     if ( m_windowStyle & wxLB_OWNERDRAW )
 389     {
 390         //
 391         // Client data must be pointer to wxOwnerDrawn, otherwise we would crash
 392         // in OnMeasure/OnDraw.
 393         //
 394         wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
 395     }
 396 #endif // wxUSE_OWNER_DRAWN
 397
 398     ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, MPFROMLONG(n), MPFROMP(pClientData));
 399 } // end of wxListBox::DoSetItemClientData
 400
 401 bool wxListBox::HasMultipleSelection() const
 402 {
 403     return (m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED);
 404 } // end of wxListBox::HasMultipleSelection
 405
 406 int wxListBox::GetSelections( wxArrayInt& raSelections ) const
 407 {
 408     int  nCount = 0;
 409     LONG lItem;
 410
 411
 412     raSelections.Empty();
 413     if (HasMultipleSelection())
 414     {
 415         lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 416                                         ,LM_QUERYSELECTION
 417                                         ,(MPARAM)LIT_FIRST
 418                                         ,(MPARAM)0
 419                                        )
 420                           );
 421         if (lItem != LIT_NONE)
 422         {
 423             nCount++;
 424             while ((lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 425                                                     ,LM_QUERYSELECTION
 426                                                     ,(MPARAM)lItem
 427                                                     ,(MPARAM)0
 428                                                    )
 429                                       )) != LIT_NONE)
 430             {
 431                 nCount++;
 432             }
 433             raSelections.Alloc(nCount);
 434             lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 435                                             ,LM_QUERYSELECTION
 436                                             ,(MPARAM)LIT_FIRST
 437                                             ,(MPARAM)0
 438                                            )
 439                               );
 440
 441             raSelections.Add((int)lItem);
 442             while ((lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 443                                                     ,LM_QUERYSELECTION
 444                                                     ,(MPARAM)lItem
 445                                                     ,(MPARAM)0
 446                                                    )
 447                                       )) != LIT_NONE)
 448             {
 449                 raSelections.Add((int)lItem);
 450             }
 451             return nCount;
 452         }
 453     }
 454     else  // single-selection listbox
 455     {
 456         lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 457                                         ,LM_QUERYSELECTION
 458                                         ,(MPARAM)LIT_FIRST
 459                                         ,(MPARAM)0
 460                                        )
 461                           );
 462         raSelections.Add((int)lItem);
 463         return 1;
 464     }
 465     return 0;
 466 } // end of wxListBox::GetSelections
 467
 468 int wxListBox::GetSelection() const
 469 {
 470     wxCHECK_MSG( !HasMultipleSelection(),
 471                  -1,
 472                  wxT("GetSelection() can't be used with multiple-selection "
 473                     "listboxes, use GetSelections() instead.") );
 474
 475     return(LONGFROMMR(::WinSendMsg( GetHwnd()
 476                                    ,LM_QUERYSELECTION
 477                                    ,(MPARAM)LIT_FIRST
 478                                    ,(MPARAM)0
 479                                   )
 480                      ));
 481 } // end of wxListBox::GetSelection
 482
 483 wxString wxListBox::GetString(unsigned int n) const
 484 {
 485     LONG     lLen = 0;
 486     wxChar*  zBuf;
 487     wxString sResult;
 488
 489     wxCHECK_MSG( IsValid(n), wxEmptyString,
 490                  wxT("invalid index in wxListBox::GetClientData") );
 491
 492     lLen = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)n, (MPARAM)0));
 493     zBuf = new wxChar[lLen + 1];
 494     ::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXT, MPFROM2SHORT((SHORT)n, (SHORT)lLen), (MPARAM)zBuf);
 495     zBuf[lLen] = '\0';
 496     sResult = zBuf;
 497     delete [] zBuf;
 498     return sResult;
 499 } // end of wxListBox::GetString
 500
 501 void wxListBox::SetString(unsigned int n, const wxString& rsString)
 502 {
 503     wxCHECK_RET( IsValid(n),
 504                  wxT("invalid index in wxListBox::SetString") );
 505
 506     //
 507     // Remember the state of the item
 508     //
 509     bool           bWasSelected = IsSelected(n);
 510     void*          pOldData = NULL;
 511     wxClientData*  pOldObjData = NULL;
 512
 513     if ( HasClientUntypedData() )
 514         pOldData = GetClientData(n);
 515     else if ( HasClientObjectData() )
 516         pOldObjData = GetClientObject(n);
 517
 518     //
 519     // Delete and recreate it
 520     //
 521     ::WinSendMsg( GetHwnd()
 522                  ,LM_DELETEITEM
 523                  ,(MPARAM)n
 524                  ,(MPARAM)0
 525                 );
 526
 527     int nNewN = n;
 528
 529     if (n == (m_nNumItems - 1))
 530         nNewN = -1;
 531
 532     ::WinSendMsg( GetHwnd()
 533                  ,LM_INSERTITEM
 534                  ,(MPARAM)nNewN
 535                  ,(MPARAM)rsString.wx_str()
 536                 );
 537
 538     //
 539     // Restore the client data
 540     //
 541     if (pOldData)
 542         SetClientData(n, pOldData);
 543     else if (pOldObjData)
 544         SetClientObject(n, pOldObjData);
 545
 546     //
 547     // We may have lost the selection
 548     //
 549     if (bWasSelected)
 550         Select(n);
 551
 552 #if wxUSE_OWNER_DRAWN
 553     if (m_windowStyle & wxLB_OWNERDRAW)
 554         //
 555         // Update item's text
 556         //
 557         m_aItems[n]->SetName(rsString);
 558 #endif  //USE_OWNER_DRAWN
 559 } // end of wxListBox::SetString
 560
 561 unsigned int wxListBox::GetCount() const
 562 {
 563     return m_nNumItems;
 564 }
 565
 566 // ----------------------------------------------------------------------------
 567 // helpers
 568 // ----------------------------------------------------------------------------
 569
 570 wxSize wxListBox::DoGetBestSize() const
 571 {
 572     //
 573     // Find the widest string
 574     //
 575     int        nLine;
 576     int        nListbox = 0;
 577     int        nCx;
 578     int        nCy;
 579     wxFont     vFont = (wxFont)GetFont();
 580
 581     for (unsigned int i = 0; i < m_nNumItems; i++)
 582     {
 583         wxString vStr(GetString(i));
 584
 585         GetTextExtent( vStr, &nLine, NULL );
 586         if (nLine > nListbox)
 587             nListbox = nLine;
 588     }
 589
 590     //
 591     // Give it some reasonable default value if there are no strings in the
 592     // list.
 593     //
 594     if (nListbox == 0)
 595         nListbox = 100;
 596
 597     //
 598     // The listbox should be slightly larger than the widest string
 599     //
 600     wxGetCharSize( GetHWND()
 601                   ,&nCx
 602                   ,&nCy
 603                   ,&vFont
 604                  );
 605     nListbox += 3 * nCx;
 606
 607     int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * (wxMax(m_nNumItems, 7));
 608
 609     return wxSize( nListbox
 610                   ,hListbox
 611                  );
 612 } // end of wxListBox::DoGetBestSize
 613
 614 // ----------------------------------------------------------------------------
 615 // callbacks
 616 // ----------------------------------------------------------------------------
 617
 618 bool wxListBox::OS2Command(
 619   WXUINT                            uParam
 620 , WXWORD                            WXUNUSED(wId))
 621 {
 622     wxEventType                     eEvtType;
 623
 624     if (uParam == LN_SELECT)
 625     {
 626         eEvtType = wxEVT_COMMAND_LISTBOX_SELECTED;
 627     }
 628     else if (uParam == LN_ENTER)
 629     {
 630         eEvtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
 631     }
 632     else
 633     {
 634         //
 635         // Some event we're not interested in
 636         //
 637         return false;
 638     }
 639     wxCommandEvent                  vEvent( eEvtType
 640                                            ,m_windowId
 641                                           );
 642
 643     vEvent.SetEventObject(this);
 644
 645     wxArrayInt aSelections;
 646     int        n;
 647     int        nCount = GetSelections(aSelections);
 648
 649     if (nCount > 0)
 650     {
 651         n = aSelections[0];
 652         if (HasClientObjectData())
 653             vEvent.SetClientObject(GetClientObject(n));
 654         else if ( HasClientUntypedData() )
 655             vEvent.SetClientData(GetClientData(n));
 656         vEvent.SetString(GetString(n));
 657     }
 658     else
 659     {
 660         n = -1;
 661     }
 662     vEvent.SetInt(n);
 663     return HandleWindowEvent(vEvent);
 664 } // end of wxListBox::OS2Command
 665
 666 // ----------------------------------------------------------------------------
 667 // wxCheckListBox support
 668 // ----------------------------------------------------------------------------
 669
 670 #if wxUSE_OWNER_DRAWN
 671
 672 //
 673 // Drawing
 674 // -------
 675 //
 676 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
 677
 678 long wxListBox::OS2OnMeasure(WXMEASUREITEMSTRUCT* pItem)
 679 {
 680     if (!pItem)
 681         pItem = (WXMEASUREITEMSTRUCT*)new OWNERITEM;
 682
 683     POWNERITEM                      pMeasureStruct = (POWNERITEM)pItem;
 684     wxScreenDC                      vDc;
 685
 686     //
 687     // Only owner-drawn control should receive this message
 688     //
 689     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 690
 691     vDc.SetFont(GetFont());
 692
 693     wxCoord                         vHeight;
 694     wxCoord                         vWidth;
 695
 696     GetSize( &vWidth
 697             ,NULL
 698            );
 699
 700     pMeasureStruct->rclItem.xRight = (USHORT)vWidth;
 701     pMeasureStruct->rclItem.xLeft  = 0;
 702     pMeasureStruct->rclItem.yTop   = 0;
 703     pMeasureStruct->rclItem.yBottom = 0;
 704
 705     vHeight = (wxCoord)(vDc.GetCharHeight() * 2.5);
 706     pMeasureStruct->rclItem.yTop  = (USHORT)vHeight;
 707
 708     return long(MRFROM2SHORT((USHORT)vHeight, (USHORT)vWidth));
 709 } // end of wxListBox::OS2OnMeasure
 710
 711 bool wxListBox::OS2OnDraw (
 712   WXDRAWITEMSTRUCT*                 pItem
 713 )
 714 {
 715     POWNERITEM                      pDrawStruct = (POWNERITEM)pItem;
 716     LONG                            lItemID = pDrawStruct->idItem;
 717     int                             eAction = 0;
 718     int                             eStatus = 0;
 719
 720     //
 721     // Only owner-drawn control should receive this message
 722     //
 723     wxCHECK(((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), false);
 724
 725
 726     //
 727     // The item may be -1 for an empty listbox
 728     //
 729     if (lItemID == -1L)
 730         return false;
 731
 732     wxListBoxItem*                   pData = (wxListBoxItem*)PVOIDFROMMR( ::WinSendMsg( GetHwnd()
 733                                                                                        ,LM_QUERYITEMHANDLE
 734                                                                                        ,MPFROMLONG(pDrawStruct->idItem)
 735                                                                                        ,(MPARAM)0
 736                                                                                       )
 737                                                                         );
 738
 739     wxCHECK(pData, false );
 740
 741     wxDC    vDc;
 742     wxPoint pt1( pDrawStruct->rclItem.xLeft, pDrawStruct->rclItem.yTop );
 743     wxPoint pt2( pDrawStruct->rclItem.xRight, pDrawStruct->rclItem.yBottom );
 744     wxRect  vRect( pt1, pt2 );
 745
 746     vDc.SetHPS(pDrawStruct->hps);
 747
 748     if (pDrawStruct->fsAttribute == pDrawStruct->fsAttributeOld)
 749     {
 750         //
 751         // Entire Item needs to be redrawn (either it has reappeared from
 752         // behind another window or is being displayed for the first time
 753         //
 754         eAction = wxOwnerDrawn::wxODDrawAll;
 755
 756         if (pDrawStruct->fsAttribute & MIA_HILITED)
 757         {
 758             //
 759             // If it is currently selected we let the system handle it
 760             //
 761             eStatus |= wxOwnerDrawn::wxODSelected;
 762         }
 763         if (pDrawStruct->fsAttribute & MIA_CHECKED)
 764         {
 765             //
 766             // If it is currently checked we draw our own
 767             //
 768             eStatus |= wxOwnerDrawn::wxODChecked;
 769             pDrawStruct->fsAttributeOld = pDrawStruct->fsAttribute &= ~MIA_CHECKED;
 770         }
 771         if (pDrawStruct->fsAttribute & MIA_DISABLED)
 772         {
 773             //
 774             // If it is currently disabled we let the system handle it
 775             //
 776             eStatus |= wxOwnerDrawn::wxODDisabled;
 777         }
 778         //
 779         // Don't really care about framed (indicationg focus) or NoDismiss
 780         //
 781     }
 782     else
 783     {
 784         if (pDrawStruct->fsAttribute & MIA_HILITED)
 785         {
 786             eAction = wxOwnerDrawn::wxODDrawAll;
 787             eStatus |= wxOwnerDrawn::wxODSelected;
 788             //
 789             // Keep the system from trying to highlight with its bogus colors
 790             //
 791             pDrawStruct->fsAttributeOld = pDrawStruct->fsAttribute &= ~MIA_HILITED;
 792         }
 793         else if (!(pDrawStruct->fsAttribute & MIA_HILITED))
 794         {
 795             eAction = wxOwnerDrawn::wxODDrawAll;
 796             eStatus = 0;
 797             //
 798             // Keep the system from trying to highlight with its bogus colors
 799             //
 800             pDrawStruct->fsAttribute = pDrawStruct->fsAttributeOld &= ~MIA_HILITED;
 801         }
 802         else
 803         {
 804             //
 805             // For now we don't care about anything else
 806             // just ignore the entire message!
 807             //
 808             return true;
 809         }
 810     }
 811     return pData->OnDrawItem( vDc
 812                              ,vRect
 813                              ,(wxOwnerDrawn::wxODAction)eAction
 814                              ,(wxOwnerDrawn::wxODStatus)eStatus
 815                             );
 816 } // end of wxListBox::OS2OnDraw
 817
 818 #endif // ndef for wxUSE_OWNER_DRAWN
 819
 820 #endif // wxUSE_LISTBOX