src/os2/listbox.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 #include "wx/window.h"
  16 #include "wx/os2/private.h"
  17
  18 #ifndef WX_PRECOMP
  19 #include "wx/listbox.h"
  20 #include "wx/settings.h"
  21 #include "wx/brush.h"
  22 #include "wx/font.h"
  23 #include "wx/dc.h"
  24 #include "wx/dcscreen.h"
  25 #include "wx/utils.h"
  26 #include "wx/scrolwin.h"
  27 #endif
  28
  29 #define INCL_M
  30 #include <os2.h>
  31
  32 #include "wx/dynarray.h"
  33 #include "wx/log.h"
  34
  35 #if wxUSE_LISTBOX
  36
  37 #if wxUSE_OWNER_DRAWN
  38     #include  "wx/ownerdrw.h"
  39 #endif
  40
  41   IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
  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 = "");
  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(
  69   size_t                            n
  70 )
  71 {
  72     return new wxListBoxItem();
  73 } // end of wxListBox::CreateItem
  74
  75 #endif  //USE_OWNER_DRAWN
  76
  77 // ============================================================================
  78 // list box control implementation
  79 // ============================================================================
  80
  81 // Listbox item
  82 wxListBox::wxListBox()
  83 {
  84     m_nNumItems = 0;
  85     m_nSelected = 0;
  86 } // end of wxListBox::wxListBox
  87
  88 bool wxListBox::Create(
  89   wxWindow*                         pParent
  90 , wxWindowID                        vId
  91 , const wxPoint&                    rPos
  92 , const wxSize&                     rSize
  93 , const wxArrayString&              asChoices
  94 , long                              lStyle
  95 , const wxValidator&                rValidator
  96 , const wxString&                   rsName
  97 )
  98 {
  99     wxCArrayString chs(asChoices);
 100
 101     return Create(pParent, vId, rPos, rSize, chs.GetCount(), chs.GetStrings(),
 102                   lStyle, rValidator, rsName);
 103 }
 104
 105 bool wxListBox::Create(
 106   wxWindow*                         pParent
 107 , wxWindowID                        vId
 108 , const wxPoint&                    rPos
 109 , const wxSize&                     rSize
 110 , int                               n
 111 , const wxString                    asChoices[]
 112 , long                              lStyle
 113 , const wxValidator&                rValidator
 114 , const wxString&                   rsName
 115 )
 116 {
 117     m_nNumItems = 0;
 118     m_hWnd      = 0;
 119     m_nSelected = 0;
 120
 121     SetName(rsName);
 122 #if wxUSE_VALIDATORS
 123     SetValidator(rValidator);
 124 #endif
 125
 126     if (pParent)
 127         pParent->AddChild(this);
 128
 129     wxSystemSettings                vSettings;
 130
 131     SetBackgroundColour(vSettings.GetColour(wxSYS_COLOUR_WINDOW));
 132     SetForegroundColour(pParent->GetForegroundColour());
 133
 134     m_windowId = (vId == -1) ? (int)NewControlId() : vId;
 135
 136     int                             nX      = rPos.x;
 137     int                             nY      = rPos.y;
 138     int                             nWidth  = rSize.x;
 139     int                             nHeight = rSize.y;
 140
 141     m_windowStyle = lStyle;
 142
 143     lStyle = WS_VISIBLE;
 144
 145     if (m_windowStyle & wxCLIP_SIBLINGS )
 146         lStyle |= WS_CLIPSIBLINGS;
 147     if (m_windowStyle & wxLB_MULTIPLE)
 148         lStyle |= LS_MULTIPLESEL;
 149     else if (m_windowStyle & wxLB_EXTENDED)
 150         lStyle |= LS_EXTENDEDSEL;
 151     if (m_windowStyle & wxLB_HSCROLL)
 152         lStyle |= LS_HORZSCROLL;
 153     if (m_windowStyle & wxLB_OWNERDRAW)
 154         lStyle |= LS_OWNERDRAW;
 155
 156     //
 157     // Without this style, you get unexpected heights, so e.g. constraint layout
 158     // doesn't work properly
 159     //
 160     lStyle |= LS_NOADJUSTPOS;
 161
 162     m_hWnd = (WXHWND)::WinCreateWindow( GetWinHwnd(pParent) // Parent
 163                                        ,WC_LISTBOX          // Default Listbox class
 164                                        ,"LISTBOX"           // Control's name
 165                                        ,lStyle              // Initial Style
 166                                        ,0, 0, 0, 0          // Position and size
 167                                        ,GetWinHwnd(pParent) // Owner
 168                                        ,HWND_TOP            // Z-Order
 169                                        ,(HMENU)m_windowId   // Id
 170                                        ,NULL                // Control Data
 171                                        ,NULL                // Presentation Parameters
 172                                       );
 173     if (m_hWnd == 0)
 174     {
 175         return false;
 176     }
 177
 178     //
 179     // Subclass again for purposes of dialog editing mode
 180     //
 181     SubclassWin(m_hWnd);
 182
 183     LONG                            lUi;
 184
 185     for (lUi = 0; lUi < (LONG)n; lUi++)
 186     {
 187         Append(asChoices[lUi]);
 188     }
 189     wxFont*                          pTextFont = new wxFont( 10
 190                                                             ,wxMODERN
 191                                                             ,wxNORMAL
 192                                                             ,wxNORMAL
 193                                                            );
 194     SetFont(*pTextFont);
 195
 196     //
 197     // Set standard wxWidgets colors for Listbox items and highlighting
 198     //
 199     wxColour                        vColour;
 200
 201     vColour.Set(wxString("WHITE"));
 202
 203     LONG                            lColor = (LONG)vColour.GetPixel();
 204
 205     ::WinSetPresParam( m_hWnd
 206                       ,PP_HILITEFOREGROUNDCOLOR
 207                       ,sizeof(LONG)
 208                       ,(PVOID)&lColor
 209                      );
 210     vColour.Set(wxString("NAVY"));
 211     lColor = (LONG)vColour.GetPixel();
 212     ::WinSetPresParam( m_hWnd
 213                       ,PP_HILITEBACKGROUNDCOLOR
 214                       ,sizeof(LONG)
 215                       ,(PVOID)&lColor
 216                      );
 217
 218     SetSize( nX
 219             ,nY
 220             ,nWidth
 221             ,nHeight
 222            );
 223     delete pTextFont;
 224     return true;
 225 } // end of wxListBox::Create
 226
 227 wxListBox::~wxListBox()
 228 {
 229 #if wxUSE_OWNER_DRAWN
 230     size_t                          lUiCount = m_aItems.Count();
 231
 232     while (lUiCount-- != 0)
 233     {
 234         delete m_aItems[lUiCount];
 235     }
 236 #endif // wxUSE_OWNER_DRAWN
 237 } // end of wxListBox::~wxListBox
 238
 239 void wxListBox::SetupColours()
 240 {
 241     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 242     SetForegroundColour(GetParent()->GetForegroundColour());
 243 } // end of wxListBox::SetupColours
 244
 245 // ----------------------------------------------------------------------------
 246 // implementation of wxListBoxBase methods
 247 // ----------------------------------------------------------------------------
 248
 249 void wxListBox::DoSetFirstItem(
 250   int                               N
 251 )
 252 {
 253     wxCHECK_RET( N >= 0 && N < m_nNumItems,
 254                  wxT("invalid index in wxListBox::SetFirstItem") );
 255
 256     ::WinSendMsg(GetHwnd(), LM_SETTOPINDEX, MPFROMLONG(N), (MPARAM)0);
 257 } // end of wxListBox::DoSetFirstItem
 258
 259 void wxListBox::Delete(
 260   int                               N
 261 )
 262 {
 263     wxCHECK_RET( N >= 0 && N < m_nNumItems,
 264                  wxT("invalid index in wxListBox::Delete") );
 265
 266 #if wxUSE_OWNER_DRAWN
 267     delete m_aItems[N];
 268     m_aItems.RemoveAt(N);
 269 #else // !wxUSE_OWNER_DRAWN
 270     if (HasClientObjectData())
 271     {
 272         delete GetClientObject(N);
 273     }
 274 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 275
 276     ::WinSendMsg(GetHwnd(), LM_DELETEITEM, (MPARAM)N, (MPARAM)0);
 277     m_nNumItems--;
 278 } // end of wxListBox::DoSetFirstItem
 279
 280 int wxListBox::DoAppend(
 281   const wxString&                   rsItem
 282 )
 283 {
 284     long                            lIndex = 0;
 285     LONG                            lIndexType = 0;
 286
 287     if (m_windowStyle & wxLB_SORT)
 288         lIndexType = LIT_SORTASCENDING;
 289     else
 290         lIndexType = LIT_END;
 291     lIndex = (long)::WinSendMsg(GetHwnd(), LM_INSERTITEM, (MPARAM)lIndexType, (MPARAM)rsItem.c_str());
 292     m_nNumItems++;
 293
 294 #if wxUSE_OWNER_DRAWN
 295     if (m_windowStyle & wxLB_OWNERDRAW)
 296     {
 297         wxOwnerDrawn*               pNewItem = CreateItem(lIndex); // dummy argument
 298         wxScreenDC                  vDc;
 299
 300
 301         pNewItem->SetName(rsItem);
 302         m_aItems.Insert(pNewItem, lIndex);
 303         ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, (MPARAM)lIndex, MPFROMP(pNewItem));
 304         pNewItem->SetFont(GetFont());
 305     }
 306 #endif
 307     return (int)lIndex;
 308 } // end of wxListBox::DoAppend
 309
 310 void wxListBox::DoSetItems(
 311   const wxArrayString&              raChoices
 312 , void**                            ppClientData
 313 )
 314 {
 315     BOOL                            bHideAndShow = IsShown();
 316     int                             i;
 317     LONG                            lIndexType = 0;
 318
 319     if (bHideAndShow)
 320     {
 321         ::WinShowWindow(GetHwnd(), FALSE);
 322     }
 323     ::WinSendMsg(GetHwnd(), LM_DELETEALL, (MPARAM)0, (MPARAM)0);
 324     m_nNumItems = raChoices.GetCount();
 325     for (i = 0; i < m_nNumItems; i++)
 326     {
 327
 328         if (m_windowStyle & wxLB_SORT)
 329             lIndexType = LIT_SORTASCENDING;
 330         else
 331             lIndexType = LIT_END;
 332         ::WinSendMsg(GetHwnd(), LM_INSERTITEM, (MPARAM)lIndexType, (MPARAM)raChoices[i].c_str());
 333
 334         if (ppClientData)
 335         {
 336 #if wxUSE_OWNER_DRAWN
 337             wxASSERT_MSG(ppClientData[i] == NULL,
 338                          wxT("Can't use client data with owner-drawn listboxes"));
 339 #else // !wxUSE_OWNER_DRAWN
 340             ::WinSendMsg(WinUtil_GetHwnd(), LM_SETITEMHANDLE, MPFROMLONG(lCount), MPFROMP(ppClientData[i]));
 341 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 342         }
 343     }
 344
 345 #if wxUSE_OWNER_DRAWN
 346     if ( m_windowStyle & wxLB_OWNERDRAW )
 347     {
 348         //
 349         // First delete old items
 350         //
 351         WX_CLEAR_ARRAY(m_aItems);
 352
 353         //
 354         // Then create new ones
 355         //
 356         for (size_t ui = 0; ui < (size_t)m_nNumItems; ui++)
 357         {
 358             wxOwnerDrawn*           pNewItem = CreateItem(ui);
 359
 360             pNewItem->SetName(raChoices[ui]);
 361             m_aItems.Add(pNewItem);
 362             ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, MPFROMLONG(ui), MPFROMP(pNewItem));
 363         }
 364     }
 365 #endif // wxUSE_OWNER_DRAWN
 366     ::WinShowWindow(GetHwnd(), TRUE);
 367 } // end of wxListBox::DoSetItems
 368
 369 int wxListBox::FindString(
 370   const wxString&                   rsString
 371 ) const
 372 {
 373     int                             nPos;
 374     LONG                            lTextLength;
 375     PSZ                             zStr;
 376
 377
 378     for (nPos = 0; nPos < m_nNumItems; nPos++)
 379     {
 380         lTextLength = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)nPos, (MPARAM)0));
 381         zStr = new char[lTextLength + 1];
 382         ::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXT, MPFROM2SHORT(nPos, (SHORT)lTextLength), (MPARAM)zStr);
 383         if (rsString == (char*)zStr)
 384         {
 385             delete [] zStr;
 386             break;
 387         }
 388         delete [] zStr;
 389     }
 390     return nPos;
 391 } // end of wxListBox::FindString
 392
 393 void wxListBox::Clear()
 394 {
 395 #if wxUSE_OWNER_DRAWN
 396     size_t                          lUiCount = m_aItems.Count();
 397
 398     while (lUiCount-- != 0)
 399     {
 400         delete m_aItems[lUiCount];
 401     }
 402
 403     m_aItems.Clear();
 404 #else // !wxUSE_OWNER_DRAWN
 405     if (HasClientObjectData())
 406     {
 407         for (size_t n = 0; n < (size_t)m_lNumItems; n++)
 408         {
 409             delete GetClientObject(n);
 410         }
 411     }
 412 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 413     ::WinSendMsg(GetHwnd(), LM_DELETEALL, (MPARAM)0, (MPARAM)0);
 414
 415     m_nNumItems = 0;
 416 } // end of wxListBox::Clear
 417
 418 void wxListBox::DoSetSelection(
 419   int                               N
 420 , bool                              bSelect
 421 )
 422 {
 423     wxCHECK_RET( N >= 0 && N < m_nNumItems,
 424                  wxT("invalid index in wxListBox::SetSelection") );
 425     ::WinSendMsg( GetHwnd()
 426                  ,LM_SELECTITEM
 427                  ,MPFROMLONG(N)
 428                  ,(MPARAM)bSelect
 429                 );
 430     if(m_windowStyle & wxLB_OWNERDRAW)
 431         Refresh();
 432 } // end of wxListBox::SetSelection
 433
 434 bool wxListBox::IsSelected(
 435   int                               N
 436 ) const
 437 {
 438     wxCHECK_MSG( N >= 0 && N < m_nNumItems, false,
 439                  wxT("invalid index in wxListBox::Selected") );
 440
 441     LONG                            lItem;
 442
 443     if (GetWindowStyleFlag() & wxLB_EXTENDED)
 444     {
 445         if (N == 0)
 446             lItem = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0));
 447         else
 448             lItem = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)(N - 1), (MPARAM)0));
 449     }
 450     else
 451     {
 452         lItem = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYSELECTION, (MPARAM)LIT_FIRST, (MPARAM)0));
 453     }
 454     return (lItem == (LONG)N && lItem != LIT_NONE);
 455 } // end of wxListBox::IsSelected
 456
 457 wxClientData* wxListBox::DoGetItemClientObject(
 458   int                               n
 459 ) const
 460 {
 461     return (wxClientData *)DoGetItemClientData(n);
 462 }
 463
 464 void* wxListBox::DoGetItemClientData(
 465   int                               n
 466 ) const
 467 {
 468     wxCHECK_MSG( n >= 0 && n < m_nNumItems, NULL,
 469                  wxT("invalid index in wxListBox::GetClientData") );
 470
 471     return((void *)::WinSendMsg(GetHwnd(), LM_QUERYITEMHANDLE, MPFROMLONG(n), (MPARAM)0));
 472 } // end of wxListBox::DoGetItemClientData
 473
 474 void wxListBox::DoSetItemClientObject(
 475   int                               n
 476 , wxClientData*                     pClientData
 477 )
 478 {
 479     DoSetItemClientData( n
 480                         ,pClientData
 481                        );
 482 } // end of wxListBox::DoSetItemClientObject
 483
 484 void wxListBox::DoSetItemClientData(
 485   int                               n
 486 , void*                             pClientData
 487 )
 488 {
 489     wxCHECK_RET( n >= 0 && n < m_nNumItems,
 490                  wxT("invalid index in wxListBox::SetClientData") );
 491
 492 #if wxUSE_OWNER_DRAWN
 493     if ( m_windowStyle & wxLB_OWNERDRAW )
 494     {
 495         //
 496         // Client data must be pointer to wxOwnerDrawn, otherwise we would crash
 497         // in OnMeasure/OnDraw.
 498         //
 499         wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
 500     }
 501 #endif // wxUSE_OWNER_DRAWN
 502
 503     ::WinSendMsg(GetHwnd(), LM_SETITEMHANDLE, MPFROMLONG(n), MPFROMP(pClientData));
 504 } // end of wxListBox::DoSetItemClientData
 505
 506 bool wxListBox::HasMultipleSelection() const
 507 {
 508     return (m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED);
 509 } // end of wxListBox::HasMultipleSelection
 510
 511 int wxListBox::GetSelections(
 512   wxArrayInt&                       raSelections
 513 ) const
 514 {
 515     int                             nCount = 0;
 516     LONG                            lItem;
 517
 518
 519     raSelections.Empty();
 520     if (HasMultipleSelection())
 521     {
 522         lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 523                                         ,LM_QUERYSELECTION
 524                                         ,(MPARAM)LIT_FIRST
 525                                         ,(MPARAM)0
 526                                        )
 527                           );
 528         if (lItem != LIT_NONE)
 529         {
 530             nCount++;
 531             while ((lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 532                                                     ,LM_QUERYSELECTION
 533                                                     ,(MPARAM)lItem
 534                                                     ,(MPARAM)0
 535                                                    )
 536                                       )) != LIT_NONE)
 537             {
 538                 nCount++;
 539             }
 540             raSelections.Alloc(nCount);
 541             lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 542                                             ,LM_QUERYSELECTION
 543                                             ,(MPARAM)LIT_FIRST
 544                                             ,(MPARAM)0
 545                                            )
 546                               );
 547
 548             raSelections.Add((int)lItem);
 549             while ((lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 550                                                     ,LM_QUERYSELECTION
 551                                                     ,(MPARAM)lItem
 552                                                     ,(MPARAM)0
 553                                                    )
 554                                       )) != LIT_NONE)
 555             {
 556                 raSelections.Add((int)lItem);
 557             }
 558             return nCount;
 559         }
 560         return 0;
 561     }
 562     else  // single-selection listbox
 563     {
 564         lItem = LONGFROMMR(::WinSendMsg( GetHwnd()
 565                                         ,LM_QUERYSELECTION
 566                                         ,(MPARAM)LIT_FIRST
 567                                         ,(MPARAM)0
 568                                        )
 569                           );
 570         raSelections.Add((int)lItem);
 571         return 1;
 572     }
 573     return 0;
 574 } // end of wxListBox::GetSelections
 575
 576 int wxListBox::GetSelection() const
 577 {
 578     wxCHECK_MSG( !HasMultipleSelection(),
 579                  -1,
 580                  wxT("GetSelection() can't be used with multiple-selection "
 581                     "listboxes, use GetSelections() instead.") );
 582
 583     return(LONGFROMMR(::WinSendMsg( GetHwnd()
 584                                    ,LM_QUERYSELECTION
 585                                    ,(MPARAM)LIT_FIRST
 586                                    ,(MPARAM)0
 587                                   )
 588                      ));
 589 } // end of wxListBox::GetSelection
 590
 591 wxString wxListBox::GetString(
 592   int                               N
 593 ) const
 594 {
 595     LONG                            lLen = 0;
 596     char*                           zBuf;
 597     wxString                        sResult;
 598
 599     wxCHECK_MSG( N >= 0 && N < m_nNumItems, "",
 600                  wxT("invalid index in wxListBox::GetClientData") );
 601
 602     lLen = LONGFROMMR(::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXTLENGTH, (MPARAM)N, (MPARAM)0));
 603     zBuf = new char[lLen + 1];
 604     ::WinSendMsg(GetHwnd(), LM_QUERYITEMTEXT, MPFROM2SHORT((SHORT)N, (SHORT)lLen), (MPARAM)zBuf);
 605     zBuf[lLen] = '\0';
 606     sResult = zBuf;
 607     delete [] zBuf;
 608     return sResult;
 609 } // end of wxListBox::GetString
 610
 611 void wxListBox::DoInsertItems(
 612   const wxArrayString&              asItems
 613 , int                               nPos
 614 )
 615 {
 616     wxCHECK_RET( nPos >= 0 && nPos <= m_nNumItems,
 617                  wxT("invalid index in wxListBox::InsertItems") );
 618
 619     int                             nItems = asItems.GetCount();
 620
 621     for (int i = 0; i < nItems; i++)
 622     {
 623         int                         nIndex = (int)::WinSendMsg( GetHwnd()
 624                                                                ,LM_INSERTITEM
 625                                                                ,MPFROMLONG((LONG)(i + nPos))
 626                                                                ,(MPARAM)asItems[i].c_str()
 627                                                               );
 628
 629         wxOwnerDrawn*               pNewItem = CreateItem(nIndex);
 630
 631         pNewItem->SetName(asItems[i]);
 632         pNewItem->SetFont(GetFont());
 633         m_aItems.Insert(pNewItem, nIndex);
 634         ::WinSendMsg( GetHwnd()
 635                      ,LM_SETITEMHANDLE
 636                      ,(MPARAM)((LONG)nIndex)
 637                      ,MPFROMP(pNewItem)
 638                     );
 639         m_nNumItems += nItems;
 640     }
 641 } // end of wxListBox::DoInsertItems
 642
 643 void wxListBox::SetString(
 644   int                               N
 645 , const wxString&                   rsString
 646 )
 647 {
 648     wxCHECK_RET( N >= 0 && N < m_nNumItems,
 649                  wxT("invalid index in wxListBox::SetString") );
 650
 651     //
 652     // Remember the state of the item
 653     //
 654     bool                            bWasSelected = IsSelected(N);
 655     void*                           pOldData = NULL;
 656     wxClientData*                   pOldObjData = NULL;
 657
 658     if (m_clientDataItemsType == wxClientData_Void)
 659         pOldData = GetClientData(N);
 660     else if (m_clientDataItemsType == wxClientData_Object)
 661         pOldObjData = GetClientObject(N);
 662
 663     //
 664     // Delete and recreate it
 665     //
 666     ::WinSendMsg( GetHwnd()
 667                  ,LM_DELETEITEM
 668                  ,(MPARAM)N
 669                  ,(MPARAM)0
 670                 );
 671
 672     int                             nNewN = N;
 673
 674     if (N == m_nNumItems - 1)
 675         nNewN = -1;
 676
 677     ::WinSendMsg( GetHwnd()
 678                  ,LM_INSERTITEM
 679                  ,(MPARAM)nNewN
 680                  ,(MPARAM)rsString.c_str()
 681                 );
 682
 683     //
 684     // Restore the client data
 685     //
 686     if (pOldData)
 687         SetClientData( N
 688                       ,pOldData
 689                      );
 690     else if (pOldObjData)
 691         SetClientObject( N
 692                         ,pOldObjData
 693                        );
 694
 695     //
 696     // We may have lost the selection
 697     //
 698     if (bWasSelected)
 699         Select(N);
 700
 701 #if wxUSE_OWNER_DRAWN
 702     if (m_windowStyle & wxLB_OWNERDRAW)
 703         //
 704         // Update item's text
 705         //
 706         m_aItems[N]->SetName(rsString);
 707 #endif  //USE_OWNER_DRAWN
 708 } // end of wxListBox::SetString
 709
 710 int wxListBox::GetCount() const
 711 {
 712     return m_nNumItems;
 713 }
 714
 715 // ----------------------------------------------------------------------------
 716 // helpers
 717 // ----------------------------------------------------------------------------
 718
 719 wxSize wxListBox::DoGetBestSize() const
 720 {
 721     //
 722     // Find the widest string
 723     //
 724     int                             nLine;
 725     int                             nListbox = 0;
 726     int                             nCx;
 727     int                             nCy;
 728
 729     for (int i = 0; i < m_nNumItems; i++)
 730     {
 731         wxString                    vStr(GetString(i));
 732
 733         GetTextExtent( vStr
 734                       ,&nLine
 735                       ,NULL
 736                      );
 737         if (nLine > nListbox)
 738             nListbox = nLine;
 739     }
 740
 741     //
 742     // Give it some reasonable default value if there are no strings in the
 743     // list.
 744     //
 745     if (nListbox == 0)
 746         nListbox = 100;
 747
 748     //
 749     // The listbox should be slightly larger than the widest string
 750     //
 751     wxGetCharSize( GetHWND()
 752                   ,&nCx
 753                   ,&nCy
 754                   ,(wxFont*)&GetFont()
 755                  );
 756     nListbox += 3 * nCx;
 757
 758     int                             hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(nCy) * (wxMax(m_nNumItems, 7));
 759
 760     return wxSize( nListbox
 761                   ,hListbox
 762                  );
 763 } // end of wxListBox::DoGetBestSize
 764
 765 // ----------------------------------------------------------------------------
 766 // callbacks
 767 // ----------------------------------------------------------------------------
 768
 769 bool wxListBox::OS2Command(
 770   WXUINT                            uParam
 771 , WXWORD                            WXUNUSED(wId))
 772 {
 773     wxEventType                     eEvtType;
 774
 775     if (uParam == LN_SELECT)
 776     {
 777         eEvtType = wxEVT_COMMAND_LISTBOX_SELECTED;
 778     }
 779     if (uParam == LN_ENTER)
 780     {
 781         eEvtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
 782     }
 783     else
 784     {
 785         //
 786         // Some event we're not interested in
 787         //
 788         return false;
 789     }
 790     wxCommandEvent                  vEvent( eEvtType
 791                                            ,m_windowId
 792                                           );
 793
 794     vEvent.SetEventObject(this);
 795
 796     wxArrayInt                      aSelections;
 797     int                             n;
 798     int                             nCount = GetSelections(aSelections);
 799
 800     if (nCount > 0)
 801     {
 802         n = aSelections[0];
 803         if (HasClientObjectData())
 804             vEvent.SetClientObject(GetClientObject(n));
 805         else if ( HasClientUntypedData() )
 806             vEvent.SetClientData(GetClientData(n));
 807         vEvent.SetString(GetString(n));
 808     }
 809     else
 810     {
 811         n = -1;
 812     }
 813     vEvent.SetInt(n);
 814     return GetEventHandler()->ProcessEvent(vEvent);
 815 } // end of wxListBox::OS2Command
 816
 817 // ----------------------------------------------------------------------------
 818 // wxCheckListBox support
 819 // ----------------------------------------------------------------------------
 820
 821 #if wxUSE_OWNER_DRAWN
 822
 823 //
 824 // Drawing
 825 // -------
 826 //
 827 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
 828
 829 long wxListBox::OS2OnMeasure(
 830   WXMEASUREITEMSTRUCT*              pItem
 831 )
 832 {
 833     if (!pItem)
 834         pItem = (WXMEASUREITEMSTRUCT*)new OWNERITEM;
 835
 836     POWNERITEM                      pMeasureStruct = (POWNERITEM)pItem;
 837     wxScreenDC                      vDc;
 838
 839     //
 840     // Only owner-drawn control should receive this message
 841     //
 842     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 843
 844     vDc.SetFont(GetFont());
 845
 846     wxCoord                         vHeight;
 847     wxCoord                         vWidth;
 848
 849     GetSize( &vWidth
 850             ,NULL
 851            );
 852
 853     pMeasureStruct->rclItem.xRight = (USHORT)vWidth;
 854     pMeasureStruct->rclItem.xLeft  = 0;
 855     pMeasureStruct->rclItem.yTop   = 0;
 856     pMeasureStruct->rclItem.yBottom = 0;
 857
 858     vHeight = (wxCoord)(vDc.GetCharHeight() * 2.5);
 859     pMeasureStruct->rclItem.yTop  = (USHORT)vHeight;
 860
 861     return long(MRFROM2SHORT((USHORT)vHeight, (USHORT)vWidth));
 862 } // end of wxListBox::OS2OnMeasure
 863
 864 bool wxListBox::OS2OnDraw (
 865   WXDRAWITEMSTRUCT*                 pItem
 866 )
 867 {
 868     POWNERITEM                      pDrawStruct = (POWNERITEM)pItem;
 869     LONG                            lItemID = pDrawStruct->idItem;
 870     int                             eAction = 0;
 871     int                             eStatus = 0;
 872
 873     //
 874     // Only owner-drawn control should receive this message
 875     //
 876     wxCHECK(((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), false);
 877
 878
 879     //
 880     // The item may be -1 for an empty listbox
 881     //
 882     if (lItemID == -1L)
 883         return false;
 884
 885     wxListBoxItem*                   pData = (wxListBoxItem*)PVOIDFROMMR( ::WinSendMsg( GetHwnd()
 886                                                                                        ,LM_QUERYITEMHANDLE
 887                                                                                        ,MPFROMLONG(pDrawStruct->idItem)
 888                                                                                        ,(MPARAM)0
 889                                                                                       )
 890                                                                         );
 891
 892     wxCHECK(pData, false );
 893
 894     wxDC                              vDc;
 895     wxRect                            vRect( wxPoint( pDrawStruct->rclItem.xLeft
 896                                                      ,pDrawStruct->rclItem.yTop
 897                                                     )
 898                                             ,wxPoint( pDrawStruct->rclItem.xRight
 899                                                      ,pDrawStruct->rclItem.yBottom
 900                                                     )
 901                                            );
 902
 903     vDc.SetHPS(pDrawStruct->hps);
 904
 905     if (pDrawStruct->fsAttribute == pDrawStruct->fsAttributeOld)
 906     {
 907         //
 908         // Entire Item needs to be redrawn (either it has reappeared from
 909         // behind another window or is being displayed for the first time
 910         //
 911         eAction = wxOwnerDrawn::wxODDrawAll;
 912
 913         if (pDrawStruct->fsAttribute & MIA_HILITED)
 914         {
 915             //
 916             // If it is currently selected we let the system handle it
 917             //
 918             eStatus |= wxOwnerDrawn::wxODSelected;
 919         }
 920         if (pDrawStruct->fsAttribute & MIA_CHECKED)
 921         {
 922             //
 923             // If it is currently checked we draw our own
 924             //
 925             eStatus |= wxOwnerDrawn::wxODChecked;
 926             pDrawStruct->fsAttributeOld = pDrawStruct->fsAttribute &= ~MIA_CHECKED;
 927         }
 928         if (pDrawStruct->fsAttribute & MIA_DISABLED)
 929         {
 930             //
 931             // If it is currently disabled we let the system handle it
 932             //
 933             eStatus |= wxOwnerDrawn::wxODDisabled;
 934         }
 935         //
 936         // Don't really care about framed (indicationg focus) or NoDismiss
 937         //
 938     }
 939     else
 940     {
 941         if (pDrawStruct->fsAttribute & MIA_HILITED)
 942         {
 943             eAction = wxOwnerDrawn::wxODDrawAll;
 944             eStatus |= wxOwnerDrawn::wxODSelected;
 945             //
 946             // Keep the system from trying to highlight with its bogus colors
 947             //
 948             pDrawStruct->fsAttributeOld = pDrawStruct->fsAttribute &= ~MIA_HILITED;
 949         }
 950         else if (!(pDrawStruct->fsAttribute & MIA_HILITED))
 951         {
 952             eAction = wxOwnerDrawn::wxODDrawAll;
 953             eStatus = 0;
 954             //
 955             // Keep the system from trying to highlight with its bogus colors
 956             //
 957             pDrawStruct->fsAttribute = pDrawStruct->fsAttributeOld &= ~MIA_HILITED;
 958         }
 959         else
 960         {
 961             //
 962             // For now we don't care about anything else
 963             // just ignore the entire message!
 964             //
 965             return true;
 966         }
 967     }
 968     return pData->OnDrawItem( vDc
 969                              ,vRect
 970                              ,(wxOwnerDrawn::wxODAction)eAction
 971                              ,(wxOwnerDrawn::wxODStatus)eStatus
 972                             );
 973 } // end of wxListBox::OS2OnDraw
 974
 975 #endif // ndef for wxUSE_OWNER_DRAWN
 976
 977 #endif // ndef for wxUSE_LISTBOX
 978