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/utils.h"
  25 #endif
  26
  27 #define INCL_M
  28 #include <os2.h>
  29
  30 #include "wx/dynarray.h"
  31 #include "wx/log.h"
  32
  33 #if wxUSE_OWNER_DRAWN
  34     #include  "wx/ownerdrw.h"
  35 #endif
  36
  37 #if !USE_SHARED_LIBRARY
  38   IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
  39 #endif
  40
  41 // ============================================================================
  42 // list box item declaration and implementation
  43 // ============================================================================
  44
  45 #if wxUSE_OWNER_DRAWN
  46
  47 class wxListBoxItem : public wxOwnerDrawn
  48 {
  49 public:
  50     wxListBoxItem(const wxString& str = "");
  51 };
  52
  53 wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
  54 {
  55     // no bitmaps/checkmarks
  56     SetMarginWidth(0);
  57 }
  58
  59 wxOwnerDrawn *wxListBox::CreateItem(size_t n)
  60 {
  61     return new wxListBoxItem();
  62 }
  63
  64 #endif  //USE_OWNER_DRAWN
  65
  66 // ============================================================================
  67 // list box control implementation
  68 // ============================================================================
  69
  70 // Listbox item
  71 wxListBox::wxListBox()
  72 {
  73     m_noItems = 0;
  74     m_selected = 0;
  75 }
  76
  77 bool wxListBox::Create(wxWindow *parent,
  78                        wxWindowID id,
  79                        const wxPoint& pos,
  80                        const wxSize& size,
  81                        int n, const wxString choices[],
  82                        long style,
  83                        const wxValidator& validator,
  84                        const wxString& name)
  85 {
  86     m_noItems = 0;
  87     m_hWnd = 0;
  88     m_selected = 0;
  89
  90     SetName(name);
  91     SetValidator(validator);
  92
  93     if (parent)
  94         parent->AddChild(this);
  95
  96     wxSystemSettings settings;
  97     SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
  98     SetForegroundColour(parent->GetForegroundColour());
  99
 100     m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
 101
 102     int x = pos.x;
 103     int y = pos.y;
 104     int width = size.x;
 105     int height = size.y;
 106     m_windowStyle = style;
 107
 108 // TODO:
 109 /*
 110     DWORD wstyle = WS_VISIBLE | WS_VSCROLL | WS_TABSTOP |
 111                    LBS_NOTIFY | LBS_HASSTRINGS;
 112     if (m_windowStyle & wxLB_MULTIPLE)
 113         wstyle |= LBS_MULTIPLESEL;
 114     else if (m_windowStyle & wxLB_EXTENDED)
 115         wstyle |= LBS_EXTENDEDSEL;
 116
 117     if (m_windowStyle & wxLB_ALWAYS_SB)
 118         wstyle |= LBS_DISABLENOSCROLL;
 119     if (m_windowStyle & wxLB_HSCROLL)
 120         wstyle |= WS_HSCROLL;
 121     if (m_windowStyle & wxLB_SORT)
 122         wstyle |= LBS_SORT;
 123
 124 #if wxUSE_OWNER_DRAWN
 125     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 126         // we don't support LBS_OWNERDRAWVARIABLE yet
 127         wstyle |= LBS_OWNERDRAWFIXED;
 128     }
 129 #endif
 130
 131     // Without this style, you get unexpected heights, so e.g. constraint layout
 132     // doesn't work properly
 133     wstyle |= LBS_NOINTEGRALHEIGHT;
 134
 135     bool want3D;
 136     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 137
 138     // Even with extended styles, need to combine with WS_BORDER for them to
 139     // look right.
 140     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 141     {
 142         wstyle |= WS_BORDER;
 143     }
 144
 145     m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("LISTBOX"), NULL,
 146             wstyle | WS_CHILD,
 147             0, 0, 0, 0,
 148             (HWND)parent->GetHWND(), (HMENU)m_windowId,
 149             wxGetInstance(), NULL);
 150
 151     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create listbox") );
 152
 153     // Subclass again to catch messages
 154     SubclassWin(m_hWnd);
 155
 156     size_t ui;
 157     for (ui = 0; ui < (size_t)n; ui++) {
 158         Append(choices[ui]);
 159     }
 160
 161     if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
 162         SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
 163 */
 164     SetFont(parent->GetFont());
 165
 166     SetSize(x, y, width, height);
 167
 168     Show(TRUE);
 169
 170     return TRUE;
 171 }
 172
 173 wxListBox::~wxListBox()
 174 {
 175 #if wxUSE_OWNER_DRAWN
 176     size_t uiCount = m_aItems.Count();
 177     while ( uiCount-- != 0 ) {
 178         delete m_aItems[uiCount];
 179     }
 180 #endif // wxUSE_OWNER_DRAWN
 181 }
 182
 183 void wxListBox::SetupColours()
 184 {
 185     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 186     SetForegroundColour(GetParent()->GetForegroundColour());
 187 }
 188
 189 // ----------------------------------------------------------------------------
 190 // implementation of wxListBoxBase methods
 191 // ----------------------------------------------------------------------------
 192
 193 void wxListBox::DoSetFirstItem(int N)
 194 {
 195     wxCHECK_RET( N >= 0 && N < m_noItems,
 196                  wxT("invalid index in wxListBox::SetFirstItem") );
 197
 198 //    SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
 199 }
 200
 201 void wxListBox::Delete(int N)
 202 {
 203     wxCHECK_RET( N >= 0 && N < m_noItems,
 204                  wxT("invalid index in wxListBox::Delete") );
 205
 206 #if wxUSE_OWNER_DRAWN
 207     delete m_aItems[N];
 208     m_aItems.Remove(N);
 209 #else // !wxUSE_OWNER_DRAWN
 210     if ( HasClientObjectData() )
 211     {
 212         delete GetClientObject(N);
 213     }
 214 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 215
 216 //    SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
 217     m_noItems--;
 218
 219     SetHorizontalExtent("");
 220 }
 221
 222 int wxListBox::DoAppend(const wxString& item)
 223 {
 224 // TODO:
 225 /*
 226     int index = ListBox_AddString(GetHwnd(), item);
 227     m_noItems++;
 228
 229 #if wxUSE_OWNER_DRAWN
 230     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 231         wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
 232         pNewItem->SetName(item);
 233         m_aItems.Add(pNewItem);
 234         ListBox_SetItemData(GetHwnd(), index, pNewItem);
 235     }
 236 #endif
 237
 238     SetHorizontalExtent(item);
 239
 240     return index;
 241 */
 242     return 0;
 243 }
 244
 245 void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
 246 {
 247 // TODO:
 248 /*
 249     ShowWindow(GetHwnd(), SW_HIDE);
 250
 251     ListBox_ResetContent(GetHwnd());
 252
 253     m_noItems = choices.GetCount();
 254     int i;
 255     for (i = 0; i < m_noItems; i++)
 256     {
 257         ListBox_AddString(GetHwnd(), choices[i]);
 258         if ( clientData )
 259         {
 260 #if wxUSE_OWNER_DRAWN
 261             wxASSERT_MSG(clientData[ui] == NULL,
 262                          wxT("Can't use client data with owner-drawn listboxes"));
 263 #else // !wxUSE_OWNER_DRAWN
 264             ListBox_SetItemData(GetHwnd(), i, clientData[i]);
 265 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 266         }
 267     }
 268
 269 #if wxUSE_OWNER_DRAWN
 270     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 271         // first delete old items
 272         size_t ui = m_aItems.Count();
 273         while ( ui-- != 0 ) {
 274             delete m_aItems[ui];
 275         }
 276         m_aItems.Empty();
 277
 278         // then create new ones
 279         for ( ui = 0; ui < (size_t)m_noItems; ui++ ) {
 280             wxOwnerDrawn *pNewItem = CreateItem(ui);
 281             pNewItem->SetName(choices[ui]);
 282             m_aItems.Add(pNewItem);
 283             ListBox_SetItemData(GetHwnd(), ui, pNewItem);
 284         }
 285     }
 286 #endif // wxUSE_OWNER_DRAWN
 287
 288     SetHorizontalExtent();
 289
 290     ShowWindow(GetHwnd(), SW_SHOW);
 291 */
 292 }
 293
 294 int wxListBox::FindString(const wxString& s) const
 295 {
 296 // TODO:
 297 /*
 298     int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
 299     if (pos == LB_ERR)
 300         return wxNOT_FOUND;
 301     else
 302         return pos;
 303 */
 304     return 0;
 305 }
 306
 307 void wxListBox::Clear()
 308 {
 309 #if wxUSE_OWNER_DRAWN
 310     size_t uiCount = m_aItems.Count();
 311     while ( uiCount-- != 0 ) {
 312         delete m_aItems[uiCount];
 313     }
 314
 315     m_aItems.Clear();
 316 #else // !wxUSE_OWNER_DRAWN
 317     if ( HasClientObjectData() )
 318     {
 319         for ( size_t n = 0; n < (size_t)m_noItems; n++ )
 320         {
 321             delete GetClientObject(n);
 322         }
 323     }
 324 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 325 // TODO:
 326 /*
 327
 328     ListBox_ResetContent(GetHwnd());
 329
 330     m_noItems = 0;
 331     SetHorizontalExtent();
 332 */
 333 }
 334
 335 void wxListBox::SetSelection(int N, bool select)
 336 {
 337     wxCHECK_RET( N >= 0 && N < m_noItems,
 338                  wxT("invalid index in wxListBox::SetSelection") );
 339 // TODO:
 340 /*
 341
 342     if ( HasMultipleSelection() )
 343     {
 344         SendMessage(GetHwnd(), LB_SETSEL, select, N);
 345     }
 346     else
 347     {
 348         SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
 349     }
 350 */
 351 }
 352
 353 bool wxListBox::IsSelected(int N) const
 354 {
 355     wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
 356                  wxT("invalid index in wxListBox::Selected") );
 357
 358 //    return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
 359     return FALSE;
 360 }
 361
 362 wxClientData* wxListBox::DoGetItemClientObject(int n) const
 363 {
 364     return (wxClientData *)DoGetItemClientData(n);
 365 }
 366
 367 void *wxListBox::DoGetItemClientData(int n) const
 368 {
 369     wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
 370                  wxT("invalid index in wxListBox::GetClientData") );
 371
 372 //    return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
 373     return NULL;
 374 }
 375
 376 void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
 377 {
 378     DoSetItemClientData(n, clientData);
 379 }
 380
 381 void wxListBox::DoSetItemClientData(int n, void *clientData)
 382 {
 383     wxCHECK_RET( n >= 0 && n < m_noItems,
 384                  wxT("invalid index in wxListBox::SetClientData") );
 385
 386 #if wxUSE_OWNER_DRAWN
 387     if ( m_windowStyle & wxLB_OWNERDRAW )
 388     {
 389         // client data must be pointer to wxOwnerDrawn, otherwise we would crash
 390         // in OnMeasure/OnDraw.
 391         wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
 392     }
 393 #endif // wxUSE_OWNER_DRAWN
 394
 395 // TODO:
 396 /*
 397     if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
 398         wxLogDebug(wxT("LB_SETITEMDATA failed"));
 399 */
 400 }
 401
 402 bool wxListBox::HasMultipleSelection() const
 403 {
 404     return (m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED);
 405 }
 406
 407 // Return number of selections and an array of selected integers
 408 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 409 {
 410     aSelections.Empty();
 411
 412 // TODO:
 413 /*
 414     if ( HasMultipleSelection() )
 415     {
 416         int no_sel = ListBox_GetSelCount(GetHwnd());
 417         if (no_sel != 0) {
 418             int *selections = new int[no_sel];
 419             int rc = ListBox_GetSelItems(GetHwnd(), no_sel, selections);
 420
 421             wxCHECK_MSG(rc != LB_ERR, -1, wxT("ListBox_GetSelItems failed"));
 422
 423             aSelections.Alloc(no_sel);
 424             for ( int n = 0; n < no_sel; n++ )
 425                 aSelections.Add(selections[n]);
 426
 427             delete [] selections;
 428         }
 429
 430         return no_sel;
 431     }
 432     else  // single-selection listbox
 433     {
 434         aSelections.Add(ListBox_GetCurSel(GetHwnd()));
 435
 436         return 1;
 437     }
 438 */
 439     return 0;
 440 }
 441
 442 // Get single selection, for single choice list items
 443 int wxListBox::GetSelection() const
 444 {
 445     wxCHECK_MSG( !HasMultipleSelection(),
 446                  -1,
 447                  wxT("GetSelection() can't be used with multiple-selection "
 448                     "listboxes, use GetSelections() instead.") );
 449
 450 //    return ListBox_GetCurSel(GetHwnd());
 451     return 0;
 452 }
 453
 454 // Find string for position
 455 wxString wxListBox::GetString(int N) const
 456 {
 457     wxCHECK_MSG( N >= 0 && N < m_noItems, "",
 458                  wxT("invalid index in wxListBox::GetClientData") );
 459
 460 // TODO:
 461 /*
 462     int len = ListBox_GetTextLen(GetHwnd(), N);
 463
 464     // +1 for terminating NUL
 465     wxString result;
 466     ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
 467     result.UngetWriteBuf();
 468
 469     return result;
 470 */
 471     return((wxString)"");
 472 }
 473
 474 void
 475 wxListBox::DoInsertItems(const wxArrayString& items, int pos)
 476 {
 477     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 478                  wxT("invalid index in wxListBox::InsertItems") );
 479
 480 // TODO:
 481 /*
 482     int nItems = items.GetCount();
 483     for ( int i = 0; i < nItems; i++ )
 484         ListBox_InsertString(GetHwnd(), i + pos, items[i]);
 485     m_noItems += nItems;
 486
 487     SetHorizontalExtent();
 488 */
 489 }
 490
 491 void wxListBox::SetString(int N, const wxString& s)
 492 {
 493     wxCHECK_RET( N >= 0 && N < m_noItems,
 494                  wxT("invalid index in wxListBox::SetString") );
 495
 496     // remember the state of the item
 497     bool wasSelected = IsSelected(N);
 498
 499     void *oldData = NULL;
 500     wxClientData *oldObjData = NULL;
 501     if ( m_clientDataItemsType == ClientData_Void )
 502         oldData = GetClientData(N);
 503     else if ( m_clientDataItemsType == ClientData_Object )
 504         oldObjData = GetClientObject(N);
 505 // TODO:
 506 /*
 507
 508     // delete and recreate it
 509     SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
 510
 511     int newN = N;
 512     if ( N == m_noItems - 1 )
 513         newN = -1;
 514
 515     ListBox_InsertString(GetHwnd(), newN, s);
 516
 517     // restore the client data
 518     if ( oldData )
 519         SetClientData(N, oldData);
 520     else if ( oldObjData )
 521         SetClientObject(N, oldObjData);
 522
 523     // we may have lost the selection
 524     if ( wasSelected )
 525         Select(N);
 526
 527 #if wxUSE_OWNER_DRAWN
 528     if ( m_windowStyle & wxLB_OWNERDRAW )
 529         // update item's text
 530         m_aItems[N]->SetName(s);
 531 #endif  //USE_OWNER_DRAWN
 532 */
 533 }
 534
 535 int wxListBox::GetCount() const
 536 {
 537     return m_noItems;
 538 }
 539
 540 // ----------------------------------------------------------------------------
 541 // helpers
 542 // ----------------------------------------------------------------------------
 543
 544 // Windows-specific code to set the horizontal extent of the listbox, if
 545 // necessary. If s is non-NULL, it's used to calculate the horizontal extent.
 546 // Otherwise, all strings are used.
 547 void wxListBox::SetHorizontalExtent(const wxString& s)
 548 {
 549 // TODO:
 550 /*
 551     // Only necessary if we want a horizontal scrollbar
 552     if (!(m_windowStyle & wxHSCROLL))
 553         return;
 554     TEXTMETRIC lpTextMetric;
 555
 556     if ( !s.IsEmpty() )
 557     {
 558         int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
 559         HDC dc = GetWindowDC(GetHwnd());
 560         HFONT oldFont = 0;
 561         if (GetFont().Ok() && GetFont().GetResourceHandle())
 562             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 563
 564         GetTextMetrics(dc, &lpTextMetric);
 565         SIZE extentXY;
 566         ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
 567         int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 568
 569         if (oldFont)
 570             ::SelectObject(dc, oldFont);
 571
 572         ReleaseDC(GetHwnd(), dc);
 573         if (extentX > existingExtent)
 574             SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
 575     }
 576     else
 577     {
 578         int largestExtent = 0;
 579         HDC dc = GetWindowDC(GetHwnd());
 580         HFONT oldFont = 0;
 581         if (GetFont().Ok() && GetFont().GetResourceHandle())
 582             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 583
 584         GetTextMetrics(dc, &lpTextMetric);
 585         int i;
 586         for (i = 0; i < m_noItems; i++)
 587         {
 588             int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
 589             wxBuffer[len] = 0;
 590             SIZE extentXY;
 591             ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
 592             int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 593             if (extentX > largestExtent)
 594                 largestExtent = extentX;
 595         }
 596         if (oldFont)
 597             ::SelectObject(dc, oldFont);
 598
 599         ReleaseDC(GetHwnd(), dc);
 600         SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
 601     }
 602 */
 603 }
 604
 605 wxSize wxListBox::DoGetBestSize()
 606 {
 607     // find the widest string
 608     int wLine;
 609     int wListbox = 0;
 610     for ( int i = 0; i < m_noItems; i++ )
 611     {
 612         wxString str(GetString(i));
 613         GetTextExtent(str, &wLine, NULL);
 614         if ( wLine > wListbox )
 615             wListbox = wLine;
 616     }
 617
 618     // give it some reasonable default value if there are no strings in the
 619     // list
 620     if ( wListbox == 0 )
 621         wListbox = 100;
 622
 623     // the listbox should be slightly larger than the widest string
 624     int cx, cy;
 625     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 626
 627     wListbox += 3*cx;
 628
 629     int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*(wxMax(m_noItems, 7));
 630
 631     return wxSize(wListbox, hListbox);
 632 }
 633
 634 // ----------------------------------------------------------------------------
 635 // callbacks
 636 // ----------------------------------------------------------------------------
 637
 638 bool wxListBox::OS2Command(WXUINT param, WXWORD WXUNUSED(id))
 639 {
 640     /*
 641        if (param == LBN_SELCANCEL)
 642        {
 643        event.extraLong = FALSE;
 644        }
 645      */
 646 // TODO:
 647 /*
 648     if (param == LBN_SELCHANGE)
 649     {
 650         wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
 651         wxArrayInt aSelections;
 652         int count = GetSelections(aSelections);
 653         if ( count > 0 )
 654         {
 655             event.m_commandInt = aSelections[0];
 656             event.m_clientData = GetClientData(event.m_commandInt);
 657             wxString str(GetString(event.m_commandInt));
 658             if (str != wxT(""))
 659             {
 660                 event.m_commandString = str;
 661             }
 662         }
 663         else
 664         {
 665             event.m_commandInt = -1;
 666             event.m_commandString.Empty();
 667         }
 668
 669         event.SetEventObject( this );
 670         ProcessCommand(event);
 671         return TRUE;
 672     }
 673     else if (param == LBN_DBLCLK)
 674     {
 675         wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
 676         event.SetEventObject( this );
 677         GetEventHandler()->ProcessEvent(event);
 678         return TRUE;
 679     }
 680 */
 681     return FALSE;
 682 }
 683
 684 WXHBRUSH wxListBox::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 685                                WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 686 {
 687 // TODO:
 688 /*
 689     if (GetParent()->GetTransparentBackground())
 690         SetBkMode((HDC) pDC, TRANSPARENT);
 691     else
 692         SetBkMode((HDC) pDC, OPAQUE);
 693
 694     ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 695     ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 696
 697     wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 698
 699     // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 700     // has a zero usage count.
 701     backgroundBrush->RealizeResource();
 702     return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 703 */
 704     return (WXHBRUSH)0;
 705 }
 706
 707 // ----------------------------------------------------------------------------
 708 // wxCheckListBox support
 709 // ----------------------------------------------------------------------------
 710
 711 #if wxUSE_OWNER_DRAWN
 712
 713 // drawing
 714 // -------
 715
 716 // space beneath/above each row in pixels
 717 // "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
 718 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
 719
 720 // the height is the same for all items
 721 // TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
 722
 723 // NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
 724 //     message is not yet sent when we get here!
 725 bool wxListBox::OS2OnMeasure(WXMEASUREITEMSTRUCT *item)
 726 {
 727 // TODO:
 728 /*
 729     // only owner-drawn control should receive this message
 730     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 731
 732     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 733
 734     wxDC dc;
 735     dc.SetHDC((WXHDC)CreateIC(wxT("DISPLAY"), NULL, NULL, 0));
 736     dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
 737
 738     pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
 739     pStruct->itemWidth  = dc.GetCharWidth();
 740
 741     return TRUE;
 742 */
 743     return TRUE;
 744 }
 745
 746 // forward the message to the appropriate item
 747 bool wxListBox::OS2OnDraw(WXDRAWITEMSTRUCT *item)
 748 {
 749 // TODO:
 750 /*
 751     // only owner-drawn control should receive this message
 752     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 753
 754     DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
 755
 756     long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
 757
 758     wxCHECK( data && (data != LB_ERR), FALSE );
 759
 760     wxListBoxItem *pItem = (wxListBoxItem *)data;
 761
 762     wxDC dc;
 763     dc.SetHDC((WXHDC)pStruct->hDC, FALSE);
 764     wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
 765             wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
 766
 767     return pItem->OnDrawItem(dc, rect,
 768             (wxOwnerDrawn::wxODAction)pStruct->itemAction,
 769             (wxOwnerDrawn::wxODStatus)pStruct->itemState);
 770 */
 771     return FALSE;
 772 }
 773 #endif
 774     // wxUSE_OWNER_DRAWN