src/msw/listbox.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/listbox.cpp
   3 // Purpose:     wxListBox
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin (owner drawn stuff)
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
  13     #pragma implementation "listbox.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20     #pragma hdrstop
  21 #endif
  22
  23 #if wxUSE_LISTBOX
  24
  25 #ifndef WX_PRECOMP
  26 #include "wx/listbox.h"
  27 #include "wx/settings.h"
  28 #include "wx/brush.h"
  29 #include "wx/font.h"
  30 #include "wx/dc.h"
  31 #include "wx/utils.h"
  32 #endif
  33
  34 #include "wx/window.h"
  35 #include "wx/msw/private.h"
  36
  37 #include <windowsx.h>
  38
  39 #include "wx/dynarray.h"
  40 #include "wx/log.h"
  41
  42 #if wxUSE_OWNER_DRAWN
  43     #include  "wx/ownerdrw.h"
  44 #endif
  45
  46 #ifdef __GNUWIN32_OLD__
  47     #include "wx/msw/gnuwin32/extra.h"
  48 #endif
  49
  50 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
  51
  52 /*
  53 TODO PROPERTIES
  54         selection
  55         content
  56                 item
  57 */
  58
  59 // ============================================================================
  60 // list box item declaration and implementation
  61 // ============================================================================
  62
  63 #if wxUSE_OWNER_DRAWN
  64
  65 class wxListBoxItem : public wxOwnerDrawn
  66 {
  67 public:
  68     wxListBoxItem(const wxString& str = wxEmptyString);
  69 };
  70
  71 wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
  72 {
  73     // no bitmaps/checkmarks
  74     SetMarginWidth(0);
  75 }
  76
  77 wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n))
  78 {
  79     return new wxListBoxItem();
  80 }
  81
  82 #endif  //USE_OWNER_DRAWN
  83
  84 // ============================================================================
  85 // list box control implementation
  86 // ============================================================================
  87
  88 // ----------------------------------------------------------------------------
  89 // creation
  90 // ----------------------------------------------------------------------------
  91
  92 // Listbox item
  93 wxListBox::wxListBox()
  94 {
  95     m_noItems = 0;
  96     m_selected = 0;
  97 }
  98
  99 bool wxListBox::Create(wxWindow *parent,
 100                        wxWindowID id,
 101                        const wxPoint& pos,
 102                        const wxSize& size,
 103                        int n, const wxString choices[],
 104                        long style,
 105                        const wxValidator& validator,
 106                        const wxString& name)
 107 {
 108     m_noItems = 0;
 109     m_hWnd = 0;
 110     m_selected = 0;
 111
 112     SetName(name);
 113 #if wxUSE_VALIDATORS
 114     SetValidator(validator);
 115 #endif // wxUSE_VALIDATORS
 116
 117     if (parent)
 118         parent->AddChild(this);
 119
 120     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 121     SetForegroundColour(parent->GetForegroundColour());
 122
 123     m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
 124
 125     int x = pos.x;
 126     int y = pos.y;
 127     int width = size.x;
 128     int height = size.y;
 129     m_windowStyle = style;
 130
 131     DWORD wstyle = WS_VISIBLE | WS_CHILD | WS_VSCROLL | WS_TABSTOP |
 132                    LBS_NOTIFY | LBS_HASSTRINGS ;
 133
 134     wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED),
 135                   _T("only one of listbox selection modes can be specified") );
 136
 137     if ( (m_windowStyle & wxBORDER_MASK) == wxBORDER_DEFAULT )
 138         m_windowStyle |= wxBORDER_SUNKEN;
 139
 140     if ( m_windowStyle & wxCLIP_SIBLINGS )
 141         wstyle |= WS_CLIPSIBLINGS;
 142
 143     if (m_windowStyle & wxLB_MULTIPLE)
 144         wstyle |= LBS_MULTIPLESEL;
 145     else if (m_windowStyle & wxLB_EXTENDED)
 146         wstyle |= LBS_EXTENDEDSEL;
 147
 148     if (m_windowStyle & wxLB_ALWAYS_SB)
 149         wstyle |= LBS_DISABLENOSCROLL;
 150     if (m_windowStyle & wxLB_HSCROLL)
 151         wstyle |= WS_HSCROLL;
 152     if (m_windowStyle & wxLB_SORT)
 153         wstyle |= LBS_SORT;
 154
 155 #if wxUSE_OWNER_DRAWN && !defined(__WXWINCE__)
 156     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 157         // we don't support LBS_OWNERDRAWVARIABLE yet
 158         wstyle |= LBS_OWNERDRAWFIXED;
 159     }
 160 #endif
 161
 162     // Without this style, you get unexpected heights, so e.g. constraint layout
 163     // doesn't work properly
 164     wstyle |= LBS_NOINTEGRALHEIGHT;
 165
 166     WXDWORD exStyle = 0;
 167     (void) MSWGetStyle(m_windowStyle, & exStyle) ;
 168
 169     m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("LISTBOX"), NULL,
 170             wstyle ,
 171             0, 0, 0, 0,
 172             (HWND)parent->GetHWND(), (HMENU)m_windowId,
 173             wxGetInstance(), NULL);
 174
 175     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create listbox") );
 176
 177     // Subclass again to catch messages
 178     SubclassWin(m_hWnd);
 179
 180     size_t ui;
 181     for (ui = 0; ui < (size_t)n; ui++) {
 182         Append(choices[ui]);
 183     }
 184
 185     if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
 186         SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
 187
 188     SetFont(parent->GetFont());
 189
 190     SetSize(x, y, width, height);
 191
 192     return TRUE;
 193 }
 194
 195 wxListBox::~wxListBox()
 196 {
 197     Free();
 198 }
 199
 200 void wxListBox::SetupColours()
 201 {
 202     SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
 203     SetForegroundColour(GetParent()->GetForegroundColour());
 204 }
 205
 206 // ----------------------------------------------------------------------------
 207 // implementation of wxListBoxBase methods
 208 // ----------------------------------------------------------------------------
 209
 210 void wxListBox::DoSetFirstItem(int N)
 211 {
 212     wxCHECK_RET( N >= 0 && N < m_noItems,
 213                  wxT("invalid index in wxListBox::SetFirstItem") );
 214
 215     SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
 216 }
 217
 218 void wxListBox::Delete(int N)
 219 {
 220     wxCHECK_RET( N >= 0 && N < m_noItems,
 221                  wxT("invalid index in wxListBox::Delete") );
 222
 223     // for owner drawn objects, the data is used for storing wxOwnerDrawn
 224     // pointers and we shouldn't touch it
 225 #if !wxUSE_OWNER_DRAWN
 226     if ( !(m_windowStyle & wxLB_OWNERDRAW) )
 227 #endif // !wxUSE_OWNER_DRAWN
 228         if ( HasClientObjectData() )
 229         {
 230             delete GetClientObject(N);
 231         }
 232
 233     SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
 234     m_noItems--;
 235
 236     SetHorizontalExtent(wxEmptyString);
 237 }
 238
 239 int wxListBox::DoAppend(const wxString& item)
 240 {
 241     int index = ListBox_AddString(GetHwnd(), item);
 242     m_noItems++;
 243
 244 #if wxUSE_OWNER_DRAWN
 245     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 246         wxOwnerDrawn *pNewItem = CreateLboxItem(index); // dummy argument
 247         pNewItem->SetName(item);
 248         m_aItems.Insert(pNewItem, index);
 249         ListBox_SetItemData(GetHwnd(), index, pNewItem);
 250         pNewItem->SetFont(GetFont());
 251     }
 252 #endif // wxUSE_OWNER_DRAWN
 253
 254     SetHorizontalExtent(item);
 255
 256     return index;
 257 }
 258
 259 void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
 260 {
 261     // avoid flicker - but don't need to do this for a hidden listbox
 262     bool hideAndShow = IsShown();
 263     if ( hideAndShow )
 264     {
 265         ShowWindow(GetHwnd(), SW_HIDE);
 266     }
 267
 268     ListBox_ResetContent(GetHwnd());
 269
 270     m_noItems = choices.GetCount();
 271     int i;
 272     for (i = 0; i < m_noItems; i++)
 273     {
 274         ListBox_AddString(GetHwnd(), choices[i]);
 275         if ( clientData )
 276         {
 277             SetClientData(i, clientData[i]);
 278         }
 279     }
 280
 281 #if wxUSE_OWNER_DRAWN
 282     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 283         // first delete old items
 284         WX_CLEAR_ARRAY(m_aItems);
 285
 286         // then create new ones
 287         for ( size_t ui = 0; ui < (size_t)m_noItems; ui++ ) {
 288             wxOwnerDrawn *pNewItem = CreateLboxItem(ui);
 289             pNewItem->SetName(choices[ui]);
 290             m_aItems.Add(pNewItem);
 291             ListBox_SetItemData(GetHwnd(), ui, pNewItem);
 292         }
 293     }
 294 #endif // wxUSE_OWNER_DRAWN
 295
 296     SetHorizontalExtent();
 297
 298     if ( hideAndShow )
 299     {
 300         // show the listbox back if we hid it
 301         ShowWindow(GetHwnd(), SW_SHOW);
 302     }
 303 }
 304
 305 int wxListBox::FindString(const wxString& s) const
 306 {
 307     int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
 308     if (pos == LB_ERR)
 309         return wxNOT_FOUND;
 310     else
 311         return pos;
 312 }
 313
 314 void wxListBox::Clear()
 315 {
 316     Free();
 317
 318     ListBox_ResetContent(GetHwnd());
 319
 320     m_noItems = 0;
 321     SetHorizontalExtent();
 322 }
 323
 324 void wxListBox::Free()
 325 {
 326 #if wxUSE_OWNER_DRAWN
 327     if ( m_windowStyle & wxLB_OWNERDRAW )
 328     {
 329         WX_CLEAR_ARRAY(m_aItems);
 330     }
 331     else
 332 #endif // wxUSE_OWNER_DRAWN
 333     if ( HasClientObjectData() )
 334     {
 335         for ( size_t n = 0; n < (size_t)m_noItems; n++ )
 336         {
 337             delete GetClientObject(n);
 338         }
 339     }
 340 }
 341
 342 void wxListBox::SetSelection(int N, bool select)
 343 {
 344     wxCHECK_RET( N >= 0 && N < m_noItems,
 345                  wxT("invalid index in wxListBox::SetSelection") );
 346
 347     if ( HasMultipleSelection() )
 348     {
 349         SendMessage(GetHwnd(), LB_SETSEL, select, N);
 350     }
 351     else
 352     {
 353         SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
 354     }
 355 }
 356
 357 bool wxListBox::IsSelected(int N) const
 358 {
 359     wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
 360                  wxT("invalid index in wxListBox::Selected") );
 361
 362     return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
 363 }
 364
 365 wxClientData* wxListBox::DoGetItemClientObject(int n) const
 366 {
 367     return (wxClientData *)DoGetItemClientData(n);
 368 }
 369
 370 void *wxListBox::DoGetItemClientData(int n) const
 371 {
 372     wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
 373                  wxT("invalid index in wxListBox::GetClientData") );
 374
 375     return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
 376 }
 377
 378 void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
 379 {
 380     DoSetItemClientData(n, clientData);
 381 }
 382
 383 void wxListBox::DoSetItemClientData(int n, void *clientData)
 384 {
 385     wxCHECK_RET( n >= 0 && n < m_noItems,
 386                  wxT("invalid index in wxListBox::SetClientData") );
 387
 388 #if wxUSE_OWNER_DRAWN
 389     if ( m_windowStyle & wxLB_OWNERDRAW )
 390     {
 391         // client data must be pointer to wxOwnerDrawn, otherwise we would crash
 392         // in OnMeasure/OnDraw.
 393         wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
 394     }
 395 #endif // wxUSE_OWNER_DRAWN
 396
 397     if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
 398         wxLogDebug(wxT("LB_SETITEMDATA failed"));
 399 }
 400
 401 // Return number of selections and an array of selected integers
 402 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 403 {
 404     aSelections.Empty();
 405
 406     if ( HasMultipleSelection() )
 407     {
 408         int countSel = ListBox_GetSelCount(GetHwnd());
 409         if ( countSel == LB_ERR )
 410         {
 411             wxLogDebug(_T("ListBox_GetSelCount failed"));
 412         }
 413         else if ( countSel != 0 )
 414         {
 415             int *selections = new int[countSel];
 416
 417             if ( ListBox_GetSelItems(GetHwnd(),
 418                                      countSel, selections) == LB_ERR )
 419             {
 420                 wxLogDebug(wxT("ListBox_GetSelItems failed"));
 421                 countSel = -1;
 422             }
 423             else
 424             {
 425                 aSelections.Alloc(countSel);
 426                 for ( int n = 0; n < countSel; n++ )
 427                     aSelections.Add(selections[n]);
 428             }
 429
 430             delete [] selections;
 431         }
 432
 433         return countSel;
 434     }
 435     else  // single-selection listbox
 436     {
 437         if (ListBox_GetCurSel(GetHwnd()) > -1)
 438             aSelections.Add(ListBox_GetCurSel(GetHwnd()));
 439
 440         return aSelections.Count();
 441     }
 442 }
 443
 444 // Get single selection, for single choice list items
 445 int wxListBox::GetSelection() const
 446 {
 447     wxCHECK_MSG( !HasMultipleSelection(),
 448                  -1,
 449                  wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
 450
 451     return ListBox_GetCurSel(GetHwnd());
 452 }
 453
 454 // Find string for position
 455 wxString wxListBox::GetString(int N) const
 456 {
 457     wxCHECK_MSG( N >= 0 && N < m_noItems, wxEmptyString,
 458                  wxT("invalid index in wxListBox::GetClientData") );
 459
 460     int len = ListBox_GetTextLen(GetHwnd(), N);
 461
 462     // +1 for terminating NUL
 463     wxString result;
 464     ListBox_GetText(GetHwnd(), N, wxStringBuffer(result, len + 1));
 465
 466     return result;
 467 }
 468
 469 void
 470 wxListBox::DoInsertItems(const wxArrayString& items, int pos)
 471 {
 472     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 473                  wxT("invalid index in wxListBox::InsertItems") );
 474
 475     int nItems = items.GetCount();
 476     for ( int i = 0; i < nItems; i++ )
 477     {
 478         int idx = ListBox_InsertString(GetHwnd(), i + pos, items[i]);
 479
 480 #if wxUSE_OWNER_DRAWN
 481         if ( m_windowStyle & wxLB_OWNERDRAW )
 482         {
 483             wxOwnerDrawn *pNewItem = CreateLboxItem(idx);
 484             pNewItem->SetName(items[i]);
 485             pNewItem->SetFont(GetFont());
 486             m_aItems.Insert(pNewItem, idx);
 487
 488             ListBox_SetItemData(GetHwnd(), idx, pNewItem);
 489         }
 490 #endif // wxUSE_OWNER_DRAWN
 491     }
 492
 493     m_noItems += nItems;
 494
 495     SetHorizontalExtent();
 496 }
 497
 498 void wxListBox::SetString(int N, const wxString& s)
 499 {
 500     wxCHECK_RET( N >= 0 && N < m_noItems,
 501                  wxT("invalid index in wxListBox::SetString") );
 502
 503     // remember the state of the item
 504     bool wasSelected = IsSelected(N);
 505
 506     void *oldData = NULL;
 507     wxClientData *oldObjData = NULL;
 508     if ( m_clientDataItemsType == wxClientData_Void )
 509         oldData = GetClientData(N);
 510     else if ( m_clientDataItemsType == wxClientData_Object )
 511         oldObjData = GetClientObject(N);
 512
 513     // delete and recreate it
 514     SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
 515
 516     int newN = N;
 517     if ( N == m_noItems - 1 )
 518         newN = -1;
 519
 520     ListBox_InsertString(GetHwnd(), newN, s);
 521
 522     // restore the client data
 523     if ( oldData )
 524         SetClientData(N, oldData);
 525     else if ( oldObjData )
 526         SetClientObject(N, oldObjData);
 527
 528     // we may have lost the selection
 529     if ( wasSelected )
 530         Select(N);
 531
 532 #if wxUSE_OWNER_DRAWN
 533     if ( m_windowStyle & wxLB_OWNERDRAW )
 534     {
 535         // update item's text
 536         m_aItems[N]->SetName(s);
 537
 538         // reassign the item's data
 539         ListBox_SetItemData(GetHwnd(), N, m_aItems[N]);
 540     }
 541 #endif  //USE_OWNER_DRAWN
 542 }
 543
 544 int wxListBox::GetCount() const
 545 {
 546     return m_noItems;
 547 }
 548
 549 // ----------------------------------------------------------------------------
 550 // helpers
 551 // ----------------------------------------------------------------------------
 552
 553 // Windows-specific code to set the horizontal extent of the listbox, if
 554 // necessary. If s is non-NULL, it's used to calculate the horizontal extent.
 555 // Otherwise, all strings are used.
 556 void wxListBox::SetHorizontalExtent(const wxString& s)
 557 {
 558     // Only necessary if we want a horizontal scrollbar
 559     if (!(m_windowStyle & wxHSCROLL))
 560         return;
 561     TEXTMETRIC lpTextMetric;
 562
 563     if ( !s.IsEmpty() )
 564     {
 565         int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
 566         HDC dc = GetWindowDC(GetHwnd());
 567         HFONT oldFont = 0;
 568         if (GetFont().Ok() && GetFont().GetResourceHandle())
 569             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 570
 571         GetTextMetrics(dc, &lpTextMetric);
 572         SIZE extentXY;
 573         ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
 574         int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 575
 576         if (oldFont)
 577             ::SelectObject(dc, oldFont);
 578
 579         ReleaseDC(GetHwnd(), dc);
 580         if (extentX > existingExtent)
 581             SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
 582     }
 583     else
 584     {
 585         int largestExtent = 0;
 586         HDC dc = GetWindowDC(GetHwnd());
 587         HFONT oldFont = 0;
 588         if (GetFont().Ok() && GetFont().GetResourceHandle())
 589             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 590
 591         GetTextMetrics(dc, &lpTextMetric);
 592
 593         // FIXME: buffer overflow!!
 594         wxChar buf[1024];
 595         for (int i = 0; i < m_noItems; i++)
 596         {
 597             int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LPARAM)buf);
 598             buf[len] = 0;
 599             SIZE extentXY;
 600             ::GetTextExtentPoint(dc, buf, len, &extentXY);
 601             int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 602             if (extentX > largestExtent)
 603                 largestExtent = extentX;
 604         }
 605         if (oldFont)
 606             ::SelectObject(dc, oldFont);
 607
 608         ReleaseDC(GetHwnd(), dc);
 609         SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
 610     }
 611 }
 612
 613 wxSize wxListBox::DoGetBestSize() const
 614 {
 615     // find the widest string
 616     int wLine;
 617     int wListbox = 0;
 618     for ( int i = 0; i < m_noItems; i++ )
 619     {
 620         wxString str(GetString(i));
 621         GetTextExtent(str, &wLine, NULL);
 622         if ( wLine > wListbox )
 623             wListbox = wLine;
 624     }
 625
 626     // give it some reasonable default value if there are no strings in the
 627     // list
 628     if ( wListbox == 0 )
 629         wListbox = 100;
 630
 631     // the listbox should be slightly larger than the widest string
 632     int cx, cy;
 633     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 634
 635     wListbox += 3*cx;
 636
 637     // don't make the listbox too tall (limit height to 10 items) but don't
 638     // make it too small neither
 639     int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*
 640                     wxMin(wxMax(m_noItems, 3), 10);
 641
 642     return wxSize(wListbox, hListbox);
 643 }
 644
 645 // ----------------------------------------------------------------------------
 646 // callbacks
 647 // ----------------------------------------------------------------------------
 648
 649 bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 650 {
 651     wxEventType evtType;
 652     if ( param == LBN_SELCHANGE )
 653     {
 654         evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
 655     }
 656     else if ( param == LBN_DBLCLK )
 657     {
 658         evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
 659     }
 660     else
 661     {
 662         // some event we're not interested in
 663         return FALSE;
 664     }
 665
 666     wxCommandEvent event(evtType, m_windowId);
 667     event.SetEventObject( this );
 668
 669     // retrieve the affected item
 670     int n = SendMessage(GetHwnd(), LB_GETCARETINDEX, 0, 0);
 671     if ( n != LB_ERR )
 672     {
 673         if ( HasClientObjectData() )
 674             event.SetClientObject( GetClientObject(n) );
 675         else if ( HasClientUntypedData() )
 676             event.SetClientData( GetClientData(n) );
 677
 678         event.SetString( GetString(n) );
 679         event.SetExtraLong( HasMultipleSelection() ? IsSelected(n) : TRUE );
 680     }
 681
 682     event.m_commandInt = n;
 683
 684     return GetEventHandler()->ProcessEvent(event);
 685 }
 686
 687 // ----------------------------------------------------------------------------
 688 // wxCheckListBox support
 689 // ----------------------------------------------------------------------------
 690
 691 #if wxUSE_OWNER_DRAWN
 692
 693 // drawing
 694 // -------
 695
 696 // space beneath/above each row in pixels
 697 // "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
 698 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
 699
 700 // the height is the same for all items
 701 // TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
 702
 703 // NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
 704 //     message is not yet sent when we get here!
 705 bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 706 {
 707     // only owner-drawn control should receive this message
 708     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 709
 710     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 711
 712 #ifdef __WXWINCE__
 713     HDC hdc = GetDC(NULL);
 714 #else
 715     HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
 716 #endif
 717
 718     wxDC dc;
 719     dc.SetHDC((WXHDC)hdc);
 720     dc.SetFont(wxSystemSettings::GetFont(wxSYS_ANSI_VAR_FONT));
 721
 722     pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
 723     pStruct->itemWidth  = dc.GetCharWidth();
 724
 725     dc.SetHDC(0);
 726
 727     DeleteDC(hdc);
 728
 729     return TRUE;
 730 }
 731
 732 // forward the message to the appropriate item
 733 bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 734 {
 735     // only owner-drawn control should receive this message
 736     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 737
 738     DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
 739     UINT itemID = pStruct->itemID;
 740
 741     // the item may be -1 for an empty listbox
 742     if ( itemID == (UINT)-1 )
 743         return FALSE;
 744
 745     long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
 746
 747     wxCHECK( data && (data != LB_ERR), FALSE );
 748
 749     wxListBoxItem *pItem = (wxListBoxItem *)data;
 750
 751     wxDCTemp dc((WXHDC)pStruct->hDC);
 752     wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
 753                 wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
 754
 755     return pItem->OnDrawItem(dc, rect,
 756                              (wxOwnerDrawn::wxODAction)pStruct->itemAction,
 757                              (wxOwnerDrawn::wxODStatus)pStruct->itemState);
 758 }
 759
 760 #endif // wxUSE_OWNER_DRAWN
 761
 762 #endif // wxUSE_LISTBOX