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 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_LISTBOX
  20
  21 #include "wx/listbox.h"
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/dynarray.h"
  25     #include "wx/settings.h"
  26     #include "wx/brush.h"
  27     #include "wx/font.h"
  28     #include "wx/dc.h"
  29     #include "wx/utils.h"
  30     #include "wx/log.h"
  31     #include "wx/window.h"
  32 #endif
  33
  34 #include "wx/msw/private.h"
  35 #include "wx/msw/dc.h"
  36
  37 #include <windowsx.h>
  38
  39 #if wxUSE_OWNER_DRAWN
  40     #include  "wx/ownerdrw.h"
  41 #endif
  42
  43 #if wxUSE_EXTENDED_RTTI
  44 WX_DEFINE_FLAGS( wxListBoxStyle )
  45
  46 wxBEGIN_FLAGS( wxListBoxStyle )
  47     // new style border flags, we put them first to
  48     // use them for streaming out
  49     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  50     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  51     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  52     wxFLAGS_MEMBER(wxBORDER_RAISED)
  53     wxFLAGS_MEMBER(wxBORDER_STATIC)
  54     wxFLAGS_MEMBER(wxBORDER_NONE)
  55
  56     // old style border flags
  57     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  58     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  59     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  60     wxFLAGS_MEMBER(wxRAISED_BORDER)
  61     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  62     wxFLAGS_MEMBER(wxBORDER)
  63
  64     // standard window styles
  65     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  66     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  67     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  68     wxFLAGS_MEMBER(wxWANTS_CHARS)
  69     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  70     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  71     wxFLAGS_MEMBER(wxVSCROLL)
  72     wxFLAGS_MEMBER(wxHSCROLL)
  73
  74     wxFLAGS_MEMBER(wxLB_SINGLE)
  75     wxFLAGS_MEMBER(wxLB_MULTIPLE)
  76     wxFLAGS_MEMBER(wxLB_EXTENDED)
  77     wxFLAGS_MEMBER(wxLB_HSCROLL)
  78     wxFLAGS_MEMBER(wxLB_ALWAYS_SB)
  79     wxFLAGS_MEMBER(wxLB_NEEDED_SB)
  80     wxFLAGS_MEMBER(wxLB_NO_SB)
  81     wxFLAGS_MEMBER(wxLB_SORT)
  82
  83 wxEND_FLAGS( wxListBoxStyle )
  84
  85 IMPLEMENT_DYNAMIC_CLASS_XTI(wxListBox, wxControlWithItems,"wx/listbox.h")
  86
  87 wxBEGIN_PROPERTIES_TABLE(wxListBox)
  88     wxEVENT_PROPERTY( Select , wxEVT_COMMAND_LISTBOX_SELECTED , wxCommandEvent )
  89     wxEVENT_PROPERTY( DoubleClick , wxEVT_COMMAND_LISTBOX_DOUBLECLICKED , wxCommandEvent )
  90
  91     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
  92     wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings, 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  93     wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") )
  94     wxPROPERTY_FLAGS( WindowStyle , wxListBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
  95 wxEND_PROPERTIES_TABLE()
  96
  97 wxBEGIN_HANDLERS_TABLE(wxListBox)
  98 wxEND_HANDLERS_TABLE()
  99
 100 wxCONSTRUCTOR_4( wxListBox , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
 101 #else
 102 IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControlWithItems)
 103 #endif
 104
 105 /*
 106 TODO PROPERTIES
 107     selection
 108     content
 109         item
 110 */
 111
 112 // ============================================================================
 113 // list box item declaration and implementation
 114 // ============================================================================
 115
 116 #if wxUSE_OWNER_DRAWN
 117
 118 class wxListBoxItem : public wxOwnerDrawn
 119 {
 120 public:
 121     wxListBoxItem(wxListBox *parent)
 122         { m_parent = parent; }
 123
 124     wxListBox *GetParent() const
 125         { return m_parent; }
 126
 127     int GetIndex() const
 128         { return m_parent->GetItemIndex(const_cast<wxListBoxItem*>(this)); }
 129
 130     wxString GetName() const
 131         { return m_parent->GetString(GetIndex()); }
 132
 133 private:
 134     wxListBox *m_parent;
 135 };
 136
 137 wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n))
 138 {
 139     return new wxListBoxItem(this);
 140 }
 141
 142 #endif  //USE_OWNER_DRAWN
 143
 144 // ============================================================================
 145 // list box control implementation
 146 // ============================================================================
 147
 148 // ----------------------------------------------------------------------------
 149 // creation
 150 // ----------------------------------------------------------------------------
 151
 152 // Listbox item
 153 wxListBox::wxListBox()
 154 {
 155     m_noItems = 0;
 156     m_updateHorizontalExtent = false;
 157 }
 158
 159 bool wxListBox::Create(wxWindow *parent,
 160                        wxWindowID id,
 161                        const wxPoint& pos,
 162                        const wxSize& size,
 163                        int n, const wxString choices[],
 164                        long style,
 165                        const wxValidator& validator,
 166                        const wxString& name)
 167 {
 168     m_noItems = 0;
 169     m_updateHorizontalExtent = false;
 170
 171     // initialize base class fields
 172     if ( !CreateControl(parent, id, pos, size, style, validator, name) )
 173         return false;
 174
 175     // create the native control
 176     if ( !MSWCreateControl(wxT("LISTBOX"), wxEmptyString, pos, size) )
 177     {
 178         // control creation failed
 179         return false;
 180     }
 181
 182     // initialize the contents
 183     for ( int i = 0; i < n; i++ )
 184     {
 185         Append(choices[i]);
 186     }
 187
 188     // now we can compute our best size correctly, so do it again
 189     InvalidateBestSize();
 190     SetInitialSize(size);
 191
 192     return true;
 193 }
 194
 195 bool wxListBox::Create(wxWindow *parent,
 196                        wxWindowID id,
 197                        const wxPoint& pos,
 198                        const wxSize& size,
 199                        const wxArrayString& choices,
 200                        long style,
 201                        const wxValidator& validator,
 202                        const wxString& name)
 203 {
 204     wxCArrayString chs(choices);
 205     return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
 206                   style, validator, name);
 207 }
 208
 209 wxListBox::~wxListBox()
 210 {
 211     Clear();
 212 }
 213
 214 WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 215 {
 216     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 217
 218     // we always want to get the notifications
 219     msStyle |= LBS_NOTIFY;
 220
 221     // without this style, you get unexpected heights, so e.g. constraint
 222     // layout doesn't work properly
 223     msStyle |= LBS_NOINTEGRALHEIGHT;
 224
 225     wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED),
 226                   wxT("only one of listbox selection modes can be specified") );
 227
 228     if ( style & wxLB_MULTIPLE )
 229         msStyle |= LBS_MULTIPLESEL;
 230     else if ( style & wxLB_EXTENDED )
 231         msStyle |= LBS_EXTENDEDSEL;
 232
 233     wxASSERT_MSG( !(style & wxLB_ALWAYS_SB) || !(style & wxLB_NO_SB),
 234                   wxT( "Conflicting styles wxLB_ALWAYS_SB and wxLB_NO_SB." ) );
 235
 236     if ( !(style & wxLB_NO_SB) )
 237     {
 238         msStyle |= WS_VSCROLL;
 239         if ( style & wxLB_ALWAYS_SB )
 240             msStyle |= LBS_DISABLENOSCROLL;
 241     }
 242
 243     if ( m_windowStyle & wxLB_HSCROLL )
 244         msStyle |= WS_HSCROLL;
 245     if ( m_windowStyle & wxLB_SORT )
 246         msStyle |= LBS_SORT;
 247
 248 #if wxUSE_OWNER_DRAWN && !defined(__WXWINCE__)
 249     if ( m_windowStyle & wxLB_OWNERDRAW )
 250     {
 251         // we don't support LBS_OWNERDRAWVARIABLE yet and we also always put
 252         // the strings in the listbox for simplicity even though we could have
 253         // avoided it in this case
 254         msStyle |= LBS_OWNERDRAWFIXED | LBS_HASSTRINGS;
 255     }
 256 #endif // wxUSE_OWNER_DRAWN
 257
 258     return msStyle;
 259 }
 260
 261 void wxListBox::OnInternalIdle()
 262 {
 263     wxWindow::OnInternalIdle();
 264
 265     if (m_updateHorizontalExtent)
 266     {
 267         SetHorizontalExtent(wxEmptyString);
 268         m_updateHorizontalExtent = false;
 269     }
 270 }
 271
 272 // ----------------------------------------------------------------------------
 273 // implementation of wxListBoxBase methods
 274 // ----------------------------------------------------------------------------
 275
 276 void wxListBox::DoSetFirstItem(int N)
 277 {
 278     wxCHECK_RET( IsValid(N),
 279                  wxT("invalid index in wxListBox::SetFirstItem") );
 280
 281     SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
 282 }
 283
 284 void wxListBox::DoDeleteOneItem(unsigned int n)
 285 {
 286     wxCHECK_RET( IsValid(n),
 287                  wxT("invalid index in wxListBox::Delete") );
 288
 289 #if wxUSE_OWNER_DRAWN
 290     if ( HasFlag(wxLB_OWNERDRAW) )
 291     {
 292         delete m_aItems[n];
 293         m_aItems.RemoveAt(n);
 294     }
 295 #endif // wxUSE_OWNER_DRAWN
 296
 297     SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
 298     m_noItems--;
 299
 300     // SetHorizontalExtent(wxEmptyString); can be slow
 301     m_updateHorizontalExtent = true;
 302
 303     UpdateOldSelections();
 304 }
 305
 306 int wxListBox::FindString(const wxString& s, bool bCase) const
 307 {
 308     // back to base class search for not native search type
 309     if (bCase)
 310        return wxItemContainerImmutable::FindString( s, bCase );
 311
 312     int pos = ListBox_FindStringExact(GetHwnd(), -1, s.wx_str());
 313     if (pos == LB_ERR)
 314         return wxNOT_FOUND;
 315     else
 316         return pos;
 317 }
 318
 319 void wxListBox::DoClear()
 320 {
 321 #if wxUSE_OWNER_DRAWN
 322     if ( HasFlag(wxLB_OWNERDRAW) )
 323     {
 324         WX_CLEAR_ARRAY(m_aItems);
 325     }
 326 #endif // wxUSE_OWNER_DRAWN
 327
 328     ListBox_ResetContent(GetHwnd());
 329
 330     m_noItems = 0;
 331     m_updateHorizontalExtent = true;
 332
 333     UpdateOldSelections();
 334 }
 335
 336 void wxListBox::DoSetSelection(int N, bool select)
 337 {
 338     wxCHECK_RET( N == wxNOT_FOUND || IsValid(N),
 339                  wxT("invalid index in wxListBox::SetSelection") );
 340
 341     if ( HasMultipleSelection() )
 342     {
 343         SendMessage(GetHwnd(), LB_SETSEL, select, N);
 344     }
 345     else
 346     {
 347         SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
 348     }
 349
 350     UpdateOldSelections();
 351 }
 352
 353 bool wxListBox::IsSelected(int N) const
 354 {
 355     wxCHECK_MSG( IsValid(N), false,
 356                  wxT("invalid index in wxListBox::Selected") );
 357
 358     return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? false : true;
 359 }
 360
 361 void *wxListBox::DoGetItemClientData(unsigned int n) const
 362 {
 363     wxCHECK_MSG( IsValid(n), NULL,
 364                  wxT("invalid index in wxListBox::GetClientData") );
 365
 366     return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
 367 }
 368
 369 void wxListBox::DoSetItemClientData(unsigned int n, void *clientData)
 370 {
 371     wxCHECK_RET( IsValid(n),
 372                  wxT("invalid index in wxListBox::SetClientData") );
 373
 374     if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
 375     {
 376         wxLogDebug(wxT("LB_SETITEMDATA failed"));
 377     }
 378 }
 379
 380 // Return number of selections and an array of selected integers
 381 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 382 {
 383     aSelections.Empty();
 384
 385     if ( HasMultipleSelection() )
 386     {
 387         int countSel = ListBox_GetSelCount(GetHwnd());
 388         if ( countSel == LB_ERR )
 389         {
 390             wxLogDebug(wxT("ListBox_GetSelCount failed"));
 391         }
 392         else if ( countSel != 0 )
 393         {
 394             int *selections = new int[countSel];
 395
 396             if ( ListBox_GetSelItems(GetHwnd(),
 397                                      countSel, selections) == LB_ERR )
 398             {
 399                 wxLogDebug(wxT("ListBox_GetSelItems failed"));
 400                 countSel = -1;
 401             }
 402             else
 403             {
 404                 aSelections.Alloc(countSel);
 405                 for ( int n = 0; n < countSel; n++ )
 406                     aSelections.Add(selections[n]);
 407             }
 408
 409             delete [] selections;
 410         }
 411
 412         return countSel;
 413     }
 414     else  // single-selection listbox
 415     {
 416         if (ListBox_GetCurSel(GetHwnd()) > -1)
 417             aSelections.Add(ListBox_GetCurSel(GetHwnd()));
 418
 419         return aSelections.Count();
 420     }
 421 }
 422
 423 // Get single selection, for single choice list items
 424 int wxListBox::GetSelection() const
 425 {
 426     wxCHECK_MSG( !HasMultipleSelection(),
 427                  -1,
 428                  wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
 429
 430     return ListBox_GetCurSel(GetHwnd());
 431 }
 432
 433 // Find string for position
 434 wxString wxListBox::GetString(unsigned int n) const
 435 {
 436     wxCHECK_MSG( IsValid(n), wxEmptyString,
 437                  wxT("invalid index in wxListBox::GetString") );
 438
 439     int len = ListBox_GetTextLen(GetHwnd(), n);
 440
 441     // +1 for terminating NUL
 442     wxString result;
 443     ListBox_GetText(GetHwnd(), n, (wxChar*)wxStringBuffer(result, len + 1));
 444
 445     return result;
 446 }
 447
 448 int wxListBox::DoInsertItems(const wxArrayStringsAdapter & items,
 449                              unsigned int pos,
 450                              void **clientData,
 451                              wxClientDataType type)
 452 {
 453     MSWAllocStorage(items, LB_INITSTORAGE);
 454
 455     const bool append = pos == GetCount();
 456
 457     // we must use CB_ADDSTRING when appending as only it works correctly for
 458     // the sorted controls
 459     const unsigned msg = append ? LB_ADDSTRING : LB_INSERTSTRING;
 460
 461     if ( append )
 462         pos = 0;
 463
 464     int n = wxNOT_FOUND;
 465
 466     const unsigned int numItems = items.GetCount();
 467     for ( unsigned int i = 0; i < numItems; i++ )
 468     {
 469         n = MSWInsertOrAppendItem(pos, items[i], msg);
 470         if ( n == wxNOT_FOUND )
 471             return n;
 472
 473         if ( !append )
 474             pos++;
 475
 476         ++m_noItems;
 477
 478 #if wxUSE_OWNER_DRAWN
 479         if ( HasFlag(wxLB_OWNERDRAW) )
 480         {
 481             wxOwnerDrawn *pNewItem = CreateLboxItem(n);
 482             pNewItem->SetFont(GetFont());
 483             m_aItems.Insert(pNewItem, n);
 484         }
 485 #endif // wxUSE_OWNER_DRAWN
 486         AssignNewItemClientData(n, clientData, i, type);
 487     }
 488
 489     m_updateHorizontalExtent = true;
 490
 491     UpdateOldSelections();
 492
 493     return n;
 494 }
 495
 496 int wxListBox::DoHitTestList(const wxPoint& point) const
 497 {
 498     LRESULT lRes = ::SendMessage(GetHwnd(), LB_ITEMFROMPOINT,
 499                                  0, MAKELPARAM(point.x, point.y));
 500
 501     // non zero high-order word means that this item is outside of the client
 502     // area, IOW the point is outside of the listbox
 503     return HIWORD(lRes) ? wxNOT_FOUND : LOWORD(lRes);
 504 }
 505
 506 void wxListBox::SetString(unsigned int n, const wxString& s)
 507 {
 508     wxCHECK_RET( IsValid(n),
 509                  wxT("invalid index in wxListBox::SetString") );
 510
 511     // remember the state of the item
 512     bool wasSelected = IsSelected(n);
 513
 514     void *oldData = NULL;
 515     wxClientData *oldObjData = NULL;
 516     if ( HasClientUntypedData() )
 517         oldData = GetClientData(n);
 518     else if ( HasClientObjectData() )
 519         oldObjData = GetClientObject(n);
 520
 521     // delete and recreate it
 522     SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
 523
 524     int newN = n;
 525     if ( n == (m_noItems - 1) )
 526         newN = -1;
 527
 528     ListBox_InsertString(GetHwnd(), newN, s.wx_str());
 529
 530     // restore the client data
 531     if ( oldData )
 532         SetClientData(n, oldData);
 533     else if ( oldObjData )
 534         SetClientObject(n, oldObjData);
 535
 536     // we may have lost the selection
 537     if ( wasSelected )
 538         Select(n);
 539
 540     m_updateHorizontalExtent = true;
 541 }
 542
 543 unsigned int wxListBox::GetCount() const
 544 {
 545     return m_noItems;
 546 }
 547
 548 // ----------------------------------------------------------------------------
 549 // size-related stuff
 550 // ----------------------------------------------------------------------------
 551
 552 void wxListBox::SetHorizontalExtent(const wxString& s)
 553 {
 554     // in any case, our best size could have changed
 555     InvalidateBestSize();
 556
 557     // the rest is only necessary if we want a horizontal scrollbar
 558     if ( !HasFlag(wxHSCROLL) )
 559         return;
 560
 561
 562     WindowHDC dc(GetHwnd());
 563     SelectInHDC selFont(dc, GetHfontOf(GetFont()));
 564
 565     TEXTMETRIC lpTextMetric;
 566     ::GetTextMetrics(dc, &lpTextMetric);
 567
 568     int largestExtent = 0;
 569     SIZE extentXY;
 570
 571     if ( s.empty() )
 572     {
 573         // set extent to the max length of all strings
 574         for ( unsigned int i = 0; i < m_noItems; i++ )
 575         {
 576             const wxString str = GetString(i);
 577             ::GetTextExtentPoint32(dc, str.c_str(), str.length(), &extentXY);
 578
 579             int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 580             if ( extentX > largestExtent )
 581                 largestExtent = extentX;
 582         }
 583     }
 584     else // just increase the extent to the length of this string
 585     {
 586         int existingExtent = (int)SendMessage(GetHwnd(),
 587                                               LB_GETHORIZONTALEXTENT, 0, 0L);
 588
 589         ::GetTextExtentPoint32(dc, s.c_str(), s.length(), &extentXY);
 590
 591         int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 592         if ( extentX > existingExtent )
 593             largestExtent = extentX;
 594     }
 595
 596     if ( largestExtent )
 597         SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
 598     //else: it shouldn't change
 599 }
 600
 601 wxSize wxListBox::DoGetBestClientSize() const
 602 {
 603     // find the widest string
 604     int wLine;
 605     int wListbox = 0;
 606     for (unsigned int i = 0; i < m_noItems; i++)
 607     {
 608         wxString str(GetString(i));
 609         GetTextExtent(str, &wLine, NULL);
 610         if ( wLine > wListbox )
 611             wListbox = wLine;
 612     }
 613
 614     // give it some reasonable default value if there are no strings in the
 615     // list
 616     if ( wListbox == 0 )
 617         wListbox = 100;
 618
 619     // the listbox should be slightly larger than the widest string
 620     wListbox += 3*GetCharWidth();
 621
 622     // add room for the scrollbar
 623     wListbox += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
 624
 625     // don't make the listbox too tall (limit height to 10 items) but don't
 626     // make it too small neither
 627     int hListbox = SendMessage(GetHwnd(), LB_GETITEMHEIGHT, 0, 0)*
 628                     wxMin(wxMax(m_noItems, 3), 10);
 629
 630     return wxSize(wListbox, hListbox);
 631 }
 632
 633 // ----------------------------------------------------------------------------
 634 // callbacks
 635 // ----------------------------------------------------------------------------
 636
 637 bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 638 {
 639     if ((param == LBN_SELCHANGE) && HasMultipleSelection())
 640     {
 641         CalcAndSendEvent();
 642         return true;
 643     }
 644
 645     wxEventType evtType;
 646     int n;
 647     if ( param == LBN_SELCHANGE )
 648     {
 649         evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
 650         n = SendMessage(GetHwnd(), LB_GETCARETINDEX, 0, 0);
 651
 652         // NB: conveniently enough, LB_ERR is the same as wxNOT_FOUND
 653     }
 654     else if ( param == LBN_DBLCLK )
 655     {
 656         evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
 657         n = HitTest(ScreenToClient(wxGetMousePosition()));
 658     }
 659     else
 660     {
 661         // some event we're not interested in
 662         return false;
 663     }
 664
 665     // retrieve the affected item
 666     if ( n == wxNOT_FOUND )
 667         return false;
 668
 669     wxCommandEvent event(evtType, m_windowId);
 670     event.SetEventObject(this);
 671
 672     if ( HasClientObjectData() )
 673         event.SetClientObject( GetClientObject(n) );
 674     else if ( HasClientUntypedData() )
 675         event.SetClientData( GetClientData(n) );
 676
 677     event.SetString(GetString(n));
 678     event.SetInt(n);
 679
 680     return HandleWindowEvent(event);
 681 }
 682
 683 // ----------------------------------------------------------------------------
 684 // owner-drawn list boxes support
 685 // ----------------------------------------------------------------------------
 686
 687 #if wxUSE_OWNER_DRAWN
 688
 689 // misc overloaded methods
 690 // -----------------------
 691
 692 bool wxListBox::SetFont(const wxFont &font)
 693 {
 694     if ( HasFlag(wxLB_OWNERDRAW) )
 695     {
 696         const unsigned count = m_aItems.GetCount();
 697         for ( unsigned i = 0; i < count; i++ )
 698             m_aItems[i]->SetFont(font);
 699     }
 700
 701     wxListBoxBase::SetFont(font);
 702
 703     return true;
 704 }
 705
 706 bool wxListBox::GetItemRect(size_t n, wxRect& rect) const
 707 {
 708     wxCHECK_MSG( IsValid(n), false,
 709                  wxT("invalid index in wxListBox::GetItemRect") );
 710
 711     RECT rc;
 712
 713     if ( ListBox_GetItemRect(GetHwnd(), n, &rc) != LB_ERR )
 714     {
 715         rect = wxRectFromRECT(rc);
 716         return true;
 717     }
 718     else
 719     {
 720         // couldn't retrieve rect: for example, item isn't visible
 721         return false;
 722     }
 723 }
 724
 725 bool wxListBox::RefreshItem(size_t n)
 726 {
 727     wxRect rect;
 728     if ( !GetItemRect(n, rect) )
 729         return false;
 730
 731     RECT rc;
 732     wxCopyRectToRECT(rect, rc);
 733
 734     return ::InvalidateRect((HWND)GetHWND(), &rc, FALSE) == TRUE;
 735 }
 736
 737
 738 // drawing
 739 // -------
 740
 741 namespace
 742 {
 743     // space beneath/above each row in pixels
 744     static const int LISTBOX_EXTRA_SPACE = 1;
 745
 746 } // anonymous namespace
 747
 748 // the height is the same for all items
 749 // TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
 750
 751 // NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
 752 //     message is not yet sent when we get here!
 753 bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 754 {
 755     // only owner-drawn control should receive this message
 756     wxCHECK( HasFlag(wxLB_OWNERDRAW), false );
 757
 758     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 759
 760 #ifdef __WXWINCE__
 761     HDC hdc = GetDC(NULL);
 762 #else
 763     HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
 764 #endif
 765
 766     {
 767         wxDCTemp dc((WXHDC)hdc);
 768         dc.SetFont(GetFont());
 769
 770         pStruct->itemHeight = dc.GetCharHeight() + 2 * LISTBOX_EXTRA_SPACE;
 771         pStruct->itemWidth  = dc.GetCharWidth();
 772     }
 773
 774 #ifdef __WXWINCE__
 775     ReleaseDC(NULL, hdc);
 776 #else
 777     DeleteDC(hdc);
 778 #endif
 779
 780     return true;
 781 }
 782
 783 // forward the message to the appropriate item
 784 bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 785 {
 786     // only owner-drawn control should receive this message
 787     wxCHECK( HasFlag(wxLB_OWNERDRAW), false );
 788
 789     DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
 790
 791     // the item may be -1 for an empty listbox
 792     if ( pStruct->itemID == (UINT)-1 )
 793         return false;
 794
 795     wxListBoxItem *pItem = (wxListBoxItem *)m_aItems[pStruct->itemID];
 796
 797     wxDCTemp dc((WXHDC)pStruct->hDC);
 798
 799     return pItem->OnDrawItem(dc, wxRectFromRECT(pStruct->rcItem),
 800                              (wxOwnerDrawn::wxODAction)pStruct->itemAction,
 801                              (wxOwnerDrawn::wxODStatus)(pStruct->itemState | wxOwnerDrawn::wxODHidePrefix));
 802 }
 803
 804 #endif // wxUSE_OWNER_DRAWN
 805
 806 #endif // wxUSE_LISTBOX