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     SetInitialSize(size);
 190
 191     return true;
 192 }
 193
 194 bool wxListBox::Create(wxWindow *parent,
 195                        wxWindowID id,
 196                        const wxPoint& pos,
 197                        const wxSize& size,
 198                        const wxArrayString& choices,
 199                        long style,
 200                        const wxValidator& validator,
 201                        const wxString& name)
 202 {
 203     wxCArrayString chs(choices);
 204     return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
 205                   style, validator, name);
 206 }
 207
 208 wxListBox::~wxListBox()
 209 {
 210     Clear();
 211 }
 212
 213 WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 214 {
 215     WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle);
 216
 217     // we always want to get the notifications
 218     msStyle |= LBS_NOTIFY;
 219
 220     // without this style, you get unexpected heights, so e.g. constraint
 221     // layout doesn't work properly
 222     msStyle |= LBS_NOINTEGRALHEIGHT;
 223
 224     wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED),
 225                   wxT("only one of listbox selection modes can be specified") );
 226
 227     if ( style & wxLB_MULTIPLE )
 228         msStyle |= LBS_MULTIPLESEL;
 229     else if ( style & wxLB_EXTENDED )
 230         msStyle |= LBS_EXTENDEDSEL;
 231
 232     wxASSERT_MSG( !(style & wxLB_ALWAYS_SB) || !(style & wxLB_NO_SB),
 233                   wxT( "Conflicting styles wxLB_ALWAYS_SB and wxLB_NO_SB." ) );
 234
 235     if ( !(style & wxLB_NO_SB) )
 236     {
 237         msStyle |= WS_VSCROLL;
 238         if ( style & wxLB_ALWAYS_SB )
 239             msStyle |= LBS_DISABLENOSCROLL;
 240     }
 241
 242     if ( m_windowStyle & wxLB_HSCROLL )
 243         msStyle |= WS_HSCROLL;
 244     if ( m_windowStyle & wxLB_SORT )
 245         msStyle |= LBS_SORT;
 246
 247 #if wxUSE_OWNER_DRAWN && !defined(__WXWINCE__)
 248     if ( m_windowStyle & wxLB_OWNERDRAW )
 249     {
 250         // we don't support LBS_OWNERDRAWVARIABLE yet and we also always put
 251         // the strings in the listbox for simplicity even though we could have
 252         // avoided it in this case
 253         msStyle |= LBS_OWNERDRAWFIXED | LBS_HASSTRINGS;
 254     }
 255 #endif // wxUSE_OWNER_DRAWN
 256
 257     return msStyle;
 258 }
 259
 260 void wxListBox::OnInternalIdle()
 261 {
 262     wxWindow::OnInternalIdle();
 263
 264     if (m_updateHorizontalExtent)
 265     {
 266         SetHorizontalExtent(wxEmptyString);
 267         m_updateHorizontalExtent = false;
 268     }
 269 }
 270
 271 void wxListBox::MSWOnItemsChanged()
 272 {
 273     // we need to do two things when items change: update their max horizontal
 274     // extent so that horizontal scrollbar could be shown or hidden as
 275     // appropriate and also invlaidate the best size
 276     //
 277     // updating the max extent is slow (it's an O(N) operation) and so we defer
 278     // it until the idle time but the best size should be invalidated
 279     // immediately doing it in idle time is too late -- layout using incorrect
 280     // old best size will have been already done by then
 281
 282     m_updateHorizontalExtent = true;
 283
 284     InvalidateBestSize();
 285 }
 286
 287 // ----------------------------------------------------------------------------
 288 // implementation of wxListBoxBase methods
 289 // ----------------------------------------------------------------------------
 290
 291 void wxListBox::DoSetFirstItem(int N)
 292 {
 293     wxCHECK_RET( IsValid(N),
 294                  wxT("invalid index in wxListBox::SetFirstItem") );
 295
 296     SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
 297 }
 298
 299 void wxListBox::DoDeleteOneItem(unsigned int n)
 300 {
 301     wxCHECK_RET( IsValid(n),
 302                  wxT("invalid index in wxListBox::Delete") );
 303
 304 #if wxUSE_OWNER_DRAWN
 305     if ( HasFlag(wxLB_OWNERDRAW) )
 306     {
 307         delete m_aItems[n];
 308         m_aItems.RemoveAt(n);
 309     }
 310 #endif // wxUSE_OWNER_DRAWN
 311
 312     SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
 313     m_noItems--;
 314
 315     MSWOnItemsChanged();
 316
 317     UpdateOldSelections();
 318 }
 319
 320 int wxListBox::FindString(const wxString& s, bool bCase) const
 321 {
 322     // back to base class search for not native search type
 323     if (bCase)
 324        return wxItemContainerImmutable::FindString( s, bCase );
 325
 326     int pos = ListBox_FindStringExact(GetHwnd(), -1, s.wx_str());
 327     if (pos == LB_ERR)
 328         return wxNOT_FOUND;
 329     else
 330         return pos;
 331 }
 332
 333 void wxListBox::DoClear()
 334 {
 335 #if wxUSE_OWNER_DRAWN
 336     if ( HasFlag(wxLB_OWNERDRAW) )
 337     {
 338         WX_CLEAR_ARRAY(m_aItems);
 339     }
 340 #endif // wxUSE_OWNER_DRAWN
 341
 342     ListBox_ResetContent(GetHwnd());
 343
 344     m_noItems = 0;
 345     MSWOnItemsChanged();
 346
 347     UpdateOldSelections();
 348 }
 349
 350 void wxListBox::DoSetSelection(int N, bool select)
 351 {
 352     wxCHECK_RET( N == wxNOT_FOUND || IsValid(N),
 353                  wxT("invalid index in wxListBox::SetSelection") );
 354
 355     if ( HasMultipleSelection() )
 356     {
 357         SendMessage(GetHwnd(), LB_SETSEL, select, N);
 358     }
 359     else
 360     {
 361         SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
 362     }
 363
 364     UpdateOldSelections();
 365 }
 366
 367 bool wxListBox::IsSelected(int N) const
 368 {
 369     wxCHECK_MSG( IsValid(N), false,
 370                  wxT("invalid index in wxListBox::Selected") );
 371
 372     return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? false : true;
 373 }
 374
 375 void *wxListBox::DoGetItemClientData(unsigned int n) const
 376 {
 377     wxCHECK_MSG( IsValid(n), NULL,
 378                  wxT("invalid index in wxListBox::GetClientData") );
 379
 380     return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
 381 }
 382
 383 void wxListBox::DoSetItemClientData(unsigned int n, void *clientData)
 384 {
 385     wxCHECK_RET( IsValid(n),
 386                  wxT("invalid index in wxListBox::SetClientData") );
 387
 388     if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
 389     {
 390         wxLogDebug(wxT("LB_SETITEMDATA failed"));
 391     }
 392 }
 393
 394 // Return number of selections and an array of selected integers
 395 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 396 {
 397     aSelections.Empty();
 398
 399     if ( HasMultipleSelection() )
 400     {
 401         int countSel = ListBox_GetSelCount(GetHwnd());
 402         if ( countSel == LB_ERR )
 403         {
 404             wxLogDebug(wxT("ListBox_GetSelCount failed"));
 405         }
 406         else if ( countSel != 0 )
 407         {
 408             int *selections = new int[countSel];
 409
 410             if ( ListBox_GetSelItems(GetHwnd(),
 411                                      countSel, selections) == LB_ERR )
 412             {
 413                 wxLogDebug(wxT("ListBox_GetSelItems failed"));
 414                 countSel = -1;
 415             }
 416             else
 417             {
 418                 aSelections.Alloc(countSel);
 419                 for ( int n = 0; n < countSel; n++ )
 420                     aSelections.Add(selections[n]);
 421             }
 422
 423             delete [] selections;
 424         }
 425
 426         return countSel;
 427     }
 428     else  // single-selection listbox
 429     {
 430         if (ListBox_GetCurSel(GetHwnd()) > -1)
 431             aSelections.Add(ListBox_GetCurSel(GetHwnd()));
 432
 433         return aSelections.Count();
 434     }
 435 }
 436
 437 // Get single selection, for single choice list items
 438 int wxListBox::GetSelection() const
 439 {
 440     wxCHECK_MSG( !HasMultipleSelection(),
 441                  -1,
 442                  wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") );
 443
 444     return ListBox_GetCurSel(GetHwnd());
 445 }
 446
 447 // Find string for position
 448 wxString wxListBox::GetString(unsigned int n) const
 449 {
 450     wxCHECK_MSG( IsValid(n), wxEmptyString,
 451                  wxT("invalid index in wxListBox::GetString") );
 452
 453     int len = ListBox_GetTextLen(GetHwnd(), n);
 454
 455     // +1 for terminating NUL
 456     wxString result;
 457     ListBox_GetText(GetHwnd(), n, (wxChar*)wxStringBuffer(result, len + 1));
 458
 459     return result;
 460 }
 461
 462 int wxListBox::DoInsertItems(const wxArrayStringsAdapter & items,
 463                              unsigned int pos,
 464                              void **clientData,
 465                              wxClientDataType type)
 466 {
 467     MSWAllocStorage(items, LB_INITSTORAGE);
 468
 469     const bool append = pos == GetCount();
 470
 471     // we must use CB_ADDSTRING when appending as only it works correctly for
 472     // the sorted controls
 473     const unsigned msg = append ? LB_ADDSTRING : LB_INSERTSTRING;
 474
 475     if ( append )
 476         pos = 0;
 477
 478     int n = wxNOT_FOUND;
 479
 480     const unsigned int numItems = items.GetCount();
 481     for ( unsigned int i = 0; i < numItems; i++ )
 482     {
 483         n = MSWInsertOrAppendItem(pos, items[i], msg);
 484         if ( n == wxNOT_FOUND )
 485             return n;
 486
 487         if ( !append )
 488             pos++;
 489
 490         ++m_noItems;
 491
 492 #if wxUSE_OWNER_DRAWN
 493         if ( HasFlag(wxLB_OWNERDRAW) )
 494         {
 495             wxOwnerDrawn *pNewItem = CreateLboxItem(n);
 496             pNewItem->SetFont(GetFont());
 497             m_aItems.Insert(pNewItem, n);
 498         }
 499 #endif // wxUSE_OWNER_DRAWN
 500         AssignNewItemClientData(n, clientData, i, type);
 501     }
 502
 503     MSWOnItemsChanged();
 504
 505     UpdateOldSelections();
 506
 507     return n;
 508 }
 509
 510 int wxListBox::DoHitTestList(const wxPoint& point) const
 511 {
 512     LRESULT lRes = ::SendMessage(GetHwnd(), LB_ITEMFROMPOINT,
 513                                  0, MAKELPARAM(point.x, point.y));
 514
 515     // non zero high-order word means that this item is outside of the client
 516     // area, IOW the point is outside of the listbox
 517     return HIWORD(lRes) ? wxNOT_FOUND : LOWORD(lRes);
 518 }
 519
 520 void wxListBox::SetString(unsigned int n, const wxString& s)
 521 {
 522     wxCHECK_RET( IsValid(n),
 523                  wxT("invalid index in wxListBox::SetString") );
 524
 525     // remember the state of the item
 526     bool wasSelected = IsSelected(n);
 527
 528     void *oldData = NULL;
 529     wxClientData *oldObjData = NULL;
 530     if ( HasClientUntypedData() )
 531         oldData = GetClientData(n);
 532     else if ( HasClientObjectData() )
 533         oldObjData = GetClientObject(n);
 534
 535     // delete and recreate it
 536     SendMessage(GetHwnd(), LB_DELETESTRING, n, 0);
 537
 538     int newN = n;
 539     if ( n == (m_noItems - 1) )
 540         newN = -1;
 541
 542     ListBox_InsertString(GetHwnd(), newN, s.wx_str());
 543
 544     // restore the client data
 545     if ( oldData )
 546         SetClientData(n, oldData);
 547     else if ( oldObjData )
 548         SetClientObject(n, oldObjData);
 549
 550     // we may have lost the selection
 551     if ( wasSelected )
 552         Select(n);
 553
 554     MSWOnItemsChanged();
 555 }
 556
 557 unsigned int wxListBox::GetCount() const
 558 {
 559     return m_noItems;
 560 }
 561
 562 // ----------------------------------------------------------------------------
 563 // size-related stuff
 564 // ----------------------------------------------------------------------------
 565
 566 void wxListBox::SetHorizontalExtent(const wxString& s)
 567 {
 568     // the rest is only necessary if we want a horizontal scrollbar
 569     if ( !HasFlag(wxHSCROLL) )
 570         return;
 571
 572
 573     WindowHDC dc(GetHwnd());
 574     SelectInHDC selFont(dc, GetHfontOf(GetFont()));
 575
 576     TEXTMETRIC lpTextMetric;
 577     ::GetTextMetrics(dc, &lpTextMetric);
 578
 579     int largestExtent = 0;
 580     SIZE extentXY;
 581
 582     if ( s.empty() )
 583     {
 584         // set extent to the max length of all strings
 585         for ( unsigned int i = 0; i < m_noItems; i++ )
 586         {
 587             const wxString str = GetString(i);
 588             ::GetTextExtentPoint32(dc, str.c_str(), str.length(), &extentXY);
 589
 590             int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 591             if ( extentX > largestExtent )
 592                 largestExtent = extentX;
 593         }
 594     }
 595     else // just increase the extent to the length of this string
 596     {
 597         int existingExtent = (int)SendMessage(GetHwnd(),
 598                                               LB_GETHORIZONTALEXTENT, 0, 0L);
 599
 600         ::GetTextExtentPoint32(dc, s.c_str(), s.length(), &extentXY);
 601
 602         int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 603         if ( extentX > existingExtent )
 604             largestExtent = extentX;
 605     }
 606
 607     if ( largestExtent )
 608         SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
 609     //else: it shouldn't change
 610 }
 611
 612 wxSize wxListBox::DoGetBestClientSize() const
 613 {
 614     // find the widest string
 615     int wLine;
 616     int wListbox = 0;
 617     for (unsigned int i = 0; i < m_noItems; i++)
 618     {
 619         wxString str(GetString(i));
 620         GetTextExtent(str, &wLine, NULL);
 621         if ( wLine > wListbox )
 622             wListbox = wLine;
 623     }
 624
 625     // give it some reasonable default value if there are no strings in the
 626     // list
 627     if ( wListbox == 0 )
 628         wListbox = 100;
 629
 630     // the listbox should be slightly larger than the widest string
 631     wListbox += 3*GetCharWidth();
 632
 633     // add room for the scrollbar
 634     wListbox += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
 635
 636     // don't make the listbox too tall (limit height to 10 items) but don't
 637     // make it too small neither
 638     int hListbox = SendMessage(GetHwnd(), LB_GETITEMHEIGHT, 0, 0)*
 639                     wxMin(wxMax(m_noItems, 3), 10);
 640
 641     return wxSize(wListbox, hListbox);
 642 }
 643
 644 // ----------------------------------------------------------------------------
 645 // callbacks
 646 // ----------------------------------------------------------------------------
 647
 648 bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 649 {
 650     wxEventType evtType;
 651     int n;
 652     if ( param == LBN_SELCHANGE )
 653     {
 654         if ( HasMultipleSelection() )
 655             return CalcAndSendEvent();
 656
 657         evtType = wxEVT_COMMAND_LISTBOX_SELECTED;
 658         n = SendMessage(GetHwnd(), LB_GETCARETINDEX, 0, 0);
 659
 660         // NB: conveniently enough, LB_ERR is the same as wxNOT_FOUND
 661     }
 662     else if ( param == LBN_DBLCLK )
 663     {
 664         evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED;
 665         n = HitTest(ScreenToClient(wxGetMousePosition()));
 666     }
 667     else
 668     {
 669         // some event we're not interested in
 670         return false;
 671     }
 672
 673     // only send an event if we have a valid item
 674     return n != wxNOT_FOUND && SendEvent(evtType, n, true /* selection */);
 675 }
 676
 677 // ----------------------------------------------------------------------------
 678 // owner-drawn list boxes support
 679 // ----------------------------------------------------------------------------
 680
 681 #if wxUSE_OWNER_DRAWN
 682
 683 // misc overloaded methods
 684 // -----------------------
 685
 686 bool wxListBox::SetFont(const wxFont &font)
 687 {
 688     if ( HasFlag(wxLB_OWNERDRAW) )
 689     {
 690         const unsigned count = m_aItems.GetCount();
 691         for ( unsigned i = 0; i < count; i++ )
 692             m_aItems[i]->SetFont(font);
 693     }
 694
 695     wxListBoxBase::SetFont(font);
 696
 697     return true;
 698 }
 699
 700 bool wxListBox::GetItemRect(size_t n, wxRect& rect) const
 701 {
 702     wxCHECK_MSG( IsValid(n), false,
 703                  wxT("invalid index in wxListBox::GetItemRect") );
 704
 705     RECT rc;
 706
 707     if ( ListBox_GetItemRect(GetHwnd(), n, &rc) != LB_ERR )
 708     {
 709         rect = wxRectFromRECT(rc);
 710         return true;
 711     }
 712     else
 713     {
 714         // couldn't retrieve rect: for example, item isn't visible
 715         return false;
 716     }
 717 }
 718
 719 bool wxListBox::RefreshItem(size_t n)
 720 {
 721     wxRect rect;
 722     if ( !GetItemRect(n, rect) )
 723         return false;
 724
 725     RECT rc;
 726     wxCopyRectToRECT(rect, rc);
 727
 728     return ::InvalidateRect((HWND)GetHWND(), &rc, FALSE) == TRUE;
 729 }
 730
 731
 732 // drawing
 733 // -------
 734
 735 namespace
 736 {
 737     // space beneath/above each row in pixels
 738     static const int LISTBOX_EXTRA_SPACE = 1;
 739
 740 } // anonymous namespace
 741
 742 // the height is the same for all items
 743 // TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
 744
 745 // NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
 746 //     message is not yet sent when we get here!
 747 bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 748 {
 749     // only owner-drawn control should receive this message
 750     wxCHECK( HasFlag(wxLB_OWNERDRAW), false );
 751
 752     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 753
 754 #ifdef __WXWINCE__
 755     HDC hdc = GetDC(NULL);
 756 #else
 757     HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0);
 758 #endif
 759
 760     {
 761         wxDCTemp dc((WXHDC)hdc);
 762         dc.SetFont(GetFont());
 763
 764         pStruct->itemHeight = dc.GetCharHeight() + 2 * LISTBOX_EXTRA_SPACE;
 765         pStruct->itemWidth  = dc.GetCharWidth();
 766     }
 767
 768 #ifdef __WXWINCE__
 769     ReleaseDC(NULL, hdc);
 770 #else
 771     DeleteDC(hdc);
 772 #endif
 773
 774     return true;
 775 }
 776
 777 // forward the message to the appropriate item
 778 bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 779 {
 780     // only owner-drawn control should receive this message
 781     wxCHECK( HasFlag(wxLB_OWNERDRAW), false );
 782
 783     DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
 784
 785     // the item may be -1 for an empty listbox
 786     if ( pStruct->itemID == (UINT)-1 )
 787         return false;
 788
 789     wxListBoxItem *pItem = (wxListBoxItem *)m_aItems[pStruct->itemID];
 790
 791     wxDCTemp dc((WXHDC)pStruct->hDC);
 792
 793     return pItem->OnDrawItem(dc, wxRectFromRECT(pStruct->rcItem),
 794                              (wxOwnerDrawn::wxODAction)pStruct->itemAction,
 795                              (wxOwnerDrawn::wxODStatus)(pStruct->itemState | wxOwnerDrawn::wxODHidePrefix));
 796 }
 797
 798 #endif // wxUSE_OWNER_DRAWN
 799
 800 #endif // wxUSE_LISTBOX