src/msw/listbox.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        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 license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  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 #include "wx/window.h"
  24 #include "wx/msw/private.h"
  25
  26 #ifndef WX_PRECOMP
  27 #include "wx/listbox.h"
  28 #include "wx/settings.h"
  29 #include "wx/brush.h"
  30 #include "wx/font.h"
  31 #include "wx/dc.h"
  32 #include "wx/utils.h"
  33 #endif
  34
  35 #include <windowsx.h>
  36
  37 #ifdef __WXWINE__
  38   #if defined(GetWindowStyle)
  39     #undef GetWindowStyle
  40   #endif
  41 #endif
  42
  43 #include "wx/dynarray.h"
  44 #include "wx/log.h"
  45
  46 #if wxUSE_OWNER_DRAWN
  47     #include  "wx/ownerdrw.h"
  48 #endif
  49
  50 #ifndef __TWIN32__
  51     #if defined(__GNUWIN32__)
  52         #ifndef wxUSE_NORLANDER_HEADERS
  53             #include <wx/msw/gnuwin32/extra.h>
  54         #endif
  55     #endif
  56 #endif
  57
  58 #ifdef __WXWINE__
  59   #ifndef ListBox_SetItemData
  60     #define ListBox_SetItemData(hwndCtl, index, data) \
  61       ((int)(DWORD)SendMessage((hwndCtl), LB_SETITEMDATA, (WPARAM)(int)(index), (LPARAM)(data)))
  62   #endif
  63   #ifndef ListBox_GetHorizontalExtent
  64     #define ListBox_GetHorizontalExtent(hwndCtl) \
  65       ((int)(DWORD)SendMessage((hwndCtl), LB_GETHORIZONTALEXTENT, 0L, 0L))
  66   #endif
  67   #ifndef ListBox_GetSelCount
  68     #define ListBox_GetSelCount(hwndCtl) \
  69       ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELCOUNT, 0L, 0L))
  70   #endif
  71   #ifndef ListBox_GetSelItems
  72     #define ListBox_GetSelItems(hwndCtl, cItems, lpItems) \
  73       ((int)(DWORD)SendMessage((hwndCtl), LB_GETSELITEMS, (WPARAM)(int)(cItems), (LPARAM)(int *)(lpItems)))
  74   #endif
  75   #ifndef ListBox_GetTextLen
  76     #define ListBox_GetTextLen(hwndCtl, index) \
  77       ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXTLEN, (WPARAM)(int)(index), 0L))
  78   #endif
  79   #ifndef ListBox_GetText
  80     #define ListBox_GetText(hwndCtl, index, lpszBuffer) \
  81       ((int)(DWORD)SendMessage((hwndCtl), LB_GETTEXT, (WPARAM)(int)(index), (LPARAM)(LPCTSTR)(lpszBuffer)))
  82   #endif
  83 #endif
  84
  85 #if !USE_SHARED_LIBRARY
  86     IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
  87 #endif
  88
  89 // ============================================================================
  90 // list box item declaration and implementation
  91 // ============================================================================
  92
  93 #if wxUSE_OWNER_DRAWN
  94
  95 class wxListBoxItem : public wxOwnerDrawn
  96 {
  97 public:
  98     wxListBoxItem(const wxString& str = "");
  99 };
 100
 101 wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
 102 {
 103     // no bitmaps/checkmarks
 104     SetMarginWidth(0);
 105 }
 106
 107 wxOwnerDrawn *wxListBox::CreateItem(size_t n)
 108 {
 109     return new wxListBoxItem();
 110 }
 111
 112 #endif  //USE_OWNER_DRAWN
 113
 114 // ============================================================================
 115 // list box control implementation
 116 // ============================================================================
 117
 118 // ----------------------------------------------------------------------------
 119 // creation
 120 // ----------------------------------------------------------------------------
 121
 122 // Listbox item
 123 wxListBox::wxListBox()
 124 {
 125     m_noItems = 0;
 126     m_selected = 0;
 127 }
 128
 129 bool wxListBox::Create(wxWindow *parent,
 130                        wxWindowID id,
 131                        const wxPoint& pos,
 132                        const wxSize& size,
 133                        int n, const wxString choices[],
 134                        long style,
 135                        const wxValidator& validator,
 136                        const wxString& name)
 137 {
 138     m_noItems = 0;
 139     m_hWnd = 0;
 140     m_selected = 0;
 141
 142     SetName(name);
 143     SetValidator(validator);
 144
 145     if (parent)
 146         parent->AddChild(this);
 147
 148     wxSystemSettings settings;
 149     SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
 150     SetForegroundColour(parent->GetForegroundColour());
 151
 152     m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
 153
 154     int x = pos.x;
 155     int y = pos.y;
 156     int width = size.x;
 157     int height = size.y;
 158     m_windowStyle = style;
 159
 160     DWORD wstyle = WS_VISIBLE | WS_VSCROLL | WS_TABSTOP |
 161                    LBS_NOTIFY | LBS_HASSTRINGS;
 162     if (m_windowStyle & wxLB_MULTIPLE)
 163         wstyle |= LBS_MULTIPLESEL;
 164     else if (m_windowStyle & wxLB_EXTENDED)
 165         wstyle |= LBS_EXTENDEDSEL;
 166
 167     if (m_windowStyle & wxLB_ALWAYS_SB)
 168         wstyle |= LBS_DISABLENOSCROLL;
 169     if (m_windowStyle & wxLB_HSCROLL)
 170         wstyle |= WS_HSCROLL;
 171     if (m_windowStyle & wxLB_SORT)
 172         wstyle |= LBS_SORT;
 173
 174 #if wxUSE_OWNER_DRAWN
 175     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 176         // we don't support LBS_OWNERDRAWVARIABLE yet
 177         wstyle |= LBS_OWNERDRAWFIXED;
 178     }
 179 #endif
 180
 181     // Without this style, you get unexpected heights, so e.g. constraint layout
 182     // doesn't work properly
 183     wstyle |= LBS_NOINTEGRALHEIGHT;
 184
 185     bool want3D;
 186     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D);
 187
 188     // Even with extended styles, need to combine with WS_BORDER for them to
 189     // look right.
 190     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 191     {
 192         wstyle |= WS_BORDER;
 193     }
 194
 195     m_hWnd = (WXHWND)::CreateWindowEx(exStyle, wxT("LISTBOX"), NULL,
 196             wstyle | WS_CHILD,
 197             0, 0, 0, 0,
 198             (HWND)parent->GetHWND(), (HMENU)m_windowId,
 199             wxGetInstance(), NULL);
 200
 201     wxCHECK_MSG( m_hWnd, FALSE, wxT("Failed to create listbox") );
 202
 203 #if wxUSE_CTL3D
 204     if (want3D)
 205     {
 206         Ctl3dSubclassCtl(GetHwnd());
 207         m_useCtl3D = TRUE;
 208     }
 209 #endif
 210
 211     // Subclass again to catch messages
 212     SubclassWin(m_hWnd);
 213
 214     size_t ui;
 215     for (ui = 0; ui < (size_t)n; ui++) {
 216         Append(choices[ui]);
 217     }
 218
 219     if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
 220         SendMessage(GetHwnd(), LB_SETCURSEL, 0, 0);
 221
 222     SetFont(parent->GetFont());
 223
 224     SetSize(x, y, width, height);
 225
 226     Show(TRUE);
 227
 228     return TRUE;
 229 }
 230
 231 wxListBox::~wxListBox()
 232 {
 233 #if wxUSE_OWNER_DRAWN
 234     size_t uiCount = m_aItems.Count();
 235     while ( uiCount-- != 0 ) {
 236         delete m_aItems[uiCount];
 237     }
 238 #endif // wxUSE_OWNER_DRAWN
 239 }
 240
 241 void wxListBox::SetupColours()
 242 {
 243     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 244     SetForegroundColour(GetParent()->GetForegroundColour());
 245 }
 246
 247 // ----------------------------------------------------------------------------
 248 // implementation of wxListBoxBase methods
 249 // ----------------------------------------------------------------------------
 250
 251 void wxListBox::DoSetFirstItem(int N)
 252 {
 253     wxCHECK_RET( N >= 0 && N < m_noItems,
 254                  wxT("invalid index in wxListBox::SetFirstItem") );
 255
 256     SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0);
 257 }
 258
 259 void wxListBox::Delete(int N)
 260 {
 261     wxCHECK_RET( N >= 0 && N < m_noItems,
 262                  wxT("invalid index in wxListBox::Delete") );
 263
 264 #if wxUSE_OWNER_DRAWN
 265     delete m_aItems[N];
 266     m_aItems.Remove(N);
 267 #else // !wxUSE_OWNER_DRAWN
 268     if ( HasClientObjectData() )
 269     {
 270         delete GetClientObject(N);
 271     }
 272 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 273
 274     SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
 275     m_noItems--;
 276
 277     SetHorizontalExtent("");
 278 }
 279
 280 int wxListBox::DoAppend(const wxString& item)
 281 {
 282     int index = ListBox_AddString(GetHwnd(), item);
 283     m_noItems++;
 284
 285 #if wxUSE_OWNER_DRAWN
 286     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 287         wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
 288         pNewItem->SetName(item);
 289         m_aItems.Add(pNewItem);
 290         ListBox_SetItemData(GetHwnd(), index, pNewItem);
 291     }
 292 #endif
 293
 294     SetHorizontalExtent(item);
 295
 296     return index;
 297 }
 298
 299 void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData)
 300 {
 301     ShowWindow(GetHwnd(), SW_HIDE);
 302
 303     ListBox_ResetContent(GetHwnd());
 304
 305     m_noItems = choices.GetCount();
 306     int i;
 307     for (i = 0; i < m_noItems; i++)
 308     {
 309         ListBox_AddString(GetHwnd(), choices[i]);
 310         if ( clientData )
 311         {
 312 #if wxUSE_OWNER_DRAWN
 313             wxASSERT_MSG(clientData[i] == NULL,
 314                          wxT("Can't use client data with owner-drawn listboxes"));
 315 #else // !wxUSE_OWNER_DRAWN
 316             ListBox_SetItemData(GetHwnd(), i, clientData[i]);
 317 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 318         }
 319     }
 320
 321 #if wxUSE_OWNER_DRAWN
 322     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 323         // first delete old items
 324         size_t ui = m_aItems.Count();
 325         while ( ui-- != 0 ) {
 326             delete m_aItems[ui];
 327         }
 328         m_aItems.Empty();
 329
 330         // then create new ones
 331         for ( ui = 0; ui < (size_t)m_noItems; ui++ ) {
 332             wxOwnerDrawn *pNewItem = CreateItem(ui);
 333             pNewItem->SetName(choices[ui]);
 334             m_aItems.Add(pNewItem);
 335             ListBox_SetItemData(GetHwnd(), ui, pNewItem);
 336         }
 337     }
 338 #endif // wxUSE_OWNER_DRAWN
 339
 340     SetHorizontalExtent();
 341
 342     ShowWindow(GetHwnd(), SW_SHOW);
 343 }
 344
 345 int wxListBox::FindString(const wxString& s) const
 346 {
 347     int pos = ListBox_FindStringExact(GetHwnd(), (WPARAM)-1, s);
 348     if (pos == LB_ERR)
 349         return wxNOT_FOUND;
 350     else
 351         return pos;
 352 }
 353
 354 void wxListBox::Clear()
 355 {
 356 #if wxUSE_OWNER_DRAWN
 357     size_t uiCount = m_aItems.Count();
 358     while ( uiCount-- != 0 ) {
 359         delete m_aItems[uiCount];
 360     }
 361
 362     m_aItems.Clear();
 363 #else // !wxUSE_OWNER_DRAWN
 364     if ( HasClientObjectData() )
 365     {
 366         for ( size_t n = 0; n < (size_t)m_noItems; n++ )
 367         {
 368             delete GetClientObject(n);
 369         }
 370     }
 371 #endif // wxUSE_OWNER_DRAWN/!wxUSE_OWNER_DRAWN
 372
 373     ListBox_ResetContent(GetHwnd());
 374
 375     m_noItems = 0;
 376     SetHorizontalExtent();
 377 }
 378
 379 void wxListBox::SetSelection(int N, bool select)
 380 {
 381     wxCHECK_RET( N >= 0 && N < m_noItems,
 382                  wxT("invalid index in wxListBox::SetSelection") );
 383
 384     if ( HasMultipleSelection() )
 385     {
 386         SendMessage(GetHwnd(), LB_SETSEL, select, N);
 387     }
 388     else
 389     {
 390         SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0);
 391     }
 392 }
 393
 394 bool wxListBox::IsSelected(int N) const
 395 {
 396     wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
 397                  wxT("invalid index in wxListBox::Selected") );
 398
 399     return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
 400 }
 401
 402 wxClientData* wxListBox::DoGetItemClientObject(int n) const
 403 {
 404     return (wxClientData *)DoGetItemClientData(n);
 405 }
 406
 407 void *wxListBox::DoGetItemClientData(int n) const
 408 {
 409     wxCHECK_MSG( n >= 0 && n < m_noItems, NULL,
 410                  wxT("invalid index in wxListBox::GetClientData") );
 411
 412     return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0);
 413 }
 414
 415 void wxListBox::DoSetItemClientObject(int n, wxClientData* clientData)
 416 {
 417     DoSetItemClientData(n, clientData);
 418 }
 419
 420 void wxListBox::DoSetItemClientData(int n, void *clientData)
 421 {
 422     wxCHECK_RET( n >= 0 && n < m_noItems,
 423                  wxT("invalid index in wxListBox::SetClientData") );
 424
 425 #if wxUSE_OWNER_DRAWN
 426     if ( m_windowStyle & wxLB_OWNERDRAW )
 427     {
 428         // client data must be pointer to wxOwnerDrawn, otherwise we would crash
 429         // in OnMeasure/OnDraw.
 430         wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes"));
 431     }
 432 #endif // wxUSE_OWNER_DRAWN
 433
 434     if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR )
 435         wxLogDebug(wxT("LB_SETITEMDATA failed"));
 436 }
 437
 438 bool wxListBox::HasMultipleSelection() const
 439 {
 440     return (m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED);
 441 }
 442
 443 // Return number of selections and an array of selected integers
 444 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 445 {
 446     aSelections.Empty();
 447
 448     if ( HasMultipleSelection() )
 449     {
 450         int no_sel = ListBox_GetSelCount(GetHwnd());
 451         if (no_sel != 0) {
 452             int *selections = new int[no_sel];
 453             int rc = ListBox_GetSelItems(GetHwnd(), no_sel, selections);
 454
 455             wxCHECK_MSG(rc != LB_ERR, -1, wxT("ListBox_GetSelItems failed"));
 456
 457             aSelections.Alloc(no_sel);
 458             for ( int n = 0; n < no_sel; n++ )
 459                 aSelections.Add(selections[n]);
 460
 461             delete [] selections;
 462         }
 463
 464         return no_sel;
 465     }
 466     else  // single-selection listbox
 467     {
 468         aSelections.Add(ListBox_GetCurSel(GetHwnd()));
 469
 470         return 1;
 471     }
 472 }
 473
 474 // Get single selection, for single choice list items
 475 int wxListBox::GetSelection() const
 476 {
 477     wxCHECK_MSG( !HasMultipleSelection(),
 478                  -1,
 479                  wxT("GetSelection() can't be used with multiple-selection "
 480                     "listboxes, use GetSelections() instead.") );
 481
 482     return ListBox_GetCurSel(GetHwnd());
 483 }
 484
 485 // Find string for position
 486 wxString wxListBox::GetString(int N) const
 487 {
 488     wxCHECK_MSG( N >= 0 && N < m_noItems, "",
 489                  wxT("invalid index in wxListBox::GetClientData") );
 490
 491     int len = ListBox_GetTextLen(GetHwnd(), N);
 492
 493     // +1 for terminating NUL
 494     wxString result;
 495     ListBox_GetText(GetHwnd(), N, result.GetWriteBuf(len + 1));
 496     result.UngetWriteBuf();
 497
 498     return result;
 499 }
 500
 501 void
 502 wxListBox::DoInsertItems(const wxArrayString& items, int pos)
 503 {
 504     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 505                  wxT("invalid index in wxListBox::InsertItems") );
 506
 507     int nItems = items.GetCount();
 508     for ( int i = 0; i < nItems; i++ )
 509         ListBox_InsertString(GetHwnd(), i + pos, items[i]);
 510     m_noItems += nItems;
 511
 512     SetHorizontalExtent();
 513 }
 514
 515 void wxListBox::SetString(int N, const wxString& s)
 516 {
 517     wxCHECK_RET( N >= 0 && N < m_noItems,
 518                  wxT("invalid index in wxListBox::SetString") );
 519
 520     // remember the state of the item
 521     bool wasSelected = IsSelected(N);
 522
 523     void *oldData = NULL;
 524     wxClientData *oldObjData = NULL;
 525     if ( m_clientDataItemsType == ClientData_Void )
 526         oldData = GetClientData(N);
 527     else if ( m_clientDataItemsType == ClientData_Object )
 528         oldObjData = GetClientObject(N);
 529
 530     // delete and recreate it
 531     SendMessage(GetHwnd(), LB_DELETESTRING, N, 0);
 532
 533     int newN = N;
 534     if ( N == m_noItems - 1 )
 535         newN = -1;
 536
 537     ListBox_InsertString(GetHwnd(), newN, s);
 538
 539     // restore the client data
 540     if ( oldData )
 541         SetClientData(N, oldData);
 542     else if ( oldObjData )
 543         SetClientObject(N, oldObjData);
 544
 545     // we may have lost the selection
 546     if ( wasSelected )
 547         Select(N);
 548
 549 #if wxUSE_OWNER_DRAWN
 550     if ( m_windowStyle & wxLB_OWNERDRAW )
 551         // update item's text
 552         m_aItems[N]->SetName(s);
 553 #endif  //USE_OWNER_DRAWN
 554 }
 555
 556 int wxListBox::GetCount() const
 557 {
 558     return m_noItems;
 559 }
 560
 561 // ----------------------------------------------------------------------------
 562 // helpers
 563 // ----------------------------------------------------------------------------
 564
 565 // Windows-specific code to set the horizontal extent of the listbox, if
 566 // necessary. If s is non-NULL, it's used to calculate the horizontal extent.
 567 // Otherwise, all strings are used.
 568 void wxListBox::SetHorizontalExtent(const wxString& s)
 569 {
 570     // Only necessary if we want a horizontal scrollbar
 571     if (!(m_windowStyle & wxHSCROLL))
 572         return;
 573     TEXTMETRIC lpTextMetric;
 574
 575     if ( !s.IsEmpty() )
 576     {
 577         int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L);
 578         HDC dc = GetWindowDC(GetHwnd());
 579         HFONT oldFont = 0;
 580         if (GetFont().Ok() && GetFont().GetResourceHandle())
 581             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 582
 583         GetTextMetrics(dc, &lpTextMetric);
 584         SIZE extentXY;
 585         ::GetTextExtentPoint(dc, (LPTSTR) (const wxChar *)s, s.Length(), &extentXY);
 586         int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 587
 588         if (oldFont)
 589             ::SelectObject(dc, oldFont);
 590
 591         ReleaseDC(GetHwnd(), dc);
 592         if (extentX > existingExtent)
 593             SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
 594     }
 595     else
 596     {
 597         int largestExtent = 0;
 598         HDC dc = GetWindowDC(GetHwnd());
 599         HFONT oldFont = 0;
 600         if (GetFont().Ok() && GetFont().GetResourceHandle())
 601             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 602
 603         GetTextMetrics(dc, &lpTextMetric);
 604         int i;
 605         for (i = 0; i < m_noItems; i++)
 606         {
 607             int len = (int)SendMessage(GetHwnd(), LB_GETTEXT, i, (LONG)wxBuffer);
 608             wxBuffer[len] = 0;
 609             SIZE extentXY;
 610             ::GetTextExtentPoint(dc, (LPTSTR)wxBuffer, len, &extentXY);
 611             int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 612             if (extentX > largestExtent)
 613                 largestExtent = extentX;
 614         }
 615         if (oldFont)
 616             ::SelectObject(dc, oldFont);
 617
 618         ReleaseDC(GetHwnd(), dc);
 619         SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
 620     }
 621 }
 622
 623 wxSize wxListBox::DoGetBestSize()
 624 {
 625     // find the widest string
 626     int wLine;
 627     int wListbox = 0;
 628     for ( int i = 0; i < m_noItems; i++ )
 629     {
 630         wxString str(GetString(i));
 631         GetTextExtent(str, &wLine, NULL);
 632         if ( wLine > wListbox )
 633             wListbox = wLine;
 634     }
 635
 636     // give it some reasonable default value if there are no strings in the
 637     // list
 638     if ( wListbox == 0 )
 639         wListbox = 100;
 640
 641     // the listbox should be slightly larger than the widest string
 642     int cx, cy;
 643     wxGetCharSize(GetHWND(), &cx, &cy, &GetFont());
 644
 645     wListbox += 3*cx;
 646
 647     int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)*(wxMax(m_noItems, 7));
 648
 649     return wxSize(wListbox, hListbox);
 650 }
 651
 652 // ----------------------------------------------------------------------------
 653 // callbacks
 654 // ----------------------------------------------------------------------------
 655
 656 bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
 657 {
 658     /*
 659        if (param == LBN_SELCANCEL)
 660        {
 661        event.extraLong = FALSE;
 662        }
 663      */
 664     if (param == LBN_SELCHANGE)
 665     {
 666         wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
 667         wxArrayInt aSelections;
 668         int count = GetSelections(aSelections);
 669         if ( count > 0 )
 670         {
 671             event.m_commandInt = aSelections[0];
 672             event.m_clientData = GetClientData(event.m_commandInt);
 673             wxString str(GetString(event.m_commandInt));
 674             if (str != wxT(""))
 675             {
 676                 event.m_commandString = str;
 677             }
 678         }
 679         else
 680         {
 681             event.m_commandInt = -1;
 682             event.m_commandString.Empty();
 683         }
 684
 685         event.SetEventObject( this );
 686         ProcessCommand(event);
 687         return TRUE;
 688     }
 689     else if (param == LBN_DBLCLK)
 690     {
 691         wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
 692         event.SetEventObject( this );
 693         GetEventHandler()->ProcessEvent(event);
 694         return TRUE;
 695     }
 696
 697     return FALSE;
 698 }
 699
 700 WXHBRUSH wxListBox::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 701                                WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 702 {
 703 #if wxUSE_CTL3D
 704     if ( m_useCtl3D )
 705     {
 706         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 707         return (WXHBRUSH) hbrush;
 708     }
 709 #endif
 710
 711     if (GetParent()->GetTransparentBackground())
 712         SetBkMode((HDC) pDC, TRANSPARENT);
 713     else
 714         SetBkMode((HDC) pDC, OPAQUE);
 715
 716     ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 717     ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 718
 719     wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 720
 721     // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 722     // has a zero usage count.
 723     backgroundBrush->RealizeResource();
 724     return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 725 }
 726
 727 // ----------------------------------------------------------------------------
 728 // wxCheckListBox support
 729 // ----------------------------------------------------------------------------
 730
 731 #if wxUSE_OWNER_DRAWN
 732
 733 // drawing
 734 // -------
 735
 736 // space beneath/above each row in pixels
 737 // "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
 738 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
 739
 740 // the height is the same for all items
 741 // TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes
 742
 743 // NB: can't forward this to wxListBoxItem because LB_SETITEMDATA
 744 //     message is not yet sent when we get here!
 745 bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item)
 746 {
 747     // only owner-drawn control should receive this message
 748     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 749
 750     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 751
 752     wxDC dc;
 753     dc.SetHDC((WXHDC)CreateIC(wxT("DISPLAY"), NULL, NULL, 0));
 754     dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
 755
 756     pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
 757     pStruct->itemWidth  = dc.GetCharWidth();
 758
 759     return TRUE;
 760 }
 761
 762 // forward the message to the appropriate item
 763 bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 764 {
 765     // only owner-drawn control should receive this message
 766     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 767
 768     DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
 769
 770     long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID);
 771
 772     wxCHECK( data && (data != LB_ERR), FALSE );
 773
 774     wxListBoxItem *pItem = (wxListBoxItem *)data;
 775
 776     wxDC dc;
 777     dc.SetHDC((WXHDC)pStruct->hDC, FALSE);
 778     wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
 779             wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
 780
 781     return pItem->OnDrawItem(dc, rect,
 782             (wxOwnerDrawn::wxODAction)pStruct->itemAction,
 783             (wxOwnerDrawn::wxODStatus)pStruct->itemState);
 784 }
 785
 786 #endif
 787     // wxUSE_OWNER_DRAWN