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 #ifndef WX_PRECOMP
  24     #include "wx/listbox.h"
  25     #include "wx/settings.h"
  26     #include "wx/brush.h"
  27     #include "wx/font.h"
  28     #include "wx/dc.h"
  29 #endif
  30
  31 #include "wx/msw/private.h"
  32
  33 #include <windows.h>
  34 #include <windowsx.h>
  35
  36 #ifndef __TWIN32__
  37     #ifdef __GNUWIN32__
  38         #include <wx/msw/gnuwin32/extra.h>
  39     #endif
  40 #endif
  41
  42 #ifdef GetCharWidth
  43     #undef GetCharWidth
  44 #endif
  45
  46 #if wxUSE_OWNER_DRAWN
  47     #include  "wx/ownerdrw.h"
  48 #endif
  49
  50 #include "wx/dynarray.h"
  51 #include "wx/log.h"
  52
  53 #if !USE_SHARED_LIBRARY
  54     IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl)
  55 #endif
  56
  57 // ============================================================================
  58 // list box item declaration and implementation
  59 // ============================================================================
  60
  61 #if wxUSE_OWNER_DRAWN
  62
  63 class wxListBoxItem : public wxOwnerDrawn
  64 {
  65 public:
  66     wxListBoxItem(const wxString& str = "");
  67 };
  68
  69 wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, FALSE)
  70 {
  71     // no bitmaps/checkmarks
  72     SetMarginWidth(0);
  73 }
  74
  75 wxOwnerDrawn *wxListBox::CreateItem(size_t n)
  76 {
  77     return new wxListBoxItem();
  78 }
  79
  80 #endif  //USE_OWNER_DRAWN
  81
  82 // ============================================================================
  83 // list box control implementation
  84 // ============================================================================
  85
  86 // this macro is dangerous but still better than tons of (HWND)GetHWND()
  87 #define   hwnd    (HWND)GetHWND()
  88
  89 bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
  90 {
  91     /*
  92        if (param == LBN_SELCANCEL)
  93        {
  94        event.extraLong = FALSE;
  95        }
  96      */
  97     if (param == LBN_SELCHANGE)
  98     {
  99         wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, m_windowId);
 100         wxArrayInt aSelections;
 101         int count = GetSelections(aSelections);
 102         if ( count > 0 )
 103         {
 104             event.m_commandInt = aSelections[0] ;
 105             event.m_clientData = GetClientData(event.m_commandInt);
 106             wxString str(GetString(event.m_commandInt));
 107             if (str != "")
 108             {
 109                 event.m_commandString = str;
 110             }
 111         }
 112         else
 113         {
 114             event.m_commandInt = -1 ;
 115             event.m_commandString.Empty();
 116         }
 117
 118         event.SetEventObject( this );
 119         ProcessCommand(event);
 120         return TRUE;
 121     }
 122     else if (param == LBN_DBLCLK)
 123     {
 124         wxCommandEvent event(wxEVT_COMMAND_LISTBOX_DOUBLECLICKED, m_windowId);
 125         event.SetEventObject( this );
 126         GetEventHandler()->ProcessEvent(event) ;
 127         return TRUE;
 128     }
 129
 130     return FALSE;
 131 }
 132
 133     // Listbox item
 134 wxListBox::wxListBox()
 135 {
 136     m_noItems = 0;
 137     m_selected = 0;
 138 }
 139
 140 bool wxListBox::Create(wxWindow *parent,
 141                        wxWindowID id,
 142                        const wxPoint& pos,
 143                        const wxSize& size,
 144                        int n, const wxString choices[],
 145                        long style,
 146                        const wxValidator& validator,
 147                        const wxString& name)
 148 {
 149     m_noItems = 0;
 150     m_hWnd = 0;
 151     m_selected = 0;
 152
 153     SetName(name);
 154     SetValidator(validator);
 155
 156     if (parent)
 157         parent->AddChild(this);
 158
 159     wxSystemSettings settings;
 160     SetBackgroundColour(settings.GetSystemColour(wxSYS_COLOUR_WINDOW));
 161     SetForegroundColour(parent->GetForegroundColour());
 162
 163     m_windowId = ( id == -1 ) ? (int)NewControlId() : id;
 164
 165     int x = pos.x;
 166     int y = pos.y;
 167     int width = size.x;
 168     int height = size.y;
 169     m_windowStyle = style;
 170
 171     DWORD wstyle = WS_VSCROLL | WS_TABSTOP | LBS_NOTIFY | LBS_HASSTRINGS;
 172     if (m_windowStyle & wxLB_MULTIPLE)
 173         wstyle |= LBS_MULTIPLESEL;
 174     else if (m_windowStyle & wxLB_EXTENDED)
 175         wstyle |= LBS_EXTENDEDSEL;
 176
 177     if (m_windowStyle & wxLB_ALWAYS_SB)
 178         wstyle |= LBS_DISABLENOSCROLL ;
 179     if (m_windowStyle & wxLB_HSCROLL)
 180         wstyle |= WS_HSCROLL;
 181     if (m_windowStyle & wxLB_SORT)
 182         wstyle |= LBS_SORT;
 183
 184 #if wxUSE_OWNER_DRAWN
 185     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 186         // we don't support LBS_OWNERDRAWVARIABLE yet
 187         wstyle |= LBS_OWNERDRAWFIXED;
 188     }
 189 #endif
 190
 191     // Without this style, you get unexpected heights, so e.g. constraint layout
 192     // doesn't work properly
 193     wstyle |= LBS_NOINTEGRALHEIGHT;
 194
 195     bool want3D;
 196     WXDWORD exStyle = Determine3DEffects(WS_EX_CLIENTEDGE, &want3D) ;
 197
 198     // Even with extended styles, need to combine with WS_BORDER
 199     // for them to look right.
 200     if ( want3D || wxStyleHasBorder(m_windowStyle) )
 201     {
 202         wstyle |= WS_BORDER;
 203     }
 204
 205     m_hWnd = (WXHWND)::CreateWindowEx(exStyle, "LISTBOX", NULL,
 206             wstyle | WS_CHILD,
 207             0, 0, 0, 0,
 208             (HWND)parent->GetHWND(), (HMENU)m_windowId,
 209             wxGetInstance(), NULL);
 210
 211     wxCHECK_MSG( m_hWnd, FALSE, "Failed to create listbox" );
 212
 213 #if wxUSE_CTL3D
 214     if (want3D)
 215     {
 216         Ctl3dSubclassCtl(hwnd);
 217         m_useCtl3D = TRUE;
 218     }
 219 #endif
 220
 221     // Subclass again to catch messages
 222     SubclassWin(m_hWnd);
 223
 224     size_t ui;
 225     for (ui = 0; ui < (size_t)n; ui++) {
 226         Append(choices[ui]);
 227     }
 228
 229     if ( (m_windowStyle & wxLB_MULTIPLE) == 0 )
 230         SendMessage(hwnd, LB_SETCURSEL, 0, 0);
 231
 232     SetFont(parent->GetFont());
 233
 234     SetSize(x, y, width, height);
 235
 236     Show(TRUE);
 237
 238     return TRUE;
 239 }
 240
 241 wxListBox::~wxListBox()
 242 {
 243 #if wxUSE_OWNER_DRAWN
 244     size_t uiCount = m_aItems.Count();
 245     while ( uiCount-- != 0 ) {
 246         delete m_aItems[uiCount];
 247     }
 248 #endif // wxUSE_OWNER_DRAWN
 249 }
 250
 251 void wxListBox::SetupColours()
 252 {
 253     SetBackgroundColour(wxSystemSettings::GetSystemColour(wxSYS_COLOUR_WINDOW));
 254     SetForegroundColour(GetParent()->GetForegroundColour());
 255 }
 256
 257 void wxListBox::SetFirstItem(int N)
 258 {
 259     wxCHECK_RET( N >= 0 && N < m_noItems,
 260                  "invalid index in wxListBox::SetFirstItem" );
 261
 262     SendMessage(hwnd,LB_SETTOPINDEX,(WPARAM)N,(LPARAM)0) ;
 263 }
 264
 265 void wxListBox::SetFirstItem(const wxString& s)
 266 {
 267     int N = FindString(s) ;
 268
 269     if ( N >= 0 )
 270         SetFirstItem(N) ;
 271 }
 272
 273 void wxListBox::Delete(int N)
 274 {
 275     wxCHECK_RET( N >= 0 && N < m_noItems,
 276                  "invalid index in wxListBox::Delete" );
 277
 278     SendMessage(hwnd, LB_DELETESTRING, N, 0);
 279     m_noItems--;
 280
 281     SetHorizontalExtent("");
 282 }
 283
 284 void wxListBox::Append(const wxString& item)
 285 {
 286     int index = ListBox_AddString(hwnd, item);
 287     m_noItems ++;
 288
 289 #if wxUSE_OWNER_DRAWN
 290     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 291         wxOwnerDrawn *pNewItem = CreateItem(index); // dummy argument
 292         pNewItem->SetName(item);
 293         m_aItems.Add(pNewItem);
 294         ListBox_SetItemData(hwnd, index, pNewItem);
 295     }
 296 #endif
 297
 298     SetHorizontalExtent(item);
 299 }
 300
 301 void wxListBox::Append(const wxString& item, char *Client_data)
 302 {
 303     int index = ListBox_AddString(hwnd, item);
 304     m_noItems ++;
 305
 306 #if wxUSE_OWNER_DRAWN
 307     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 308         // client data must be pointer to wxOwnerDrawn, otherwise we would crash
 309         // in OnMeasure/OnDraw.
 310         wxFAIL_MSG("Can't use client data with owner-drawn listboxes");
 311     }
 312     else
 313 #endif
 314
 315     ListBox_SetItemData(hwnd, index, Client_data);
 316
 317     SetHorizontalExtent(item);
 318 }
 319
 320 void wxListBox::Set(int n, const wxString *choices, char** clientData)
 321 {
 322     ShowWindow(hwnd, SW_HIDE);
 323     ListBox_ResetContent(hwnd);
 324     int i;
 325     for (i = 0; i < n; i++)
 326     {
 327         ListBox_AddString(hwnd, choices[i]);
 328         if ( clientData )
 329             ListBox_SetItemData(hwnd, i, clientData[i]);
 330     }
 331     m_noItems = n;
 332
 333 #if wxUSE_OWNER_DRAWN
 334     if ( m_windowStyle & wxLB_OWNERDRAW ) {
 335         // first delete old items
 336         size_t ui = m_aItems.Count();
 337         while ( ui-- != 0 ) {
 338             delete m_aItems[ui];
 339         }
 340         m_aItems.Empty();
 341
 342         // then create new ones
 343         for (ui = 0; ui < (size_t)n; ui++) {
 344             wxOwnerDrawn *pNewItem = CreateItem(ui);
 345             pNewItem->SetName(choices[ui]);
 346             m_aItems.Add(pNewItem);
 347             ListBox_SetItemData(hwnd, ui, pNewItem);
 348
 349             wxASSERT_MSG(clientData[ui] == NULL,
 350                     "Can't use client data with owner-drawn listboxes");
 351         }
 352     }
 353 #endif
 354
 355     SetHorizontalExtent("");
 356     ShowWindow(hwnd, SW_SHOW);
 357 }
 358
 359 int wxListBox::FindString(const wxString& s) const
 360 {
 361     int pos = ListBox_FindStringExact(hwnd, (WPARAM)-1, s);
 362     if (pos == LB_ERR)
 363         return -1;
 364     else
 365         return pos;
 366 }
 367
 368 void wxListBox::Clear()
 369 {
 370     ListBox_ResetContent(hwnd);
 371
 372 #if wxUSE_OWNER_DRAWN
 373     size_t uiCount = m_aItems.Count();
 374     while ( uiCount-- != 0 ) {
 375         delete m_aItems[uiCount];
 376     }
 377
 378     m_aItems.Clear();
 379 #endif // wxUSE_OWNER_DRAWN
 380
 381     m_noItems = 0;
 382     ListBox_GetHorizontalExtent(hwnd);
 383 }
 384
 385 void wxListBox::SetSelection(int N, bool select)
 386 {
 387     wxCHECK_RET( N >= 0 && N < m_noItems,
 388                  "invalid index in wxListBox::SetSelection" );
 389
 390     if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
 391         SendMessage(hwnd, LB_SETSEL, select, N);
 392     else
 393     {
 394         int N1 = N;
 395         if (!select)
 396             N1 = -1;
 397         SendMessage(hwnd, LB_SETCURSEL, N1, 0);
 398     }
 399 }
 400
 401 bool wxListBox::Selected(int N) const
 402 {
 403     wxCHECK_MSG( N >= 0 && N < m_noItems, FALSE,
 404                  "invalid index in wxListBox::Selected" );
 405
 406     return SendMessage(hwnd, LB_GETSEL, N, 0) == 0 ? FALSE : TRUE;
 407 }
 408
 409 void wxListBox::Deselect(int N)
 410 {
 411     wxCHECK_RET( N >= 0 && N < m_noItems,
 412                  "invalid index in wxListBox::Deselect" );
 413
 414     if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
 415         SendMessage(hwnd, LB_SETSEL, FALSE, N);
 416 }
 417
 418 char *wxListBox::GetClientData(int N) const
 419 {
 420     wxCHECK_MSG( N >= 0 && N < m_noItems, NULL,
 421                  "invalid index in wxListBox::GetClientData" );
 422
 423     return (char *)SendMessage(hwnd, LB_GETITEMDATA, N, 0);
 424 }
 425
 426 void wxListBox::SetClientData(int N, char *Client_data)
 427 {
 428     wxCHECK_RET( N >= 0 && N < m_noItems,
 429                  "invalid index in wxListBox::SetClientData" );
 430
 431     if ( ListBox_SetItemData(hwnd, N, Client_data) == LB_ERR )
 432         wxLogDebug("LB_SETITEMDATA failed");
 433 }
 434
 435 // Return number of selections and an array of selected integers
 436 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 437 {
 438     aSelections.Empty();
 439
 440     if ((m_windowStyle & wxLB_MULTIPLE) || (m_windowStyle & wxLB_EXTENDED))
 441     {
 442         int no_sel = ListBox_GetSelCount(hwnd);
 443         if (no_sel != 0) {
 444             int *selections = new int[no_sel];
 445             if ( ListBox_GetSelItems(hwnd, no_sel, selections) == LB_ERR ) {
 446                 wxFAIL_MSG("This listbox can't have single-selection style!");
 447             }
 448
 449             aSelections.Alloc(no_sel);
 450             for ( int n = 0; n < no_sel; n++ )
 451                 aSelections.Add(selections[n]);
 452
 453             delete [] selections;
 454         }
 455
 456         return no_sel;
 457     }
 458     else  // single-selection listbox
 459     {
 460         aSelections.Add(ListBox_GetCurSel(hwnd));
 461
 462         return 1;
 463     }
 464 }
 465
 466 // Get single selection, for single choice list items
 467 int wxListBox::GetSelection() const
 468 {
 469     wxCHECK_MSG( !(m_windowStyle & wxLB_MULTIPLE) &&
 470                  !(m_windowStyle & wxLB_EXTENDED),
 471                  -1,
 472                  "GetSelection() can't be used with multiple-selection "
 473                  "listboxes, use GetSelections() instead." );
 474
 475     return ListBox_GetCurSel(hwnd);
 476 }
 477
 478 // Find string for position
 479 wxString wxListBox::GetString(int N) const
 480 {
 481     wxCHECK_MSG( N >= 0 && N < m_noItems, "",
 482                  "invalid index in wxListBox::GetClientData" );
 483
 484     int len = ListBox_GetTextLen(hwnd, N);
 485
 486     // +1 for terminating NUL
 487     wxString result;
 488     ListBox_GetText(hwnd, N, result.GetWriteBuf(len + 1));
 489     result.UngetWriteBuf();
 490
 491     return result;
 492 }
 493
 494 void wxListBox::DoSetSize(int x, int y, int width, int height, int sizeFlags)
 495 {
 496     int currentX, currentY;
 497     GetPosition(&currentX, &currentY);
 498
 499     int x1 = x;
 500     int y1 = y;
 501     int w1 = width;
 502     int h1 = height;
 503
 504     if (x == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 505         x1 = currentX;
 506     if (y == -1 || (sizeFlags & wxSIZE_ALLOW_MINUS_ONE))
 507         y1 = currentY;
 508
 509     AdjustForParentClientOrigin(x1, y1, sizeFlags);
 510
 511     // If we're prepared to use the existing size, then...
 512     if (width == -1 && height == -1 && ((sizeFlags & wxSIZE_AUTO) != wxSIZE_AUTO))
 513     {
 514         GetSize(&w1, &h1);
 515     }
 516
 517     int cx; // button font dimensions
 518     int cy;
 519
 520     wxGetCharSize(GetHWND(), &cx, &cy, & this->GetFont());
 521
 522     float control_width, control_height, control_x, control_y;
 523
 524     // Deal with default size (using -1 values)
 525     if (w1<=0)
 526         w1 = DEFAULT_ITEM_WIDTH;
 527
 528     if (h1<=0)
 529         h1 = DEFAULT_ITEM_HEIGHT;
 530
 531     control_x = (float)x1;
 532     control_y = (float)y1;
 533     control_width = (float)w1;
 534     control_height = (float)h1;
 535
 536     // Calculations may have made size too small
 537     if (control_height <= 0)
 538         control_height = (float)DEFAULT_ITEM_HEIGHT;
 539
 540     if (control_width <= 0)
 541         control_width = (float)DEFAULT_ITEM_WIDTH;
 542
 543     MoveWindow(hwnd,
 544                (int)control_x, (int)control_y,
 545                (int)control_width, (int)control_height,
 546                TRUE);
 547
 548 }
 549
 550 // Windows-specific code to set the horizontal extent of
 551 // the listbox, if necessary. If s is non-NULL, it's
 552 // used to calculate the horizontal extent.
 553 // Otherwise, all strings are used.
 554 void wxListBox::SetHorizontalExtent(const wxString& s)
 555 {
 556     // Only necessary if we want a horizontal scrollbar
 557     if (!(m_windowStyle & wxHSCROLL))
 558         return;
 559     TEXTMETRIC lpTextMetric;
 560
 561     if (s != "")
 562     {
 563         int existingExtent = (int)SendMessage(hwnd, LB_GETHORIZONTALEXTENT, 0, 0L);
 564         HDC dc = GetWindowDC(hwnd);
 565         HFONT oldFont = 0;
 566         if (GetFont().Ok() && GetFont().GetResourceHandle())
 567             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 568
 569         GetTextMetrics(dc, &lpTextMetric);
 570         SIZE extentXY;
 571         ::GetTextExtentPoint(dc, (LPSTR) (const char *)s, s.Length(), &extentXY);
 572         int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 573
 574         if (oldFont)
 575             ::SelectObject(dc, oldFont);
 576
 577         ReleaseDC(hwnd, dc);
 578         if (extentX > existingExtent)
 579             SendMessage(hwnd, LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L);
 580         return;
 581     }
 582     else
 583     {
 584         int largestExtent = 0;
 585         HDC dc = GetWindowDC(hwnd);
 586         HFONT oldFont = 0;
 587         if (GetFont().Ok() && GetFont().GetResourceHandle())
 588             oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle());
 589
 590         GetTextMetrics(dc, &lpTextMetric);
 591         int i;
 592         for (i = 0; i < m_noItems; i++)
 593         {
 594             int len = (int)SendMessage(hwnd, LB_GETTEXT, i, (LONG)wxBuffer);
 595             wxBuffer[len] = 0;
 596             SIZE extentXY;
 597             ::GetTextExtentPoint(dc, (LPSTR)wxBuffer, len, &extentXY);
 598             int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth);
 599             if (extentX > largestExtent)
 600                 largestExtent = extentX;
 601         }
 602         if (oldFont)
 603             ::SelectObject(dc, oldFont);
 604
 605         ReleaseDC(hwnd, dc);
 606         SendMessage(hwnd, LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L);
 607     }
 608 }
 609
 610 void
 611 wxListBox::InsertItems(int nItems, const wxString items[], int pos)
 612 {
 613     wxCHECK_RET( pos >= 0 && pos <= m_noItems,
 614                  "invalid index in wxListBox::InsertItems" );
 615
 616     int i;
 617     for (i = 0; i < nItems; i++)
 618         ListBox_InsertString(hwnd, i + pos, items[i]);
 619     m_noItems += nItems;
 620
 621     SetHorizontalExtent("");
 622 }
 623
 624 void wxListBox::SetString(int N, const wxString& s)
 625 {
 626     wxCHECK_RET( N >= 0 && N < m_noItems,
 627                  "invalid index in wxListBox::SetString" );
 628
 629     int sel = -1;
 630     if (!(m_windowStyle & wxLB_MULTIPLE) && !(m_windowStyle & wxLB_EXTENDED))
 631         sel = GetSelection();
 632
 633     char *oldData = (char *)wxListBox::GetClientData(N);
 634
 635     SendMessage(hwnd, LB_DELETESTRING, N, 0);
 636
 637     int newN = N;
 638     if (N == (m_noItems - 1))
 639         newN = -1;
 640
 641     SendMessage(hwnd, LB_INSERTSTRING, newN, (LPARAM) (const char *)s);
 642     if (oldData)
 643         wxListBox::SetClientData(N, oldData);
 644
 645     // Selection may have changed
 646     if (sel >= 0)
 647         SetSelection(sel);
 648
 649 #if       wxUSE_OWNER_DRAWN
 650     if ( m_windowStyle & wxLB_OWNERDRAW )
 651         // update item's text
 652         m_aItems[N]->SetName(s);
 653 #endif  //USE_OWNER_DRAWN
 654 }
 655
 656 int wxListBox::Number () const
 657 {
 658     return m_noItems;
 659 }
 660
 661 // For single selection items only
 662 wxString wxListBox::GetStringSelection () const
 663 {
 664     int sel = GetSelection ();
 665     if (sel > -1)
 666         return this->GetString (sel);
 667     else
 668         return wxString("");
 669 }
 670
 671 bool wxListBox::SetStringSelection (const wxString& s, bool flag)
 672 {
 673     int sel = FindString (s);
 674     if (sel > -1)
 675     {
 676         SetSelection (sel, flag);
 677         return TRUE;
 678     }
 679     else
 680         return FALSE;
 681 }
 682
 683 // Is this the right thing? Won't setselection generate a command
 684 // event too? No! It'll just generate a setselection event.
 685 // But we still can't have this being called whenever a real command
 686 // is generated, because it sets the selection, which will already
 687 // have been done! (Unless we have an optional argument for calling
 688 // by the actual window system, or a separate function, ProcessCommand)
 689 void wxListBox::Command (wxCommandEvent & event)
 690 {
 691     if (event.m_extraLong)
 692         SetSelection (event.m_commandInt);
 693     else
 694     {
 695         Deselect (event.m_commandInt);
 696         return;
 697     }
 698     ProcessCommand (event);
 699 }
 700
 701 WXHBRUSH wxListBox::OnCtlColor(WXHDC pDC, WXHWND pWnd, WXUINT nCtlColor,
 702         WXUINT message, WXWPARAM wParam, WXLPARAM lParam)
 703 {
 704 #if wxUSE_CTL3D
 705     if ( m_useCtl3D )
 706     {
 707         HBRUSH hbrush = Ctl3dCtlColorEx(message, wParam, lParam);
 708         return (WXHBRUSH) hbrush;
 709     }
 710 #endif
 711
 712     if (GetParent()->GetTransparentBackground())
 713         SetBkMode((HDC) pDC, TRANSPARENT);
 714     else
 715         SetBkMode((HDC) pDC, OPAQUE);
 716
 717     ::SetBkColor((HDC) pDC, RGB(GetBackgroundColour().Red(), GetBackgroundColour().Green(), GetBackgroundColour().Blue()));
 718     ::SetTextColor((HDC) pDC, RGB(GetForegroundColour().Red(), GetForegroundColour().Green(), GetForegroundColour().Blue()));
 719
 720     wxBrush *backgroundBrush = wxTheBrushList->FindOrCreateBrush(GetBackgroundColour(), wxSOLID);
 721
 722     // Note that this will be cleaned up in wxApp::OnIdle, if backgroundBrush
 723     // has a zero usage count.
 724     backgroundBrush->RealizeResource();
 725     return (WXHBRUSH) backgroundBrush->GetResourceHandle();
 726 }
 727
 728 long wxListBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 729 {
 730     return wxControl::MSWWindowProc(nMsg, wParam, lParam);
 731 }
 732
 733 #if wxUSE_OWNER_DRAWN
 734
 735 // drawing
 736 // -------
 737
 738 // space beneath/above each row in pixels
 739 // "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly.
 740 #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE    (1)
 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( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 751
 752     MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item;
 753
 754     wxDC dc;
 755     dc.SetHDC((WXHDC)CreateIC("DISPLAY", NULL, NULL, 0));
 756     dc.SetFont(wxSystemSettings::GetSystemFont(wxSYS_ANSI_VAR_FONT));
 757
 758     pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE;
 759     pStruct->itemWidth  = dc.GetCharWidth();
 760
 761     return TRUE;
 762 }
 763
 764 // forward the message to the appropriate item
 765 bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item)
 766 {
 767     // only owner-drawn control should receive this message
 768     wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), FALSE );
 769
 770     DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item;
 771
 772     long data = ListBox_GetItemData(hwnd, pStruct->itemID);
 773
 774     wxCHECK( data && (data != LB_ERR), FALSE );
 775
 776     wxListBoxItem *pItem = (wxListBoxItem *)data;
 777
 778     wxDC dc;
 779     dc.SetHDC((WXHDC)pStruct->hDC, FALSE);
 780     wxRect rect(wxPoint(pStruct->rcItem.left, pStruct->rcItem.top),
 781             wxPoint(pStruct->rcItem.right, pStruct->rcItem.bottom));
 782
 783     return pItem->OnDrawItem(dc, rect,
 784             (wxOwnerDrawn::wxODAction)pStruct->itemAction,
 785             (wxOwnerDrawn::wxODStatus)pStruct->itemState);
 786 }
 787
 788 #endif
 789     // wxUSE_OWNER_DRAWN