src/generic/odcombo.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/generic/odcombo.cpp
   3 // Purpose:     wxOwnerDrawnComboBox, wxVListBoxComboPopup
   4 // Author:      Jaakko Salli
   5 // Modified by:
   6 // Created:     Apr-30-2006
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2005 Jaakko Salli
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23     #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_ODCOMBOBOX
  27
  28 #include "wx/odcombo.h"
  29
  30 #ifndef WX_PRECOMP
  31     #include "wx/log.h"
  32     #include "wx/combobox.h"
  33     #include "wx/dcclient.h"
  34     #include "wx/settings.h"
  35     #include "wx/dialog.h"
  36 #endif
  37
  38 #include "wx/combo.h"
  39
  40 // ============================================================================
  41 // implementation
  42 // ============================================================================
  43
  44 // time in milliseconds before partial completion buffer drops
  45 #define wxODCB_PARTIAL_COMPLETION_TIME 1000
  46
  47 // ----------------------------------------------------------------------------
  48 // wxVListBoxComboPopup is a wxVListBox customized to act as a popup control
  49 //
  50 // ----------------------------------------------------------------------------
  51
  52
  53 BEGIN_EVENT_TABLE(wxVListBoxComboPopup, wxVListBox)
  54     EVT_MOTION(wxVListBoxComboPopup::OnMouseMove)
  55     EVT_KEY_DOWN(wxVListBoxComboPopup::OnKey)
  56     EVT_LEFT_UP(wxVListBoxComboPopup::OnLeftClick)
  57 END_EVENT_TABLE()
  58
  59
  60 void wxVListBoxComboPopup::Init()
  61 {
  62     m_widestWidth = 0;
  63     m_widestItem = -1;
  64     m_widthsDirty = false;
  65     m_findWidest = false;
  66     m_itemHeight = 0;
  67     m_value = -1;
  68     m_itemHover = -1;
  69     m_clientDataItemsType = wxClientData_None;
  70     m_partialCompletionString = wxEmptyString;
  71 }
  72
  73 bool wxVListBoxComboPopup::Create(wxWindow* parent)
  74 {
  75     if ( !wxVListBox::Create(parent,
  76                              wxID_ANY,
  77                              wxDefaultPosition,
  78                              wxDefaultSize,
  79                              wxBORDER_SIMPLE | wxLB_INT_HEIGHT | wxWANTS_CHARS) )
  80         return false;
  81
  82     m_useFont = m_combo->GetFont();
  83
  84     wxVListBox::SetItemCount(m_strings.GetCount());
  85
  86     // TODO: Move this to SetFont
  87     m_itemHeight = GetCharHeight() + 0;
  88
  89     return true;
  90 }
  91
  92 wxVListBoxComboPopup::~wxVListBoxComboPopup()
  93 {
  94     Clear();
  95 }
  96
  97 bool wxVListBoxComboPopup::LazyCreate()
  98 {
  99     // NB: There is a bug with wxVListBox that can be avoided by creating
 100     //     it later (bug causes empty space to be shown if initial selection
 101     //     is at the end of a list longer than the control can show at once).
 102     return true;
 103 }
 104
 105 // paint the control itself
 106 void wxVListBoxComboPopup::PaintComboControl( wxDC& dc, const wxRect& rect )
 107 {
 108     if ( !(m_combo->GetWindowStyle() & wxODCB_STD_CONTROL_PAINT) )
 109     {
 110         int flags = wxODCB_PAINTING_CONTROL;
 111
 112         if ( m_combo->ShouldDrawFocus() )
 113             flags |= wxODCB_PAINTING_SELECTED;
 114
 115         OnDrawBg(dc, rect, m_value, flags);
 116
 117         if ( m_value >= 0 )
 118         {
 119             OnDrawItem(dc,rect,m_value,wxODCB_PAINTING_CONTROL);
 120             return;
 121         }
 122     }
 123
 124     wxComboPopup::PaintComboControl(dc,rect);
 125 }
 126
 127 void wxVListBoxComboPopup::OnDrawItem(wxDC& dc, const wxRect& rect, size_t n) const
 128 {
 129     // TODO: Maybe this code could be moved to wxVListBox::OnPaint?
 130     dc.SetFont(m_useFont);
 131
 132     // Set correct text colour for selected items
 133     if ( wxVListBox::GetSelection() == (int) n )
 134         dc.SetTextForeground( wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT) );
 135     else
 136         dc.SetTextForeground( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT) );
 137
 138     OnDrawItem(dc,rect,(int)n,0);
 139 }
 140
 141 wxCoord wxVListBoxComboPopup::OnMeasureItem(size_t n) const
 142 {
 143     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 144
 145     wxASSERT_MSG( combo->IsKindOf(CLASSINFO(wxOwnerDrawnComboBox)),
 146                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 147
 148     wxCoord h = combo->OnMeasureItem(n);
 149     if ( h < 0 )
 150         h = m_itemHeight;
 151     return h;
 152 }
 153
 154 wxCoord wxVListBoxComboPopup::OnMeasureItemWidth(size_t n) const
 155 {
 156     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 157
 158     wxASSERT_MSG( combo->IsKindOf(CLASSINFO(wxOwnerDrawnComboBox)),
 159                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 160
 161     return combo->OnMeasureItemWidth(n);
 162 }
 163
 164 void wxVListBoxComboPopup::OnDrawBg( wxDC& dc,
 165                                      const wxRect& rect,
 166                                      int item,
 167                                      int flags ) const
 168 {
 169     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 170
 171     wxASSERT_MSG( combo->IsKindOf(CLASSINFO(wxOwnerDrawnComboBox)),
 172                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 173
 174     if ( IsCurrent((size_t)item) && !(flags & wxODCB_PAINTING_CONTROL) )
 175         flags |= wxODCB_PAINTING_SELECTED;
 176
 177     combo->OnDrawBackground(dc,rect,item,flags);
 178 }
 179
 180 void wxVListBoxComboPopup::OnDrawBackground(wxDC& dc, const wxRect& rect, size_t n) const
 181 {
 182     OnDrawBg(dc,rect,(int)n,0);
 183 }
 184
 185 // This is called from wxVListBoxComboPopup::OnDrawItem, with text colour and font prepared
 186 void wxVListBoxComboPopup::OnDrawItem( wxDC& dc, const wxRect& rect, int item, int flags ) const
 187 {
 188     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 189
 190     wxASSERT_MSG( combo->IsKindOf(CLASSINFO(wxOwnerDrawnComboBox)),
 191                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 192
 193     combo->OnDrawItem(dc,rect,item,flags);
 194 }
 195
 196 void wxVListBoxComboPopup::DismissWithEvent()
 197 {
 198     StopPartialCompletion();
 199
 200     int selection = wxVListBox::GetSelection();
 201
 202     Dismiss();
 203
 204     wxString valStr;
 205     if ( selection != wxNOT_FOUND )
 206         valStr = m_strings[selection];
 207     else
 208         valStr = wxEmptyString;
 209
 210     m_value = selection;
 211
 212     if ( valStr != m_combo->GetValue() )
 213         m_combo->SetValueWithEvent(valStr);
 214
 215     SendComboBoxEvent(selection);
 216 }
 217
 218 void wxVListBoxComboPopup::SendComboBoxEvent( int selection )
 219 {
 220     wxCommandEvent evt(wxEVT_COMMAND_COMBOBOX_SELECTED,m_combo->GetId());
 221
 222     evt.SetEventObject(m_combo);
 223
 224     evt.SetInt(selection);
 225
 226     // Set client data, if any
 227     if ( selection >= 0 && (int)m_clientDatas.GetCount() > selection )
 228     {
 229         void* clientData = m_clientDatas[selection];
 230         if ( m_clientDataItemsType == wxClientData_Object )
 231             evt.SetClientObject((wxClientData*)clientData);
 232         else
 233             evt.SetClientData(clientData);
 234     }
 235
 236     m_combo->GetEventHandler()->AddPendingEvent(evt);
 237 }
 238
 239 // returns true if key was consumed
 240 bool wxVListBoxComboPopup::HandleKey( int keycode, bool saturate, wxChar unicode )
 241 {
 242     int value = m_value;
 243     int itemCount = GetCount();
 244     int comboStyle = m_combo->GetWindowStyle();
 245
 246     // this is the character equivalent of the code
 247     wxChar keychar=0;
 248     if ((keycode >= WXK_SPACE) && (keycode <=255) && (keycode != WXK_DELETE) && wxIsprint(keycode))
 249     {
 250         keychar = (wxChar)keycode;
 251     }
 252     else if (unicode>0)
 253     {
 254         keychar = unicode;
 255     }
 256
 257     if ( keycode == WXK_DOWN || keycode == WXK_RIGHT )
 258     {
 259         value++;
 260         StopPartialCompletion();
 261     }
 262     else if ( keycode == WXK_UP || keycode == WXK_LEFT )
 263     {
 264         value--;
 265         StopPartialCompletion();
 266     }
 267     else if ( keycode == WXK_PAGEDOWN )
 268     {
 269         value+=10;
 270         StopPartialCompletion();
 271     }
 272     else if ( keycode == WXK_PAGEUP )
 273     {
 274         value-=10;
 275         StopPartialCompletion();
 276     }
 277     else if ( comboStyle & wxCB_READONLY )
 278     {
 279         // Try partial completion
 280
 281         // find the new partial completion string
 282 #if wxUSE_TIMER
 283         if (m_partialCompletionTimer.IsRunning())
 284             m_partialCompletionString+=wxString(keychar);
 285         else
 286 #endif // wxUSE_TIMER
 287             m_partialCompletionString=wxString(keychar);
 288
 289         // now search through the values to see if this is found
 290         int found = -1;
 291         unsigned int length=m_partialCompletionString.length();
 292         int i;
 293         for (i=0; i<itemCount; i++)
 294         {
 295             wxString item=GetString(i);
 296             if (( item.length() >= length) && (!  m_partialCompletionString.CmpNoCase(item.Left(length))))
 297             {
 298                 found=i;
 299                 break;
 300             }
 301         }
 302
 303         if (found<0)
 304         {
 305             StopPartialCompletion();
 306             ::wxBell();
 307             return true; // to stop the first value being set
 308         }
 309         else
 310         {
 311             value=i;
 312 #if wxUSE_TIMER
 313             m_partialCompletionTimer.Start(wxODCB_PARTIAL_COMPLETION_TIME, true);
 314 #endif // wxUSE_TIMER
 315         }
 316     }
 317     else
 318         return false;
 319
 320     if ( saturate )
 321     {
 322         if ( value >= itemCount )
 323             value = itemCount - 1;
 324         else if ( value < 0 )
 325             value = 0;
 326     }
 327     else
 328     {
 329         if ( value >= itemCount )
 330             value -= itemCount;
 331         else if ( value < 0 )
 332             value += itemCount;
 333     }
 334
 335     if ( value == m_value )
 336         // Even if value was same, don't skip the event
 337         // (good for consistency)
 338         return true;
 339
 340     m_value = value;
 341
 342     if ( value >= 0 )
 343         m_combo->SetValue(m_strings[value]);
 344
 345     SendComboBoxEvent(m_value);
 346
 347     return true;
 348 }
 349
 350 // stop partial completion
 351 void wxVListBoxComboPopup::StopPartialCompletion()
 352 {
 353     m_partialCompletionString = wxEmptyString;
 354 #if wxUSE_TIMER
 355     m_partialCompletionTimer.Stop();
 356 #endif // wxUSE_TIMER
 357 }
 358
 359 void wxVListBoxComboPopup::OnComboDoubleClick()
 360 {
 361     // Cycle on dclick (disable saturation to allow true cycling).
 362     if ( !::wxGetKeyState(WXK_SHIFT) )
 363         HandleKey(WXK_DOWN,false);
 364     else
 365         HandleKey(WXK_UP,false);
 366 }
 367
 368 void wxVListBoxComboPopup::OnComboKeyEvent( wxKeyEvent& event )
 369 {
 370     // Saturated key movement on
 371     if ( !HandleKey(event.GetKeyCode(),true,
 372 #if wxUSE_UNICODE
 373         event.GetUnicodeKey()
 374 #else
 375         0
 376 #endif
 377         ) )
 378         event.Skip();
 379 }
 380
 381 void wxVListBoxComboPopup::OnPopup()
 382 {
 383     // *must* set value after size is set (this is because of a vlbox bug)
 384     wxVListBox::SetSelection(m_value);
 385 }
 386
 387 void wxVListBoxComboPopup::OnMouseMove(wxMouseEvent& event)
 388 {
 389     event.Skip();
 390
 391     // Move selection to cursor if it is inside the popup
 392
 393     int y = event.GetPosition().y;
 394     int fromBottom = GetClientSize().y - y;
 395
 396     // Since in any case we need to find out if the last item is only
 397     // partially visible, we might just as well replicate the HitTest
 398     // loop here.
 399     const size_t lineMax = GetVisibleEnd();
 400     for ( size_t line = GetVisibleBegin(); line < lineMax; line++ )
 401     {
 402         y -= OnGetLineHeight(line);
 403         if ( y < 0 )
 404         {
 405             // Only change selection if item is fully visible
 406             if ( (y + fromBottom) >= 0 )
 407             {
 408                 wxVListBox::SetSelection((int)line);
 409                 return;
 410             }
 411         }
 412     }
 413 }
 414
 415 void wxVListBoxComboPopup::OnLeftClick(wxMouseEvent& WXUNUSED(event))
 416 {
 417     DismissWithEvent();
 418 }
 419
 420 void wxVListBoxComboPopup::OnKey(wxKeyEvent& event)
 421 {
 422     // Hide popup if certain key or key combination was pressed
 423     if ( m_combo->IsKeyPopupToggle(event) )
 424     {
 425         StopPartialCompletion();
 426         Dismiss();
 427     }
 428     else if ( event.AltDown() )
 429     {
 430         // On both wxGTK and wxMSW, pressing Alt down seems to
 431         // completely freeze things in popup (ie. arrow keys and
 432         // enter won't work).
 433         return;
 434     }
 435     // Select item if ENTER is pressed
 436     else if ( event.GetKeyCode() == WXK_RETURN || event.GetKeyCode() == WXK_NUMPAD_ENTER )
 437     {
 438         DismissWithEvent();
 439     }
 440     else
 441     {
 442         int comboStyle = m_combo->GetWindowStyle();
 443         int keycode = event.GetKeyCode();
 444         // Process partial completion key codes here, but not the arrow keys as the base class will do that for us
 445         if ((comboStyle & wxCB_READONLY) &&
 446             (keycode >= WXK_SPACE) && (keycode <=255) && (keycode != WXK_DELETE) && wxIsprint(keycode))
 447         {
 448             OnComboKeyEvent(event);
 449             SetSelection(m_value); // ensure the highlight bar moves
 450         }
 451         else
 452             event.Skip();
 453     }
 454 }
 455
 456 void wxVListBoxComboPopup::Insert( const wxString& item, int pos )
 457 {
 458     // Need to change selection?
 459     wxString strValue;
 460     if ( !(m_combo->GetWindowStyle() & wxCB_READONLY) &&
 461          m_combo->GetValue() == item )
 462     {
 463         m_value = pos;
 464     }
 465
 466     m_strings.Insert(item,pos);
 467     m_widths.Insert(-1,pos);
 468     m_widthsDirty = true;
 469
 470     if ( IsCreated() )
 471         wxVListBox::SetItemCount( wxVListBox::GetItemCount()+1 );
 472 }
 473
 474 int wxVListBoxComboPopup::Append(const wxString& item)
 475 {
 476     int pos = (int)m_strings.GetCount();
 477
 478     if ( m_combo->GetWindowStyle() & wxCB_SORT )
 479     {
 480         // Find position
 481         // TODO: Could be optimized with binary search
 482         wxArrayString strings = m_strings;
 483         unsigned int i;
 484
 485         for ( i=0; i<strings.GetCount(); i++ )
 486         {
 487             if ( item.Cmp(strings.Item(i)) < 0 )
 488             {
 489                 pos = (int)i;
 490                 break;
 491             }
 492         }
 493     }
 494
 495     Insert(item,pos);
 496
 497     return pos;
 498 }
 499
 500 void wxVListBoxComboPopup::Clear()
 501 {
 502     wxASSERT(m_combo);
 503
 504     m_strings.Empty();
 505     m_widths.Empty();
 506
 507     m_widestWidth = 0;
 508     m_widestItem = -1;
 509
 510     ClearClientDatas();
 511
 512     m_value = wxNOT_FOUND;
 513
 514     if ( IsCreated() )
 515         wxVListBox::SetItemCount(0);
 516 }
 517
 518 void wxVListBoxComboPopup::ClearClientDatas()
 519 {
 520     if ( m_clientDataItemsType == wxClientData_Object )
 521     {
 522         size_t i;
 523         for ( i=0; i<m_clientDatas.GetCount(); i++ )
 524             delete (wxClientData*) m_clientDatas[i];
 525     }
 526
 527     m_clientDatas.Empty();
 528 }
 529
 530 void wxVListBoxComboPopup::SetItemClientData( unsigned int n,
 531                                               void* clientData,
 532                                               wxClientDataType clientDataItemsType )
 533 {
 534     // It should be sufficient to update this variable only here
 535     m_clientDataItemsType = clientDataItemsType;
 536
 537     m_clientDatas.SetCount(n+1,NULL);
 538     m_clientDatas[n] = clientData;
 539
 540     ItemWidthChanged(n);
 541 }
 542
 543 void* wxVListBoxComboPopup::GetItemClientData(unsigned int n) const
 544 {
 545     if ( m_clientDatas.GetCount() > n )
 546         return m_clientDatas[n];
 547
 548     return NULL;
 549 }
 550
 551 void wxVListBoxComboPopup::Delete( unsigned int item )
 552 {
 553     // Remove client data, if set
 554     if ( m_clientDatas.GetCount() )
 555     {
 556         if ( m_clientDataItemsType == wxClientData_Object )
 557             delete (wxClientData*) m_clientDatas[item];
 558
 559         m_clientDatas.RemoveAt(item);
 560     }
 561
 562     m_strings.RemoveAt(item);
 563     m_widths.RemoveAt(item);
 564
 565     if ( (int)item == m_widestItem )
 566         m_findWidest = true;
 567
 568     int sel = GetSelection();
 569
 570     if ( IsCreated() )
 571         wxVListBox::SetItemCount( wxVListBox::GetItemCount()-1 );
 572
 573     // Fix selection
 574     if ( (int)item < sel )
 575         SetSelection(sel-1);
 576     else if ( (int)item == sel )
 577         SetSelection(wxNOT_FOUND);
 578 }
 579
 580 int wxVListBoxComboPopup::FindString(const wxString& s, bool bCase) const
 581 {
 582     return m_strings.Index(s, bCase);
 583 }
 584
 585 unsigned int wxVListBoxComboPopup::GetCount() const
 586 {
 587     return m_strings.GetCount();
 588 }
 589
 590 wxString wxVListBoxComboPopup::GetString( int item ) const
 591 {
 592     return m_strings[item];
 593 }
 594
 595 void wxVListBoxComboPopup::SetString( int item, const wxString& str )
 596 {
 597     m_strings[item] = str;
 598     ItemWidthChanged(item);
 599 }
 600
 601 wxString wxVListBoxComboPopup::GetStringValue() const
 602 {
 603     if ( m_value >= 0 )
 604         return m_strings[m_value];
 605     return wxEmptyString;
 606 }
 607
 608 void wxVListBoxComboPopup::SetSelection( int item )
 609 {
 610     wxCHECK_RET( item == wxNOT_FOUND || ((unsigned int)item < GetCount()),
 611                  wxT("invalid index in wxVListBoxComboPopup::SetSelection") );
 612
 613     m_value = item;
 614
 615     if ( IsCreated() )
 616         wxVListBox::SetSelection(item);
 617 }
 618
 619 int wxVListBoxComboPopup::GetSelection() const
 620 {
 621     return m_value;
 622 }
 623
 624 void wxVListBoxComboPopup::SetStringValue( const wxString& value )
 625 {
 626     int index = m_strings.Index(value);
 627
 628     m_value = index;
 629
 630     if ( index >= -1 && index < (int)wxVListBox::GetItemCount() )
 631         wxVListBox::SetSelection(index);
 632 }
 633
 634 void wxVListBoxComboPopup::CalcWidths()
 635 {
 636     bool doFindWidest = m_findWidest;
 637
 638     // Measure items with dirty width.
 639     if ( m_widthsDirty )
 640     {
 641         unsigned int i;
 642         unsigned int n = m_widths.GetCount();
 643         int dirtyHandled = 0;
 644         wxArrayInt& widths = m_widths;
 645
 646         // I think using wxDC::GetTextExtent is faster than
 647         // wxWindow::GetTextExtent (assuming same dc is used
 648         // for all calls, as we do here).
 649         wxClientDC dc(m_combo);
 650         dc.SetFont(m_useFont);
 651
 652         for ( i=0; i<n; i++ )
 653         {
 654             if ( widths[i] < 0 )
 655             {
 656                 wxCoord x = OnMeasureItemWidth(i);
 657
 658                 if ( x < 0 )
 659                 {
 660                     const wxString& text = m_strings[i];
 661
 662                     // To make sure performance won't suck in extreme scenarios,
 663                     // we'll estimate length after some arbitrary number of items
 664                     // have been checked precily.
 665                     if ( dirtyHandled < 1024 )
 666                     {
 667                         wxCoord y;
 668                         dc.GetTextExtent(text, &x, &y, 0, 0);
 669                         x += 4;
 670                     }
 671                     else
 672                     {
 673                         x = text.length() * (dc.GetCharWidth()+1);
 674                     }
 675                 }
 676
 677                 widths[i] = x;
 678
 679                 if ( x >= m_widestWidth )
 680                 {
 681                     m_widestWidth = x;
 682                     m_widestItem = (int)i;
 683                 }
 684                 else if ( (int)i == m_widestItem )
 685                 {
 686                     // Width of previously widest item has been decreased, so
 687                     // we'll have to check all to find current widest item.
 688                     doFindWidest = true;
 689                 }
 690
 691                 dirtyHandled++;
 692             }
 693         }
 694
 695         m_widthsDirty = false;
 696     }
 697
 698     if ( doFindWidest )
 699     {
 700         unsigned int i;
 701         unsigned int n = m_widths.GetCount();
 702
 703         int bestWidth = -1;
 704         int bestIndex = -1;
 705
 706         for ( i=0; i<n; i++ )
 707         {
 708             int w = m_widths[i];
 709             if ( w > bestWidth )
 710             {
 711                 bestIndex = (int)i;
 712                 bestWidth = w;
 713             }
 714         }
 715
 716         m_widestWidth = bestWidth;
 717         m_widestItem = bestIndex;
 718
 719         m_findWidest = false;
 720     }
 721 }
 722
 723 wxSize wxVListBoxComboPopup::GetAdjustedSize( int minWidth, int prefHeight, int maxHeight )
 724 {
 725     int height = 250;
 726
 727     if ( m_strings.GetCount() )
 728     {
 729         if ( prefHeight > 0 )
 730             height = prefHeight;
 731
 732         if ( height > maxHeight )
 733             height = maxHeight;
 734
 735         int totalHeight = GetTotalHeight(); // + 3;
 736         if ( height >= totalHeight )
 737         {
 738             height = totalHeight;
 739         }
 740         else
 741         {
 742             // Adjust height to a multiple of the height of the first item
 743             // NB: Calculations that take variable height into account
 744             //     are unnecessary.
 745             int fih = GetLineHeight(0);
 746             int shown = height/fih;
 747             height = shown * fih;
 748         }
 749     }
 750     else
 751         height = 50;
 752
 753     CalcWidths();
 754
 755     // Take scrollbar into account in width calculations
 756     int widestWidth = m_widestWidth + wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
 757     return wxSize(minWidth > widestWidth ? minWidth : widestWidth,
 758                   height+2);
 759 }
 760
 761 //void wxVListBoxComboPopup::Populate( int n, const wxString choices[] )
 762 void wxVListBoxComboPopup::Populate( const wxArrayString& choices )
 763 {
 764     int i;
 765
 766     int n = choices.GetCount();
 767
 768     for ( i=0; i<n; i++ )
 769     {
 770         const wxString& item = choices.Item(i);
 771         m_strings.Add(item);
 772     }
 773
 774     m_widths.SetCount(n,-1);
 775     m_widthsDirty = true;
 776
 777     if ( IsCreated() )
 778         wxVListBox::SetItemCount(n);
 779
 780     // Sort the initial choices
 781     if ( m_combo->GetWindowStyle() & wxCB_SORT )
 782         m_strings.Sort();
 783
 784     // Find initial selection
 785     wxString strValue = m_combo->GetValue();
 786     if ( strValue.length() )
 787         m_value = m_strings.Index(strValue);
 788 }
 789
 790 // ----------------------------------------------------------------------------
 791 // wxOwnerDrawnComboBox
 792 // ----------------------------------------------------------------------------
 793
 794
 795 BEGIN_EVENT_TABLE(wxOwnerDrawnComboBox, wxComboCtrl)
 796 END_EVENT_TABLE()
 797
 798
 799 IMPLEMENT_DYNAMIC_CLASS2(wxOwnerDrawnComboBox, wxComboCtrl, wxControlWithItems)
 800
 801 void wxOwnerDrawnComboBox::Init()
 802 {
 803 }
 804
 805 bool wxOwnerDrawnComboBox::Create(wxWindow *parent,
 806                                   wxWindowID id,
 807                                   const wxString& value,
 808                                   const wxPoint& pos,
 809                                   const wxSize& size,
 810                                   long style,
 811                                   const wxValidator& validator,
 812                                   const wxString& name)
 813 {
 814     return wxComboCtrl::Create(parent,id,value,pos,size,style,validator,name);
 815 }
 816
 817 wxOwnerDrawnComboBox::wxOwnerDrawnComboBox(wxWindow *parent,
 818                                            wxWindowID id,
 819                                            const wxString& value,
 820                                            const wxPoint& pos,
 821                                            const wxSize& size,
 822                                            const wxArrayString& choices,
 823                                            long style,
 824                                            const wxValidator& validator,
 825                                            const wxString& name)
 826     : wxComboCtrl()
 827 {
 828     Init();
 829
 830     Create(parent,id,value,pos,size,choices,style, validator, name);
 831 }
 832
 833 bool wxOwnerDrawnComboBox::Create(wxWindow *parent,
 834                                   wxWindowID id,
 835                                   const wxString& value,
 836                                   const wxPoint& pos,
 837                                   const wxSize& size,
 838                                   const wxArrayString& choices,
 839                                   long style,
 840                                   const wxValidator& validator,
 841                                   const wxString& name)
 842 {
 843     m_initChs = choices;
 844     //wxCArrayString chs(choices);
 845
 846     //return Create(parent, id, value, pos, size, chs.GetCount(),
 847     //              chs.GetStrings(), style, validator, name);
 848     return Create(parent, id, value, pos, size, 0,
 849                   NULL, style, validator, name);
 850 }
 851
 852 bool wxOwnerDrawnComboBox::Create(wxWindow *parent,
 853                                   wxWindowID id,
 854                                   const wxString& value,
 855                                   const wxPoint& pos,
 856                                   const wxSize& size,
 857                                   int n,
 858                                   const wxString choices[],
 859                                   long style,
 860                                   const wxValidator& validator,
 861                                   const wxString& name)
 862 {
 863
 864     if ( !Create(parent, id, value, pos, size, style,
 865                  validator, name) )
 866     {
 867         return false;
 868     }
 869
 870     int i;
 871     for ( i=0; i<n; i++ )
 872         m_initChs.Add(choices[i]);
 873
 874     return true;
 875 }
 876
 877 wxOwnerDrawnComboBox::~wxOwnerDrawnComboBox()
 878 {
 879     if ( m_popupInterface )
 880         GetVListBoxComboPopup()->ClearClientDatas();
 881 }
 882
 883 void wxOwnerDrawnComboBox::DoSetPopupControl(wxComboPopup* popup)
 884 {
 885     if ( !popup )
 886     {
 887         popup = new wxVListBoxComboPopup();
 888     }
 889
 890     wxComboCtrl::DoSetPopupControl(popup);
 891
 892     wxASSERT(popup);
 893
 894     // Add initial choices to the wxVListBox
 895     if ( !GetVListBoxComboPopup()->GetCount() )
 896     {
 897         GetVListBoxComboPopup()->Populate(m_initChs);
 898         m_initChs.Clear();
 899     }
 900 }
 901
 902 // ----------------------------------------------------------------------------
 903 // wxOwnerDrawnComboBox item manipulation methods
 904 // ----------------------------------------------------------------------------
 905
 906 void wxOwnerDrawnComboBox::Clear()
 907 {
 908     EnsurePopupControl();
 909
 910     GetVListBoxComboPopup()->Clear();
 911
 912     SetValue(wxEmptyString);
 913 }
 914
 915 void wxOwnerDrawnComboBox::Delete(unsigned int n)
 916 {
 917     wxCHECK_RET( IsValid(n), _T("invalid index in wxOwnerDrawnComboBox::Delete") );
 918
 919     if ( GetSelection() == (int) n )
 920         SetValue(wxEmptyString);
 921
 922     GetVListBoxComboPopup()->Delete(n);
 923 }
 924
 925 unsigned int wxOwnerDrawnComboBox::GetCount() const
 926 {
 927     if ( !m_popupInterface )
 928         return m_initChs.GetCount();
 929
 930     return GetVListBoxComboPopup()->GetCount();
 931 }
 932
 933 wxString wxOwnerDrawnComboBox::GetString(unsigned int n) const
 934 {
 935     wxCHECK_MSG( IsValid(n), wxEmptyString, _T("invalid index in wxOwnerDrawnComboBox::GetString") );
 936
 937     if ( !m_popupInterface )
 938         return m_initChs.Item(n);
 939
 940     return GetVListBoxComboPopup()->GetString(n);
 941 }
 942
 943 void wxOwnerDrawnComboBox::SetString(unsigned int n, const wxString& s)
 944 {
 945     EnsurePopupControl();
 946
 947     wxCHECK_RET( IsValid(n), _T("invalid index in wxOwnerDrawnComboBox::SetString") );
 948
 949     GetVListBoxComboPopup()->SetString(n,s);
 950 }
 951
 952 int wxOwnerDrawnComboBox::FindString(const wxString& s, bool bCase) const
 953 {
 954     if ( !m_popupInterface )
 955         return m_initChs.Index(s, bCase);
 956
 957     return GetVListBoxComboPopup()->FindString(s, bCase);
 958 }
 959
 960 void wxOwnerDrawnComboBox::Select(int n)
 961 {
 962     EnsurePopupControl();
 963
 964     wxCHECK_RET( (n == wxNOT_FOUND) || IsValid(n), _T("invalid index in wxOwnerDrawnComboBox::Select") );
 965
 966     GetVListBoxComboPopup()->SetSelection(n);
 967
 968     wxString str;
 969     if ( n >= 0 )
 970         str = GetVListBoxComboPopup()->GetString(n);
 971
 972     // Refresh text portion in control
 973     if ( m_text )
 974         m_text->SetValue( str );
 975     else
 976         m_valueString = str;
 977
 978     Refresh();
 979 }
 980
 981 int wxOwnerDrawnComboBox::GetSelection() const
 982 {
 983     if ( !m_popupInterface )
 984         return m_initChs.Index(m_valueString);
 985
 986     return GetVListBoxComboPopup()->GetSelection();
 987 }
 988
 989 int wxOwnerDrawnComboBox::DoAppend(const wxString& item)
 990 {
 991     EnsurePopupControl();
 992     wxASSERT(m_popupInterface);
 993
 994     return GetVListBoxComboPopup()->Append(item);
 995 }
 996
 997 int wxOwnerDrawnComboBox::DoInsert(const wxString& item, unsigned int pos)
 998 {
 999     EnsurePopupControl();
1000
1001     wxCHECK_MSG(!(GetWindowStyle() & wxCB_SORT), -1, wxT("can't insert into sorted list"));
1002     wxCHECK_MSG(IsValidInsert(pos), -1, wxT("invalid index"));
1003
1004     GetVListBoxComboPopup()->Insert(item,pos);
1005
1006     return pos;
1007 }
1008
1009 void wxOwnerDrawnComboBox::DoSetItemClientData(unsigned int n, void* clientData)
1010 {
1011     EnsurePopupControl();
1012
1013     GetVListBoxComboPopup()->SetItemClientData(n,clientData,m_clientDataItemsType);
1014 }
1015
1016 void* wxOwnerDrawnComboBox::DoGetItemClientData(unsigned int n) const
1017 {
1018     if ( !m_popupInterface )
1019         return NULL;
1020
1021     return GetVListBoxComboPopup()->GetItemClientData(n);
1022 }
1023
1024 void wxOwnerDrawnComboBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData)
1025 {
1026     DoSetItemClientData(n, (void*) clientData);
1027 }
1028
1029 wxClientData* wxOwnerDrawnComboBox::DoGetItemClientObject(unsigned int n) const
1030 {
1031     return (wxClientData*) DoGetItemClientData(n);
1032 }
1033
1034 // ----------------------------------------------------------------------------
1035 // wxOwnerDrawnComboBox item drawing and measuring default implementations
1036 // ----------------------------------------------------------------------------
1037
1038 void wxOwnerDrawnComboBox::OnDrawItem( wxDC& dc,
1039                                        const wxRect& rect,
1040                                        int item,
1041                                        int flags ) const
1042 {
1043     if ( flags & wxODCB_PAINTING_CONTROL )
1044     {
1045         dc.DrawText( GetValue(),
1046                      rect.x + GetTextIndent(),
1047                      (rect.height-dc.GetCharHeight())/2 + rect.y );
1048     }
1049     else
1050     {
1051         dc.DrawText( GetVListBoxComboPopup()->GetString(item), rect.x + 2, rect.y );
1052     }
1053 }
1054
1055 wxCoord wxOwnerDrawnComboBox::OnMeasureItem( size_t WXUNUSED(item) ) const
1056 {
1057     return -1;
1058 }
1059
1060 wxCoord wxOwnerDrawnComboBox::OnMeasureItemWidth( size_t WXUNUSED(item) ) const
1061 {
1062     return -1;
1063 }
1064
1065 void wxOwnerDrawnComboBox::OnDrawBackground(wxDC& dc,
1066                                             const wxRect& rect,
1067                                             int WXUNUSED(item),
1068                                             int flags) const
1069 {
1070     // We need only to explicitly draw background for items
1071     // that should have selected background. Also, call PrepareBackground
1072     // always when painting the control so that clipping is done properly.
1073
1074     if ( (flags & wxODCB_PAINTING_SELECTED) ||
1075          ((flags & wxODCB_PAINTING_CONTROL) && HasFlag(wxCB_READONLY)) )
1076     {
1077         int bgFlags = wxCONTROL_SELECTED;
1078
1079         if ( !(flags & wxODCB_PAINTING_CONTROL) )
1080             bgFlags |= wxCONTROL_ISSUBMENU;
1081
1082         PrepareBackground(dc, rect, bgFlags);
1083     }
1084 }
1085
1086 #endif // wxUSE_ODCOMBOBOX