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     #include "wx/textctrl.h"
  37 #endif
  38
  39 #include "wx/combo.h"
  40
  41 // ============================================================================
  42 // implementation
  43 // ============================================================================
  44
  45 // time in milliseconds before partial completion buffer drops
  46 #define wxODCB_PARTIAL_COMPLETION_TIME 1000
  47
  48 // ----------------------------------------------------------------------------
  49 // wxVListBoxComboPopup is a wxVListBox customized to act as a popup control
  50 //
  51 // ----------------------------------------------------------------------------
  52
  53
  54 BEGIN_EVENT_TABLE(wxVListBoxComboPopup, wxVListBox)
  55     EVT_MOTION(wxVListBoxComboPopup::OnMouseMove)
  56     EVT_KEY_DOWN(wxVListBoxComboPopup::OnKey)
  57     EVT_CHAR(wxVListBoxComboPopup::OnChar)
  58     EVT_LEFT_UP(wxVListBoxComboPopup::OnLeftClick)
  59 END_EVENT_TABLE()
  60
  61
  62 void wxVListBoxComboPopup::Init()
  63 {
  64     m_widestWidth = 0;
  65     m_widestItem = -1;
  66     m_widthsDirty = false;
  67     m_findWidest = false;
  68     m_itemHeight = 0;
  69     m_value = -1;
  70     m_itemHover = -1;
  71     m_clientDataItemsType = wxClientData_None;
  72     m_partialCompletionString = wxEmptyString;
  73 }
  74
  75 bool wxVListBoxComboPopup::Create(wxWindow* parent)
  76 {
  77     if ( !wxVListBox::Create(parent,
  78                              wxID_ANY,
  79                              wxDefaultPosition,
  80                              wxDefaultSize,
  81                              wxBORDER_SIMPLE | wxLB_INT_HEIGHT | wxWANTS_CHARS) )
  82         return false;
  83
  84     m_useFont = m_combo->GetFont();
  85
  86     wxVListBox::SetItemCount(m_strings.GetCount());
  87
  88     // TODO: Move this to SetFont
  89     m_itemHeight = GetCharHeight() + 0;
  90
  91     return true;
  92 }
  93
  94 wxVListBoxComboPopup::~wxVListBoxComboPopup()
  95 {
  96     Clear();
  97 }
  98
  99 void wxVListBoxComboPopup::SetFocus()
 100 {
 101     // Suppress SetFocus() warning by simply not calling it. This combo popup
 102     // has already been designed with the assumption that SetFocus() may not
 103     // do anything useful, so it really doesn't need to be called.
 104 #ifdef __WXMSW__
 105     //
 106 #else
 107     wxVListBox::SetFocus();
 108 #endif
 109 }
 110
 111 bool wxVListBoxComboPopup::LazyCreate()
 112 {
 113     // NB: There is a bug with wxVListBox that can be avoided by creating
 114     //     it later (bug causes empty space to be shown if initial selection
 115     //     is at the end of a list longer than the control can show at once).
 116     return true;
 117 }
 118
 119 // paint the control itself
 120 void wxVListBoxComboPopup::PaintComboControl( wxDC& dc, const wxRect& rect )
 121 {
 122     if ( !(m_combo->GetWindowStyle() & wxODCB_STD_CONTROL_PAINT) )
 123     {
 124         int flags = wxODCB_PAINTING_CONTROL;
 125
 126         if ( m_combo->ShouldDrawFocus() )
 127             flags |= wxODCB_PAINTING_SELECTED;
 128
 129         OnDrawBg(dc, rect, m_value, flags);
 130
 131         if ( m_value >= 0 )
 132         {
 133             OnDrawItem(dc,rect,m_value,flags);
 134             return;
 135         }
 136     }
 137
 138     wxComboPopup::PaintComboControl(dc,rect);
 139 }
 140
 141 void wxVListBoxComboPopup::OnDrawItem(wxDC& dc, const wxRect& rect, size_t n) const
 142 {
 143     // TODO: Maybe this code could be moved to wxVListBox::OnPaint?
 144     dc.SetFont(m_useFont);
 145
 146     int flags = 0;
 147
 148     // Set correct text colour for selected items
 149     if ( wxVListBox::GetSelection() == (int) n )
 150     {
 151         dc.SetTextForeground( wxSystemSettings::GetColour(wxSYS_COLOUR_HIGHLIGHTTEXT) );
 152         flags |= wxODCB_PAINTING_SELECTED;
 153     }
 154     else
 155     {
 156         dc.SetTextForeground( wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOWTEXT) );
 157     }
 158
 159     OnDrawItem(dc,rect,(int)n,flags);
 160 }
 161
 162 wxCoord wxVListBoxComboPopup::OnMeasureItem(size_t n) const
 163 {
 164     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 165
 166     wxASSERT_MSG( wxDynamicCast(combo, wxOwnerDrawnComboBox),
 167                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 168
 169     wxCoord h = combo->OnMeasureItem(n);
 170     if ( h < 0 )
 171         h = m_itemHeight;
 172     return h;
 173 }
 174
 175 wxCoord wxVListBoxComboPopup::OnMeasureItemWidth(size_t n) const
 176 {
 177     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 178
 179     wxASSERT_MSG( wxDynamicCast(combo, wxOwnerDrawnComboBox),
 180                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 181
 182     return combo->OnMeasureItemWidth(n);
 183 }
 184
 185 void wxVListBoxComboPopup::OnDrawBg( wxDC& dc,
 186                                      const wxRect& rect,
 187                                      int item,
 188                                      int flags ) const
 189 {
 190     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 191
 192     wxASSERT_MSG( wxDynamicCast(combo, wxOwnerDrawnComboBox),
 193                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 194
 195     if ( IsCurrent((size_t)item) && !(flags & wxODCB_PAINTING_CONTROL) )
 196         flags |= wxODCB_PAINTING_SELECTED;
 197
 198     combo->OnDrawBackground(dc,rect,item,flags);
 199 }
 200
 201 void wxVListBoxComboPopup::OnDrawBackground(wxDC& dc, const wxRect& rect, size_t n) const
 202 {
 203     OnDrawBg(dc,rect,(int)n,0);
 204 }
 205
 206 // This is called from wxVListBoxComboPopup::OnDrawItem, with text colour and font prepared
 207 void wxVListBoxComboPopup::OnDrawItem( wxDC& dc, const wxRect& rect, int item, int flags ) const
 208 {
 209     wxOwnerDrawnComboBox* combo = (wxOwnerDrawnComboBox*) m_combo;
 210
 211     wxASSERT_MSG( wxDynamicCast(combo, wxOwnerDrawnComboBox),
 212                   wxT("you must subclass wxVListBoxComboPopup for drawing and measuring methods") );
 213
 214     combo->OnDrawItem(dc,rect,item,flags);
 215 }
 216
 217 void wxVListBoxComboPopup::DismissWithEvent()
 218 {
 219     StopPartialCompletion();
 220
 221     int selection = wxVListBox::GetSelection();
 222
 223     Dismiss();
 224
 225     if ( selection != wxNOT_FOUND )
 226         m_stringValue = m_strings[selection];
 227     else
 228         m_stringValue = wxEmptyString;
 229
 230     if ( m_stringValue != m_combo->GetValue() )
 231         m_combo->SetValueByUser(m_stringValue);
 232
 233     m_value = selection;
 234
 235     SendComboBoxEvent(selection);
 236 }
 237
 238 void wxVListBoxComboPopup::SendComboBoxEvent( int selection )
 239 {
 240     wxCommandEvent evt(wxEVT_COMMAND_COMBOBOX_SELECTED,m_combo->GetId());
 241
 242     evt.SetEventObject(m_combo);
 243
 244     evt.SetInt(selection);
 245
 246     // Set client data, if any
 247     if ( selection >= 0 && (int)m_clientDatas.GetCount() > selection )
 248     {
 249         void* clientData = m_clientDatas[selection];
 250         if ( m_clientDataItemsType == wxClientData_Object )
 251             evt.SetClientObject((wxClientData*)clientData);
 252         else
 253             evt.SetClientData(clientData);
 254     }
 255
 256     m_combo->GetEventHandler()->AddPendingEvent(evt);
 257 }
 258
 259 // returns true if key was consumed
 260 bool wxVListBoxComboPopup::HandleKey( int keycode, bool saturate, wxChar keychar )
 261 {
 262     const int itemCount = GetCount();
 263
 264     // keys do nothing in the empty control and returning immediately avoids
 265     // using invalid indices below
 266     if ( !itemCount )
 267         return false;
 268
 269     int value = m_value;
 270     int comboStyle = m_combo->GetWindowStyle();
 271
 272     if ( keychar > 0 )
 273     {
 274         // we have character equivalent of the keycode; filter out these that
 275         // are not printable characters
 276         if ( !wxIsprint(keychar) )
 277             keychar = 0;
 278     }
 279
 280     const bool readOnly = (comboStyle & wxCB_READONLY) != 0;
 281
 282     if ( keycode == WXK_DOWN || keycode == WXK_NUMPAD_DOWN || ( keycode == WXK_RIGHT && readOnly ) )
 283     {
 284         value++;
 285         StopPartialCompletion();
 286     }
 287     else if ( keycode == WXK_UP || keycode == WXK_NUMPAD_UP || ( keycode == WXK_LEFT && readOnly ) )
 288     {
 289         value--;
 290         StopPartialCompletion();
 291     }
 292     else if ( keycode == WXK_PAGEDOWN || keycode == WXK_NUMPAD_PAGEDOWN )
 293     {
 294         value+=10;
 295         StopPartialCompletion();
 296     }
 297     else if ( keycode == WXK_PAGEUP || keycode == WXK_NUMPAD_PAGEUP )
 298     {
 299         value-=10;
 300         StopPartialCompletion();
 301     }
 302     else if ( ( keycode == WXK_HOME || keycode == WXK_NUMPAD_HOME ) && readOnly )
 303     {
 304         value=0;
 305         StopPartialCompletion();
 306     }
 307     else if ( ( keycode == WXK_END || keycode == WXK_NUMPAD_END ) && readOnly )
 308     {
 309         value=itemCount-1;
 310         StopPartialCompletion();
 311     }
 312     else if ( keychar && readOnly )
 313     {
 314         // Try partial completion
 315
 316         // find the new partial completion string
 317 #if wxUSE_TIMER
 318         if (m_partialCompletionTimer.IsRunning())
 319             m_partialCompletionString+=wxString(keychar);
 320         else
 321 #endif // wxUSE_TIMER
 322             m_partialCompletionString=wxString(keychar);
 323
 324         // now search through the values to see if this is found
 325         int found = -1;
 326         unsigned int length=m_partialCompletionString.length();
 327         int i;
 328         for (i=0; i<itemCount; i++)
 329         {
 330             wxString item=GetString(i);
 331             if (( item.length() >= length) && (!  m_partialCompletionString.CmpNoCase(item.Left(length))))
 332             {
 333                 found=i;
 334                 break;
 335             }
 336         }
 337
 338         if (found<0)
 339         {
 340             StopPartialCompletion();
 341             ::wxBell();
 342             return true; // to stop the first value being set
 343         }
 344         else
 345         {
 346             value=i;
 347 #if wxUSE_TIMER
 348             m_partialCompletionTimer.Start(wxODCB_PARTIAL_COMPLETION_TIME, true);
 349 #endif // wxUSE_TIMER
 350         }
 351     }
 352     else
 353         return false;
 354
 355     if ( saturate )
 356     {
 357         if ( value >= itemCount )
 358             value = itemCount - 1;
 359         else if ( value < 0 )
 360             value = 0;
 361     }
 362     else
 363     {
 364         if ( value >= itemCount )
 365             value -= itemCount;
 366         else if ( value < 0 )
 367             value += itemCount;
 368     }
 369
 370     if ( value == m_value )
 371         // Even if value was same, don't skip the event
 372         // (good for consistency)
 373         return true;
 374
 375     if ( value >= 0 )
 376         m_combo->ChangeValue(m_strings[value]);
 377
 378     // The m_combo->SetValue() call above sets m_value to the index of this
 379     // string. But if there are more identical string, the index is of the
 380     // first occurrence, which may be wrong, so set the index explicitly here,
 381     // _after_ the SetValue() call.
 382     m_value = value;
 383
 384     SendComboBoxEvent(m_value);
 385
 386     return true;
 387 }
 388
 389 // stop partial completion
 390 void wxVListBoxComboPopup::StopPartialCompletion()
 391 {
 392     m_partialCompletionString = wxEmptyString;
 393 #if wxUSE_TIMER
 394     m_partialCompletionTimer.Stop();
 395 #endif // wxUSE_TIMER
 396 }
 397
 398 void wxVListBoxComboPopup::OnComboDoubleClick()
 399 {
 400     // Cycle on dclick (disable saturation to allow true cycling).
 401     if ( !::wxGetKeyState(WXK_SHIFT) )
 402         HandleKey(WXK_DOWN,false);
 403     else
 404         HandleKey(WXK_UP,false);
 405 }
 406
 407 void wxVListBoxComboPopup::OnComboKeyEvent( wxKeyEvent& event )
 408 {
 409     // Saturated key movement on
 410     if ( !HandleKey(event.GetKeyCode(), true) )
 411         event.Skip();
 412 }
 413
 414 void wxVListBoxComboPopup::OnComboCharEvent( wxKeyEvent& event )
 415 {
 416     // unlike in OnComboKeyEvent, wxEVT_CHAR contains meaningful
 417     // printable character information, so pass it
 418 #if wxUSE_UNICODE
 419     const wxChar charcode = event.GetUnicodeKey();
 420 #else
 421     const wxChar charcode = (wxChar)event.GetKeyCode();
 422 #endif
 423
 424     if ( !HandleKey(event.GetKeyCode(), true, charcode) )
 425         event.Skip();
 426 }
 427
 428 void wxVListBoxComboPopup::OnPopup()
 429 {
 430     // *must* set value after size is set (this is because of a vlbox bug)
 431     wxVListBox::SetSelection(m_value);
 432 }
 433
 434 void wxVListBoxComboPopup::OnMouseMove(wxMouseEvent& event)
 435 {
 436     event.Skip();
 437
 438     // Move selection to cursor if it is inside the popup
 439
 440     int y = event.GetPosition().y;
 441     int fromBottom = GetClientSize().y - y;
 442
 443     // Since in any case we need to find out if the last item is only
 444     // partially visible, we might just as well replicate the HitTest
 445     // loop here.
 446     const size_t lineMax = GetVisibleEnd();
 447     for ( size_t line = GetVisibleBegin(); line < lineMax; line++ )
 448     {
 449         y -= OnGetRowHeight(line);
 450         if ( y < 0 )
 451         {
 452             // Only change selection if item is fully visible
 453             if ( (y + fromBottom) >= 0 )
 454             {
 455                 wxVListBox::SetSelection((int)line);
 456                 return;
 457             }
 458         }
 459     }
 460 }
 461
 462 void wxVListBoxComboPopup::OnLeftClick(wxMouseEvent& WXUNUSED(event))
 463 {
 464     DismissWithEvent();
 465 }
 466
 467 void wxVListBoxComboPopup::OnKey(wxKeyEvent& event)
 468 {
 469     // Hide popup if certain key or key combination was pressed
 470     if ( m_combo->IsKeyPopupToggle(event) )
 471     {
 472         StopPartialCompletion();
 473         Dismiss();
 474     }
 475     else if ( event.AltDown() )
 476     {
 477         // On both wxGTK and wxMSW, pressing Alt down seems to
 478         // completely freeze things in popup (ie. arrow keys and
 479         // enter won't work).
 480         return;
 481     }
 482     // Select item if ENTER is pressed
 483     else if ( event.GetKeyCode() == WXK_RETURN || event.GetKeyCode() == WXK_NUMPAD_ENTER )
 484     {
 485         DismissWithEvent();
 486     }
 487     else
 488     {
 489         // completion is handled in OnChar() below
 490         event.Skip();
 491     }
 492 }
 493
 494 void wxVListBoxComboPopup::OnChar(wxKeyEvent& event)
 495 {
 496     if ( m_combo->GetWindowStyle() & wxCB_READONLY )
 497     {
 498         // Process partial completion key codes here, but not the arrow keys as
 499         // the base class will do that for us
 500 #if wxUSE_UNICODE
 501         const wxChar charcode = event.GetUnicodeKey();
 502 #else
 503         const wxChar charcode = (wxChar)event.GetKeyCode();
 504 #endif
 505         if ( wxIsprint(charcode) )
 506         {
 507             OnComboCharEvent(event);
 508             SetSelection(m_value); // ensure the highlight bar moves
 509             return; // don't skip the event
 510         }
 511     }
 512
 513     event.Skip();
 514 }
 515
 516 void wxVListBoxComboPopup::Insert( const wxString& item, int pos )
 517 {
 518     // Need to change selection?
 519     wxString strValue;
 520     if ( !(m_combo->GetWindowStyle() & wxCB_READONLY) &&
 521          m_combo->GetValue() == item )
 522     {
 523         m_value = pos;
 524     }
 525
 526     m_strings.Insert(item,pos);
 527     if ( (int)m_clientDatas.size() >= pos )
 528         m_clientDatas.Insert(NULL, pos);
 529
 530     m_widths.Insert(-1,pos);
 531     m_widthsDirty = true;
 532
 533     if ( IsCreated() )
 534         wxVListBox::SetItemCount( wxVListBox::GetItemCount()+1 );
 535 }
 536
 537 int wxVListBoxComboPopup::Append(const wxString& item)
 538 {
 539     int pos = (int)m_strings.GetCount();
 540
 541     if ( m_combo->GetWindowStyle() & wxCB_SORT )
 542     {
 543         // Find position
 544         // TODO: Could be optimized with binary search
 545         wxArrayString strings = m_strings;
 546         unsigned int i;
 547
 548         for ( i=0; i<strings.GetCount(); i++ )
 549         {
 550             if ( item.CmpNoCase(strings.Item(i)) <= 0 )
 551             {
 552                 pos = (int)i;
 553                 break;
 554             }
 555         }
 556     }
 557
 558     Insert(item,pos);
 559
 560     return pos;
 561 }
 562
 563 void wxVListBoxComboPopup::Clear()
 564 {
 565     wxASSERT(m_combo);
 566
 567     m_strings.Empty();
 568     m_widths.Empty();
 569
 570     m_widestWidth = 0;
 571     m_widestItem = -1;
 572
 573     ClearClientDatas();
 574
 575     m_value = wxNOT_FOUND;
 576
 577     if ( IsCreated() )
 578         wxVListBox::SetItemCount(0);
 579 }
 580
 581 void wxVListBoxComboPopup::ClearClientDatas()
 582 {
 583     if ( m_clientDataItemsType == wxClientData_Object )
 584     {
 585         size_t i;
 586         for ( i=0; i<m_clientDatas.GetCount(); i++ )
 587             delete (wxClientData*) m_clientDatas[i];
 588     }
 589
 590     m_clientDatas.Empty();
 591 }
 592
 593 void wxVListBoxComboPopup::SetItemClientData( unsigned int n,
 594                                               void* clientData,
 595                                               wxClientDataType clientDataItemsType )
 596 {
 597     // It should be sufficient to update this variable only here
 598     m_clientDataItemsType = clientDataItemsType;
 599
 600     m_clientDatas[n] = clientData;
 601
 602     ItemWidthChanged(n);
 603 }
 604
 605 void* wxVListBoxComboPopup::GetItemClientData(unsigned int n) const
 606 {
 607     if ( m_clientDatas.GetCount() > n )
 608         return m_clientDatas[n];
 609
 610     return NULL;
 611 }
 612
 613 void wxVListBoxComboPopup::Delete( unsigned int item )
 614 {
 615     // Remove client data, if set
 616     if ( m_clientDatas.GetCount() )
 617     {
 618         if ( m_clientDataItemsType == wxClientData_Object )
 619             delete (wxClientData*) m_clientDatas[item];
 620
 621         m_clientDatas.RemoveAt(item);
 622     }
 623
 624     m_strings.RemoveAt(item);
 625     m_widths.RemoveAt(item);
 626
 627     if ( (int)item == m_widestItem )
 628         m_findWidest = true;
 629
 630     int sel = GetSelection();
 631
 632     if ( IsCreated() )
 633         wxVListBox::SetItemCount( wxVListBox::GetItemCount()-1 );
 634
 635     // Fix selection
 636     if ( (int)item < sel )
 637         SetSelection(sel-1);
 638     else if ( (int)item == sel )
 639         SetSelection(wxNOT_FOUND);
 640 }
 641
 642 int wxVListBoxComboPopup::FindString(const wxString& s, bool bCase) const
 643 {
 644     return m_strings.Index(s, bCase);
 645 }
 646
 647 bool wxVListBoxComboPopup::FindItem(const wxString& item, wxString* trueItem)
 648 {
 649     int idx = m_strings.Index(item, false);
 650     if ( idx == wxNOT_FOUND )
 651         return false;
 652     if ( trueItem != NULL )
 653         *trueItem = m_strings[idx];
 654     return true;
 655 }
 656
 657 unsigned int wxVListBoxComboPopup::GetCount() const
 658 {
 659     return m_strings.GetCount();
 660 }
 661
 662 wxString wxVListBoxComboPopup::GetString( int item ) const
 663 {
 664     return m_strings[item];
 665 }
 666
 667 void wxVListBoxComboPopup::SetString( int item, const wxString& str )
 668 {
 669     m_strings[item] = str;
 670     ItemWidthChanged(item);
 671 }
 672
 673 wxString wxVListBoxComboPopup::GetStringValue() const
 674 {
 675     return m_stringValue;
 676 }
 677
 678 void wxVListBoxComboPopup::SetSelection( int item )
 679 {
 680     wxCHECK_RET( item == wxNOT_FOUND || ((unsigned int)item < GetCount()),
 681                  wxT("invalid index in wxVListBoxComboPopup::SetSelection") );
 682
 683     m_value = item;
 684
 685     if ( item >= 0 )
 686         m_stringValue = m_strings[item];
 687     else
 688         m_stringValue = wxEmptyString;
 689
 690     if ( IsCreated() )
 691         wxVListBox::SetSelection(item);
 692 }
 693
 694 int wxVListBoxComboPopup::GetSelection() const
 695 {
 696     return m_value;
 697 }
 698
 699 void wxVListBoxComboPopup::SetStringValue( const wxString& value )
 700 {
 701     int index = m_strings.Index(value);
 702
 703     m_stringValue = value;
 704
 705     if ( index >= 0 && index < (int)wxVListBox::GetItemCount() )
 706     {
 707         wxVListBox::SetSelection(index);
 708         m_value = index;
 709     }
 710 }
 711
 712 void wxVListBoxComboPopup::CalcWidths()
 713 {
 714     bool doFindWidest = m_findWidest;
 715
 716     // Measure items with dirty width.
 717     if ( m_widthsDirty )
 718     {
 719         unsigned int i;
 720         unsigned int n = m_widths.GetCount();
 721         int dirtyHandled = 0;
 722         wxArrayInt& widths = m_widths;
 723
 724         // I think using wxDC::GetTextExtent is faster than
 725         // wxWindow::GetTextExtent (assuming same dc is used
 726         // for all calls, as we do here).
 727         wxClientDC dc(m_combo);
 728         dc.SetFont(m_useFont);
 729
 730         for ( i=0; i<n; i++ )
 731         {
 732             if ( widths[i] < 0 )
 733             {
 734                 wxCoord x = OnMeasureItemWidth(i);
 735
 736                 if ( x < 0 )
 737                 {
 738                     const wxString& text = m_strings[i];
 739
 740                     // To make sure performance won't suck in extreme scenarios,
 741                     // we'll estimate length after some arbitrary number of items
 742                     // have been checked precily.
 743                     if ( dirtyHandled < 1024 )
 744                     {
 745                         wxCoord y;
 746                         dc.GetTextExtent(text, &x, &y, 0, 0);
 747                         x += 4;
 748                     }
 749                     else
 750                     {
 751                         x = text.length() * (dc.GetCharWidth()+1);
 752                     }
 753                 }
 754
 755                 widths[i] = x;
 756
 757                 if ( x >= m_widestWidth )
 758                 {
 759                     m_widestWidth = x;
 760                     m_widestItem = (int)i;
 761                 }
 762                 else if ( (int)i == m_widestItem )
 763                 {
 764                     // Width of previously widest item has been decreased, so
 765                     // we'll have to check all to find current widest item.
 766                     doFindWidest = true;
 767                 }
 768
 769                 dirtyHandled++;
 770             }
 771         }
 772
 773         m_widthsDirty = false;
 774     }
 775
 776     if ( doFindWidest )
 777     {
 778         unsigned int i;
 779         unsigned int n = m_widths.GetCount();
 780
 781         int bestWidth = -1;
 782         int bestIndex = -1;
 783
 784         for ( i=0; i<n; i++ )
 785         {
 786             int w = m_widths[i];
 787             if ( w > bestWidth )
 788             {
 789                 bestIndex = (int)i;
 790                 bestWidth = w;
 791             }
 792         }
 793
 794         m_widestWidth = bestWidth;
 795         m_widestItem = bestIndex;
 796
 797         m_findWidest = false;
 798     }
 799 }
 800
 801 wxSize wxVListBoxComboPopup::GetAdjustedSize( int minWidth, int prefHeight, int maxHeight )
 802 {
 803     int height = 250;
 804
 805     maxHeight -= 2;  // Must take borders into account
 806
 807     if ( m_strings.GetCount() )
 808     {
 809         if ( prefHeight > 0 )
 810             height = prefHeight;
 811
 812         if ( height > maxHeight )
 813             height = maxHeight;
 814
 815         int totalHeight = GetTotalHeight(); // + 3;
 816
 817         // Take borders into account on Mac or scrollbars always appear
 818 #if defined(__WXMAC__)
 819         totalHeight += 2;
 820 #endif
 821         if ( height >= totalHeight )
 822         {
 823             height = totalHeight;
 824         }
 825         else
 826         {
 827             // Adjust height to a multiple of the height of the first item
 828             // NB: Calculations that take variable height into account
 829             //     are unnecessary.
 830             int fih = GetLineHeight(0);
 831             height -= height % fih;
 832         }
 833     }
 834     else
 835         height = 50;
 836
 837     CalcWidths();
 838
 839     // Take scrollbar into account in width calculations
 840     int widestWidth = m_widestWidth + wxSystemSettings::GetMetric(wxSYS_VSCROLL_X);
 841     return wxSize(minWidth > widestWidth ? minWidth : widestWidth,
 842                   height+2);
 843 }
 844
 845 //void wxVListBoxComboPopup::Populate( int n, const wxString choices[] )
 846 void wxVListBoxComboPopup::Populate( const wxArrayString& choices )
 847 {
 848     int i;
 849
 850     int n = choices.GetCount();
 851
 852     for ( i=0; i<n; i++ )
 853     {
 854         const wxString& item = choices.Item(i);
 855         m_strings.Add(item);
 856     }
 857
 858     m_widths.SetCount(n,-1);
 859     m_widthsDirty = true;
 860
 861     if ( IsCreated() )
 862         wxVListBox::SetItemCount(n);
 863
 864     // Sort the initial choices
 865     if ( m_combo->GetWindowStyle() & wxCB_SORT )
 866         m_strings.Sort();
 867
 868     // Find initial selection
 869     wxString strValue = m_combo->GetValue();
 870     if ( !strValue.empty() )
 871         m_value = m_strings.Index(strValue);
 872 }
 873
 874 // ----------------------------------------------------------------------------
 875 // wxOwnerDrawnComboBox
 876 // ----------------------------------------------------------------------------
 877
 878
 879 BEGIN_EVENT_TABLE(wxOwnerDrawnComboBox, wxComboCtrl)
 880 END_EVENT_TABLE()
 881
 882 void wxOwnerDrawnComboBox::Init()
 883 {
 884 }
 885
 886 bool wxOwnerDrawnComboBox::Create(wxWindow *parent,
 887                                   wxWindowID id,
 888                                   const wxString& value,
 889                                   const wxPoint& pos,
 890                                   const wxSize& size,
 891                                   long style,
 892                                   const wxValidator& validator,
 893                                   const wxString& name)
 894 {
 895     return wxComboCtrl::Create(parent,id,value,pos,size,style,validator,name);
 896 }
 897
 898 wxOwnerDrawnComboBox::wxOwnerDrawnComboBox(wxWindow *parent,
 899                                            wxWindowID id,
 900                                            const wxString& value,
 901                                            const wxPoint& pos,
 902                                            const wxSize& size,
 903                                            const wxArrayString& choices,
 904                                            long style,
 905                                            const wxValidator& validator,
 906                                            const wxString& name)
 907 {
 908     Init();
 909
 910     Create(parent,id,value,pos,size,choices,style, validator, name);
 911 }
 912
 913 bool wxOwnerDrawnComboBox::Create(wxWindow *parent,
 914                                   wxWindowID id,
 915                                   const wxString& value,
 916                                   const wxPoint& pos,
 917                                   const wxSize& size,
 918                                   const wxArrayString& choices,
 919                                   long style,
 920                                   const wxValidator& validator,
 921                                   const wxString& name)
 922 {
 923     m_initChs = choices;
 924     //wxCArrayString chs(choices);
 925
 926     //return Create(parent, id, value, pos, size, chs.GetCount(),
 927     //              chs.GetStrings(), style, validator, name);
 928     return Create(parent, id, value, pos, size, 0,
 929                   NULL, style, validator, name);
 930 }
 931
 932 bool wxOwnerDrawnComboBox::Create(wxWindow *parent,
 933                                   wxWindowID id,
 934                                   const wxString& value,
 935                                   const wxPoint& pos,
 936                                   const wxSize& size,
 937                                   int n,
 938                                   const wxString choices[],
 939                                   long style,
 940                                   const wxValidator& validator,
 941                                   const wxString& name)
 942 {
 943
 944     if ( !Create(parent, id, value, pos, size, style,
 945                  validator, name) )
 946     {
 947         return false;
 948     }
 949
 950     int i;
 951     for ( i=0; i<n; i++ )
 952         m_initChs.Add(choices[i]);
 953
 954     return true;
 955 }
 956
 957 wxOwnerDrawnComboBox::~wxOwnerDrawnComboBox()
 958 {
 959     if ( m_popupInterface )
 960         GetVListBoxComboPopup()->ClearClientDatas();
 961 }
 962
 963 void wxOwnerDrawnComboBox::DoSetPopupControl(wxComboPopup* popup)
 964 {
 965     if ( !popup )
 966     {
 967         popup = new wxVListBoxComboPopup();
 968     }
 969
 970     wxComboCtrl::DoSetPopupControl(popup);
 971
 972     wxASSERT(popup);
 973
 974     // Add initial choices to the wxVListBox
 975     if ( !GetVListBoxComboPopup()->GetCount() )
 976     {
 977         GetVListBoxComboPopup()->Populate(m_initChs);
 978         m_initChs.Clear();
 979     }
 980 }
 981
 982 // ----------------------------------------------------------------------------
 983 // wxOwnerDrawnComboBox item manipulation methods
 984 // ----------------------------------------------------------------------------
 985
 986 void wxOwnerDrawnComboBox::DoClear()
 987 {
 988     EnsurePopupControl();
 989
 990     GetVListBoxComboPopup()->Clear();
 991
 992     // NB: This really needs to be SetValue() instead of ChangeValue(),
 993     //     as wxTextEntry API expects an event to be sent.
 994     SetValue(wxEmptyString);
 995 }
 996
 997 void wxOwnerDrawnComboBox::Clear()
 998 {
 999     DoClear();
1000 }
1001
1002 void wxOwnerDrawnComboBox::DoDeleteOneItem(unsigned int n)
1003 {
1004     wxCHECK_RET( IsValid(n), wxT("invalid index in wxOwnerDrawnComboBox::Delete") );
1005
1006     if ( GetSelection() == (int) n )
1007         ChangeValue(wxEmptyString);
1008
1009     GetVListBoxComboPopup()->Delete(n);
1010 }
1011
1012 unsigned int wxOwnerDrawnComboBox::GetCount() const
1013 {
1014     if ( !m_popupInterface )
1015         return m_initChs.GetCount();
1016
1017     return GetVListBoxComboPopup()->GetCount();
1018 }
1019
1020 wxString wxOwnerDrawnComboBox::GetString(unsigned int n) const
1021 {
1022     wxCHECK_MSG( IsValid(n), wxEmptyString, wxT("invalid index in wxOwnerDrawnComboBox::GetString") );
1023
1024     if ( !m_popupInterface )
1025         return m_initChs.Item(n);
1026
1027     return GetVListBoxComboPopup()->GetString(n);
1028 }
1029
1030 void wxOwnerDrawnComboBox::SetString(unsigned int n, const wxString& s)
1031 {
1032     EnsurePopupControl();
1033
1034     wxCHECK_RET( IsValid(n), wxT("invalid index in wxOwnerDrawnComboBox::SetString") );
1035
1036     GetVListBoxComboPopup()->SetString(n,s);
1037 }
1038
1039 int wxOwnerDrawnComboBox::FindString(const wxString& s, bool bCase) const
1040 {
1041     if ( !m_popupInterface )
1042         return m_initChs.Index(s, bCase);
1043
1044     return GetVListBoxComboPopup()->FindString(s, bCase);
1045 }
1046
1047 void wxOwnerDrawnComboBox::Select(int n)
1048 {
1049     EnsurePopupControl();
1050
1051     wxCHECK_RET( (n == wxNOT_FOUND) || IsValid(n), wxT("invalid index in wxOwnerDrawnComboBox::Select") );
1052
1053     GetVListBoxComboPopup()->SetSelection(n);
1054
1055     wxString str;
1056     if ( n >= 0 )
1057         str = GetVListBoxComboPopup()->GetString(n);
1058
1059     // Refresh text portion in control
1060     if ( m_text )
1061         m_text->ChangeValue( str );
1062     else
1063         m_valueString = str;
1064
1065     Refresh();
1066 }
1067
1068 int wxOwnerDrawnComboBox::GetSelection() const
1069 {
1070     if ( !m_popupInterface )
1071         return m_initChs.Index(m_valueString);
1072
1073     return GetVListBoxComboPopup()->GetSelection();
1074 }
1075
1076 void wxOwnerDrawnComboBox::GetSelection(long *from, long *to) const
1077 {
1078     wxComboCtrl::GetSelection(from, to);
1079 }
1080
1081 int wxOwnerDrawnComboBox::DoInsertItems(const wxArrayStringsAdapter& items,
1082                                         unsigned int pos,
1083                                         void **clientData,
1084                                         wxClientDataType type)
1085 {
1086     EnsurePopupControl();
1087
1088     const unsigned int count = items.GetCount();
1089
1090     if ( HasFlag(wxCB_SORT) )
1091     {
1092         int n = pos;
1093
1094         for ( unsigned int i = 0; i < count; ++i )
1095         {
1096             n = GetVListBoxComboPopup()->Append(items[i]);
1097             AssignNewItemClientData(n, clientData, i, type);
1098         }
1099
1100         return n;
1101     }
1102     else
1103     {
1104         for ( unsigned int i = 0; i < count; ++i, ++pos )
1105         {
1106             GetVListBoxComboPopup()->Insert(items[i], pos);
1107             AssignNewItemClientData(pos, clientData, i, type);
1108         }
1109
1110         return pos - 1;
1111     }
1112 }
1113
1114 void wxOwnerDrawnComboBox::DoSetItemClientData(unsigned int n, void* clientData)
1115 {
1116     EnsurePopupControl();
1117
1118     GetVListBoxComboPopup()->SetItemClientData(n, clientData,
1119                                                GetClientDataType());
1120 }
1121
1122 void* wxOwnerDrawnComboBox::DoGetItemClientData(unsigned int n) const
1123 {
1124     if ( !m_popupInterface )
1125         return NULL;
1126
1127     return GetVListBoxComboPopup()->GetItemClientData(n);
1128 }
1129
1130 // ----------------------------------------------------------------------------
1131 // wxOwnerDrawnComboBox item drawing and measuring default implementations
1132 // ----------------------------------------------------------------------------
1133
1134 void wxOwnerDrawnComboBox::OnDrawItem( wxDC& dc,
1135                                        const wxRect& rect,
1136                                        int item,
1137                                        int flags ) const
1138 {
1139     if ( flags & wxODCB_PAINTING_CONTROL )
1140     {
1141         wxString text;
1142
1143         if ( !ShouldUseHintText() )
1144         {
1145             text = GetValue();
1146         }
1147         else
1148         {
1149             text = GetHint();
1150             wxColour col = wxSystemSettings::GetColour(wxSYS_COLOUR_GRAYTEXT);
1151             dc.SetTextForeground(col);
1152         }
1153
1154         dc.DrawText( text,
1155                      rect.x + GetMargins().x,
1156                      (rect.height-dc.GetCharHeight())/2 + rect.y );
1157     }
1158     else
1159     {
1160         dc.DrawText( GetVListBoxComboPopup()->GetString(item), rect.x + 2, rect.y );
1161     }
1162 }
1163
1164 wxCoord wxOwnerDrawnComboBox::OnMeasureItem( size_t WXUNUSED(item) ) const
1165 {
1166     return -1;
1167 }
1168
1169 wxCoord wxOwnerDrawnComboBox::OnMeasureItemWidth( size_t WXUNUSED(item) ) const
1170 {
1171     return -1;
1172 }
1173
1174 void wxOwnerDrawnComboBox::OnDrawBackground(wxDC& dc,
1175                                             const wxRect& rect,
1176                                             int WXUNUSED(item),
1177                                             int flags) const
1178 {
1179     // We need only to explicitly draw background for items
1180     // that should have selected background. Also, call PrepareBackground
1181     // always when painting the control so that clipping is done properly.
1182
1183     if ( (flags & wxODCB_PAINTING_SELECTED) ||
1184          ((flags & wxODCB_PAINTING_CONTROL) && HasFlag(wxCB_READONLY)) )
1185     {
1186         int bgFlags = wxCONTROL_SELECTED;
1187
1188         if ( !(flags & wxODCB_PAINTING_CONTROL) )
1189             bgFlags |= wxCONTROL_ISSUBMENU;
1190
1191         PrepareBackground(dc, rect, bgFlags);
1192     }
1193 }
1194
1195 #endif // wxUSE_ODCOMBOBOX