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