src/msw/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/msw/combobox.cpp
   3 // Purpose:     wxComboBox class
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_COMBOBOX
  28
  29 #include "wx/combobox.h"
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/msw/wrapcctl.h" // include <commctrl.h> "properly"
  33     #include "wx/settings.h"
  34     #include "wx/log.h"
  35     // for wxEVT_COMMAND_TEXT_ENTER
  36     #include "wx/textctrl.h"
  37     #include "wx/app.h"
  38     #include "wx/brush.h"
  39 #endif
  40
  41 #include "wx/clipbrd.h"
  42 #include "wx/wupdlock.h"
  43 #include "wx/msw/private.h"
  44
  45 #if wxUSE_UXTHEME
  46     #include "wx/msw/uxtheme.h"
  47 #endif
  48
  49 #if wxUSE_TOOLTIPS
  50     #include "wx/tooltip.h"
  51 #endif // wxUSE_TOOLTIPS
  52
  53 // ----------------------------------------------------------------------------
  54 // wxWin macros
  55 // ----------------------------------------------------------------------------
  56
  57 #if wxUSE_EXTENDED_RTTI
  58 WX_DEFINE_FLAGS( wxComboBoxStyle )
  59
  60 wxBEGIN_FLAGS( wxComboBoxStyle )
  61     // new style border flags, we put them first to
  62     // use them for streaming out
  63     wxFLAGS_MEMBER(wxBORDER_SIMPLE)
  64     wxFLAGS_MEMBER(wxBORDER_SUNKEN)
  65     wxFLAGS_MEMBER(wxBORDER_DOUBLE)
  66     wxFLAGS_MEMBER(wxBORDER_RAISED)
  67     wxFLAGS_MEMBER(wxBORDER_STATIC)
  68     wxFLAGS_MEMBER(wxBORDER_NONE)
  69
  70     // old style border flags
  71     wxFLAGS_MEMBER(wxSIMPLE_BORDER)
  72     wxFLAGS_MEMBER(wxSUNKEN_BORDER)
  73     wxFLAGS_MEMBER(wxDOUBLE_BORDER)
  74     wxFLAGS_MEMBER(wxRAISED_BORDER)
  75     wxFLAGS_MEMBER(wxSTATIC_BORDER)
  76     wxFLAGS_MEMBER(wxBORDER)
  77
  78     // standard window styles
  79     wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
  80     wxFLAGS_MEMBER(wxCLIP_CHILDREN)
  81     wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
  82     wxFLAGS_MEMBER(wxWANTS_CHARS)
  83     wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
  84     wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
  85     wxFLAGS_MEMBER(wxVSCROLL)
  86     wxFLAGS_MEMBER(wxHSCROLL)
  87
  88     wxFLAGS_MEMBER(wxCB_SIMPLE)
  89     wxFLAGS_MEMBER(wxCB_SORT)
  90     wxFLAGS_MEMBER(wxCB_READONLY)
  91     wxFLAGS_MEMBER(wxCB_DROPDOWN)
  92
  93 wxEND_FLAGS( wxComboBoxStyle )
  94
  95 IMPLEMENT_DYNAMIC_CLASS_XTI(wxComboBox, wxChoice,"wx/combobox.h")
  96
  97 wxBEGIN_PROPERTIES_TABLE(wxComboBox)
  98     wxEVENT_PROPERTY( Select , wxEVT_COMMAND_COMBOBOX_SELECTED , wxCommandEvent )
  99     wxEVENT_PROPERTY( TextEnter , wxEVT_COMMAND_TEXT_ENTER , wxCommandEvent )
 100
 101     // TODO DELEGATES
 102     wxPROPERTY( Font , wxFont , SetFont , GetFont  , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 103     wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 104     wxPROPERTY( Value ,wxString, SetValue, GetValue, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 105     wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
 106     wxPROPERTY_FLAGS( WindowStyle , wxComboBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
 107 wxEND_PROPERTIES_TABLE()
 108
 109 wxBEGIN_HANDLERS_TABLE(wxComboBox)
 110 wxEND_HANDLERS_TABLE()
 111
 112 wxCONSTRUCTOR_5( wxComboBox , wxWindow* , Parent , wxWindowID , Id , wxString , Value , wxPoint , Position , wxSize , Size )
 113
 114 #else
 115
 116 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxChoice)
 117
 118 #endif
 119
 120 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
 121     EVT_MENU(wxID_CUT, wxComboBox::OnCut)
 122     EVT_MENU(wxID_COPY, wxComboBox::OnCopy)
 123     EVT_MENU(wxID_PASTE, wxComboBox::OnPaste)
 124     EVT_MENU(wxID_UNDO, wxComboBox::OnUndo)
 125     EVT_MENU(wxID_REDO, wxComboBox::OnRedo)
 126     EVT_MENU(wxID_CLEAR, wxComboBox::OnDelete)
 127     EVT_MENU(wxID_SELECTALL, wxComboBox::OnSelectAll)
 128
 129     EVT_UPDATE_UI(wxID_CUT, wxComboBox::OnUpdateCut)
 130     EVT_UPDATE_UI(wxID_COPY, wxComboBox::OnUpdateCopy)
 131     EVT_UPDATE_UI(wxID_PASTE, wxComboBox::OnUpdatePaste)
 132     EVT_UPDATE_UI(wxID_UNDO, wxComboBox::OnUpdateUndo)
 133     EVT_UPDATE_UI(wxID_REDO, wxComboBox::OnUpdateRedo)
 134     EVT_UPDATE_UI(wxID_CLEAR, wxComboBox::OnUpdateDelete)
 135     EVT_UPDATE_UI(wxID_SELECTALL, wxComboBox::OnUpdateSelectAll)
 136 END_EVENT_TABLE()
 137
 138 // ----------------------------------------------------------------------------
 139 // function prototypes
 140 // ----------------------------------------------------------------------------
 141
 142 LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd,
 143                                             UINT message,
 144                                             WPARAM wParam,
 145                                             LPARAM lParam);
 146
 147 // ---------------------------------------------------------------------------
 148 // global vars
 149 // ---------------------------------------------------------------------------
 150
 151 // the pointer to standard radio button wnd proc
 152 static WNDPROC gs_wndprocEdit = (WNDPROC)NULL;
 153
 154 // ============================================================================
 155 // implementation
 156 // ============================================================================
 157
 158 // ----------------------------------------------------------------------------
 159 // wnd proc for subclassed edit control
 160 // ----------------------------------------------------------------------------
 161
 162 LRESULT APIENTRY _EXPORT wxComboEditWndProc(HWND hWnd,
 163                                             UINT message,
 164                                             WPARAM wParam,
 165                                             LPARAM lParam)
 166 {
 167     HWND hwndCombo = ::GetParent(hWnd);
 168     wxWindow *win = wxFindWinFromHandle((WXHWND)hwndCombo);
 169
 170     switch ( message )
 171     {
 172         // forward some messages to the combobox to generate the appropriate
 173         // wxEvents from them
 174         case WM_KEYUP:
 175         case WM_KEYDOWN:
 176         case WM_CHAR:
 177         case WM_SYSCHAR:
 178         case WM_SYSKEYDOWN:
 179         case WM_SYSKEYUP:
 180         case WM_SETFOCUS:
 181         case WM_KILLFOCUS:
 182             {
 183                 wxComboBox *combo = wxDynamicCast(win, wxComboBox);
 184                 if ( !combo )
 185                 {
 186                     // we can get WM_KILLFOCUS while our parent is already half
 187                     // destroyed and hence doesn't look like a combobx any
 188                     // longer, check for it to avoid bogus assert failures
 189                     if ( !win->IsBeingDeleted() )
 190                     {
 191                         wxFAIL_MSG( _T("should have combo as parent") );
 192                     }
 193                 }
 194                 else if ( combo->MSWProcessEditMsg(message, wParam, lParam) )
 195                 {
 196                     // handled by parent
 197                     return 0;
 198                 }
 199             }
 200             break;
 201
 202         case WM_GETDLGCODE:
 203             {
 204                 wxCHECK_MSG( win, 0, _T("should have a parent") );
 205
 206                 if ( win->GetWindowStyle() & wxTE_PROCESS_ENTER )
 207                 {
 208                     // need to return a custom dlg code or we'll never get it
 209                     return DLGC_WANTMESSAGE;
 210                 }
 211             }
 212             break;
 213     }
 214
 215     return ::CallWindowProc(CASTWNDPROC gs_wndprocEdit, hWnd, message, wParam, lParam);
 216 }
 217
 218 // ----------------------------------------------------------------------------
 219 // wxComboBox callbacks
 220 // ----------------------------------------------------------------------------
 221
 222 WXLRESULT wxComboBox::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
 223 {
 224     // TODO: handle WM_CTLCOLOR messages from our EDIT control to be able to
 225     //       set its colour correctly (to be the same as our own one)
 226
 227     switch ( nMsg )
 228     {
 229         case WM_SIZE:
 230         // wxStaticBox can generate this message, when modifying the control's style.
 231         // This causes the content of the combobox to be selected, for some reason.
 232         case WM_STYLECHANGED:
 233             {
 234                 // combobox selection sometimes spontaneously changes when its
 235                 // size changes, restore it to the old value if necessary
 236                 if ( !GetEditHWNDIfAvailable() )
 237                     break;
 238
 239                 long fromOld, toOld;
 240                 GetSelection(&fromOld, &toOld);
 241
 242                 // if an editable combobox has a not empty text not from the
 243                 // list, it tries to autocomplete it from the list when it is
 244                 // resized, but we don't want this to happen as it doesn't seem
 245                 // to make any sense, so we forcefully restore the old text
 246                 wxString textOld;
 247                 if ( !HasFlag(wxCB_READONLY) && GetCurrentSelection() == -1 )
 248                     textOld = GetValue();
 249
 250                 // eliminate flickering during following hacks
 251                 wxWindowUpdateLocker lock(this);
 252
 253                 WXLRESULT result = wxChoice::MSWWindowProc(nMsg, wParam, lParam);
 254
 255                 if ( !textOld.empty() && GetValue() != textOld )
 256                     SetLabel(textOld);
 257
 258                 long fromNew, toNew;
 259                 GetSelection(&fromNew, &toNew);
 260
 261                 if ( fromOld != fromNew || toOld != toNew )
 262                 {
 263                     SetSelection(fromOld, toOld);
 264                 }
 265
 266                 return result;
 267             }
 268     }
 269
 270     return wxChoice::MSWWindowProc(nMsg, wParam, lParam);
 271 }
 272
 273 bool wxComboBox::MSWProcessEditMsg(WXUINT msg, WXWPARAM wParam, WXLPARAM lParam)
 274 {
 275     switch ( msg )
 276     {
 277         case WM_CHAR:
 278             // for compatibility with wxTextCtrl, generate a special message
 279             // when Enter is pressed
 280             if ( wParam == VK_RETURN )
 281             {
 282                 if (SendMessage(GetHwnd(), CB_GETDROPPEDSTATE, 0, 0))
 283                     return false;
 284
 285                 wxCommandEvent event(wxEVT_COMMAND_TEXT_ENTER, m_windowId);
 286
 287                 const int sel = GetSelection();
 288                 event.SetInt(sel);
 289                 event.SetString(GetValue());
 290                 InitCommandEventWithItems(event, sel);
 291
 292                 if ( ProcessCommand(event) )
 293                 {
 294                     // don't let the event through to the native control
 295                     // because it doesn't need it and may generate an annoying
 296                     // beep if it gets it
 297                     return true;
 298                 }
 299             }
 300             // fall through
 301
 302         case WM_SYSCHAR:
 303             return HandleChar(wParam, lParam, true /* isASCII */);
 304
 305         case WM_SYSKEYDOWN:
 306         case WM_KEYDOWN:
 307             return HandleKeyDown(wParam, lParam);
 308
 309         case WM_SYSKEYUP:
 310         case WM_KEYUP:
 311             return HandleKeyUp(wParam, lParam);
 312
 313         case WM_SETFOCUS:
 314             return HandleSetFocus((WXHWND)wParam);
 315
 316         case WM_KILLFOCUS:
 317             return HandleKillFocus((WXHWND)wParam);
 318
 319         case WM_CUT:
 320         case WM_COPY:
 321         case WM_PASTE:
 322             return HandleClipboardEvent(msg);
 323     }
 324
 325     return false;
 326 }
 327
 328 bool wxComboBox::MSWCommand(WXUINT param, WXWORD id)
 329 {
 330     int sel = -1;
 331     wxString value;
 332
 333     switch ( param )
 334     {
 335         case CBN_DROPDOWN:
 336             // remember the last selection, just as wxChoice does
 337             m_lastAcceptedSelection = GetCurrentSelection();
 338             if ( m_lastAcceptedSelection == -1 )
 339             {
 340                 // but unlike with wxChoice we may have no selection but still
 341                 // have some text and we should avoid erasing it if the drop
 342                 // down is cancelled (see #8474)
 343                 m_lastAcceptedSelection = wxID_NONE;
 344             }
 345             break;
 346
 347         case CBN_SELENDOK:
 348 #ifndef __SMARTPHONE__
 349             // we need to reset this to prevent the selection from being undone
 350             // by wxChoice, see wxChoice::MSWCommand() and comments there
 351             m_lastAcceptedSelection = wxID_NONE;
 352 #endif
 353
 354             // set these variables so that they could be also fixed in
 355             // CBN_EDITCHANGE below
 356             sel = GetSelection();
 357             value = GetStringSelection();
 358
 359             // this string is going to become the new combobox value soon but
 360             // we need it to be done right now, otherwise the event handler
 361             // could get a wrong value when it calls our GetValue()
 362             ::SetWindowText(GetHwnd(), value.wx_str());
 363
 364             {
 365                 wxCommandEvent event(wxEVT_COMMAND_COMBOBOX_SELECTED, GetId());
 366                 event.SetInt(sel);
 367                 event.SetString(value);
 368                 InitCommandEventWithItems(event, sel);
 369
 370                 ProcessCommand(event);
 371             }
 372
 373             // fall through: for compability with wxGTK, also send the text
 374             // update event when the selection changes (this also seems more
 375             // logical as the text does change)
 376
 377         case CBN_EDITCHANGE:
 378             if ( m_allowTextEvents )
 379             {
 380                 wxCommandEvent event(wxEVT_COMMAND_TEXT_UPDATED, GetId());
 381
 382                 // if sel != -1, value was already initialized above
 383                 if ( sel == -1 )
 384                 {
 385                     value = wxGetWindowText(GetHwnd());
 386                 }
 387
 388                 event.SetString(value);
 389                 InitCommandEventWithItems(event, sel);
 390
 391                 ProcessCommand(event);
 392             }
 393             break;
 394
 395         default:
 396             return wxChoice::MSWCommand(param, id);
 397     }
 398
 399     // skip wxChoice version as it would generate its own events for
 400     // CBN_SELENDOK and also interfere with our handling of CBN_DROPDOWN
 401     return true;
 402 }
 403
 404 bool wxComboBox::MSWShouldPreProcessMessage(WXMSG *pMsg)
 405 {
 406     // prevent command accelerators from stealing editing
 407     // hotkeys when we have the focus
 408     if (wxIsCtrlDown())
 409     {
 410         WPARAM vkey = pMsg->wParam;
 411
 412         switch (vkey)
 413         {
 414             case 'C':
 415             case 'V':
 416             case 'X':
 417             case VK_INSERT:
 418             case VK_DELETE:
 419             case VK_HOME:
 420             case VK_END:
 421                 return false;
 422         }
 423     }
 424
 425     return wxChoice::MSWShouldPreProcessMessage(pMsg);
 426 }
 427
 428 WXHWND wxComboBox::GetEditHWNDIfAvailable() const
 429 {
 430     // notice that a slightly safer alternative could be to use FindWindowEx()
 431     // but it's not available under WinCE so just take the first child for now
 432     // to keep one version of the code for all platforms and fix it later if
 433     // problems are discovered
 434
 435     // we assume that the only child of the combobox is the edit window
 436     return (WXHWND)::GetWindow(GetHwnd(), GW_CHILD);
 437 }
 438
 439 WXHWND wxComboBox::GetEditHWND() const
 440 {
 441     // this function should not be called for wxCB_READONLY controls, it is
 442     // the callers responsibility to check this
 443     wxASSERT_MSG( !HasFlag(wxCB_READONLY),
 444                   _T("read-only combobox doesn't have any edit control") );
 445
 446     WXHWND hWndEdit = GetEditHWNDIfAvailable();
 447     wxASSERT_MSG( hWndEdit, _T("combobox without edit control?") );
 448
 449     return hWndEdit;
 450 }
 451
 452 wxWindow *wxComboBox::GetEditableWindow()
 453 {
 454     wxASSERT_MSG( !HasFlag(wxCB_READONLY),
 455                   _T("read-only combobox doesn't have any edit control") );
 456
 457     return this;
 458 }
 459
 460 // ----------------------------------------------------------------------------
 461 // wxComboBox creation
 462 // ----------------------------------------------------------------------------
 463
 464 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
 465                         const wxString& value,
 466                         const wxPoint& pos,
 467                         const wxSize& size,
 468                         int n, const wxString choices[],
 469                         long style,
 470                         const wxValidator& validator,
 471                         const wxString& name)
 472 {
 473     // pretend that wxComboBox is hidden while it is positioned and resized and
 474     // show it only right before leaving this method because otherwise there is
 475     // some noticeable flicker while the control rearranges itself
 476     m_isShown = false;
 477
 478     if ( !CreateAndInit(parent, id, pos, size, n, choices, style,
 479                         validator, name) )
 480         return false;
 481
 482     // we shouldn't call SetValue() for an empty string because this would
 483     // (correctly) result in an assert with a read only combobox and is useless
 484     // for the other ones anyhow
 485     if ( !value.empty() )
 486         SetValue(value);
 487
 488     // a (not read only) combobox is, in fact, 2 controls: the combobox itself
 489     // and an edit control inside it and if we want to catch events from this
 490     // edit control, we must subclass it as well
 491     if ( !(style & wxCB_READONLY) )
 492     {
 493         gs_wndprocEdit = wxSetWindowProc((HWND)GetEditHWND(), wxComboEditWndProc);
 494     }
 495
 496     // and finally, show the control
 497     Show(true);
 498
 499     return true;
 500 }
 501
 502 bool wxComboBox::Create(wxWindow *parent, wxWindowID id,
 503                         const wxString& value,
 504                         const wxPoint& pos,
 505                         const wxSize& size,
 506                         const wxArrayString& choices,
 507                         long style,
 508                         const wxValidator& validator,
 509                         const wxString& name)
 510 {
 511     wxCArrayString chs(choices);
 512     return Create(parent, id, value, pos, size, chs.GetCount(),
 513                   chs.GetStrings(), style, validator, name);
 514 }
 515
 516 WXDWORD wxComboBox::MSWGetStyle(long style, WXDWORD *exstyle) const
 517 {
 518     // we never have an external border
 519     WXDWORD msStyle = wxChoice::MSWGetStyle
 520                       (
 521                         (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
 522                       );
 523
 524     // usually WS_TABSTOP is added by wxControl::MSWGetStyle() but as we're
 525     // created hidden (see Create() above), it is not done for us but we still
 526     // want to have this style
 527     msStyle |= WS_TABSTOP;
 528
 529     // remove the style always added by wxChoice
 530     msStyle &= ~CBS_DROPDOWNLIST;
 531
 532     if ( style & wxCB_READONLY )
 533         msStyle |= CBS_DROPDOWNLIST;
 534 #ifndef __WXWINCE__
 535     else if ( style & wxCB_SIMPLE )
 536         msStyle |= CBS_SIMPLE; // A list (shown always) and edit control
 537 #endif
 538     else
 539         msStyle |= CBS_DROPDOWN;
 540
 541     // there is no reason to not always use CBS_AUTOHSCROLL, so do use it
 542     msStyle |= CBS_AUTOHSCROLL;
 543
 544     // NB: we used to also add CBS_NOINTEGRALHEIGHT here but why?
 545
 546     return msStyle;
 547 }
 548
 549 // ----------------------------------------------------------------------------
 550 // wxComboBox text control-like methods
 551 // ----------------------------------------------------------------------------
 552
 553 wxString wxComboBox::GetValue() const
 554 {
 555     return HasFlag(wxCB_READONLY) ? GetStringSelection()
 556                                   : wxTextEntry::GetValue();
 557 }
 558
 559 void wxComboBox::SetValue(const wxString& value)
 560 {
 561     if ( HasFlag(wxCB_READONLY) )
 562         SetStringSelection(value);
 563     else
 564         wxTextEntry::SetValue(value);
 565 }
 566
 567 void wxComboBox::Clear()
 568 {
 569     wxChoice::Clear();
 570     if ( !HasFlag(wxCB_READONLY) )
 571         wxTextEntry::Clear();
 572 }
 573
 574 void wxComboBox::GetSelection(long *from, long *to) const
 575 {
 576     if ( !HasFlag(wxCB_READONLY) )
 577     {
 578         wxTextEntry::GetSelection(from, to);
 579     }
 580     else // text selection doesn't make sense for read only comboboxes
 581     {
 582         if ( from )
 583             *from = -1;
 584         if ( to )
 585             *to = -1;
 586     }
 587 }
 588
 589 bool wxComboBox::IsEditable() const
 590 {
 591     return !HasFlag(wxCB_READONLY) && wxTextEntry::IsEditable();
 592 }
 593
 594 // ----------------------------------------------------------------------------
 595 // standard event handling
 596 // ----------------------------------------------------------------------------
 597
 598 void wxComboBox::OnCut(wxCommandEvent& WXUNUSED(event))
 599 {
 600     Cut();
 601 }
 602
 603 void wxComboBox::OnCopy(wxCommandEvent& WXUNUSED(event))
 604 {
 605     Copy();
 606 }
 607
 608 void wxComboBox::OnPaste(wxCommandEvent& WXUNUSED(event))
 609 {
 610     Paste();
 611 }
 612
 613 void wxComboBox::OnUndo(wxCommandEvent& WXUNUSED(event))
 614 {
 615     Undo();
 616 }
 617
 618 void wxComboBox::OnRedo(wxCommandEvent& WXUNUSED(event))
 619 {
 620     Redo();
 621 }
 622
 623 void wxComboBox::OnDelete(wxCommandEvent& WXUNUSED(event))
 624 {
 625     RemoveSelection();
 626 }
 627
 628 void wxComboBox::OnSelectAll(wxCommandEvent& WXUNUSED(event))
 629 {
 630     SelectAll();
 631 }
 632
 633 void wxComboBox::OnUpdateCut(wxUpdateUIEvent& event)
 634 {
 635     event.Enable( CanCut() );
 636 }
 637
 638 void wxComboBox::OnUpdateCopy(wxUpdateUIEvent& event)
 639 {
 640     event.Enable( CanCopy() );
 641 }
 642
 643 void wxComboBox::OnUpdatePaste(wxUpdateUIEvent& event)
 644 {
 645     event.Enable( CanPaste() );
 646 }
 647
 648 void wxComboBox::OnUpdateUndo(wxUpdateUIEvent& event)
 649 {
 650     event.Enable( IsEditable() && CanUndo() );
 651 }
 652
 653 void wxComboBox::OnUpdateRedo(wxUpdateUIEvent& event)
 654 {
 655     event.Enable( IsEditable() && CanRedo() );
 656 }
 657
 658 void wxComboBox::OnUpdateDelete(wxUpdateUIEvent& event)
 659 {
 660     event.Enable(IsEditable() && HasSelection());
 661 }
 662
 663 void wxComboBox::OnUpdateSelectAll(wxUpdateUIEvent& event)
 664 {
 665     event.Enable(IsEditable() && !wxTextEntry::IsEmpty());
 666 }
 667
 668 #if wxUSE_TOOLTIPS
 669
 670 void wxComboBox::DoSetToolTip(wxToolTip *tip)
 671 {
 672     wxChoice::DoSetToolTip(tip);
 673
 674     if ( tip && !HasFlag(wxCB_READONLY) )
 675         tip->Add(GetEditHWND());
 676 }
 677
 678 #endif // wxUSE_TOOLTIPS
 679
 680 #if wxUSE_UXTHEME
 681
 682 bool wxComboBox::SetHint(const wxString& hintOrig)
 683 {
 684     wxString hint(hintOrig);
 685     if ( wxUxThemeEngine::GetIfActive() )
 686     {
 687         // under XP (but not Vista) there is a bug in cue banners
 688         // implementation for combobox edit control: the first character is
 689         // partially chopped off, so prepend a space to make it fully visible
 690         hint.insert(0, " ");
 691     }
 692
 693     return wxTextEntry::SetHint(hint);
 694 }
 695
 696 #endif // wxUSE_UXTHEME
 697
 698 #endif // wxUSE_COMBOBOX