src/univ/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/combobox.cpp
   3 // Purpose:     wxComboControl and wxComboBox implementation
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     15.12.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 /*
  13     TODO:
  14
  15    +1. typing in the text should select the string in listbox
  16    +2. scrollbars in listbox are unusable
  17    +3. the initially selected item is not selected
  18    ?4. kbd interface (what does GTK do?)
  19     5. there is still autoscrolling without scrollbars - but is it bad?
  20  */
  21
  22 // ============================================================================
  23 // declarations
  24 // ============================================================================
  25
  26 // ----------------------------------------------------------------------------
  27 // headers
  28 // ----------------------------------------------------------------------------
  29
  30 #ifdef __GNUG__
  31     #pragma implementation "univcombobox.h"
  32 #endif
  33
  34 #include "wx/wxprec.h"
  35
  36 #ifdef __BORLANDC__
  37     #pragma hdrstop
  38 #endif
  39
  40 #if wxUSE_COMBOBOX
  41
  42 #ifndef WX_PRECOMP
  43     #include "wx/log.h"
  44
  45     #include "wx/button.h"
  46     #include "wx/combobox.h"
  47     #include "wx/listbox.h"
  48     #include "wx/textctrl.h"
  49     #include "wx/bmpbuttn.h"
  50
  51     #include "wx/validate.h"
  52 #endif
  53
  54 #include "wx/popupwin.h"
  55
  56 #include "wx/univ/renderer.h"
  57 #include "wx/univ/inphand.h"
  58 #include "wx/univ/theme.h"
  59
  60 /*
  61    The keyboard event flow:
  62
  63    1. they always come to the text ctrl
  64    2. it forwards the ones it doesn't process to the wxComboControl
  65    3. which passes them to the popup window if it is popped up
  66  */
  67
  68 // ----------------------------------------------------------------------------
  69 // wxComboButton is just a normal button except that it sends commands to the
  70 // combobox and not its parent
  71 // ----------------------------------------------------------------------------
  72
  73 class wxComboButton : public wxBitmapButton
  74 {
  75 public:
  76     wxComboButton(wxComboControl *combo)
  77         : wxBitmapButton(combo->GetParent(), -1, wxNullBitmap,
  78                          wxDefaultPosition, wxDefaultSize,
  79                          wxBORDER_NONE)
  80     {
  81         m_combo = combo;
  82
  83         wxBitmap bmpNormal, bmpPressed, bmpDisabled;
  84
  85         GetRenderer()->GetComboBitmaps(&bmpNormal, &bmpPressed, &bmpDisabled);
  86         SetBitmapLabel(bmpNormal);
  87         SetBitmapFocus(bmpNormal);
  88         SetBitmapSelected(bmpPressed);
  89         SetBitmapDisabled(bmpDisabled);
  90
  91         SetSize(bmpNormal.GetWidth(), bmpNormal.GetHeight());
  92     }
  93
  94 protected:
  95     void OnButton(wxCommandEvent& event) { m_combo->ShowPopup(); }
  96
  97     virtual wxSize DoGetBestSize() const { return GetSize(); }
  98
  99 private:
 100     wxComboControl *m_combo;
 101
 102     DECLARE_EVENT_TABLE()
 103 };
 104
 105 // ----------------------------------------------------------------------------
 106 // wxComboListBox is a listbox modified to be used as a popup window in a
 107 // combobox
 108 // ----------------------------------------------------------------------------
 109
 110 class wxComboListBox : public wxListBox, public wxComboPopup
 111 {
 112 public:
 113     // ctor and dtor
 114     wxComboListBox(wxComboControl *combo, int style = 0);
 115     virtual ~wxComboListBox();
 116
 117     // implement wxComboPopup methods
 118     virtual bool SetSelection(const wxString& value);
 119     virtual wxControl *GetControl() { return this; }
 120     virtual void OnShow();
 121
 122 protected:
 123     // we shouldn't return height too big from here
 124     virtual wxSize DoGetBestClientSize() const;
 125
 126     // filter mouse move events happening outside the list box
 127     void OnMouseMove(wxMouseEvent& event);
 128
 129     // called whenever the user selects or activates a listbox item
 130     void OnSelect(wxCommandEvent& event);
 131
 132     // used to process wxUniv actions
 133     bool PerformAction(const wxControlAction& action,
 134                        long numArg,
 135                        const wxString& strArg);
 136
 137 private:
 138     DECLARE_EVENT_TABLE()
 139 };
 140
 141 // ----------------------------------------------------------------------------
 142 // wxComboTextCtrl is a simple text ctrl which forwards
 143 // wxEVT_COMMAND_TEXT_UPDATED events and all key events to the combobox
 144 // ----------------------------------------------------------------------------
 145
 146 class wxComboTextCtrl : public wxTextCtrl
 147 {
 148 public:
 149     wxComboTextCtrl(wxComboControl *combo,
 150                     const wxString& value,
 151                     long style,
 152                     const wxValidator& validator);
 153
 154 protected:
 155     void OnKey(wxKeyEvent& event);
 156     void OnText(wxCommandEvent& event);
 157
 158 private:
 159     wxComboControl *m_combo;
 160
 161     DECLARE_EVENT_TABLE()
 162 };
 163
 164 // ----------------------------------------------------------------------------
 165 // event tables and such
 166 // ----------------------------------------------------------------------------
 167
 168 BEGIN_EVENT_TABLE(wxComboButton, wxButton)
 169     EVT_BUTTON(-1, wxComboButton::OnButton)
 170 END_EVENT_TABLE()
 171
 172 BEGIN_EVENT_TABLE(wxComboListBox, wxListBox)
 173     EVT_LISTBOX(-1, wxComboListBox::OnSelect)
 174     EVT_LISTBOX_DCLICK(-1, wxComboListBox::OnSelect)
 175     EVT_MOTION(wxComboListBox::OnMouseMove)
 176 END_EVENT_TABLE()
 177
 178 BEGIN_EVENT_TABLE(wxComboControl, wxControl)
 179     EVT_KEY_DOWN(wxComboControl::OnKey)
 180     EVT_KEY_UP(wxComboControl::OnKey)
 181 END_EVENT_TABLE()
 182
 183 BEGIN_EVENT_TABLE(wxComboTextCtrl, wxTextCtrl)
 184     EVT_KEY_DOWN(wxComboTextCtrl::OnKey)
 185     EVT_KEY_UP(wxComboTextCtrl::OnKey)
 186     EVT_TEXT(-1, wxComboTextCtrl::OnText)
 187 END_EVENT_TABLE()
 188
 189 IMPLEMENT_DYNAMIC_CLASS(wxComboBox, wxControl);
 190
 191 // ============================================================================
 192 // implementation
 193 // ============================================================================
 194
 195 // ----------------------------------------------------------------------------
 196 // wxComboControl creation
 197 // ----------------------------------------------------------------------------
 198
 199 void wxComboControl::Init()
 200 {
 201     m_popup = (wxComboPopup *)NULL;
 202     m_winPopup = (wxPopupComboWindow *)NULL;
 203     m_isPopupShown = FALSE;
 204 }
 205
 206 bool wxComboControl::Create(wxWindow *parent,
 207                             wxWindowID id,
 208                             const wxString& value,
 209                             const wxPoint& pos,
 210                             const wxSize& size,
 211                             long style,
 212                             const wxValidator& validator,
 213                             const wxString& name)
 214 {
 215     // first create our own window, i.e. the one which will contain all
 216     // subcontrols
 217     style &= ~wxBORDER_NONE;
 218     style |= wxBORDER_SUNKEN;
 219     if ( !wxControl::Create(parent, id, pos, size, style, validator, name) )
 220         return FALSE;
 221
 222     // create the text control and the button as our siblings (*not* children),
 223     // don't care about size/position here - they will be set in DoMoveWindow()
 224     m_btn = new wxComboButton(this);
 225     m_text = new wxComboTextCtrl(this,
 226                                  value,
 227                                  style & wxCB_READONLY ? wxTE_READONLY : 0,
 228                                  validator);
 229
 230     // for compatibility with the other ports, the height specified is the
 231     // combined height of the combobox itself and the popup
 232     if ( size.y == -1 )
 233     {
 234         // ok, use default height for popup too
 235         m_heightPopup = -1;
 236     }
 237     else
 238     {
 239         m_heightPopup = size.y - DoGetBestSize().y;
 240     }
 241
 242     DoSetSize(pos.x, pos.y, size.x, size.y);
 243
 244     // create the popup window immediately here to allow creating the controls
 245     // with parent == GetPopupWindow() from the derived class ctor
 246     m_winPopup = new wxPopupComboWindow(this);
 247
 248     // have to disable this window to avoid interfering it with message
 249     // processing to the text and the button... but pretend it is enabled to
 250     // make IsEnabled() return TRUE
 251     wxControl::Enable(FALSE); // don't use non virtual Disable() here!
 252     m_isEnabled = TRUE;
 253
 254     CreateInputHandler(wxINP_HANDLER_COMBOBOX);
 255
 256     return TRUE;
 257 }
 258
 259 wxComboControl::~wxComboControl()
 260 {
 261     // as the button and the text control are the parent's children and not
 262     // ours, we have to delete them manually - they are not deleted
 263     // automatically by wxWindows when we're deleted
 264     delete m_btn;
 265     delete m_text;
 266
 267     delete m_winPopup;
 268 }
 269
 270 // ----------------------------------------------------------------------------
 271 // geometry stuff
 272 // ----------------------------------------------------------------------------
 273
 274 void wxComboControl::DoSetSize(int x, int y,
 275                                int width, int height,
 276                                int sizeFlags)
 277 {
 278     // combo height is always fixed
 279     wxControl::DoSetSize(x, y, width, DoGetBestSize().y, sizeFlags);
 280 }
 281
 282 wxSize wxComboControl::DoGetBestClientSize() const
 283 {
 284     wxSize sizeBtn = m_btn->GetBestSize(),
 285            sizeText = m_text->GetBestSize();
 286
 287     return wxSize(sizeBtn.x + sizeText.x, wxMax(sizeBtn.y, sizeText.y));
 288 }
 289
 290 void wxComboControl::DoMoveWindow(int x, int y, int width, int height)
 291 {
 292     wxControl::DoMoveWindow(x, y, width, height);
 293
 294     // position the subcontrols inside the client area
 295     wxRect rectBorders = GetRenderer()->GetBorderDimensions(GetBorder());
 296     x += rectBorders.x;
 297     y += rectBorders.y;
 298     width -= rectBorders.x + rectBorders.width;
 299     height -= rectBorders.y + rectBorders.height;
 300
 301     wxSize sizeBtn = m_btn->GetSize(),
 302            sizeText = m_text->GetSize();
 303
 304     wxCoord wText = width - sizeBtn.x;
 305     m_text->SetSize(x, y, wText, height);
 306     m_btn->SetSize(x + wText, y, -1, height);
 307 }
 308
 309 // ----------------------------------------------------------------------------
 310 // operations
 311 // ----------------------------------------------------------------------------
 312
 313 bool wxComboControl::Enable(bool enable)
 314 {
 315     if ( !wxControl::Enable(enable) )
 316         return FALSE;
 317
 318     m_btn->Enable(enable);
 319     m_text->Enable(enable);
 320
 321     return TRUE;
 322 }
 323
 324 bool wxComboControl::Show(bool show)
 325 {
 326     if ( !wxControl::Show(show) )
 327         return FALSE;
 328
 329     m_btn->Show(show);
 330     m_text->Show(show);
 331
 332     return TRUE;
 333 }
 334
 335 // ----------------------------------------------------------------------------
 336 // popup window handling
 337 // ----------------------------------------------------------------------------
 338
 339 void wxComboControl::SetPopupControl(wxComboPopup *popup)
 340 {
 341     m_popup = popup;
 342 }
 343
 344 void wxComboControl::ShowPopup()
 345 {
 346     wxCHECK_RET( m_popup, _T("no popup to show in wxComboControl") );
 347     wxCHECK_RET( !IsPopupShown(), _T("popup window already shown") );
 348
 349     wxControl *control = m_popup->GetControl();
 350
 351     // size and position the popup window correctly
 352     m_winPopup->SetSize(GetSize().x,
 353                         m_heightPopup == -1 ? control->GetBestSize().y
 354                                             : m_heightPopup);
 355     wxSize sizePopup = m_winPopup->GetClientSize();
 356     control->SetSize(0, 0, sizePopup.x, sizePopup.y);
 357
 358     // some controls don't accept the size we give then: e.g. a listbox may
 359     // require more space to show its last row
 360     wxSize sizeReal = control->GetSize();
 361     if ( sizeReal != sizePopup )
 362     {
 363         m_winPopup->SetClientSize(sizeReal);
 364     }
 365
 366     m_winPopup->PositionNearCombo();
 367
 368     // show it
 369     m_winPopup->Popup(m_text);
 370     m_text->SelectAll();
 371     m_popup->SetSelection(m_text->GetValue());
 372
 373     m_isPopupShown = TRUE;
 374 }
 375
 376 void wxComboControl::HidePopup()
 377 {
 378     wxCHECK_RET( m_popup, _T("no popup to hide in wxComboControl") );
 379     wxCHECK_RET( IsPopupShown(), _T("popup window not shown") );
 380
 381     m_winPopup->Dismiss();
 382
 383     m_isPopupShown = FALSE;
 384 }
 385
 386 void wxComboControl::OnSelect(const wxString& value)
 387 {
 388     m_text->SetValue(value);
 389     m_text->SelectAll();
 390
 391     OnDismiss();
 392 }
 393
 394 void wxComboControl::OnDismiss()
 395 {
 396     HidePopup();
 397     m_text->SetFocus();
 398 }
 399
 400 // ----------------------------------------------------------------------------
 401 // wxComboTextCtrl
 402 // ----------------------------------------------------------------------------
 403
 404 wxComboTextCtrl::wxComboTextCtrl(wxComboControl *combo,
 405                                  const wxString& value,
 406                                  long style,
 407                                  const wxValidator& validator)
 408                : wxTextCtrl(combo->GetParent(), -1, value,
 409                             wxDefaultPosition, wxDefaultSize,
 410                             wxBORDER_NONE | style,
 411                             validator)
 412 {
 413     m_combo = combo;
 414 }
 415
 416 void wxComboTextCtrl::OnText(wxCommandEvent& event)
 417 {
 418     if ( m_combo->IsPopupShown() )
 419     {
 420         m_combo->GetPopupControl()->SetSelection(GetValue());
 421     }
 422
 423     // we need to make a copy of the event to have the correct originating
 424     // object and id
 425     wxCommandEvent event2 = event;
 426     event2.SetEventObject(m_combo);
 427     event2.SetId(m_combo->GetId());
 428
 429     // there is a small incompatibility with wxMSW here: the combobox gets the
 430     // event before the text control in our case which corresponds to SMW
 431     // CBN_EDITUPDATE notification and not CBN_EDITCHANGE one wxMSW currently
 432     // uses
 433     //
 434     // if this is really a problem, we can play games with the event handlers
 435     // to circumvent this
 436     (void)m_combo->ProcessEvent(event2);
 437
 438     event.Skip();
 439 }
 440
 441 // pass the keys we don't process to the combo first
 442 void wxComboTextCtrl::OnKey(wxKeyEvent& event)
 443 {
 444     switch ( event.GetKeyCode() )
 445     {
 446         case WXK_RETURN:
 447             // the popup control gets it first but only if it is shown
 448             if ( !m_combo->IsPopupShown() )
 449                 break;
 450             //else: fall through
 451
 452         case WXK_UP:
 453         case WXK_DOWN:
 454         case WXK_ESCAPE:
 455         case WXK_PAGEDOWN:
 456         case WXK_PAGEUP:
 457         case WXK_PRIOR:
 458         case WXK_NEXT:
 459             (void)m_combo->ProcessEvent(event);
 460             return;
 461     }
 462
 463     event.Skip();
 464 }
 465
 466 // ----------------------------------------------------------------------------
 467 // wxComboListBox
 468 // ----------------------------------------------------------------------------
 469
 470 wxComboListBox::wxComboListBox(wxComboControl *combo, int style)
 471               : wxListBox(combo->GetPopupWindow(), -1,
 472                           wxDefaultPosition, wxDefaultSize,
 473                           0, NULL,
 474                           wxBORDER_SIMPLE | wxLB_INT_HEIGHT | style),
 475                 wxComboPopup(combo)
 476 {
 477     // we don't react to the mouse events outside the window at all
 478     StopAutoScrolling();
 479 }
 480
 481 wxComboListBox::~wxComboListBox()
 482 {
 483 }
 484
 485 bool wxComboListBox::SetSelection(const wxString& value)
 486 {
 487     // FindItem() would just find the current item for an empty string (it
 488     // always matches), but we want to show the first one in such case
 489     if ( value.empty() )
 490     {
 491         if ( GetCount() )
 492         {
 493             wxListBox::SetSelection(0);
 494         }
 495         //else: empty listbox - nothing to do
 496     }
 497     else if ( !FindItem(value) )
 498     {
 499         // no match att all
 500         return FALSE;
 501     }
 502
 503     return TRUE;
 504 }
 505
 506 void wxComboListBox::OnSelect(wxCommandEvent& event)
 507 {
 508     // first let the user code have the event
 509
 510     // all fields are already filled by the listbox, just change the event
 511     // type and send it to the combo
 512     wxCommandEvent event2 = event;
 513     event2.SetEventType(wxEVT_COMMAND_COMBOBOX_SELECTED);
 514     event2.SetEventObject(m_combo);
 515     event2.SetId(m_combo->GetId());
 516     m_combo->ProcessEvent(event2);
 517
 518     // next update the combo and close the listbox
 519     m_combo->OnSelect(event.GetString());
 520 }
 521
 522 void wxComboListBox::OnShow()
 523 {
 524 }
 525
 526 bool wxComboListBox::PerformAction(const wxControlAction& action,
 527                                    long numArg,
 528                                    const wxString& strArg)
 529
 530 {
 531     if ( action == wxACTION_LISTBOX_FIND )
 532     {
 533         // we don't let the listbox handle this as instead of just using the
 534         // single key presses, as usual, we use the text ctrl value as prefix
 535         // and this is done by wxComboControl itself
 536         return TRUE;
 537     }
 538
 539     return wxListBox::PerformAction(action, numArg, strArg);
 540 }
 541
 542 void wxComboListBox::OnMouseMove(wxMouseEvent& event)
 543 {
 544     // while a wxComboListBox is shown, it always has capture, so if it doesn't
 545     // we're about to go away anyhow (normally this shouldn't happen at all,
 546     // but I don't put assert here as it just might do on other platforms and
 547     // it doesn't break anythign anyhow)
 548     if ( this == wxWindow::GetCapture() )
 549     {
 550         if ( HitTest(event.GetPosition()) == wxHT_WINDOW_INSIDE )
 551         {
 552             event.Skip();
 553         }
 554         //else: popup shouldn't react to the mouse motions outside it, it only
 555         //      captures the mouse to be able to detect when it must be
 556         //      dismissed, so don't call Skip()
 557     }
 558 }
 559
 560 wxSize wxComboListBox::DoGetBestClientSize() const
 561 {
 562     // don't return size too big or we risk to not fit on the screen
 563     wxSize size = wxListBox::DoGetBestClientSize();
 564     wxCoord hChar = GetCharHeight();
 565
 566     int nLines = size.y / hChar;
 567
 568     // 10 is the same limit as used by wxMSW
 569     if ( nLines > 10 )
 570     {
 571         size.y = 10*hChar;
 572     }
 573
 574     return size;
 575 }
 576
 577 // ----------------------------------------------------------------------------
 578 // wxComboBox
 579 // ----------------------------------------------------------------------------
 580
 581 void wxComboBox::Init()
 582 {
 583     m_lbox = (wxListBox *)NULL;
 584 }
 585
 586 bool wxComboBox::Create(wxWindow *parent,
 587                         wxWindowID id,
 588                         const wxString& value,
 589                         const wxPoint& pos,
 590                         const wxSize& size,
 591                         int n,
 592                         const wxString *choices,
 593                         long style,
 594                         const wxValidator& validator,
 595                         const wxString& name)
 596 {
 597     if ( !wxComboControl::Create(parent, id, value, pos, size, style,
 598                                  validator, name) )
 599     {
 600         return FALSE;
 601     }
 602
 603     wxComboListBox *combolbox =
 604         new wxComboListBox(this, style & wxCB_SORT ? wxLB_SORT : 0);
 605     m_lbox = combolbox;
 606     m_lbox->Set(n, choices);
 607
 608     SetPopupControl(combolbox);
 609
 610     return TRUE;
 611 }
 612
 613 wxComboBox::~wxComboBox()
 614 {
 615 }
 616
 617 // ----------------------------------------------------------------------------
 618 // wxComboBox methods forwarded to wxTextCtrl
 619 // ----------------------------------------------------------------------------
 620
 621 wxString wxComboBox::GetValue() const
 622 {
 623     return GetText()->GetValue();
 624 }
 625
 626 void wxComboBox::SetValue(const wxString& value)
 627 {
 628     GetText()->SetValue(value);
 629 }
 630
 631 void wxComboBox::Copy()
 632 {
 633     GetText()->Copy();
 634 }
 635
 636 void wxComboBox::Cut()
 637 {
 638     GetText()->Cut();
 639 }
 640
 641 void wxComboBox::Paste()
 642 {
 643     GetText()->Paste();
 644 }
 645
 646 void wxComboBox::SetInsertionPoint(long pos)
 647 {
 648     GetText()->SetInsertionPoint(pos);
 649 }
 650
 651 void wxComboBox::SetInsertionPointEnd()
 652 {
 653     GetText()->SetInsertionPointEnd();
 654 }
 655
 656 long wxComboBox::GetInsertionPoint() const
 657 {
 658     return GetText()->GetInsertionPoint();
 659 }
 660
 661 long wxComboBox::GetLastPosition() const
 662 {
 663     return GetText()->GetLastPosition();
 664 }
 665
 666 void wxComboBox::Replace(long from, long to, const wxString& value)
 667 {
 668     GetText()->Replace(from, to, value);
 669 }
 670
 671 void wxComboBox::Remove(long from, long to)
 672 {
 673     GetText()->Remove(from, to);
 674 }
 675
 676 void wxComboBox::SetSelection(long from, long to)
 677 {
 678     GetText()->SetSelection(from, to);
 679 }
 680
 681 void wxComboBox::SetEditable(bool editable)
 682 {
 683     GetText()->SetEditable(editable);
 684 }
 685
 686 // ----------------------------------------------------------------------------
 687 // wxComboBox methods forwarded to wxListBox
 688 // ----------------------------------------------------------------------------
 689
 690 void wxComboBox::Clear()
 691 {
 692     GetLBox()->Clear();
 693 }
 694
 695 void wxComboBox::Delete(int n)
 696 {
 697     GetLBox()->Delete(n);
 698 }
 699
 700 int wxComboBox::GetCount() const
 701 {
 702     return GetLBox()->GetCount();
 703 }
 704
 705 wxString wxComboBox::GetString(int n) const
 706 {
 707     return GetLBox()->GetString(n);
 708 }
 709
 710 void wxComboBox::SetString(int n, const wxString& s)
 711 {
 712     GetLBox()->SetString(n, s);
 713 }
 714
 715 int wxComboBox::FindString(const wxString& s) const
 716 {
 717     return GetLBox()->FindString(s);
 718 }
 719
 720 void wxComboBox::Select(int n)
 721 {
 722     wxCHECK_RET( (n >= 0) && (n < GetCount()), _T("invalid combobox index") );
 723
 724     GetLBox()->SetSelection(n);
 725     GetText()->SetValue(GetLBox()->GetString(n));
 726 }
 727
 728 int wxComboBox::GetSelection() const
 729 {
 730     // if the current value isn't one of the listbox strings, return -1
 731     return FindString(GetText()->GetValue());
 732 }
 733
 734 int wxComboBox::DoAppend(const wxString& item)
 735 {
 736     return GetLBox()->Append(item);
 737 }
 738
 739 void wxComboBox::DoSetItemClientData(int n, void* clientData)
 740 {
 741     GetLBox()->SetClientData(n, clientData);
 742 }
 743
 744 void *wxComboBox::DoGetItemClientData(int n) const
 745 {
 746     return GetLBox()->GetClientData(n);
 747 }
 748
 749 void wxComboBox::DoSetItemClientObject(int n, wxClientData* clientData)
 750 {
 751     GetLBox()->SetClientObject(n, clientData);
 752 }
 753
 754 wxClientData* wxComboBox::DoGetItemClientObject(int n) const
 755 {
 756     return GetLBox()->GetClientObject(n);
 757 }
 758
 759 // ----------------------------------------------------------------------------
 760 // input handling
 761 // ----------------------------------------------------------------------------
 762
 763 void wxComboControl::OnKey(wxCommandEvent& event)
 764 {
 765     if ( m_isPopupShown )
 766     {
 767         // pass it to the popped up control
 768         (void)m_popup->GetControl()->ProcessEvent(event);
 769     }
 770     else // no popup
 771     {
 772         event.Skip();
 773     }
 774 }
 775
 776 bool wxComboControl::PerformAction(const wxControlAction& action,
 777                                    long numArg,
 778                                    const wxString& strArg)
 779 {
 780     bool processed = FALSE;
 781     if ( action == wxACTION_COMBOBOX_POPUP )
 782     {
 783         if ( !m_isPopupShown )
 784         {
 785             ShowPopup();
 786
 787             processed = TRUE;
 788         }
 789     }
 790     else if ( action == wxACTION_COMBOBOX_DISMISS )
 791     {
 792         if ( m_isPopupShown )
 793         {
 794             HidePopup();
 795
 796             processed = TRUE;
 797         }
 798     }
 799
 800     if ( !processed )
 801     {
 802         // pass along
 803         return wxControl::PerformAction(action, numArg, strArg);
 804     }
 805
 806     return TRUE;
 807 }
 808
 809 // ----------------------------------------------------------------------------
 810 // wxStdComboBoxInputHandler
 811 // ----------------------------------------------------------------------------
 812
 813 wxStdComboBoxInputHandler::wxStdComboBoxInputHandler(wxInputHandler *inphand)
 814                          : wxStdInputHandler(inphand)
 815 {
 816 }
 817
 818 bool wxStdComboBoxInputHandler::HandleKey(wxControl *control,
 819                                           const wxKeyEvent& event,
 820                                           bool pressed)
 821 {
 822     if ( pressed )
 823     {
 824         wxControlAction action;
 825         switch ( event.GetKeyCode() )
 826         {
 827             case WXK_DOWN:
 828                 action = wxACTION_COMBOBOX_POPUP;
 829                 break;
 830
 831             case WXK_ESCAPE:
 832                 action = wxACTION_COMBOBOX_DISMISS;
 833                 break;
 834         }
 835
 836         if ( !!action )
 837         {
 838             control->PerformAction(action);
 839
 840             return TRUE;
 841         }
 842     }
 843
 844     return wxStdInputHandler::HandleKey(control, event, pressed);
 845 }
 846
 847 #endif // wxUSE_COMBOBOX