samples/widgets/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Program:     wxWidgets Widgets Sample
   3 // Name:        combobox.cpp
   4 // Purpose:     Part of the widgets sample showing wxComboBox
   5 // Author:      Vadim Zeitlin
   6 // Created:     27.03.01
   7 // Id:          $Id$
   8 // Copyright:   (c) 2001 Vadim Zeitlin
   9 // License:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // for compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #if wxUSE_COMBOBOX
  28
  29 // for all others, include the necessary headers
  30 #ifndef WX_PRECOMP
  31     #include "wx/log.h"
  32
  33     #include "wx/bitmap.h"
  34     #include "wx/button.h"
  35     #include "wx/checkbox.h"
  36     #include "wx/combobox.h"
  37     #include "wx/radiobox.h"
  38     #include "wx/statbox.h"
  39     #include "wx/textctrl.h"
  40 #endif
  41
  42 #include "wx/sizer.h"
  43
  44 #include "itemcontainer.h"
  45 #include "widgets.h"
  46 #if 1
  47 #include "icons/combobox.xpm"
  48
  49 // ----------------------------------------------------------------------------
  50 // constants
  51 // ----------------------------------------------------------------------------
  52
  53 // control ids
  54 enum
  55 {
  56     ComboPage_Reset = wxID_HIGHEST,
  57     ComboPage_SetCurrent,
  58     ComboPage_CurText,
  59     ComboPage_InsertionPointText,
  60     ComboPage_Insert,
  61     ComboPage_InsertText,
  62     ComboPage_Add,
  63     ComboPage_AddText,
  64     ComboPage_AddSeveral,
  65     ComboPage_AddMany,
  66     ComboPage_Clear,
  67     ComboPage_Change,
  68     ComboPage_ChangeText,
  69     ComboPage_Delete,
  70     ComboPage_DeleteText,
  71     ComboPage_DeleteSel,
  72     ComboPage_SetValue,
  73     ComboPage_SetValueText,
  74     ComboPage_Combo,
  75     ComboPage_ContainerTests
  76 };
  77
  78 // kinds of comboboxes
  79 enum
  80 {
  81     ComboKind_Default,
  82     ComboKind_Simple,
  83     ComboKind_DropDown
  84 };
  85
  86 // ----------------------------------------------------------------------------
  87 // ComboboxWidgetsPage
  88 // ----------------------------------------------------------------------------
  89
  90 class ComboboxWidgetsPage : public ItemContainerWidgetsPage
  91 {
  92 public:
  93     ComboboxWidgetsPage(WidgetsBookCtrl *book, wxImageList *imaglist);
  94
  95     virtual wxControl *GetWidget() const { return m_combobox; }
  96     virtual wxTextEntryBase *GetTextEntry() const { return m_combobox; }
  97     virtual wxItemContainer* GetContainer() const { return m_combobox; }
  98     virtual void RecreateWidget() { CreateCombo(); }
  99
 100     // lazy creation of the content
 101     virtual void CreateContent();
 102
 103 protected:
 104     // event handlers
 105     void OnButtonReset(wxCommandEvent& event);
 106     void OnButtonChange(wxCommandEvent& event);
 107     void OnButtonDelete(wxCommandEvent& event);
 108     void OnButtonDeleteSel(wxCommandEvent& event);
 109     void OnButtonClear(wxCommandEvent& event);
 110     void OnButtonInsert(wxCommandEvent &event);
 111     void OnButtonAdd(wxCommandEvent& event);
 112     void OnButtonAddSeveral(wxCommandEvent& event);
 113     void OnButtonAddMany(wxCommandEvent& event);
 114     void OnButtonSetValue(wxCommandEvent& event);
 115     void OnButtonSetCurrent(wxCommandEvent& event);
 116
 117     void OnDropdown(wxCommandEvent& event);
 118     void OnCloseup(wxCommandEvent& event);
 119     void OnComboBox(wxCommandEvent& event);
 120     void OnComboText(wxCommandEvent& event);
 121
 122     void OnCheckOrRadioBox(wxCommandEvent& event);
 123
 124     void OnUpdateUIInsertionPointText(wxUpdateUIEvent& event);
 125
 126     void OnUpdateUIInsert(wxUpdateUIEvent& event);
 127     void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
 128     void OnUpdateUIClearButton(wxUpdateUIEvent& event);
 129     void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
 130     void OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event);
 131     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 132     void OnUpdateUISetCurrent(wxUpdateUIEvent& event);
 133
 134     // reset the combobox parameters
 135     void Reset();
 136
 137     // (re)create the combobox
 138     void CreateCombo();
 139
 140     // the controls
 141     // ------------
 142
 143     // the sel mode radiobox
 144     wxRadioBox *m_radioKind;
 145
 146     // the checkboxes for styles
 147     wxCheckBox *m_chkSort,
 148                *m_chkReadonly,
 149                *m_chkFilename;
 150
 151     // the combobox itself and the sizer it is in
 152     wxComboBox *m_combobox;
 153     wxSizer *m_sizerCombo;
 154
 155     // the text entries for "Add/change string" and "Delete" buttons
 156     wxTextCtrl *m_textInsert,
 157                *m_textAdd,
 158                *m_textChange,
 159                *m_textSetValue,
 160                *m_textDelete,
 161                *m_textCur;
 162
 163 private:
 164     DECLARE_EVENT_TABLE()
 165     DECLARE_WIDGETS_PAGE(ComboboxWidgetsPage)
 166 };
 167
 168 // ----------------------------------------------------------------------------
 169 // event tables
 170 // ----------------------------------------------------------------------------
 171
 172 BEGIN_EVENT_TABLE(ComboboxWidgetsPage, WidgetsPage)
 173     EVT_BUTTON(ComboPage_Reset, ComboboxWidgetsPage::OnButtonReset)
 174     EVT_BUTTON(ComboPage_Change, ComboboxWidgetsPage::OnButtonChange)
 175     EVT_BUTTON(ComboPage_Delete, ComboboxWidgetsPage::OnButtonDelete)
 176     EVT_BUTTON(ComboPage_DeleteSel, ComboboxWidgetsPage::OnButtonDeleteSel)
 177     EVT_BUTTON(ComboPage_Clear, ComboboxWidgetsPage::OnButtonClear)
 178     EVT_BUTTON(ComboPage_Insert, ComboboxWidgetsPage::OnButtonInsert)
 179     EVT_BUTTON(ComboPage_Add, ComboboxWidgetsPage::OnButtonAdd)
 180     EVT_BUTTON(ComboPage_AddSeveral, ComboboxWidgetsPage::OnButtonAddSeveral)
 181     EVT_BUTTON(ComboPage_AddMany, ComboboxWidgetsPage::OnButtonAddMany)
 182     EVT_BUTTON(ComboPage_SetValue, ComboboxWidgetsPage::OnButtonSetValue)
 183     EVT_BUTTON(ComboPage_SetCurrent, ComboboxWidgetsPage::OnButtonSetCurrent)
 184     EVT_BUTTON(ComboPage_ContainerTests, ItemContainerWidgetsPage::OnButtonTestItemContainer)
 185
 186     EVT_TEXT_ENTER(ComboPage_InsertText, ComboboxWidgetsPage::OnButtonInsert)
 187     EVT_TEXT_ENTER(ComboPage_AddText, ComboboxWidgetsPage::OnButtonAdd)
 188     EVT_TEXT_ENTER(ComboPage_DeleteText, ComboboxWidgetsPage::OnButtonDelete)
 189
 190     EVT_UPDATE_UI(ComboPage_InsertionPointText, ComboboxWidgetsPage::OnUpdateUIInsertionPointText)
 191
 192     EVT_UPDATE_UI(ComboPage_Reset, ComboboxWidgetsPage::OnUpdateUIResetButton)
 193     EVT_UPDATE_UI(ComboPage_Insert, ComboboxWidgetsPage::OnUpdateUIInsert)
 194     EVT_UPDATE_UI(ComboPage_AddSeveral, ComboboxWidgetsPage::OnUpdateUIAddSeveral)
 195     EVT_UPDATE_UI(ComboPage_Clear, ComboboxWidgetsPage::OnUpdateUIClearButton)
 196     EVT_UPDATE_UI(ComboPage_DeleteText, ComboboxWidgetsPage::OnUpdateUIClearButton)
 197     EVT_UPDATE_UI(ComboPage_Delete, ComboboxWidgetsPage::OnUpdateUIDeleteButton)
 198     EVT_UPDATE_UI(ComboPage_Change, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 199     EVT_UPDATE_UI(ComboPage_ChangeText, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 200     EVT_UPDATE_UI(ComboPage_DeleteSel, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 201     EVT_UPDATE_UI(ComboPage_SetCurrent, ComboboxWidgetsPage::OnUpdateUISetCurrent)
 202
 203     EVT_COMBOBOX(ComboPage_Combo, ComboboxWidgetsPage::OnComboBox)
 204     EVT_COMBOBOX_DROPDOWN(ComboPage_Combo, ComboboxWidgetsPage::OnDropdown)
 205     EVT_COMBOBOX_CLOSEUP(ComboPage_Combo, ComboboxWidgetsPage::OnCloseup)
 206     EVT_TEXT(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 207     EVT_TEXT_ENTER(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 208
 209     EVT_CHECKBOX(wxID_ANY, ComboboxWidgetsPage::OnCheckOrRadioBox)
 210     EVT_RADIOBOX(wxID_ANY, ComboboxWidgetsPage::OnCheckOrRadioBox)
 211 END_EVENT_TABLE()
 212
 213 // ============================================================================
 214 // implementation
 215 // ============================================================================
 216
 217 #if defined(__WXUNIVERSAL__)
 218     #define FAMILY_CTRLS UNIVERSAL_CTRLS
 219 #else
 220     #define FAMILY_CTRLS NATIVE_CTRLS
 221 #endif
 222
 223 IMPLEMENT_WIDGETS_PAGE(ComboboxWidgetsPage, _T("Combobox"),
 224                        FAMILY_CTRLS | WITH_ITEMS_CTRLS | COMBO_CTRLS
 225                        );
 226
 227 ComboboxWidgetsPage::ComboboxWidgetsPage(WidgetsBookCtrl *book,
 228                                          wxImageList *imaglist)
 229                   : ItemContainerWidgetsPage(book, imaglist, combobox_xpm)
 230 {
 231     // init everything
 232     m_chkSort =
 233     m_chkReadonly =
 234     m_chkFilename = (wxCheckBox *)NULL;
 235
 236     m_combobox = (wxComboBox *)NULL;
 237     m_sizerCombo = (wxSizer *)NULL;
 238 }
 239
 240 void ComboboxWidgetsPage::CreateContent()
 241 {
 242     /*
 243        What we create here is a frame having 3 panes: style pane is the
 244        leftmost one, in the middle the pane with buttons allowing to perform
 245        miscellaneous combobox operations and the pane containing the combobox
 246        itself to the right
 247     */
 248     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 249
 250     // left pane
 251     wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
 252
 253     // should be in sync with ComboKind_XXX values
 254     static const wxString kinds[] =
 255     {
 256         _T("default"),
 257         _T("simple"),
 258         _T("drop down"),
 259     };
 260
 261     m_radioKind = new wxRadioBox(this, wxID_ANY, _T("Combobox &kind:"),
 262                                  wxDefaultPosition, wxDefaultSize,
 263                                  WXSIZEOF(kinds), kinds,
 264                                  1, wxRA_SPECIFY_COLS);
 265
 266     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 267
 268     m_chkSort = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Sort items"));
 269     m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Read only"));
 270     m_chkFilename = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&File name"));
 271     m_chkFilename->Disable(); // not implemented yet
 272
 273     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 274     sizerLeft->Add(m_radioKind, 0, wxGROW | wxALL, 5);
 275
 276     wxButton *btn = new wxButton(this, ComboPage_Reset, _T("&Reset"));
 277     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 278
 279     // middle pane
 280     wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY,
 281         _T("&Change combobox contents"));
 282     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 283
 284     wxSizer *sizerRow;
 285
 286     sizerRow = CreateSizerWithTextAndButton(ComboPage_SetCurrent,
 287                                             _T("Current &selection"),
 288                                             ComboPage_CurText,
 289                                             &m_textCur);
 290
 291     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 292
 293     wxTextCtrl *text;
 294     sizerRow = CreateSizerWithTextAndLabel(_T("Insertion Point"),
 295                                            ComboPage_InsertionPointText,
 296                                            &text);
 297     text->SetEditable(false);
 298
 299     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 300
 301     sizerRow = CreateSizerWithTextAndButton(ComboPage_Insert,
 302                                             _T("&Insert this string"),
 303                                             ComboPage_InsertText,
 304                                             &m_textInsert);
 305     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 306
 307     sizerRow = CreateSizerWithTextAndButton(ComboPage_Add,
 308                                             _T("&Add this string"),
 309                                             ComboPage_AddText,
 310                                             &m_textAdd);
 311     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 312
 313     btn = new wxButton(this, ComboPage_AddSeveral, _T("&Append a few strings"));
 314     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 315
 316     btn = new wxButton(this, ComboPage_AddMany, _T("Append &many strings"));
 317     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 318
 319     sizerRow = CreateSizerWithTextAndButton(ComboPage_Change,
 320                                             _T("C&hange current"),
 321                                             ComboPage_ChangeText,
 322                                             &m_textChange);
 323     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 324
 325     sizerRow = CreateSizerWithTextAndButton(ComboPage_Delete,
 326                                             _T("&Delete this item"),
 327                                             ComboPage_DeleteText,
 328                                             &m_textDelete);
 329     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 330
 331     btn = new wxButton(this, ComboPage_DeleteSel, _T("Delete &selection"));
 332     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 333
 334     btn = new wxButton(this, ComboPage_Clear, _T("&Clear"));
 335     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 336
 337     sizerRow = CreateSizerWithTextAndButton(ComboPage_SetValue,
 338                                             _T("SetValue"),
 339                                             ComboPage_SetValueText,
 340                                             &m_textSetValue);
 341     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 342
 343     btn = new wxButton(this, ComboPage_ContainerTests, _T("Run &tests"));
 344     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 345
 346
 347
 348     // right pane
 349     wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
 350     m_combobox = new wxComboBox(this, ComboPage_Combo, wxEmptyString,
 351                                 wxDefaultPosition, wxDefaultSize,
 352                                 0, NULL,
 353                                 0);
 354     sizerRight->Add(m_combobox, 0, wxGROW | wxALL, 5);
 355     sizerRight->SetMinSize(150, 0);
 356     m_sizerCombo = sizerRight; // save it to modify it later
 357
 358     // the 3 panes panes compose the window
 359     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 360     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 361     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 362
 363     // final initializations
 364     Reset();
 365
 366     SetSizer(sizerTop);
 367 }
 368
 369 // ----------------------------------------------------------------------------
 370 // operations
 371 // ----------------------------------------------------------------------------
 372
 373 void ComboboxWidgetsPage::Reset()
 374 {
 375     m_chkSort->SetValue(false);
 376     m_chkReadonly->SetValue(false);
 377     m_chkFilename->SetValue(false);
 378 }
 379
 380 void ComboboxWidgetsPage::CreateCombo()
 381 {
 382     int flags = ms_defaultFlags;
 383
 384     if ( m_chkSort->GetValue() )
 385         flags |= wxCB_SORT;
 386     if ( m_chkReadonly->GetValue() )
 387         flags |= wxCB_READONLY;
 388
 389     switch ( m_radioKind->GetSelection() )
 390     {
 391         default:
 392             wxFAIL_MSG( _T("unknown combo kind") );
 393             // fall through
 394
 395         case ComboKind_Default:
 396             break;
 397
 398         case ComboKind_Simple:
 399             flags |= wxCB_SIMPLE;
 400             break;
 401
 402         case ComboKind_DropDown:
 403             flags = wxCB_DROPDOWN;
 404             break;
 405     }
 406
 407     wxArrayString items;
 408     if ( m_combobox )
 409     {
 410         unsigned int count = m_combobox->GetCount();
 411         for ( unsigned int n = 0; n < count; n++ )
 412         {
 413             items.Add(m_combobox->GetString(n));
 414         }
 415
 416         m_sizerCombo->Detach( m_combobox );
 417         delete m_combobox;
 418     }
 419
 420     m_combobox = new wxComboBox(this, ComboPage_Combo, wxEmptyString,
 421                                 wxDefaultPosition, wxDefaultSize,
 422                                 0, NULL,
 423                                 flags);
 424
 425 #if 0
 426     if ( m_chkFilename->GetValue() )
 427         ;
 428 #endif // TODO
 429
 430     unsigned int count = items.GetCount();
 431     for ( unsigned int n = 0; n < count; n++ )
 432     {
 433         m_combobox->Append(items[n]);
 434     }
 435
 436     m_sizerCombo->Add(m_combobox, 0, wxGROW | wxALL, 5);
 437     m_sizerCombo->Layout();
 438 }
 439
 440 // ----------------------------------------------------------------------------
 441 // event handlers
 442 // ----------------------------------------------------------------------------
 443
 444 void ComboboxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 445 {
 446     Reset();
 447
 448     CreateCombo();
 449 }
 450
 451 void ComboboxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
 452 {
 453     int sel = m_combobox->GetSelection();
 454     if ( sel != wxNOT_FOUND )
 455     {
 456 #ifndef __WXGTK__
 457         m_combobox->SetString(sel, m_textChange->GetValue());
 458 #else
 459         wxLogMessage(_T("Not implemented in wxGTK"));
 460 #endif
 461     }
 462 }
 463
 464 void ComboboxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
 465 {
 466     unsigned long n;
 467     if ( !m_textDelete->GetValue().ToULong(&n) ||
 468             (n >= m_combobox->GetCount()) )
 469     {
 470         return;
 471     }
 472
 473     m_combobox->Delete(n);
 474 }
 475
 476 void ComboboxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
 477 {
 478     int sel = m_combobox->GetSelection();
 479     if ( sel != wxNOT_FOUND )
 480     {
 481         m_combobox->Delete(sel);
 482     }
 483 }
 484
 485 void ComboboxWidgetsPage::OnButtonSetValue(wxCommandEvent& WXUNUSED(event))
 486 {
 487     wxString value = m_textSetValue->GetValue();
 488     m_combobox->SetValue( value );
 489 }
 490
 491 void ComboboxWidgetsPage::OnButtonClear(wxCommandEvent& WXUNUSED(event))
 492 {
 493     m_combobox->Clear();
 494 }
 495
 496 void ComboboxWidgetsPage::OnButtonInsert(wxCommandEvent& WXUNUSED(event))
 497 {
 498     static unsigned int s_item = 0;
 499
 500     wxString s = m_textInsert->GetValue();
 501     if ( !m_textInsert->IsModified() )
 502     {
 503         // update the default string
 504         m_textInsert->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 505     }
 506
 507     if (m_combobox->GetSelection() >= 0)
 508         m_combobox->Insert(s, m_combobox->GetSelection());
 509 }
 510
 511 void ComboboxWidgetsPage::OnButtonAdd(wxCommandEvent& WXUNUSED(event))
 512 {
 513     static unsigned int s_item = 0;
 514
 515     wxString s = m_textAdd->GetValue();
 516     if ( !m_textAdd->IsModified() )
 517     {
 518         // update the default string
 519         m_textAdd->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 520     }
 521
 522     m_combobox->Append(s);
 523 }
 524
 525 void ComboboxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
 526 {
 527     // "many" means 1000 here
 528     for ( unsigned int n = 0; n < 1000; n++ )
 529     {
 530         m_combobox->Append(wxString::Format(_T("item #%u"), n));
 531     }
 532 }
 533
 534 void ComboboxWidgetsPage::OnButtonSetCurrent(wxCommandEvent& WXUNUSED(event))
 535 {
 536     long n;
 537     if ( !m_textCur->GetValue().ToLong(&n) )
 538         return;
 539
 540     m_combobox->SetSelection(n);
 541 }
 542
 543 void ComboboxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& WXUNUSED(event))
 544 {
 545     m_combobox->Append(_T("First"));
 546     m_combobox->Append(_T("another one"));
 547     m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
 548 }
 549
 550 void ComboboxWidgetsPage::OnUpdateUIInsertionPointText(wxUpdateUIEvent& event)
 551 {
 552     if (m_combobox)
 553         event.SetText( wxString::Format(_T("%ld"), m_combobox->GetInsertionPoint()) );
 554 }
 555
 556 void ComboboxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 557 {
 558     event.Enable( m_chkSort->GetValue() ||
 559                     m_chkReadonly->GetValue() ||
 560                         m_chkFilename->GetValue() );
 561 }
 562
 563 void ComboboxWidgetsPage::OnUpdateUIInsert(wxUpdateUIEvent& event)
 564 {
 565     if (m_combobox)
 566     {
 567         bool enable = !(m_combobox->GetWindowStyle() & wxCB_SORT) &&
 568                        (m_combobox->GetSelection() >= 0);
 569
 570         event.Enable(enable);
 571     }
 572 }
 573
 574 void ComboboxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
 575 {
 576     if (m_combobox)
 577     {
 578       unsigned long n;
 579       event.Enable(m_textDelete->GetValue().ToULong(&n) &&
 580         (n < (unsigned)m_combobox->GetCount()));
 581     }
 582 }
 583
 584 void ComboboxWidgetsPage::OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event)
 585 {
 586     if (m_combobox)
 587         event.Enable(m_combobox->GetSelection() != wxNOT_FOUND);
 588 }
 589
 590 void ComboboxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
 591 {
 592     if (m_combobox)
 593         event.Enable(m_combobox->GetCount() != 0);
 594 }
 595
 596 void ComboboxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
 597 {
 598     if (m_combobox)
 599         event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 600 }
 601
 602 void ComboboxWidgetsPage::OnUpdateUISetCurrent(wxUpdateUIEvent& event)
 603 {
 604     long n;
 605     event.Enable( m_textCur->GetValue().ToLong(&n) &&
 606                     (n == wxNOT_FOUND ||
 607                         (n >= 0 && (unsigned)n < m_combobox->GetCount())) );
 608 }
 609
 610 void ComboboxWidgetsPage::OnComboText(wxCommandEvent& event)
 611 {
 612     if (!m_combobox)
 613         return;
 614
 615     wxString s = event.GetString();
 616
 617     wxASSERT_MSG( s == m_combobox->GetValue(),
 618                   _T("event and combobox values should be the same") );
 619
 620     if (event.GetEventType() == wxEVT_COMMAND_TEXT_ENTER)
 621         wxLogMessage(_T("Combobox enter pressed (now '%s')"), s.c_str());
 622     else
 623         wxLogMessage(_T("Combobox text changed (now '%s')"), s.c_str());
 624 }
 625
 626 void ComboboxWidgetsPage::OnComboBox(wxCommandEvent& event)
 627 {
 628     long sel = event.GetInt();
 629     const wxString selstr = wxString::Format(_T("%ld"), sel);
 630     m_textDelete->SetValue(selstr);
 631     m_textCur->SetValue(selstr);
 632
 633     wxLogMessage(_T("Combobox item %ld selected"), sel);
 634
 635     wxLogMessage(_T("Combobox GetValue(): %s"), m_combobox->GetValue().c_str() );
 636 }
 637
 638 void ComboboxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
 639 {
 640     CreateCombo();
 641 }
 642
 643 void ComboboxWidgetsPage::OnDropdown(wxCommandEvent& WXUNUSED(event))
 644 {
 645     wxLogMessage(_T("Combobox dropped down"));
 646 }
 647
 648 void ComboboxWidgetsPage::OnCloseup(wxCommandEvent& WXUNUSED(event))
 649 {
 650     wxLogMessage(_T("Combobox closed up"));
 651 }
 652
 653 #endif //wxUSE_COMBOBOX
 654
 655 #endif