samples/widgets/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Program:     wxWindows 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/button.h"
  34     #include "wx/checkbox.h"
  35     #include "wx/combobox.h"
  36     #include "wx/radiobox.h"
  37     #include "wx/statbox.h"
  38     #include "wx/textctrl.h"
  39 #endif
  40
  41 #include "wx/sizer.h"
  42
  43 #include "widgets.h"
  44
  45 #include "icons/combobox.xpm"
  46
  47 // ----------------------------------------------------------------------------
  48 // constants
  49 // ----------------------------------------------------------------------------
  50
  51 // control ids
  52 enum
  53 {
  54     ComboPage_Reset = 100,
  55     ComboPage_CurText,
  56     ComboPage_Add,
  57     ComboPage_AddText,
  58     ComboPage_AddSeveral,
  59     ComboPage_AddMany,
  60     ComboPage_Clear,
  61     ComboPage_Change,
  62     ComboPage_ChangeText,
  63     ComboPage_Delete,
  64     ComboPage_DeleteText,
  65     ComboPage_DeleteSel,
  66     ComboPage_Combo
  67 };
  68
  69 // kinds of comboboxes
  70 enum
  71 {
  72     ComboKind_Default,
  73     ComboKind_Simple,
  74     ComboKind_DropDown
  75 };
  76
  77 // ----------------------------------------------------------------------------
  78 // ComboboxWidgetsPage
  79 // ----------------------------------------------------------------------------
  80
  81 class ComboboxWidgetsPage : public WidgetsPage
  82 {
  83 public:
  84     ComboboxWidgetsPage(wxNotebook *notebook, wxImageList *imaglist);
  85
  86 protected:
  87     // event handlers
  88     void OnButtonReset(wxCommandEvent& event);
  89     void OnButtonChange(wxCommandEvent& event);
  90     void OnButtonDelete(wxCommandEvent& event);
  91     void OnButtonDeleteSel(wxCommandEvent& event);
  92     void OnButtonClear(wxCommandEvent& event);
  93     void OnButtonAdd(wxCommandEvent& event);
  94     void OnButtonAddSeveral(wxCommandEvent& event);
  95     void OnButtonAddMany(wxCommandEvent& event);
  96
  97     void OnComboBox(wxCommandEvent& event);
  98     void OnComboText(wxCommandEvent& event);
  99
 100     void OnCheckOrRadioBox(wxCommandEvent& event);
 101
 102     void OnUpdateUICurText(wxUpdateUIEvent& event);
 103
 104     void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
 105     void OnUpdateUIClearButton(wxUpdateUIEvent& event);
 106     void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
 107     void OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event);
 108     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 109
 110     // reset the combobox parameters
 111     void Reset();
 112
 113     // (re)create the combobox
 114     void CreateCombo();
 115
 116     // the controls
 117     // ------------
 118
 119     // the sel mode radiobox
 120     wxRadioBox *m_radioKind;
 121
 122     // the checkboxes for styles
 123     wxCheckBox *m_chkSort,
 124                *m_chkReadonly;
 125
 126     // the combobox itself and the sizer it is in
 127     wxComboBox *m_combobox;
 128     wxSizer *m_sizerCombo;
 129
 130     // the text entries for "Add/change string" and "Delete" buttons
 131     wxTextCtrl *m_textAdd,
 132                *m_textChange,
 133                *m_textDelete;
 134
 135 private:
 136     DECLARE_EVENT_TABLE()
 137     DECLARE_WIDGETS_PAGE(ComboboxWidgetsPage)
 138 };
 139
 140 // ----------------------------------------------------------------------------
 141 // event tables
 142 // ----------------------------------------------------------------------------
 143
 144 BEGIN_EVENT_TABLE(ComboboxWidgetsPage, WidgetsPage)
 145     EVT_BUTTON(ComboPage_Reset, ComboboxWidgetsPage::OnButtonReset)
 146     EVT_BUTTON(ComboPage_Change, ComboboxWidgetsPage::OnButtonChange)
 147     EVT_BUTTON(ComboPage_Delete, ComboboxWidgetsPage::OnButtonDelete)
 148     EVT_BUTTON(ComboPage_DeleteSel, ComboboxWidgetsPage::OnButtonDeleteSel)
 149     EVT_BUTTON(ComboPage_Clear, ComboboxWidgetsPage::OnButtonClear)
 150     EVT_BUTTON(ComboPage_Add, ComboboxWidgetsPage::OnButtonAdd)
 151     EVT_BUTTON(ComboPage_AddSeveral, ComboboxWidgetsPage::OnButtonAddSeveral)
 152     EVT_BUTTON(ComboPage_AddMany, ComboboxWidgetsPage::OnButtonAddMany)
 153
 154     EVT_TEXT_ENTER(ComboPage_AddText, ComboboxWidgetsPage::OnButtonAdd)
 155     EVT_TEXT_ENTER(ComboPage_DeleteText, ComboboxWidgetsPage::OnButtonDelete)
 156
 157     EVT_UPDATE_UI(ComboPage_CurText, ComboboxWidgetsPage::OnUpdateUICurText)
 158
 159     EVT_UPDATE_UI(ComboPage_Reset, ComboboxWidgetsPage::OnUpdateUIResetButton)
 160     EVT_UPDATE_UI(ComboPage_AddSeveral, ComboboxWidgetsPage::OnUpdateUIAddSeveral)
 161     EVT_UPDATE_UI(ComboPage_Clear, ComboboxWidgetsPage::OnUpdateUIClearButton)
 162     EVT_UPDATE_UI(ComboPage_DeleteText, ComboboxWidgetsPage::OnUpdateUIClearButton)
 163     EVT_UPDATE_UI(ComboPage_Delete, ComboboxWidgetsPage::OnUpdateUIDeleteButton)
 164     EVT_UPDATE_UI(ComboPage_Change, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 165     EVT_UPDATE_UI(ComboPage_ChangeText, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 166     EVT_UPDATE_UI(ComboPage_DeleteSel, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 167
 168     EVT_COMBOBOX(ComboPage_Combo, ComboboxWidgetsPage::OnComboBox)
 169     EVT_TEXT(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 170
 171     EVT_CHECKBOX(-1, ComboboxWidgetsPage::OnCheckOrRadioBox)
 172     EVT_RADIOBOX(-1, ComboboxWidgetsPage::OnCheckOrRadioBox)
 173 END_EVENT_TABLE()
 174
 175 // ============================================================================
 176 // implementation
 177 // ============================================================================
 178
 179 IMPLEMENT_WIDGETS_PAGE(ComboboxWidgetsPage, _T("Combobox"));
 180
 181 ComboboxWidgetsPage::ComboboxWidgetsPage(wxNotebook *notebook,
 182                                        wxImageList *imaglist)
 183                   : WidgetsPage(notebook)
 184 {
 185     // init everything
 186     m_chkSort =
 187     m_chkReadonly = (wxCheckBox *)NULL;
 188
 189     m_combobox = (wxComboBox *)NULL;
 190     m_sizerCombo = (wxSizer *)NULL;
 191
 192     imaglist->Add(wxBitmap(combobox_xpm));
 193
 194     /*
 195        What we create here is a frame having 3 panes: style pane is the
 196        leftmost one, in the middle the pane with buttons allowing to perform
 197        miscellaneous combobox operations and the pane containing the combobox
 198        itself to the right
 199     */
 200     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 201
 202     // left pane
 203     wxStaticBox *box = new wxStaticBox(this, -1, _T("&Set style"));
 204
 205     // should be in sync with ComboKind_XXX values
 206     static const wxString kinds[] =
 207     {
 208         _T("default"),
 209         _T("simple"),
 210         _T("drop down"),
 211     };
 212
 213     m_radioKind = new wxRadioBox(this, -1, _T("Combobox &kind:"),
 214                                  wxDefaultPosition, wxDefaultSize,
 215                                  WXSIZEOF(kinds), kinds,
 216                                  1, wxRA_SPECIFY_COLS);
 217
 218     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 219
 220     m_chkSort = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Sort items"));
 221     m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Read only"));
 222
 223     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 224     sizerLeft->Add(m_radioKind, 0, wxGROW | wxALL, 5);
 225
 226     wxButton *btn = new wxButton(this, ComboPage_Reset, _T("&Reset"));
 227     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 228
 229     // middle pane
 230     wxStaticBox *box2 = new wxStaticBox(this, -1, _T("&Change combobox contents"));
 231     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 232
 233     wxSizer *sizerRow;
 234
 235     wxTextCtrl *text;
 236     sizerRow = CreateSizerWithTextAndLabel(_T("Current selection"),
 237                                            ComboPage_CurText,
 238                                            &text);
 239     text->SetEditable(FALSE);
 240
 241     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 242
 243     sizerRow = CreateSizerWithTextAndButton(ComboPage_Add,
 244                                             _T("&Add this string"),
 245                                             ComboPage_AddText,
 246                                             &m_textAdd);
 247     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 248
 249     btn = new wxButton(this, ComboPage_AddSeveral, _T("&Insert a few strings"));
 250     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 251
 252     btn = new wxButton(this, ComboPage_AddMany, _T("Add &many strings"));
 253     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 254
 255     sizerRow = CreateSizerWithTextAndButton(ComboPage_Change,
 256                                             _T("C&hange current"),
 257                                             ComboPage_ChangeText,
 258                                             &m_textChange);
 259     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 260
 261     sizerRow = CreateSizerWithTextAndButton(ComboPage_Delete,
 262                                             _T("&Delete this item"),
 263                                             ComboPage_DeleteText,
 264                                             &m_textDelete);
 265     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 266
 267     btn = new wxButton(this, ComboPage_DeleteSel, _T("Delete &selection"));
 268     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 269
 270     btn = new wxButton(this, ComboPage_Clear, _T("&Clear"));
 271     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 272
 273     // right pane
 274     wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
 275     m_combobox = new wxComboBox(this, ComboPage_Combo, _T(""),
 276                                 wxDefaultPosition, wxDefaultSize,
 277                                 0, NULL,
 278                                 0);
 279     sizerRight->Add(m_combobox, 1, wxGROW | wxALL, 5);
 280     sizerRight->SetMinSize(250, 0);
 281     m_sizerCombo = sizerRight; // save it to modify it later
 282
 283     // the 3 panes panes compose the window
 284     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 285     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 286     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 287
 288     // final initializations
 289     Reset();
 290
 291     SetAutoLayout(TRUE);
 292     SetSizer(sizerTop);
 293
 294     sizerTop->Fit(this);
 295 }
 296
 297 // ----------------------------------------------------------------------------
 298 // operations
 299 // ----------------------------------------------------------------------------
 300
 301 void ComboboxWidgetsPage::Reset()
 302 {
 303     m_chkSort->SetValue(FALSE);
 304     m_chkReadonly->SetValue(FALSE);
 305 }
 306
 307 void ComboboxWidgetsPage::CreateCombo()
 308 {
 309     int flags = 0;
 310
 311     if ( m_chkSort->GetValue() )
 312         flags |= wxCB_SORT;
 313     if ( m_chkReadonly->GetValue() )
 314         flags |= wxCB_READONLY;
 315
 316     switch ( m_radioKind->GetSelection() )
 317     {
 318         default:
 319             wxFAIL_MSG( _T("unknown combo kind") );
 320             // fall through
 321
 322         case ComboKind_Default:
 323             break;
 324
 325         case ComboKind_Simple:
 326             flags |= wxCB_SIMPLE;
 327             break;
 328
 329         case ComboKind_DropDown:
 330             flags = wxCB_DROPDOWN;
 331             break;
 332     }
 333
 334     wxArrayString items;
 335     if ( m_combobox )
 336     {
 337         int count = m_combobox->GetCount();
 338         for ( int n = 0; n < count; n++ )
 339         {
 340             items.Add(m_combobox->GetString(n));
 341         }
 342
 343         m_sizerCombo->Remove(m_combobox);
 344         delete m_combobox;
 345     }
 346
 347     m_combobox = new wxComboBox(this, ComboPage_Combo, _T(""),
 348                                 wxDefaultPosition, wxDefaultSize,
 349                                 0, NULL,
 350                                 flags);
 351
 352     size_t count = items.GetCount();
 353     for ( size_t n = 0; n < count; n++ )
 354     {
 355         m_combobox->Append(items[n]);
 356     }
 357
 358     m_sizerCombo->Add(m_combobox, 1, wxGROW | wxALL, 5);
 359     m_sizerCombo->Layout();
 360 }
 361
 362 // ----------------------------------------------------------------------------
 363 // event handlers
 364 // ----------------------------------------------------------------------------
 365
 366 void ComboboxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 367 {
 368     Reset();
 369
 370     CreateCombo();
 371 }
 372
 373 void ComboboxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
 374 {
 375     int sel = m_combobox->GetSelection();
 376     if ( sel != -1 )
 377     {
 378 #ifndef __WXGTK__
 379         m_combobox->SetString(sel, m_textChange->GetValue());
 380 #else
 381         wxLogMessage(_T("Not implemented in wxGTK"));
 382 #endif
 383     }
 384 }
 385
 386 void ComboboxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
 387 {
 388     unsigned long n;
 389     if ( !m_textDelete->GetValue().ToULong(&n) ||
 390             (n >= (unsigned)m_combobox->GetCount()) )
 391     {
 392         return;
 393     }
 394
 395     m_combobox->Delete(n);
 396 }
 397
 398 void ComboboxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
 399 {
 400     int sel = m_combobox->GetSelection();
 401     if ( sel != -1 )
 402     {
 403         m_combobox->Delete(sel);
 404     }
 405 }
 406
 407 void ComboboxWidgetsPage::OnButtonClear(wxCommandEvent& event)
 408 {
 409     m_combobox->Clear();
 410 }
 411
 412 void ComboboxWidgetsPage::OnButtonAdd(wxCommandEvent& event)
 413 {
 414     static size_t s_item = 0;
 415
 416     wxString s = m_textAdd->GetValue();
 417     if ( !m_textAdd->IsModified() )
 418     {
 419         // update the default string
 420         m_textAdd->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 421     }
 422
 423     m_combobox->Append(s);
 424 }
 425
 426 void ComboboxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
 427 {
 428     // "many" means 1000 here
 429     for ( size_t n = 0; n < 1000; n++ )
 430     {
 431         m_combobox->Append(wxString::Format(_T("item #%u"), n));
 432     }
 433 }
 434
 435 void ComboboxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& event)
 436 {
 437     m_combobox->Append(_T("First"));
 438     m_combobox->Append(_T("another one"));
 439     m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
 440 }
 441
 442 void ComboboxWidgetsPage::OnUpdateUICurText(wxUpdateUIEvent& event)
 443 {
 444     if (m_combobox)
 445         event.SetText( wxString::Format(_T("%d"), m_combobox->GetSelection()) );
 446 }
 447
 448 void ComboboxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 449 {
 450     if (m_combobox)
 451         event.Enable( m_chkSort->GetValue() || m_chkReadonly->GetValue() );
 452 }
 453
 454 void ComboboxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
 455 {
 456     if (m_combobox)
 457     {
 458       unsigned long n;
 459       event.Enable(m_textDelete->GetValue().ToULong(&n) &&
 460                  (n < (unsigned)m_combobox->GetCount()));
 461     }
 462 }
 463
 464 void ComboboxWidgetsPage::OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event)
 465 {
 466     if (m_combobox)
 467         event.Enable(m_combobox->GetSelection() != -1);
 468 }
 469
 470 void ComboboxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
 471 {
 472     if (m_combobox)
 473         event.Enable(m_combobox->GetCount() != 0);
 474 }
 475
 476 void ComboboxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
 477 {
 478     if (m_combobox)
 479         event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 480 }
 481
 482 void ComboboxWidgetsPage::OnComboText(wxCommandEvent& event)
 483 {
 484     if (!m_combobox)
 485         return;
 486
 487     wxString s = event.GetString();
 488
 489     wxASSERT_MSG( s == m_combobox->GetValue(),
 490                   _T("event and combobox values should be the same") );
 491
 492     wxLogMessage(_T("Combobox text changed (now '%s')"), s.c_str());
 493 }
 494
 495 void ComboboxWidgetsPage::OnComboBox(wxCommandEvent& event)
 496 {
 497     int sel = event.GetInt();
 498     m_textDelete->SetValue(wxString::Format(_T("%ld"), sel));
 499
 500     wxLogMessage(_T("Combobox item %d selected"), sel);
 501 }
 502
 503 void ComboboxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& event)
 504 {
 505     CreateCombo();
 506 }
 507
 508 #endif //wxUSE_COMBOBOX
 509