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/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 "widgets.h"
  45 #if 1
  46 #include "icons/combobox.xpm"
  47
  48 // ----------------------------------------------------------------------------
  49 // constants
  50 // ----------------------------------------------------------------------------
  51
  52 // control ids
  53 enum
  54 {
  55     ComboPage_Reset = 100,
  56     ComboPage_CurText,
  57     ComboPage_Add,
  58     ComboPage_AddText,
  59     ComboPage_AddSeveral,
  60     ComboPage_AddMany,
  61     ComboPage_Clear,
  62     ComboPage_Change,
  63     ComboPage_ChangeText,
  64     ComboPage_Delete,
  65     ComboPage_DeleteText,
  66     ComboPage_DeleteSel,
  67     ComboPage_Combo
  68 };
  69
  70 // kinds of comboboxes
  71 enum
  72 {
  73     ComboKind_Default,
  74     ComboKind_Simple,
  75     ComboKind_DropDown
  76 };
  77
  78 // ----------------------------------------------------------------------------
  79 // ComboboxWidgetsPage
  80 // ----------------------------------------------------------------------------
  81
  82 class ComboboxWidgetsPage : public WidgetsPage
  83 {
  84 public:
  85     ComboboxWidgetsPage(wxNotebook *notebook, wxImageList *imaglist);
  86
  87 protected:
  88     // event handlers
  89     void OnButtonReset(wxCommandEvent& event);
  90     void OnButtonChange(wxCommandEvent& event);
  91     void OnButtonDelete(wxCommandEvent& event);
  92     void OnButtonDeleteSel(wxCommandEvent& event);
  93     void OnButtonClear(wxCommandEvent& event);
  94     void OnButtonAdd(wxCommandEvent& event);
  95     void OnButtonAddSeveral(wxCommandEvent& event);
  96     void OnButtonAddMany(wxCommandEvent& event);
  97
  98     void OnComboBox(wxCommandEvent& event);
  99     void OnComboText(wxCommandEvent& event);
 100
 101     void OnCheckOrRadioBox(wxCommandEvent& event);
 102
 103     void OnUpdateUICurText(wxUpdateUIEvent& event);
 104
 105     void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
 106     void OnUpdateUIClearButton(wxUpdateUIEvent& event);
 107     void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
 108     void OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event);
 109     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 110
 111     // reset the combobox parameters
 112     void Reset();
 113
 114     // (re)create the combobox
 115     void CreateCombo();
 116
 117     // the controls
 118     // ------------
 119
 120     // the sel mode radiobox
 121     wxRadioBox *m_radioKind;
 122
 123     // the checkboxes for styles
 124     wxCheckBox *m_chkSort,
 125                *m_chkReadonly;
 126
 127     // the combobox itself and the sizer it is in
 128     wxComboBox *m_combobox;
 129     wxSizer *m_sizerCombo;
 130
 131     // the text entries for "Add/change string" and "Delete" buttons
 132     wxTextCtrl *m_textAdd,
 133                *m_textChange,
 134                *m_textDelete;
 135
 136 private:
 137     DECLARE_EVENT_TABLE()
 138     DECLARE_WIDGETS_PAGE(ComboboxWidgetsPage)
 139 };
 140
 141 // ----------------------------------------------------------------------------
 142 // event tables
 143 // ----------------------------------------------------------------------------
 144
 145 BEGIN_EVENT_TABLE(ComboboxWidgetsPage, WidgetsPage)
 146     EVT_BUTTON(ComboPage_Reset, ComboboxWidgetsPage::OnButtonReset)
 147     EVT_BUTTON(ComboPage_Change, ComboboxWidgetsPage::OnButtonChange)
 148     EVT_BUTTON(ComboPage_Delete, ComboboxWidgetsPage::OnButtonDelete)
 149     EVT_BUTTON(ComboPage_DeleteSel, ComboboxWidgetsPage::OnButtonDeleteSel)
 150     EVT_BUTTON(ComboPage_Clear, ComboboxWidgetsPage::OnButtonClear)
 151     EVT_BUTTON(ComboPage_Add, ComboboxWidgetsPage::OnButtonAdd)
 152     EVT_BUTTON(ComboPage_AddSeveral, ComboboxWidgetsPage::OnButtonAddSeveral)
 153     EVT_BUTTON(ComboPage_AddMany, ComboboxWidgetsPage::OnButtonAddMany)
 154
 155     EVT_TEXT_ENTER(ComboPage_AddText, ComboboxWidgetsPage::OnButtonAdd)
 156     EVT_TEXT_ENTER(ComboPage_DeleteText, ComboboxWidgetsPage::OnButtonDelete)
 157
 158     EVT_UPDATE_UI(ComboPage_CurText, ComboboxWidgetsPage::OnUpdateUICurText)
 159
 160     EVT_UPDATE_UI(ComboPage_Reset, ComboboxWidgetsPage::OnUpdateUIResetButton)
 161     EVT_UPDATE_UI(ComboPage_AddSeveral, ComboboxWidgetsPage::OnUpdateUIAddSeveral)
 162     EVT_UPDATE_UI(ComboPage_Clear, ComboboxWidgetsPage::OnUpdateUIClearButton)
 163     EVT_UPDATE_UI(ComboPage_DeleteText, ComboboxWidgetsPage::OnUpdateUIClearButton)
 164     EVT_UPDATE_UI(ComboPage_Delete, ComboboxWidgetsPage::OnUpdateUIDeleteButton)
 165     EVT_UPDATE_UI(ComboPage_Change, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 166     EVT_UPDATE_UI(ComboPage_ChangeText, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 167     EVT_UPDATE_UI(ComboPage_DeleteSel, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 168
 169     EVT_COMBOBOX(ComboPage_Combo, ComboboxWidgetsPage::OnComboBox)
 170     EVT_TEXT(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 171
 172     EVT_CHECKBOX(-1, ComboboxWidgetsPage::OnCheckOrRadioBox)
 173     EVT_RADIOBOX(-1, ComboboxWidgetsPage::OnCheckOrRadioBox)
 174 END_EVENT_TABLE()
 175
 176 // ============================================================================
 177 // implementation
 178 // ============================================================================
 179
 180 IMPLEMENT_WIDGETS_PAGE(ComboboxWidgetsPage, _T("Combobox"));
 181
 182 ComboboxWidgetsPage::ComboboxWidgetsPage(wxNotebook *notebook,
 183                                        wxImageList *imaglist)
 184                   : WidgetsPage(notebook)
 185 {
 186     // init everything
 187     m_chkSort =
 188     m_chkReadonly = (wxCheckBox *)NULL;
 189
 190     m_combobox = (wxComboBox *)NULL;
 191     m_sizerCombo = (wxSizer *)NULL;
 192
 193     imaglist->Add(wxBitmap(combobox_xpm));
 194
 195     /*
 196        What we create here is a frame having 3 panes: style pane is the
 197        leftmost one, in the middle the pane with buttons allowing to perform
 198        miscellaneous combobox operations and the pane containing the combobox
 199        itself to the right
 200     */
 201     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 202
 203     // left pane
 204     wxStaticBox *box = new wxStaticBox(this, -1, _T("&Set style"));
 205
 206     // should be in sync with ComboKind_XXX values
 207     static const wxString kinds[] =
 208     {
 209         _T("default"),
 210         _T("simple"),
 211         _T("drop down"),
 212     };
 213
 214     m_radioKind = new wxRadioBox(this, -1, _T("Combobox &kind:"),
 215                                  wxDefaultPosition, wxDefaultSize,
 216                                  WXSIZEOF(kinds), kinds,
 217                                  1, wxRA_SPECIFY_COLS);
 218
 219     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 220
 221     m_chkSort = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Sort items"));
 222     m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Read only"));
 223
 224     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 225     sizerLeft->Add(m_radioKind, 0, wxGROW | wxALL, 5);
 226
 227     wxButton *btn = new wxButton(this, ComboPage_Reset, _T("&Reset"));
 228     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 229
 230     // middle pane
 231     wxStaticBox *box2 = new wxStaticBox(this, -1, _T("&Change combobox contents"));
 232     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 233
 234     wxSizer *sizerRow;
 235
 236     wxTextCtrl *text;
 237     sizerRow = CreateSizerWithTextAndLabel(_T("Current selection"),
 238                                            ComboPage_CurText,
 239                                            &text);
 240     text->SetEditable(FALSE);
 241
 242     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 243
 244     sizerRow = CreateSizerWithTextAndButton(ComboPage_Add,
 245                                             _T("&Add this string"),
 246                                             ComboPage_AddText,
 247                                             &m_textAdd);
 248     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 249
 250     btn = new wxButton(this, ComboPage_AddSeveral, _T("&Insert a few strings"));
 251     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 252
 253     btn = new wxButton(this, ComboPage_AddMany, _T("Add &many strings"));
 254     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 255
 256     sizerRow = CreateSizerWithTextAndButton(ComboPage_Change,
 257                                             _T("C&hange current"),
 258                                             ComboPage_ChangeText,
 259                                             &m_textChange);
 260     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 261
 262     sizerRow = CreateSizerWithTextAndButton(ComboPage_Delete,
 263                                             _T("&Delete this item"),
 264                                             ComboPage_DeleteText,
 265                                             &m_textDelete);
 266     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 267
 268     btn = new wxButton(this, ComboPage_DeleteSel, _T("Delete &selection"));
 269     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 270
 271     btn = new wxButton(this, ComboPage_Clear, _T("&Clear"));
 272     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 273
 274     // right pane
 275     wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
 276     m_combobox = new wxComboBox(this, ComboPage_Combo, _T(""),
 277                                 wxDefaultPosition, wxDefaultSize,
 278                                 0, NULL,
 279                                 0);
 280     sizerRight->Add(m_combobox, 1, wxGROW | wxALL, 5);
 281     sizerRight->SetMinSize(150, 0);
 282     m_sizerCombo = sizerRight; // save it to modify it later
 283
 284     // the 3 panes panes compose the window
 285     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 286     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 287     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 288
 289     // final initializations
 290     Reset();
 291
 292     SetAutoLayout(TRUE);
 293     SetSizer(sizerTop);
 294
 295     sizerTop->Fit(this);
 296 }
 297
 298 // ----------------------------------------------------------------------------
 299 // operations
 300 // ----------------------------------------------------------------------------
 301
 302 void ComboboxWidgetsPage::Reset()
 303 {
 304     m_chkSort->SetValue(FALSE);
 305     m_chkReadonly->SetValue(FALSE);
 306 }
 307
 308 void ComboboxWidgetsPage::CreateCombo()
 309 {
 310     int flags = 0;
 311
 312     if ( m_chkSort->GetValue() )
 313         flags |= wxCB_SORT;
 314     if ( m_chkReadonly->GetValue() )
 315         flags |= wxCB_READONLY;
 316
 317     switch ( m_radioKind->GetSelection() )
 318     {
 319         default:
 320             wxFAIL_MSG( _T("unknown combo kind") );
 321             // fall through
 322
 323         case ComboKind_Default:
 324             break;
 325
 326         case ComboKind_Simple:
 327             flags |= wxCB_SIMPLE;
 328             break;
 329
 330         case ComboKind_DropDown:
 331             flags = wxCB_DROPDOWN;
 332             break;
 333     }
 334
 335     wxArrayString items;
 336     if ( m_combobox )
 337     {
 338         int count = m_combobox->GetCount();
 339         for ( int n = 0; n < count; n++ )
 340         {
 341             items.Add(m_combobox->GetString(n));
 342         }
 343
 344         m_sizerCombo->Detach( m_combobox );
 345         delete m_combobox;
 346     }
 347
 348     m_combobox = new wxComboBox(this, ComboPage_Combo, _T(""),
 349                                 wxDefaultPosition, wxDefaultSize,
 350                                 0, NULL,
 351                                 flags);
 352
 353     size_t count = items.GetCount();
 354     for ( size_t n = 0; n < count; n++ )
 355     {
 356         m_combobox->Append(items[n]);
 357     }
 358
 359     m_sizerCombo->Add(m_combobox, 1, wxGROW | wxALL, 5);
 360     m_sizerCombo->Layout();
 361 }
 362
 363 // ----------------------------------------------------------------------------
 364 // event handlers
 365 // ----------------------------------------------------------------------------
 366
 367 void ComboboxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 368 {
 369     Reset();
 370
 371     CreateCombo();
 372 }
 373
 374 void ComboboxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
 375 {
 376     int sel = m_combobox->GetSelection();
 377     if ( sel != -1 )
 378     {
 379 #ifndef __WXGTK__
 380         m_combobox->SetString(sel, m_textChange->GetValue());
 381 #else
 382         wxLogMessage(_T("Not implemented in wxGTK"));
 383 #endif
 384     }
 385 }
 386
 387 void ComboboxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
 388 {
 389     unsigned long n;
 390     if ( !m_textDelete->GetValue().ToULong(&n) ||
 391             (n >= (unsigned)m_combobox->GetCount()) )
 392     {
 393         return;
 394     }
 395
 396     m_combobox->Delete(n);
 397 }
 398
 399 void ComboboxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
 400 {
 401     int sel = m_combobox->GetSelection();
 402     if ( sel != -1 )
 403     {
 404         m_combobox->Delete(sel);
 405     }
 406 }
 407
 408 void ComboboxWidgetsPage::OnButtonClear(wxCommandEvent& event)
 409 {
 410     m_combobox->Clear();
 411 }
 412
 413 void ComboboxWidgetsPage::OnButtonAdd(wxCommandEvent& event)
 414 {
 415     static unsigned int s_item = 0;
 416
 417     wxString s = m_textAdd->GetValue();
 418     if ( !m_textAdd->IsModified() )
 419     {
 420         // update the default string
 421         m_textAdd->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 422     }
 423
 424     m_combobox->Append(s);
 425 }
 426
 427 void ComboboxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
 428 {
 429     // "many" means 1000 here
 430     for ( unsigned int n = 0; n < 1000; n++ )
 431     {
 432         m_combobox->Append(wxString::Format(_T("item #%u"), n));
 433     }
 434 }
 435
 436 void ComboboxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& event)
 437 {
 438     m_combobox->Append(_T("First"));
 439     m_combobox->Append(_T("another one"));
 440     m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
 441 }
 442
 443 void ComboboxWidgetsPage::OnUpdateUICurText(wxUpdateUIEvent& event)
 444 {
 445     if (m_combobox)
 446         event.SetText( wxString::Format(_T("%d"), m_combobox->GetSelection()) );
 447 }
 448
 449 void ComboboxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 450 {
 451     if (m_combobox)
 452         event.Enable( m_chkSort->GetValue() || m_chkReadonly->GetValue() );
 453 }
 454
 455 void ComboboxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
 456 {
 457     if (m_combobox)
 458     {
 459       unsigned long n;
 460       event.Enable(m_textDelete->GetValue().ToULong(&n) &&
 461         (n < (unsigned)m_combobox->GetCount()));
 462     }
 463 }
 464
 465 void ComboboxWidgetsPage::OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event)
 466 {
 467     if (m_combobox)
 468         event.Enable(m_combobox->GetSelection() != -1);
 469 }
 470
 471 void ComboboxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
 472 {
 473     if (m_combobox)
 474         event.Enable(m_combobox->GetCount() != 0);
 475 }
 476
 477 void ComboboxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
 478 {
 479     if (m_combobox)
 480         event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 481 }
 482
 483 void ComboboxWidgetsPage::OnComboText(wxCommandEvent& event)
 484 {
 485     if (!m_combobox)
 486         return;
 487
 488     wxString s = event.GetString();
 489
 490     wxASSERT_MSG( s == m_combobox->GetValue(),
 491                   _T("event and combobox values should be the same") );
 492
 493     wxLogMessage(_T("Combobox text changed (now '%s')"), s.c_str());
 494 }
 495
 496 void ComboboxWidgetsPage::OnComboBox(wxCommandEvent& event)
 497 {
 498     long sel = event.GetInt();
 499     m_textDelete->SetValue(wxString::Format(_T("%ld"), sel));
 500
 501     wxLogMessage(_T("Combobox item %ld selected"), sel);
 502 }
 503
 504 void ComboboxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& event)
 505 {
 506     CreateCombo();
 507 }
 508
 509 #endif //wxUSE_COMBOBOX
 510
 511 #endif