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 // for all others, include the necessary headers
  28 #ifndef WX_PRECOMP
  29     #include "wx/log.h"
  30
  31     #include "wx/button.h"
  32     #include "wx/checkbox.h"
  33     #include "wx/combobox.h"
  34     #include "wx/radiobox.h"
  35     #include "wx/statbox.h"
  36     #include "wx/textctrl.h"
  37 #endif
  38
  39 #include "wx/sizer.h"
  40
  41 #include "widgets.h"
  42
  43 #include "icons/combobox.xpm"
  44
  45 // ----------------------------------------------------------------------------
  46 // constants
  47 // ----------------------------------------------------------------------------
  48
  49 // control ids
  50 enum
  51 {
  52     ComboPage_Reset = 100,
  53     ComboPage_CurText,
  54     ComboPage_Add,
  55     ComboPage_AddText,
  56     ComboPage_AddSeveral,
  57     ComboPage_AddMany,
  58     ComboPage_Clear,
  59     ComboPage_Change,
  60     ComboPage_ChangeText,
  61     ComboPage_Delete,
  62     ComboPage_DeleteText,
  63     ComboPage_DeleteSel,
  64     ComboPage_Combo
  65 };
  66
  67 // kinds of comboboxes
  68 enum
  69 {
  70     ComboKind_Default,
  71     ComboKind_Simple,
  72     ComboKind_DropDown
  73 };
  74
  75 // ----------------------------------------------------------------------------
  76 // ComboboxWidgetsPage
  77 // ----------------------------------------------------------------------------
  78
  79 class ComboboxWidgetsPage : public WidgetsPage
  80 {
  81 public:
  82     ComboboxWidgetsPage(wxNotebook *notebook, wxImageList *imaglist);
  83
  84 protected:
  85     // event handlers
  86     void OnButtonReset(wxCommandEvent& event);
  87     void OnButtonChange(wxCommandEvent& event);
  88     void OnButtonDelete(wxCommandEvent& event);
  89     void OnButtonDeleteSel(wxCommandEvent& event);
  90     void OnButtonClear(wxCommandEvent& event);
  91     void OnButtonAdd(wxCommandEvent& event);
  92     void OnButtonAddSeveral(wxCommandEvent& event);
  93     void OnButtonAddMany(wxCommandEvent& event);
  94
  95     void OnComboBox(wxCommandEvent& event);
  96     void OnComboText(wxCommandEvent& event);
  97
  98     void OnCheckOrRadioBox(wxCommandEvent& event);
  99
 100     void OnUpdateUICurText(wxUpdateUIEvent& event);
 101
 102     void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
 103     void OnUpdateUIClearButton(wxUpdateUIEvent& event);
 104     void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
 105     void OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event);
 106     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 107
 108     // reset the combobox parameters
 109     void Reset();
 110
 111     // (re)create the combobox
 112     void CreateCombo();
 113
 114     // the controls
 115     // ------------
 116
 117     // the sel mode radiobox
 118     wxRadioBox *m_radioKind;
 119
 120     // the checkboxes for styles
 121     wxCheckBox *m_chkSort,
 122                *m_chkReadonly;
 123
 124     // the combobox itself and the sizer it is in
 125     wxComboBox *m_combobox;
 126     wxSizer *m_sizerCombo;
 127
 128     // the text entries for "Add/change string" and "Delete" buttons
 129     wxTextCtrl *m_textAdd,
 130                *m_textChange,
 131                *m_textDelete;
 132
 133 private:
 134     DECLARE_EVENT_TABLE();
 135     DECLARE_WIDGETS_PAGE(ComboboxWidgetsPage);
 136 };
 137
 138 // ----------------------------------------------------------------------------
 139 // event tables
 140 // ----------------------------------------------------------------------------
 141
 142 BEGIN_EVENT_TABLE(ComboboxWidgetsPage, WidgetsPage)
 143     EVT_BUTTON(ComboPage_Reset, ComboboxWidgetsPage::OnButtonReset)
 144     EVT_BUTTON(ComboPage_Change, ComboboxWidgetsPage::OnButtonChange)
 145     EVT_BUTTON(ComboPage_Delete, ComboboxWidgetsPage::OnButtonDelete)
 146     EVT_BUTTON(ComboPage_DeleteSel, ComboboxWidgetsPage::OnButtonDeleteSel)
 147     EVT_BUTTON(ComboPage_Clear, ComboboxWidgetsPage::OnButtonClear)
 148     EVT_BUTTON(ComboPage_Add, ComboboxWidgetsPage::OnButtonAdd)
 149     EVT_BUTTON(ComboPage_AddSeveral, ComboboxWidgetsPage::OnButtonAddSeveral)
 150     EVT_BUTTON(ComboPage_AddMany, ComboboxWidgetsPage::OnButtonAddMany)
 151
 152     EVT_TEXT_ENTER(ComboPage_AddText, ComboboxWidgetsPage::OnButtonAdd)
 153     EVT_TEXT_ENTER(ComboPage_DeleteText, ComboboxWidgetsPage::OnButtonDelete)
 154
 155     EVT_UPDATE_UI(ComboPage_CurText, ComboboxWidgetsPage::OnUpdateUICurText)
 156
 157     EVT_UPDATE_UI(ComboPage_Reset, ComboboxWidgetsPage::OnUpdateUIResetButton)
 158     EVT_UPDATE_UI(ComboPage_AddSeveral, ComboboxWidgetsPage::OnUpdateUIAddSeveral)
 159     EVT_UPDATE_UI(ComboPage_Clear, ComboboxWidgetsPage::OnUpdateUIClearButton)
 160     EVT_UPDATE_UI(ComboPage_DeleteText, ComboboxWidgetsPage::OnUpdateUIClearButton)
 161     EVT_UPDATE_UI(ComboPage_Delete, ComboboxWidgetsPage::OnUpdateUIDeleteButton)
 162     EVT_UPDATE_UI(ComboPage_Change, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 163     EVT_UPDATE_UI(ComboPage_ChangeText, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 164     EVT_UPDATE_UI(ComboPage_DeleteSel, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 165
 166     EVT_COMBOBOX(ComboPage_Combo, ComboboxWidgetsPage::OnComboBox)
 167     EVT_TEXT(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 168
 169     EVT_CHECKBOX(-1, ComboboxWidgetsPage::OnCheckOrRadioBox)
 170     EVT_RADIOBOX(-1, ComboboxWidgetsPage::OnCheckOrRadioBox)
 171 END_EVENT_TABLE()
 172
 173 // ============================================================================
 174 // implementation
 175 // ============================================================================
 176
 177 IMPLEMENT_WIDGETS_PAGE(ComboboxWidgetsPage, _T("Combobox"));
 178
 179 ComboboxWidgetsPage::ComboboxWidgetsPage(wxNotebook *notebook,
 180                                        wxImageList *imaglist)
 181                   : WidgetsPage(notebook)
 182 {
 183     imaglist->Add(wxBitmap(combobox_xpm));
 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     /*
 193        What we create here is a frame having 3 panes: style pane is the
 194        leftmost one, in the middle the pane with buttons allowing to perform
 195        miscellaneous combobox operations and the pane containing the combobox
 196        itself to the right
 197     */
 198     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 199
 200     // left pane
 201     wxStaticBox *box = new wxStaticBox(this, -1, _T("&Set style"));
 202
 203     // should be in sync with ComboKind_XXX values
 204     static const wxString kinds[] =
 205     {
 206         _T("default"),
 207         _T("simple"),
 208         _T("drop down"),
 209     };
 210
 211     m_radioKind = new wxRadioBox(this, -1, _T("Combobox &kind:"),
 212                                  wxDefaultPosition, wxDefaultSize,
 213                                  WXSIZEOF(kinds), kinds,
 214                                  1, wxRA_SPECIFY_COLS);
 215
 216     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 217
 218     m_chkSort = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Sort items"));
 219     m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Read only"));
 220
 221     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 222     sizerLeft->Add(m_radioKind, 0, wxGROW | wxALL, 5);
 223
 224     wxButton *btn = new wxButton(this, ComboPage_Reset, _T("&Reset"));
 225     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 226
 227     // middle pane
 228     wxStaticBox *box2 = new wxStaticBox(this, -1, _T("&Change combobox contents"));
 229     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 230
 231     wxSizer *sizerRow;
 232
 233     wxTextCtrl *text;
 234     sizerRow = CreateSizerWithTextAndLabel(_T("Current selection"),
 235                                            ComboPage_CurText,
 236                                            &text);
 237     text->SetEditable(FALSE);
 238
 239     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 240
 241     sizerRow = CreateSizerWithTextAndButton(ComboPage_Add,
 242                                             _T("&Add this string"),
 243                                             ComboPage_AddText,
 244                                             &m_textAdd);
 245     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 246
 247     btn = new wxButton(this, ComboPage_AddSeveral, _T("&Insert a few strings"));
 248     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 249
 250     btn = new wxButton(this, ComboPage_AddMany, _T("Add &many strings"));
 251     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 252
 253     sizerRow = CreateSizerWithTextAndButton(ComboPage_Change,
 254                                             _T("C&hange current"),
 255                                             ComboPage_ChangeText,
 256                                             &m_textChange);
 257     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 258
 259     sizerRow = CreateSizerWithTextAndButton(ComboPage_Delete,
 260                                             _T("&Delete this item"),
 261                                             ComboPage_DeleteText,
 262                                             &m_textDelete);
 263     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 264
 265     btn = new wxButton(this, ComboPage_DeleteSel, _T("Delete &selection"));
 266     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 267
 268     btn = new wxButton(this, ComboPage_Clear, _T("&Clear"));
 269     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 270
 271     // right pane
 272     wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
 273     m_combobox = new wxComboBox(this, ComboPage_Combo, _T(""),
 274                                 wxDefaultPosition, wxDefaultSize,
 275                                 0, NULL,
 276                                 0);
 277     sizerRight->Add(m_combobox, 1, wxGROW | wxALL, 5);
 278     sizerRight->SetMinSize(250, 0);
 279     m_sizerCombo = sizerRight; // save it to modify it later
 280
 281     // the 3 panes panes compose the window
 282     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 283     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 284     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 285
 286     // final initializations
 287     Reset();
 288
 289     SetAutoLayout(TRUE);
 290     SetSizer(sizerTop);
 291
 292     sizerTop->Fit(this);
 293 }
 294
 295 // ----------------------------------------------------------------------------
 296 // operations
 297 // ----------------------------------------------------------------------------
 298
 299 void ComboboxWidgetsPage::Reset()
 300 {
 301     m_chkSort->SetValue(FALSE);
 302     m_chkReadonly->SetValue(FALSE);
 303 }
 304
 305 void ComboboxWidgetsPage::CreateCombo()
 306 {
 307     int flags = 0;
 308
 309     if ( m_chkSort->GetValue() )
 310         flags |= wxCB_SORT;
 311     if ( m_chkReadonly->GetValue() )
 312         flags |= wxCB_READONLY;
 313
 314     switch ( m_radioKind->GetSelection() )
 315     {
 316         default:
 317             wxFAIL_MSG( _T("unknown combo kind") );
 318             // fall through
 319
 320         case ComboKind_Default:
 321             break;
 322
 323         case ComboKind_Simple:
 324             flags |= wxCB_SIMPLE;
 325             break;
 326
 327         case ComboKind_DropDown:
 328             flags = wxCB_DROPDOWN;
 329             break;
 330     }
 331
 332     wxArrayString items;
 333     if ( m_combobox )
 334     {
 335         int count = m_combobox->GetCount();
 336         for ( int n = 0; n < count; n++ )
 337         {
 338             items.Add(m_combobox->GetString(n));
 339         }
 340
 341         m_sizerCombo->Remove(m_combobox);
 342         delete m_combobox;
 343     }
 344
 345     m_combobox = new wxComboBox(this, ComboPage_Combo, _T(""),
 346                                 wxDefaultPosition, wxDefaultSize,
 347                                 0, NULL,
 348                                 flags);
 349
 350     size_t count = items.GetCount();
 351     for ( size_t n = 0; n < count; n++ )
 352     {
 353         m_combobox->Append(items[n]);
 354     }
 355
 356     m_sizerCombo->Add(m_combobox, 1, wxGROW | wxALL, 5);
 357     m_sizerCombo->Layout();
 358 }
 359
 360 // ----------------------------------------------------------------------------
 361 // event handlers
 362 // ----------------------------------------------------------------------------
 363
 364 void ComboboxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 365 {
 366     Reset();
 367
 368     CreateCombo();
 369 }
 370
 371 void ComboboxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
 372 {
 373     int sel = m_combobox->GetSelection();
 374     if ( sel != -1 )
 375     {
 376 #ifndef __WXGTK__
 377         m_combobox->SetString(sel, m_textChange->GetValue());
 378 #else
 379         wxLogMessage(_T("Not implemented in wxGTK"));
 380 #endif
 381     }
 382 }
 383
 384 void ComboboxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
 385 {
 386     unsigned long n;
 387     if ( !m_textDelete->GetValue().ToULong(&n) ||
 388             (n >= (unsigned)m_combobox->GetCount()) )
 389     {
 390         return;
 391     }
 392
 393     m_combobox->Delete(n);
 394 }
 395
 396 void ComboboxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
 397 {
 398     int sel = m_combobox->GetSelection();
 399     if ( sel != -1 )
 400     {
 401         m_combobox->Delete(sel);
 402     }
 403 }
 404
 405 void ComboboxWidgetsPage::OnButtonClear(wxCommandEvent& event)
 406 {
 407     m_combobox->Clear();
 408 }
 409
 410 void ComboboxWidgetsPage::OnButtonAdd(wxCommandEvent& event)
 411 {
 412     static size_t s_item = 0;
 413
 414     wxString s = m_textAdd->GetValue();
 415     if ( !m_textAdd->IsModified() )
 416     {
 417         // update the default string
 418         m_textAdd->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 419     }
 420
 421     m_combobox->Append(s);
 422 }
 423
 424 void ComboboxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
 425 {
 426     // "many" means 1000 here
 427     for ( size_t n = 0; n < 1000; n++ )
 428     {
 429         m_combobox->Append(wxString::Format(_T("item #%u"), n));
 430     }
 431 }
 432
 433 void ComboboxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& event)
 434 {
 435     m_combobox->Append(_T("First"));
 436     m_combobox->Append(_T("another one"));
 437     m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
 438 }
 439
 440 void ComboboxWidgetsPage::OnUpdateUICurText(wxUpdateUIEvent& event)
 441 {
 442     event.SetText( wxString::Format(_T("%d"), m_combobox->GetSelection()) );
 443 }
 444
 445 void ComboboxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 446 {
 447     event.Enable( m_chkSort->GetValue() || m_chkReadonly->GetValue() );
 448 }
 449
 450 void ComboboxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
 451 {
 452     unsigned long n;
 453     event.Enable(m_textDelete->GetValue().ToULong(&n) &&
 454                     (n < (unsigned)m_combobox->GetCount()));
 455 }
 456
 457 void ComboboxWidgetsPage::OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event)
 458 {
 459     event.Enable(m_combobox->GetSelection() != -1);
 460 }
 461
 462 void ComboboxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
 463 {
 464     event.Enable(m_combobox->GetCount() != 0);
 465 }
 466
 467 void ComboboxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
 468 {
 469     event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 470 }
 471
 472 void ComboboxWidgetsPage::OnComboText(wxCommandEvent& event)
 473 {
 474     wxString s = event.GetString();
 475
 476     wxASSERT_MSG( s == m_combobox->GetValue(),
 477                   _T("event and combobox values should be the same") );
 478
 479     wxLogMessage(_T("Combobox text changed (now '%s')"), s.c_str());
 480 }
 481
 482 void ComboboxWidgetsPage::OnComboBox(wxCommandEvent& event)
 483 {
 484     int sel = event.GetInt();
 485     m_textDelete->SetValue(wxString::Format(_T("%ld"), sel));
 486
 487     wxLogMessage(_T("Combobox item %d selected"), sel);
 488 }
 489
 490 void ComboboxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& event)
 491 {
 492     CreateCombo();
 493 }
 494