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 "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_Insert,
  58     ComboPage_InsertText,
  59     ComboPage_Add,
  60     ComboPage_AddText,
  61     ComboPage_AddSeveral,
  62     ComboPage_AddMany,
  63     ComboPage_Clear,
  64     ComboPage_Change,
  65     ComboPage_ChangeText,
  66     ComboPage_Delete,
  67     ComboPage_DeleteText,
  68     ComboPage_DeleteSel,
  69     ComboPage_Combo
  70 };
  71
  72 // kinds of comboboxes
  73 enum
  74 {
  75     ComboKind_Default,
  76     ComboKind_Simple,
  77     ComboKind_DropDown
  78 };
  79
  80 // ----------------------------------------------------------------------------
  81 // ComboboxWidgetsPage
  82 // ----------------------------------------------------------------------------
  83
  84 class ComboboxWidgetsPage : public WidgetsPage
  85 {
  86 public:
  87     ComboboxWidgetsPage(wxNotebook *notebook, wxImageList *imaglist);
  88
  89 protected:
  90     // event handlers
  91     void OnButtonReset(wxCommandEvent& event);
  92     void OnButtonChange(wxCommandEvent& event);
  93     void OnButtonDelete(wxCommandEvent& event);
  94     void OnButtonDeleteSel(wxCommandEvent& event);
  95     void OnButtonClear(wxCommandEvent& event);
  96     void OnButtonInsert(wxCommandEvent &event);
  97     void OnButtonAdd(wxCommandEvent& event);
  98     void OnButtonAddSeveral(wxCommandEvent& event);
  99     void OnButtonAddMany(wxCommandEvent& event);
 100
 101     void OnComboBox(wxCommandEvent& event);
 102     void OnComboText(wxCommandEvent& event);
 103
 104     void OnCheckOrRadioBox(wxCommandEvent& event);
 105
 106     void OnUpdateUICurText(wxUpdateUIEvent& event);
 107
 108     void OnUpdateUIInsert(wxUpdateUIEvent& event);
 109     void OnUpdateUIAddSeveral(wxUpdateUIEvent& event);
 110     void OnUpdateUIClearButton(wxUpdateUIEvent& event);
 111     void OnUpdateUIDeleteButton(wxUpdateUIEvent& event);
 112     void OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event);
 113     void OnUpdateUIResetButton(wxUpdateUIEvent& event);
 114
 115     // reset the combobox parameters
 116     void Reset();
 117
 118     // (re)create the combobox
 119     void CreateCombo();
 120
 121     // the controls
 122     // ------------
 123
 124     // the sel mode radiobox
 125     wxRadioBox *m_radioKind;
 126
 127     // the checkboxes for styles
 128     wxCheckBox *m_chkSort,
 129                *m_chkReadonly;
 130
 131     // the combobox itself and the sizer it is in
 132     wxComboBox *m_combobox;
 133     wxSizer *m_sizerCombo;
 134
 135     // the text entries for "Add/change string" and "Delete" buttons
 136     wxTextCtrl *m_textInsert,
 137                *m_textAdd,
 138                *m_textChange,
 139                *m_textDelete;
 140
 141 private:
 142     DECLARE_EVENT_TABLE()
 143     DECLARE_WIDGETS_PAGE(ComboboxWidgetsPage)
 144 };
 145
 146 // ----------------------------------------------------------------------------
 147 // event tables
 148 // ----------------------------------------------------------------------------
 149
 150 BEGIN_EVENT_TABLE(ComboboxWidgetsPage, WidgetsPage)
 151     EVT_BUTTON(ComboPage_Reset, ComboboxWidgetsPage::OnButtonReset)
 152     EVT_BUTTON(ComboPage_Change, ComboboxWidgetsPage::OnButtonChange)
 153     EVT_BUTTON(ComboPage_Delete, ComboboxWidgetsPage::OnButtonDelete)
 154     EVT_BUTTON(ComboPage_DeleteSel, ComboboxWidgetsPage::OnButtonDeleteSel)
 155     EVT_BUTTON(ComboPage_Clear, ComboboxWidgetsPage::OnButtonClear)
 156     EVT_BUTTON(ComboPage_Insert, ComboboxWidgetsPage::OnButtonInsert)
 157     EVT_BUTTON(ComboPage_Add, ComboboxWidgetsPage::OnButtonAdd)
 158     EVT_BUTTON(ComboPage_AddSeveral, ComboboxWidgetsPage::OnButtonAddSeveral)
 159     EVT_BUTTON(ComboPage_AddMany, ComboboxWidgetsPage::OnButtonAddMany)
 160
 161     EVT_TEXT_ENTER(ComboPage_InsertText, ComboboxWidgetsPage::OnButtonInsert)
 162     EVT_TEXT_ENTER(ComboPage_AddText, ComboboxWidgetsPage::OnButtonAdd)
 163     EVT_TEXT_ENTER(ComboPage_DeleteText, ComboboxWidgetsPage::OnButtonDelete)
 164
 165     EVT_UPDATE_UI(ComboPage_CurText, ComboboxWidgetsPage::OnUpdateUICurText)
 166
 167     EVT_UPDATE_UI(ComboPage_Reset, ComboboxWidgetsPage::OnUpdateUIResetButton)
 168     EVT_UPDATE_UI(ComboPage_Insert, ComboboxWidgetsPage::OnUpdateUIInsert)
 169     EVT_UPDATE_UI(ComboPage_AddSeveral, ComboboxWidgetsPage::OnUpdateUIAddSeveral)
 170     EVT_UPDATE_UI(ComboPage_Clear, ComboboxWidgetsPage::OnUpdateUIClearButton)
 171     EVT_UPDATE_UI(ComboPage_DeleteText, ComboboxWidgetsPage::OnUpdateUIClearButton)
 172     EVT_UPDATE_UI(ComboPage_Delete, ComboboxWidgetsPage::OnUpdateUIDeleteButton)
 173     EVT_UPDATE_UI(ComboPage_Change, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 174     EVT_UPDATE_UI(ComboPage_ChangeText, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 175     EVT_UPDATE_UI(ComboPage_DeleteSel, ComboboxWidgetsPage::OnUpdateUIDeleteSelButton)
 176
 177     EVT_COMBOBOX(ComboPage_Combo, ComboboxWidgetsPage::OnComboBox)
 178     EVT_TEXT(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 179     EVT_TEXT_ENTER(ComboPage_Combo, ComboboxWidgetsPage::OnComboText)
 180
 181     EVT_CHECKBOX(wxID_ANY, ComboboxWidgetsPage::OnCheckOrRadioBox)
 182     EVT_RADIOBOX(wxID_ANY, ComboboxWidgetsPage::OnCheckOrRadioBox)
 183 END_EVENT_TABLE()
 184
 185 // ============================================================================
 186 // implementation
 187 // ============================================================================
 188
 189 IMPLEMENT_WIDGETS_PAGE(ComboboxWidgetsPage, _T("Combobox"));
 190
 191 ComboboxWidgetsPage::ComboboxWidgetsPage(wxNotebook *notebook,
 192                                        wxImageList *imaglist)
 193                   : WidgetsPage(notebook)
 194 {
 195     // init everything
 196     m_chkSort =
 197     m_chkReadonly = (wxCheckBox *)NULL;
 198
 199     m_combobox = (wxComboBox *)NULL;
 200     m_sizerCombo = (wxSizer *)NULL;
 201
 202     imaglist->Add(wxBitmap(combobox_xpm));
 203
 204     /*
 205        What we create here is a frame having 3 panes: style pane is the
 206        leftmost one, in the middle the pane with buttons allowing to perform
 207        miscellaneous combobox operations and the pane containing the combobox
 208        itself to the right
 209     */
 210     wxSizer *sizerTop = new wxBoxSizer(wxHORIZONTAL);
 211
 212     // left pane
 213     wxStaticBox *box = new wxStaticBox(this, wxID_ANY, _T("&Set style"));
 214
 215     // should be in sync with ComboKind_XXX values
 216     static const wxString kinds[] =
 217     {
 218         _T("default"),
 219         _T("simple"),
 220         _T("drop down"),
 221     };
 222
 223     m_radioKind = new wxRadioBox(this, wxID_ANY, _T("Combobox &kind:"),
 224                                  wxDefaultPosition, wxDefaultSize,
 225                                  WXSIZEOF(kinds), kinds,
 226                                  1, wxRA_SPECIFY_COLS);
 227
 228     wxSizer *sizerLeft = new wxStaticBoxSizer(box, wxVERTICAL);
 229
 230     m_chkSort = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Sort items"));
 231     m_chkReadonly = CreateCheckBoxAndAddToSizer(sizerLeft, _T("&Read only"));
 232
 233     sizerLeft->Add(5, 5, 0, wxGROW | wxALL, 5); // spacer
 234     sizerLeft->Add(m_radioKind, 0, wxGROW | wxALL, 5);
 235
 236     wxButton *btn = new wxButton(this, ComboPage_Reset, _T("&Reset"));
 237     sizerLeft->Add(btn, 0, wxALIGN_CENTRE_HORIZONTAL | wxALL, 15);
 238
 239     // middle pane
 240     wxStaticBox *box2 = new wxStaticBox(this, wxID_ANY,
 241         _T("&Change combobox contents"));
 242     wxSizer *sizerMiddle = new wxStaticBoxSizer(box2, wxVERTICAL);
 243
 244     wxSizer *sizerRow;
 245
 246     wxTextCtrl *text;
 247     sizerRow = CreateSizerWithTextAndLabel(_T("Current selection"),
 248                                            ComboPage_CurText,
 249                                            &text);
 250     text->SetEditable(false);
 251
 252     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 253
 254     sizerRow = CreateSizerWithTextAndButton(ComboPage_Insert,
 255                                             _T("&Insert this string"),
 256                                             ComboPage_InsertText,
 257                                             &m_textInsert);
 258     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 259
 260     sizerRow = CreateSizerWithTextAndButton(ComboPage_Add,
 261                                             _T("&Add this string"),
 262                                             ComboPage_AddText,
 263                                             &m_textAdd);
 264     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 265
 266     btn = new wxButton(this, ComboPage_AddSeveral, _T("&Append a few strings"));
 267     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 268
 269     btn = new wxButton(this, ComboPage_AddMany, _T("Append &many strings"));
 270     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 271
 272     sizerRow = CreateSizerWithTextAndButton(ComboPage_Change,
 273                                             _T("C&hange current"),
 274                                             ComboPage_ChangeText,
 275                                             &m_textChange);
 276     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 277
 278     sizerRow = CreateSizerWithTextAndButton(ComboPage_Delete,
 279                                             _T("&Delete this item"),
 280                                             ComboPage_DeleteText,
 281                                             &m_textDelete);
 282     sizerMiddle->Add(sizerRow, 0, wxALL | wxGROW, 5);
 283
 284     btn = new wxButton(this, ComboPage_DeleteSel, _T("Delete &selection"));
 285     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 286
 287     btn = new wxButton(this, ComboPage_Clear, _T("&Clear"));
 288     sizerMiddle->Add(btn, 0, wxALL | wxGROW, 5);
 289
 290     // right pane
 291     wxSizer *sizerRight = new wxBoxSizer(wxVERTICAL);
 292     m_combobox = new wxComboBox(this, ComboPage_Combo, wxEmptyString,
 293                                 wxDefaultPosition, wxDefaultSize,
 294                                 0, NULL,
 295                                 0);
 296     sizerRight->Add(m_combobox, 1, wxGROW | wxALL, 5);
 297     sizerRight->SetMinSize(150, 0);
 298     m_sizerCombo = sizerRight; // save it to modify it later
 299
 300     // the 3 panes panes compose the window
 301     sizerTop->Add(sizerLeft, 0, wxGROW | (wxALL & ~wxLEFT), 10);
 302     sizerTop->Add(sizerMiddle, 1, wxGROW | wxALL, 10);
 303     sizerTop->Add(sizerRight, 1, wxGROW | (wxALL & ~wxRIGHT), 10);
 304
 305     // final initializations
 306     Reset();
 307
 308     SetSizer(sizerTop);
 309
 310     sizerTop->Fit(this);
 311 }
 312
 313 // ----------------------------------------------------------------------------
 314 // operations
 315 // ----------------------------------------------------------------------------
 316
 317 void ComboboxWidgetsPage::Reset()
 318 {
 319     m_chkSort->SetValue(false);
 320     m_chkReadonly->SetValue(false);
 321 }
 322
 323 void ComboboxWidgetsPage::CreateCombo()
 324 {
 325     int flags = 0;
 326
 327     if ( m_chkSort->GetValue() )
 328         flags |= wxCB_SORT;
 329     if ( m_chkReadonly->GetValue() )
 330         flags |= wxCB_READONLY;
 331
 332     switch ( m_radioKind->GetSelection() )
 333     {
 334         default:
 335             wxFAIL_MSG( _T("unknown combo kind") );
 336             // fall through
 337
 338         case ComboKind_Default:
 339             break;
 340
 341         case ComboKind_Simple:
 342             flags |= wxCB_SIMPLE;
 343             break;
 344
 345         case ComboKind_DropDown:
 346             flags = wxCB_DROPDOWN;
 347             break;
 348     }
 349
 350     wxArrayString items;
 351     if ( m_combobox )
 352     {
 353         int count = m_combobox->GetCount();
 354         for ( int n = 0; n < count; n++ )
 355         {
 356             items.Add(m_combobox->GetString(n));
 357         }
 358
 359         m_sizerCombo->Detach( m_combobox );
 360         delete m_combobox;
 361     }
 362
 363     m_combobox = new wxComboBox(this, ComboPage_Combo, wxEmptyString,
 364                                 wxDefaultPosition, wxDefaultSize,
 365                                 0, NULL,
 366                                 flags);
 367
 368     size_t count = items.GetCount();
 369     for ( size_t n = 0; n < count; n++ )
 370     {
 371         m_combobox->Append(items[n]);
 372     }
 373
 374     m_sizerCombo->Add(m_combobox, 1, wxGROW | wxALL, 5);
 375     m_sizerCombo->Layout();
 376 }
 377
 378 // ----------------------------------------------------------------------------
 379 // event handlers
 380 // ----------------------------------------------------------------------------
 381
 382 void ComboboxWidgetsPage::OnButtonReset(wxCommandEvent& WXUNUSED(event))
 383 {
 384     Reset();
 385
 386     CreateCombo();
 387 }
 388
 389 void ComboboxWidgetsPage::OnButtonChange(wxCommandEvent& WXUNUSED(event))
 390 {
 391     int sel = m_combobox->GetSelection();
 392     if ( sel != -1 )
 393     {
 394 #ifndef __WXGTK__
 395         m_combobox->SetString(sel, m_textChange->GetValue());
 396 #else
 397         wxLogMessage(_T("Not implemented in wxGTK"));
 398 #endif
 399     }
 400 }
 401
 402 void ComboboxWidgetsPage::OnButtonDelete(wxCommandEvent& WXUNUSED(event))
 403 {
 404     unsigned long n;
 405     if ( !m_textDelete->GetValue().ToULong(&n) ||
 406             (n >= (unsigned)m_combobox->GetCount()) )
 407     {
 408         return;
 409     }
 410
 411     m_combobox->Delete(n);
 412 }
 413
 414 void ComboboxWidgetsPage::OnButtonDeleteSel(wxCommandEvent& WXUNUSED(event))
 415 {
 416     int sel = m_combobox->GetSelection();
 417     if ( sel != -1 )
 418     {
 419         m_combobox->Delete(sel);
 420     }
 421 }
 422
 423 void ComboboxWidgetsPage::OnButtonClear(wxCommandEvent& WXUNUSED(event))
 424 {
 425     m_combobox->Clear();
 426 }
 427
 428 void ComboboxWidgetsPage::OnButtonInsert(wxCommandEvent& WXUNUSED(event))
 429 {
 430     static unsigned int s_item = 0;
 431
 432     wxString s = m_textInsert->GetValue();
 433     if ( !m_textInsert->IsModified() )
 434     {
 435         // update the default string
 436         m_textInsert->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 437     }
 438
 439     if (m_combobox->GetSelection() >= 0)
 440         m_combobox->Insert(s, m_combobox->GetSelection());
 441 }
 442
 443 void ComboboxWidgetsPage::OnButtonAdd(wxCommandEvent& WXUNUSED(event))
 444 {
 445     static unsigned int s_item = 0;
 446
 447     wxString s = m_textAdd->GetValue();
 448     if ( !m_textAdd->IsModified() )
 449     {
 450         // update the default string
 451         m_textAdd->SetValue(wxString::Format(_T("test item %u"), ++s_item));
 452     }
 453
 454     m_combobox->Append(s);
 455 }
 456
 457 void ComboboxWidgetsPage::OnButtonAddMany(wxCommandEvent& WXUNUSED(event))
 458 {
 459     // "many" means 1000 here
 460     for ( unsigned int n = 0; n < 1000; n++ )
 461     {
 462         m_combobox->Append(wxString::Format(_T("item #%u"), n));
 463     }
 464 }
 465
 466 void ComboboxWidgetsPage::OnButtonAddSeveral(wxCommandEvent& WXUNUSED(event))
 467 {
 468     m_combobox->Append(_T("First"));
 469     m_combobox->Append(_T("another one"));
 470     m_combobox->Append(_T("and the last (very very very very very very very very very very long) one"));
 471 }
 472
 473 void ComboboxWidgetsPage::OnUpdateUICurText(wxUpdateUIEvent& event)
 474 {
 475     if (m_combobox)
 476         event.SetText( wxString::Format(_T("%d"), m_combobox->GetSelection()) );
 477 }
 478
 479 void ComboboxWidgetsPage::OnUpdateUIResetButton(wxUpdateUIEvent& event)
 480 {
 481     if (m_combobox)
 482         event.Enable( m_chkSort->GetValue() || m_chkReadonly->GetValue() );
 483 }
 484
 485 void ComboboxWidgetsPage::OnUpdateUIInsert(wxUpdateUIEvent& event)
 486 {
 487     if (m_combobox)
 488     {
 489         bool enable = !(m_combobox->GetWindowStyle() & wxCB_SORT) &&
 490                        (m_combobox->GetSelection() >= 0);
 491
 492         event.Enable(enable);
 493     }
 494 }
 495
 496 void ComboboxWidgetsPage::OnUpdateUIDeleteButton(wxUpdateUIEvent& event)
 497 {
 498     if (m_combobox)
 499     {
 500       unsigned long n;
 501       event.Enable(m_textDelete->GetValue().ToULong(&n) &&
 502         (n < (unsigned)m_combobox->GetCount()));
 503     }
 504 }
 505
 506 void ComboboxWidgetsPage::OnUpdateUIDeleteSelButton(wxUpdateUIEvent& event)
 507 {
 508     if (m_combobox)
 509         event.Enable(m_combobox->GetSelection() != -1);
 510 }
 511
 512 void ComboboxWidgetsPage::OnUpdateUIClearButton(wxUpdateUIEvent& event)
 513 {
 514     if (m_combobox)
 515         event.Enable(m_combobox->GetCount() != 0);
 516 }
 517
 518 void ComboboxWidgetsPage::OnUpdateUIAddSeveral(wxUpdateUIEvent& event)
 519 {
 520     if (m_combobox)
 521         event.Enable(!(m_combobox->GetWindowStyle() & wxCB_SORT));
 522 }
 523
 524 void ComboboxWidgetsPage::OnComboText(wxCommandEvent& event)
 525 {
 526     if (!m_combobox)
 527         return;
 528
 529     wxString s = event.GetString();
 530
 531     wxASSERT_MSG( s == m_combobox->GetValue(),
 532                   _T("event and combobox values should be the same") );
 533
 534     if (event.GetEventType() == wxEVT_COMMAND_TEXT_ENTER)
 535         wxLogMessage(_T("Combobox enter pressed (now '%s')"), s.c_str());
 536     else
 537     wxLogMessage(_T("Combobox text changed (now '%s')"), s.c_str());
 538 }
 539
 540 void ComboboxWidgetsPage::OnComboBox(wxCommandEvent& event)
 541 {
 542     long sel = event.GetInt();
 543     m_textDelete->SetValue(wxString::Format(_T("%ld"), sel));
 544
 545     wxLogMessage(_T("Combobox item %ld selected"), sel);
 546 }
 547
 548 void ComboboxWidgetsPage::OnCheckOrRadioBox(wxCommandEvent& WXUNUSED(event))
 549 {
 550     CreateCombo();
 551 }
 552
 553 #endif //wxUSE_COMBOBOX
 554
 555 #endif