samples/internat/internat.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        internat.cpp
   3 // Purpose:     Demonstrates internationalisation (i18n) support
   4 // Author:      Vadim Zeitlin/Julian Smart
   5 // Modified by:
   6 // Created:     04/01/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     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 #ifndef WX_PRECOMP
  28 #include "wx/wx.h"
  29 #endif
  30
  31 #include "wx/intl.h"
  32 #include "wx/file.h"
  33 #include "wx/log.h"
  34
  35 #if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__)
  36 #include "mondrian.xpm"
  37 #endif
  38
  39 // ----------------------------------------------------------------------------
  40 // private classes
  41 // ----------------------------------------------------------------------------
  42
  43 // Define a new application type
  44 class MyApp: public wxApp
  45 {
  46 public:
  47     virtual bool OnInit();
  48
  49 protected:
  50     wxLocale m_locale; // locale we'll be using
  51 };
  52
  53 // Define a new frame type
  54 class MyFrame: public wxFrame
  55 {
  56 public:
  57     MyFrame(wxLocale& m_locale);
  58
  59 public:
  60     void OnQuit(wxCommandEvent& event);
  61     void OnAbout(wxCommandEvent& event);
  62     void OnPlay(wxCommandEvent& event);
  63     void OnOpen(wxCommandEvent& event);
  64     void OnTest1(wxCommandEvent& event);
  65     void OnTest2(wxCommandEvent& event);
  66     void OnTest3(wxCommandEvent& event);
  67
  68     DECLARE_EVENT_TABLE()
  69
  70     wxLocale& m_locale;
  71 };
  72
  73 // ----------------------------------------------------------------------------
  74 // constants
  75 // ----------------------------------------------------------------------------
  76
  77 // ID for the menu commands
  78 enum
  79 {
  80     INTERNAT_TEXT = wxID_HIGHEST + 1,
  81     INTERNAT_TEST,
  82     INTERNAT_TEST_1,
  83     INTERNAT_TEST_2,
  84     INTERNAT_TEST_3,
  85     INTERNAT_OPEN
  86 };
  87
  88 // language data
  89 static const wxLanguage langIds[] =
  90 {
  91     wxLANGUAGE_DEFAULT,
  92     wxLANGUAGE_FRENCH,
  93     wxLANGUAGE_GERMAN,
  94     wxLANGUAGE_RUSSIAN,
  95     wxLANGUAGE_BULGARIAN,
  96     wxLANGUAGE_CZECH,
  97     wxLANGUAGE_POLISH,
  98     wxLANGUAGE_SWEDISH,
  99 #if wxUSE_UNICODE || defined(__WXMOTIF__)
 100     wxLANGUAGE_JAPANESE,
 101 #endif
 102 #if wxUSE_UNICODE
 103     wxLANGUAGE_GEORGIAN,
 104     wxLANGUAGE_ENGLISH,
 105     wxLANGUAGE_ENGLISH_US
 106 #endif
 107 };
 108
 109 // note that it makes no sense to translate these strings, they are
 110 // shown before we set the locale anyhow
 111 const wxString langNames[] =
 112 {
 113     _T("System default"),
 114     _T("French"),
 115     _T("German"),
 116     _T("Russian"),
 117     _T("Bulgarian"),
 118     _T("Czech"),
 119     _T("Polish"),
 120     _T("Swedish"),
 121 #if wxUSE_UNICODE || defined(__WXMOTIF__)
 122     _T("Japanese"),
 123 #endif
 124 #if wxUSE_UNICODE
 125     _T("Georgian"),
 126     _T("English"),
 127     _T("English (U.S.)")
 128 #endif
 129 };
 130
 131 // the arrays must be in sync
 132 wxCOMPILE_TIME_ASSERT( WXSIZEOF(langNames) == WXSIZEOF(langIds),
 133                        LangArraysMismatch );
 134
 135 // ----------------------------------------------------------------------------
 136 // wxWidgets macros
 137 // ----------------------------------------------------------------------------
 138
 139 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 140     EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
 141     EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
 142     EVT_MENU(INTERNAT_TEST, MyFrame::OnPlay)
 143     EVT_MENU(INTERNAT_OPEN, MyFrame::OnOpen)
 144     EVT_MENU(INTERNAT_TEST_1, MyFrame::OnTest1)
 145     EVT_MENU(INTERNAT_TEST_2, MyFrame::OnTest2)
 146     EVT_MENU(INTERNAT_TEST_3, MyFrame::OnTest3)
 147 END_EVENT_TABLE()
 148
 149 IMPLEMENT_APP(MyApp)
 150
 151 // ============================================================================
 152 // implementation
 153 // ============================================================================
 154
 155 // ----------------------------------------------------------------------------
 156 // MyApp
 157 // ----------------------------------------------------------------------------
 158
 159 // `Main program' equivalent, creating windows and returning main app frame
 160 bool MyApp::OnInit()
 161 {
 162     long lng = -1;
 163
 164     if ( argc == 2 )
 165     {
 166         // the parameter must be the lang index
 167         wxString tmp(argv[1]);
 168         tmp.ToLong(&lng);
 169     }
 170
 171     if ( lng == -1 )
 172     {
 173         lng = wxGetSingleChoiceIndex
 174               (
 175                 _T("Please choose language:"),
 176                 _T("Language"),
 177                 WXSIZEOF(langNames),
 178                 langNames
 179               );
 180     }
 181
 182     if ( lng != -1 )
 183     {
 184         // don't use wxLOCALE_LOAD_DEFAULT flag so that Init() doesn't return
 185         // false just because it failed to load wxstd catalog
 186         if ( !m_locale.Init(langIds[lng], wxLOCALE_CONV_ENCODING) )
 187         {
 188             wxLogError(_T("This language is not supported by the system."));
 189             return false;
 190         }
 191     }
 192
 193     // normally this wouldn't be necessary as the catalog files would be found
 194     // in the default locations, but when the program is not installed the
 195     // catalogs are in the build directory where we wouldn't find them by
 196     // default
 197     wxLocale::AddCatalogLookupPathPrefix(wxT("."));
 198
 199     // Initialize the catalogs we'll be using
 200     m_locale.AddCatalog(wxT("internat"));
 201
 202     // this catalog is installed in standard location on Linux systems and
 203     // shows that you may make use of the standard message catalogs as well
 204     //
 205     // if it's not installed on your system, it is just silently ignored
 206 #ifdef __LINUX__
 207     {
 208         wxLogNull noLog;
 209         m_locale.AddCatalog(_T("fileutils"));
 210     }
 211 #endif
 212
 213     // Create the main frame window
 214     MyFrame *frame = new MyFrame(m_locale);
 215
 216     // Give it an icon
 217     frame->SetIcon(wxICON(mondrian));
 218
 219     // Make a menubar
 220     wxMenu *file_menu = new wxMenu;
 221     file_menu->Append(wxID_ABOUT, _("&About..."));
 222     file_menu->AppendSeparator();
 223     file_menu->Append(wxID_EXIT, _("E&xit"));
 224
 225     wxMenu *test_menu = new wxMenu;
 226     test_menu->Append(INTERNAT_OPEN, _("&Open bogus file"));
 227     test_menu->Append(INTERNAT_TEST, _("&Play a game"));
 228     test_menu->AppendSeparator();
 229     test_menu->Append(INTERNAT_TEST_1, _("&1 _() (gettext)"));
 230     test_menu->Append(INTERNAT_TEST_2, _("&2 _N() (ngettext)"));
 231     test_menu->Append(INTERNAT_TEST_3, _("&3 wxTRANSLATE() (gettext_noop)"));
 232
 233     wxMenuBar *menu_bar = new wxMenuBar;
 234     menu_bar->Append(file_menu, _("&File"));
 235     menu_bar->Append(test_menu, _("&Test"));
 236     frame->SetMenuBar(menu_bar);
 237
 238     // Show the frame
 239     frame->Show(true);
 240     SetTopWindow(frame);
 241
 242     return true;
 243 }
 244
 245 // ----------------------------------------------------------------------------
 246 // MyFrame
 247 // ----------------------------------------------------------------------------
 248
 249 // main frame constructor
 250 MyFrame::MyFrame(wxLocale& locale)
 251        : wxFrame(NULL,
 252                  wxID_ANY,
 253                  _("International wxWidgets App")),
 254          m_locale(locale)
 255 {
 256     // Empty
 257 }
 258
 259 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
 260 {
 261     Close(true);
 262 }
 263
 264 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 265 {
 266     wxString localeInfo;
 267     wxString locale = m_locale.GetLocale();
 268     wxString sysname = m_locale.GetSysName();
 269     wxString canname = m_locale.GetCanonicalName();
 270
 271     localeInfo.Printf(_("Language: %s\nSystem locale name:\n%s\nCanonical locale name: %s\n"),
 272         locale.c_str(), sysname.c_str(), canname.c_str() );
 273
 274     wxMessageDialog dlg(
 275                         this,
 276                         wxString(_("I18n sample\n(c) 1998, 1999 Vadim Zeitlin and Julian Smart"))
 277                                  + wxT("\n\n")
 278                                  + localeInfo,
 279                                  _("About Internat"),
 280                         wxOK | wxICON_INFORMATION
 281                        );
 282     dlg.ShowModal();
 283 }
 284
 285 void MyFrame::OnPlay(wxCommandEvent& WXUNUSED(event))
 286 {
 287     wxString str = wxGetTextFromUser
 288                    (
 289                     _("Enter your number:"),
 290                     _("Try to guess my number!"),
 291                     wxEmptyString,
 292                     this
 293                    );
 294
 295     if ( str.empty() )
 296     {
 297         // cancelled
 298         return;
 299     }
 300
 301     long num;
 302     if ( !str.ToLong(&num) || num < 0 )
 303     {
 304         str = _("You've probably entered an invalid number.");
 305     }
 306     else if ( num == 9 )
 307     {
 308         // this message is not translated (not in catalog) because we used _T()
 309         // and not _() around it
 310         str = _T("You've found a bug in this program!");
 311     }
 312     else if ( num == 17 )
 313     {
 314         str.clear();
 315
 316         // string must be split in two -- otherwise the translation would't be
 317         // found
 318         str << _("Congratulations! you've won. Here is the magic phrase:")
 319             << _("cannot create fifo `%s'");
 320     }
 321     else
 322     {
 323         // this is a more implicit way to write _() but note that if you use it
 324         // you must ensure that the strings get extracted in the message
 325         // catalog as by default xgettext won't do it (it only knows of _(),
 326         // not wxGetTranslation())
 327         str = wxGetTranslation(_T("Bad luck! try again..."));
 328     }
 329
 330     wxMessageBox(str, _("Result"), wxOK | wxICON_INFORMATION);
 331 }
 332
 333 void MyFrame::OnOpen(wxCommandEvent&)
 334 {
 335     // open a bogus file -- the error message should be also translated if
 336     // you've got wxstd.mo somewhere in the search path
 337     wxFile file(wxT("NOTEXIST.ING"));
 338 }
 339
 340 void MyFrame::OnTest1(wxCommandEvent& WXUNUSED(event))
 341 {
 342     const wxChar* title = _("Testing _() (gettext)");
 343     wxTextEntryDialog d(this, _("Please enter text to translate"),
 344         title, wxTRANSLATE("default value"));
 345     if (d.ShowModal() == wxID_OK)
 346     {
 347         wxString v = d.GetValue();
 348         wxString s(title);
 349         s << _T("\n") << v << _T(" -> ")
 350             << wxGetTranslation(v.c_str()) << _T("\n");
 351         wxMessageBox(s);
 352     }
 353 }
 354
 355 void MyFrame::OnTest2(wxCommandEvent& WXUNUSED(event))
 356 {
 357     const wxChar* title = _("Testing _N() (ngettext)");
 358     wxTextEntryDialog d(this,
 359         _("Please enter range for plural forms of \"n files deleted\" phrase"),
 360         title, _T("0-10"));
 361     if (d.ShowModal() == wxID_OK)
 362     {
 363         int first, last;
 364         wxSscanf(d.GetValue(), _T("%d-%d"), &first, &last);
 365         wxString s(title);
 366         s << _T("\n");
 367         for (int n = first; n <= last; ++n)
 368         {
 369             s << n << _T(" ") <<
 370                 wxPLURAL("file deleted", "files deleted", n) <<
 371                 _T("\n");
 372         }
 373         wxMessageBox(s);
 374     }
 375 }
 376
 377 void MyFrame::OnTest3(wxCommandEvent& WXUNUSED(event))
 378 {
 379     const wxChar* lines[] =
 380     {
 381         wxTRANSLATE("line 1"),
 382         wxTRANSLATE("line 2"),
 383         wxTRANSLATE("line 3"),
 384     };
 385     wxString s(_("Testing wxTRANSLATE() (gettext_noop)"));
 386     s << _T("\n");
 387     for (size_t i = 0; i < WXSIZEOF(lines); ++i)
 388     {
 389         s << lines[i] << _T(" -> ") << wxGetTranslation(lines[i]) << _T("\n");
 390     }
 391     wxMessageBox(s);
 392 }
 393
 394