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 // NOTE: don't miss the "readme.txt" file which comes with this sample!
  13
  14
  15
  16 // ============================================================================
  17 // declarations
  18 // ============================================================================
  19
  20 // ----------------------------------------------------------------------------
  21 // headers
  22 // ----------------------------------------------------------------------------
  23
  24 // For compilers that support precompilation, includes "wx/wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28 #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/wx.h"
  33 #endif
  34
  35 #include "wx/intl.h"
  36 #include "wx/file.h"
  37 #include "wx/log.h"
  38 #include "wx/cmdline.h"
  39
  40 #if defined(__WXGTK__) || defined(__WXX11__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__)
  41 #include "mondrian.xpm"
  42 #endif
  43
  44 // ----------------------------------------------------------------------------
  45 // private classes
  46 // ----------------------------------------------------------------------------
  47
  48 // Define a new application type
  49 class MyApp: public wxApp
  50 {
  51 public:
  52     MyApp() { m_lang = wxLANGUAGE_UNKNOWN; }
  53
  54     virtual void OnInitCmdLine(wxCmdLineParser& parser);
  55     virtual bool OnCmdLineParsed(wxCmdLineParser& parser);
  56     virtual bool OnInit();
  57
  58 protected:
  59     wxLanguage m_lang;  // language specified by user
  60     wxLocale m_locale;  // locale we'll be using
  61 };
  62
  63 // Define a new frame type
  64 class MyFrame: public wxFrame
  65 {
  66 public:
  67     MyFrame(wxLocale& m_locale);
  68
  69 public:
  70     void OnTestLocaleAvail(wxCommandEvent& event);
  71     void OnAbout(wxCommandEvent& event);
  72     void OnQuit(wxCommandEvent& event);
  73
  74     void OnPlay(wxCommandEvent& event);
  75     void OnOpen(wxCommandEvent& event);
  76     void OnTest1(wxCommandEvent& event);
  77     void OnTest2(wxCommandEvent& event);
  78     void OnTest3(wxCommandEvent& event);
  79     void OnTestMsgBox(wxCommandEvent& event);
  80
  81     DECLARE_EVENT_TABLE()
  82
  83     wxLocale& m_locale;
  84 };
  85
  86 // ----------------------------------------------------------------------------
  87 // constants
  88 // ----------------------------------------------------------------------------
  89
  90 // ID for the menu commands
  91 enum
  92 {
  93     INTERNAT_TEST = wxID_HIGHEST + 1,
  94     INTERNAT_PLAY,
  95     INTERNAT_TEST_1,
  96     INTERNAT_TEST_2,
  97     INTERNAT_TEST_3,
  98     INTERNAT_TEST_MSGBOX
  99 };
 100
 101 // language data
 102 static const wxLanguage langIds[] =
 103 {
 104     wxLANGUAGE_DEFAULT,
 105     wxLANGUAGE_FRENCH,
 106     wxLANGUAGE_ITALIAN,
 107     wxLANGUAGE_GERMAN,
 108     wxLANGUAGE_RUSSIAN,
 109     wxLANGUAGE_BULGARIAN,
 110     wxLANGUAGE_CZECH,
 111     wxLANGUAGE_POLISH,
 112     wxLANGUAGE_SWEDISH,
 113 #if wxUSE_UNICODE || defined(__WXMOTIF__)
 114     wxLANGUAGE_JAPANESE,
 115 #endif
 116 #if wxUSE_UNICODE
 117     wxLANGUAGE_GEORGIAN,
 118     wxLANGUAGE_ENGLISH,
 119     wxLANGUAGE_ENGLISH_US,
 120     wxLANGUAGE_ARABIC,
 121     wxLANGUAGE_ARABIC_EGYPT
 122 #endif
 123 };
 124
 125 // note that it makes no sense to translate these strings, they are
 126 // shown before we set the locale anyhow
 127 const wxString langNames[] =
 128 {
 129     "System default",
 130     "French",
 131     "Italian",
 132     "German",
 133     "Russian",
 134     "Bulgarian",
 135     "Czech",
 136     "Polish",
 137     "Swedish",
 138 #if wxUSE_UNICODE || defined(__WXMOTIF__)
 139     "Japanese",
 140 #endif
 141 #if wxUSE_UNICODE
 142     "Georgian",
 143     "English",
 144     "English (U.S.)",
 145     "Arabic",
 146     "Arabic (Egypt)"
 147 #endif
 148 };
 149
 150 // the arrays must be in sync
 151 wxCOMPILE_TIME_ASSERT( WXSIZEOF(langNames) == WXSIZEOF(langIds),
 152                        LangArraysMismatch );
 153
 154 // ----------------------------------------------------------------------------
 155 // wxWidgets macros
 156 // ----------------------------------------------------------------------------
 157
 158 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 159     EVT_MENU(INTERNAT_TEST, MyFrame::OnTestLocaleAvail)
 160     EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
 161     EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
 162
 163     EVT_MENU(INTERNAT_PLAY, MyFrame::OnPlay)
 164     EVT_MENU(wxID_OPEN, MyFrame::OnOpen)
 165     EVT_MENU(INTERNAT_TEST_1, MyFrame::OnTest1)
 166     EVT_MENU(INTERNAT_TEST_2, MyFrame::OnTest2)
 167     EVT_MENU(INTERNAT_TEST_3, MyFrame::OnTest3)
 168     EVT_MENU(INTERNAT_TEST_MSGBOX, MyFrame::OnTestMsgBox)
 169 END_EVENT_TABLE()
 170
 171 IMPLEMENT_APP(MyApp)
 172
 173 // ============================================================================
 174 // implementation
 175 // ============================================================================
 176
 177 // ----------------------------------------------------------------------------
 178 // MyApp
 179 // ----------------------------------------------------------------------------
 180
 181 // command line arguments handling
 182 void MyApp::OnInitCmdLine(wxCmdLineParser& parser)
 183 {
 184     parser.AddParam(_("locale"),
 185                     wxCMD_LINE_VAL_STRING,
 186                     wxCMD_LINE_PARAM_OPTIONAL);
 187
 188     wxApp::OnInitCmdLine(parser);
 189 }
 190
 191 bool MyApp::OnCmdLineParsed(wxCmdLineParser& parser)
 192 {
 193     if ( !wxApp::OnCmdLineParsed(parser) )
 194         return false;
 195
 196     if ( parser.GetParamCount() )
 197     {
 198         const wxString loc = parser.GetParam();
 199         const wxLanguageInfo * const lang = wxLocale::FindLanguageInfo(loc);
 200         if ( !lang )
 201         {
 202             wxLogError(_("Locale \"%s\" is unknown."), loc);
 203             return false;
 204         }
 205
 206         m_lang = static_cast<wxLanguage>(lang->Language);
 207     }
 208
 209     return true;
 210 }
 211
 212 // `Main program' equivalent, creating windows and returning main app frame
 213 bool MyApp::OnInit()
 214 {
 215     if ( !wxApp::OnInit() )
 216         return false;
 217
 218     if ( m_lang == wxLANGUAGE_UNKNOWN )
 219     {
 220         int lng = wxGetSingleChoiceIndex
 221                   (
 222                     _("Please choose language:"),
 223                     _("Language"),
 224                     WXSIZEOF(langNames),
 225                     langNames
 226                   );
 227         m_lang = lng == -1 ? wxLANGUAGE_DEFAULT : langIds[lng];
 228     }
 229
 230     // don't use wxLOCALE_LOAD_DEFAULT flag so that Init() doesn't return
 231     // false just because it failed to load wxstd catalog
 232     if ( !m_locale.Init(m_lang, wxLOCALE_CONV_ENCODING) )
 233     {
 234         wxLogWarning(_("This language is not supported by the system."));
 235
 236         // continue nevertheless
 237     }
 238
 239     // normally this wouldn't be necessary as the catalog files would be found
 240     // in the default locations, but when the program is not installed the
 241     // catalogs are in the build directory where we wouldn't find them by
 242     // default
 243     wxLocale::AddCatalogLookupPathPrefix(".");
 244
 245     // Initialize the catalogs we'll be using
 246     const wxLanguageInfo* pInfo = wxLocale::GetLanguageInfo(m_lang);
 247     if (!m_locale.AddCatalog("internat"))
 248     {
 249         wxLogError(_("Couldn't find/load the 'internat' catalog for locale '%s'."),
 250                    pInfo ? pInfo->GetLocaleName() : _("unknown"));
 251     }
 252
 253     // Now try to add wxstd.mo so that loading "NOTEXIST.ING" file will produce
 254     // a localized error message:
 255     m_locale.AddCatalog("wxstd.mo");
 256         // NOTE: it's not an error if we couldn't find it!
 257
 258     // this catalog is installed in standard location on Linux systems and
 259     // shows that you may make use of the standard message catalogs as well
 260     //
 261     // if it's not installed on your system, it is just silently ignored
 262 #ifdef __LINUX__
 263     {
 264         wxLogNull noLog;
 265         m_locale.AddCatalog("fileutils");
 266     }
 267 #endif
 268
 269     // Create the main frame window
 270     MyFrame *frame = new MyFrame(m_locale);
 271
 272     // Show the frame
 273     frame->Show(true);
 274     SetTopWindow(frame);
 275
 276     return true;
 277 }
 278
 279 // ----------------------------------------------------------------------------
 280 // MyFrame
 281 // ----------------------------------------------------------------------------
 282
 283 // main frame constructor
 284 MyFrame::MyFrame(wxLocale& locale)
 285        : wxFrame(NULL,
 286                  wxID_ANY,
 287                  _("International wxWidgets App")),
 288          m_locale(locale)
 289 {
 290     SetIcon(wxICON(mondrian));
 291
 292     // Make a menubar
 293     wxMenu *file_menu = new wxMenu;
 294     file_menu->Append(INTERNAT_TEST, _("&Test locale availability...\tCtrl-T"));
 295     file_menu->AppendSeparator();
 296
 297     // since wxID_ABOUT and wxID_EXIT are stock IDs they will automatically get
 298     // translated help strings; nice isn't it?
 299     file_menu->Append(wxID_ABOUT, _("&About..."));
 300     file_menu->AppendSeparator();
 301     file_menu->Append(wxID_EXIT, _("E&xit"));
 302
 303     wxMenu *test_menu = new wxMenu;
 304     test_menu->Append(wxID_OPEN, _("&Open bogus file"), _("Shows a wxWidgets localized error message"));
 305     test_menu->Append(INTERNAT_PLAY, _("&Play a game"), _("A little game; hint: 17 is a lucky number for many"));
 306     test_menu->AppendSeparator();
 307     test_menu->Append(INTERNAT_TEST_1, _("&1 _() (gettext)"), _("Tests the _() macro"));
 308     test_menu->Append(INTERNAT_TEST_2, _("&2 _N() (ngettext)"), _("Tests the _N() macro"));
 309     test_menu->Append(INTERNAT_TEST_3, _("&3 wxTRANSLATE() (gettext_noop)"), _("Tests the wxTRANSLATE() macro"));
 310     test_menu->Append(INTERNAT_TEST_MSGBOX, _("&Message box test"),
 311                       _("Tests message box buttons labels translation"));
 312
 313     wxMenuBar *menu_bar = new wxMenuBar;
 314     menu_bar->Append(file_menu, _("&File"));
 315     menu_bar->Append(test_menu, _("&Test"));
 316     SetMenuBar(menu_bar);
 317
 318     // this demonstrates RTL support in wxStatusBar:
 319     CreateStatusBar(1);
 320
 321     // this demonstrates RTL layout mirroring for Arabic locales
 322     wxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
 323     sizer->Add(new wxStaticText(this, wxID_ANY, _("First")),
 324                 wxSizerFlags().Border());
 325     sizer->Add(new wxStaticText(this, wxID_ANY, _("Second")),
 326                 wxSizerFlags().Border());
 327     SetSizer(sizer);
 328 }
 329
 330 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
 331 {
 332     Close(true);
 333 }
 334
 335 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 336 {
 337     wxString localeInfo;
 338     wxString locale = m_locale.GetLocale();
 339     wxString sysname = m_locale.GetSysName();
 340     wxString canname = m_locale.GetCanonicalName();
 341
 342     localeInfo.Printf(_("Language: %s\nSystem locale name: %s\nCanonical locale name: %s\n"),
 343                       locale.c_str(), sysname.c_str(), canname.c_str() );
 344
 345     wxMessageDialog dlg(
 346                         this,
 347                         wxString(_("I18n sample\n(c) 1998, 1999 Vadim Zeitlin and Julian Smart"))
 348                                  + "\n\n"
 349                                  + localeInfo,
 350                                  _("About Internat"),
 351                         wxOK | wxICON_INFORMATION
 352                        );
 353     dlg.ShowModal();
 354 }
 355
 356 void MyFrame::OnPlay(wxCommandEvent& WXUNUSED(event))
 357 {
 358     wxString str = wxGetTextFromUser
 359                    (
 360                     _("Enter your number:"),
 361                     _("Try to guess my number!"),
 362                     wxEmptyString,
 363                     this
 364                    );
 365
 366     if ( str.empty() )
 367     {
 368         // cancelled
 369         return;
 370     }
 371
 372     long num;
 373     if ( !str.ToLong(&num) || num < 0 )
 374     {
 375         str = _("You've probably entered an invalid number.");
 376     }
 377     else if ( num == 9 )
 378     {
 379         // this message is not translated (not in catalog) because we used wxT()
 380         // and not _() around it
 381         str = wxT("You've found a bug in this program!");
 382     }
 383     else if ( num == 17 )
 384     {
 385         str.clear();
 386
 387         // string must be split in two -- otherwise the translation would't be
 388         // found
 389         str << _("Congratulations! you've won. Here is the magic phrase:")
 390             << _("cannot create fifo `%s'");
 391     }
 392     else
 393     {
 394         // this is a more implicit way to write _() but note that if you use it
 395         // you must ensure that the strings get extracted in the message
 396         // catalog as by default xgettext won't do it; it only knows of _(),
 397         // not of wxTRANSLATE(). As internat's readme.txt says you should thus
 398         // call xgettext with -kwxTRANSLATE.
 399         str = wxGetTranslation(wxTRANSLATE("Bad luck! try again..."));
 400
 401         // note also that if we want 'str' to contain a localized string
 402         // we need to use wxGetTranslation explicitely as wxTRANSLATE just
 403         // tells xgettext to extract the string but has no effect on the
 404         // runtime of the program!
 405     }
 406
 407     wxMessageBox(str, _("Result"), wxOK | wxICON_INFORMATION);
 408 }
 409
 410 void MyFrame::OnTestLocaleAvail(wxCommandEvent& WXUNUSED(event))
 411 {
 412     static wxString s_locale;
 413     wxString locale = wxGetTextFromUser
 414                       (
 415                         _("Enter the locale to test"),
 416                         wxGetTextFromUserPromptStr,
 417                         s_locale,
 418                         this
 419                       );
 420     if ( locale.empty() )
 421         return;
 422
 423     s_locale = locale;
 424     const wxLanguageInfo * const info = wxLocale::FindLanguageInfo(s_locale);
 425     if ( !info )
 426     {
 427         wxLogError(_("Locale \"%s\" is unknown."), s_locale.c_str());
 428         return;
 429     }
 430
 431     if ( wxLocale::IsAvailable(info->Language) )
 432     {
 433         wxLogMessage(_("Locale \"%s\" is available."), s_locale.c_str());
 434     }
 435     else
 436     {
 437         wxLogWarning(_("Locale \"%s\" is not available."), s_locale.c_str());
 438     }
 439 }
 440
 441 void MyFrame::OnOpen(wxCommandEvent& WXUNUSED(event))
 442 {
 443     // open a bogus file -- the error message should be also translated if
 444     // you've got wxstd.mo somewhere in the search path (see MyApp::OnInit)
 445     wxFile file("NOTEXIST.ING");
 446 }
 447
 448 void MyFrame::OnTest1(wxCommandEvent& WXUNUSED(event))
 449 {
 450     const wxString& title = _("Testing _() (gettext)");
 451
 452     // NOTE: using the wxTRANSLATE() macro here we won't show a localized
 453     //       string in the text entry dialog; we'll simply show the un-translated
 454     //       string; however if the user press "ok" without altering the text,
 455     //       since the "default value" string has been extracted by xgettext
 456     //       the wxGetTranslation call later will manage to return a localized
 457     //       string
 458     wxTextEntryDialog d(this, _("Please enter text to translate"),
 459                         title, wxTRANSLATE("default value"));
 460
 461     if (d.ShowModal() == wxID_OK)
 462     {
 463         wxString v = d.GetValue();
 464         wxString s(title);
 465         s << "\n" << v << " -> "
 466             << wxGetTranslation(v.c_str()) << "\n";
 467         wxMessageBox(s);
 468     }
 469 }
 470
 471 void MyFrame::OnTest2(wxCommandEvent& WXUNUSED(event))
 472 {
 473     const wxString& title = _("Testing _N() (ngettext)");
 474     wxTextEntryDialog d(this,
 475         _("Please enter range for plural forms of \"n files deleted\" phrase"),
 476         title, "0-10");
 477
 478     if (d.ShowModal() == wxID_OK)
 479     {
 480         int first, last;
 481         wxSscanf(d.GetValue(), "%d-%d", &first, &last);
 482         wxString s(title);
 483         s << "\n";
 484         for (int n = first; n <= last; ++n)
 485         {
 486             s << n << " " <<
 487                 wxPLURAL("file deleted", "files deleted", n) <<
 488                 "\n";
 489         }
 490         wxMessageBox(s);
 491     }
 492 }
 493
 494 void MyFrame::OnTest3(wxCommandEvent& WXUNUSED(event))
 495 {
 496     const char* lines[] =
 497     {
 498         wxTRANSLATE("line 1"),
 499         wxTRANSLATE("line 2"),
 500         wxTRANSLATE("line 3"),
 501     };
 502
 503     wxString s(_("Testing wxTRANSLATE() (gettext_noop)"));
 504     s << "\n";
 505     for (size_t i = 0; i < WXSIZEOF(lines); ++i)
 506     {
 507         s << lines[i] << " -> " << wxGetTranslation(lines[i]) << "\n";
 508     }
 509     wxMessageBox(s);
 510 }
 511
 512 void MyFrame::OnTestMsgBox(wxCommandEvent& WXUNUSED(event))
 513 {
 514     if ( wxMessageBox
 515          (
 516             _("Are the labels of the buttons in this message box "
 517               "translated into the current locale language?"),
 518             _("wxWidgets i18n sample"),
 519             wxYES_NO,
 520             this
 521          ) != wxYES )
 522     {
 523         wxMessageBox(_("Please report the details of your platform to us."));
 524     }
 525 }