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 };
  86
  87 // language data
  88 static const wxLanguage langIds[] =
  89 {
  90     wxLANGUAGE_DEFAULT,
  91     wxLANGUAGE_FRENCH,
  92     wxLANGUAGE_GERMAN,
  93     wxLANGUAGE_RUSSIAN,
  94     wxLANGUAGE_BULGARIAN,
  95     wxLANGUAGE_CZECH,
  96     wxLANGUAGE_POLISH,
  97     wxLANGUAGE_SWEDISH,
  98 #if wxUSE_UNICODE || defined(__WXMOTIF__)
  99     wxLANGUAGE_JAPANESE,
 100 #endif
 101 #if wxUSE_UNICODE
 102     wxLANGUAGE_GEORGIAN,
 103     wxLANGUAGE_ENGLISH,
 104     wxLANGUAGE_ENGLISH_US,
 105     wxLANGUAGE_ARABIC,
 106     wxLANGUAGE_ARABIC_EGYPT
 107 #endif
 108 };
 109
 110 // note that it makes no sense to translate these strings, they are
 111 // shown before we set the locale anyhow
 112 const wxString langNames[] =
 113 {
 114     _T("System default"),
 115     _T("French"),
 116     _T("German"),
 117     _T("Russian"),
 118     _T("Bulgarian"),
 119     _T("Czech"),
 120     _T("Polish"),
 121     _T("Swedish"),
 122 #if wxUSE_UNICODE || defined(__WXMOTIF__)
 123     _T("Japanese"),
 124 #endif
 125 #if wxUSE_UNICODE
 126     _T("Georgian"),
 127     _T("English"),
 128     _T("English (U.S.)"),
 129     _T("Arabic"),
 130     _T("Arabic (Egypt)")
 131 #endif
 132 };
 133
 134 // the arrays must be in sync
 135 wxCOMPILE_TIME_ASSERT( WXSIZEOF(langNames) == WXSIZEOF(langIds),
 136                        LangArraysMismatch );
 137
 138 // ----------------------------------------------------------------------------
 139 // wxWidgets macros
 140 // ----------------------------------------------------------------------------
 141
 142 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 143     EVT_MENU(wxID_EXIT, MyFrame::OnQuit)
 144     EVT_MENU(wxID_ABOUT, MyFrame::OnAbout)
 145     EVT_MENU(INTERNAT_TEST, MyFrame::OnPlay)
 146     EVT_MENU(wxID_OPEN, MyFrame::OnOpen)
 147     EVT_MENU(INTERNAT_TEST_1, MyFrame::OnTest1)
 148     EVT_MENU(INTERNAT_TEST_2, MyFrame::OnTest2)
 149     EVT_MENU(INTERNAT_TEST_3, MyFrame::OnTest3)
 150 END_EVENT_TABLE()
 151
 152 IMPLEMENT_APP(MyApp)
 153
 154 // ============================================================================
 155 // implementation
 156 // ============================================================================
 157
 158 // ----------------------------------------------------------------------------
 159 // MyApp
 160 // ----------------------------------------------------------------------------
 161
 162 // `Main program' equivalent, creating windows and returning main app frame
 163 bool MyApp::OnInit()
 164 {
 165     long lng = -1;
 166
 167     if ( argc == 2 )
 168     {
 169         // the parameter must be the lang index
 170         wxString tmp(argv[1]);
 171         tmp.ToLong(&lng);
 172     }
 173
 174     if ( lng == -1 )
 175     {
 176         lng = wxGetSingleChoiceIndex
 177               (
 178                 _T("Please choose language:"),
 179                 _T("Language"),
 180                 WXSIZEOF(langNames),
 181                 langNames
 182               );
 183     }
 184
 185     if ( lng != -1 )
 186     {
 187         // don't use wxLOCALE_LOAD_DEFAULT flag so that Init() doesn't return
 188         // false just because it failed to load wxstd catalog
 189         if ( !m_locale.Init(langIds[lng], wxLOCALE_CONV_ENCODING) )
 190         {
 191             wxLogError(_T("This language is not supported by the system."));
 192             return false;
 193         }
 194     }
 195
 196     // normally this wouldn't be necessary as the catalog files would be found
 197     // in the default locations, but when the program is not installed the
 198     // catalogs are in the build directory where we wouldn't find them by
 199     // default
 200     wxLocale::AddCatalogLookupPathPrefix(wxT("."));
 201
 202     // Initialize the catalogs we'll be using
 203     m_locale.AddCatalog(wxT("internat"));
 204
 205     // this catalog is installed in standard location on Linux systems and
 206     // shows that you may make use of the standard message catalogs as well
 207     //
 208     // if it's not installed on your system, it is just silently ignored
 209 #ifdef __LINUX__
 210     {
 211         wxLogNull noLog;
 212         m_locale.AddCatalog(_T("fileutils"));
 213     }
 214 #endif
 215
 216     // Create the main frame window
 217     MyFrame *frame = new MyFrame(m_locale);
 218
 219     // Give it an icon
 220     frame->SetIcon(wxICON(mondrian));
 221
 222     // Make a menubar
 223     wxMenu *file_menu = new wxMenu;
 224     file_menu->Append(wxID_ABOUT, _("&About..."));
 225     file_menu->AppendSeparator();
 226     file_menu->Append(wxID_EXIT, _("E&xit"));
 227
 228     wxMenu *test_menu = new wxMenu;
 229     test_menu->Append(wxID_OPEN, _("&Open bogus file"));
 230     test_menu->Append(INTERNAT_TEST, _("&Play a game"));
 231     test_menu->AppendSeparator();
 232     test_menu->Append(INTERNAT_TEST_1, _("&1 _() (gettext)"));
 233     test_menu->Append(INTERNAT_TEST_2, _("&2 _N() (ngettext)"));
 234     test_menu->Append(INTERNAT_TEST_3, _("&3 wxTRANSLATE() (gettext_noop)"));
 235
 236     wxMenuBar *menu_bar = new wxMenuBar;
 237     menu_bar->Append(file_menu, _("&File"));
 238     menu_bar->Append(test_menu, _("&Test"));
 239     frame->SetMenuBar(menu_bar);
 240
 241     // Show the frame
 242     frame->Show(true);
 243     SetTopWindow(frame);
 244
 245     return true;
 246 }
 247
 248 // ----------------------------------------------------------------------------
 249 // MyFrame
 250 // ----------------------------------------------------------------------------
 251
 252 // main frame constructor
 253 MyFrame::MyFrame(wxLocale& locale)
 254        : wxFrame(NULL,
 255                  wxID_ANY,
 256                  _("International wxWidgets App")),
 257          m_locale(locale)
 258 {
 259     // this demonstrates RTL layout mirroring for Arabic locales
 260     wxSizer *sizer = new wxBoxSizer(wxHORIZONTAL);
 261     sizer->Add(new wxStaticText(this, wxID_ANY, _("First")),
 262                 wxSizerFlags().Border());
 263     sizer->Add(new wxStaticText(this, wxID_ANY, _("Second")),
 264                 wxSizerFlags().Border());
 265     SetSizer(sizer);
 266 }
 267
 268 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
 269 {
 270     Close(true);
 271 }
 272
 273 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 274 {
 275     wxString localeInfo;
 276     wxString locale = m_locale.GetLocale();
 277     wxString sysname = m_locale.GetSysName();
 278     wxString canname = m_locale.GetCanonicalName();
 279
 280     localeInfo.Printf(_("Language: %s\nSystem locale name:\n%s\nCanonical locale name: %s\n"),
 281         locale.c_str(), sysname.c_str(), canname.c_str() );
 282
 283     wxMessageDialog dlg(
 284                         this,
 285                         wxString(_("I18n sample\n(c) 1998, 1999 Vadim Zeitlin and Julian Smart"))
 286                                  + wxT("\n\n")
 287                                  + localeInfo,
 288                                  _("About Internat"),
 289                         wxOK | wxICON_INFORMATION
 290                        );
 291     dlg.ShowModal();
 292 }
 293
 294 void MyFrame::OnPlay(wxCommandEvent& WXUNUSED(event))
 295 {
 296     wxString str = wxGetTextFromUser
 297                    (
 298                     _("Enter your number:"),
 299                     _("Try to guess my number!"),
 300                     wxEmptyString,
 301                     this
 302                    );
 303
 304     if ( str.empty() )
 305     {
 306         // cancelled
 307         return;
 308     }
 309
 310     long num;
 311     if ( !str.ToLong(&num) || num < 0 )
 312     {
 313         str = _("You've probably entered an invalid number.");
 314     }
 315     else if ( num == 9 )
 316     {
 317         // this message is not translated (not in catalog) because we used _T()
 318         // and not _() around it
 319         str = _T("You've found a bug in this program!");
 320     }
 321     else if ( num == 17 )
 322     {
 323         str.clear();
 324
 325         // string must be split in two -- otherwise the translation would't be
 326         // found
 327         str << _("Congratulations! you've won. Here is the magic phrase:")
 328             << _("cannot create fifo `%s'");
 329     }
 330     else
 331     {
 332         // this is a more implicit way to write _() but note that if you use it
 333         // you must ensure that the strings get extracted in the message
 334         // catalog as by default xgettext won't do it (it only knows of _(),
 335         // not wxGetTranslation())
 336         str = wxGetTranslation(_T("Bad luck! try again..."));
 337     }
 338
 339     wxMessageBox(str, _("Result"), wxOK | wxICON_INFORMATION);
 340 }
 341
 342 void MyFrame::OnOpen(wxCommandEvent&)
 343 {
 344     // open a bogus file -- the error message should be also translated if
 345     // you've got wxstd.mo somewhere in the search path
 346     wxFile file(wxT("NOTEXIST.ING"));
 347 }
 348
 349 void MyFrame::OnTest1(wxCommandEvent& WXUNUSED(event))
 350 {
 351     const wxChar* title = _("Testing _() (gettext)");
 352     wxTextEntryDialog d(this, _("Please enter text to translate"),
 353         title, wxTRANSLATE("default value"));
 354     if (d.ShowModal() == wxID_OK)
 355     {
 356         wxString v = d.GetValue();
 357         wxString s(title);
 358         s << _T("\n") << v << _T(" -> ")
 359             << wxGetTranslation(v.c_str()) << _T("\n");
 360         wxMessageBox(s);
 361     }
 362 }
 363
 364 void MyFrame::OnTest2(wxCommandEvent& WXUNUSED(event))
 365 {
 366     const wxChar* title = _("Testing _N() (ngettext)");
 367     wxTextEntryDialog d(this,
 368         _("Please enter range for plural forms of \"n files deleted\" phrase"),
 369         title, _T("0-10"));
 370     if (d.ShowModal() == wxID_OK)
 371     {
 372         int first, last;
 373         wxSscanf(d.GetValue(), _T("%d-%d"), &first, &last);
 374         wxString s(title);
 375         s << _T("\n");
 376         for (int n = first; n <= last; ++n)
 377         {
 378             s << n << _T(" ") <<
 379                 wxPLURAL("file deleted", "files deleted", n) <<
 380                 _T("\n");
 381         }
 382         wxMessageBox(s);
 383     }
 384 }
 385
 386 void MyFrame::OnTest3(wxCommandEvent& WXUNUSED(event))
 387 {
 388     const wxChar* lines[] =
 389     {
 390         wxTRANSLATE("line 1"),
 391         wxTRANSLATE("line 2"),
 392         wxTRANSLATE("line 3"),
 393     };
 394     wxString s(_("Testing wxTRANSLATE() (gettext_noop)"));
 395     s << _T("\n");
 396     for (size_t i = 0; i < WXSIZEOF(lines); ++i)
 397     {
 398         s << lines[i] << _T(" -> ") << wxGetTranslation(lines[i]) << _T("\n");
 399     }
 400     wxMessageBox(s);
 401 }
 402
 403