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      1 // Example for use of GNU gettext.
      2 // Copyright (C) 2006 Free Software Foundation, Inc.
      3 // This file is in the public domain.
      4 
      5 // Source code of the C++ program.
      6 
      7 #include <wx/wx.h>
      8 #include <wx/intl.h>
      9 
     10 /* Get getpid() declaration.  */
     11 #if HAVE_UNISTD_H
     12 # include <unistd.h>
     13 #endif
     14 
     15 class MyApp: public wxApp
     16 {
     17 public:
     18   virtual bool OnInit();
     19 private:
     20   // wxWidgets has the concept of a "current locale". It is the one returned
     21   // by wxGetLocale() and implicitly used by wxGetTranslation.
     22   // But there is no way to explicitly set this current locale! Rather, it is
     23   // always set to the last constructed locale(!), and is modified when a
     24   // locale is destroyed. In such a way that the current locale points to
     25   // invalid memory after you do
     26   //    wxLocale *a = new wxLocale;
     27   //    wxLocale *b = new wxLocale;
     28   //    delete a;
     29   //    delete b;
     30   // So, to avoid problems, we use exactly one instance of wxLocale, and keep
     31   // it alive for the entire application lifetime.
     32   wxLocale appLocale;
     33 };
     34 
     35 class MyFrame: public wxFrame
     36 {
     37 public:
     38   MyFrame();
     39 };
     40 
     41 // This defines the main() function.
     42 IMPLEMENT_APP(MyApp)
     43 
     44 bool MyApp::OnInit()
     45 {
     46   // First, register the base directory where to look up .mo files.
     47   wxLocale::AddCatalogLookupPathPrefix(wxT(LOCALEDIR));
     48   // Second, initialize the locale and set the application-wide message domain.
     49   appLocale.Init();
     50   appLocale.AddCatalog(wxT("hello-c++-wxwidgets"));
     51   // Now wxGetLocale() is initialized appropriately.
     52 
     53   // Then only start building the GUI elements of the application.
     54 
     55   // Create the main frame window.
     56   MyFrame *frame = new MyFrame();
     57 
     58   // Show the frame.
     59   frame->Show(true);
     60   SetTopWindow(frame);
     61 
     62   return true;
     63 }
     64 
     65 MyFrame::MyFrame()
     66   : wxFrame(NULL, wxID_ANY, _T("Hello example"))
     67 {
     68   wxStaticText *label1 =
     69     new wxStaticText(this, wxID_ANY, _("Hello, world!"));
     70 
     71   wxString label2text =
     72     wxString::Format(_("This program is running as process number %d."),
     73                      getpid());
     74   wxStaticText *label2 =
     75     new wxStaticText(this, wxID_ANY, label2text);
     76 
     77   wxBoxSizer *topSizer = new wxBoxSizer(wxVERTICAL);
     78   topSizer->Add(label1);
     79   topSizer->Add(label2);
     80   SetSizer(topSizer);
     81 }
     82