mingw/share/doc/gettext/examples/hello-c++-wxwidgets/hello.cc

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