translate wxMessageDialog labels to the language of the current locale (closes #10962)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61319 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/msgdlg.cpp

@@ -30,6 +30,7 @@
 
 #ifndef WX_PRECOMP
     #include "wx/app.h"
+    #include "wx/intl.h"
     #include "wx/utils.h"
     #include "wx/dialog.h"
     #if wxUSE_MSGBOX_HOOK
@@ -445,6 +446,34 @@ int wxMessageDialog::ShowModal()
         m_parent = GetParentForModalDialog();
     HWND hWnd = m_parent ? GetHwndOf(m_parent) : NULL;
 
+#if wxUSE_INTL
+    // native message box always uses the current user locale but the program
+    // may be using a different one and in this case we need to manually
+    // translate the button labels to avoid mismatch between the language of
+    // the message box text and its buttons
+    wxLocale * const loc = wxGetLocale();
+    if ( loc && loc->GetLanguage() != wxLocale::GetSystemLanguage() )
+    {
+        if ( m_dialogStyle & wxYES_NO )
+        {
+            // use the strings with mnemonics here as the native message box
+            // does
+            SetYesNoLabels(_("&Yes"), _("&No"));
+        }
+
+        // we may or not have the Ok/Cancel buttons but either we do have them
+        // or we already made the labels custom because we called
+        // SetYesNoLabels() above so doing this does no harm -- and is
+        // necessary in wxYES_NO | wxCANCEL case
+        //
+        // note that we don't use mnemonics here for consistency with the
+        // native message box (which probably doesn't use them because
+        // Enter/Esc keys can be already used to dismiss the message box
+        // using keyboard)
+        SetOKCancelLabels(_("OK"), _("Cancel"));
+    }
+#endif // wxUSE_INTL
+
     // translate wx style in MSW
     unsigned int msStyle;
     const long wxStyle = GetMessageDialogStyle();