Doxygen: created Group to document drivers, disabled by default

Uncomment `ENABLED_SECTIONS += DriverDev` in documentation/Doxyfile.in
to enable driver documentation.

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.4@12968 ea41ed52-d2ee-0310-a9c1-e6b18d33e121

src/drivers/PostScript/Fl_PostScript.cxx

@@ -29,6 +29,12 @@
 
 const char *Fl_PostScript_File_Device::file_chooser_title = "Select a .ps file";
 
+/**
+ * @cond DriverDev
+ * @addtogroup DriverDeveloper
+ * @{
+ */
+
 /**
  @brief The constructor.
  */
@@ -48,6 +54,12 @@ Fl_PostScript_Graphics_Driver::~Fl_PostScript_Graphics_Driver() {
   if(ps_filename_) free(ps_filename_);
 }
 
+/**
+ * @}
+ * @endcond
+ */
+
+
 Fl_PostScript_File_Device::Fl_PostScript_File_Device(void)
 {
   Fl_Surface_Device::driver( new Fl_PostScript_Graphics_Driver() );
@@ -107,6 +119,12 @@ Fl_PostScript_File_Device::~Fl_PostScript_File_Device() {
   if (ps) delete ps;
 }
 
+/**
+ * @cond DriverDev
+ * @addtogroup DriverDeveloper
+ * @{
+ */
+
 int Fl_PostScript_Graphics_Driver::clocale_printf(const char *format, ...)
 {
   va_list args;
@@ -116,8 +134,6 @@ int Fl_PostScript_Graphics_Driver::clocale_printf(const char *format, ...)
   return retval;
 }
 
-#ifndef FL_DOXYGEN
-
 //  Prolog string 
 
 static const char * prolog =
@@ -1477,7 +1493,10 @@ void Fl_PostScript_File_Device::end_job (void)
   Fl_Display_Device::display_device()->set_current();
 }
 
-#endif // FL_DOXYGEN
+/**
+ * @}
+ * @endcond
+ */
 
 #endif // !defined(FL_NO_PRINT_SUPPORT)