/*--------------------------------------------------------------------
    * Function:    anyver_loadlibs
    * Application: common
    * Returns:     t or nil
    * Description: Loads two libraries not generally needed for Photon
    *              widgets, but used by Cogent's CwGraph widget, which is
    *              in the History program.
    *------------------------------------------------------------------*/
   function anyver_loadlibs()
   {
     dyna_add_lib("/usr/cogent/lib/photon_s.dlb");
     dyna_add_lib("/usr/cogent/lib/phwidgets.dlb");
   }
   

   /*--------------------------------------------------------------------
    * Function:    anyver_loadlibs
    * Application: common
    * Returns:     t or nil
    * Description: Not currently used in QNX 6.  A place-holder for 
    *              functionality needed in QNX 4.
    *------------------------------------------------------------------*/
   function anyver_loadlibs()
   {
     nil;
   }
   

The gui_require function is called from within the lib/qnx6.g file, and thus does not need or have a QNX 4 counterpart. It checks the name of the Controller argument passed in the system command in the demo.g program, and loads the GTK or Photon libraries needed. It also checks to make sure the XPhoton program that supports X-Windows in Photon is running, and if not, starts it.

If the Controller or any other program in the Demo is started independently in QNX 6, this function will ensure that the appropriate GUI libraries still get loaded.

   /*--------------------------------------------------------------------
    * Function:    gui_require
    * Application: common
    * Returns:     function
    * Description: Tests for GUI, and chooses GTK or Photon libraries.
    *              Starts XPhoton for GTK if necessary.
    *------------------------------------------------------------------*/
   function gui_require()
   {
     local str_arg = string(car(argv));
     
     if (strstr(str_arg, "gtk") != -1)
       {
         if(system("sin | grep -q XPhoton") != 0)
           system("XPhoton &");
         require("lib/gtk.g");
       }
     else
       require("lib/photon.g");
   }
   
   gui_require();