findrox.py

   1 # Most of the common code needed by ROX applications is in ROX-Lib2.
   2 # Except this code, which is needed to find ROX-Lib2 in the first place!
   3
   4 # Just make sure you import findrox before importing anything inside
   5 # ROX-Lib2...
   6
   7 import os, sys
   8 from os.path import exists
   9 import string
  10
  11 try:
  12         path = os.environ['LIBDIRPATH']
  13         paths = string.split(path, ':')
  14 except KeyError:
  15         paths = [ os.environ['HOME'] + '/lib', '/usr/local/lib', '/usr/lib' ]
  16
  17 paths = map(lambda p: os.path.join(p, 'ROX-Lib2'), paths)
  18 for p in paths:
  19         if exists(p):
  20                 sys.path.append(os.path.join(p, 'python'))
  21                 break
  22 else:
  23         err = "This program needs ROX-Lib2 to run.\n" + \
  24                 "I tried all of these places:\n\n" + \
  25                 string.join(paths, '\n') + '\n\n' + \
  26                 "ROX-Lib2 is available from:\nhttp://rox.sourceforge.net"
  27         try:
  28                 sys.stderr.write('*** ' + err + '\n')
  29         except:
  30                 pass
  31         try:
  32                 import pygtk; pygtk.require('2.0')
  33                 import gtk as g
  34         except:
  35                 import gtk
  36                 win = gtk.GtkDialog()
  37                 message = gtk.GtkLabel(err +
  38                                 '\n\nAlso, pygtk2 needs to be present')
  39                 win.set_title('Missing ROX-Lib2')
  40                 win.set_position(gtk.WIN_POS_CENTER)
  41                 message.set_padding(20, 20)
  42                 win.vbox.pack_start(message)
  43
  44                 ok = gtk.GtkButton("OK")
  45                 ok.set_flags(gtk.CAN_DEFAULT)
  46                 win.action_area.pack_start(ok)
  47                 ok.connect('clicked', gtk.mainquit)
  48                 ok.grab_default()
  49
  50                 win.connect('destroy', gtk.mainquit)
  51                 win.show_all()
  52                 gtk.mainloop()
  53         else:
  54                 box = g.MessageDialog(None, g.MESSAGE_ERROR, 0,
  55                                         g.BUTTONS_OK, err)
  56                 box.set_title('Missing ROX-Lib2')
  57                 box.set_position(g.WIN_POS_CENTER)
  58                 box.set_default_response(g.RESPONSE_OK)
  59                 box.run()
  60         sys.exit(1)