Source Code for Module pygtk

 1  # -*- Mode: Python; py-indent-offset: 4 -*- 
 2  # pygtk - Python bindings for the GTK+ widget set. 
 3  # Copyright (C) 1998-2002  James Henstridge 
 4  # 
 5  #   pygtk.py: pygtk version selection code. 
 6  # 
 7  # This library is free software; you can redistribute it and/or modify 
 8  # it under the terms of the GNU Lesser General Public License as published by 
 9  # the Free Software Foundation; either version 2.1 of the License, or 
10  # (at your option) any later version. 
11  # 
12  # This library is distributed in the hope that it will be useful, 
13  # but WITHOUT ANY WARRANTY; without even the implied warranty of 
14  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
15  # GNU Lesser General Public License for more details. 
16  # 
17  # You should have received a copy of the GNU Lesser General Public License 
18  # along with this library; if not, write to the Free Software 
19  # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 
20  # USA 
21   
22  import fnmatch 
23  import glob 
24  import os 
25  import os.path 
26  import sys 
27   
28  __all__ = ['require'] 
29   
30  _our_dir = os.path.dirname(os.path.abspath(os.path.normpath(__file__))) 
31  _pygtk_2_0_dir = os.path.normpath('%s/gtk-2.0' % _our_dir) 
32   
33  _pygtk_dir_pat = 'gtk-[0-9].[0-9]' 
34   
35  _pygtk_required_version = None 
36   
37 -def _get_available_versions(): 
38      versions = {} 
39      for dir in sys.path: 
40          if not dir:  
41              dir = os.getcwd() 
42               
43          if not os.path.isdir(dir): 
44              continue 
45           
46          # if the dir is a pygtk dir, skip it 
47          if fnmatch.fnmatchcase(os.path.basename(dir), _pygtk_dir_pat): 
48              continue   
49           
50          for filename in glob.glob(os.path.join(dir, _pygtk_dir_pat)): 
51              pathname = os.path.join(dir, filename) 
52   
53              # skip non directories 
54              if not os.path.isdir(pathname): 
55                  continue 
56               
57              # skip empty directories 
58              if not os.listdir(pathname): 
59                  continue 
60               
61              if not versions.has_key(filename[-3:]): 
62                  versions[filename[-3:]] = pathname 
63      return versions 
64   
65 -def require20(): 
66      if _pygtk_2_0_dir not in sys.path: 
67          sys.path.insert(0, _pygtk_2_0_dir) 
68   
69 -def require(version): 
70      if version == '2.0': 
71          return require20() 
72       
73      global _pygtk_required_version 
74   
75      if _pygtk_required_version != None: 
76          assert _pygtk_required_version == version, \ 
77                 "a different version of gtk was already required" 
78          return 
79   
80      assert not sys.modules.has_key('gtk'), \ 
81             "pygtk.require() must be called before importing gtk" 
82   
83      versions = _get_available_versions() 
84      assert versions.has_key(version), \ 
85             "required version '%s' not found on system" % version 
86   
87      # remove any pygtk dirs first ... 
88      for dir in sys.path: 
89          if fnmatch.fnmatchcase(os.path.basename(dir), _pygtk_dir_pat): 
90              sys.path.remove(dir) 
91   
92      # prepend the pygtk path ... 
93      sys.path.insert(0, versions[version]) 
94       
95      _pygtk_required_version = version 
96