Linux で PyGTK と X11 を使用する場合、Pidgin の機能に基づいて、次のようなことができます。
import ctypes
import ctypes.util
import platform
class XScreenSaverInfo(ctypes.Structure):
_fields_ = [('window', ctypes.c_long),
('state', ctypes.c_int),
('kind', ctypes.c_int),
('til_or_since', ctypes.c_ulong),
('idle', ctypes.c_ulong),
('eventMask', ctypes.c_ulong)]
class IdleXScreenSaver(object):
def __init__(self):
self.xss = self._get_library('Xss')
self.gdk = self._get_library('gdk-x11-2.0')
self.gdk.gdk_display_get_default.restype = ctypes.c_void_p
# GDK_DISPLAY_XDISPLAY expands to gdk_x11_display_get_xdisplay
self.gdk.gdk_x11_display_get_xdisplay.restype = ctypes.c_void_p
self.gdk.gdk_x11_display_get_xdisplay.argtypes = [ctypes.c_void_p]
# GDK_ROOT_WINDOW expands to gdk_x11_get_default_root_xwindow
self.gdk.gdk_x11_get_default_root_xwindow.restype = ctypes.c_void_p
self.xss.XScreenSaverAllocInfo.restype = ctypes.POINTER(XScreenSaverInfo)
self.xss.XScreenSaverQueryExtension.restype = ctypes.c_int
self.xss.XScreenSaverQueryExtension.argtypes = [ctypes.c_void_p,
ctypes.POINTER(ctypes.c_int),
ctypes.POINTER(ctypes.c_int)]
self.xss.XScreenSaverQueryInfo.restype = ctypes.c_int
self.xss.XScreenSaverQueryInfo.argtypes = [ctypes.c_void_p,
ctypes.c_void_p,
ctypes.POINTER(XScreenSaverInfo)]
# gtk_init() must have been called for this to work
import gtk
gtk # pyflakes
# has_extension = XScreenSaverQueryExtension(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
# &event_base, &error_base);
event_base = ctypes.c_int()
error_base = ctypes.c_int()
gtk_display = self.gdk.gdk_display_get_default()
self.dpy = self.gdk.gdk_x11_display_get_xdisplay(gtk_display)
available = self.xss.XScreenSaverQueryExtension(self.dpy,
ctypes.byref(event_base),
ctypes.byref(error_base))
if available == 1:
self.xss_info = self.xss.XScreenSaverAllocInfo()
else:
self.xss_info = None
def _get_library(self, libname):
path = ctypes.util.find_library(libname)
if not path:
raise ImportError('Could not find library "%s"' % (libname, ))
lib = ctypes.cdll.LoadLibrary(path)
assert lib
return lib
def get_idle(self):
if not self.xss_info:
return 0
# XScreenSaverQueryInfo(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
# GDK_ROOT_WINDOW(), mit_info);
drawable = self.gdk.gdk_x11_get_default_root_xwindow()
self.xss.XScreenSaverQueryInfo(self.dpy, drawable, self.xss_info)
# return (mit_info->idle) / 1000;
return self.xss_info.contents.idle / 1000
上記の例では、ctypes を介して gdk を使用して、X11 固有にアクセスできるようにしています。Xscreensaver API にも ctypes 経由でアクセスする必要があります。
PyGI とイントロスペクションを使用するように移植するのはかなり簡単なはずです。