Make it possible for the user to select which graphical sudo application to use.

Make any external apps not installed on the system unselectable in the GUI.
Rework the app selection code in the backend to fall back to auto-selection if a requested app isn't installed.
Tweak the autoconnect attempt throttle in wicd-monitor to not be as aggressive.
Made sure the preferences dialog would reconnect to dbus when a DaemonStarting signal was sent.

wicd/misc.py

@@ -29,26 +29,40 @@ from commands import getoutput
 # wicd imports
 import wpath
 
-if __name__ == '__main__':
-    wpath.chdir(__file__)
-    
+# Connection state constants
 NOT_CONNECTED = 0
 CONNECTING = 1
 WIRELESS = 2
 WIRED = 3
 SUSPENDED = 4
 
+# Automatic app selection constant
 AUTO = 0
+
+# DHCP Clients
 DHCLIENT = 1
 DHCPCD = 2
 PUMP = 3
 
+# Link detection tools
 ETHTOOL = 1
 MIITOOL = 2
 
+# Route flushing tools
 IP = 1
 ROUTE = 2
 
+# Graphical sudo apps
+GKSUDO = 1
+KDESU = 2
+KTSUSS = 3
+sudo_dict = { 
+    AUTO : "",
+    GKSUDO : "gksudo",
+    KDESU : "kdesu",
+    KTSUSS: "ktsuss",
+}
+
 class WicdError(Exception):
     pass
     
@@ -375,9 +389,9 @@ def detect_desktop_environment():
             pass
     return desktop_environment
 
-def get_sudo_cmd(msg):
+def get_sudo_cmd(msg, prog_num=0):
     """ Returns a graphical sudo command for generic use. """
-    sudo_prog = choose_sudo_prog()
+    sudo_prog = choose_sudo_prog(prog_num)
     if not sudo_prog: return None
     if re.search("(ktsuss|gksu|gksudo)$", sudo_prog):
         msg_flag = "-m"
@@ -385,8 +399,10 @@ def get_sudo_cmd(msg):
         msg_flag = "--caption"
     return [sudo_prog, msg_flag, msg]
 
-def choose_sudo_prog():
+def choose_sudo_prog(prog_num=0):
     """ Try to intelligently decide which graphical sudo program to use. """
+    if prog_num:
+        return find_path(sudo_dict[prog_num])
     desktop_env = detect_desktop_environment()
     env_path = os.environ['PATH'].split(":")
     
@@ -412,7 +428,10 @@ def find_path(cmd):
     the file can not be found.
     
     """
-    paths = os.getenv("PATH", default="/usr/bin:/usr/local/bin").split(':')
+    paths = os.getenv("PATH").split(':')
+    if not paths:
+        paths = ["/usr/local/sbin", "/usr/local/bin", "/usr/sbin", "/usr/bin",
+                 "/sbin", "/bin"]
     for path in paths:
         if os.path.exists(os.path.join(path, cmd)):
             return os.path.join(path, cmd)