ui-macos: move the noLatencyControl setting to a per-connection setting.

I think some connections you'll want to optimize for latency, and others for
bandwidth.  Probably.

Also, use a dropdown box instead of a checkbox; that way we can make it more
clear what each of the settings means.

While we're here, adjust all the anchor settings for the different display
items so that resizing the dialog box works sensibly.

ui-macos/main.py

@@ -136,7 +136,7 @@ class SshuttleController(NSObject):
     prefsWindow = objc.IBOutlet()
     serversController = objc.IBOutlet()
     logField = objc.IBOutlet()
-    noLatencyControlField = objc.IBOutlet()
+    latencyControlField = objc.IBOutlet()
     
     servers = []
     conns = {}
@@ -162,14 +162,14 @@ class SshuttleController(NSObject):
             manual_nets = ['0/0']
         else:
             manual_nets = []
+        noLatencyControl = (server.latencyControl() != models.LAT_INTERACTIVE)
         conn = Runner(sshuttle_args(host,
                                     auto_nets = nets_mode == models.NET_AUTO,
                                     auto_hosts = server.autoHosts(),
                                     dns = server.useDns(),
                                     nets = manual_nets,
                                     debug = self.debugField.state(),
-                                    no_latency_control 
-                                       = self.noLatencyControlField.state()),
+                                    no_latency_control = noLatencyControl),
                       logfunc=logfunc, promptfunc=promptfunc,
                       serverobj=server)
         self.conns[host] = conn
@@ -286,12 +286,14 @@ class SshuttleController(NSObject):
             autoNets = s.get('autoNets', models.NET_AUTO)
             autoHosts = s.get('autoHosts', True)
             useDns = s.get('useDns', autoNets == models.NET_ALL)
+            latencyControl = s.get('latencyControl', models.LAT_INTERACTIVE)
             srv = models.SshuttleServer.alloc().init()
             srv.setHost_(host)
             srv.setAutoNets_(autoNets)
             srv.setAutoHosts_(autoHosts)
             srv.setNets_(nl)
             srv.setUseDns_(useDns)
+            srv.setLatencyControl_(latencyControl)
             sl.append(srv)
         self.serversController.addObjects_(sl)
         self.serversController.setSelectionIndex_(0)
@@ -310,7 +312,8 @@ class SshuttleController(NSObject):
                      nets=nets,
                      autoNets=s.autoNets(),
                      autoHosts=s.autoHosts(),
-                     useDns=s.useDns())
+                     useDns=s.useDns(),
+                     latencyControl=s.latencyControl())
             l.append(d)
         my.Defaults().setObject_forKey_(l, 'servers')
         self.fill_menu()
@@ -322,6 +325,11 @@ class SshuttleController(NSObject):
         tf('Determine automatically')
         tf('Custom...')
 
+        self.latencyControlField.removeAllItems()
+        tf = self.latencyControlField.addItemWithTitle_
+        tf('Fast transfer')
+        tf('Low latency')
+
         # Hmm, even when I mark this as !enabled in the .nib, it still comes
         # through as enabled.  So let's just disable it here (since we don't
         # support this feature yet).

ui-macos/models.py

@@ -58,6 +58,9 @@ NET_ALL = 0
 NET_AUTO = 1
 NET_MANUAL = 2
 
+LAT_BANDWIDTH = 0
+LAT_INTERACTIVE = 1
+
 class SshuttleServer(NSObject):
     def init(self):
         self = super(SshuttleServer, self).init()
@@ -155,3 +158,9 @@ class SshuttleServer(NSObject):
     def setUseDns_(self, v):
         self._k_useDns = v
         config_changed()
+
+    def latencyControl(self):
+        return getattr(self, '_k_latencyControl', LAT_INTERACTIVE)
+    def setLatencyControl_(self, v):
+        self._k_latencyControl = v
+        config_changed()