Use signals as they should be used.

Use the emit_signal and register_signal methods to properly set the
signals that CommandLineWidget can emit.

topydo/ui/CommandLineWidget.py

@@ -17,20 +17,19 @@
 import urwid
 
 class CommandLineWidget(urwid.Edit):
-    signals = [
-        'blur',
-        'execute_command',
-    ]
+    def __init__(self, *args, **kwargs):
+        super(CommandLineWidget, self).__init__(*args, **kwargs)
+        urwid.register_signal(CommandLineWidget, ['blur', 'execute_command'])
 
     def clear(self):
         self.set_edit_text(u"")
 
     def _blur(self):
         self.clear()
-        self._emit('blur')
+        urwid.emit_signal(self, 'blur')
 
     def _emit_command(self):
-        self._emit('execute_command', self.edit_text)
+        urwid.emit_signal(self, 'execute_command', self.edit_text)
         self.clear()
 
     def keypress(self, p_size, p_key):

topydo/ui/Main.py

@@ -34,7 +34,7 @@ class UIApplication(CLIApplicationBase):
         self.columns = urwid.Columns([], dividechars=0, min_width=COLUMN_WIDTH)
         self.commandline = CommandLineWidget('topydo> ')
         urwid.connect_signal(self.commandline, 'blur',
-                             lambda _: self._blur_commandline())
+                             self._blur_commandline)
         urwid.connect_signal(self.commandline, 'execute_command',
                              self._execute_input)
 
@@ -52,7 +52,7 @@ class UIApplication(CLIApplicationBase):
             pop_ups=True
         )
 
-    def _execute_input(self, _, p_command):
+    def _execute_input(self, p_command):
         """
         Callback for executing a command that was entered on the command line box.
         """