def _profile_entry_changed(self, widget):
        """Update the command based on the contents of the target and profile
        entries. If the command corresponding to the current profile is not
        blank, use it. Otherwise use the current contents of the command
        entry."""
        profile_name = self.toolbar.get_selected_profile()
        target_string = self.toolbar.get_selected_target()

        cmd_profile = CommandProfile()
        command_string = cmd_profile.get_command(profile_name)
        del(cmd_profile)
        if command_string == "":
            command_string = self.command_toolbar.get_command()

        ops = NmapOptions()
        ops.parse_string(command_string)

        # Use the targets from the command entry, if there are any, otherwise
        # use any targets from the profile.
        targets = split_quoted(target_string)
        if len(targets) > 0:
            ops.target_specs = targets
        else:
            self.toolbar.set_selected_target(join_quoted(ops.target_specs))

        self.set_command_quiet(ops.render_string())

    def _command_entry_changed(self, editable):
        ops = NmapOptions()
        ops.parse_string(self.command_toolbar.get_command())

        # Set the target and profile without propagating the "changed" signal
        # back to the command entry.
        self.set_target_quiet(join_quoted(ops.target_specs))
        self.set_profile_name_quiet("")

    def update_target_profile(self, parsed):
        """Update the "Target" and "Profile" entries based on the contents of a
        parsed scan."""
        command = parsed.get_nmap_command()
        targets = parsed.get_targets()
        profile_name = parsed.get_profile_name()

        self.set_command_quiet(parsed.get_nmap_command() or "")
        self.set_target_quiet(join_quoted(targets))
        self.set_profile_name_quiet(profile_name or "")

    def append(self, option, argument, label):
        opt = label
        ops = NmapOptions()
        if option is not None and option != "":
            if argument:
                ops[option] = argument
            else:
                ops[option] = True
            opt += " (%s)" % join_quoted(ops.render()[1:])

        self.list.append([option, argument, opt])
        self.options.append(option)