How to use the common.gajim.config.set function in common

def on_preference_widget_font_set(self, widget, text):
		if widget:
			font = widget.get_font_name()
		else:
			font = ''
		gajim.config.set(text, font)
		self.update_text_font()
		gajim.interface.save_config()

self.xml.get_widget('custom_apps_frame').hide()
			elif widget.get_active() == 1:
				self.xml.get_widget('custom_apps_frame').hide()
				gajim.config.set('openwith', 'open')
			elif widget.get_active() == 2:
				self.xml.get_widget('custom_apps_frame').show()
				gajim.config.set('openwith', 'custom')
		else:
			if widget.get_active() == 4:
				self.xml.get_widget('custom_apps_frame').show()
				gajim.config.set('openwith', 'custom')
			else:
				if widget.get_active() == 0:
					gajim.config.set('autodetect_browser_mailer', True)
				elif widget.get_active() == 1:
					gajim.config.set('openwith', 'gnome-open')
				elif widget.get_active() == 2:
					gajim.config.set('openwith', 'kfmclient exec')
				elif widget.get_active() == 3:
					gajim.config.set('openwith', 'exo-open')
				self.xml.get_widget('custom_apps_frame').hide()
		gajim.interface.save_config()

def on_preference_widget_color_set(self, widget, text):
		color = widget.get_color()
		color_string = gtkgui_helpers.make_color_string(color)
		gajim.config.set(text, color_string)
		self.update_text_tags()
		gajim.interface.save_config()

def deactivate(self):
        gajim.config.set('chat_avatar_height', self.config['old_chat_avatar_height'])

if len(self.xmls) == 1: # only one tab when we asked to remove
			# so destroy window

			# we check and possibly save positions here, because Ctrl+W, Escape
			# etc.. call remove_tab so similar code in delete_event callbacks
			# is not enough
			if gajim.config.get('saveposition'):
				if kind == 'chats':
					x, y = self.window.get_position()
					gajim.config.set('chat-x-position', x)
					gajim.config.set('chat-y-position', y)
					width, height = self.window.get_size()
					gajim.config.set('chat-width', width)
					gajim.config.set('chat-height', height)
				elif kind == 'gc':
					gajim.config.set('gc-hpaned-position', self.hpaned_position)
					x, y = self.window.get_position()
					gajim.config.set('gc-x-position', x)
					gajim.config.set('gc-y-position', y)
					width, height = self.window.get_size()
					gajim.config.set('gc-width', width)
					gajim.config.set('gc-height', height)

			self.window.destroy()
		else:
			if self.nb_unread[jid] > 0:
				self.nb_unread[jid] = 0
				if gajim.interface.systray_enabled:
					gajim.interface.systray.remove_jid(jid, self.account,
						self.get_message_type(jid))
			if self.print_time_timeout_id.has_key(jid):
				gobject.source_remove(self.print_time_timeout_id[jid])

def save_pos(self):
		if gajim.config.get('saveposition'):
			# save the window size and position
			x, y = self.window.get_position()
			gajim.config.set('single-msg-x-position', x)
			gajim.config.set('single-msg-y-position', y)
			width, height = self.window.get_size()
			gajim.config.set('single-msg-width', width)
			gajim.config.set('single-msg-height', height)
			gajim.interface.save_config()

self.update_config_to_01114()
		if old < [0, 11, 1, 5] and new >= [0, 11, 1, 5]:
			self.update_config_to_01115()
		if old < [0, 11, 2, 1] and new >= [0, 11, 2, 1]:
			self.update_config_to_01121()
		if old < [0, 11, 4, 1] and new >= [0, 11, 4, 1]:
			self.update_config_to_01141()
		if old < [0, 11, 4, 2] and new >= [0, 11, 4, 2]:
			self.update_config_to_01142()
		if old < [0, 11, 4, 3] and new >= [0, 11, 4, 3]:
			self.update_config_to_01143()
		if old < [0, 11, 4, 4] and new >= [0, 11, 4, 4]:
			self.update_config_to_01144()

		gajim.logger.init_vars()
		gajim.config.set('version', new_version)

		gajim.capscache.load_from_db()

def on_preference_widget_color_set(self, widget, text):
		color = widget.get_color()
		color_string = gtkgui_helpers.make_color_string(color)
		gajim.config.set(text, color_string)
		self.update_text_tags()
		gajim.interface.save_config()

def on_preference_widget_font_set(self, widget, text):
		if widget:
			font = widget.get_font_name()
		else:
			font = ''
		gajim.config.set(text, font)
		self.update_text_font()
		gajim.interface.save_config()

def on_displayed_chat_states_combobox_changed(self, widget):
		active = widget.get_active()
		if active == 0: # all
			gajim.config.set('displayed_chat_state_notifications', 'all')
		elif active == 1: # only composing
			gajim.config.set('displayed_chat_state_notifications',
				'composing_only')
		else: # disabled
			gajim.config.set('displayed_chat_state_notifications', 'disabled')