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src/share/examples/services-example.py

 

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#!/usr/bin/env python

 

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# This is an example of accessing the new ScreenletService. It can be used

 

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# to access signals and methods within a Screenlet from other applications or

 

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# other Screenlets.

 

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# import services-module

 

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import screenlets.services

 

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# check for Clock-service

 

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if not screenlets.services.service_is_running('Clock'):

 

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        print "Clock-service not found. Pleaselaunch the ClockScreenlet first."

 

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else:

 

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        # get general interface for this screenlet

 

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        service_iface = screenlets.services.get_service_by_name('Clock')

 

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        # get interface to the ClockScreenlet's custom service (we need to

 

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        # pass the special interface for the Clock's additonal methods here)

 

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        clock_iface =  screenlets.services.get_service_by_name('Clock', 

 

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                interface='org.screenlets.Clock')

 

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        # if interface was returned, 

 

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        if service_iface:

 

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                try:

 

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                        # get list with instance ids

 

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                        ids = service_iface.list_instances()

 

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                        for id in ids:

 

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                                print id

 

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                        # id of first instance

 

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                        instance_id = ids[0]

 

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                        # + METHDODS: remote-calling of methods in a Screenlet

 

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                        # call testing functions

 

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                        service_iface.debug('Hello World!')

 

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                        service_iface.test()

 

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                        # set options

 

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                        #clock.set(instance_id, 'theme_name', 'tango')

 

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                        service_iface.set(instance_id, 'x', 700)

 

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                        service_iface.set(instance_id, 'y', 500)

 

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                        # add a new instance

 

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                        service_iface.add('myClock')

 

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                        service_iface.set('myClock', 'scale', 3.5)

 

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                        service_iface.set('myClock', 'theme_name', 'tango')

 

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                        # if clock service is available

 

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                        if clock:

 

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                                # call special function of the ClockService

 

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                                #clock.debug('TEST')

 

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                                print clock_iface.get_time(instance_id)

 

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                                print clock_iface.get_date(instance_id)

 

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                        # + SIGNALS: connecting to signals in a screenlet

 

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                        def handle_alarm (instance_id):

 

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                                print "Signal received: Clock '%s' raised alarm." % (instance_id)

 

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                        clock_iface.connect_to_signal('alarm_start', handle_alarm)

 

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                        # start mainloop (needed to receive events)

 

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                        import gobject

 

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                        mainloop = gobject.MainLoop()

 

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                        mainloop.run()

 

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                except Exception, e:

 

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                        print "Error: " + str(e)

 

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