:orphan:

.. _basic_emit.py:

basic_emit.py
=============

.. code-block:: py
    :linenos:


    """
    Example demonstrating the emitting of events using the emit() method.
    
    The "!" in the event name is to supress a warning for connecting to an
    event that is not known beforehand (i.e. there is no corresponding
    property or emitter).
    """
    
    from flexx import event
    
    class Basic(event.HasEvents):
        
        @event.connect('!foo')
        def on_foo(self, *events):
            print('foo handler called with %i events' % len(events))
        
        @event.connect('!bar')
        def on_bar(self, *events):
            print('bar handler called with %i events' % len(events))
    
    b = Basic()
    
    # Emit dummy events
    b.emit('foo', {})
    b.emit('foo', {})
    b.emit('bar', {})
    b.emit('spam', {})  # we can emit this, but nobody's listening
    
    # Handle events
    event.loop.iter()