:orphan:

.. _greeter.py:

greeter.py
==========

.. code-block:: py
    :linenos:


    """
    This example implements a simple class to hold a persons name, and three
    ways to connect a function that will be print a greet when the name is
    changed.
    """
    
    from flexx import event
    
    class Name(event.HasEvents):
        
        @event.prop
        def first_name(self, n='John'):
            return str(n)
        
        @event.prop
        def last_name(self, n='Doe'):
            return str(n)
        
        @event.connect('first_name', 'last_name')
        def greet1(self, *events):
            print('Hello %s %s' % (self.first_name, self.last_name))
    
    
    name = Name()
    
    # Connect a function using a decorator
    @name.connect('first_name', 'last_name')
    def greet2(*events):
        print('Hi %s %s' % (name.first_name, name.last_name))
    
    # Connect a function using the classic approach
    def greet3(*events):
        print('Heya %s %s' % (name.first_name, name.last_name))
    name.connect(greet3, 'first_name', 'last_name')
    
    
    name.first_name = 'Jane'
    
    event.loop.iter()