Person Example

person_view.enaml

#------------------------------------------------------------------------------
#  Copyright (c) 2011, Enthought, Inc.
#  All rights reserved.
#------------------------------------------------------------------------------
from enaml.widgets.api import Window, Label, Field, Form
from enaml.stdlib.fields import IntField


enamldef PersonForm(Form):
    attr person
    Label:
        text = 'First Name'
    Field:
        text := person.first_name
    Label:
        text = 'Last Name'
    Field:
        text := person.last_name
    Label:
        text = 'Age'
    IntField:
        minimum = 0
        value := person.age


enamldef PersonView(Window):
    attr person
    PersonForm:
        person := parent.person

person.py

#------------------------------------------------------------------------------
#  Copyright (c) 2011, Enthought, Inc.
#  All rights reserved.
#------------------------------------------------------------------------------
from traits.api import HasTraits, Str, Range, Bool, on_trait_change

import enaml
from enaml.stdlib.sessions import simple_session
from enaml.qt.qt_application import QtApplication


class Person(HasTraits):
    """ A simple class representing a person object.

    """
    last_name = Str

    first_name = Str

    age = Range(low=0)

    debug = Bool(False)

    @on_trait_change('age')
    def debug_print(self):
        """ Prints out a debug message whenever the person's age changes.

        """
        if self.debug:
            templ = "{first} {last} is {age} years old."
            s = templ.format(
                first=self.first_name, last=self.last_name, age=self.age,
            )
            print s


if __name__ == '__main__':
    with enaml.imports():
        from person_view import PersonView

    john = Person(first_name='John', last_name='Doe', age=42)
    john.debug = True

    session = simple_session(
        'john', 'A view of the Person john', PersonView, person=john
    )

    app = QtApplication([session])
    app.start_session('john')
    app.start()

$ python person.py