Source code for pyface.list_box_model
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# license included in LICENSE.txt and may be redistributed only under
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""" The model for list boxes. """
from traits.api import Event, HasTraits
# Classes for event traits.
[docs]class ListModelEvent(object):
""" Information about list model changes. """
[docs]class ListBoxModel(HasTraits):
""" The model for list boxes. """
# Events ----
#: Fired when the contents of the list have changed.
list_changed = Event()
[docs] def get_item_count(self):
""" Get the number of items in the list.
Returns
-------
item_count : int
The number of items in the list.
"""
raise NotImplementedError()
[docs] def get_item_at(self, index):
""" Returns the item at the specified index.
Parameters
----------
index : int
The index to return the value of.
Returns
-------
label, item : str, any
The user-visible string and model data of the item.
"""
raise NotImplementedError()
[docs] def fire_list_changed(self):
""" Invoke this method when the list has changed. """
self.list_changed = ListModelEvent()