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#------------------------------------------------------------------------------
# Copyright (c) 2005, Enthought, Inc.
# All rights reserved.
#
# This software is provided without warranty under the terms of the BSD
# license included in enthought/LICENSE.txt and may be redistributed only
# under the conditions described in the aforementioned license. The license
# is also available online at http://www.enthought.com/licenses/BSD.txt
# Thanks for using Enthought open source!
#
# Author: Enthought, Inc.
# Description: <Enthought pyface package component>
#------------------------------------------------------------------------------
""" A file system tree. """
# Standard library imports.
from os import listdir
from os.path import basename, isdir, join
# Enthought library imports.
from pyface.api import ImageResource
from pyface.tree.api import Tree, TreeModel
from traits.api import Instance
class FileTreeModel(TreeModel):
""" A tree model for local file systems. """
# The image used to represent folders that are NOT expanded.
CLOSED_FOLDER = ImageResource('closed_folder')
# The image used to represent folders that ARE expanded.
OPEN_FOLDER = ImageResource('open_folder')
# The image used to represent documents (ie. NON-'folder') nodes.
DOCUMENT = ImageResource('document')
#########################################################################
# 'TreeModel' interface.
#########################################################################
def get_children(self, node):
""" Returns the children of a node. """
return [join(node, filename) for filename in listdir(node)]
def has_children(self, node):
""" Returns True if a node has children, otherwise False. """
if isdir(node):
has_children = len(listdir(node)) > 0
else:
has_children = False
return has_children
def get_image(self, node, selected, expanded):
""" Returns the label image for a node. """
if isdir(node):
if expanded:
image = self.OPEN_FOLDER
else:
image = self.CLOSED_FOLDER
else:
image = self.DOCUMENT
return image
def get_text(self, node):
""" Returns the label text for a node. """
return basename(node)
class FileTree(Tree):
""" A file system tree. """
#### 'Tree' interface #####################################################
# The model that provides the data for the tree.
model = Instance(FileTreeModel, ())
##### EOF #####################################################################