Source code for pyface.viewer.default_tree_content_provider

# (C) Copyright 2005-2022 Enthought, Inc., Austin, TX
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# This software is provided without warranty under the terms of the BSD
# license included in LICENSE.txt and may be redistributed only under
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""" The default tree content provider. """

from .tree_content_provider import TreeContentProvider
from .tree_item import TreeItem

[docs]class DefaultTreeContentProvider(TreeContentProvider): """ The default tree content provider. """ # ------------------------------------------------------------------------ # 'TreeContentProvider' interface. # ------------------------------------------------------------------------
[docs] def get_parent(self, item): """ Returns the parent of an item. """ return item.parent
[docs] def get_children(self, item): """ Returns the children of an item. """ return item.children
[docs] def has_children(self, item): """ True iff the item has children. """ return item.has_children
# ------------------------------------------------------------------------ # 'DefaultTreeContentProvider' interface. # ------------------------------------------------------------------------
[docs] def append(self, parent, child): """ Appends 'child' to the 'parent' item. """ return self.insert(parent, len(parent.children), child)
[docs] def insert_before(self, parent, before, child): """ Inserts 'child' into 'parent' item before 'before'. """ index, child = parent.insert_before(before, child) return (index, child)
[docs] def insert(self, parent, index, child): """ Inserts 'child' into the 'parent' item at 'index'. """ parent.insert(index, child) return child
[docs] def remove(self, parent, child): """ Removes 'child' from the 'parent' item. """ parent.remove(child) return child
# ------------------------------------------------------------------------ # Protected interface. # ------------------------------------------------------------------------ def _create_item(self, **kw): """ Creates a new item. """ return TreeItem(**kw)