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module com {  module sun {  module star {  module awt {  module tree {


/** An instance of this interface is used by the TreeControl to
    get notifications about data model changes.

    <p>Usually you must not implement this interface yourself as it is already handled
    by the TreeControl, but you must notify it correctly if
    you implement the XTreeDataModel yourself</p>.
 */
interface XTreeDataModelListener: com::sun::star::lang::XEventListener
{
    /** Invoked after a node (or a set of siblings) has changed in some way.
        The node(s) have not changed locations in the tree or altered their
        children arrays, but other attributes have changed and may affect
        presentation.

        Example: the name of a file has changed, but it is in the same location in the file system.

        To indicate the root has changed, TreeDataModelEvent::Nodes will contain
        the root node and TreeDataModelEvent::ParentNode will be empty.
    */
    void treeNodesChanged( [in] TreeDataModelEvent Event );

    /** Invoked after nodes have been inserted into the tree.

        Use TreeDataModelEvent::ParentNode to get the parent of the new node(s).
        TreeDataModelEvent::Nodes contains the new node(s).
    */
    void treeNodesInserted( [in] TreeDataModelEvent Event );

    /** Invoked after nodes have been removed from the tree.
        <p>Note that if a subtree is removed from the tree,
        this method may only be invoked once for the root of the removed subtree,
        not once for each individual set of siblings removed.

        Use TreeDataModelEvent::ParentNode to get the former parent of the deleted node(s).
        TreeDataModelEvent::Nodes contains the removed node(s).
    */
    void treeNodesRemoved( [in] TreeDataModelEvent Event );

    /** Invoked after the tree has drastically changed structure from a given node down.

        Use TreeDataModelEvent::ParentNode to get the node which
        structure has changed. TreeDataModelEvent::Nodes is empty.
    */
    void treeStructureChanged( [in] TreeDataModelEvent Event );
};


}; }; }; }; };

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