Data processing apparatus and method for rendering tree structure

Abstract

An apparatus ( 20 ) and method ( 10 ) for rendering a tree structure in a GUI based on the position of a pointing cursor relative to the rendered tree uses the tree-related cursor position to control which tree branches are automatically expanded / collapsed. They reconfigure the tree view for compact rendering without requiring explicit expand / collapse operations. Generates (11) a tree view. A cursor position is determined (14) relative to the view including the first and second position values ​​according to the first and second directions. The branch aligned with the cursor position according to the first direction is automatically selected as the active branch (15). Determining (16) the sub-level of the active branch to expand based on the second position value of the indent relative to the sub-level of the active branch, and by expanding the determined sub-level of the active branch and collapsing the other branches (17) Automatically update the tree view.

Description

technical field [0001] A data processing device and a computer-implemented method for rendering a tree structure of elements are presented. In particular, the present disclosure relates to a data processing device and computer-implemented method for rendering a tree structure of elements in a graphical user interface according to the position of a pointing cursor relative to the rendered tree structure, and to corresponding computer-readable storage media. Background technique [0002] Concepts for semantic metadata annotation of eg multimedia data are often arranged according to a hierarchical super-concept / sub-concept scheme, leading to concept taxonomies. For example, a vehicle classification system may include the sub-concepts Ground Vehicle, Watercraft, Aircraft, etc., while Ground Vehicle further includes sub-concepts such as Car, Truck, Bus, etc. In a classification system, any subconcept is a class of all its superconcepts. Therefore, if a specific concept to be an...

AI Technical Summary

Problems solved by technology

[0006] For small taxonomies, the GUI of an application using the taxonomy can contain a table view, but the table view may have difficulty handling the large number of hierarchical levels of a large taxonomy properly, resulting in the need to update the table view frequently or quickly show sub-tables

On the other hand, in some applications, manually configurable tree views are used for large taxonomy systems, but they lack convenience due to the problem of the number of view reconfiguration operations required for compact views

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