Method for managing keyboard navigation within a tree control structure user interface component via a linked list
US7844637B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2007 |
| Grant date | Nov 30, 2010 |
| Priority date | — |
| Expiry date | Jan 29, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0482
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method, data processing system and computer program product for maintaining/updating managing keyboard navigation using a linked list. In particular, a Dynamic Tree Control Linkage (DTCL) utility creates a doubly linked list with list nodes having assigned values based on a tree control structure UI component. Each list node of the doubly linked list corresponds to a visible tree item of the tree structure UI component. Responding to a keyboard event signal, the DTCL utility finds a current list node corresponding to a first current tree item. The DTCL utility finds a next (i.e. previous or subsequent) list node corresponding to a next tree item. The DTCL utility detects a list node exists. The DTCL utility detects whether the next list node is associated with a null value. When the next list node is associated with a non-null value, the next tree item is identified. The DTCL utility returns an identification of the next tree item representing a second current tree item. The DTCL utility also updates the doubly linked list in response to the expansion/collapsion of the current list item. The DTCL utility avoids the need to number all tree items (both visible and hidden tree items…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.