Virtual view tree
US7535475B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 1, 2005 |
| Grant date | May 19, 2009 |
| Priority date | — |
| Expiry date | Oct 9, 2026 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2210/61
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A virtual view tree for representing a document. A virtual view tree is maintained by an application, rather than a renderer (e.g., graphics rendering library) called upon by the application to display the document. The view tree is virtual in that nodes need not be created until they are to be displayed. When instructed to display the document, the renderer requests nodes and their attributes. The nodes may be cached while the renderer works on their content, but may be removed from memory anytime thereafter. Only a subset of the virtual view tree's nodes is stored at one time, and only in non-persistent storage. The application includes various APIs for navigating a virtual view tree, describing its attributes and caching its nodes. The APIs may be directly accessible to the renderer or may be invoked by subsystems of the application (e.g., client, tree navigation and caching subsystems).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.