Drag to undo/redo a digital ink canvas using a visible history palette
US10229518B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 10, 2017 |
| Grant date | Mar 12, 2019 |
| Priority date | — |
| Expiry date | Apr 10, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2200/24
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques are described to support undo and redo operations in connection with a digital ink canvas on an appliance that can take part in a collaboration amongst multiple appliances that can share content. The digital ink canvas is a digital area that accepts inputs from a user and renders a digital stroke. The described techniques make use of a navigable history palette which includes individual history entries that each provide a visual representation of a state of the digital ink canvas at some point during the collaboration. The history palette provides a navigable user interface instrumentality which permits panning through the history palette to enable user to select a particular visual representation. The digital ink canvas is then returned to the state associated with the selected visual representation. The selected visual representation can be provided across the appliances participating in the virtual collaboration.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.