Abstract: Scenes of objects, such as models in three-dimensional environments and user interface elements in window-based computing environments, are often rendered with shadows cast by a first object on a second object based on a light source. Full graphics engines often produce rich and high-fidelity shadows but involve extensive computation that may be unsuitable for some lower-powered devices. Simple shadowing techniques, such as drop shadows, may be rendered with modest computational processing, but only within significant restrictions and with poor fidelity. Presented herein is a shadow rendering technique that involves identifying a silhouette cast by an object due to a light source and applying a geometric transform, based upon the positions of the objects and the light source within the scene. The shadows may further include variations for opacity and/or edge blurring, reflecting distances between the light source and the objects, and colored shadows that exhibit translucency as a stained-glass effect.

Abstract: A pointer tool in a touch-screen display is disclosed. The method includes activating a pointer tool in a touch screen display in response to contact with an area of the touch screen and persisting the displaying of the pointer tool in the touch screen display after the contact with the touch screen is removed. Once editing data is received, the pointer tool is removed from the touch screen display.

Abstract: A pointer tool in a touch-screen display is disclosed. The method includes activating a pointer tool in a touch screen display in response to contact with an area of the touch screen and persisting the displaying of the pointer tool in the touch screen display after the contact with the touch screen is removed. Once editing data is received, the pointer tool is removed from the touch screen display.

Abstract: A numbering scheme is disclosed for implementation in the context of an application display. A user is able to select an item on the display by speaking a number corresponding to a desired control item. In some cases, the screen can include so many numbers that the user loses context and is unable to identify which number they want to select. For this reason, in one embodiment, a temporal switching mechanism is implemented wherein periodic switches (e.g., second-long intervals) occur between showing numbered items and showing a non-numbered screen. In one embodiment, an optional secondary confirmation step is implemented wherein the user sees only the item they just selected and has the chance to (a) learn the programmatic name of the item they selected and/or (b) either confirm and proceed with their selection, or cancel. In one embodiment, the optional secondary confirmation step is omitted if the user speaks a number followed by a predetermined command word.