Each element may correspond to an operation or application that may be executed by a user selection. In some examples, the menu elements extend radially outward from the edge of the presence sensing region around the input unit, e.g., the user's finger. The pie menu may be a semicircle displayed at the edge of the presence-sensitive screen that includes multiple, selectable "pie-slice" elements. In response to the gesture, the module of the application may generate a pie menu for display to the user. In one example, a user may perform a horizontal swipe gesture that originates at the boundary of the presence-sensing and non-sensing regions of the output device and ends in the presence-sending region of the output device. For example, a user may perform a touch gesture that originates at the boundary of the non-sensing region of the output device and ends in the presence-sensing region of the output device. The gesture may be a swipe gesture performed at a boundary of the presence-sensing region and non-sensing region of the output device. In one example, an application may include a module that displays a pie menu in response to a gesture. The output device may also display a graphical user interface (GUI) generated by an application. In one example, the perimeter area that includes the non-sensing region may enclose the presence-sensing region. The output device may further include a non-sensing region, e.g., a perimeter area around the presence-sensing region, which may not detect touch gestures. In one example, the output device may include a touch display region that may detect gestures provided by a user.
In one aspect of Google's invention, a computing device may include an output device, e.g., a presence-sensitive screen (touch display), to receive user input. Quickly displaying multiple selectable elements that control application behavior may pose numerous challenges because screen real estate may often be limited on mobile devices such as smartphones and tablet devices. Gestures may be used, for example, to initiate applications or control application behavior.
Smartphones and tablet computers often receive user inputs as gestures performed at or near a presence-sensitive screen. Google's invention generally relates to techniques for displaying and selecting menu items provided by a presence-sensitive (e.g., touchscreen) display. Future Google Operating Systems May Implement a Radial Styled Menu System
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