Abstract: Described is a layout system and process for user interface elements of computer programs. The layout system generally refers to a protocol and associated API that enables sizes and positions to be allotted, in which user interface elements are rendered. The layout system may be split between a core layout system and a framework layout system. The core provides minimal policy/rules that are imposed to allow flexibility for a given framework implementation. The framework adds support for user-specified sizing, positioning, margins, minimum sizes, maximum sizes and specific layout elements. Parent elements (e.g., containers) direct measure calls and arrange calls to child elements. The layout system essentially intercepts those calls and depending on policy may manipulate the properties of those calls for sizing, positioning, alignment and the like to ensure uniform and consistent layout results.

Abstract: System, method and API for scrolling in a GUI. Scroll-able content to be displayed in a viewport can include information to control parameters used in scrolling. These parameters can include one or more of the following: the size of the viewport that can be scrolled; whether the content can be scrolled vertically and/or horizontally; the amount of un-rendered content (i.e., content not visible in the “scrollable” viewport) to be prepared for rendering (de-virtualized), etc. The system can include a first object to handle information regarding the content to be displayed in the “scrollable” viewport and a second object to handle user input of the GUI and provide it to the first object.

Abstract: Described is a layout system and process for user interface elements of computer programs. The layout system generally refers to a protocol and associated API that enables sizes and positions to be allotted, in which user interface elements are rendered. The layout system may be split between a core layout system and a framework layout system. The core provides minimal policy/rules that are imposed to allow flexibility for a given framework implementation. The framework adds support for user-specified sizing, positioning, margins, minimum sizes, maximum sizes and specific layout elements. Parent elements (e.g., containers) direct measure calls and arrange calls to child elements. The layout system essentially intercepts those calls and depending on policy may manipulate the properties of those calls for sizing, positioning, alignment and the like to ensure uniform and consistent layout results.

Abstract: Methods and systems are provided for preparing for presentation a graphical element in a computer application program. The methods independently execute measurement and arrangement procedures. A data structure, sets of executable procedures, and computer-readable media are also provided for facilitating the preparation for presentation of a graphical element.

Abstract: A presenter system framework and methods performed by such framework are described for hosting a set of presenters that facilitate maintaining layouts for application views assigned a set of graphical elements. The presenter system provides a base presenter class and a set of interface methods, performed by a presentation engine, for creating and integrating an extensible set of presenter classes for handling various graphical element data types during a layout operation within a specified view. The presenter system enables application user interface developers to implement complex display layout operations through calls to the presentation engine. Examples of such complex display layout operations include: pagination, partial calculation, incremental calculation, multiple tries, chaining of layout features/operations.