Nevron Open Vision Documentation
User Interface / UI Elements / UI Elements Hierarchy
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    UI Elements Hierarchy
    In This Topic

    The following image illustrates the class hierarchy that the NOV UI Windows and Widgets use.

    UI Elements Hierarchy

    Following is a brief overview of features and services each type of node defines:

    NNode - base for all types of DOM nodes. Performs core hierarchical management. See Nodes for more info.

    NDocumentNode - base for all nodes that reside in a document. Adds support for history. See Documents for more info.

    NElement - base for all elements that define the main content of a document. Adds support for expressions, styling and inheritance and core support for measure and arrange. See Expressions, Styling and Inheritance and Measure and Arrange.

    NVisual - an element that can be a part of the visual tree and provides callbacks for pre and post children painting, transform and clip management etc. See The Visual Tree for more info.

    NInputElement - adds support for core user input, cursor, tooltip, interactions and commanding. See Input Elements for more info.

    NBoxElement - adds support for measure and arrange and the box model. See Box Elements for more info.

    NWidget - base class for all widgets, that are box elements that reside in windows. See Widget Elements for more info.

    NWindow - base class for top-level and child windows that are the NOV UI communication points with the integration platform - see Windows and The Desktop for more info.