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Layout Rules

View Structure

In a user panel, every view draws the main window no matter it is selected from a static navigation tree or dynamically navigated. This is a set of documents to specify APS JS SDK components of a view, layout rules, widget hierarchy, widget base properties, and the ways to load widgets.

Typical Operations

In a screen, users need to perform various operations with objects, for example:

  • Creating objects

  • Updating objects

  • Listing objects and deleting objects in lists

  • Monitoring and processing events that can happen with objects

View Components

With the help of APS JS SDK, the typical view is built from several groups of control elements (controls).

../../../_images/ui-view-structure.png

  • Visual controls are defined and processed by HTML and JS code:

    • The aps/PageContainer control is the root element in a view that contains all visual controls. Only one PageContainer must be defined in the view.

    • Widgets are inserted into the PageContainer. They allow a user to perform all necessary operations with application resources.

  • Navigation controls, presented by the Cancel, Previous, Next, and Submit buttons, can be declared in the application metadata, but processed by the JS code. The JS code makes decision on where to navigate and which other actions to perform preliminary, when a control is activated.

  • Model controls are used for effective management of data in the user browser and for interacting with the APS controller:

    • A Store manages the asynchronous communication with the APS controller. It implements the REST operations: POST, GET, UPDATE, and DELETE.

    • A Model, if bound to a widget, establishes the 2-way synchronization with the widget. If the widget value is changed, it will be synced with the Model. Usually, when navigating to another view, the JS code takes care of syncing the Model with the Store control and saving the data in the APS database.

SDK Interfaces

In accordance with the list of control groups considered above, APS JS SDK provides three groups of API.

  • View API is used for creating and managing visual controls (widgets), for example:

    • aps/Grid allows you to present tables and toolbars. Also it can display tabulated data for which it supports splitting into pages with navigation through them, filtering, sorting, and row selection.

    • Input controls, such as TextBox, Select, Slider, and CheckBox, allow users to enter or select needed data.

    • Output controls, such as aps/ActiveList, aps/Gouge, aps/Message, and aps/ProgressBar, are needed to display output data for users in a convenient way.

  • Model API exposes two objects for managing data:

    • Model is a data model for representing APS resources. It is used for syncing resource properties with widgets.

    • Store is a data store used for communicating with the APS controller.

  • Navigation API implements dynamic navigation between views by means of the following functions:

    • gotoView() switches a screen to the specified view.

    • onSubmit(), onEdit(), onCancel(), and other event handlers are used by the JS code to process activation of different navigation controls.

Widgets

APS JS SDK provides a set of modules for creating and using various visual interface elements of web applications. We mean such elements as an interactive button, slider, toolbar, and progress bar.

Note

For the full description of all APS JS modules refer to the JS Modules reference guide.

Before you start creating your application UI using APS JS widgets, be aware of the following general documents:

Also, for your convenience, we recommend you to get familiar with common widget properties and methods:

Control Panel Specifics

Depending on the user panel type, the view structure varies significantly as specified in the following documents: