adapt-contrib-graphic

Graphic is a presentation component bundled with the Adapt framework.

Graphic displays graphic content that has been optimized for various devices. The component swaps out images based upon the device's screen size. These device widths are specified in less/generic.less of the Vanilla theme.

Visit the Graphic wiki for more information about its functionality and for explanations of key properties.

##Installation

As one of Adapt's core components, Graphic is included with the installation of the Adapt framework and the installation of the Adapt authoring tool.

• If Graphic has been uninstalled from the Adapt framework, it may be reinstalled. With the Adapt CLI installed, run the following from the command line:
  adapt install adapt-contrib-graphic

  Alternatively, this component can also be installed by adding the following line of code to the adapt.json file:
  "adapt-contrib-graphic": "*"
  Then running the command:
  adapt install
  (This second method will reinstall all plug-ins listed in adapt.json.)

• If Graphic has been uninstalled from the Adapt authoring tool, it may be reinstalled using the Plug-in Manager.

Settings Overview

The attributes listed below are used in components.json to configure Graphic, and are properly formatted as JSON in example.json. Visit the Graphic wiki for more information about how they appear in the authoring tool.

Attributes

core model attributes: These are inherited by every Adapt component. Read more.

_component (string): This value must be: graphic.

_classes (string): CSS class name to be applied to Graphic’s containing div. The class must be predefined in one of the Less files. Separate multiple classes with a space.

_layout (string): This defines the horizontal position of the component in the block. Acceptable values are full, left or right.

instruction (string): This optional text appears above the component. It is frequently used to guide the learner’s interaction with the component.

_graphic (object): The image that constitutes the component. It contains values for alt, large, and small.

alt (string): This text becomes the image’s alt attribute.

large (string): File name (including path) of the image used with large device width. Path should be relative to the src folder (e.g., course/en/images/origami-menu-two.jpg).

small (string): File name (including path) of the image used with small device width. Path should be relative to the src folder (e.g., course/en/images/origami-menu-two.jpg).

attribution (string): Optional text to be displayed as an attribution. By default it is displayed below the image. Adjust positioning by modifying CSS. Text can contain HTML tags, e.g., Copyright © 2015 by <b>Lukasz 'Severiaan' Grela</b>

Accessibility

• Remember to include an alt attribute for all your images. Screen readers will read aloud alt text content, so leave the alt text empty ("alt": "") if the image does not contribute significant course content.
• If the alt text is left empty, the image will not be included in the tab order. If the component is configured to display title or body text, these will remain keyboard accessible.
• If the alt text is assigned a value, but the component is not being tracked for course completion, assign the class "no-state" to _classes. Adapt's accessibility mode reports to the learner the 'state' of the component, whether it is complete or incomplete. It is not common practice to require interaction with (or 'completion' of) an image for course completion. Indeed, a screen reader needlessly announcing the state of an image may be distracting for the learner. Assigning the built-in class "no-state" prevents this.

Limitations

No known limitations.

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Version number: 2.0.5 Framework versions: 2+
Author / maintainer: Adapt Core Team with contributors
Accessibility support: WAI AA
RTL support: yes
Cross-platform coverage: Chrome, Chrome for Android, Firefox (ESR + latest version), Edge 12, IE 11, IE10, IE9, IE8, IE Mobile 11, Safari iOS 9+10, Safari OS X 9+10, Opera