Scroll-zoom bar
Primarily for usage in timelines, a scroll-zoom bar lets a user scroll or zoom with the same control.
Anatomy#
Options#
Size#
Scroll-zoom bars come in three different sizes: small, medium, and large. The medium size is the default and most frequently used option. Use the other sizes sparingly; they should be used to create a hierarchy of importance within the page.
Orientation#
Scroll-zoom bars can be either horizontal or vertical in orientation.
Hide track#
A scroll-zoom bar can float above an area, and the track can be hidden.
Hide handles#
The handles of a scroll-zoom bar can be hidden whenever a user is not directly interacting with the component.
Scale down#
Regardless of its size, a scroll-zoom bar can be minimized to 4 px wide (on desktop) or 5 px wide (on mobile) when a user is not interacting with it. If scaling down, the handles should also disappear.
Detached#
By default, a scroll-zoom bar is attached to the bottom and sides of a page or area. It can also be detached from a panel, to float on top of an area. If detached, the track should have fully rounded corners.
Table of options#
From the design point of view, each component has a number of options. These options and their names are platform agnostic, and each implementation should adapt these to fit into their framework.
Behaviors#
Clicking and dragging#
Clicking and dragging the middle portion of the bar scrolls the timeline area horizontally or vertically, depending on the context. The handles at the edges of the bar can be clicked and dragged to zoom in or zoom out of the timeline (dragging inward zooms in, while dragging outward zooms out).
Cursors#
On hover, the cursor shows a pointing hand. On mouse down, the cursor shows a pointing hand slider cursor when scrolling.
Changelog#
- Updated all colors to 6.0.0
- This component has been added to the website
Design checklist#
All interactive states
Includes all interactive states that are applicable (hover, down, focus, keyboard focus, disabled).
All color themes
Works properly across all four color themes (lightest, light, dark, darkest).
All platform scales
Includes a desktop scale (UWP, macOS, web desktop) and a mobile scale (iOS, Android, web mobile).
Accessible use of color
Color is not used as the only visual means of conveying information (WCAG 2.0 1.4.1).
Accessible contrast for text
Text has a contrast ratio of at least 4.5:1 for small text and at least 3:1 for large text (WCAG 2.0 1.4.3).
Accessible contrast for UI components
Visual information required to identify components and states (except inactive components) has a contrast ratio of at least 3:1 (WCAG 2.1 1.4.11).
Content design
UI language and information design considerations have been incorporated into component design.
Defined options
Includes relevant options (variant, style, size, orientation, optional iconography, decorations, selection, error state, etc.)
Defined behaviors
Includes guidelines for keyboard focus, layout (wrapping, truncation, overflow), animation, interactions, etc.
Usage guidelines
Includes a list of dos and don'ts that highlight best practices and common mistakes.
Writing guidelines
Includes content standards or usage guidelines for how to write or format in-product content for the component.
Internationalization guidelines
Works properly across various locales and includes guidelines for bi-directionality (RTL).
Keyboard interactions
Follows WCAG 2.0 standards for keyboard accessibility guidelines and includes a description of the keyboard interactions.
Design tokens
All design attributes (color, typography, layout, animation, etc.) are available as design tokens.
UI kit
Includes a downloadable XD file that shows multiple options, states, color themes, and platform scales.
Generated UI kit
Includes a downloadable XD file, generated by code using design tokens defined in Spectrum DNA, and shows multiple options, states, color themes, and platform scales.
In Spectrum for Adobe XD plugin
Component is included in the Spectrum for Adobe XD plugin.