Version 1.0.0

Scroll-zoom bar

Primarily for usage in timelines, a scroll-zoom bar lets a user scroll or zoom with the same control.

Key example of two scroll-zoom bars, the first in a default state and the second showing the hover and scrub state.

Anatomy#


Diagram of the anatomy of a scroll-zoom bar, including the scroll bar, zoom handles, and the track.

Options#


Key example of a scroll-zoom bar at the three optional sizes: small, medium (default), and large.

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.

Two scroll-zoom bars, one in horizontal orientation and one in vertical orientation.

Orientation#

Scroll-zoom bars can be either horizontal or vertical in orientation.

Two scroll-zoom bars, one with the track shown and one with the track hidden.

Hide track#

A scroll-zoom bar can float above an area, and the track can be hidden.

Two scroll-zoom bars, one with the zoom handles shown and one with the zoom handles hidden when inactive.

Hide handles#

The handles of a scroll-zoom bar can be hidden whenever a user is not directly interacting with the component.

A scroll-zoom bar, first in its usual size, and then scaled down for when it's not being interacted with.

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.

Two scroll-zoom bars. First, not detached with square track corners. Second, detached with fully rounded track corners.

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.

PropertyValuesDefault Value
size
small / medium / large
medium
orientation
horizontal / vertical
horizontal
hide track
yes / no
no
hide handles
yes / no
no
scale down
yes / no
no
is detached
yes / no
no

Behaviors#


Two scroll-zoom bars. First, showing the behavior of scrolling by dragging the scroll bar. Second, showing the behavior of zooming by dragging the zoom handles.

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).

Key examples of a scroll-zoom bar showing the correct cursors depending on the interaction. On hover, a pointing hand cursor appears. On mouse down, a pointing hand slider cursor appears when scrolling.

Cursors#

On hover, the cursor shows a pointing hand. On mouse down, the cursor shows a pointing hand slider cursor when scrolling.

Changelog#


DateNumberNotes
Apr 12, 20211.0.0
  • 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).

N/A

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).

N/A

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.

N/A

Writing guidelines

Includes content standards or usage guidelines for how to write or format in-product content for the component.

N/A

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.