Use the contextual filter if:
- You want to show the user a meaningful extract of an otherwise highly complex list.
- You need to improve the performance if your app handles very large object lists.
Do not use the contextual filter if:
- You just want to provide a way to filter a list. In this case, use the regular filter instead.
Contextual filter – Responsiveness
- Contextual filter with truncated text in a narrow container, such as on a smartphone.
- Responsive behavior in wider spaces.
The contextual filter is shown as a bar directly above the master list. It comprises two parts:
- The filter value on the left (for example, a customer name).
- The icon for the filter criterion on the right (here, the object type “customer”). The icon helps the user to put the filter value into context.
The user opens the app and sees a prefiltered list of objects. The bar on top of the master list indicates that the list is filtered and by which criteria.
When the user clicks or taps the bar, a screen (on phones) or popup (on desktops/tablets) appears on which the user can select another criterion.
Select Filter Criterion
In this use case, the user should not be able to disable the filter because there is no way to reset it.
Other master list functions (such as Search or Refresh) are still available and remain unaffected by the contextual filter.
Do not use the contextual filter in place of the regular filter in the footer bar. The regular filter is much more versatile and can also be deactivated by the user.
Also note that the contextual and the regular filter both use the same bar to visualize the filter criteria. If the contextual filter is being used, the regular filter can no longer be visualized. Although both filters can technically be used in parallel, we highly recommend that you avoid having both in one list.
Use an icon that is unique and visually represents the current filter criterion.
There is one exception when the contextual filter can actually be cancelled by the user. In this special case, the contextual filter is used to prefilter the listed items in a select dialog.
This use of the contextual filter conveniently offers users a narrowed down list based on their previous selection.
(1) Initial situation: The user is about to select an account and a contact.
(2) The user selects “Best Electronics” and then clicks or taps the value help icon in the Contact field.
(3) The value help dialog appears showing a list of contacts. These are prefiltered (using the contextual filter) to show only contacts from “Best Electronics” (the company the user selected previously).
Note that this time the icon in the filter’s toolbar does not show an account icon, but a Remove icon instead. This allows the user to cancel the filter if he or she wants to add a contact that is not associated with the account selected previously.
When the user clicks or taps the Remove icon , the filter is removed and the entire contact list is shown.
Once the user has selected a contact, the dialog closes and the name is added to the relevant field on the main page.
Opening the value help again resets the dialog to its initial state with the filter set to “Best Electronics”.
Elements and Controls
- No links