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Motif and CDE 2.1 Style Guide Reference

Cascading (Choice Type)

Reference

Description

A cascading choice is a type of choice that, when activated, displays a cascaded control.

When to Use

Required
Use a cascading choice to display a cascaded control.

Guidelines

Required
When a user activates a cascading choice, display its associated cascaded control, even when all choices and controls in the cascaded control are unavailable.

Required
Do not display unavailable emphasis on cascading choices.

Required
If a cascading choice is used to display a spring-loaded control, pressing (but not clicking) the SELECT button on the choice activates it and displays the control if it is not already displayed.

Recommended
If a cascading choice is used to display a menu, then pressing (but not clicking) the MENU button on the control activates it and displays the menu if it is not already displayed.

Required
If the SELECT or MENU button is pressed, and the pointer is over a cascading choice whose associated cascaded control is not displayed (for example, because the mouse button was pressed elsewhere and moved to the cascading choice), then releasing the mouse button has no effect.

Required
Releasing the SELECT button over a cascading choice whose associated cascaded control is currently displayed leaves the cascaded control displayed if it was not displayed when the SELECT button was pressed.

Required
Releasing the MENU button over a cascading choice whose associated cascaded menu is currently displayed leaves the cascaded control displayed if it was not displayed when MENU was pressed.

Required
Clicking the SELECT button on a cascading choice activates it if its associated cascaded control is not currently displayed.

Required
If activating a cascading choice displays a menu, then clicking the MENU button on the choice activates it if the menu is not currently displayed.

Required
Clicking the SELECT button on a cascading choice removes the associated cascaded control if it is currently displayed.

Required
If a menu is associated with a cascading choice, then clicking the MENU button on the choice removes the associated cascaded menu if it is currently displayed.

Required
Removing a control removes all of its cascaded descendants.

Essential Related Topics

For more information, see the Choice, Menu (Control), and Spring-Loaded (Control Type) reference pages.

Supplemental Related Topics

For more information, see the Emphasis (Cue) reference page.

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