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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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