Blackberry Smartphones Specifications download pdf (Page 61)

Best practice: Implementing check boxes

• Use check boxes when users can select multiple options.

• Use the CheckboxField class to create check boxes. For more information about creating check boxes, see the API

reference for the BlackBerry® Java® SDK and the BlackBerry Java Application UI Quick Reference Guide.

• Do not start an action when users select a check box. For example, do not open a new screen.

• Align check boxes vertically.

• Group and order check boxes logically (for example, group related options together or include the most common options

first). Avoid ordering check boxes alphabetically; alphabetical order is language specific.

Guidelines for labels

• Use clear, concise labels. Verify that the label clearly describes what occurs when users select the check box.

• Use positive labels where possible. For example, if users have the option of turning on or turning off a feature, use "turn on"

instead of "turn off" in the label.

• Place labels on the right side of check boxes. On Option screens, place labels on the left side of check boxes.

• Use sentence case capitalization.

• Punctuate labels for check boxes with a colon (:).

Drop-down lists

Use drop-down lists to provide a set of mutually exclusive values.

Users can perform the following action with a drop-down list:

UI Guidelines

Choice fields

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Blackberry Smartphones Specifications Page 61