Blackberry Smartphones Specifications download pdf (Page 45)

• Use a standard indicator that is appropriate for the type of dialog box. Avoid using multiple indicators in a dialog box.

• Try to avoid making users scroll in a dialog box. Include scroll arrows if your dialog box message or buttons cannot be

displayed fully on the dialog box. If you use standard components, scroll arrows appear automatically if necessary.

• Always allow users to use the Escape key to close a dialog box. Avoid implementing another action when users press the

Escape key to close a dialog box. For example, if a dialog box allows users to change a setting, do not implement any changes

when users press the Escape key. If necessary, display the dialog box at a later time.

• If users press the End/Power key when a dialog box appears on an application screen, display the Home screen or application

list. If users return to the application, display the dialog box again.

Guidelines for layout

• Center the dialog box on the screen. If you use standard components, the BlackBerry® device automatically centers the

dialog box.

• Create dialog boxes that are up to, but not greater than, 90% of the width and height of the screen. If you use standard

components, the BlackBerry device automatically calculates the appropriate size for dialog boxes.

• Center the dialog box indicator vertically with the dialog box message.

• Display messages to the right of the indicator and above any buttons for most languages.

• Place buttons for confirmation actions first. For example, place "Save" before "Discard" or "Cancel."

• Center buttons horizontally in dialog boxes.

• Place buttons vertically in the dialog box. The vertical layout allows buttons to expand to accommodate localized button

labels.

• If you include a check box, match the alignment of the check box with the alignment of the dialog box message. Place the

check box above the buttons. The check box should be checked by default, unless the dialog box displays a message with

critical information for users.

Guidelines for messages

• Be specific. If possible, use one short sentence to clearly state the reason for displaying the dialog box and the actions that

can dismiss it.

• Use complete sentences for messages where possible.

UI Guidelines

Dialog boxes

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Blackberry Smartphones Specifications Page 45