This pattern serves as a guideline for the display of safety-relevant functions.
Digit Block
Users need to enter numeric values.
Interactive Example
Press the buttons to enter a number.
Context
This pattern is used to enter numeric values, e.g., in conjunction with a spin control.
Forces
Screen real estate may be an issue using a full digit block. Depending on the context of use, alternative controls for selecting values are: lists, spin controls, dropdown lists, or value sliders.
Solution
The solution proposes a digit block with 12 keys, including asterisk and hash for entering telephone control codes.
If used for composing telephone numbers, the digit block may have the asterisk and the hash key, which both may be absent when the control is used for entering numeric values.
The pattern is a compound control and uses the command button and the text fields and text editing pattern.
Safety Impact
The pattern must be used such that no safety-relevant displays are covered by the digit block.
Usability Impact
Error prevention, user satisfaction
Your opinion!
Feel free to provide your comments, reports of usage of this pattern, or feedback in general!
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