| 摘要 |
A user interface component, eg a gauge, adapted to present a changing value according to a predetermined behavioural and presentational characteristic comprises a kernel adapted to display a presentation value, a control interface through which an external system communicates the changing value to the kernel and a behaviour interface through which the behavioural characteristic of the component is controlled. The behaviour interface may be a Java interface with a method which calculates the next value for the presentation value. This may be an "immediate" behaviour, which simply returns the current changing value, a "linear" behaviour where the presentation moves towards the changing value by up to a maximum amount each time or an "inertial" behaviour modelling damped simple harmonic motion. The component may give some form of indication when the presentation value is curtently equal to the changing value.
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