Motorola SYMBOL MINISCAN MSXX04 Guía de usuario Pagina 58

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Chapter 6: Indicators
Controlling Pulses
Psion Mobile Devices Developers Guide
46
6.3 Controlling Pulses
The following terms are used to describe the behaviour of a pulsing LED:
Independent colour: On multi-colour LEDs, if the independent colour flag is set, this pulse can add to the
colour being displayed by the LED.
Extend current pulse: This feature only applies when the independent colour flag is also set. If the LED is
in the process of performing a pulse using the same colour, the duration of this new pulse replaces the
duration of the existing pulse. This can result in the duration either being extended or reduced.
Several overlapping pulses can exist. The effects depend on the settings of the independent colour flag and
the extend current pulse flag.
6.4 Controlling Illumination Patterns
The Mobile Devices SDK provides the ability to display a two-colour illumination pattern on a LED.
The following diagram shows how an illumination pattern is structured:
The two colours, their duration times, the delay between repeats, and the number of repeats can be defined
in the application. See the online help for your programming language for information on how to specify
these values.
6.5 Getting Started with Indicators
For articles on Ingenuity Working that will guide you in getting started with working with indicators see:
community.psion.com/tags/indicators/noteDG
6.6 Code Samples for Indicators
For postings on Ingenuity Working that contain code samples that contain indicators see:
community.psion.com/tags/indicators/codeDG
6.7 Indicator API Elements
C++: The display on all Psion computers is controlled using the PsionTeklogix::Indicators namespace.
Java: The display on all Psion computers is controlled using the com.teklogix.indicators package.
.NET: The display on all Psion computers is controlled using the PsionTeklogix.Indicators namespace.
Duration1 Duration2 Delay
Repeat
Duration1 Duration2
Colour1 Colour2
Time
Colour1 Colour2
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