Psion Teklogix 7527S User's Guide download pdf (Page 196)

Chapter 20: Trigger Control

Simulated Events

184 Psion Teklogix Mobile Devices SDK Developers Guide

Single-click flag: This flag is set when a trigger source is pressed and released within ½ the

double-click time configured for that trigger source. The double-click time must be greater than

0(zero).

Double-click flag: This flag is set when a trigger source is pressed twice within the double-click

time configured for that trigger source. The double-click time must be greater than 0 (zero).

20.7.1 Simulated Events

The Mobile Devices SDK can generate a simulated trigger event. This is forwarded to the trigger

driver. The trigger driver sends the event to all registered trigger consumers which also have a

trigger association with the specified trigger event source.

This method generates both trigger-up and trigger-down events.

Any application that simulates trigger events using this method must be well behaved. A trig-

ger-down event must always be followed by a trigger-up event. Sending out multiple trigger-down

and trigger-up events in a row can result in unexpected behaviour. An application must not remove

a trigger association after a trigger-down event—the associated trigger-up event must be simulated

before the association is ended.

20.7.2 Single-Click Events And Double-Click Events

Single-click events and double-click events can be generated by any trigger source, if the config-

ured double-click time for the trigger source is not 0 (zero).

20.8 Trigger Control API Elements

C++: The trigger on all Psion Teklogix computers is controlled using the

PsionTeklogix::Trigger namespace.

Java: The trigger on all Psion Teklogix computers is controlled using the

com.teklogix.trigger package.

.NET: The trigger on all Psion Teklogix computers is controlled using the

PsionTeklogix.Trigger namespace.

Event Sequence (> = followed by) Generated When...

Trigger-down event > trigger-up event

with the single-click event flag set.

A trigger source is pressed and

released within ½ the configured

double-click time.

Trigger-down event > trigger-up event

with the single-click event flag set >

trigger-down event with the doubleclick flag set >

trigger-up event with the double-click flag set.

A trigger source is pressed and

released within ½ the configured

double-click time, and it is pressed

and released a second time before the

double-click time expires.

Trigger-down event > trigger-up event

with the single-click event flag set >

trigger-down event with the doubleclick flag set >

trigger-up event.

A trigger source is pressed and

released within ½ the configured

double-click time, and it is pressed a

second time—but not released—

before the double-click time expires.

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