Difference between revisions of "Request callback"
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The callback will only be called when there is a connection with the given flight simulator or data source.
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'''request_callback''' is used to force a callback on a given data subscription (X-plane, FSX, FS2, IIC or external sources) | '''request_callback''' is used to force a callback on a given data subscription (X-plane, FSX, FS2, IIC or external sources) | ||
{{tip|The callback will only be called when there is a connection with the given flight simulator or data source.}} | |||
== Return value == | == Return value == | ||
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-- subscribe X-plane datarefs on the AirBus | -- subscribe X-plane datarefs on the AirBus | ||
xpl_dataref_subscribe("sim/cockpit2/gauges/indicators/altitude_ft_pilot", "FLOAT", new_altitude_callback) | xpl_dataref_subscribe("sim/cockpit2/gauges/indicators/altitude_ft_pilot", "FLOAT", new_altitude_callback) | ||
-- Force a callback. The 'new_altitude_callback' function will be called here with its current arguments. | -- Force a callback. The 'new_altitude_callback' function will be called here with its current arguments. | ||
request_callback(new_altitude_callback) | request_callback(new_altitude_callback) | ||
</source > | </source > | ||
Revision as of 13:30, 5 February 2019
Description
request_callback(callback_function)
request_callback is used to force a callback on a given data subscription (X-plane, FSX, FS2, IIC or external sources)
The callback will only be called when there is a connection with the given flight simulator or data source.Return value
This function won't return any value.
Arguments
| # | Argument | Type | Description |
|---|---|---|---|
| 1 | function_callback | String | The callback function that should be updated |
Example
-- This function will be called when new data is available from X-plane
function new_altitude_callback(altitude)
print("New altitude: " .. altitude)
end
-- subscribe X-plane datarefs on the AirBus
xpl_dataref_subscribe("sim/cockpit2/gauges/indicators/altitude_ft_pilot", "FLOAT", new_altitude_callback)
-- Force a callback. The 'new_altitude_callback' function will be called here with its current arguments.
request_callback(new_altitude_callback)