GetTypeDescriptionServiceClient QML Type

Qt service client for the GetTypeDescription ROS 2 service. More...

• List of all members, including inherited members

Properties

• request : getTypeDescriptionRequest
• response : getTypeDescriptionResponse

Signals

• callFailed(string error)
• responseReceived(getTypeDescriptionResponse response)

Methods

• QJSValue callService(const getTypeDescriptionRequest&request)

Detailed Description

GetTypeDescriptionServiceClient calls a ROS 2 service. Set the topic and node properties, then call callService() to invoke the service. Alternatively, bind the request property: whenever the bound value changes, the service is called automatically and response is updated with the result.

Property Documentation

request : getTypeDescriptionRequest

The request value for declarative service calls. When autoCall is true (the default), each change of this property schedules a service call at the end of the current event-loop iteration; changes made while the service is unavailable or a call is in flight are remembered and the latest value is dispatched as soon as possible. The result arrives in response.

response : getTypeDescriptionResponse

The most recent response received from the service, whether the call was made via request or callService(). Holds a default-constructed value until the first response arrives. Updated just before responseReceived is emitted.

Signal Documentation

callFailed(string error)

Emitted when the service call fails. error contains the error message.

responseReceived(getTypeDescriptionResponse response)

Emitted when the service call completes successfully. response is a getTypeDescriptionResponse value.

Method Documentation

QJSValue callService(const getTypeDescriptionRequest&request)

Calls the GetTypeDescription ROS 2 service with getTypeDescriptionRequest request. Returns a JS promise that resolves with a getTypeDescriptionResponse response or rejects with an error string. isServiceReady must be true before calling.