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If an roMessagePort is attached to an roElectron object, it will receive roElectronEvent objects when something happens to the parent roElectron instance.

ifUserData

SetUserData(user_data As Object)

Sets the user data that will be returned when events are raised.

GetUserData() As Object

Returns the user data that has previously been set via SetUserData(). It will return Invalid if no data has been set.

ifElectronEvent

GetData() As roAssociativeArray

Returns the event data as an associative array with the following key/value pairs:

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• reason string

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• : The cause of the event, which can be one of the following:

  • process_exit: The Electron instance has exited.

  • message: The Electron instance has sent a message.

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• exit_code number: 

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•  The value of this field is set by the Electron application when it exits (www.electronjs.org/docs/api/app#appexitexitcode). The Electron process exit code is only defined in OS 8.2 and later OS versions.

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•  Note that

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• the Electron script can also use these codes for its own purposes. 

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• message string

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• :

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• If the reason field value is message, this field returns the contents of the message.

Example

The following event loop waits for an Electron event and reports the events:

while true
    ev = wait(0, gaa.mp)
    print "=== BS: Received event ";type(ev)
    if type(ev) = "roElectronEvent" then
        eventData = ev.GetData()
        if type(eventData) = "roAssociativeArray" and type(eventData.reason) = "roString" then
            if eventData.reason = "process_exit" then
                print "=== BS: Electron instance exited with code " ; eventData.exit_code
            else if eventData.reason = "message" then
                print "=== BS: Received message "; eventData.message
                ' To use this: msgPort.PostBSMessage({text: "my message"});
            else
                print "======= UNHANDLED ELECTRON EVENT ========="
                print eventData.reason
            endif
        else
            print "=== BS: Unknown eventData: "; type(eventData)
        endif
    endif
endwhile