IEventSubscriber Delegates

MTUSDKNET API will invoke the callback function in this chapter to provide the requested data and/or a detailed response. To delegate the event, call the subscribeAll function with the name of a class that implements the IEventSubscriber Delegates interface.

OnEvent

OnEvent handles all event types. The eventType parameter defines which event is triggered.

public void OnEvent( 
    EventType eventType, 
    IData data);

Parameter	Description
eventType	An enumeration indicating the event triggered by the device.
data	Contains the data for the event. The payload is dependent on the event type.

Return Value: None

Example

public class OnEventClass implements IEventSubscriber
{
    public void OnEvent(EventType eventType, IData data)
    {
        // Event handler
    }

}

OnEventClass eventCallBack = new OnEventClass(); 
device.subscribeAll(evenCallBack);

In this example, the main window implements IEventSubscriber. The keyword this is used to pass in the name of the current class MainWindow.

public partial class MainWindow implements IEventSubscriber
{
    public void OnEvent(EventType eventType, IData data)
    {
        // Event handler
    }
    
    public void connectDevice()
    {
        device.subscribeAll(this);
    }
}

Event Data Parsing

Classes can be initialized by passing in the data byte array.

Example

public void OnEvent(EventType eventType, IData data)
    {
        // Barcode data BarCodeData barcodeData =
BarCodeDataBuilder.GetBarCodeData(DeviceType.MMS, data.ByteArray());
 
    // Input request
    InputRequest ir = new InputRequest(data.ByteArray());
 
    // NFC data
    NFCData nfcData = NFCDataBuilder.GetNFCData(DeviceType.MMS, data.ByteArray());

    // Enhanced input request 
    EnhancedInputRequest eir = new
EnhancedInputRequest(data.ByteArray());
    List<DirectoryEntry> deList = eir.EnhancedSelectionList;
 
    }