Listening to Events

When a class needs to receive image events, such as be notified of the arrival of a new image frame, it must implement the ImageEventListener interface. Once registered in the ImageManager, it will receive network events each time a new image is received.

ImageEventListener

This interface has the following function, that is called when the corresponding event is triggered in the ImageManager:

• onImageArrived(): called when a new image has arrived. The argument passed is not the new image, but the ImageManagerthat triggered the event. This way, the received image can be protected from being corrupted, as it cannot be overwritten while it is being read.

MockImageEventListener

Implements the following functions to extract information about received network events:

• getDataArrived(): returns the amount of image events received.
• resetDataArrived(): resets the counter of image events received.
• getStoredImage(): returns the image received in the most recent image event.