This event is also functional in Web panels
After a request for the data was sent (i.e. the onReadData
event is triggered, e.g. scroll the time axis), the event is triggered so many times how many tvTrend
objects are connected to a server (for each tvTrend
Sending the request for the data and receiving the data (together with triggering this event) proceed asynchronously, i.e. after sending the request the viewer operates further, it is controllable, etc.
After the server processes the request, it sends the result back to the viewer and the viewer processes it (the viewer doesn't wait for processing the data by the server, the data can come to the server even with a delay depending on the quality of the connection).