Chapter 4. The main form
The main form of the Scream! AVD application allows the user to select and configure the GCF streams to be processed The form is shown below:
The form contains a filter bar and two lists of instruments. The list on the left holds the names of instruments that match the entered filter specification and for which GCF data have been received. These instruments are possible candidates for processing (but data from them will not be processed until they are selected by moving them to the right-hand list). The list on the right holds the names of instruments that have been selected for processing. Data from these instruments will be processed as soon as they are received.
4.1 Status bar
The bottom of the form contains a status bar which displays
a system activity indicator (
); anddata from the last received block of GCF data.
The system activity indicator () shows that the application is operating. It should advance at a regular rate. If an out-of-sequence block is received, the indicator will momentarily display in a red colour.