An Object-Oriented Data Display for the TESLA Test Facility

This paper describes an object oriented editor for designing and running graphical user interfaces for control screens of the Distributed Object Oriented Control System (DOOCS). The whole DOOCS system [1] is based on the object-oriented methodology, i.e. devices are handled as objects, data objects are transferred between client and server programs and the data is visualized by display objects. The control system has to display and change the parameters of many devices of the same type. With the drawing editor the user creates a single instance as a synoptical representation of such a device and reuse it in all locations of the display by copy and paste commands. The device display is animated by actual device data and may contain sensitive fields to activate commands to the devices or to start new sub-windows. The required information is passed to the sub-window, therefore, a single prototype of a sub-window has to be created once for all devices of the same type. Historical trends or digital scope plots are also integral parts of the DOOCS data display (ddd) program. Figure. 1. Main window of the ddd editor. The ‘OTR station’ is selected and shown in the small preview window.