Demonstration using Java Applets for visualisation Normal http techniques are used to retrieve the applet. The applet is then executed inside the browser and it starts calling a CGI handler to retrieve the status of the I/O. The applet also uses normal http communication to the SC12, thus avoiding firewall problems. When an I/O is clicked with the mouse, another CGI handler is called to change the I/O point. High degree of integration into one applet This applet below retrieves an image from the SC12 and modifies a few pixels at each I/O update. Smaller applets inside html code Applets can also be used inside html code. Below is a table with an applet in each table entry. We use Javascript to repeat the 8 entries in to table. Of course, applets can also be used to visualise data as text or as graphic trend curves. The use of applets is ideal if you want to dynamically change graphic information inside a web page and if you enjoy Java programming. |
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