Arno Raps

I've did another test application in JavaFX, its a (bit of) remake of my old java download speed meter applet.

Screenshot:


To run the application: click here


The old applet looks like this:

And can be found here

For the old applet I had to hack the HTTPConnection class to be able to report a speed during the transfer, creating Listeners and so on. In JavaFX that isn't necessary:

Java:

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function downloadFile() {     downloadRequest = HttpRequest {         location: some url;         sink: data;         onStarted: function() {             timer.play();             timestart = System.currentTimeMillis();         }     }     downloadRequest.start(); }

And than just put your own Timer on it to report the progress:

Java:

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var timer: Timeline = Timeline {         repeatCount: 20         keyFrames:         [         KeyFrame {             time: 1s             action: function() {                 downloadspeedUpdate();             }         }]         } function downloadspeedUpdate() {     timeDone = (System.currentTimeMillis()-timestart);     currentSpeed  = (downloadRequest.read - lastRead)/1024.0*8.0;     avgSpeed = (downloadRequest.read/1024.0*8.0) / ((System.currentTimeMillis()-timestart)/1000);     if (currentSpeed > maxSpeed) {         maxSpeed = currentSpeed;     }     lastRead = downloadRequest.read; }

And to update the label on the screen, just declare it like this:

Java:

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Text {    font: Font {       size: 20;    }    content: bind "{%.2f Main.currentSpeed/1024}"; }

Notice the keyword "bind", that will tell javaFX to update this text node as soon as the Main.currentSpeed variable is updated. No more listeners!

I wanted to do an upload test too, but I've hit a bug...so that's now submitted to the development team of javafx here