Re: Moving TimelineEngineThread into Toolkit specific code

[Kirill Grouchnikov <kirillcool@yahoo.com>]

The first drop of 1.1dev (in SVN / downloads) allows providing a custom pulse source with TridentConfig.getInstance().setPulseSource() API.

Here is an example of setting a custom pulse source that fires updates every 100 milliseconds:

public class CustomPulseSource {
    private float value;

    public void setValue(float newValue) {
        SimpleDateFormat sdf = new SimpleDateFormat("mm:SSS");
        System.out.println(sdf.format(new Date()) + " : " + this.value + " -> "
                + newValue);
        this.value = newValue;
    }

    public static void main(String[] args) {
        TridentConfig.getInstance().setPulseSource(
                new TridentConfig.PulseSource() {
                    @Override
                    public void waitUntilNextPulse() {
                        try {
                            Thread.sleep(100);
                        } catch (InterruptedException ie) {
                            ie.printStackTrace();
                        }
                    }
                });
        CustomPulseSource helloWorld = new CustomPulseSource();
        Timeline timeline = new Timeline(helloWorld);
        timeline.addPropertyToInterpolate("value", 0.0f, 1.0f);
        timeline.play();

        try {
            Thread.sleep(3000);
        } catch (Exception exc) {
        }
    }
}

Let me know if this addresses your scenario.

Thanks
Kirill

---

From: Paul Byrne <Paul.Byrne@Sun.COM>
To: dev@trident.kenai.com
Sent: Tuesday, June 23, 2009 8:52:27 AM
Subject: Moving TimelineEngineThread into Toolkit specific code


Hi Kirill,

One thing we do in Wonderland which is a little different from other UI toolkits is to control the systems framerate explicitly. This helps with responsiveness on slower system and preserves resources on higher powered systems. As a result it's more efficient to trigger animation updates on a frame cycle rather than a timer (or timed sleep).  On principal how would you feel moving the TimelineEngineThread into the toolkit specific code ?

I'm just bouncing around ideas at the moment, not formally requesting a change :-)

Rgds

Paul