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Shout3D™ 2.0 - Workflow Tutorial

Coding the toggle

The logic behind our Start-Stop toggle mechanism is simple. When we click on a label that reads Start-Stop, we want the applet to behave as follow:

If the animation has not yet been started, start it.
If the animation is started, and is not currently paused, pause it.
If the animation is started, but is currently paused, unpause it.

Assume that the reference to our TimeSensor is named myTimer, and that there is a variable named started that is initially set to false. In either Java or JavaScript, this logic would be coded like this:


if (started == false) {

    myTimer.start();
    started = true;
}
else if (myTimer.isPaused() == false) {

    myTimer.setPaused(true);
}
else {myTimer.setPaused(false);}

The isPaused() method returns a true value if the TimeSensor is paused, and a false value if it's not. setPaused(true) pauses the TimeSensor and setPaused(false) unpauses it.

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