Updated TouchEvent Properties? - actionscript-3

Question

Let's say I have this very simple function:
function pressingDown(e:TouchEvent):void
{
trace(e.pressure);
}
As you can see, it will trace the pressure of the user's touch, but how do I keep this updated?
For example, the user doesn't move their finger at all and my program needs to detect the pressure of their touch all the time. What Touch Event should I use for this? Does it exist? If it doesn't, what can I do to achieve what I'm asking for, or can I achieve it at all without a 3rd party library/ANE?

Answer 1

I have never used e.pressure before, though I don't know this would work.
But might as well throw out some idea, in case it helps.
Try Event.ENTER_FRAME
package {
public class TouchApp extends MovieClip {
var _currentTouchEvent:TouchEvent;
public function TouchApp()
{
this.addEventListener(TouchEvent.TOUCH_BEGIN, pressingDown);
}
function pressingDown(e:TouchEvent):void
{
_currentTouchEvent = e;
//When touch is down, do this function every frame.
this.addEventListener(Event.ENTER_FRAME, whileBeingTouched);
//Add EventListener to catch "touchEnd" event.
this.stage.addEventListener(TouchEvent.TOUCH_END, onTouchEndHandler);
}
function whileBeingTouched(evt:Event):void
{
//Action to do every frame.
trace(_currentTouchEvent.pressure);
}
function onTouchEndHandler(e:TouchEvent):void
{
if (_currentTouchEvent) _currentTouchEvent = null;
this.removeEventListener(Event.ENTER_FRAME, whileBeingTouched);
this.stage.removeEventListener(TouchEvent.TOUCH_END, onTouchEndHandler);
}
}
}