Use of Touch events in Blackberry

protected boolean touchEvent(TouchEvent message)
{
boolean isConsumed = false;

TouchGesture touchGesture = message.getGesture();
if (touchGesture != null)
{

if (touchGesture.getEvent() == TouchGesture.SWIPE)
{

switch(touchGesture.getSwipeDirection())
{
case TouchGesture.SWIPE_NORTH:
Dialog.alert("Swipe to up side ");
break;
case TouchGesture.SWIPE_SOUTH:
Dialog.alert("Swipe to down side ");
break;
case TouchGesture.SWIPE_EAST:

Dialog.alert("Swipe to right side ");
break;
case TouchGesture.SWIPE_WEST:

Dialog.alert("Swipe to left side ");

break;
}
isConsumed = true;
}
}
return isConsumed;
}