unc.cdva.interactiveitems
Class MobileItem

java.lang.Object
  unc.cdva.utils.TaggedObject
      unc.cdva.interactiveitems.InteractiveItem
          unc.cdva.interactiveitems.AnimatedItem
              unc.cdva.interactiveitems.MobileItem

All Implemented Interfaces:

Taggable

Direct Known Subclasses:

Projectile, RangeCar, Target

public abstract class MobileItem
extends AnimatedItem

Abstract class for mobile items. Adds a couple of states that all mobile items must have.

Author:

Dan Van Atta

Field Summary

protected int	MOVING Used a state identifier, for when a object is moving.
protected int	STOPPED Used a state identifier, for when a object is stationary.

Fields inherited from class unc.cdva.interactiveitems.InteractiveItem

direction, position, scaling

Constructor Summary

MobileItem()

Method Summary

abstract void	advanceInTime(long delta) Method to indicate the passage of time.
boolean	isMoving()
boolean	isStopped()
void	setMoving() Puts the object in the 'moving' state.
void	setStopped() Puts the object in the 'stopped' state.

Methods inherited from class unc.cdva.interactiveitems.InteractiveItem

getDirection, getPdsBean, getPosition, getScaling, getState, setDirection, setPds, setPosition, setScaling, setState

Methods inherited from class unc.cdva.utils.TaggedObject

createId, equals, getId, hashCode, setId, setId

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

MOVING

protected final int MOVING

Used a state identifier, for when a object is moving.

See Also:

Constant Field Values

STOPPED

protected final int STOPPED

Used a state identifier, for when a object is stationary.

See Also:

Constant Field Values

Constructor Detail

MobileItem

public MobileItem()

Method Detail

advanceInTime

public abstract void advanceInTime(long delta)

Method to indicate the passage of time. This method is what achieves object motion in essence. This method is often called by a timer to indicate the passage of time, and thus the object should update it's position value etc..

Specified by:

advanceInTime in class AnimatedItem

Parameters:

delta - The amount of time to elapse (in ms)

setMoving

public void setMoving()

Puts the object in the 'moving' state.

setStopped

public void setStopped()

Puts the object in the 'stopped' state.

isMoving

public boolean isMoving()

Returns:

True if the object is in the moving state, false otherwise.

isStopped

public boolean isStopped()

Returns:

True if the object is in the stopped state, false otherwise.