org.zaval.lw.gdp
Class Controller

java.lang.Object
  |
  +--org.zaval.lw.gdp.Controller

Direct Known Subclasses:

DgnController, ShapeController

public abstract class Controller

extends java.lang.Object

This abstract class is a base for classes that want to control behaviour different lightweight components. The controlled component is defined as a target component and can be specified by the setTarget method.

Field Summary
protected  LwComponent	target

 

Constructor Summary

Controller(LwComponent target)           Constructs a new controller with the specified target component.

 

Method Summary
LwComponent	getTarget()           Gets the current target component.
void	setTarget(LwComponent c)           Sets the specified target component.
protected abstract  void	targetWasChanged(LwComponent newTarget, LwComponent oldTarget)           The method is called whenever the target component has been changed.

 

Methods inherited from class java.lang.Object

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

 

Field Detail

target

protected LwComponent target

Controller

public Controller(LwComponent target)

Constructs a new controller with the specified target component.

Parameters:

target - the specified target component.

setTarget

public void setTarget(LwComponent c)

Sets the specified target component.

Parameters:

c - the specified target component.

getTarget

public LwComponent getTarget()

Gets the current target component.

Returns:

a current target component.

targetWasChanged

protected abstract void targetWasChanged(LwComponent newTarget,
                                         LwComponent oldTarget)

The method is called whenever the target component has been changed. Use the method to remove appropriate listeners for the old target instance and set a new listener set for the new target component.

Parameters:

newTarget - the specified new target component.

oldTarget - the specified old target component.