diva.canvas.interactor
Class BoundedDragInteractor

java.lang.Object
  diva.canvas.interactor.AbstractInteractor
      diva.canvas.interactor.DragInteractor
          diva.canvas.interactor.BoundedDragInteractor

All Implemented Interfaces:

LayerListener, LayerMotionListener, Interactor, java.util.EventListener

public class BoundedDragInteractor
extends DragInteractor

An interactor that drags its target only within a given rectangular region. An instance of this class sets itself up so that the dragged figures or items always remain within the given region. To do so, it creates an instance of BoundsConstraint that it attaches to itself, and overrides the setup() method to initialize the constraint according to the size of the target.

This interactor is intended more as an example of how to produce a customized drag-interactor than anything else.

Version:

$Id: BoundedDragInteractor.java 38798 2005-07-08 20:00:01Z cxh $

Author:

John Reekie

Field Summary

private java.awt.geom.Rectangle2D	_bounds The bounds
private BoundsConstraint	_constraint The bounds constraint

Constructor Summary

BoundedDragInteractor(java.awt.geom.Rectangle2D bounds)
Create an instance that keeps figures inside the given regio

Method Summary

void	setup(LayerEvent e) Adjust the bounds so that the bounding-box of the target stays within the region.

Methods inherited from class diva.canvas.interactor.DragInteractor

addLayerListener, appendConstraint, constrainPoint, fireLayerEvent, getSelectiveEnabled, getTargetArray, getX, getY, mouseDragged, mousePressed, mouseReleased, prependConstraint, removeLayerListener, setSelectiveEnabled, setTargetArray, targets, translate

Methods inherited from class diva.canvas.interactor.AbstractInteractor

accept, getMouseFilter, isConsuming, isEnabled, isMotionEnabled, mouseClicked, mouseEntered, mouseExited, mouseMoved, setConsuming, setEnabled, setMotionEnabled, setMouseFilter

Methods inherited from class java.lang.Object

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

Field Detail

_bounds

private java.awt.geom.Rectangle2D _bounds

The bounds

_constraint

private BoundsConstraint _constraint

The bounds constraint

Constructor Detail

BoundedDragInteractor

public BoundedDragInteractor(java.awt.geom.Rectangle2D bounds)

Create an instance that keeps figures inside the given regio

Method Detail

setup

public void setup(LayerEvent e)

Adjust the bounds so that the bounding-box of the target stays within the region.

Overrides:

setup in class DragInteractor