jpicedt.graphic.event
Class ZoomEvent

java.lang.Object
  java.util.EventObject
      jpicedt.graphic.event.ZoomEvent

All Implemented Interfaces:

Serializable

public class ZoomEvent
extends EventObject

Class for notifications of zoom-factor changes sourced by a PECanvas.

Since:

jpicedt 1.3.2

Version:

$Id: ZoomEvent.java,v 1.7 2013/03/27 07:05:42 vincentb1 Exp $

Author:

Sylvain Reynal

See Also:

Serialized Form

Field Summary

Fields inherited from class java.util.EventObject

source

Constructor Summary

ZoomEvent(PECanvas source, double oldZoom, double newZoom, PicPoint ptCenter)
a new ZoomEvent sourced from the given PECanvas

Method Summary

PicPoint	getCenterPoint() Return the coordinates of the point that was at the center of the canvas before the zoom changed.
double	getNewZoomValue() Return the new zoom factor value
double	getOldZoomValue() Return the old zoom factor value
String	toString() a textual representation of this event

Methods inherited from class java.util.EventObject

getSource

Methods inherited from class java.lang.Object

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

Constructor Detail

ZoomEvent

public ZoomEvent(PECanvas source,
                 double oldZoom,
                 double newZoom,
                 PicPoint ptCenter)

a new ZoomEvent sourced from the given PECanvas

Parameters:

source - the originator of the event

oldZoom - the previous zoom value

newZoom - the new zoom value

ptCenter - the point (in model-coordinates) that is expected to be at the center of the view-port. Can be null.

Method Detail

getOldZoomValue

public double getOldZoomValue()

Return the old zoom factor value

getNewZoomValue

public double getNewZoomValue()

Return the new zoom factor value

getCenterPoint

public PicPoint getCenterPoint()

Return the coordinates of the point that was at the center of the canvas before the zoom changed. This is aimed at allowing javax.swing.ViewPort, javax.swing.Scrollpane, etc... to update their view accordingly.

toString

public String toString()

a textual representation of this event

Overrides:

toString in class EventObject