uk.ac.starlink.topcat.plot

Class CentreZoomRegion

java.lang.Object

uk.ac.starlink.topcat.plot.ZoomRegion

uk.ac.starlink.topcat.plot.CentreZoomRegion

public abstract class CentreZoomRegion
extends ZoomRegion

ZoomRegion implementation for a zoom around the centre of the display region.

Since:

13 Apr 2006

Author:

Mark Taylor

See Also:

Zoomer

Constructor Summary

Constructors

Constructor and Description
CentreZoomRegion(boolean isX) Constructor.

Method Summary

Modifier and Type	Method and Description
ZoomDrag	createDrag(Component comp, Point start) Returns a new ZoomDrag object appropriate for this region.
abstract Rectangle	getDisplay() Returns the display region.
abstract Rectangle	getTarget() Returns the target region.

Methods inherited from class uk.ac.starlink.topcat.plot.ZoomRegion

getCursor, setCursor, setDisplay, setTarget, zoomed

Methods inherited from class java.lang.Object

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

Constructor Detail

CentreZoomRegion

public CentreZoomRegion(boolean isX)

Constructor.

Parameters:

isX - true if the target region is horizontal, false for vertical

Method Detail

createDrag

public ZoomDrag createDrag(Component comp,
                           Point start)

Description copied from class: ZoomRegion

Returns a new ZoomDrag object appropriate for this region.

Specified by:

createDrag in class ZoomRegion

Parameters:

comp - component on which the drag is taking place

start - start point for the drag

Returns:

new drag object

getTarget

public abstract Rectangle getTarget()

Description copied from class: ZoomRegion

Returns the target region. This is the region within which the mouse must be clicked and dragged in order to generate a zoom event.

Overrides:

getTarget in class ZoomRegion

Returns:

target region

getDisplay

public abstract Rectangle getDisplay()

Description copied from class: ZoomRegion

Returns the display region. This is the region used to display visual feedback to the user during a drag gesture.

Overrides:

getDisplay in class ZoomRegion

Returns:

display region