uk.ac.starlink.topcat.plot

Interface ZoomDrag

public interface ZoomDrag

Defines a currently active zoom drag gesture.

Since:

28 Mar 2006

Author:

Mark Taylor

See Also:

Zoomer

Method Summary

Modifier and Type	Method and Description
double[][]	boundsAt(Point p) Returns the bounds defined by this drag at a current position p.
void	dragTo(Point p) Invoked when the mouse is dragged to a new point p.

Method Detail

dragTo

void dragTo(Point p)

Invoked when the mouse is dragged to a new point p.

Parameters:

p - current mouse position

boundsAt

double[][] boundsAt(Point p)

Returns the bounds defined by this drag at a current position p. Elements of the result are two-element arrays giving (lower, upper) bounds in one or more dimensions, according to the type of drag. The units should normally be dimensionless: a range of (0,1) indicates the same range as is currently contained by the display region. Bounds may be larger or smaller than the (1,0) interval.

A null return indicates that no legal zoom is represented.

Parameters:

p - current point

Returns:

bounds defined by a drag ending at point p