com.klg.jclass.chart3d.j2d
Class MapPick

java.lang.Object
  |
  +--com.klg.jclass.chart3d.j2d.MapPick

All Implemented Interfaces:

Mapping, Serializable

Direct Known Subclasses:

MapPickGrid, MapPickPoint

public class MapPick

extends Object

implements Mapping, Serializable

A class that implements the Mapping interface. This computes the map and pick functions for the j2d version of Chart3d.

See Also:

Serialized Form

Field Summary

protected com.klg.jclass.chart3d.Chart3dData

data

Constructor Summary

MapPick()
Default constructor, required by Java Beans.

MapPick(com.klg.jclass.chart3d.Chart3dData data)
Default constructor, required by Java Beans.

Method Summary

protected double	calcDist(int x1, int y1, int x2, int y2) Find the euclidean distance (squared) between the two passed in points.
com.klg.jclass.chart3d.Mapping	createMapping(com.klg.jclass.chart3d.Chart3dData data) Create a new mapping, depending on the type of input data
com.klg.jclass.chart3d.Chart3dData	getData() Return the internal data object whose type determines the type of MapPick object required.
protected com.klg.jclass.chart3d.ScreenPoint[][]	getScreenPoints() Return the data's screen points.
protected Rectangle	interpolateXY(int xPixel, int yPixel, double xMin, double yMin, double xMax, double yMax, Point3d mapPoint) Find the corresponding (x, y) coordinate in data space to (xPixel, yPixel) via interpolation.
Point3d	map(int xPixel, int yPixel) Dummy implementation.
com.klg.jclass.chart3d.JCData3dIndex	pick(int xPixel, int yPixel) Dummy implementation.
Point	unmap(Point3d point) Performs an unmap operation by transforming the given data point to the position on the screen where it would be drawn.
Point	unpick(com.klg.jclass.chart3d.JCData3dIndex index) Dummy implementation.

Methods inherited from class java.lang.Object

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

Field Detail

data

protected com.klg.jclass.chart3d.Chart3dData data

Constructor Detail

MapPick

public MapPick()

Default constructor, required by Java Beans.

MapPick

public MapPick(com.klg.jclass.chart3d.Chart3dData data)

Default constructor, required by Java Beans.

Method Detail

calcDist

protected double calcDist(int x1,
                          int y1,
                          int x2,
                          int y2)

Find the euclidean distance (squared) between the two passed in points.

interpolateXY

protected Rectangle interpolateXY(int xPixel,
                                  int yPixel,
                                  double xMin,
                                  double yMin,
                                  double xMax,
                                  double yMax,
                                  Point3d mapPoint)

Find the corresponding (x, y) coordinate in data space to (xPixel, yPixel) via interpolation.

getScreenPoints

protected com.klg.jclass.chart3d.ScreenPoint[][] getScreenPoints()

Return the data's screen points. Compute them if they are not already there.

map

public Point3d map(int xPixel,
                   int yPixel)

Dummy implementation. Meant to be overridden in MapPickGrid or MapPickPoint.

Specified by:

map in interface Mapping

Parameters:

xPixel - x value in screen pixels

yPixel - y value in screen pixels

Returns:

The data point that maps to the given screen point

unmap

public Point unmap(Point3d point)

Performs an unmap operation by transforming the given data point to the position on the screen where it would be drawn.

Specified by:

unmap in interface Mapping

Parameters:

point - The data point to be unmapped.

Returns:

The screen point to which the data point maps

pick

public com.klg.jclass.chart3d.JCData3dIndex pick(int xPixel,
                                                 int yPixel)

Dummy implementation. Meant to be overridden in MapPickGrid or MapPickPoint.

Specified by:

pick in interface Mapping

Parameters:

xPixel - x value in screen pixels

yPixel - y value in screen pixels

unpick

public Point unpick(com.klg.jclass.chart3d.JCData3dIndex index)

Dummy implementation. Meant to be overridden in MapPickGrid or MapPickPoint.

Specified by:

unpick in interface Mapping

Parameters:

index - The data index of the point whose screen point is required.

getData

public com.klg.jclass.chart3d.Chart3dData getData()

Return the internal data object whose type determines the type of MapPick object required.

Specified by:

getData in interface Mapping

createMapping

public com.klg.jclass.chart3d.Mapping createMapping(com.klg.jclass.chart3d.Chart3dData data)

Create a new mapping, depending on the type of input data

Specified by:

createMapping in interface Mapping

Parameters:

data - The data on which to base the creation

Returns:

The new mapping instance