Package org.opensourcephysics.display2d

Class DataRaster

java.lang.Object

org.opensourcephysics.display2d.DataRaster

All Implemented Interfaces:

Drawable, Measurable

public class DataRaster
extends java.lang.Object
implements Measurable

DataRaster maps (x,y) data onto an image. The image has the same size as the data panel. Every data point renders itself as one pixel.

Field Summary

Fields

Modifier and Type	Field	Description
protected int	alpha
protected java.awt.image.BufferedImage	image
protected int	maxPoints
DrawingPanel	primaryDrawingPanel	The drawing panel that determines the image size.
protected double	xmax
protected double	xmin
protected double	ymax
protected double	ymin

Constructor Summary

Constructors

Constructor	Description
DataRaster(DrawingPanel dp, double _xmin, double _xmax, double _ymin, double _ymax)	Constructs a DataRaster object that maps (x,y) data to image pixels.

Method Summary

Modifier and Type	Method	Description
void	append(int dataIndex, double x, double y)	Appends an (x,y) datum to the image.
protected org.opensourcephysics.display2d.DataRaster.ImageData	checkIndex(int dataIndex)	Ensures that the image data exists
void	clear()	Clears all data from all Datasets.
void	clear(int i)	Clears data from the i-th dataset.
void	draw(DrawingPanel panel, java.awt.Graphics g)	Draw the image containing the dataset pixels.
java.awt.Color	getBackgroundColor()
double	getHeight()
java.awt.Color	getPixColor(int xpix, int ypix)
double	getWidth()
double	getXMax()	Gets the maximum x needed to draw this object.
double	getXMin()	Gets the minimum x needed to draw this object.
double	getYMax()	Gets the maximum y needed to draw this object.
double	getYMin()	Gets the minimum y needed to draw this object.
boolean	isMeasured()	Determines if information is available to set min/max values.
java.awt.image.BufferedImage	render()	Paints a new image using the existing data.
void	setColor(int dataIndex, java.awt.Color color)	Sets the data point marker color.
void	setMinMax(double _minx, double _maxx, double _miny, double _maxy)
void	setVisible(boolean isVisible)	Sets the visibility of the DataRaster.
void	setXMax(double _value)
void	setXMin(double _value)
void	setYMax(double _value)
void	setYMin(double _value)

Methods inherited from class java.lang.Object

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

Field Detail

primaryDrawingPanel

public DrawingPanel primaryDrawingPanel

The drawing panel that determines the image size.

xmin

protected double xmin

xmax

protected double xmax

ymin

protected double ymin

ymax

protected double ymax

alpha

protected int alpha

image

protected java.awt.image.BufferedImage image

maxPoints

protected int maxPoints

Constructor Detail

DataRaster

public DataRaster(DrawingPanel dp,
                  double _xmin,
                  double _xmax,
                  double _ymin,
                  double _ymax)

Constructs a DataRaster object that maps (x,y) data to image pixels.

Parameters:

dp - the drawing panel that will be used to calculate the image size

_xmin - the mininum x value that can be mapped

_xmax - the maximum x value that can be mapped

_ymin - the mininum y value that can be mapped

_ymax - the maximum y value that can be mapped

Method Detail

append

public void append(int dataIndex,
                   double x,
                   double y)

Appends an (x,y) datum to the image.

Parameters:

x -

y -

dataIndex - Description of Parameter

setColor

public void setColor(int dataIndex,
                     java.awt.Color color)

Sets the data point marker color.

Parameters:

dataIndex -

color -

clear

public void clear()

Clears all data from all Datasets.

clear

public void clear(int i)

Clears data from the i-th dataset.

Parameters:

i - the dataset index

checkIndex

protected org.opensourcephysics.display2d.DataRaster.ImageData checkIndex(int dataIndex)

Ensures that the image data exists

Parameters:

dataIndex -

render

public java.awt.image.BufferedImage render()

Paints a new image using the existing data. returns the image buffer

draw

public void draw(DrawingPanel panel,
                 java.awt.Graphics g)

Draw the image containing the dataset pixels.

Specified by:

draw in interface Drawable

Parameters:

panel - the panel containing this data raster

g - the graphics context upon which to draw

isMeasured

public boolean isMeasured()

Description copied from interface: Measurable

Determines if information is available to set min/max values. Objects that store data should return false if data is null.

Specified by:

isMeasured in interface Measurable

Returns:

true if min/max values are valid

setXMin

public void setXMin(double _value)

setXMax

public void setXMax(double _value)

setYMin

public void setYMin(double _value)

setYMax

public void setYMax(double _value)

setMinMax

public void setMinMax(double _minx,
                      double _maxx,
                      double _miny,
                      double _maxy)

getXMin

public double getXMin()

Description copied from interface: Measurable

Gets the minimum x needed to draw this object.

Specified by:

getXMin in interface Measurable

Returns:

minimum

getXMax

public double getXMax()

Description copied from interface: Measurable

Gets the maximum x needed to draw this object.

Specified by:

getXMax in interface Measurable

Returns:

maximum

getYMin

public double getYMin()

Description copied from interface: Measurable

Gets the minimum y needed to draw this object.

Specified by:

getYMin in interface Measurable

Returns:

minimum

getYMax

public double getYMax()

Description copied from interface: Measurable

Gets the maximum y needed to draw this object.

Specified by:

getYMax in interface Measurable

Returns:

minimum

getWidth

public double getWidth()

getHeight

public double getHeight()

getBackgroundColor

public java.awt.Color getBackgroundColor()

getPixColor

public java.awt.Color getPixColor(int xpix,
                                  int ypix)

setVisible

public void setVisible(boolean isVisible)

Sets the visibility of the DataRaster. Drawing will be disabled if visible is false.

Parameters:

isVisible -