org.opensourcephysics.display
Class Trail

java.lang.Object
  org.opensourcephysics.display.Trail

All Implemented Interfaces:

Drawable, Measurable

public class Trail

extends java.lang.Object

implements Drawable, Measurable

Title: Trail Description: A trail of pixels on the screen. This object is often used to show the path of a moving object.

Field Summary

java.awt.Color

color

Constructor Summary

Trail()

Method Summary

void	addPoint(double x, double y) Adds a point to the trail.
void	clear() Clears all points from the trail.
void	draw(DrawingPanel panel, java.awt.Graphics g) Draw the trail on the panel.
static XML.ObjectLoader	getLoader() Returns the XML.ObjectLoader for this class.
double	getXMax() Gets the maximum x value in the trail.
double	getXMin() Gets the minimum x value in the trail.
double	getYMax() Gets the maximum y value in the trail.
double	getYMin() Gets the minimum y value in the trail.
boolean	isConnected() Gets the connected flag.
boolean	isMeasured() Determines if this trail scales the drawing panel.
void	moveToPoint(double x, double y) Starts a new trail segment by moving to a new point without drawing.
void	setConnected(boolean connected) Sets the connectd flag.
void	setMeasured(boolean _enableMeasure) Enables the measured flag so that this circle effects the scale of a drawing panel.

Methods inherited from class java.lang.Object

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

Field Detail

color

public java.awt.Color color

Constructor Detail

Trail

public Trail()

Method Detail

addPoint

public void addPoint(double x,
                     double y)

Adds a point to the trail.

Parameters:

x - double

y - double

moveToPoint

public void moveToPoint(double x,
                        double y)

Starts a new trail segment by moving to a new point without drawing.

Parameters:

x - double

y - double

setConnected

public void setConnected(boolean connected)

Sets the connectd flag. Successive points are connetected by straight lines. Each point is marked as a colored pixel if the trail is not connected.

Parameters:

connected - boolean

isConnected

public boolean isConnected()

Gets the connected flag.

clear

public void clear()

Clears all points from the trail.

draw

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

Draw the trail on the panel.

Specified by:

draw in interface Drawable

Parameters:

g -

panel -

getLoader

public static XML.ObjectLoader getLoader()

Returns the XML.ObjectLoader for this class.

Returns:

the object loader

setMeasured

public void setMeasured(boolean _enableMeasure)

Enables the measured flag so that this circle effects the scale of a drawing panel.

Returns:

minimum

isMeasured

public boolean isMeasured()

Determines if this trail scales the drawing panel.

Specified by:

isMeasured in interface Measurable

Returns:

boolean

getXMin

public double getXMin()

Gets the minimum x value in the trail.

Specified by:

getXMin in interface Measurable

Returns:

double

getXMax

public double getXMax()

Gets the maximum x value in the trail.

Specified by:

getXMax in interface Measurable

Returns:

double

getYMin

public double getYMin()

Gets the minimum y value in the trail.

Specified by:

getYMin in interface Measurable

Returns:

double

getYMax

public double getYMax()

Gets the maximum y value in the trail.

Specified by:

getYMax in interface Measurable

Returns:

double