Package org.opensourcephysics.display

Class Trail

java.lang.Object

org.opensourcephysics.display.AbstractTrail

org.opensourcephysics.display.Trail

All Implemented Interfaces:

Drawable, LogMeasurable, Measurable

public class Trail
extends AbstractTrail
implements LogMeasurable

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

Fields

Modifier and Type	Field	Description
protected java.awt.geom.GeneralPath	generalPath

Fields inherited from class org.opensourcephysics.display.AbstractTrail

closed, color, drawingStroke, enableMeasure, numpts, xmax, xmaxLogscale, xmin, xminLogscale, ymax, ymaxLogscale, ymin, yminLogscale

Constructor Summary

Constructors

Constructor	Description
Trail()

Method Summary

Modifier and Type	Method	Description
void	addPoint(double x, double y)	Adds a point to the trail.
void	clear()	Clears all points from the trail.
void	closeTrail()	Closes the path by connecting the first point to the last point.
void	draw(DrawingPanel panel, java.awt.Graphics g)	Draws the trail on the panel.
static XML.ObjectLoader	getLoader()	Returns the XML.ObjectLoader for this class.
boolean	isConnected()	Gets the connected flag.
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.

Methods inherited from class org.opensourcephysics.display.AbstractTrail

getNumberOfPoints, getStroke, getXMax, getXMaxLogscale, getXMin, getXMinLogscale, getYMax, getYMaxLogscale, getYMin, getYMinLogscale, isMeasured, setDashedStroke, setMeasured, setStroke

Methods inherited from interface org.opensourcephysics.display.LogMeasurable

getXMaxLogscale, getXMinLogscale, getYMaxLogscale, getYMinLogscale

Methods inherited from interface org.opensourcephysics.display.Measurable

getXMax, getXMin, getYMax, getYMin, isMeasured

Methods inherited from class java.lang.Object

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

Field Detail

generalPath

protected java.awt.geom.GeneralPath generalPath

Constructor Detail

Trail

public Trail()

Method Detail

addPoint

public void addPoint(double x,
                     double y)

Adds a point to the trail.

Specified by:

addPoint in class AbstractTrail

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

closeTrail

public void closeTrail()

Closes the path by connecting the first point to the last point. Points cannot be added to a closed path;

Specified by:

closeTrail in class AbstractTrail

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.

Parameters:

connected - boolean

clear

public void clear()

Clears all points from the trail.

Specified by:

clear in class AbstractTrail

draw

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

Draws the trail on the panel.

Specified by:

draw in interface Drawable

Parameters:

g -

getLoader

public static XML.ObjectLoader getLoader()

Returns the XML.ObjectLoader for this class.

Returns:

the object loader