Package breadboards

Class GLine

java.lang.Object

breadboards.GObject

breadboards.GLine

All Implemented Interfaces:

Drawable

public class GLine
extends GObject

Subclass of GObject used for displaying line segments

Author:

paul oser

Field Summary

Fields

Modifier and Type	Field	Description
double	LINE_TOLERANCE

Constructor Summary

Constructors

Constructor	Description
GLine()	constructs a zero-length segment from (0,0) to itself
GLine(double x0, double y0, double x1, double y1)	constructs a segment from (x0,y0) to (x1,y1)

Method Summary

Modifier and Type	Method	Description
boolean	contains(double px, double py)	returns true if (x,y) is sufficiently close (i.e., within LINE_TOLERANCE) to the segment
void	draw(java.awt.Graphics g)	draws the GLine (generally not called directly)
GRectangle	getBounds()	returns the bounding rectangle of the GLine
java.awt.Color	getColor()	returns color of GLine
GPoint	getEndPoint()	returns end point of the GLine
GPoint	getStartPoint()	returns start point of the GLine
void	scale(double sf)	keeping the same starting point, this scales the length of the GLine by sf
void	scale(double sx, double sy)	keeping the same starting point, this scales the horizontal component of the GLine's length by sx, and the vertical component by sy
void	setColor(java.awt.Color color)	sets the color for the GLine to the specified color
void	setEndPoint(double endX, double endY)	sets the end point for the GLine
void	setStartPoint(double startX, double startY)	sets the start point for the GLine

Methods inherited from class breadboards.GObject

addMouseListener, addMouseMotionListener, getBreadboard, getLocation, getMouseListeners, getMouseMotionListeners, getParent, getX, getY, isVisible, move, movePolar, removeMouseListener, removeMouseMotionListener, sendBackward, sendForward, sendToBack, sendToFront, setLocation, setParent, setVisible, setX, setY, updateBreadboard

Methods inherited from class java.lang.Object

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

Field Detail

LINE_TOLERANCE

public final double LINE_TOLERANCE

See Also:

Constant Field Values

Constructor Detail

GLine

public GLine()

constructs a zero-length segment from (0,0) to itself

GLine

public GLine(double x0,
             double y0,
             double x1,
             double y1)

constructs a segment from (x0,y0) to (x1,y1)

Parameters:

x0 - x-coordinate of starting point

y0 - y-coordinate of starting point

x1 - x-coordinate of end point

y1 - y-coordinate of end point

Method Detail

getBounds

public GRectangle getBounds()

returns the bounding rectangle of the GLine

Specified by:

getBounds in class GObject

Returns:

the bounding rectangle of the GLine

getEndPoint

public GPoint getEndPoint()

returns end point of the GLine

Returns:

end point of the GLine

getStartPoint

public GPoint getStartPoint()

returns start point of the GLine

Returns:

start point of the GLine

getColor

public java.awt.Color getColor()

returns color of GLine

Returns:

color of GLine

setStartPoint

public void setStartPoint(double startX,
                          double startY)

sets the start point for the GLine

Parameters:

startX - x-coordinate for starting point

startY - y-coordinate for starting point

setEndPoint

public void setEndPoint(double endX,
                        double endY)

sets the end point for the GLine

Parameters:

endX - x-coordinate for end point

endY - y-coordinate for end point

setColor

public void setColor(java.awt.Color color)

sets the color for the GLine to the specified color

Parameters:

color - the specified color for the GLine

scale

public void scale(double sx,
                  double sy)

keeping the same starting point, this scales the horizontal component of the GLine's length by sx, and the vertical component by sy

Parameters:

sx - the horizontal scaling factor

sy - the vertical scaling factor

scale

public void scale(double sf)

keeping the same starting point, this scales the length of the GLine by sf

Parameters:

sf - the scaling factor

contains

public boolean contains(double px,
                        double py)

returns true if (x,y) is sufficiently close (i.e., within LINE_TOLERANCE) to the segment

Specified by:

contains in class GObject

Parameters:

px - x-coordinate of the point in question

py - y-coordinate of the point in question

Returns:

true if and only if (x,y) is within LINE_TOLERANCE of the segment

draw

public void draw(java.awt.Graphics g)

draws the GLine (generally not called directly)