Package doodlepad

Class Arc

java.lang.Object

doodlepad.Shape

doodlepad.Arc

public class Arc
extends Shape

A class that implements a graphical arc shape. An Arc is a partial section of an ellipse that is bounded by the rectangle defined by the parameters passed to the Arc constructor. The start angle and angle extent define the section of the ellipse that makes up the Arc.

Nested Class Summary

Nested classes/interfaces inherited from class doodlepad.Shape

Shape.ShapeMouseEventHandler, Shape.ShapeSelectionEventHandler

Field Summary

Fields inherited from class doodlepad.Shape

draggable, eventsEnabled, fillColor, filled, font, fontFamily, fontSize, fontStyle, height, layer, selectable, selected, shapeListener, strokeColor, stroked, strokeWidth, text, textFillColor, transform, visible, width, x, y

Constructor Summary

Constructors

Constructor	Description
Arc()	Default constructor for the Arc object.
Arc(double x, double y, double width, double height, double startAngle, double arcAngle)	Creates an arc shape defined by a section of an ellipse bounded by the rectangle with upper left corner at (x, y) and size (width, height).
Arc(double x, double y, double width, double height, double startAngle, double arcAngle, Layer layer)	Creates an arc shape defined by a section of an ellipse bounded by the rectangle with upper left corner at (x, y) and size (width, height) and the layer on which the arc will be drawn.
Arc(double x, double y, double width, double height, double startAngle, double arcAngle, Pad pad)	Creates an arc shape defined by a section of an ellipse bounded by the rectangle with upper left corner at (x, y) and size (width, height).

Method Summary

Modifier and Type	Method	Description
void	draw(Graphics2D g)	Draw the shape
double	getArcAngle()	Returns the arc angle for the Arc Shape.
Area	getArea()	Return the area of an arc.
double	getStartAngle()	Returns the start angle for the Arc Shape.
void	setArcAngle(double angle)	Sets the arc angle extent for the Arc Shape.
void	setStartAngle(double angle)	Sets the start angle for the Arc Shape.
void	setText(String text)	A no-op to prevent setting text for this Shape.
String	toString()	Builds and returns a string representation of the arc shape that includes position, size and layer.

Methods inherited from class doodlepad.Shape

contains, contains, drawText, getCenter, getDraggable, getEventsEnabled, getFillAlpha, getFillBlue, getFillColor, getFilled, getFillGreen, getFillRed, getFontFamily, getFontSize, getFontStyle, getHeight, getLayer, getLocation, getPad, getPadLocation, getSelectable, getSelected, getSize, getStrokeAlpha, getStrokeBlue, getStrokeColor, getStroked, getStrokeGreen, getStrokeRed, getStrokeWidth, getText, getTransform, getVisible, getWidth, getWindowLocation, getX, getY, intersects, move, onMouseClicked, onMouseDoubleClicked, onMouseDragged, onMouseEntered, onMouseExited, onMouseMoved, onMousePressed, onMouseReleased, onSelectionChanged, repaint, reset, rotate, rotate, scale, scale, scale, scale, setCenter, setCenter, setDraggable, setEventsEnabled, setFillColor, setFillColor, setFillColor, setFillColor, setFilled, setFontFamily, setFontSize, setFontStyle, setHeight, setLocation, setLocation, setMouseClickedHandler, setMouseDoubleClickedHandler, setMouseDraggedHandler, setMouseEnteredHandler, setMouseExitedHandler, setMouseMovedHandler, setMousePressedHandler, setMouseReleasedHandler, setPadLocation, setSelectable, setSelected, setSelectionChangedHandler, setSize, setSize, setStrokeColor, setStrokeColor, setStrokeColor, setStrokeColor, setStroked, setStrokeWidth, setTextColor, setTextColor, setTextColor, setTextColor, setTransform, setVisible, setWidth, setWindowLocation, setX, setY, toBack, toFront, toWindowCoords, toWindowCoords, translate

Methods inherited from class java.lang.Object

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

Constructor Details

Arc

public Arc(double x,
 double y,
 double width,
 double height,
 double startAngle,
 double arcAngle)

Creates an arc shape defined by a section of an ellipse bounded by the rectangle with upper left corner at (x, y) and size (width, height). The section starts at angle startAngle (degrees) and extends by arcAngle (degrees).

 // Creates an arc with an upper left corner at (10, 20) and a size of (100, 50) 
 // from an angle of 0° and continuing by an extent of 45°.
 Arc arc = new Arc(10, 20, 100, 50, 0, 45);
 

Parameters:

x - The upper x-coordinate of the Arc`s related ellipse bounding box (pixels).

y - The upper y-coordinate of the Arc`s related ellipse bounding box (pixels).

width - The width of the Arc`s related ellipse (pixels).

height - The height of the Arc`s related ellipse bounding box (pixels).

startAngle - The starting angle at which to begin drawing the Arc (degrees).

arcAngle - The angular extent of the Arc, which defines its length (degrees).

Arc

public Arc(double x,
 double y,
 double width,
 double height,
 double startAngle,
 double arcAngle,
 Pad pad)

Creates an arc shape defined by a section of an ellipse bounded by the rectangle with upper left corner at (x, y) and size (width, height). The section starts at angle startAngle (degrees) and extends by arcAngle (degrees).

Parameters:

x - The upper x-coordinate of the Arc`s related ellipse bounding box (pixels).

y - The upper y-coordinate of the Arc`s related ellipse bounding box (pixels).

width - The width of the Arc`s related ellipse (pixels).

height - The height of the Arc`s related ellipse bounding box (pixels).

startAngle - The starting angle at which to begin drawing the Arc (degrees).

arcAngle - The angular extent of the Arc, which defines its length (degrees).

pad - The Pad object on which to create the Arc.

Arc

public Arc(double x,
 double y,
 double width,
 double height,
 double startAngle,
 double arcAngle,
 Layer layer)

Creates an arc shape defined by a section of an ellipse bounded by the rectangle with upper left corner at (x, y) and size (width, height) and the layer on which the arc will be drawn. The section starts at angle startAngle (degrees) and extends by arcAngle (degrees).

Parameters:

x - The upper x-coordinate of the Arc`s related ellipse bounding box (pixels).

y - The upper y-coordinate of the Arc`s related ellipse bounding box (pixels).

width - The width of the Arc`s related ellipse (pixels).

height - The height of the Arc`s related ellipse bounding box (pixels).

startAngle - The starting angle at which to begin drawing the Arc (degrees).

arcAngle - The angular extent of the Arc, which defines its length (degrees).

layer - Layer object to add Arc to, or null if not to add Arc to a Layer.

Arc

public Arc()

Default constructor for the Arc object. Creates an arc shape with the default parameters width=100, height=100, startAngle=0, arcAngle=270. that is draggable shape and positioned randomly.

Method Details

getStartAngle

public double getStartAngle()

Returns the start angle for the Arc Shape.

Returns:

start angle (degrees)

getArcAngle

public double getArcAngle()

Returns the arc angle for the Arc Shape.

Returns:

arc angle extent (degrees)

setStartAngle

public void setStartAngle(double angle)

Sets the start angle for the Arc Shape.

Parameters:

angle - start angle (degrees)

setArcAngle

public void setArcAngle(double angle)

Sets the arc angle extent for the Arc Shape.

Parameters:

angle - arc angle extent (degrees)

setText

public void setText(String text)

A no-op to prevent setting text for this Shape.

Overrides:

setText in class Shape

Parameters:

text - The internal text as a String

toString

public String toString()

Builds and returns a string representation of the arc shape that includes position, size and layer.

Overrides:

toString in class Shape

Returns:

String representation of the arc.

draw

public void draw(Graphics2D g)

Draw the shape

Specified by:

draw in class Shape

Parameters:

g - The Graphics2D object on which to draw the arc

getArea

public Area getArea()

Return the area of an arc. The area will be of the pie section if filled, and an open section if not filled.

Overrides:

getArea in class Shape

Returns:

A java.awt.geom.Area object.