tapestry.support.swing
Class TArc

java.lang.Object
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  +--tapestry.support.swing.TAnimator
        |
        +--tapestry.support.swing.TDrawable
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              +--tapestry.support.swing.TArc

public class TArc

extends TDrawable

A TArc class is a 2D arc defined by a bounding rectangle, start angle, and angular extent (length of the arc).

The bounding rectangle defines the outer boundary of the full ellipse of which this arc is a partial section. The angles are specified relative to the non-square extents of the bounding rectangle such that 45 degrees always falls on the line from the center of the ellipse to the upper right corner of the bounding rectangle.

Coordinates for a arc are as you would expect from cartesian geometry. (0,0) represents the center of container in which the Arc is drawn, with x-coordinates increasing to the right and y-coordinates increasing to the top of the container. Coordinates are given in pixel units.

Fields inherited from class tapestry.support.swing.TAnimator

DEFAULT_DELAY

Constructor Summary

TArc(int cx, int cy, int width, int height, int start, int extent)
Creates a new TArc centered at position (cx, cy) with specified width and height, whose curve starts at start and continues for extent degrees.

TArc(java.awt.Point center, java.awt.Dimension size, int start, int extent)
Creates a new TArc centered at position center with specified size, whose curve starts at start and continues for extent degrees.

Method Summary

void	drawFeature(java.awt.Graphics g, boolean isFilled)
java.awt.Dimension	getSize() Returns the shape's size.
void	setSize(int width, int height) Sets the shape's size.

Methods inherited from class tapestry.support.swing.TDrawable

act, draw, fill, getCenter, getColor, hide, move, outline, setCenter, setCenter, setColor, setContainer, setLineWidth, show

Methods inherited from class tapestry.support.swing.TAnimator

actionPerformed, dispose, getContainer, getCount, getDelay, init, isRunning, setDelay, start, stop

Methods inherited from class java.lang.Object

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

Constructor Detail

TArc

public TArc(int cx,
            int cy,
            int width,
            int height,
            int start,
            int extent)

Creates a new TArc centered at position (cx, cy) with specified width and height, whose curve starts at start and continues for extent degrees.

Parameters:

cx - center x coordinate of arc's enclosing box

cy - center y coordinate of arc's enclosing box

width - width of rectangular box enclosing arc

height - height of rectangular box enclosing arc

start - starting angle of arc's curve

extent - length of arc's curve in degrees

TArc

public TArc(java.awt.Point center,
            java.awt.Dimension size,
            int start,
            int extent)

Creates a new TArc centered at position center with specified size, whose curve starts at start and continues for extent degrees.

Parameters:

center - center point of arc's enclosing box

size - size of rectangular box enclosing arc

start - starting angle of arc's curve

extent - length of arc's curve in degrees

Method Detail

getSize

public java.awt.Dimension getSize()

Returns the shape's size.

Returns:

width and height of shape

Overrides:

getSize in class TDrawable

setSize

public void setSize(int width,
                    int height)

Sets the shape's size.

Parameters:

width - new width of shape

height - new height of shape

Overrides:

setSize in class TDrawable

drawFeature

public void drawFeature(java.awt.Graphics g,
                        boolean isFilled)

Overrides:

drawFeature in class TDrawable