org.jdrawing.graphics
Class GraphicsOperation

java.lang.Object
  org.jdrawing.graphics.GraphicsOperation

All Implemented Interfaces:

DrawingElement

Direct Known Subclasses:

DrawImage, DrawLine, DrawString, PolygonOperation, RectangleOperation, ShapeOperation

public abstract class GraphicsOperation

extends java.lang.Object

implements DrawingElement

This is the base class for all elements, representing drawing operations.

Constructor Summary

GraphicsOperation()
Constructs GraphicsOperation with default style.

GraphicsOperation(Style style)
Constructs GraphicsOperation with given style.

Method Summary

boolean	contains(java.awt.geom.Point2D point) Tests if the element contains a given point.
boolean	equals(java.lang.Object object) Checks whether two graphics operations are equal.
java.awt.Rectangle	getBounds() Returns bounding box of the element.
java.awt.geom.Rectangle2D	getBounds2D() Returns high precision bounding box of the element.
int	getPosition() Returns the position of this operation in the painting sequence of the model.
abstract java.awt.Shape	getShapeOfOperation() Returns shape of the area updated by this operation.
Style	getStyle() Gets Style object encapsulating style attibutes of this operation.
int	hashCode() Returns the hashcode for this graphics operation.
boolean	intersects(java.awt.geom.Rectangle2D rectangle) Tests if the element intersects with the given rectangle.
void	paint(java.awt.Graphics graphics) Paint the element.
abstract void	paintOperation(java.awt.Graphics2D graphics) Performs drawing operation.
void	setPosition(int position) Stores the position of this operation in the painting sequence of the model.
void	setStyle(Style style) Sets Style object encapsulating style attibutes of this operation.

Methods inherited from class java.lang.Object

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

Constructor Detail

GraphicsOperation

public GraphicsOperation()

Constructs GraphicsOperation with default style.

GraphicsOperation

public GraphicsOperation(Style style)

Constructs GraphicsOperation with given style.

Parameters:

style - the style for this graphics operation

Method Detail

setPosition

public void setPosition(int position)

Stores the position of this operation in the painting sequence of the model. Do not call this method directly.

Parameters:

position - new position value

getPosition

public int getPosition()

Returns the position of this operation in the painting sequence of the model. Do not call this method directly.

Returns:

position value

setStyle

public void setStyle(Style style)

Sets Style object encapsulating style attibutes of this operation.

Parameters:

style - the Style object

getStyle

public Style getStyle()

Gets Style object encapsulating style attibutes of this operation.

Returns:

the Style object

paint

public void paint(java.awt.Graphics graphics)

Paint the element. This implementation applies all styles and then calls paintOperation(java.awt.Graphics2D).

Specified by:

paint in interface DrawingElement

Parameters:

graphics - graphics context to use for painting

paintOperation

public abstract void paintOperation(java.awt.Graphics2D graphics)

Performs drawing operation.

Parameters:

graphics - graphics context to use for painting

getShapeOfOperation

public abstract java.awt.Shape getShapeOfOperation()

Returns shape of the area updated by this operation.

Returns:

the shape of updated area

getBounds

public java.awt.Rectangle getBounds()

Returns bounding box of the element. If the element is unbounded then this method returns null. This implementation returns bounding box of the shape returned by getShapeOfOperation().

Specified by:

getBounds in interface DrawingElement

Returns:

bounding box of the element or null is the element is unbounded

getBounds2D

public java.awt.geom.Rectangle2D getBounds2D()

Returns high precision bounding box of the element. If the element is unbounded then this method returns null. This implementation returns bounding box of the shape returned by getShapeOfOperation().

Specified by:

getBounds2D in interface DrawingElement

Returns:

high precision bounding box of the element or null if the element is unbounded

intersects

public boolean intersects(java.awt.geom.Rectangle2D rectangle)

Tests if the element intersects with the given rectangle. This implementation queries the shape returned by getShapeOfOperation() for intersection.

Specified by:

intersects in interface DrawingElement

Parameters:

rectangle - rectangle to be checked for intersection

Returns:

true if the element intersects with the given rectangle; false otherwase

contains

public boolean contains(java.awt.geom.Point2D point)

Tests if the element contains a given point. This implementation queries the shape returned by getShapeOfOperation() if it contains given point.

Specified by:

contains in interface DrawingElement

Parameters:

point - to be checked

Returns:

true if the element contains given point; false otherwise

equals

public boolean equals(java.lang.Object object)

Checks whether two graphics operations are equal. The result is true if and only if the argument is not null and is a GraphicsOperation object that has the same style and position as this GraphicsOperation.

Parameters:

object - the Object to compare with this GraphicsOperation

Returns:

true if the objects are equal; false otherwise.

hashCode

public int hashCode()

Returns the hashcode for this graphics operation.

Returns:

a hash code for this graphics operation.