Module platform

Package org.jfree.chart.block

Class EmptyBlock

java.lang.Object

org.jfree.chart.block.AbstractBlock

org.jfree.chart.block.EmptyBlock

All Implemented Interfaces:

Serializable, Cloneable, Block, Drawable, PublicCloneable

public class EmptyBlock
extends AbstractBlock
implements Block, Cloneable, PublicCloneable, Serializable

An empty block with a fixed size.

See Also:

• Serialized Form

Constructor Summary

Constructors

Constructor	Description
EmptyBlock(double width, double height)	Creates a new block with the specified width and height.

Method Summary

Modifier and Type	Method	Description
Size2D	arrange(Graphics2D g2, RectangleConstraint constraint)	Arranges the contents of the block, within the given constraints, and returns the block size.
Object	clone()	Returns a clone of the block.
void	draw(Graphics2D g2, Rectangle2D area)	Draws the block.
Object	draw(Graphics2D g2, Rectangle2D area, Object params)	Draws the block within the specified area.

Methods inherited from class org.jfree.chart.block.AbstractBlock

arrange, calculateTotalHeight, calculateTotalWidth, drawBorder, equals, getBounds, getContentXOffset, getContentYOffset, getFrame, getHeight, getID, getMargin, getPadding, getWidth, setBorder, setBounds, setFrame, setHeight, setID, setMargin, setMargin, setPadding, setPadding, setWidth, toContentConstraint, trimBorder, trimMargin, trimPadding, trimToContentHeight, trimToContentWidth

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.jfree.chart.block.Block

arrange, getBounds, getID, setBounds, setID

Constructor Details

EmptyBlock

public EmptyBlock(double width,
 double height)

Creates a new block with the specified width and height.

Parameters:

width - the width.

height - the height.

Method Details

arrange

public Size2D arrange(Graphics2D g2,
 RectangleConstraint constraint)

Arranges the contents of the block, within the given constraints, and returns the block size.

Specified by:

arrange in interface Block

Overrides:

arrange in class AbstractBlock

Parameters:

g2 - the graphics device.

constraint - the constraint (null not permitted).

Returns:

The block size (in Java2D units, never null).

draw

public void draw(Graphics2D g2,
 Rectangle2D area)

Draws the block. Since the block is empty, there is nothing to draw except the optional border.

Specified by:

draw in interface Drawable

Parameters:

g2 - the graphics device.

area - the area.

draw

public Object draw(Graphics2D g2,
 Rectangle2D area,
 Object params)

Draws the block within the specified area. Since the block is empty, there is nothing to draw except the optional border.

Specified by:

draw in interface Block

Parameters:

g2 - the graphics device.

area - the area.

params - ignored (null permitted).

Returns:

Always null.

clone

public Object clone()
             throws CloneNotSupportedException

Returns a clone of the block.

Specified by:

clone in interface PublicCloneable

Overrides:

clone in class AbstractBlock

Returns:

A clone.

Throws:

CloneNotSupportedException - if there is a problem cloning.