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org.jfree.chart.block
Class AbstractBlock

java.lang.Object
  extended by org.jfree.chart.block.AbstractBlock
All Implemented Interfaces:
java.io.Serializable, java.lang.Cloneable
Direct Known Subclasses:
BlockContainer, ColorBlock, EmptyBlock, LabelBlock, LegendGraphic, Title

public class AbstractBlock
extends java.lang.Object
implements java.lang.Cloneable, java.io.Serializable

A convenience class for creating new classes that implement the Block interface.

See Also:
Serialized Form

Constructor Summary
protected AbstractBlock()
          Creates a new block.
 
Method Summary
 org.jfree.ui.Size2D arrange(java.awt.Graphics2D g2)
          Arranges the contents of the block, with no constraints, and returns the block size.
 org.jfree.ui.Size2D arrange(java.awt.Graphics2D g2, RectangleConstraint constraint)
          Arranges the contents of the block, within the given constraints, and returns the block size.
protected  double calculateTotalHeight(double contentHeight)
          Adds the margin, border and padding to the specified content height.
protected  double calculateTotalWidth(double contentWidth)
          Adds the margin, border and padding to the specified content width.
 java.lang.Object clone()
          Returns a clone of this block.
protected  void drawBorder(java.awt.Graphics2D g2, java.awt.geom.Rectangle2D area)
          Draws the border around the perimeter of the specified area.
 boolean equals(java.lang.Object obj)
          Tests this block for equality with an arbitrary object.
 BlockBorder getBorder()
          Deprecated. Use getFrame() instead.
 java.awt.geom.Rectangle2D getBounds()
          Returns the current bounds of the block.
 double getContentXOffset()
          Returns the x-offset for the content within the block.
 double getContentYOffset()
          Returns the y-offset for the content within the block.
 BlockFrame getFrame()
          Returns the current frame (border).
 double getHeight()
          Returns the natural height of the block, if this is known in advance.
 java.lang.String getID()
          Returns the id.
 org.jfree.ui.RectangleInsets getMargin()
          Returns the margin.
 org.jfree.ui.RectangleInsets getPadding()
          Returns the padding.
 double getWidth()
          Returns the natural width of the block, if this is known in advance.
 void setBorder(BlockBorder border)
          Deprecated. Use setFrame(BlockFrame) instead.
 void setBorder(double top, double left, double bottom, double right)
          Sets a black border with the specified line widths.
 void setBounds(java.awt.geom.Rectangle2D bounds)
          Sets the bounds of the block.
 void setFrame(BlockFrame frame)
          Sets the frame (or border).
 void setHeight(double height)
          Sets the natural width of the block, if this is known in advance.
 void setID(java.lang.String id)
          Sets the id for the block.
 void setMargin(double top, double left, double bottom, double right)
          Sets the margin.
 void setMargin(org.jfree.ui.RectangleInsets margin)
          Sets the margin (use RectangleInsets.ZERO_INSETS for no padding).
 void setPadding(double top, double left, double bottom, double right)
          Sets the padding.
 void setPadding(org.jfree.ui.RectangleInsets padding)
          Sets the padding (use RectangleInsets.ZERO_INSETS for no padding).
 void setWidth(double width)
          Sets the natural width of the block, if this is known in advance.
protected  RectangleConstraint toContentConstraint(RectangleConstraint c)
          Returns a constraint for the content of this block that will result in the bounds of the block matching the specified constraint.
protected  java.awt.geom.Rectangle2D trimBorder(java.awt.geom.Rectangle2D area)
          Reduces the specified area by the amount of space consumed by the border.
protected  java.awt.geom.Rectangle2D trimMargin(java.awt.geom.Rectangle2D area)
          Reduces the specified area by the amount of space consumed by the margin.
protected  java.awt.geom.Rectangle2D trimPadding(java.awt.geom.Rectangle2D area)
          Reduces the specified area by the amount of space consumed by the padding.
protected  double trimToContentHeight(double fixedHeight)
          Calculate the height available for content after subtracting the margin, border and padding space from the specified fixed height.
protected  double trimToContentWidth(double fixedWidth)
          Calculate the width available for content after subtracting the margin, border and padding space from the specified fixed width.
 
Methods inherited from class java.lang.Object
finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

AbstractBlock

protected AbstractBlock()
Creates a new block.

Method Detail

getID

public java.lang.String getID()
Returns the id.

Returns:
The id (possibly null).
See Also:
setID(String)

setID

public void setID(java.lang.String id)
Sets the id for the block.

Parameters:
id - the id (null permitted).
See Also:
getID()

getWidth

public double getWidth()
Returns the natural width of the block, if this is known in advance. The actual width of the block may be overridden if layout constraints make this necessary.

Returns:
The width.
See Also:
setWidth(double)

setWidth

public void setWidth(double width)
Sets the natural width of the block, if this is known in advance.

Parameters:
width - the width (in Java2D units)
See Also:
getWidth()

getHeight

public double getHeight()
Returns the natural height of the block, if this is known in advance. The actual height of the block may be overridden if layout constraints make this necessary.

Returns:
The height.
See Also:
setHeight(double)

setHeight

public void setHeight(double height)
Sets the natural width of the block, if this is known in advance.

Parameters:
height - the width (in Java2D units)
See Also:
getHeight()

getMargin

public org.jfree.ui.RectangleInsets getMargin()
Returns the margin.

Returns:
The margin (never null).
See Also:
getMargin()

setMargin

public void setMargin(org.jfree.ui.RectangleInsets margin)
Sets the margin (use RectangleInsets.ZERO_INSETS for no padding).

Parameters:
margin - the margin (null not permitted).
See Also:
getMargin()

setMargin

public void setMargin(double top,
                      double left,
                      double bottom,
                      double right)
Sets the margin.

Parameters:
top - the top margin.
left - the left margin.
bottom - the bottom margin.
right - the right margin.
See Also:
getMargin()

getBorder

public BlockBorder getBorder()
Deprecated. Use getFrame() instead.

Returns the border.

Returns:
The border (never null).

setBorder

public void setBorder(BlockBorder border)
Deprecated. Use setFrame(BlockFrame) instead.

Sets the border for the block (use BlockBorder.NONE for no border).

Parameters:
border - the border (null not permitted).
See Also:
getBorder()

setBorder

public void setBorder(double top,
                      double left,
                      double bottom,
                      double right)
Sets a black border with the specified line widths.

Parameters:
top - the top border line width.
left - the left border line width.
bottom - the bottom border line width.
right - the right border line width.

getFrame

public BlockFrame getFrame()
Returns the current frame (border).

Returns:
The frame.
Since:
1.0.5
See Also:
setFrame(BlockFrame)

setFrame

public void setFrame(BlockFrame frame)
Sets the frame (or border).

Parameters:
frame - the frame (null not permitted).
Since:
1.0.5
See Also:
getFrame()

getPadding

public org.jfree.ui.RectangleInsets getPadding()
Returns the padding.

Returns:
The padding (never null).
See Also:
setPadding(RectangleInsets)

setPadding

public void setPadding(org.jfree.ui.RectangleInsets padding)
Sets the padding (use RectangleInsets.ZERO_INSETS for no padding).

Parameters:
padding - the padding (null not permitted).
See Also:
getPadding()

setPadding

public void setPadding(double top,
                       double left,
                       double bottom,
                       double right)
Sets the padding.

Parameters:
top - the top padding.
left - the left padding.
bottom - the bottom padding.
right - the right padding.

getContentXOffset

public double getContentXOffset()
Returns the x-offset for the content within the block.

Returns:
The x-offset.
See Also:
getContentYOffset()

getContentYOffset

public double getContentYOffset()
Returns the y-offset for the content within the block.

Returns:
The y-offset.
See Also:
getContentXOffset()

arrange

public org.jfree.ui.Size2D arrange(java.awt.Graphics2D g2)
Arranges the contents of the block, with no constraints, and returns the block size.

Parameters:
g2 - the graphics device.
Returns:
The block size (in Java2D units, never null).

arrange

public org.jfree.ui.Size2D arrange(java.awt.Graphics2D g2,
                                   RectangleConstraint constraint)
Arranges the contents of the block, within the given constraints, and returns the block size.

Parameters:
g2 - the graphics device.
constraint - the constraint (null not permitted).
Returns:
The block size (in Java2D units, never null).

getBounds

public java.awt.geom.Rectangle2D getBounds()
Returns the current bounds of the block.

Returns:
The bounds.
See Also:
setBounds(Rectangle2D)

setBounds

public void setBounds(java.awt.geom.Rectangle2D bounds)
Sets the bounds of the block.

Parameters:
bounds - the bounds (null not permitted).
See Also:
getBounds()

trimToContentWidth

protected double trimToContentWidth(double fixedWidth)
Calculate the width available for content after subtracting the margin, border and padding space from the specified fixed width.

Parameters:
fixedWidth - the fixed width.
Returns:
The available space.
See Also:
trimToContentHeight(double)

trimToContentHeight

protected double trimToContentHeight(double fixedHeight)
Calculate the height available for content after subtracting the margin, border and padding space from the specified fixed height.

Parameters:
fixedHeight - the fixed height.
Returns:
The available space.
See Also:
trimToContentWidth(double)

toContentConstraint

protected RectangleConstraint toContentConstraint(RectangleConstraint c)
Returns a constraint for the content of this block that will result in the bounds of the block matching the specified constraint.

Parameters:
c - the outer constraint (null not permitted).
Returns:
The content constraint.

calculateTotalWidth

protected double calculateTotalWidth(double contentWidth)
Adds the margin, border and padding to the specified content width.

Parameters:
contentWidth - the content width.
Returns:
The adjusted width.

calculateTotalHeight

protected double calculateTotalHeight(double contentHeight)
Adds the margin, border and padding to the specified content height.

Parameters:
contentHeight - the content height.
Returns:
The adjusted height.

trimMargin

protected java.awt.geom.Rectangle2D trimMargin(java.awt.geom.Rectangle2D area)
Reduces the specified area by the amount of space consumed by the margin.

Parameters:
area - the area (null not permitted).
Returns:
The trimmed area.

trimBorder

protected java.awt.geom.Rectangle2D trimBorder(java.awt.geom.Rectangle2D area)
Reduces the specified area by the amount of space consumed by the border.

Parameters:
area - the area (null not permitted).
Returns:
The trimmed area.

trimPadding

protected java.awt.geom.Rectangle2D trimPadding(java.awt.geom.Rectangle2D area)
Reduces the specified area by the amount of space consumed by the padding.

Parameters:
area - the area (null not permitted).
Returns:
The trimmed area.

drawBorder

protected void drawBorder(java.awt.Graphics2D g2,
                          java.awt.geom.Rectangle2D area)
Draws the border around the perimeter of the specified area.

Parameters:
g2 - the graphics device.
area - the area.

equals

public boolean equals(java.lang.Object obj)
Tests this block for equality with an arbitrary object.

Overrides:
equals in class java.lang.Object
Parameters:
obj - the object (null permitted).
Returns:
A boolean.

clone

public java.lang.Object clone()
                       throws java.lang.CloneNotSupportedException
Returns a clone of this block.

Overrides:
clone in class java.lang.Object
Returns:
A clone.
Throws:
java.lang.CloneNotSupportedException - if there is a problem creating the clone.

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