Package org.jfree.chart.plot

Class Marker

java.lang.Object

org.jfree.chart.plot.Marker

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

CategoryMarker, IntervalMarker, ValueMarker

public abstract class Marker
extends Object
implements Cloneable, Serializable

The base class for markers that can be added to plots to highlight a value or range of values.

An event notification mechanism was added to this class in JFreeChart version 1.0.3.

See Also:

• Serialized Form

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	Marker()	Creates a new marker with default attributes.
protected	Marker(Paint paint)	Constructs a new marker.
protected	Marker(Paint paint, Stroke stroke, Paint outlinePaint, Stroke outlineStroke, float alpha)	Constructs a new marker.

Method Summary

Modifier and Type	Method	Description
void	addChangeListener(MarkerChangeListener listener)	Registers an object for notification of changes to the marker.
boolean	canEqual(Object other)	Ensures symmetry between super/subclass implementations of equals.
Object	clone()	Creates a clone of the marker.
boolean	equals(Object obj)	Tests the marker for equality with an arbitrary object.
float	getAlpha()	Returns the alpha transparency.
String	getLabel()	Returns the label (if null no label is displayed).
RectangleAnchor	getLabelAnchor()	Returns the label anchor.
Color	getLabelBackgroundColor()	Returns the label background color.
Font	getLabelFont()	Returns the label font.
RectangleInsets	getLabelOffset()	Returns the label offset.
LengthAdjustmentType	getLabelOffsetType()	Returns the label offset type.
Paint	getLabelPaint()	Returns the label paint.
TextAnchor	getLabelTextAnchor()	Returns the label text anchor.
EventListener[]	getListeners(Class listenerType)	Returns an array containing all the listeners of the specified type.
Paint	getOutlinePaint()	Returns the outline paint.
Stroke	getOutlineStroke()	Returns the outline stroke.
Paint	getPaint()	Returns the paint.
Stroke	getStroke()	Returns the stroke.
int	hashCode()
void	notifyListeners(MarkerChangeEvent event)	Notifies all registered listeners that the marker has been modified.
void	removeChangeListener(MarkerChangeListener listener)	Unregisters an object for notification of changes to the marker.
void	setAlpha(float alpha)	Sets the alpha transparency that should be used when drawing the marker, and sends a MarkerChangeEvent to all registered listeners.
void	setLabel(String label)	Sets the label (if null no label is displayed) and sends a MarkerChangeEvent to all registered listeners.
void	setLabelAnchor(RectangleAnchor anchor)	Sets the label anchor and sends a MarkerChangeEvent to all registered listeners.
void	setLabelBackgroundColor(Color color)	Sets the label background color.
void	setLabelFont(Font font)	Sets the label font and sends a MarkerChangeEvent to all registered listeners.
void	setLabelOffset(RectangleInsets offset)	Sets the label offset and sends a MarkerChangeEvent to all registered listeners.
void	setLabelOffsetType(LengthAdjustmentType adj)	Sets the label offset type and sends a MarkerChangeEvent to all registered listeners.
void	setLabelPaint(Paint paint)	Sets the label paint and sends a MarkerChangeEvent to all registered listeners.
void	setLabelTextAnchor(TextAnchor anchor)	Sets the label text anchor and sends a MarkerChangeEvent to all registered listeners.
void	setOutlinePaint(Paint paint)	Sets the outline paint and sends a MarkerChangeEvent to all registered listeners.
void	setOutlineStroke(Stroke stroke)	Sets the outline stroke and sends a MarkerChangeEvent to all registered listeners.
void	setPaint(Paint paint)	Sets the paint and sends a MarkerChangeEvent to all registered listeners.
void	setStroke(Stroke stroke)	Sets the stroke and sends a MarkerChangeEvent to all registered listeners.

Methods inherited from class java.lang.Object

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

Constructor Details

Marker

protected Marker()

Creates a new marker with default attributes.

Marker

protected Marker(Paint paint)

Constructs a new marker.

Parameters:

paint - the paint (null not permitted).

Marker

protected Marker(Paint paint,
 Stroke stroke,
 Paint outlinePaint,
 Stroke outlineStroke,
 float alpha)

Constructs a new marker.

Parameters:

paint - the paint (null not permitted).

stroke - the stroke (null not permitted).

outlinePaint - the outline paint (null permitted).

outlineStroke - the outline stroke (null permitted).

alpha - the alpha transparency (must be in the range 0.0f to 1.0f).

Throws:

IllegalArgumentException - if paint or stroke is null, or alpha is not in the specified range.

Method Details

getPaint

public Paint getPaint()

Returns the paint.

Returns:

The paint (never null).

See Also:

• setPaint(Paint)

setPaint

public void setPaint(Paint paint)

Sets the paint and sends a MarkerChangeEvent to all registered listeners.

Parameters:

paint - the paint (null not permitted).

See Also:

• getPaint()

getStroke

public Stroke getStroke()

Returns the stroke.

Returns:

The stroke (never null).

See Also:

• setStroke(Stroke)

setStroke

public void setStroke(Stroke stroke)

Sets the stroke and sends a MarkerChangeEvent to all registered listeners.

Parameters:

stroke - the stroke (nullnot permitted).

See Also:

• getStroke()

getOutlinePaint

public Paint getOutlinePaint()

Returns the outline paint.

Returns:

The outline paint (possibly null).

See Also:

• setOutlinePaint(Paint)

setOutlinePaint

public void setOutlinePaint(Paint paint)

Sets the outline paint and sends a MarkerChangeEvent to all registered listeners.

Parameters:

paint - the paint (null permitted).

See Also:

• getOutlinePaint()

getOutlineStroke

public Stroke getOutlineStroke()

Returns the outline stroke.

Returns:

The outline stroke (possibly null).

See Also:

• setOutlineStroke(Stroke)

setOutlineStroke

public void setOutlineStroke(Stroke stroke)

Sets the outline stroke and sends a MarkerChangeEvent to all registered listeners.

Parameters:

stroke - the stroke (null permitted).

See Also:

• getOutlineStroke()

getAlpha

public float getAlpha()

Returns the alpha transparency.

Returns:

The alpha transparency.

See Also:

• setAlpha(float)

setAlpha

public void setAlpha(float alpha)

Sets the alpha transparency that should be used when drawing the marker, and sends a MarkerChangeEvent to all registered listeners. The alpha transparency is a value in the range 0.0f (completely transparent) to 1.0f (completely opaque).

Parameters:

alpha - the alpha transparency (must be in the range 0.0f to 1.0f).

Throws:

IllegalArgumentException - if alpha is not in the specified range.

See Also:

• getAlpha()

getLabel

public String getLabel()

Returns the label (if null no label is displayed).

Returns:

The label (possibly null).

See Also:

• setLabel(String)

setLabel

public void setLabel(String label)

Sets the label (if null no label is displayed) and sends a MarkerChangeEvent to all registered listeners.

Parameters:

label - the label (null permitted).

See Also:

• getLabel()

getLabelFont

public Font getLabelFont()

Returns the label font.

Returns:

The label font (never null).

See Also:

• setLabelFont(Font)

setLabelFont

public void setLabelFont(Font font)

Sets the label font and sends a MarkerChangeEvent to all registered listeners.

Parameters:

font - the font (null not permitted).

See Also:

• getLabelFont()

getLabelPaint

public Paint getLabelPaint()

Returns the label paint.

Returns:

The label paint (never null).

See Also:

• setLabelPaint(Paint)

setLabelPaint

public void setLabelPaint(Paint paint)

Sets the label paint and sends a MarkerChangeEvent to all registered listeners.

Parameters:

paint - the paint (null not permitted).

See Also:

• getLabelPaint()

getLabelBackgroundColor

public Color getLabelBackgroundColor()

Returns the label background color. The default value is Color(100, 100, 100, 100)..

Returns:

The label background color (never null).

setLabelBackgroundColor

public void setLabelBackgroundColor(Color color)

Sets the label background color.

Parameters:

color - the color (null not permitted).

getLabelAnchor

public RectangleAnchor getLabelAnchor()

Returns the label anchor. This defines the position of the label anchor, relative to the bounds of the marker.

Returns:

The label anchor (never null).

See Also:

• setLabelAnchor(RectangleAnchor)

setLabelAnchor

public void setLabelAnchor(RectangleAnchor anchor)

Sets the label anchor and sends a MarkerChangeEvent to all registered listeners. The anchor defines the position of the label anchor, relative to the bounds of the marker.

Parameters:

anchor - the anchor (null not permitted).

See Also:

• getLabelAnchor()

getLabelOffset

public RectangleInsets getLabelOffset()

Returns the label offset.

Returns:

The label offset (never null).

See Also:

• setLabelOffset(RectangleInsets)

setLabelOffset

public void setLabelOffset(RectangleInsets offset)

Sets the label offset and sends a MarkerChangeEvent to all registered listeners.

Parameters:

offset - the label offset (null not permitted).

See Also:

• getLabelOffset()

getLabelOffsetType

public LengthAdjustmentType getLabelOffsetType()

Returns the label offset type.

Returns:

The type (never null).

See Also:

• setLabelOffsetType(LengthAdjustmentType)

setLabelOffsetType

public void setLabelOffsetType(LengthAdjustmentType adj)

Sets the label offset type and sends a MarkerChangeEvent to all registered listeners.

Parameters:

adj - the type (null not permitted).

See Also:

• getLabelOffsetType()

getLabelTextAnchor

public TextAnchor getLabelTextAnchor()

Returns the label text anchor.

Returns:

The label text anchor (never null).

See Also:

• setLabelTextAnchor(TextAnchor)

setLabelTextAnchor

public void setLabelTextAnchor(TextAnchor anchor)

Sets the label text anchor and sends a MarkerChangeEvent to all registered listeners.

Parameters:

anchor - the label text anchor (null not permitted).

See Also:

• getLabelTextAnchor()

addChangeListener

public void addChangeListener(MarkerChangeListener listener)

Registers an object for notification of changes to the marker.

Parameters:

listener - the object to be registered.

See Also:

• removeChangeListener(MarkerChangeListener)

removeChangeListener

public void removeChangeListener(MarkerChangeListener listener)

Unregisters an object for notification of changes to the marker.

Parameters:

listener - the object to be unregistered.

See Also:

• addChangeListener(MarkerChangeListener)

notifyListeners

public void notifyListeners(MarkerChangeEvent event)

Notifies all registered listeners that the marker has been modified.

Parameters:

event - information about the change event.

getListeners

public EventListener[] getListeners(Class listenerType)

Returns an array containing all the listeners of the specified type.

Parameters:

listenerType - the listener type.

Returns:

The array of listeners.

equals

public boolean equals(Object obj)

Tests the marker for equality with an arbitrary object.

Overrides:

equals in class Object

Parameters:

obj - the object (null permitted).

Returns:

A boolean.

canEqual

public boolean canEqual(Object other)

Ensures symmetry between super/subclass implementations of equals. For more detail, see http://jqno.nl/equalsverifier/manual/inheritance.

Parameters:

other - Object

Returns:

true ONLY if the parameter is THIS class type

hashCode

public int hashCode()

Overrides:

hashCode in class Object

clone

public Object clone()
             throws CloneNotSupportedException

Creates a clone of the marker.

Overrides:

clone in class Object

Returns:

A clone.

Throws:

CloneNotSupportedException - never.