Package org.jfree.chart.plot

Class MeterPlot

java.lang.Object

org.jfree.chart.plot.Plot

org.jfree.chart.plot.MeterPlot

All Implemented Interfaces:

Serializable, Cloneable, EventListener, AnnotationChangeListener, AxisChangeListener, MarkerChangeListener, LegendItemSource, PublicCloneable, DatasetChangeListener

public class MeterPlot
extends Plot
implements Serializable, Cloneable

A plot that displays a single value in the form of a needle on a dial. Defined ranges (for example, 'normal', 'warning' and 'critical') can be highlighted on the dial.

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static final float	DEFAULT_BORDER_SIZE	The default border size.
static final float	DEFAULT_CIRCLE_SIZE	The default circle size.
static final Font	DEFAULT_LABEL_FONT	The default label font.
static final int	DEFAULT_METER_ANGLE	The default meter angle.
protected static ResourceBundle	localizationResources	The resourceBundle for the localization.

Fields inherited from class org.jfree.chart.plot.Plot

DEFAULT_BACKGROUND_ALPHA, DEFAULT_BACKGROUND_PAINT, DEFAULT_FOREGROUND_ALPHA, DEFAULT_INSETS, DEFAULT_LEGEND_ITEM_BOX, DEFAULT_LEGEND_ITEM_CIRCLE, DEFAULT_OUTLINE_PAINT, DEFAULT_OUTLINE_STROKE, MINIMUM_HEIGHT_TO_DRAW, MINIMUM_WIDTH_TO_DRAW, ZERO

Constructor Summary

Constructors

Constructor	Description
MeterPlot()	Creates a new plot with a default range of 0 to 100 and no value to display.
MeterPlot(ValueDataset dataset)	Creates a new plot that displays the value from the supplied dataset.

Method Summary

Modifier and Type	Method	Description
void	addInterval(MeterInterval interval)	Adds an interval and sends a PlotChangeEvent to all registered listeners.
void	clearIntervals()	Clears the intervals for the plot and sends a PlotChangeEvent to all registered listeners.
Object	clone()	Returns an independent copy (clone) of the plot.
void	draw(Graphics2D g2, Rectangle2D area, Point2D anchor, PlotState parentState, PlotRenderingInfo info)	Draws the plot on a Java 2D graphics device (such as the screen or a printer).
protected void	drawArc(Graphics2D g2, Rectangle2D area, double minValue, double maxValue, Paint paint, Stroke stroke)	Draws an arc.
protected void	drawArcForInterval(Graphics2D g2, Rectangle2D meterArea, MeterInterval interval)	Draws the arc to represent an interval.
protected void	drawTick(Graphics2D g2, Rectangle2D meterArea, double value)	Draws a tick.
protected void	drawTick(Graphics2D g2, Rectangle2D meterArea, double value, boolean label)	Draws a tick on the dial.
protected void	drawTicks(Graphics2D g2, Rectangle2D meterArea, double minValue, double maxValue)	Draws the ticks that subdivide the overall range.
protected void	drawValueLabel(Graphics2D g2, Rectangle2D area)	Draws the value label just below the center of the dial.
boolean	equals(Object obj)	Tests the plot for equality with an arbitrary object.
protected void	fillArc(Graphics2D g2, Rectangle2D area, double minValue, double maxValue, Paint paint, boolean dial)	Fills an arc on the dial between the given values.
ValueDataset	getDataset()	Returns the dataset for the plot.
Paint	getDialBackgroundPaint()	Returns the paint for the dial background.
Paint	getDialOutlinePaint()	Returns the dial outline paint.
DialShape	getDialShape()	Returns the dial shape.
boolean	getDrawBorder()	Returns a flag that controls whether or not a rectangular border is drawn around the plot area.
List<MeterInterval>	getIntervals()	Returns an unmodifiable list of the intervals for the plot.
LegendItemCollection	getLegendItems()	Returns an item for each interval.
int	getMeterAngle()	Returns the meter angle in degrees.
Paint	getNeedlePaint()	Returns the paint for the needle.
String	getPlotType()	Returns a short string describing the type of plot.
Range	getRange()	Returns the overall range for the dial.
Font	getTickLabelFont()	Returns the tick label font.
NumberFormat	getTickLabelFormat()	Returns the tick label format.
Paint	getTickLabelPaint()	Returns the tick label paint.
boolean	getTickLabelsVisible()	Returns the flag that determines whether or not tick labels are visible.
Paint	getTickPaint()	Returns the paint used to draw the ticks around the dial.
double	getTickSize()	Returns the tick size (the interval between ticks on the dial).
String	getUnits()	Returns a string describing the units for the dial.
Font	getValueFont()	Returns the font for the value label.
Paint	getValuePaint()	Returns the paint for the value label.
boolean	isValueVisible()	Returns the flag that controls whether or not the value is visible.
void	setDataset(ValueDataset dataset)	Sets the dataset for the plot, replacing the existing dataset if there is one, and triggers a PlotChangeEvent.
void	setDialBackgroundPaint(Paint paint)	Sets the paint used to fill the dial background.
void	setDialOutlinePaint(Paint paint)	Sets the dial outline paint and sends a PlotChangeEvent to all registered listeners.
void	setDialShape(DialShape shape)	Sets the dial shape and sends a PlotChangeEvent to all registered listeners.
void	setDrawBorder(boolean draw)	Sets the flag that controls whether or not a rectangular border is drawn around the plot area and sends a PlotChangeEvent to all registered listeners.
void	setMeterAngle(int angle)	Sets the angle (in degrees) for the whole range of the dial and sends a PlotChangeEvent to all registered listeners.
void	setNeedlePaint(Paint paint)	Sets the paint used to display the needle and sends a PlotChangeEvent to all registered listeners.
void	setRange(Range range)	Sets the range for the dial and sends a PlotChangeEvent to all registered listeners.
void	setTickLabelFont(Font font)	Sets the tick label font and sends a PlotChangeEvent to all registered listeners.
void	setTickLabelFormat(NumberFormat format)	Sets the format for the tick labels and sends a PlotChangeEvent to all registered listeners.
void	setTickLabelPaint(Paint paint)	Sets the tick label paint and sends a PlotChangeEvent to all registered listeners.
void	setTickLabelsVisible(boolean visible)	Sets the flag that controls whether or not the tick labels are visible and sends a PlotChangeEvent to all registered listeners.
void	setTickPaint(Paint paint)	Sets the paint used to draw the tick labels around the dial and sends a PlotChangeEvent to all registered listeners.
void	setTickSize(double size)	Sets the tick size and sends a PlotChangeEvent to all registered listeners.
void	setUnits(String units)	Sets the units for the dial and sends a PlotChangeEvent to all registered listeners.
void	setValueFont(Font font)	Sets the font used to display the value label and sends a PlotChangeEvent to all registered listeners.
void	setValuePaint(Paint paint)	Sets the paint used to display the value label and sends a PlotChangeEvent to all registered listeners.
void	setValueVisible(boolean valueVisible)	Sets the flag that controls whether or not the value is visible and sends a change event to all registered listeners.
double	valueToAngle(double value)	Translates a data value to an angle on the dial.
void	zoom(double percent)	A zoom method that does nothing.

Methods inherited from class org.jfree.chart.plot.Plot

addChangeListener, annotationChanged, axisChanged, canEqual, createAndAddEntity, datasetChanged, drawBackground, drawBackgroundImage, drawNoDataMessage, drawOutline, fetchElementHintingFlag, fillBackground, fillBackground, fireChangeEvent, getBackgroundAlpha, getBackgroundImage, getBackgroundImageAlignment, getBackgroundImageAlpha, getBackgroundPaint, getChart, getDatasetGroup, getDrawingSupplier, getForegroundAlpha, getInsets, getNoDataMessage, getNoDataMessageFont, getNoDataMessagePaint, getOutlinePaint, getOutlineStroke, getParent, getRectX, getRectY, getRootPlot, handleClick, hashCode, isNotify, isOutlineVisible, isSubplot, markerChanged, notifyListeners, removeChangeListener, resolveDomainAxisLocation, resolveRangeAxisLocation, setBackgroundAlpha, setBackgroundImage, setBackgroundImageAlignment, setBackgroundImageAlpha, setBackgroundPaint, setChart, setDatasetGroup, setDrawingSupplier, setDrawingSupplier, setForegroundAlpha, setInsets, setInsets, setNoDataMessage, setNoDataMessageFont, setNoDataMessagePaint, setNotify, setOutlinePaint, setOutlineStroke, setOutlineVisible, setParent

Methods inherited from class java.lang.Object

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

Field Details

DEFAULT_METER_ANGLE

public static final int DEFAULT_METER_ANGLE

The default meter angle.

See Also:

• Constant Field Values

DEFAULT_BORDER_SIZE

public static final float DEFAULT_BORDER_SIZE

The default border size.

See Also:

• Constant Field Values

DEFAULT_CIRCLE_SIZE

public static final float DEFAULT_CIRCLE_SIZE

The default circle size.

See Also:

• Constant Field Values

DEFAULT_LABEL_FONT

public static final Font DEFAULT_LABEL_FONT

The default label font.

localizationResources

protected static ResourceBundle localizationResources

The resourceBundle for the localization.

Constructor Details

MeterPlot

public MeterPlot()

Creates a new plot with a default range of 0 to 100 and no value to display.

MeterPlot

public MeterPlot(ValueDataset dataset)

Creates a new plot that displays the value from the supplied dataset.

Parameters:

dataset - the dataset (null permitted).

Method Details

getDialShape

public DialShape getDialShape()

Returns the dial shape. The default is DialShape.CIRCLE).

Returns:

The dial shape (never null).

See Also:

• setDialShape(DialShape)

setDialShape

public void setDialShape(DialShape shape)

Sets the dial shape and sends a PlotChangeEvent to all registered listeners.

Parameters:

shape - the shape (null not permitted).

See Also:

• getDialShape()

getMeterAngle

public int getMeterAngle()

Returns the meter angle in degrees. This defines, in part, the shape of the dial. The default is 270 degrees.

Returns:

The meter angle (in degrees).

See Also:

• setMeterAngle(int)

setMeterAngle

public void setMeterAngle(int angle)

Sets the angle (in degrees) for the whole range of the dial and sends a PlotChangeEvent to all registered listeners.

Parameters:

angle - the angle (in degrees, in the range 1-360).

See Also:

• getMeterAngle()

getRange

public Range getRange()

Returns the overall range for the dial.

Returns:

The overall range (never null).

See Also:

• setRange(Range)

setRange

public void setRange(Range range)

Sets the range for the dial and sends a PlotChangeEvent to all registered listeners.

Parameters:

range - the range (null not permitted and zero-length ranges not permitted).

See Also:

• getRange()

getTickSize

public double getTickSize()

Returns the tick size (the interval between ticks on the dial).

Returns:

The tick size.

See Also:

• setTickSize(double)

setTickSize

public void setTickSize(double size)

Sets the tick size and sends a PlotChangeEvent to all registered listeners.

Parameters:

size - the tick size (must be > 0).

See Also:

• getTickSize()

getTickPaint

public Paint getTickPaint()

Returns the paint used to draw the ticks around the dial.

Returns:

The paint used to draw the ticks around the dial (never null).

See Also:

• setTickPaint(Paint)

setTickPaint

public void setTickPaint(Paint paint)

Sets the paint used to draw the tick labels around the dial and sends a PlotChangeEvent to all registered listeners.

Parameters:

paint - the paint (null not permitted).

See Also:

• getTickPaint()

getUnits

public String getUnits()

Returns a string describing the units for the dial.

Returns:

The units (possibly null).

See Also:

• setUnits(String)

setUnits

public void setUnits(String units)

Sets the units for the dial and sends a PlotChangeEvent to all registered listeners.

Parameters:

units - the units (null permitted).

See Also:

• getUnits()

getNeedlePaint

public Paint getNeedlePaint()

Returns the paint for the needle.

Returns:

The paint (never null).

See Also:

• setNeedlePaint(Paint)

setNeedlePaint

public void setNeedlePaint(Paint paint)

Sets the paint used to display the needle and sends a PlotChangeEvent to all registered listeners.

Parameters:

paint - the paint (null not permitted).

See Also:

• getNeedlePaint()

getTickLabelsVisible

public boolean getTickLabelsVisible()

Returns the flag that determines whether or not tick labels are visible.

Returns:

The flag.

See Also:

• setTickLabelsVisible(boolean)

setTickLabelsVisible

public void setTickLabelsVisible(boolean visible)

Sets the flag that controls whether or not the tick labels are visible and sends a PlotChangeEvent to all registered listeners.

Parameters:

visible - the flag.

See Also:

• getTickLabelsVisible()

getTickLabelFont

public Font getTickLabelFont()

Returns the tick label font.

Returns:

The font (never null).

See Also:

• setTickLabelFont(Font)

setTickLabelFont

public void setTickLabelFont(Font font)

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

Parameters:

font - the font (null not permitted).

See Also:

• getTickLabelFont()

getTickLabelPaint

public Paint getTickLabelPaint()

Returns the tick label paint.

Returns:

The paint (never null).

See Also:

• setTickLabelPaint(Paint)

setTickLabelPaint

public void setTickLabelPaint(Paint paint)

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

Parameters:

paint - the paint (null not permitted).

See Also:

• getTickLabelPaint()

isValueVisible

public boolean isValueVisible()

Returns the flag that controls whether or not the value is visible. The default value is true.

Returns:

A flag.

Since:

1.5.4

See Also:

• setValueVisible(boolean)

setValueVisible

public void setValueVisible(boolean valueVisible)

Sets the flag that controls whether or not the value is visible and sends a change event to all registered listeners.

Parameters:

valueVisible - the new flag value.

Since:

1.5.4

See Also:

• isValueVisible()

getTickLabelFormat

public NumberFormat getTickLabelFormat()

Returns the tick label format.

Returns:

The tick label format (never null).

See Also:

• setTickLabelFormat(NumberFormat)

setTickLabelFormat

public void setTickLabelFormat(NumberFormat format)

Sets the format for the tick labels and sends a PlotChangeEvent to all registered listeners.

Parameters:

format - the format (null not permitted).

See Also:

• getTickLabelFormat()

getValueFont

public Font getValueFont()

Returns the font for the value label.

Returns:

The font (never null).

See Also:

• setValueFont(Font)

setValueFont

public void setValueFont(Font font)

Sets the font used to display the value label and sends a PlotChangeEvent to all registered listeners.

Parameters:

font - the font (null not permitted).

See Also:

• getValueFont()

getValuePaint

public Paint getValuePaint()

Returns the paint for the value label.

Returns:

The paint (never null).

See Also:

• setValuePaint(Paint)

setValuePaint

public void setValuePaint(Paint paint)

Sets the paint used to display the value label and sends a PlotChangeEvent to all registered listeners.

Parameters:

paint - the paint (null not permitted).

See Also:

• getValuePaint()

getDialBackgroundPaint

public Paint getDialBackgroundPaint()

Returns the paint for the dial background.

Returns:

The paint (possibly null).

See Also:

• setDialBackgroundPaint(Paint)

setDialBackgroundPaint

public void setDialBackgroundPaint(Paint paint)

Sets the paint used to fill the dial background. Set this to null for no background.

Parameters:

paint - the paint (null permitted).

See Also:

• getDialBackgroundPaint()

getDrawBorder

public boolean getDrawBorder()

Returns a flag that controls whether or not a rectangular border is drawn around the plot area.

Returns:

A flag.

See Also:

• setDrawBorder(boolean)

setDrawBorder

public void setDrawBorder(boolean draw)

Sets the flag that controls whether or not a rectangular border is drawn around the plot area and sends a PlotChangeEvent to all registered listeners.

Parameters:

draw - the flag.

See Also:

• getDrawBorder()

getDialOutlinePaint

public Paint getDialOutlinePaint()

Returns the dial outline paint.

Returns:

The paint.

See Also:

• setDialOutlinePaint(Paint)

setDialOutlinePaint

public void setDialOutlinePaint(Paint paint)

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

Parameters:

paint - the paint.

See Also:

• getDialOutlinePaint()

getDataset

public ValueDataset getDataset()

Returns the dataset for the plot.

Returns:

The dataset (possibly null).

See Also:

• setDataset(ValueDataset)

setDataset

public void setDataset(ValueDataset dataset)

Sets the dataset for the plot, replacing the existing dataset if there is one, and triggers a PlotChangeEvent.

Parameters:

dataset - the dataset (null permitted).

See Also:

• getDataset()

getIntervals

public List<MeterInterval> getIntervals()

Returns an unmodifiable list of the intervals for the plot.

Returns:

A list.

See Also:

• addInterval(MeterInterval)

addInterval

public void addInterval(MeterInterval interval)

Adds an interval and sends a PlotChangeEvent to all registered listeners.

Parameters:

interval - the interval (null not permitted).

See Also:

• getIntervals()
• clearIntervals()

clearIntervals

public void clearIntervals()

Clears the intervals for the plot and sends a PlotChangeEvent to all registered listeners.

See Also:

• addInterval(MeterInterval)

getLegendItems

public LegendItemCollection getLegendItems()

Returns an item for each interval.

Specified by:

getLegendItems in interface LegendItemSource

Overrides:

getLegendItems in class Plot

Returns:

A collection of legend items.

draw

public void draw(Graphics2D g2,
 Rectangle2D area,
 Point2D anchor,
 PlotState parentState,
 PlotRenderingInfo info)

Draws the plot on a Java 2D graphics device (such as the screen or a printer).

Specified by:

draw in class Plot

Parameters:

g2 - the graphics device.

area - the area within which the plot should be drawn.

anchor - the anchor point (null permitted).

parentState - the state from the parent plot, if there is one.

info - collects info about the drawing.

drawArcForInterval

protected void drawArcForInterval(Graphics2D g2,
 Rectangle2D meterArea,
 MeterInterval interval)

Draws the arc to represent an interval.

Parameters:

g2 - the graphics device.

meterArea - the drawing area.

interval - the interval.

drawArc

protected void drawArc(Graphics2D g2,
 Rectangle2D area,
 double minValue,
 double maxValue,
 Paint paint,
 Stroke stroke)

Draws an arc.

Parameters:

g2 - the graphics device.

area - the plot area.

minValue - the minimum value.

maxValue - the maximum value.

paint - the paint.

stroke - the stroke.

fillArc

protected void fillArc(Graphics2D g2,
 Rectangle2D area,
 double minValue,
 double maxValue,
 Paint paint,
 boolean dial)

Fills an arc on the dial between the given values.

Parameters:

g2 - the graphics device.

area - the plot area.

minValue - the minimum data value.

maxValue - the maximum data value.

paint - the background paint (null not permitted).

dial - a flag that indicates whether the arc represents the whole dial.

valueToAngle

public double valueToAngle(double value)

Translates a data value to an angle on the dial.

Parameters:

value - the value.

Returns:

The angle on the dial.

drawTicks

protected void drawTicks(Graphics2D g2,
 Rectangle2D meterArea,
 double minValue,
 double maxValue)

Draws the ticks that subdivide the overall range.

Parameters:

g2 - the graphics device.

meterArea - the meter area.

minValue - the minimum value.

maxValue - the maximum value.

drawTick

protected void drawTick(Graphics2D g2,
 Rectangle2D meterArea,
 double value)

Draws a tick.

Parameters:

g2 - the graphics device.

meterArea - the meter area.

value - the value.

drawTick

protected void drawTick(Graphics2D g2,
 Rectangle2D meterArea,
 double value,
 boolean label)

Draws a tick on the dial.

Parameters:

g2 - the graphics device.

meterArea - the meter area.

value - the tick value.

label - a flag that controls whether or not a value label is drawn.

drawValueLabel

protected void drawValueLabel(Graphics2D g2,
 Rectangle2D area)

Draws the value label just below the center of the dial.

Parameters:

g2 - the graphics device.

area - the plot area.

getPlotType

public String getPlotType()

Returns a short string describing the type of plot.

Specified by:

getPlotType in class Plot

Returns:

A string describing the type of plot.

zoom

public void zoom(double percent)

A zoom method that does nothing. Plots are required to support the zoom operation. In the case of a meter plot, it doesn't make sense to zoom in or out, so the method is empty.

Overrides:

zoom in class Plot

Parameters:

percent - The zoom percentage.

equals

public boolean equals(Object obj)

Tests the plot for equality with an arbitrary object. Note that the dataset is ignored for the purposes of testing equality.

Overrides:

equals in class Plot

Parameters:

obj - the object (null permitted).

Returns:

A boolean.

clone

public Object clone()
             throws CloneNotSupportedException

Returns an independent copy (clone) of the plot. The dataset is NOT cloned - both the original and the clone will have a reference to the same dataset.

Specified by:

clone in interface PublicCloneable

Overrides:

clone in class Plot

Returns:

A clone.

Throws:

CloneNotSupportedException - if some component of the plot cannot be cloned.