public class

LogAxis

extends ValueAxis

java.lang.Object
↳	org.jfree.chart.axis.Axis
	↳	org.jfree.chart.axis.ValueAxis
		↳	org.jfree.chart.axis.LogAxis

Class Overview

A numerical axis that uses a logarithmic scale. The class is an alternative to the LogarithmicAxis class.

Summary

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Inherited Constants

From class org.jfree.chart.axis.ValueAxis

From class org.jfree.chart.axis.Axis

[Expand]

Inherited Fields

From class org.jfree.chart.axis.ValueAxis

From class org.jfree.chart.axis.Axis

Public Constructors
	LogAxis() Creates a new `LogAxis` with no label.
	LogAxis(String label) Creates a new `LogAxis` with the given label.

Public Methods
double	calculateLog(double value) Calculates the log of the given value, using the current base.
double	calculateValue(double log) Calculates the value from a given log.
void	configure() Configures the axis.
static TickUnitSource	createLogTickUnits(Locale locale) Returns a collection of tick units for log (base 10) values.
AxisState	draw(Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState) Draws the axis on a Java 2D graphics device (such as the screen or a printer).
boolean	equals(Object obj) Tests this axis for equality with an arbitrary object.
double	exponentLengthToJava2D(double length, Rectangle2D area, RectangleEdge edge) Converts a length in data coordinates into the corresponding length in Java2D coordinates.
double	getBase() Returns the base for the logarithm calculation.
NumberFormat	getNumberFormatOverride() Returns the number format override.
double	getSmallestValue() Returns the smallest value represented by the axis.
NumberTickUnit	getTickUnit() Returns the current tick unit.
int	hashCode() Returns a hash code for this instance.
double	java2DToValue(double java2DValue, Rectangle2D area, RectangleEdge edge) Converts a Java2D coordinate to an axis value, assuming that the axis covers the specified `edge` of the `area`.
void	pan(double percent) Slides the axis range by the specified percentage.
List	refreshTicks(Graphics2D g2, AxisState state, Rectangle2D dataArea, RectangleEdge edge) Calculates the positions of the tick labels for the axis, storing the results in the tick label list (ready for drawing).
void	setBase(double base) Sets the base for the logarithm calculation and sends an `AxisChangeEvent` to all registered listeners.
void	setNumberFormatOverride(NumberFormat formatter) Sets the number format override.
void	setSmallestValue(double value) Sets the smallest value represented by the axis and sends an `AxisChangeEvent` to all registered listeners.
void	setTickUnit(NumberTickUnit unit) Sets the tick unit for the axis and sends an `AxisChangeEvent` to all registered listeners.
void	setTickUnit(NumberTickUnit unit, boolean notify, boolean turnOffAutoSelect) Sets the tick unit for the axis and, if requested, sends an `AxisChangeEvent` to all registered listeners.
double	valueToJava2D(double value, Rectangle2D area, RectangleEdge edge) Converts a value on the axis scale to a Java2D coordinate relative to the given `area`, based on the axis running along the specified `edge`.
void	zoomRange(double lowerPercent, double upperPercent) Zooms in on the current range.

Protected Methods
void	autoAdjustRange() Adjusts the axis range to match the data range that the axis is required to display.
String	createTickLabel(double value) Creates a tick label for the specified value.
double	estimateMaximumTickLabelHeight(Graphics2D g2) Estimates the maximum tick label height.
double	estimateMaximumTickLabelWidth(Graphics2D g2, TickUnit unit) Estimates the maximum width of the tick labels, assuming the specified tick unit is used.
List	refreshTicksHorizontal(Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge) Returns a list of ticks for an axis at the top or bottom of the chart.
List	refreshTicksVertical(Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge) Returns a list of ticks for an axis at the left or right of the chart.
void	selectAutoTickUnit(Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge) Selects an appropriate tick value for the axis.
void	selectHorizontalAutoTickUnit(Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge) Selects an appropriate tick value for the axis.
void	selectVerticalAutoTickUnit(Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge) Selects an appropriate tick value for the axis.

[Expand]

Inherited Methods

From class org.jfree.chart.axis.ValueAxis

abstract void	autoAdjustRange() Automatically sets the axis range to fit the range of values in the dataset.
float[]	calculateAnchorPoint(ValueTick tick, double cursor, Rectangle2D dataArea, RectangleEdge edge) Calculates the anchor point for a tick label.
void	centerRange(double value) Centers the axis range about the specified value and sends an `AxisChangeEvent` to all registered listeners.
Object	clone() Returns a clone of the object.
void	drawAxisLine(Graphics2D g2, double cursor, Rectangle2D dataArea, RectangleEdge edge) Draws an axis line at the current cursor position and edge.
AxisState	drawTickMarksAndLabels(Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge) Draws the axis line, tick marks and tick mark labels.
boolean	equals(Object obj) Tests the axis for equality with an arbitrary object.
double	findMaximumTickLabelHeight(List ticks, Graphics2D g2, Rectangle2D drawArea, boolean vertical) A utility method for determining the height of the tallest tick label.
double	findMaximumTickLabelWidth(List ticks, Graphics2D g2, Rectangle2D drawArea, boolean vertical) A utility method for determining the width of the widest tick label.
double	getAutoRangeMinimumSize() Returns the minimum size allowed for the axis range when it is automatically calculated.
int	getAutoTickIndex() Returns the auto tick index.
Range	getDefaultAutoRange() Returns the default auto range.
Shape	getDownArrow() Returns a shape that can be displayed as an arrow pointing downwards at the end of an axis line.
double	getFixedAutoRange() Returns the fixed auto range.
Shape	getLeftArrow() Returns a shape that can be displayed as an arrow pointing left at the end of an axis line.
double	getLowerBound() Returns the lower bound of the axis range.
double	getLowerMargin() Returns the lower margin for the axis, expressed as a percentage of the axis range.
int	getMinorTickCount() Returns the number of minor tick marks to display.
Range	getRange() Returns the range for the axis.
Shape	getRightArrow() Returns a shape that can be displayed as an arrow pointing right at the end of an axis line.
TickUnitSource	getStandardTickUnits() Returns the source for obtaining standard tick units for the axis.
Shape	getUpArrow() Returns a shape that can be displayed as an arrow pointing upwards at the end of an axis line.
double	getUpperBound() Returns the upper bound for the axis range.
double	getUpperMargin() Returns the upper margin for the axis, expressed as a percentage of the axis range.
boolean	isAutoRange() Returns the flag that controls whether or not the axis range is automatically adjusted to fit the data values.
boolean	isAutoTickUnitSelection() Returns a flag indicating whether or not the tick unit is automatically selected from a range of standard tick units.
boolean	isInverted() Returns a flag that controls the direction of values on the axis.
boolean	isNegativeArrowVisible() Returns a flag that controls whether or not the axis line has an arrow drawn that points in the negative direction for the axis.
boolean	isPositiveArrowVisible() Returns a flag that controls whether or not the axis line has an arrow drawn that points in the positive direction for the axis.
boolean	isVerticalTickLabels() Returns `true` if the tick labels should be rotated (to vertical), and `false` otherwise.
abstract double	java2DToValue(double java2DValue, Rectangle2D area, RectangleEdge edge) Converts a coordinate in Java2D space to the corresponding data value, assuming that the axis runs along one edge of the specified dataArea.
double	lengthToJava2D(double length, Rectangle2D area, RectangleEdge edge) Converts a length in data coordinates into the corresponding length in Java2D coordinates.
void	pan(double percent) Slides the axis range by the specified percentage.
AxisSpace	reserveSpace(Graphics2D g2, Plot plot, Rectangle2D plotArea, RectangleEdge edge, AxisSpace space) Returns the space required to draw the axis.
void	resizeRange(double percent) Increases or decreases the axis range by the specified percentage about the central value and sends an `AxisChangeEvent` to all registered listeners.
void	resizeRange(double percent, double anchorValue) Increases or decreases the axis range by the specified percentage about the specified anchor value and sends an `AxisChangeEvent` to all registered listeners.
void	resizeRange2(double percent, double anchorValue) Increases or decreases the axis range by the specified percentage about the specified anchor value and sends an `AxisChangeEvent` to all registered listeners.
void	setAutoRange(boolean auto, boolean notify) Sets the auto range attribute.
void	setAutoRange(boolean auto) Sets a flag that determines whether or not the axis range is automatically adjusted to fit the data, and notifies registered listeners that the axis has been modified.
void	setAutoRangeMinimumSize(double size) Sets the auto range minimum size and sends an `AxisChangeEvent` to all registered listeners.
void	setAutoRangeMinimumSize(double size, boolean notify) Sets the minimum size allowed for the axis range when it is automatically calculated.
void	setAutoTickIndex(int index) Sets the auto tick index.
void	setAutoTickUnitSelection(boolean flag, boolean notify) Sets a flag indicating whether or not the tick unit is automatically selected from a range of standard tick units.
void	setAutoTickUnitSelection(boolean flag) Sets a flag indicating whether or not the tick unit is automatically selected from a range of standard tick units.
void	setDefaultAutoRange(Range range) Sets the default auto range and sends an `AxisChangeEvent` to all registered listeners.
void	setDownArrow(Shape arrow) Sets the shape that can be displayed as an arrow pointing downwards at the end of an axis line and sends an `AxisChangeEvent` to all registered listeners.
void	setFixedAutoRange(double length) Sets the fixed auto range for the axis.
void	setInverted(boolean flag) Sets a flag that controls the direction of values on the axis, and notifies registered listeners that the axis has changed.
void	setLeftArrow(Shape arrow) Sets the shape that can be displayed as an arrow pointing left at the end of an axis line and sends an `AxisChangeEvent` to all registered listeners.
void	setLowerBound(double min) Sets the lower bound for the axis range.
void	setLowerMargin(double margin) Sets the lower margin for the axis (as a percentage of the axis range) and sends an `AxisChangeEvent` to all registered listeners.
void	setMinorTickCount(int count) Sets the number of minor tick marks to display, and sends an `AxisChangeEvent` to all registered listeners.
void	setNegativeArrowVisible(boolean visible) Sets a flag that controls whether or not the axis lines has an arrow drawn that points in the negative direction for the axis, and sends an `AxisChangeEvent` to all registered listeners.
void	setPositiveArrowVisible(boolean visible) Sets a flag that controls whether or not the axis lines has an arrow drawn that points in the positive direction for the axis, and sends an `AxisChangeEvent` to all registered listeners.
void	setRange(Range range, boolean turnOffAutoRange, boolean notify) Sets the range for the axis, if requested, sends an `AxisChangeEvent` to all registered listeners.
void	setRange(double lower, double upper) Sets the axis range and sends an `AxisChangeEvent` to all registered listeners.
void	setRange(Range range) Sets the range attribute and sends an `AxisChangeEvent` to all registered listeners.
void	setRangeAboutValue(double value, double length) Sets the axis range, where the new range is 'size' in length, and centered on 'value'.
void	setRangeWithMargins(Range range) Sets the range for the axis (after first adding the current margins to the specified range) and sends an `AxisChangeEvent` to all registered listeners.
void	setRangeWithMargins(double lower, double upper) Sets the axis range (after first adding the current margins to the range) and sends an `AxisChangeEvent` to all registered listeners.
void	setRangeWithMargins(Range range, boolean turnOffAutoRange, boolean notify) Sets the range for the axis after first adding the current margins to the range and, if requested, sends an `AxisChangeEvent` to all registered listeners.
void	setRightArrow(Shape arrow) Sets the shape that can be displayed as an arrow pointing rightwards at the end of an axis line and sends an `AxisChangeEvent` to all registered listeners.
void	setStandardTickUnits(TickUnitSource source) Sets the source for obtaining standard tick units for the axis and sends an `AxisChangeEvent` to all registered listeners.
void	setUpArrow(Shape arrow) Sets the shape that can be displayed as an arrow pointing upwards at the end of an axis line and sends an `AxisChangeEvent` to all registered listeners.
void	setUpperBound(double max) Sets the upper bound for the axis range, and sends an `AxisChangeEvent` to all registered listeners.
void	setUpperMargin(double margin) Sets the upper margin for the axis (as a percentage of the axis range) and sends an `AxisChangeEvent` to all registered listeners.
void	setVerticalTickLabels(boolean flag) Sets the flag that controls whether the tick labels are displayed vertically (that is, rotated 90 degrees from horizontal).
abstract double	valueToJava2D(double value, Rectangle2D area, RectangleEdge edge) Converts a data value to a coordinate in Java2D space, assuming that the axis runs along one edge of the specified dataArea.
void	zoomRange(double lowerPercent, double upperPercent) Zooms in on the current range.

From class org.jfree.chart.axis.Axis

void	addChangeListener(AxisChangeListener listener) Registers an object for notification of changes to the axis.
Object	clone() Returns a clone of the axis.
abstract void	configure() Configures the axis to work with the current plot.
void	createAndAddEntity(double cursor, AxisState state, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState) Created an entity for the axis.
abstract AxisState	draw(Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState) Draws the axis on a Java 2D graphics device (such as the screen or a printer).
void	drawAxisLine(Graphics2D g2, double cursor, Rectangle2D dataArea, RectangleEdge edge) Draws an axis line at the current cursor position and edge.
AxisState	drawLabel(String label, Graphics2D g2, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, AxisState state) Draws the axis label.
boolean	equals(Object obj) Tests this axis for equality with another object.
void	fireChangeEvent() Sends an `AxisChangeEvent` to all registered listeners.
Paint	getAxisLinePaint() Returns the paint used to draw the axis line.
Stroke	getAxisLineStroke() Returns the stroke used to draw the axis line.
double	getFixedDimension() Returns the fixed dimension for the axis.
String	getLabel() Returns the label for the axis.
double	getLabelAngle() Returns the angle of the axis label.
Rectangle2D	getLabelEnclosure(Graphics2D g2, RectangleEdge edge) Returns a rectangle that encloses the axis label.
Font	getLabelFont() Returns the font for the axis label.
RectangleInsets	getLabelInsets() Returns the insets for the label (that is, the amount of blank space that should be left around the label).
Paint	getLabelPaint() Returns the color/shade used to draw the axis label.
float	getMinorTickMarkInsideLength() Returns the inside length of the minor tick marks.
float	getMinorTickMarkOutsideLength() Returns the outside length of the minor tick marks.
Plot	getPlot() Returns the plot that the axis is assigned to.
Font	getTickLabelFont() Returns the font used for the tick labels (if showing).
RectangleInsets	getTickLabelInsets() Returns the insets for the tick labels.
Paint	getTickLabelPaint() Returns the color/shade used for the tick labels.
float	getTickMarkInsideLength() Returns the inside length of the tick marks.
float	getTickMarkOutsideLength() Returns the outside length of the tick marks.
Paint	getTickMarkPaint() Returns the paint used to draw tick marks (if they are showing).
Stroke	getTickMarkStroke() Returns the stroke used to draw tick marks.
boolean	hasListener(EventListener listener) Returns `true` if the specified object is registered with the dataset as a listener.
boolean	isAxisLineVisible() A flag that controls whether or not the axis line is drawn.
boolean	isMinorTickMarksVisible() Returns the flag that indicates whether or not the minor tick marks are showing.
boolean	isTickLabelsVisible() Returns a flag indicating whether or not the tick labels are visible.
boolean	isTickMarksVisible() Returns the flag that indicates whether or not the tick marks are showing.
boolean	isVisible() Returns `true` if the axis is visible, and `false` otherwise.
void	notifyListeners(AxisChangeEvent event) Notifies all registered listeners that the axis has changed.
abstract List	refreshTicks(Graphics2D g2, AxisState state, Rectangle2D dataArea, RectangleEdge edge) Calculates the positions of the ticks for the axis, storing the results in the tick list (ready for drawing).
void	removeChangeListener(AxisChangeListener listener) Deregisters an object for notification of changes to the axis.
abstract AxisSpace	reserveSpace(Graphics2D g2, Plot plot, Rectangle2D plotArea, RectangleEdge edge, AxisSpace space) Estimates the space (height or width) required to draw the axis.
void	setAxisLinePaint(Paint paint) Sets the paint used to draw the axis line and sends an `AxisChangeEvent` to all registered listeners.
void	setAxisLineStroke(Stroke stroke) Sets the stroke used to draw the axis line and sends an `AxisChangeEvent` to all registered listeners.
void	setAxisLineVisible(boolean visible) Sets a flag that controls whether or not the axis line is visible and sends an `AxisChangeEvent` to all registered listeners.
void	setFixedDimension(double dimension) Sets the fixed dimension for the axis.
void	setLabel(String label) Sets the label for the axis and sends an `AxisChangeEvent` to all registered listeners.
void	setLabelAngle(double angle) Sets the angle for the label and sends an `AxisChangeEvent` to all registered listeners.
void	setLabelFont(Font font) Sets the font for the axis label and sends an `AxisChangeEvent` to all registered listeners.
void	setLabelInsets(RectangleInsets insets) Sets the insets for the axis label, and sends an `AxisChangeEvent` to all registered listeners.
void	setLabelInsets(RectangleInsets insets, boolean notify) Sets the insets for the axis label, and sends an `AxisChangeEvent` to all registered listeners.
void	setLabelPaint(Paint paint) Sets the paint used to draw the axis label and sends an `AxisChangeEvent` to all registered listeners.
void	setMinorTickMarkInsideLength(float length) Sets the inside length of the minor tick marks and sends an `AxisChangeEvent` to all registered listeners.
void	setMinorTickMarkOutsideLength(float length) Sets the outside length of the minor tick marks and sends an `AxisChangeEvent` to all registered listeners.
void	setMinorTickMarksVisible(boolean flag) Sets the flag that indicates whether or not the minor tick marks are showing and sends an `AxisChangeEvent` to all registered listeners.
void	setPlot(Plot plot) Sets a reference to the plot that the axis is assigned to.
void	setTickLabelFont(Font font) Sets the font for the tick labels and sends an `AxisChangeEvent` to all registered listeners.
void	setTickLabelInsets(RectangleInsets insets) Sets the insets for the tick labels and sends an `AxisChangeEvent` to all registered listeners.
void	setTickLabelPaint(Paint paint) Sets the paint used to draw tick labels (if they are showing) and sends an `AxisChangeEvent` to all registered listeners.
void	setTickLabelsVisible(boolean flag) Sets the flag that determines whether or not the tick labels are visible and sends an `AxisChangeEvent` to all registered listeners.
void	setTickMarkInsideLength(float length) Sets the inside length of the tick marks and sends an `AxisChangeEvent` to all registered listeners.
void	setTickMarkOutsideLength(float length) Sets the outside length of the tick marks and sends an `AxisChangeEvent` to all registered listeners.
void	setTickMarkPaint(Paint paint) Sets the paint used to draw tick marks and sends an `AxisChangeEvent` to all registered listeners.
void	setTickMarkStroke(Stroke stroke) Sets the stroke used to draw tick marks and sends an `AxisChangeEvent` to all registered listeners.
void	setTickMarksVisible(boolean flag) Sets the flag that indicates whether or not the tick marks are showing and sends an `AxisChangeEvent` to all registered listeners.
void	setVisible(boolean flag) Sets a flag that controls whether or not the axis is visible and sends an `AxisChangeEvent` to all registered listeners.

From class java.lang.Object

Public Constructors

public LogAxis ()

Creates a new LogAxis with no label.

public LogAxis (String label)

Creates a new LogAxis with the given label.

Parameters

label	the axis label (`null` permitted).

Public Methods

public double calculateLog (double value)

Calculates the log of the given value, using the current base.

Parameters

value	the value.

Returns

The log of the given value.

public double calculateValue (double log)

Calculates the value from a given log.

Parameters

log	the log value (must be > 0.0).

Returns

The value with the given log.

public void configure ()

Configures the axis. This method is typically called when an axis is assigned to a new plot.

public static TickUnitSource createLogTickUnits (Locale locale)

Returns a collection of tick units for log (base 10) values. Uses a given Locale to create the DecimalFormats.

Parameters

locale	the locale to use to represent Numbers.

Returns

A collection of tick units for integer values.

public AxisState draw (Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState)

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

Parameters

g2	the graphics device (`null` not permitted).
cursor	the cursor location (determines where to draw the axis).
plotArea	the area within which the axes and plot should be drawn.
dataArea	the area within which the data should be drawn.
edge	the axis location (`null` not permitted).
plotState	collects information about the plot (`null` permitted).

Returns

The axis state (never null).

public boolean equals (Object obj)

Tests this axis for equality with an arbitrary object.

Parameters

obj	the object (`null` permitted).

Returns

A boolean.

public double exponentLengthToJava2D (double length, Rectangle2D area, RectangleEdge edge)

Converts a length in data coordinates into the corresponding length in Java2D coordinates.

Parameters

length	the length.
area	the plot area.
edge	the edge along which the axis lies.

Returns

The length in Java2D coordinates.

public double getBase ()

Returns the base for the logarithm calculation.

Returns

The base for the logarithm calculation.

public NumberFormat getNumberFormatOverride ()

Returns the number format override. If this is non-null, then it will be used to format the numbers on the axis.

Returns

The number formatter (possibly null).

public double getSmallestValue ()

Returns the smallest value represented by the axis.

Returns

The smallest value represented by the axis.

public NumberTickUnit getTickUnit ()

Returns the current tick unit.

Returns

The current tick unit.

public int hashCode ()

Returns a hash code for this instance.

Returns

A hash code.

public double java2DToValue (double java2DValue, Rectangle2D area, RectangleEdge edge)

Converts a Java2D coordinate to an axis value, assuming that the axis covers the specified edge of the area.

Parameters

java2DValue	the Java2D coordinate.
area	the area.
edge	the edge that the axis belongs to.

Returns

A value along the axis scale.

public void pan (double percent)

Slides the axis range by the specified percentage.

Parameters

percent	the percentage.

public List refreshTicks (Graphics2D g2, AxisState state, Rectangle2D dataArea, RectangleEdge edge)

Calculates the positions of the tick labels for the axis, storing the results in the tick label list (ready for drawing).

Parameters

g2	the graphics device.
state	the axis state.
dataArea	the area in which the plot should be drawn.
edge	the location of the axis.

Returns

A list of ticks.

public void setBase (double base)

Sets the base for the logarithm calculation and sends an AxisChangeEvent to all registered listeners.

Parameters

base	the base value (must be > 1.0).

public void setNumberFormatOverride (NumberFormat formatter)

Sets the number format override. If this is non-null, then it will be used to format the numbers on the axis.

Parameters

formatter	the number formatter (`null` permitted).

public void setSmallestValue (double value)

Sets the smallest value represented by the axis and sends an AxisChangeEvent to all registered listeners.

Parameters

value	the value.

public void setTickUnit (NumberTickUnit unit)

Sets the tick unit for the axis and sends an AxisChangeEvent to all registered listeners. A side effect of calling this method is that the "auto-select" feature for tick units is switched off (you can restore it using the setAutoTickUnitSelection(boolean) method).

Parameters

unit	the new tick unit (`null` not permitted).

public void setTickUnit (NumberTickUnit unit, boolean notify, boolean turnOffAutoSelect)

Sets the tick unit for the axis and, if requested, sends an AxisChangeEvent to all registered listeners. In addition, an option is provided to turn off the "auto-select" feature for tick units (you can restore it using the setAutoTickUnitSelection(boolean) method).

Parameters

unit	the new tick unit (`null` not permitted).
notify	notify listeners?
turnOffAutoSelect	turn off the auto-tick selection?

public double valueToJava2D (double value, Rectangle2D area, RectangleEdge edge)

Converts a value on the axis scale to a Java2D coordinate relative to the given area, based on the axis running along the specified edge.

Parameters

value	the data value.
area	the area.
edge	the edge.

Returns

The Java2D coordinate corresponding to value.

public void zoomRange (double lowerPercent, double upperPercent)

Zooms in on the current range.

Parameters

lowerPercent	the new lower bound.
upperPercent	the new upper bound.

Protected Methods

protected void autoAdjustRange ()

Adjusts the axis range to match the data range that the axis is required to display.

protected String createTickLabel (double value)

Creates a tick label for the specified value. Note that this method was 'private' prior to version 1.0.10.

Parameters

value	the value.

Returns

The label.

protected double estimateMaximumTickLabelHeight (Graphics2D g2)

Estimates the maximum tick label height.

Parameters

g2	the graphics device.

Returns

The maximum height.

protected double estimateMaximumTickLabelWidth (Graphics2D g2, TickUnit unit)

Estimates the maximum width of the tick labels, assuming the specified tick unit is used.

Rather than computing the string bounds of every tick on the axis, we just look at two values: the lower bound and the upper bound for the axis. These two values will usually be representative.

Parameters

g2	the graphics device.
unit	the tick unit to use for calculation.

Returns

The estimated maximum width of the tick labels.

protected List refreshTicksHorizontal (Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge)

Returns a list of ticks for an axis at the top or bottom of the chart.

Parameters

g2	the graphics device.
dataArea	the data area.
edge	the edge.

Returns

A list of ticks.

protected List refreshTicksVertical (Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge)

Returns a list of ticks for an axis at the left or right of the chart.

Parameters

g2	the graphics device.
dataArea	the data area.
edge	the edge.

Returns

A list of ticks.

protected void selectAutoTickUnit (Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge)

Selects an appropriate tick value for the axis. The strategy is to display as many ticks as possible (selected from an array of 'standard' tick units) without the labels overlapping.

Parameters

g2	the graphics device.
dataArea	the area defined by the axes.
edge	the axis location.

protected void selectHorizontalAutoTickUnit (Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge)

Selects an appropriate tick value for the axis. The strategy is to display as many ticks as possible (selected from an array of 'standard' tick units) without the labels overlapping.

Parameters

g2	the graphics device.
dataArea	the area defined by the axes.
edge	the axis location.

protected void selectVerticalAutoTickUnit (Graphics2D g2, Rectangle2D dataArea, RectangleEdge edge)

Selects an appropriate tick value for the axis. The strategy is to display as many ticks as possible (selected from an array of 'standard' tick units) without the labels overlapping.

Parameters

g2	the graphics device.
dataArea	the area in which the plot should be drawn.
edge	the axis location.

Interfaces

Classes

LogAxis

Class Overview

Summary

Public Constructors

public LogAxis ()

public LogAxis (String label)

Parameters

Public Methods

public double calculateLog (double value)

Parameters

Returns

See Also

public double calculateValue (double log)

Parameters

Returns

See Also

public void configure ()

public static TickUnitSource createLogTickUnits (Locale locale)

Parameters

Returns

public AxisState draw (Graphics2D g2, double cursor, Rectangle2D plotArea, Rectangle2D dataArea, RectangleEdge edge, PlotRenderingInfo plotState)

Parameters

Returns

public boolean equals (Object obj)

Parameters

Returns

public double exponentLengthToJava2D (double length, Rectangle2D area, RectangleEdge edge)

Parameters

Returns

public double getBase ()

Returns

See Also

public NumberFormat getNumberFormatOverride ()

Returns

See Also

public double getSmallestValue ()

Returns

See Also

public NumberTickUnit getTickUnit ()

Returns

See Also

public int hashCode ()

Returns

public double java2DToValue (double java2DValue, Rectangle2D area, RectangleEdge edge)

Parameters

Returns

public void pan (double percent)

Parameters

public List refreshTicks (Graphics2D g2, AxisState state, Rectangle2D dataArea, RectangleEdge edge)

Parameters

Returns

public void setBase (double base)

Parameters

See Also

public void setNumberFormatOverride (NumberFormat formatter)

Parameters

See Also

public void setSmallestValue (double value)

Parameters

See Also

public void setTickUnit (NumberTickUnit unit)

Parameters

See Also

public void setTickUnit (NumberTickUnit unit, boolean notify, boolean turnOffAutoSelect)

Parameters

See Also

public double valueToJava2D (double value, Rectangle2D area, RectangleEdge edge)

Parameters

Returns

public void zoomRange (double lowerPercent, double upperPercent)

Parameters

Protected Methods

protected void autoAdjustRange ()

protected String createTickLabel (double value)

Parameters

Returns

protected double estimateMaximumTickLabelHeight (Graphics2D g2)

Parameters