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java.lang.Objectorg.jfree.chart.axis.Axis
org.jfree.chart.axis.ValueAxis
org.jfree.chart.axis.LogAxis
public class LogAxis
A numerical axis that uses a logarithmic scale. The class is an
alternative to the LogarithmicAxis class.
| Field Summary |
|---|
| Fields inherited from class org.jfree.chart.axis.ValueAxis |
|---|
DEFAULT_AUTO_RANGE, DEFAULT_AUTO_RANGE_MINIMUM_SIZE, DEFAULT_AUTO_TICK_UNIT_SELECTION, DEFAULT_INVERTED, DEFAULT_LOWER_BOUND, DEFAULT_LOWER_MARGIN, DEFAULT_RANGE, DEFAULT_UPPER_BOUND, DEFAULT_UPPER_MARGIN, MAXIMUM_TICK_COUNT |
| Constructor Summary | |
|---|---|
LogAxis()
Creates a new LogAxis with no label. |
|
LogAxis(java.lang.String label)
Creates a new LogAxis with the given label. |
|
| Method Summary | |
|---|---|
protected void |
autoAdjustRange()
Adjusts the axis range to match the data range that the axis is required to display. |
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(java.util.Locale locale)
Returns a collection of tick units for log (base 10) values. |
AxisState |
draw(java.awt.Graphics2D g2,
double cursor,
java.awt.geom.Rectangle2D plotArea,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge,
PlotRenderingInfo plotState)
Draws the axis on a Java 2D graphics device (such as the screen or a printer). |
boolean |
equals(java.lang.Object obj)
Tests this axis for equality with an arbitrary object. |
protected double |
estimateMaximumTickLabelHeight(java.awt.Graphics2D g2)
Estimates the maximum tick label height. |
protected double |
estimateMaximumTickLabelWidth(java.awt.Graphics2D g2,
TickUnit unit)
Estimates the maximum width of the tick labels, assuming the specified tick unit is used. |
double |
exponentLengthToJava2D(double length,
java.awt.geom.Rectangle2D area,
org.jfree.ui.RectangleEdge edge)
Converts a length in data coordinates into the corresponding length in Java2D coordinates. |
double |
getBase()
Returns the base for the logarithm calculation. |
int |
getMinorTickCount()
Returns the number of minor tick marks to display. |
java.text.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,
java.awt.geom.Rectangle2D area,
org.jfree.ui.RectangleEdge edge)
Converts a Java2D coordinate to an axis value, assuming that the axis covers the specified edge of the area. |
java.util.List |
refreshTicks(java.awt.Graphics2D g2,
AxisState state,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
Calculates the positions of the tick labels for the axis, storing the results in the tick label list (ready for drawing). |
protected java.util.List |
refreshTicksHorizontal(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
Returns a list of ticks for an axis at the top or bottom of the chart. |
protected java.util.List |
refreshTicksVertical(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
Returns a list of ticks for an axis at the left or right of the chart. |
protected void |
selectAutoTickUnit(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
Selects an appropriate tick value for the axis. |
protected void |
selectHorizontalAutoTickUnit(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
Selects an appropriate tick value for the axis. |
protected void |
selectVerticalAutoTickUnit(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
Selects an appropriate tick value for the axis. |
void |
setBase(double base)
Sets the base for the logarithm calculation 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 |
setNumberFormatOverride(java.text.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,
java.awt.geom.Rectangle2D area,
org.jfree.ui.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. |
| Methods inherited from class java.lang.Object |
|---|
finalize, getClass, notify, notifyAll, toString, wait, wait, wait |
| Constructor Detail |
|---|
public LogAxis()
LogAxis with no label.
public LogAxis(java.lang.String label)
LogAxis with the given label.
label - the axis label (null permitted).| Method Detail |
|---|
public double getBase()
setBase(double)public void setBase(double base)
AxisChangeEvent to all registered listeners.
base - the base value (must be > 1.0).getBase()public double getSmallestValue()
setSmallestValue(double)public void setSmallestValue(double value)
AxisChangeEvent to all registered listeners.
value - the value.getSmallestValue()public NumberTickUnit getTickUnit()
setTickUnit(NumberTickUnit)public void setTickUnit(NumberTickUnit unit)
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 ValueAxis.setAutoTickUnitSelection(boolean)
method).
unit - the new tick unit (null not permitted).getTickUnit()
public void setTickUnit(NumberTickUnit unit,
boolean notify,
boolean turnOffAutoSelect)
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
ValueAxis.setAutoTickUnitSelection(boolean) method).
unit - the new tick unit (null not permitted).notify - notify listeners?turnOffAutoSelect - turn off the auto-tick selection?getTickUnit()public java.text.NumberFormat getNumberFormatOverride()
null).setNumberFormatOverride(NumberFormat)public void setNumberFormatOverride(java.text.NumberFormat formatter)
formatter - the number formatter (null permitted).getNumberFormatOverride()public int getMinorTickCount()
setMinorTickCount(int)public void setMinorTickCount(int count)
AxisChangeEvent to all registered listeners.
count - the count.getMinorTickCount()public double calculateLog(double value)
value - the value.
calculateValue(double),
getBase()public double calculateValue(double log)
log - the log value (must be > 0.0).
calculateLog(double),
getBase()
public double java2DToValue(double java2DValue,
java.awt.geom.Rectangle2D area,
org.jfree.ui.RectangleEdge edge)
edge of the area.
java2DToValue in class ValueAxisjava2DValue - the Java2D coordinate.area - the area.edge - the edge that the axis belongs to.
ValueAxis.valueToJava2D(double, Rectangle2D, RectangleEdge)
public double valueToJava2D(double value,
java.awt.geom.Rectangle2D area,
org.jfree.ui.RectangleEdge edge)
area, based on the axis running along the
specified edge.
valueToJava2D in class ValueAxisvalue - the data value.area - the area.edge - the edge.
value.ValueAxis.java2DToValue(double, Rectangle2D, RectangleEdge)public void configure()
configure in class Axisprotected void autoAdjustRange()
autoAdjustRange in class ValueAxis
public AxisState draw(java.awt.Graphics2D g2,
double cursor,
java.awt.geom.Rectangle2D plotArea,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge,
PlotRenderingInfo plotState)
draw in class Axisg2 - 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).
null).
public java.util.List refreshTicks(java.awt.Graphics2D g2,
AxisState state,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
refreshTicks in class Axisg2 - the graphics device.state - the axis state.dataArea - the area in which the plot should be drawn.edge - the location of the axis.
protected java.util.List refreshTicksHorizontal(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
g2 - the graphics device.dataArea - the data area.edge - the edge.
protected java.util.List refreshTicksVertical(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
g2 - the graphics device.dataArea - the data area.edge - the edge.
protected void selectAutoTickUnit(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
g2 - the graphics device.dataArea - the area defined by the axes.edge - the axis location.
protected void selectHorizontalAutoTickUnit(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
g2 - the graphics device.dataArea - the area defined by the axes.edge - the axis location.
public double exponentLengthToJava2D(double length,
java.awt.geom.Rectangle2D area,
org.jfree.ui.RectangleEdge edge)
length - the length.area - the plot area.edge - the edge along which the axis lies.
protected void selectVerticalAutoTickUnit(java.awt.Graphics2D g2,
java.awt.geom.Rectangle2D dataArea,
org.jfree.ui.RectangleEdge edge)
g2 - the graphics device.dataArea - the area in which the plot should be drawn.edge - the axis location.protected double estimateMaximumTickLabelHeight(java.awt.Graphics2D g2)
g2 - the graphics device.
protected double estimateMaximumTickLabelWidth(java.awt.Graphics2D g2,
TickUnit unit)
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.
g2 - the graphics device.unit - the tick unit to use for calculation.
public void zoomRange(double lowerPercent,
double upperPercent)
zoomRange in class ValueAxislowerPercent - the new lower bound.upperPercent - the new upper bound.public boolean equals(java.lang.Object obj)
equals in class ValueAxisobj - the object (null permitted).
public int hashCode()
hashCode in class java.lang.Objectpublic static TickUnitSource createLogTickUnits(java.util.Locale locale)
locale - the locale to use to represent Numbers.
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