info.monitorenter.gui.chart.axis
Class AxisLogE<T extends AxisScalePolicyTransformation>

java.lang.Object
  info.monitorenter.gui.chart.axis.AAxis<T>
      info.monitorenter.gui.chart.axis.AAxisTransformation<T>
          info.monitorenter.gui.chart.axis.AxisLogE<T>

Type Parameters:

T - Used to enforce that this instance only accepts AxisScalePolicyTransformation and subtypes.

All Implemented Interfaces:

IAxis<T>, java.beans.PropertyChangeListener, java.io.Serializable, java.util.EventListener

public class AxisLogE<T extends AxisScalePolicyTransformation>
extends AAxisTransformation<T>

An AAxis with log scaled display of values.

Caution

This will not work with negative values (Double.NaN is computed for log of negative values).

This will even not work with values < 1.0 as the log transformation turns negative for values < 1.0 and becomes Double.NEGATIVE_INFINITY with lim -> 0.0 with more and more turns to a 100 % CPU load.

Version:

$Revision: 1.13 $

Author:

Pieter-Jan Busschaert (contributor), Achim Westermann

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class info.monitorenter.gui.chart.axis.AAxisTransformation

AAxisTransformation.XDataAccessor, AAxisTransformation.YDataAccessor

Nested classes/interfaces inherited from class info.monitorenter.gui.chart.axis.AAxis

AAxis.AChart2DDataAccessor

Nested classes/interfaces inherited from interface info.monitorenter.gui.chart.IAxis

IAxis.AxisTitle

Field Summary

Fields inherited from class info.monitorenter.gui.chart.axis.AAxisTransformation

m_outputErrorTstamp

Fields inherited from class info.monitorenter.gui.chart.axis.AAxis

DEBUG, m_accessor, m_formatter, m_majorTickSpacing, m_max, m_min, m_minorTickSpacing, m_needsFullRescale, m_rangePolicy

Fields inherited from interface info.monitorenter.gui.chart.IAxis

PROPERTY_ADD_REMOVE_TRACE, PROPERTY_AXIS_SCALE_POLICY_CHANGED, PROPERTY_LABELFORMATTER, PROPERTY_PAINTGRID, PROPERTY_PAINTSCALE, PROPERTY_RANGEPOLICY

Constructor Summary

AxisLogE()
Creates an instance that uses a LabelFormatterSimple for formatting numbers and a AxisScalePolicyAutomaticBestFit for controlling the scale.

AxisLogE(IAxisLabelFormatter formatter, T scalePolicy)
Creates an instance that will the given label formatter for formatting labels.

Method Summary

double	transform(double in) Performs Math.log10(double) with a check for reaching infinity.
double	untransform(double in) Template method for performing the reverse axis transformation.

Methods inherited from class info.monitorenter.gui.chart.axis.AAxisTransformation

createAccessor, getMaxTransformed, getMinTransformed, getScaledValue, scaleTrace, translateMousePosition, translatePxToValue

Methods inherited from class info.monitorenter.gui.chart.axis.AAxis

addPropertyChangeListener, addTrace, ensureInitialized, equals, findMax, findMin, getAccessor, getAxisPosition, getAxisScalePolicy, getAxisTitle, getDimension, getDimensionString, getFormatter, getHeight, getMajorTickSpacing, getMax, getMaxValue, getMin, getMinorTickSpacing, getMinValue, getPixelXLeft, getPixelXRight, getPixelYBottom, getPixelYTop, getPropertyChangeListeners, getRange, getRangePolicy, getTitle, getTitlePainter, getTraces, getValueDistanceForPixel, getWidth, hashCode, hasTrace, initPaintIteration, isDirtyScaling, isPaintGrid, isPaintScale, isStartMajorTick, isVisible, paint, paintTitle, propertyChange, removeAllTraces, removeAxisTitle, removePropertyChangeListener, removeTrace, scale, scalePoint, setAccessor, setAxisPosition, setAxisScalePolicy, setAxisTitle, setChart, setFormatter, setMajorTickSpacing, setMinorTickSpacing, setPaintGrid, setPaintScale, setPixelXLeft, setPixelXRight, setPixelYBottom, setPixelYTop, setRange, setRangePolicy, setStartMajorTick, setTitle, setTitlePainter, setVisible, translateValueToPx

Methods inherited from class java.lang.Object

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

Constructor Detail

AxisLogE

public AxisLogE()

Creates an instance that uses a LabelFormatterSimple for formatting numbers and a AxisScalePolicyAutomaticBestFit for controlling the scale.

AxisLogE

public AxisLogE(IAxisLabelFormatter formatter,
                T scalePolicy)

Creates an instance that will the given label formatter for formatting labels.

Parameters:

formatter - needed for formatting labels of this axis. Prefer using simple implementations like LabelFormatterSimple, a log axis is complicated enough to understand.

scalePolicy - controls the ticks/labels and their distance.

Method Detail

transform

public double transform(double in)

Performs Math.log10(double) with a check for reaching infinity.

The argument should not be negative, so only normalized values (no chart values but their scaled values or pixel values) should be given here.

If the argument is close to zero, the result of log would be Double.POSITIVE_INFINITY which is transformed to Double.MAX_VALUE.

Specified by:

transform in class AAxisTransformation<T extends AxisScalePolicyTransformation>

Parameters:

in - the value to compute the log base 10 of.

Returns:

log base 10 for the given value.

untransform

public double untransform(double in)

Description copied from class: AAxisTransformation

Template method for performing the reverse axis transformation.

This is the counterpart to AAxisTransformation.transform(double).

Specified by:

untransform in class AAxisTransformation<T extends AxisScalePolicyTransformation>

Parameters:

in - the transformed value.

Returns:

the normal value;

See Also:

AAxisTransformation.untransform(double)