Package org.jCharts.axisChart.axis.scale
Class ScaleCalculator
java.lang.Object
org.jCharts.axisChart.axis.scale.ScaleCalculator
- Direct Known Subclasses:
AutomaticScaleCalculator
,UserDefinedScaleCalculator
Base class for the logic used to compute the scale on the charts. There are two
implementations provided and you are free to implement your own if you do not like
the default implementations provided.
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected double
private double
private double
private int
private int
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected abstract void
Computes the scale increment.final void
Drives the computation of the axis increment and related values taking into account the user specified rounding criteria.final double
final double
final double
int
final int
protected double
round
(double value, double powerOfTen) Rounds the passed value by the power of ten specifiedprotected void
roundTheIncrement
(double powerOfTen) Rounds the scale increment up by the power of ten specified in the properties.final void
setMaxValue
(double maxValue) final void
setMinValue
(double minValue) void
setNumberOfScaleItems
(int numberOfScaleItems) final void
setRoundingPowerOfTen
(int powerOfTen) Sets the exponent power of ten to round values to.toString()
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Field Details
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minValue
private double minValue -
maxValue
private double maxValue -
roundingPowerOfTen
private int roundingPowerOfTen -
numberOfScaleItems
private int numberOfScaleItems -
increment
protected double increment
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Constructor Details
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ScaleCalculator
public ScaleCalculator()
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Method Details
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computeIncrement
protected abstract void computeIncrement()Computes the scale increment. -
computeScaleValues
public final void computeScaleValues()Drives the computation of the axis increment and related values taking into account the user specified rounding criteria. So if you specify to round to the nearest 100 and give an increment of 2.5, the increment will become 100. -
setMinValue
public final void setMinValue(double minValue) -
getMinValue
public final double getMinValue() -
setMaxValue
public final void setMaxValue(double maxValue) -
getMaxValue
public final double getMaxValue() -
getIncrement
public final double getIncrement() -
getNumberOfScaleItems
public int getNumberOfScaleItems() -
setNumberOfScaleItems
public void setNumberOfScaleItems(int numberOfScaleItems) -
setRoundingPowerOfTen
public final void setRoundingPowerOfTen(int powerOfTen) Sets the exponent power of ten to round values to.- Parameters:
powerOfTen
- exponent of ten to round to: 1=10, 2=100, -2=.01
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getRoundingPowerOfTen
public final int getRoundingPowerOfTen() -
round
protected double round(double value, double powerOfTen) Rounds the passed value by the power of ten specified- Parameters:
value
- the value to roundpowerOfTen
- the product of 10 times the rounding property.- Returns:
- double the rounded result
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roundTheIncrement
protected void roundTheIncrement(double powerOfTen) Rounds the scale increment up by the power of ten specified in the properties.- Parameters:
powerOfTen
- the value of 10 times the rounding property.
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toString
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