info.monitorenter.gui.chart.axis.scalepolicy

Class AxisScalePolicyAutomaticBestFit

java.lang.Object

info.monitorenter.gui.chart.axis.scalepolicy.AxisScalePolicyAutomaticBestFit

All Implemented Interfaces:

IAxisScalePolicy

public class AxisScalePolicyAutomaticBestFit
extends java.lang.Object
implements IAxisScalePolicy

Very basic and fast scale policy implementation that ensures the following:

• Every scale tick is a minor or major tick of the corresponding axis.
• If a scale tick was found that matches a major and a minor tick it is judged as major tick.
• Every major tick is a multiple of minor ticks: It is not possible for the sum minor ticks to "skip" a major tick.
• There is no guarantee that the labels of ticks will overwrite each others.
• There is no guarantee that the major and minor ticks of the axis are chosen in a reasonable manner: You could get no labels at all if the values are too high or thousands of labels with a weird output.

Constructor Summary

Constructors

Constructor and Description
AxisScalePolicyAutomaticBestFit()

Method Summary

Modifier and Type	Method and Description
java.util.List<LabeledValue>	getScaleValues(java.awt.Graphics g2d, IAxis<?> axis) Returns the array of labeled values that will be used by the Chart2D to paint labels.
void	initPaintIteration(IAxis<?> axis) Performs expensive calculations for various values that are used by many calls throughout a paint iterations.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

AxisScalePolicyAutomaticBestFit

public AxisScalePolicyAutomaticBestFit()

Method Detail

getScaleValues

public java.util.List<LabeledValue> getScaleValues(java.awt.Graphics g2d,
                                                   IAxis<?> axis)

Description copied from interface: IAxisScalePolicy

Returns the array of labeled values that will be used by the Chart2D to paint labels.

Specified by:

getScaleValues in interface IAxisScalePolicy

Parameters:

g2d - Provides information about the graphic context (e.g. font metrics).

axis - the axis to work for.

Returns:

the labeled values that will be used by the Chart2D to paint labels.

initPaintIteration

public void initPaintIteration(IAxis<?> axis)

Description copied from interface: IAxisScalePolicy

Performs expensive calculations for various values that are used by many calls throughout a paint iterations.

These values are constant throughout a paint iteration by the contract that no point is added removed or changed in this period. Because these values are used from many methods it is impossible to calculate them at a "transparent" method that may perform this caching over a paint period without knowledge from outside. The first method called in a paint iteration is called several further times in the iteration. So this is the common hook to invoke before painting a chart.

Specified by:

initPaintIteration in interface IAxisScalePolicy

Parameters:

axis - the axis to read data from.

See Also:

IAxisScalePolicy.initPaintIteration(info.monitorenter.gui.chart.IAxis)