info.monitorenter.gui.chart.axis.scalepolicy
Class AxisScalePolicyTransformation

java.lang.Object
  info.monitorenter.gui.chart.axis.scalepolicy.AxisScalePolicyTransformation

All Implemented Interfaces:

IAxisScalePolicy

public class AxisScalePolicyTransformation
extends java.lang.Object
implements IAxisScalePolicy

Very basic implementation that has to be used with implementation of AAxisTransformation to have the scale transformed.

Author:

Bill Schoolfield (contributor), Achim Westermann (modification)

Constructor Summary

AxisScalePolicyTransformation()

Method Summary

java.util.List<LabeledValue>	getScaleValues(java.awt.Graphics g2d, IAxis<?> axis) Uses the transformation function callbacks (AAxisTransformation.transform(double), AAxisTransformation.untransform(double)) of the AAxisTransformation this instance may be used with to have the scale transformed accordingly.
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

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

Constructor Detail

AxisScalePolicyTransformation

public AxisScalePolicyTransformation()

Method Detail

getScaleValues

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

Uses the transformation function callbacks (AAxisTransformation.transform(double), AAxisTransformation.untransform(double)) of the AAxisTransformation this instance may be used with to have the scale transformed accordingly.

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.