info.monitorenter.gui.chart.labelformatters
Class LabelFormatterAutoUnits

java.lang.Object
  info.monitorenter.gui.chart.labelformatters.ALabelFormatter
      info.monitorenter.gui.chart.labelformatters.LabelFormatterAutoUnits

All Implemented Interfaces:

IAxisLabelFormatter, java.io.Serializable

public class LabelFormatterAutoUnits
extends ALabelFormatter

A label formatter that adds an automatic choice of the unit SI prefix to a decorated IAxisLabelFormatter.

The formatted Strings will be divided by a factor according to the automatic chosen unit.

Version:

$Revision: 1.22 $

Author:

Achim Westermann

See Also:

Serialized Form

Field Summary

Fields inherited from class info.monitorenter.gui.chart.labelformatters.ALabelFormatter

m_propertyChangeSupport, UNIT_UNCHANGED

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

PROPERTY_FORMATCHANGE

Constructor Summary

LabelFormatterAutoUnits()
Default constructor that uses a LabelFormatterSimple to add the auto unit feature to.

LabelFormatterAutoUnits(ALabelFormatter delegate)
Creates an instance that will add "unit-functionality" to the given formatter.

Method Summary

void	addPropertyChangeListener(java.lang.String propertyName, java.beans.PropertyChangeListener listener) Registers a property change listener that will be informed about changes of the property identified by the given propertyName.
java.lang.String	format(double value) Provide a String for the value.
IAxis<?>	getAxis() Intended for AAxis only.
int	getMaxAmountChars() Returns the maximum amount of characters that will be returned from IAxisLabelFormatter.format(double).
double	getMinimumValueShiftForChange() Returns the minimum change in the value to format that will cause to return a different formatted String.
double	getNextEvenValue(double value, boolean ceiling) Returns the next "even" value to the given one.
AUnit	getUnit() Returns ALabelFormatter.UNIT_UNCHANGED.
void	initPaintIteration() Void adapter method implementation - optional to override.
java.lang.Number	parse(java.lang.String formatted) The reverse operation to IAxisLabelFormatter.format(double).
void	removePropertyChangeListener(java.lang.String property, java.beans.PropertyChangeListener listener) Deregisters a property change listener that has been registerd for listening on the given property.
void	setAxis(IAxis<?> axis) Intended for AAxis only.
java.lang.String	toString()

Methods inherited from class info.monitorenter.gui.chart.labelformatters.ALabelFormatter

equals, hashCode

Methods inherited from class java.lang.Object

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

Constructor Detail

LabelFormatterAutoUnits

public LabelFormatterAutoUnits()

Default constructor that uses a LabelFormatterSimple to add the auto unit feature to.

LabelFormatterAutoUnits

public LabelFormatterAutoUnits(ALabelFormatter delegate)

Creates an instance that will add "unit-functionality" to the given formatter.

Parameters:

delegate - the formatter that will be decorated with units.

Method Detail

addPropertyChangeListener

public void addPropertyChangeListener(java.lang.String propertyName,
                                      java.beans.PropertyChangeListener listener)

Description copied from interface: IAxisLabelFormatter

Registers a property change listener that will be informed about changes of the property identified by the given propertyName.

Specified by:

addPropertyChangeListener in interface IAxisLabelFormatter

Overrides:

addPropertyChangeListener in class ALabelFormatter

Parameters:

propertyName - the name of the property the listener is interested in

listener - a listener that will only be informed if the property identified by the argument propertyName changes

See Also:

IAxisLabelFormatter.addPropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)

format

public java.lang.String format(double value)

Description copied from interface: IAxisLabelFormatter

Provide a String for the value. Subclasses should override the label formatting here. The raw value is passed here to allow a general treatment. Transformations of this raw value should be done here (e.g. division by multiples of 1000 for scientific unit system display, date formatting,...).

Parameters:

value - the value to format.

Returns:

the formatted value.

See Also:

IAxisLabelFormatter.format(double)

getAxis

public IAxis<?> getAxis()

Description copied from class: ALabelFormatter

Intended for AAxis only.

Overrides:

getAxis in class ALabelFormatter

Returns:

Returns the axis.

See Also:

ALabelFormatter.getAxis()

getMaxAmountChars

public int getMaxAmountChars()

Description copied from class: ALabelFormatter

Returns the maximum amount of characters that will be returned from IAxisLabelFormatter.format(double).

Specified by:

getMaxAmountChars in interface IAxisLabelFormatter

Overrides:

getMaxAmountChars in class ALabelFormatter

Returns:

the maximum amount of characters that will be returned from IAxisLabelFormatter.format(double).

See Also:

ALabelFormatter.getMaxAmountChars()

getMinimumValueShiftForChange

public double getMinimumValueShiftForChange()

Description copied from interface: IAxisLabelFormatter

Returns the minimum change in the value to format that will cause to return a different formatted String.

To achieve two different formatted Strings to be returned from the format method the corresponding values given to the format method have to differ at least by this value.

Some implementations (e.g. a formatter for date) have to use their own format method an increas a value to determine when the first change will occur. This is expensive and it's recommended that this action is performed once only and the result is stored. Additionally this routine has to start with an "even" (see IAxisLabelFormatter.getNextEvenValue(double, boolean)) value to get a correct result (the distance from even number to even number).

Returns:

the minimum change in the value to format that will cause to return a different formatted String.

See Also:

IAxisLabelFormatter.getMinimumValueShiftForChange()

getNextEvenValue

public double getNextEvenValue(double value,
                               boolean ceiling)

Description copied from interface: IAxisLabelFormatter

Returns the next "even" value to the given one. "Even" means that the format method will exactly return the String for the value and not cut or round any information. A label String created with an "even" number will be exactly at the position it describes.

Parameters:

value - the value to get the next "even" value for.

ceiling - if true, the next higher number will returned, else the next lower one.

Returns:

the next "even" value to the given one.

See Also:

IAxisLabelFormatter.getNextEvenValue(double, boolean)

getUnit

public AUnit getUnit()

Description copied from class: ALabelFormatter

Returns ALabelFormatter.UNIT_UNCHANGED.

Specified by:

getUnit in interface IAxisLabelFormatter

Overrides:

getUnit in class ALabelFormatter

Returns:

ALabelFormatter.UNIT_UNCHANGED

See Also:

IAxisLabelFormatter.getUnit()

initPaintIteration

public void initPaintIteration()

Description copied from class: ALabelFormatter

Void adapter method implementation - optional to override.

Specified by:

initPaintIteration in interface IAxisLabelFormatter

Overrides:

initPaintIteration in class ALabelFormatter

See Also:

IAxisLabelFormatter.initPaintIteration()

parse

public java.lang.Number parse(java.lang.String formatted)
                       throws java.lang.NumberFormatException

Description copied from interface: IAxisLabelFormatter

The reverse operation to IAxisLabelFormatter.format(double).

The given argument has to be in the format that will be generated by that method or exceptions may be thrown.
test.parse(test.format(d))== d
has to be true if no rounding occurs by the formatter.

Parameters:

formatted - a String in the format that will be produced by method IAxisLabelFormatter.format(double).

Returns:

the parsed number.

Throws:

java.lang.NumberFormatException - if the format of the argument is invalid.

See Also:

IAxisLabelFormatter.parse(String)

removePropertyChangeListener

public void removePropertyChangeListener(java.lang.String property,
                                         java.beans.PropertyChangeListener listener)

Description copied from interface: IAxisLabelFormatter

Deregisters a property change listener that has been registerd for listening on the given property.

Specified by:

removePropertyChangeListener in interface IAxisLabelFormatter

Overrides:

removePropertyChangeListener in class ALabelFormatter

Parameters:

property - the property the listener was registered to.

listener - a listener that will only be informed if the property identified by the argument propertyName changes

See Also:

ALabelFormatter.removePropertyChangeListener(java.lang.String, java.beans.PropertyChangeListener)

setAxis

public void setAxis(IAxis<?> axis)

Description copied from class: ALabelFormatter

Intended for AAxis only.

Do never invoke this! This is only public for package sorting reasons.

Specified by:

setAxis in interface IAxisLabelFormatter

Overrides:

setAxis in class ALabelFormatter

Parameters:

axis - The m_axis to set.

See Also:

ALabelFormatter.setAxis(IAxis)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

See Also:

Object.toString()