com.jgoodies.forms.layout
Class ConstantSize

java.lang.Object
  com.jgoodies.forms.layout.ConstantSize

All Implemented Interfaces:

Size, java.io.Serializable

public final class ConstantSize
extends java.lang.Object
implements Size, java.io.Serializable

An implementation of the Size interface that represents constant sizes described by a value and unit, for example: 10 pixel, 15 point or 4 dialog units. You can get instances of ConstantSize using the factory methods and constants in the Sizes class. Logical constant sizes that vary with the current layout style are delivered by the LayoutStyle class.

This class supports different size units:

Unit	Abbreviation	Size
Millimeter	mm	0.1 cm
Centimeter	cm	10.0 mm
Inch	in	25.4 mm
DTP Point	pt	1/72 in
Pixel	px	1/(resolution in dpi) in
Dialog Unit	dlu	honors l&f, resolution, and dialog font size

Examples:

 Sizes.ZERO;
 Sizes.DLUX9;
 Sizes.dluX(42);
 Sizes.pixel(99);
 

Version:

$Revision: 54721 $

Author:

Karsten Lentzsch

See Also:

Size, Sizes, Serialized Form

Nested Class Summary

static class

ConstantSize.Unit An ordinal-based serializable typesafe enumeration for units as used in instances of ConstantSize.

Field Summary

static ConstantSize.Unit	CENTIMETER
static ConstantSize.Unit	CM
static ConstantSize.Unit	DIALOG_UNITS_X
static ConstantSize.Unit	DIALOG_UNITS_Y
static ConstantSize.Unit	DLUX
static ConstantSize.Unit	DLUY
static ConstantSize.Unit	IN
static ConstantSize.Unit	INCH
static ConstantSize.Unit	MILLIMETER
static ConstantSize.Unit	MM
static ConstantSize.Unit	PIXEL
static ConstantSize.Unit	POINT
private ConstantSize.Unit	unit
private double	value
private static ConstantSize.Unit[]	VALUES An array of all enumeration values used to canonicalize deserialized units.

Constructor Summary

ConstantSize(double value, ConstantSize.Unit unit)
Constructs an instance of ConstantSize from the given encoded size and unit description.

ConstantSize(int value, ConstantSize.Unit unit)
Constructs an instance of ConstantSize from the given encoded size and unit description.

Method Summary

(package private) static ConstantSize	dluX(int value) Returns an instance of Size for the specified value in horizontal dialog units.
(package private) static ConstantSize	dluY(int value) Returns an instance of Size for the specified value in vertical dialog units.
boolean	equals(java.lang.Object o) Indicates whether some other ConstantSize is "equal to" this one.
int	getPixelSize(java.awt.Component component) Converts the size if necessary and returns the value in pixels.
int	hashCode() Returns a hash code value for the object.
private int	intValue()
int	maximumSize(java.awt.Container container, java.util.List components, FormLayout.Measure minMeasure, FormLayout.Measure prefMeasure, FormLayout.Measure defaultMeasure) Returns this size as pixel size.
(package private) static java.lang.String[]	splitValueAndUnit(java.lang.String encodedValueAndUnit) Splits a string that encodes size with unit into the size and unit substrings.
java.lang.String	toString() Returns a string representation of this size object.
(package private) static ConstantSize	valueOf(java.lang.String encodedValueAndUnit, boolean horizontal) Constructs an instance of ConstantSize from the given encoded size and unit description.

Methods inherited from class java.lang.Object

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

Field Detail

PIXEL

public static final ConstantSize.Unit PIXEL

POINT

public static final ConstantSize.Unit POINT

DIALOG_UNITS_X

public static final ConstantSize.Unit DIALOG_UNITS_X

DLUX

public static final ConstantSize.Unit DLUX

DIALOG_UNITS_Y

public static final ConstantSize.Unit DIALOG_UNITS_Y

DLUY

public static final ConstantSize.Unit DLUY

MILLIMETER

public static final ConstantSize.Unit MILLIMETER

MM

public static final ConstantSize.Unit MM

CENTIMETER

public static final ConstantSize.Unit CENTIMETER

CM

public static final ConstantSize.Unit CM

INCH

public static final ConstantSize.Unit INCH

IN

public static final ConstantSize.Unit IN

VALUES

private static final ConstantSize.Unit[] VALUES

An array of all enumeration values used to canonicalize deserialized units.

value

private final double value

unit

private final ConstantSize.Unit unit

Constructor Detail

ConstantSize

ConstantSize(int value,
             ConstantSize.Unit unit)

Constructs an instance of ConstantSize from the given encoded size and unit description.

Parameters:

value - the size value interpreted in the given units

unit - the size's unit

ConstantSize

ConstantSize(double value,
             ConstantSize.Unit unit)

Constructs an instance of ConstantSize from the given encoded size and unit description.

Parameters:

value - the size value interpreted in the given units

unit - the size's unit

Method Detail

valueOf

static ConstantSize valueOf(java.lang.String encodedValueAndUnit,
                            boolean horizontal)

Constructs an instance of ConstantSize from the given encoded size and unit description.

Parameters:

encodedValueAndUnit - the size's value and unit as string

horizontal - true for horizontal, false for vertical

Returns:

a constant size for the given encoding and unit description

Throws:

java.lang.IllegalArgumentException - if the unit requires integer but the value is not an integer

dluX

static ConstantSize dluX(int value)

Returns an instance of Size for the specified value in horizontal dialog units.

Parameters:

value - size value in horizontal dialog units

Returns:

the associated Size instance

dluY

static ConstantSize dluY(int value)

Returns an instance of Size for the specified value in vertical dialog units.

Parameters:

value - size value in vertical dialog units

Returns:

the associated Size instance

getPixelSize

public int getPixelSize(java.awt.Component component)

Converts the size if necessary and returns the value in pixels.

Parameters:

component - the associated component

Returns:

the size in pixels

maximumSize

public int maximumSize(java.awt.Container container,
                       java.util.List components,
                       FormLayout.Measure minMeasure,
                       FormLayout.Measure prefMeasure,
                       FormLayout.Measure defaultMeasure)

Returns this size as pixel size. Neither requires the component list nor the specified measures.

Invoked by FormSpec to determine the size of a column or row.

Specified by:

maximumSize in interface Size

Parameters:

container - the layout container

components - the list of components used to compute the size

minMeasure - the measure that determines the minimum sizes

prefMeasure - the measure that determines the preferred sizes

defaultMeasure - the measure that determines the default sizes

Returns:

the computed maximum size in pixel

equals

public boolean equals(java.lang.Object o)

Indicates whether some other ConstantSize is "equal to" this one.

Overrides:

equals in class java.lang.Object

Parameters:

o - the Object with which to compare

Returns:

true if this object is the same as the obj argument; false otherwise.

See Also:

Object.hashCode(), Hashtable

hashCode

public int hashCode()

Returns a hash code value for the object. This method is supported for the benefit of hashtables such as those provided by java.util.Hashtable.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this object.

See Also:

Object.equals(java.lang.Object), Hashtable

toString

public java.lang.String toString()

Returns a string representation of this size object. Note: The string representation may change at any time. It is strongly recommended to not use this string for parsing purposes.

Overrides:

toString in class java.lang.Object

Returns:

a string representation of the constant size

intValue

private int intValue()

splitValueAndUnit

static java.lang.String[] splitValueAndUnit(java.lang.String encodedValueAndUnit)

Splits a string that encodes size with unit into the size and unit substrings. Returns an array of two strings.

Parameters:

encodedValueAndUnit - a strings that represents a size with unit

Returns:

the first element is size, the second is unit