com.jgoodies.forms.layout
Class ColumnSpec

java.lang.Object
  com.jgoodies.forms.layout.FormSpec
      com.jgoodies.forms.layout.ColumnSpec

All Implemented Interfaces:

Serializable

public final class ColumnSpec
extends FormSpec

Specifies columns in FormLayout by their default orientation, start size and resizing behavior.

Examples:
The following examples specify a column with FILL alignment, a size of 10 dlu that won't grow.

 new ColumnSpec(Sizes.dluX(10));
 new ColumnSpec(ColumnSpec.FILL, Sizes.dluX(10), 0.0);
 new ColumnSpec(ColumnSpec.FILL, Sizes.dluX(10), ColumnSpec.NO_GROW);
 ColumnSpec.parse("10dlu");
 ColumnSpec.parse("10dlu:0");
 ColumnSpec.parse("fill:10dlu:0");
 

The FormSpecs provides predefined frequently used ColumnSpec instances.

Version:

$Revision: 1.20 $

Author:

Karsten Lentzsch

See Also:

FormSpecs, Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.jgoodies.forms.layout.FormSpec

FormSpec.DefaultAlignment

Field Summary

static FormSpec.DefaultAlignment	CENTER By default put the components in the center.
static FormSpec.DefaultAlignment	DEFAULT Unless overridden the default alignment for a column is FILL.
static FormSpec.DefaultAlignment	FILL By default fill the component into the column.
static FormSpec.DefaultAlignment	LEFT By default put components in the left.
static FormSpec.DefaultAlignment	RIGHT By default put components in the right.

Fields inherited from class com.jgoodies.forms.layout.FormSpec

DEFAULT_GROW, NO_GROW

Constructor Summary

ColumnSpec(FormSpec.DefaultAlignment defaultAlignment, Size size, double resizeWeight)
Constructs a ColumnSpec for the given default alignment, size and resize weight.

ColumnSpec(Size size)
Constructs a ColumnSpec for the given size using the default alignment, and no resizing.

Method Summary

static ColumnSpec	createGap(ConstantSize gapWidth) Creates and returns a ColumnSpec that represents a gap with the specified ConstantSize.
static ColumnSpec	decode(String encodedColumnSpec) Parses the encoded column specification and returns a ColumnSpec object that represents the string.
static ColumnSpec	decode(String encodedColumnSpec, LayoutMap layoutMap) Parses the encoded column specifications and returns a ColumnSpec object that represents the string.
static ColumnSpec[]	decodeSpecs(String encodedColumnSpecs) Parses and splits encoded column specifications using the default LayoutMap and returns an array of ColumnSpec objects.
static ColumnSpec[]	decodeSpecs(String encodedColumnSpecs, LayoutMap layoutMap) Splits and parses the encoded column specifications using the given LayoutMap and returns an array of ColumnSpec objects.
protected boolean	isHorizontal() Returns if this is a horizontal specification (vs. vertical).

Methods inherited from class com.jgoodies.forms.layout.FormSpec

encode, getDefaultAlignment, getResizeWeight, getSize, toShortString, toString

Methods inherited from class java.lang.Object

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

Field Detail

LEFT

public static final FormSpec.DefaultAlignment LEFT

By default put components in the left.

CENTER

public static final FormSpec.DefaultAlignment CENTER

By default put the components in the center.

RIGHT

public static final FormSpec.DefaultAlignment RIGHT

By default put components in the right.

FILL

public static final FormSpec.DefaultAlignment FILL

By default fill the component into the column.

DEFAULT

public static final FormSpec.DefaultAlignment DEFAULT

Unless overridden the default alignment for a column is FILL.

Constructor Detail

ColumnSpec

public ColumnSpec(FormSpec.DefaultAlignment defaultAlignment,
                  Size size,
                  double resizeWeight)

Constructs a ColumnSpec for the given default alignment, size and resize weight.

The resize weight must be a non-negative double; you can use NO_GROW as a convenience value for no resize.

Parameters:

defaultAlignment - the column's default alignment

size - constant, component size or bounded size

resizeWeight - the column's non-negative resize weight

Throws:

NullPointerException - if the size is null

IllegalArgumentException - if the size is invalid or the resizeWeight is negative

ColumnSpec

public ColumnSpec(Size size)

Constructs a ColumnSpec for the given size using the default alignment, and no resizing.

Parameters:

size - constant size, component size, or bounded size

Throws:

IllegalArgumentException - if the size is invalid

Method Detail

createGap

public static ColumnSpec createGap(ConstantSize gapWidth)

Creates and returns a ColumnSpec that represents a gap with the specified ConstantSize.

Parameters:

gapWidth - specifies the gap width

Returns:

a ColumnSpec that describes a horizontal gap

Throws:

NullPointerException - if gapWidth is null

Since:

1.2

decode

public static ColumnSpec decode(String encodedColumnSpec)

Parses the encoded column specification and returns a ColumnSpec object that represents the string. Variables are expanded using the default LayoutMap.

Parameters:

encodedColumnSpec - the encoded column specification

Returns:

a ColumnSpec instance for the given specification

Throws:

NullPointerException - if encodedColumnSpec is null

Since:

1.2

See Also:

decode(String, LayoutMap), LayoutMap.getRoot()

decode

public static ColumnSpec decode(String encodedColumnSpec,
                                LayoutMap layoutMap)

Parses the encoded column specifications and returns a ColumnSpec object that represents the string. Variables are expanded using the given LayoutMap.

Parameters:

encodedColumnSpec - the encoded column specification

layoutMap - expands layout column variables

Returns:

a ColumnSpec instance for the given specification

Throws:

NullPointerException - if encodedColumnSpec or layoutMap is null

IllegalArgumentException - if encodedColumnSpec is empty or whitespace

Since:

1.2

See Also:

decodeSpecs(String, LayoutMap)

decodeSpecs

public static ColumnSpec[] decodeSpecs(String encodedColumnSpecs)

Parses and splits encoded column specifications using the default LayoutMap and returns an array of ColumnSpec objects.

Parameters:

encodedColumnSpecs - comma separated encoded column specifications

Returns:

an array of decoded column specifications

Throws:

NullPointerException - if encodedColumnSpecs is null

See Also:

decodeSpecs(String, LayoutMap), decode(String), LayoutMap.getRoot()

decodeSpecs

public static ColumnSpec[] decodeSpecs(String encodedColumnSpecs,
                                       LayoutMap layoutMap)

Splits and parses the encoded column specifications using the given LayoutMap and returns an array of ColumnSpec objects.

Parameters:

encodedColumnSpecs - comma separated encoded column specifications

layoutMap - expands layout column variables

Returns:

an array of decoded column specifications

Throws:

NullPointerException - if encodedColumnSpecs or layoutMap is null

Since:

1.2

See Also:

decodeSpecs(String), decode(String, LayoutMap)

isHorizontal

protected boolean isHorizontal()

Returns if this is a horizontal specification (vs. vertical). Used to distinct between horizontal and vertical dialog units, which have different conversion factors.

Returns:

always true (for horizontal)