com.privatejgoodies.forms.layout

Class FormSpec

java.lang.Object

com.privatejgoodies.forms.layout.FormSpec

All Implemented Interfaces:

Serializable

Direct Known Subclasses:

ColumnSpec, RowSpec

public abstract class FormSpec
extends Object
implements Serializable

An abstract class that specifies columns and rows in FormLayout by their default alignment, start size and resizing behavior. API users will use the subclasses ColumnSpec and RowSpec .

Also implements the parser for encoded column and row specifications and provides parser convenience behavior for its subclasses ColumnSpec and RowSpec.

TODO: Consider extracting the parser role to a separate class.

Version:

$Revision: 1.25 $

Author:

Karsten Lentzsch

See Also:

ColumnSpec, RowSpec, FormLayout, CellConstraints, Serialized Form

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	FormSpec.DefaultAlignment An ordinal-based serializable typesafe enumeration for the column and row default alignment types.

Field Summary

Fields

Modifier and Type	Field and Description
static double	DEFAULT_GROW The default resize weight.
static double	NO_GROW Gives a column or row a fixed size.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	FormSpec(FormSpec.DefaultAlignment defaultAlignment, Size size, double resizeWeight) Constructs a FormSpec for the given default alignment, size, and resize weight.
protected	FormSpec(FormSpec.DefaultAlignment defaultAlignment, String encodedDescription) Constructs a FormSpec from the specified encoded description.

Method Summary

Modifier and Type	Method and Description
String	encode() Returns a short and parseable string representation of this form specification.
FormSpec.DefaultAlignment	getDefaultAlignment() Returns the default alignment.
double	getResizeWeight() Returns the current resize weight.
Size	getSize() Returns the size.
String	toShortString() Returns a string representation of this form specification.
String	toString() Returns a string representation of this form specification.

Methods inherited from class java.lang.Object

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

Field Detail

NO_GROW

public static final double NO_GROW

Gives a column or row a fixed size.

See Also:

Constant Field Values

DEFAULT_GROW

public static final double DEFAULT_GROW

The default resize weight.

See Also:

Constant Field Values

Constructor Detail

FormSpec

protected FormSpec(FormSpec.DefaultAlignment defaultAlignment,
                   Size size,
                   double resizeWeight)

Constructs a FormSpec for the given default alignment, size, and resize weight. The resize weight must be a non-negative double; you can use NONE as a convenience value for no resize.

Parameters:

defaultAlignment - the spec's default alignment

size - a constant, component or bounded size

resizeWeight - the spec resize weight

Throws:

NullPointerException - if the size is null

IllegalArgumentException - if the resizeWeight is negative

FormSpec

protected FormSpec(FormSpec.DefaultAlignment defaultAlignment,
                   String encodedDescription)

Constructs a FormSpec from the specified encoded description. The description will be parsed to set initial values.

Parameters:

defaultAlignment - the default alignment

encodedDescription - the encoded description

Method Detail

getDefaultAlignment

public final FormSpec.DefaultAlignment getDefaultAlignment()

Returns the default alignment.

Returns:

the default alignment

getSize

public final Size getSize()

Returns the size.

Returns:

the size

getResizeWeight

public final double getResizeWeight()

Returns the current resize weight.

Returns:

the resize weight.

toString

public final String toString()

Returns a string representation of this form specification. The string representation consists of three elements separated by a colon (":"), first the alignment, second the size, and third the resize spec.

This method does not return an encoded version of this object; the contrary is the case. Many instances will return a string that cannot be parsed.

Note: The string representation may change at any time. For parsing use encode() instead.

Overrides:

toString in class Object

Returns:

a string representation of the form specification.

toShortString

public final String toShortString()

Returns a string representation of this form specification. The string representation consists of three elements separated by a colon (":"), first the alignment, second the size, and third the resize spec.

This method does not return an encoded version of this object; the contrary is the case. Many instances will return a string that cannot be parsed.

Note: The string representation may change at any time. For parsing use encode() instead.

Returns:

a string representation of the form specification.

encode

public final String encode()

Returns a short and parseable string representation of this form specification. The string will omit the alignment and resize specifications if these are the default values.

Returns:

a string representation of the form specification.

Since:

1.2

See Also:

for a more verbose string representation