de.jaret.util.ui.table.model
Class IndexColumn

java.lang.Object
  de.jaret.util.ui.table.model.AbstractColumn
      de.jaret.util.ui.table.model.IndexColumn

All Implemented Interfaces:

IColumn, java.util.Comparator<IRow>

public class IndexColumn
extends AbstractColumn
implements IColumn

A simple column displaying the row index.

Version:

$Id: IndexColumn.java 348 2007-04-07 15:11:12Z olk $

Author:

Peter Kliem

Field Summary

protected java.lang.String	_headerLabel haeder label for the column.
protected JaretTable	_table table the column is for.
static java.lang.String	ID id of the index col.

Fields inherited from class de.jaret.util.ui.table.model.AbstractColumn

_listeners

Constructor Summary

IndexColumn(JaretTable table, java.lang.String headerLabel)
Construct an index column.

Method Summary

int	compare(IRow r1, IRow r2)
java.lang.Class<?>	getContentClass() To allow null values as column value and to support cell editing and displaying a column may support this method for supplying the information.
java.lang.String	getHeaderLabel() Return a textual label to be displayed as the column header label.
java.lang.String	getId() Id is used for storing the column width.
java.lang.Object	getValue(IRow row) Retrieve the value of the column for the given row.
boolean	isEditable() Deafult: cols are aditable.
boolean	isEditable(IRow row) Default: delegate to isEditable.
void	setValue(IRow row, java.lang.Object value) Set the value of the coloumn for a given row.
boolean	supportsSorting() Check whether the column supports sorting.

Methods inherited from class de.jaret.util.ui.table.model.AbstractColumn

addColumnListener, displayHeader, fireValueChanged, getContentClass, remColumnListener

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.jaret.util.ui.table.model.IColumn

addColumnListener, displayHeader, getContentClass, remColumnListener

Methods inherited from interface java.util.Comparator

equals

Field Detail

ID

public static final java.lang.String ID

id of the index col.

See Also:

Constant Field Values

_table

protected JaretTable _table

table the column is for.

_headerLabel

protected java.lang.String _headerLabel

haeder label for the column.

Constructor Detail

IndexColumn

public IndexColumn(JaretTable table,
                   java.lang.String headerLabel)

Construct an index column.

Parameters:

table - table the indexcolumn is used for

headerLabel - hedare label to use

Method Detail

getId

public java.lang.String getId()

Id is used for storing the column width. It has to be unique among all columns if the use of the view state persisting support will be used.

Specified by:

getId in interface IColumn

Returns:

unique id.

getHeaderLabel

public java.lang.String getHeaderLabel()

Return a textual label to be displayed as the column header label.

Specified by:

getHeaderLabel in interface IColumn

Returns:

header label

getValue

public java.lang.Object getValue(IRow row)

Retrieve the value of the column for the given row.

Specified by:

getValue in interface IColumn

Parameters:

row - the row

Returns:

the column value for the given row.

setValue

public void setValue(IRow row,
                     java.lang.Object value)

Set the value of the coloumn for a given row.

Specified by:

setValue in interface IColumn

Parameters:

row - the row

value - value to set

compare

public int compare(IRow r1,
                   IRow r2)

Specified by:

compare in interface java.util.Comparator<IRow>

supportsSorting

public boolean supportsSorting()

Check whether the column supports sorting.

Specified by:

supportsSorting in interface IColumn

Returns:

true when sorting is supported.

getContentClass

public java.lang.Class<?> getContentClass()

To allow null values as column value and to support cell editing and displaying a column may support this method for supplying the information.

Specified by:

getContentClass in interface IColumn

Returns:

the contained class or null if the information is not available.

isEditable

public boolean isEditable()

Deafult: cols are aditable. Never editable.

Specified by:

isEditable in interface IColumn

Overrides:

isEditable in class AbstractColumn

Returns:

true

isEditable

public boolean isEditable(IRow row)

Default: delegate to isEditable. Check whether a a specific cell of the column can be edited. Never editable.

Specified by:

isEditable in interface IColumn

Overrides:

isEditable in class AbstractColumn

Parameters:

row - row specifying the cell in the column

Returns:

true if the ell can be changed