net.sourceforge.java.util.gui.jface.preference
Class TableFieldEditor

java.lang.Object
  org.eclipse.jface.preference.FieldEditor
      net.sourceforge.java.util.gui.jface.preference.TableFieldEditor

public class TableFieldEditor

extends FieldEditor

A FieldEditor implementation that supports the selection of tabular data.

Author:

Sebastian Machhausen

Field Summary

private String[]	columnHeaders The column headers to display in the Table
private IStructuredContentProvider	contentProvider The content provider used to query the table data
private Object	input The input or model object that holds the data of the TableViewer
private ITableLabelProvider	labelProvider The label provider used to convert domain objects to ui specific textual representations.
private Object	oldValue The last selected value of the Table
private int	selectionColumn The index of the column to store/retrieve the value for.
private TableViewerSorter	sorter The Table sorter
private TableViewerSorterHandler	sorterHandler The handler used to sort the underlying IStructuredContentProvider
private Table	table The Table used to present the selectable tabular data
private TableViewer	viewer The TableViewer used as controller

Fields inherited from class org.eclipse.jface.preference.FieldEditor

HORIZONTAL_GAP, IS_VALID, VALUE

Constructor Summary

TableFieldEditor(String name, String labelText, Composite parent, IStructuredContentProvider contentProvider, ITableLabelProvider labelProvider, String[] columnHeaders, Object input)
Creates a new TableFieldEditor instance.

Method Summary

protected void	adjustForNumColumns(int numColumns) Adjusts the horizontal span of this TableFieldEditor's basic controls.
protected void	doFillIntoGrid(Composite parent, int numColumns) Fills this TableFieldEditor's basic controls into the given parent.
protected void	doLoad() Initializes this TableFieldEditor with the preference value from the preference store.
protected void	doLoadDefault() Initializes this TableFieldEditor with the default preference value from the preference store.
protected void	doStore() Stores the preference value from this TableFieldEditor into the preference store.
int	getColumnWidth(int columnIndex) Gets the width in pixel of the column at the specified columnIndex.
int	getNumberOfControls() Returns the number of controls in this TableFieldEditor.
String	getSelection() Gets the currently selected value of this TableFieldEditor.
int	getSelectionColumn() Gets the selection column which represents the index of the column whose value is stored/retrieved in this TableFieldEditor.
int	getSortingColumn() Gets the index of the column by which sorting is done.
private void	initializeColumns() Initializes the table columnHeaders by setting their widths and adjusting their settings.
private void	initializeViewer() Initializes this TableFieldEditor's TableViewer.
boolean	isSortAscending() Returns true if sorting is done in ascending order; false if done in descending order or sorting is disabled;
boolean	isSortingEnabled() Returns true if Table sorting is enabled; false otherwise.
void	setColumnWidth(int columnIndex, int width) Sets the width of the column at the specified columnIndex to the given width.
private void	setSelection(String selectionStr) Sets the selection of this TableFieldEditor to the row or element matching the specified selectionStr.
void	setSelectionColumn(int columnIndex) Sets the selection column to the specified columnIndex.
void	setSortingEnabled(boolean enabled) Enables or disables the sorting of the Table depending on the specified enabled status.
void	sort(int columnIndex, boolean ascending) Sorts the Table by the specified columnIndex in the specified sort order.
protected void	valueChanged() Informs this field editor's listener, if it has one, about a change to the value (VALUE property) provided that the old and new values are different.

Methods inherited from class org.eclipse.jface.preference.FieldEditor

applyFont, checkParent, clearErrorMessage, clearMessage, convertHorizontalDLUsToPixels, convertVerticalDLUsToPixels, createControl, dispose, fillIntoGrid, fireStateChanged, fireValueChanged, getFieldEditorFontName, getLabelControl, getLabelControl, getLabelText, getPage, getPreferenceName, getPreferencePage, getPreferenceStore, init, isValid, load, loadDefault, presentsDefaultValue, refreshValidState, setButtonLayoutData, setEnabled, setFocus, setLabelText, setPage, setPreferenceName, setPreferencePage, setPreferenceStore, setPresentsDefaultValue, setPropertyChangeListener, showErrorMessage, showMessage, store

Methods inherited from class java.lang.Object

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

Field Detail

table

private Table table

The Table used to present the selectable tabular data

viewer

private TableViewer viewer

The TableViewer used as controller

contentProvider

private IStructuredContentProvider contentProvider

The content provider used to query the table data

labelProvider

private ITableLabelProvider labelProvider

The label provider used to convert domain objects to ui specific textual representations.

input

private Object input

The input or model object that holds the data of the TableViewer

columnHeaders

private String[] columnHeaders

The column headers to display in the Table

sorter

private TableViewerSorter sorter

The Table sorter

sorterHandler

private TableViewerSorterHandler sorterHandler

The handler used to sort the underlying IStructuredContentProvider

selectionColumn

private int selectionColumn

The index of the column to store/retrieve the value for. If set to -1 the complete row represented as domain object is stored/retrieved. This is done by calling toString() on the respective domain object.

oldValue

private Object oldValue

The last selected value of the Table

Constructor Detail

TableFieldEditor

public TableFieldEditor(String name,
                        String labelText,
                        Composite parent,
                        IStructuredContentProvider contentProvider,
                        ITableLabelProvider labelProvider,
                        String[] columnHeaders,
                        Object input)

Creates a new TableFieldEditor instance.

Parameters:

name - the name of the preference this field editor works on

labelText - the label text of the field editor

parent - the parent of the field editor's control

contentProvider - the IStructuredContentProvider used to query the table data

labelProvider - the ITableLabelProvider used to convert domain objects to ui specific textual representations

columnHeaders - an array of String objects representing the column headers

input - the input or model object which holds the data for this TableFieldEditor

Method Detail

getNumberOfControls

public int getNumberOfControls()

Returns the number of controls in this TableFieldEditor. Returns 1 as the Table is the only control.

Returns:

1

See Also:

FieldEditor.getNumberOfControls()

setSelectionColumn

public void setSelectionColumn(int columnIndex)

Sets the selection column to the specified columnIndex. The index represents the column whose value is stored/retrieved in this TableFieldEditor. If set to -1 the complete row represented as domain object is stored/retrieved. This is done by calling Object.toString() on the respective domain object.

Parameters:

columnIndex - the column whose value is stored/retrieved in this TableFieldEditor

See Also:

getSelectionColumn()

getSelectionColumn

public int getSelectionColumn()

Gets the selection column which represents the index of the column whose value is stored/retrieved in this TableFieldEditor. A value of -1 means that the complete row represented as domain object is stored/retrieved. This is done by calling Object.toString() on the respective domain object.

Returns:

the column whose value is stored/retrieved in this TableFieldEditor

See Also:

setSelectionColumn(int)

getSelection

public String getSelection()

Gets the currently selected value of this TableFieldEditor. The value returned by this method depends on the selection column set up as returned by getSelectionColumn(). If the selection column is set to -1 the complete row represented as domain object is returned by calling Object.toString() on it. Otherwise the respective column value is queried and returned using the ITableLabelProvider bound to this TableFieldEditor.

Returns:

the currently selected value or an empty String if no selection

See Also:

setSelectionColumn(int), getSelectionColumn()

setSortingEnabled

public void setSortingEnabled(boolean enabled)

Enables or disables the sorting of the Table depending on the specified enabled status.
The IStructuredContentProvider used in this TableFieldEditor has to implement the ITableContentProvider interface to enable sorting.

Parameters:

enabled - true to enable sorting; false to disable

See Also:

isSortingEnabled()

isSortingEnabled

public boolean isSortingEnabled()

Returns true if Table sorting is enabled; false otherwise.

Returns:

true if sorting is enabled; false otherwise

See Also:

setSortingEnabled(boolean)

sort

public void sort(int columnIndex,
                 boolean ascending)

Sorts the Table by the specified columnIndex in the specified sort order. If sorting is disabled this method does nothing.

Parameters:

columnIndex - the index of the column to sort by

ascending - true to sort in ascending, false to sort in descending order

See Also:

setSortingEnabled(boolean), isSortingEnabled(), getSortingColumn(), isSortAscending()

getSortingColumn

public int getSortingColumn()

Gets the index of the column by which sorting is done. If sorting is disabled -1 is returned.

Returns:

the index of the column upon which sorting is done; -1 if sorting is disabled

See Also:

isSortAscending(), sort(int, boolean)

isSortAscending

public boolean isSortAscending()

Returns true if sorting is done in ascending order; false if done in descending order or sorting is disabled;

Returns:

true if sorting is done in ascending order; false if done in descending order or sorting is disabled;

See Also:

getSortingColumn(), sort(int, boolean)

setColumnWidth

public void setColumnWidth(int columnIndex,
                           int width)

Sets the width of the column at the specified columnIndex to the given width. If no TableColumn exists at the specified columnIndex the method does nothing.

Parameters:

columnIndex - the index of the column to set the width for

width - the width of the column in pixel

See Also:

getColumnWidth(int)

getColumnWidth

public int getColumnWidth(int columnIndex)

Gets the width in pixel of the column at the specified columnIndex. If no TableColumn exists at the specified columnIndex the method returns 0.

Parameters:

columnIndex - the index of the column to get the width for

Returns:

the column width

See Also:

setColumnWidth(int, int)

adjustForNumColumns

protected void adjustForNumColumns(int numColumns)

Adjusts the horizontal span of this TableFieldEditor's basic controls. The number of columnHeaders will always be equal to or greater than the value returned by this editor's getNumberOfControls method.

Parameters:

numColumns - the number of columnHeaders

See Also:

FieldEditor.adjustForNumColumns(int)

doFillIntoGrid

protected void doFillIntoGrid(Composite parent,
                              int numColumns)

Fills this TableFieldEditor's basic controls into the given parent.

Parameters:

parent - the composite used as a parent for the basic controls; the parent's layout must be a GridLayout

numColumns - the number of columnHeaders

See Also:

FieldEditor.doFillIntoGrid(org.eclipse.swt.widgets.Composite, int)

doLoad

protected void doLoad()

Initializes this TableFieldEditor with the preference value from the preference store.

See Also:

FieldEditor.doLoad()

doLoadDefault

protected void doLoadDefault()

Initializes this TableFieldEditor with the default preference value from the preference store.

See Also:

FieldEditor.doLoadDefault()

doStore

protected void doStore()

Stores the preference value from this TableFieldEditor into the preference store.

See Also:

FieldEditor.doStore()

valueChanged

protected void valueChanged()

Informs this field editor's listener, if it has one, about a change to the value (VALUE property) provided that the old and new values are different. This hook is not called when the value is initialized (or reset to the default value) from the preference store.

initializeViewer

private void initializeViewer()

Initializes this TableFieldEditor's TableViewer.

initializeColumns

private void initializeColumns()

Initializes the table columnHeaders by setting their widths and adjusting their settings.

setSelection

private void setSelection(String selectionStr)

Sets the selection of this TableFieldEditor to the row or element matching the specified selectionStr.

Parameters:

selectionStr - the String that identifies the row or element to select