Package org.eclipse.jface.preference

Class ComboFieldEditor

java.lang.Object

org.eclipse.jface.preference.FieldEditor

org.eclipse.jface.preference.ComboFieldEditor

public class ComboFieldEditor
extends FieldEditor

A field editor for a combo box that allows the drop-down selection of one of a list of items.

Since:

3.3

Field Summary

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

HORIZONTAL_GAP, IS_VALID, VALUE

Constructor Summary

Constructors

Constructor	Description
ComboFieldEditor(String name, String labelText, String[][] entryNamesAndValues, Composite parent)	Create the combo box field editor.

Method Summary

Modifier and Type	Method	Description
protected void	adjustForNumColumns(int numColumns)	Adjusts the horizontal span of this field editor's basic controls.
protected void	doFillIntoGrid(Composite parent, int numColumns)	Fills this field editor's basic controls into the given parent.
protected void	doLoad()	Initializes this field editor with the preference value from the preference store.
protected void	doLoadDefault()	Initializes this field editor with the default preference value from the preference store.
protected void	doStore()	Stores the preference value from this field editor into the preference store.
int	getNumberOfControls()	Returns the number of basic controls this field editor consists of.
void	setEnabled(boolean enabled, Composite parent)	Set whether or not the controls in the field editor are enabled.
protected void	valueChanged(String oldValue, String newValue)	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, 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

Constructor Details

ComboFieldEditor

public ComboFieldEditor(String name,
 String labelText,
 String[][] entryNamesAndValues,
 Composite parent)

Create the combo box field editor.

Parameters:

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

labelText - the label text of the field editor

entryNamesAndValues - the names (labels) and underlying values to populate the combo widget. These should be arranged as: { {name1, value1}, {name2, value2}, ...}

parent - the parent composite

Method Details

adjustForNumColumns

protected void adjustForNumColumns(int numColumns)

Description copied from class: FieldEditor

Adjusts the horizontal span of this field editor's basic controls.

Subclasses must implement this method to adjust the horizontal span of controls so they appear correct in the given number of columns.

The number of columns will always be equal to or greater than the value returned by this editor's getNumberOfControls method.

Specified by:

adjustForNumColumns in class FieldEditor

Parameters:

numColumns - the number of columns

doFillIntoGrid

protected void doFillIntoGrid(Composite parent,
 int numColumns)

Description copied from class: FieldEditor

Fills this field editor's basic controls into the given parent.

Subclasses must implement this method to create the controls for this field editor.

Note this method may be called by the constructor, so it must not access fields on the receiver object because they will not be fully initialized.

Specified by:

doFillIntoGrid in class FieldEditor

Parameters:

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

numColumns - the number of columns

doLoad

protected void doLoad()

Description copied from class: FieldEditor

Initializes this field editor with the preference value from the preference store.

Subclasses must implement this method to properly initialize the field editor.

Specified by:

doLoad in class FieldEditor

doLoadDefault

protected void doLoadDefault()

Description copied from class: FieldEditor

Initializes this field editor with the default preference value from the preference store.

Subclasses must implement this method to properly initialize the field editor.

Specified by:

doLoadDefault in class FieldEditor

doStore

protected void doStore()

Description copied from class: FieldEditor

Stores the preference value from this field editor into the preference store.

Subclasses must implement this method to save the entered value into the preference store.

Specified by:

doStore in class FieldEditor

getNumberOfControls

public int getNumberOfControls()

Description copied from class: FieldEditor

Returns the number of basic controls this field editor consists of.

Specified by:

getNumberOfControls in class FieldEditor

Returns:

the number of controls

valueChanged

protected void valueChanged(String oldValue,
 String newValue)

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.

Parameters:

oldValue - the old value

newValue - the new value

Since:

3.18

setEnabled

public void setEnabled(boolean enabled,
 Composite parent)

Description copied from class: FieldEditor

Set whether or not the controls in the field editor are enabled.

Overrides:

setEnabled in class FieldEditor

Parameters:

enabled - The enabled state.

parent - The parent of the controls in the group. Used to create the controls if required.