org.eclipse.jface.preference
Class ColorFieldEditor

java.lang.Object
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  +--org.eclipse.jface.preference.FieldEditor
        |
        +--org.eclipse.jface.preference.ColorFieldEditor

public class ColorFieldEditor

extends FieldEditor

A field editor for a color type preference.

Field Summary

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

HORIZONTAL_GAP, IS_VALID, VALUE

Constructor Summary

protected	ColorFieldEditor() Creates a new color field editor
	ColorFieldEditor(String name, String labelText, Composite parent) Creates a color field editor.

Method Summary

protected void	adjustForNumColumns(int numColumns) Adjusts the horizontal span of this field editor's basic controls
protected Point	computeImageSize(Control window) Computes the size of the color image displayed on the button.
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.
protected Button	getChangeControl(Composite parent) Returns the change button for this field editor.
int	getNumberOfControls() Returns the number of basic controls this field editor consists of.
protected void	updateColorImage(Display display, RGB rgb) Updates the color image displayed on the button to match the given color.

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

applyFont, checkParent, clearErrorMessage, clearMessage, convertHorizontalDLUsToPixels, convertVerticalDLUsToPixels, createControl, dispose, fillIntoGrid, fireStateChanged, fireValueChanged, getFieldEditorFontName, getLabelControl, getLabelControl, getLabelText, getPreferenceName, getPreferencePage, getPreferenceStore, init, isValid, load, loadDefault, presentsDefaultValue, refreshValidState, setFocus, setLabelText, 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 Detail

ColorFieldEditor

protected ColorFieldEditor()

Creates a new color field editor

ColorFieldEditor

public ColorFieldEditor(String name,
                        String labelText,
                        Composite parent)

Creates a color field editor.

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

Method Detail

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

computeImageSize

protected Point computeImageSize(Control window)

Computes the size of the color image displayed on the button.

This is an internal method and should not be called by clients.

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.

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

getChangeControl

protected Button getChangeControl(Composite parent)

Returns the change button for this field editor.

Returns:

the change button

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

updateColorImage

protected void updateColorImage(Display display,
                                RGB rgb)

Updates the color image displayed on the button to match the given color.

This is an internal method and should not be called by clients.