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Eclipse Platform
Release 3.5

org.eclipse.jface.preference
Class FontFieldEditor

java.lang.Object
  extended by 

org.eclipse.jface.preference.FieldEditor
      extended by 
org.eclipse.jface.preference.FontFieldEditor
Direct Known Subclasses:
PropagatingFontFieldEditor

public class FontFieldEditor
extends FieldEditor

A field editor for a font type preference.


Field Summary
 
Fields inherited from class org.eclipse.jface.preference. FieldEditor
HORIZONTAL_GAP, IS_VALID, VALUE
 
Constructor Summary
protected FontFieldEditor ()
          Creates a new font field editor
  FontFieldEditor ( String name, String labelText, Composite parent)
          Creates a font field editor without a preview.
  FontFieldEditor ( String name, String labelText, String previewAreaText, Composite parent)
          Creates a font field editor with an optional preview area.
 
Method Summary
protected  void adjustForNumColumns (int numColumns)
          Adjusts the horizontal span of this field editor's basic controls.
protected  void applyFont ()
          Applies a font.
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.
 int getPreferredPreviewHeight ()
          Returns the preferred preview height.
  Control getPreviewControl ()
          Returns the preview control for this field editor.
protected   Label getValueControl ( Composite parent)
          Returns the value control for this field editor.
 void setChangeButtonText ( String text)
          Sets the text of the change button.
 void setEnabled (boolean enabled, Composite parent)
          Set whether or not the controls in the field editor are enabled.
protected  void setToDefault ()
          Store the default preference for the field being edited
 
Methods inherited from class org.eclipse.jface.preference. FieldEditor
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 Detail

FontFieldEditor

protected FontFieldEditor()
Creates a new font field editor


FontFieldEditor

public FontFieldEditor(
String name,
                       
String labelText,
                       
String previewAreaText,
                       
Composite parent)
Creates a font field editor with an optional preview area.

Parameters:
name - the name of the preference this field editor works on
labelText - the label text of the field editor
previewAreaText - the text used for the preview window. If it is null there will be no preview area,
parent - the parent of the field editor's control

FontFieldEditor

public FontFieldEditor(
String name,
                       
String labelText,
                       
Composite parent)
Creates a font field editor without a preview.

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

applyFont

protected void applyFont()
Description copied from class: FieldEditor
Applies a font.

The default implementation of this framework method does nothing. Subclasses should override this method if they want to change the font of the SWT control to a value different than the standard dialog font.

Overrides:
applyFont in class FieldEditor

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

getChangeControl

protected 
Button getChangeControl(
Composite parent)
Returns the change button for this field editor.

Parameters:
parent - The Composite to create the button in if required.
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

getPreferredPreviewHeight

public int getPreferredPreviewHeight()
Returns the preferred preview height.

Returns:
the height, or -1 if no previewer is installed

getPreviewControl

public 
Control getPreviewControl()
Returns the preview control for this field editor.

Returns:
the preview control

getValueControl

protected 
Label getValueControl(
Composite parent)
Returns the value control for this field editor. The value control displays the currently selected font name.

Parameters:
parent - The Composite to create the viewer in if required
Returns:
the value control

setChangeButtonText

public void setChangeButtonText(
String text)
Sets the text of the change button.

Parameters:
text - the new text

setToDefault

protected void setToDefault()
Store the default preference for the field being edited


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.

Eclipse Platform
Release 3.5

Guidelines for using Eclipse APIs.

Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.


 
 
  Published under the terms of the Eclipse Public License Version 1.0 ("EPL") Design by Interspire