org.eclipse.jface.preference
Class StringButtonFieldEditor

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

Direct Known Subclasses:

DirectoryFieldEditor, FileFieldEditor

public abstract class StringButtonFieldEditor

extends StringFieldEditor

An abstract field editor for a string type preference that presents a string input field with a change button to its right to edit the input field's content. When the user presses the change button, the abstract framework method changePressed() gets called to compute a new string.

Field Summary

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

UNLIMITED, VALIDATE_ON_FOCUS_LOST, VALIDATE_ON_KEY_STROKE

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

HORIZONTAL_GAP, IS_VALID, VALUE

Constructor Summary

protected	StringButtonFieldEditor() Creates a new string button field editor
protected	StringButtonFieldEditor(String name, String labelText, Composite parent) Creates a string button field editor.

Method Summary

protected void	adjustForNumColumns(int numColumns) Adjusts the horizontal span of this field editor's basic controls
protected abstract String	changePressed() Notifies that this field editor's change button has been pressed.
protected void	doFillIntoGrid(Composite parent, int numColumns) Fills this field editor's basic controls into the given parent.
protected Button	getChangeControl(Composite parent)
int	getNumberOfControls() Returns the number of basic controls this field editor consists of.
protected Shell	getShell() Returns this field editor's shell.
void	setChangeButtonText(String text) Sets the text of the change button.

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

checkState, doCheckState, doLoad, doLoadDefault, doStore, getErrorMessage, getStringValue, getTextControl, getTextControl, isEmptyStringAllowed, isValid, refreshValidState, setEmptyStringAllowed, setErrorMessage, setFocus, setStringValue, setTextLimit, setValidateStrategy, showErrorMessage, valueChanged

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, load, loadDefault, presentsDefaultValue, 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

StringButtonFieldEditor

protected StringButtonFieldEditor()

Creates a new string button field editor

StringButtonFieldEditor

protected StringButtonFieldEditor(String name,
                                  String labelText,
                                  Composite parent)

Creates a string button 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.

Overrides:

adjustForNumColumns in class StringFieldEditor

Parameters:

numColumns - the number of columns

changePressed

protected abstract String changePressed()

Notifies that this field editor's change button has been pressed.

Subclasses must implement this method to provide a corresponding new string for the text field. If the returned value is null, the currently displayed value remains.

Returns:

the new string to display, or null to leave the old string showing

doFillIntoGrid

protected void doFillIntoGrid(Composite parent,
                              int numColumns)

Description copied from class: StringFieldEditor

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

The string field implementation of this FieldEditor framework method contributes the text field. Subclasses may override but must call super.doFillIntoGrid.

Overrides:

doFillIntoGrid in class StringFieldEditor

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

getChangeControl

protected Button getChangeControl(Composite parent)

getNumberOfControls

public int getNumberOfControls()

Description copied from class: FieldEditor

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

Overrides:

getNumberOfControls in class StringFieldEditor

Returns:

the number of controls

getShell

protected Shell getShell()

Returns this field editor's shell.

Returns:

the shell

setChangeButtonText

public void setChangeButtonText(String text)

Sets the text of the change button.

Parameters:

text - the new text