Eclipse Plug-in Developer Guide (Galileo) - PreferenceDialog (Eclipse Platform API Specification)

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Eclipse Platform
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org.eclipse.jface.preference
Class PreferenceDialog


java.lang.Object
  

org.eclipse.jface.window.Window
      

org.eclipse.jface.dialogs.Dialog
          

org.eclipse.jface.dialogs.TrayDialog
              
org.eclipse.jface.preference.PreferenceDialog

All Implemented Interfaces:: IPageChangeProvider, IPreferencePageContainer, IShellProvider

public class PreferenceDialog
extends TrayDialog
implements IPreferencePageContainer, IPageChangeProvider
extends TrayDialog
implements IPreferencePageContainer, IPageChangeProvider

A preference dialog is a hierarchical presentation of preference pages. Each page is represented by a node in the tree shown on the left hand side of the dialog; when a node is selected, the corresponding page is shown on the right hand side.

Nested Class Summary

Nested classes/interfaces inherited from class org.eclipse.jface.window. Window

Window.IExceptionHandler

Field Summary

protected static int FAILED
          Return code used when dialog failed

static String PREF_DLG_IMG_TITLE_ERROR
          Indentifier for the error image

static String PREF_DLG_TITLE_IMG
          Title area fields

Fields inherited from class org.eclipse.jface.dialogs. Dialog

blockedHandler, buttonBar, DIALOG_DEFAULT_BOUNDS, DIALOG_PERSISTLOCATION, DIALOG_PERSISTSIZE, dialogArea, DLG_IMG_ERROR, DLG_IMG_HELP, DLG_IMG_INFO, DLG_IMG_MESSAGE_ERROR, DLG_IMG_MESSAGE_INFO, DLG_IMG_MESSAGE_WARNING, DLG_IMG_QUESTION, DLG_IMG_WARNING, ELLIPSIS

Fields inherited from class org.eclipse.jface.window. Window

CANCEL, OK

Constructor Summary

PreferenceDialog ( Shell parentShell, PreferenceManager manager)
          Creates a new preference dialog under the control of the given preference manager.

Method Summary

protected void addListeners ( TreeViewer viewer)
          Add the listeners to the tree viewer.

void addPageChangedListener ( IPageChangedListener listener)
          Adds a listener for page changes in this page change provider.

protected void buttonPressed (int buttonId)
          Notifies that this dialog's button with the given id has been pressed.

protected void cancelPressed ()
          Notifies that the cancel button of this dialog has been pressed.

boolean close ()
          Closes this window, disposes its shell, and removes this window from its window manager (if it has one).

protected void configureShell ( Shell newShell)
          Configures the given shell in preparation for opening this window in it.

protected void constrainShellSize ()
          Constrain the shell size to be no larger than the display bounds.

protected void createButtonsForButtonBar ( Composite parent)
          Adds buttons to this dialog's button bar.

protected Control createContents ( Composite parent)
          The Dialog implementation of this Window method creates and lays out the top level composite for the dialog, and determines the appropriate horizontal and vertical dialog units based on the font size.

protected Control createDialogArea ( Composite parent)
          Creates and returns the contents of the upper part of this dialog (above the button bar).

protected void createPage ( IPreferenceNode node)
          Create the page for the node.

protected Composite createPageContainer ( Composite parent)
          Creates the inner page container.

protected void createPageControl ( IPreferencePage page, Composite parent)
          Create the page control for the supplied page.

protected Sash createSash ( Composite composite, Control rightControl)
          Create the sash with right control on the right.

protected Composite createTitleArea ( Composite parent)
          Creates the wizard's title area.

protected Control createTreeAreaContents ( Composite parent)


protected TreeViewer createTreeViewer ( Composite parent)
          Create a new TreeViewer.

protected IPreferenceNode findNodeMatching ( String nodeId)
          Find the IPreferenceNode that has data the same id as the supplied value.

protected void firePageChanged ( PageChangedEvent event)
          Notifies any selection changed listeners that the selected page has changed.

protected IPreferencePage getCurrentPage ()
          Returns the currentPage.

protected int getLastRightWidth ()
          Get the last known right side width.

protected IPreferencePage getPage ( IPreferenceNode node)
          Get the page for the node.

protected Composite getPageContainer ()
          Get the composite that is showing the page.

protected Layout getPageLayout ()
          Return the layout for the composite that contains the pages.

PreferenceManager getPreferenceManager ()
          Returns the preference mananger used by this preference dialog.

IPreferenceStore getPreferenceStore ()
          Returns the preference store.

protected String getSelectedNodePreference ()
          Get the name of the selected item preference

Object getSelectedPage ()
          Returns the currently selected page in the dialog.

protected IPreferenceNode getSingleSelection ( ISelection selection)


TreeViewer getTreeViewer ()


protected void handleSave ()
          Save the values specified in the pages.

protected void handleShellCloseEvent ()
          Notifies that the window's close button was pressed, the close menu was selected, or the ESCAPE key pressed.

protected void helpPressed ()
          Notifies of the pressing of the Help button.

protected boolean isCurrentPageValid ()
          Returns whether the current page is valid.

protected boolean isResizable ()
          Returns a boolean indicating whether the dialog should be considered resizable when the shell style is initially set.

protected void layoutTreeAreaControl ( Control control)


protected void okPressed ()
          The preference dialog implementation of this Dialog framework method sends performOk to all pages of the preference dialog, then calls handleSave on this dialog to save any state, and then calls close to close this dialog.

void removePageChangedListener ( IPageChangedListener listener)
          Removes the given page change listener from this page change provider.

protected void selectSavedItem ()
          Selects the saved item in the tree of preference pages.

protected void setCurrentPage ( IPreferencePage currentPage)
          Sets the current page.

void setErrorMessage ( String newErrorMessage)
          Display the given error message.

void setMessage ( String newMessage)
          Set the message text.

void setMessage ( String newMessage, int newType)
          Sets the message for this dialog with an indication of what type of message it is.

void setMinimumPageSize (int minWidth, int minHeight)
          Sets the minimum page size.

void setMinimumPageSize ( Point size)
          Sets the minimum page size.

protected void setPageContainer ( Composite pageContainer)
          Set the composite that is showing the page.

void setPreferenceStore ( IPreferenceStore store)
          Sets the preference store for this preference dialog.

void setSelectedNode ( String pageId)
          Sets the name of the selected item preference.

protected void setSelectedNodePreference ( String pageId)
          Sets the name of the selected item preference.

protected void setTreeViewer ( TreeViewer treeViewer)
          Set the treeViewer.

protected boolean showPage ( IPreferenceNode node)
          Shows the preference page corresponding to the given preference node.

protected void update ()
          Updates this dialog's controls to reflect the current page.

void updateButtons ()
          Adjusts the enable state of the OK button to reflect the state of the currently active page in this container.

void updateMessage ()
          Updates the message (or error message) shown in the message line to reflect the state of the currently active page in this container.

void updateTitle ()
          Updates the title to reflect the state of the currently active page in this container.

protected void updateTreeFont ( Font dialogFont)
          Update the tree to use the specified Font.

Methods inherited from class org.eclipse.jface.dialogs. TrayDialog

closeTray, createButtonBar, createHelpControl, getLayout, getTray, isDialogHelpAvailable, isHelpAvailable, openTray, setDialogHelpAvailable, setHelpAvailable

Methods inherited from class org.eclipse.jface.dialogs. Dialog

applyDialogFont, convertHeightInCharsToPixels, convertHeightInCharsToPixels, convertHorizontalDLUsToPixels, convertHorizontalDLUsToPixels, convertVerticalDLUsToPixels, convertVerticalDLUsToPixels, convertWidthInCharsToPixels, convertWidthInCharsToPixels, create, createButton, dialogFontIsDefault, getBlockedHandler, getButton, getButtonBar, getCancelButton, getDialogArea, getDialogBoundsSettings, getDialogBoundsStrategy, getImage, getInitialLocation, getInitialSize, getOKButton, initializeBounds, initializeDialogUnits, setBlockedHandler, setButtonLayoutData, setButtonLayoutFormData, shortenText

Methods inherited from class org.eclipse.jface.window. Window

canHandleShellCloseEvent, createShell, getConstrainedShellBounds, getContents, getDefaultImage, getDefaultImages, getDefaultOrientation, getParentShell, getReturnCode, getShell, getShellListener, getShellStyle, getWindowManager, handleFontChange, open, setBlockOnOpen, setDefaultImage, setDefaultImages, setDefaultModalParent, setDefaultOrientation, setExceptionHandler, setParentShell, setReturnCode, setShellStyle, setWindowManager

Methods inherited from class java.lang. Object

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

Field Detail

PREF_DLG_IMG_TITLE_ERROR

public static final 
String PREF_DLG_IMG_TITLE_ERROR

Indentifier for the error image

See Also:: Constant Field Values

PREF_DLG_TITLE_IMG

public static final 
String PREF_DLG_TITLE_IMG

Title area fields

See Also:: Constant Field Values

FAILED

protected static final int FAILED

Return code used when dialog failed

See Also:: Constant Field Values

Constructor Detail

PreferenceDialog

public PreferenceDialog(
Shell parentShell,
                        
PreferenceManager manager)

Creates a new preference dialog under the control of the given preference manager.

Parameters:: parentShell - the parent shell; manager - the preference manager

Method Detail

buttonPressed

protected void buttonPressed(int buttonId)

Description copied from class: Dialog

Notifies that this dialog's button with the given id has been pressed.

The Dialog implementation of this framework method calls okPressed if the ok button is the pressed, and cancelPressed if the cancel button is the pressed. All other button presses are ignored. Subclasses may override to handle other buttons, but should call super.buttonPressed if the default handling of the ok and cancel buttons is desired.

Overrides:: buttonPressed in class Dialog

Parameters:: buttonId - the id of the button that was pressed (see IDialogConstants.*_ID constants)

cancelPressed

protected void cancelPressed()

Description copied from class: Dialog

Notifies that the cancel button of this dialog has been pressed.

The Dialog implementation of this framework method sets this dialog's return code to Window.CANCEL and closes the dialog. Subclasses may override if desired.

Overrides:: cancelPressed in class Dialog

close

public boolean close()

Description copied from class: Window

Closes this window, disposes its shell, and removes this window from its window manager (if it has one).

This framework method may be extended (super.close must be called).

Note that in order to prevent recursive calls to this method it does not call Shell#close(). As a result ShellListeners will not receive a shellClosed event.

Overrides:: close in class TrayDialog

Returns:: true if the window is (or was already) closed, and false if it is still open
See Also:: Window.close()

configureShell

protected void configureShell(
Shell newShell)

Description copied from class: Window

Configures the given shell in preparation for opening this window in it.

The default implementation of this framework method sets the shell's image and gives it a grid layout. Subclasses may extend or reimplement.

Overrides:: configureShell in class Window

Parameters:: newShell - the shell

constrainShellSize

protected void constrainShellSize()

Description copied from class: Window

Constrain the shell size to be no larger than the display bounds.

Overrides:: constrainShellSize in class Window

createButtonsForButtonBar

protected void createButtonsForButtonBar(
Composite parent)

Description copied from class: Dialog

Adds buttons to this dialog's button bar.

The Dialog implementation of this framework method adds standard ok and cancel buttons using the createButton framework method. These standard buttons will be accessible from getCancelButton, and getOKButton. Subclasses may override.

Overrides:: createButtonsForButtonBar in class Dialog

Parameters:: parent - the button bar composite

createContents

protected 
Control createContents(
Composite parent)

Description copied from class: Dialog

The Dialog implementation of this Window method creates and lays out the top level composite for the dialog, and determines the appropriate horizontal and vertical dialog units based on the font size. It then calls the createDialogArea and createButtonBar methods to create the dialog area and button bar, respectively. Overriding createDialogArea and createButtonBar are recommended rather than overriding this method.

Overrides:: createContents in class Dialog

Parameters:: parent - the parent composite for the controls in this window. The type of layout used is determined by getLayout()
Returns:: the control that will be returned by subsequent calls to getContents()

createDialogArea

protected 
Control createDialogArea(
Composite parent)

Description copied from class: Dialog

Creates and returns the contents of the upper part of this dialog (above the button bar).

The Dialog implementation of this framework method creates and returns a new Composite with standard margins and spacing.

The returned control's layout data must be an instance of GridData. This method must not modify the parent's layout.

Subclasses must override this method but may call super as in the following example:

 Composite composite = (Composite) super.createDialogArea(parent);
 //add controls to composite as necessary
 return composite;

Overrides:: createDialogArea in class Dialog

Parameters:: parent - the parent composite to contain the dialog area
Returns:: the dialog area control

createSash

protected 
Sash createSash(
Composite composite,
                          
Control rightControl)

Create the sash with right control on the right. Note that this method assumes GridData for the layout data of the rightControl.

Parameters:: composite -; rightControl -
Returns:: Sash
Since:: 3.1

createPageContainer

protected 
Composite createPageContainer(
Composite parent)

Creates the inner page container.

Parameters:: parent -
Returns:: Composite

getPageLayout

protected 
Layout getPageLayout()

Return the layout for the composite that contains the pages.

Returns:: PageLayout
Since:: 3.1

createTitleArea

protected 
Composite createTitleArea(
Composite parent)

Creates the wizard's title area.

Parameters:: parent - the SWT parent for the title area composite.
Returns:: the created title area composite.

createTreeAreaContents

protected 
Control createTreeAreaContents(
Composite parent)

Parameters:: parent - the SWT parent for the tree area controls.
Returns:: the new Control.
Since:: 3.0

createTreeViewer

protected 
TreeViewer createTreeViewer(
Composite parent)

Create a new TreeViewer.

Parameters:: parent - the parent Composite.
Returns:: the TreeViewer.
Since:: 3.0

addListeners

protected void addListeners(
TreeViewer viewer)

Add the listeners to the tree viewer.

Parameters:: viewer -
Since:: 3.1

findNodeMatching

protected 
IPreferenceNode findNodeMatching(
String nodeId)

Find the IPreferenceNode that has data the same id as the supplied value.

Parameters:: nodeId - the id to search for.
Returns:: IPreferenceNode or null if not found.

getLastRightWidth

protected int getLastRightWidth()

Get the last known right side width.

Returns:: the width.

getPreferenceManager

public 
PreferenceManager getPreferenceManager()

Returns the preference mananger used by this preference dialog.

Returns:: the preference mananger

getPreferenceStore

public 
IPreferenceStore getPreferenceStore()

Description copied from interface: IPreferencePageContainer

Returns the preference store.

Specified by:: getPreferenceStore in interface IPreferencePageContainer

Returns:: the preference store, or null if none

getSelectedNodePreference

protected 
String getSelectedNodePreference()

Get the name of the selected item preference

Returns:: String

getSingleSelection

protected 
IPreferenceNode getSingleSelection(
ISelection selection)

Parameters:: selection - the ISelection to examine.
Returns:: the first element, or null if empty.

getTreeViewer

public 
TreeViewer getTreeViewer()

Returns:: the TreeViewer for this dialog.
Since:: 3.3

handleSave

protected void handleSave()

Save the values specified in the pages.

The default implementation of this framework method saves all pages of type PreferencePage (if their store needs saving and is a PreferenceStore).

Subclasses may override.

handleShellCloseEvent

protected void handleShellCloseEvent()

Notifies that the window's close button was pressed, the close menu was selected, or the ESCAPE key pressed.

The default implementation of this framework method sets the window's return code to CANCEL and closes the window using close. Subclasses may extend or reimplement.

Overrides:: handleShellCloseEvent in class Window

helpPressed

protected void helpPressed()

Notifies of the pressing of the Help button.

The default implementation of this framework method calls performHelp on the currently active page.

isCurrentPageValid

protected boolean isCurrentPageValid()

Returns whether the current page is valid.

Returns:: false if the current page is not valid, or or true if the current page is valid or there is no current page

layoutTreeAreaControl

protected void layoutTreeAreaControl(
Control control)

Parameters:: control - the Control to lay out.
Since:: 3.0

okPressed

protected void okPressed()

The preference dialog implementation of this Dialog framework method sends performOk to all pages of the preference dialog, then calls handleSave on this dialog to save any state, and then calls close to close this dialog.

Overrides:: okPressed in class Dialog

selectSavedItem

protected void selectSavedItem()

Selects the saved item in the tree of preference pages. If it cannot do this it saves the first one.

setErrorMessage

public void setErrorMessage(
String newErrorMessage)

Display the given error message. The currently displayed message is saved and will be redisplayed when the error message is set to null.

Parameters:: newErrorMessage - the errorMessage to display or null

setMessage

public void setMessage(
String newMessage)

Set the message text. If the message line currently displays an error, the message is stored and will be shown after a call to clearErrorMessage

Shortcut for setMessage(newMessage, NONE)

Parameters:: newMessage - the message, or null to clear the message

setMessage

public void setMessage(
String newMessage,
                       int newType)

Sets the message for this dialog with an indication of what type of message it is.

The valid message types are one of NONE, INFORMATION,WARNING, or ERROR.

Note that for backward compatibility, a message of type ERROR is different than an error message (set using setErrorMessage). An error message overrides the current message until the error message is cleared. This method replaces the current message and does not affect the error message.

Parameters:: newMessage - the message, or null to clear the message; newType - the message type
Since:: 2.0

setMinimumPageSize

public void setMinimumPageSize(int minWidth,
                               int minHeight)

Sets the minimum page size.

Parameters:: minWidth - the minimum page width; minHeight - the minimum page height
See Also:: setMinimumPageSize(Point)

setMinimumPageSize

public void setMinimumPageSize(
Point size)

Sets the minimum page size.

Parameters:: size - the page size encoded as new Point(width,height)
See Also:: setMinimumPageSize(int,int)

setPreferenceStore

public void setPreferenceStore(
IPreferenceStore store)

Sets the preference store for this preference dialog.

Parameters:: store - the preference store
See Also:: getPreferenceStore()

setSelectedNode

public void setSelectedNode(
String pageId)

Sets the name of the selected item preference. Public equivalent to setSelectedNodePreference.

Parameters:: pageId - The identifier for the page
Since:: 3.0

setSelectedNodePreference

protected void setSelectedNodePreference(
String pageId)

Sets the name of the selected item preference.

Parameters:: pageId - The identifier for the page

showPage

protected boolean showPage(
IPreferenceNode node)

Shows the preference page corresponding to the given preference node. Does nothing if that page is already current.

Parameters:: node - the preference node, or null if none
Returns:: true if the page flip was successful, and false is unsuccessful

createPage

protected void createPage(
IPreferenceNode node)

Create the page for the node.

Parameters:: node -
Since:: 3.1

getPage

protected 
IPreferencePage getPage(
IPreferenceNode node)

Get the page for the node.

Parameters:: node -
Returns:: IPreferencePage
Since:: 3.1

update

protected void update()

Updates this dialog's controls to reflect the current page.

updateButtons

public void updateButtons()

Description copied from interface: IPreferencePageContainer

Adjusts the enable state of the OK button to reflect the state of the currently active page in this container.

This method is called by the container itself when its preference page changes and may be called by the page at other times to force a button state update.

Specified by:: updateButtons in interface IPreferencePageContainer

updateMessage

public void updateMessage()

Description copied from interface: IPreferencePageContainer

Updates the message (or error message) shown in the message line to reflect the state of the currently active page in this container.

This method is called by the container itself when its preference page changes and may be called by the page at other times to force a message update.

Specified by:: updateMessage in interface IPreferencePageContainer

updateTitle

public void updateTitle()

Description copied from interface: IPreferencePageContainer

Updates the title to reflect the state of the currently active page in this container.

This method is called by the container itself when its page changes and may be called by the page at other times to force a title update.

Specified by:: updateTitle in interface IPreferencePageContainer

updateTreeFont

protected void updateTreeFont(
Font dialogFont)

Update the tree to use the specified Font.

Parameters:: dialogFont - the Font to use.
Since:: 3.0

getCurrentPage

protected 
IPreferencePage getCurrentPage()

Returns the currentPage.

Returns:: IPreferencePage
Since:: 3.1

setCurrentPage

protected void setCurrentPage(
IPreferencePage currentPage)

Sets the current page.

Parameters:: currentPage -
Since:: 3.1

setTreeViewer

protected void setTreeViewer(
TreeViewer treeViewer)

Set the treeViewer.

Parameters:: treeViewer -
Since:: 3.1

getPageContainer

protected 
Composite getPageContainer()

Get the composite that is showing the page.

Returns:: Composite.
Since:: 3.1

setPageContainer

protected void setPageContainer(
Composite pageContainer)

Set the composite that is showing the page.

Parameters:: pageContainer - Composite
Since:: 3.1

createPageControl

protected void createPageControl(
IPreferencePage page,
                                 
Composite parent)

Create the page control for the supplied page.

Parameters:: page - - the preference page to be shown; parent - - the composite to parent the page
Since:: 3.1

getSelectedPage

public 
Object getSelectedPage()

Description copied from interface: IPageChangeProvider

Returns the currently selected page in the dialog.

Specified by:: getSelectedPage in interface IPageChangeProvider

Returns:: the selected page in the dialog or null if none is selected. The type may be domain specific. In the JFace provided dialogs this will be an instance of IDialogPage.
Since:: 3.1
See Also:: IPageChangeProvider.getSelectedPage()

addPageChangedListener

public void addPageChangedListener(
IPageChangedListener listener)

Description copied from interface: IPageChangeProvider

Adds a listener for page changes in this page change provider. Has no effect if an identical listener is already registered.

Specified by:: addPageChangedListener in interface IPageChangeProvider

Parameters:: listener - a page changed listener
Since:: 3.1
See Also:: IPageChangeProvider.addPageChangedListener(org.eclipse.jface.dialogs.IPageChangedListener)

removePageChangedListener

public void removePageChangedListener(
IPageChangedListener listener)

Description copied from interface: IPageChangeProvider

Removes the given page change listener from this page change provider. Has no effect if an identical listener is not registered.

Specified by:: removePageChangedListener in interface IPageChangeProvider

Parameters:: listener - a page changed listener
Since:: 3.1
See Also:: IPageChangeProvider.removePageChangedListener(org.eclipse.jface.dialogs.IPageChangedListener)

firePageChanged

protected void firePageChanged(
PageChangedEvent event)

Notifies any selection changed listeners that the selected page has changed. Only listeners registered at the time this method is called are notified.

Parameters:: event - a selection changed event
Since:: 3.1
See Also:: IPageChangedListener.pageChanged(org.eclipse.jface.dialogs.PageChangedEvent)

isResizable

protected boolean isResizable()

Description copied from class: Dialog

Returns a boolean indicating whether the dialog should be considered resizable when the shell style is initially set. This method is used to ensure that all style bits appropriate for resizable dialogs are added to the shell style. Individual dialogs may always set the shell style to ensure that a dialog is resizable, but using this method ensures that resizable dialogs will be created with the same set of style bits. Style bits will never be removed based on the return value of this method. For example, if a dialog returns false, but also sets a style bit for a SWT.RESIZE border, the style bit will be honored.

Overrides:: isResizable in class Dialog

Returns:: a boolean indicating whether the dialog is resizable and should have the default style bits for resizable dialogs

Overview

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Class

Use

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Index

Help

Eclipse Platform
Release 3.5

PREV CLASS NEXT CLASS

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SUMMARY: NESTED | FIELD | CONSTR | METHOD

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Guidelines for using Eclipse APIs.

org.eclipse.jface.preference Class PreferenceDialog

PREF_DLG_IMG_TITLE_ERROR

PREF_DLG_TITLE_IMG

FAILED

PreferenceDialog

buttonPressed

cancelPressed

close

configureShell

constrainShellSize

createButtonsForButtonBar

createContents

createDialogArea

createSash

createPageContainer

getPageLayout

createTitleArea

createTreeAreaContents

createTreeViewer

addListeners

findNodeMatching

getLastRightWidth

getPreferenceManager

getPreferenceStore

getSelectedNodePreference

getSingleSelection

getTreeViewer

handleSave

handleShellCloseEvent

helpPressed

isCurrentPageValid

layoutTreeAreaControl

okPressed

selectSavedItem

setErrorMessage

setMessage

setMessage

setMinimumPageSize

setMinimumPageSize

setPreferenceStore

setSelectedNode

setSelectedNodePreference

showPage

createPage

getPage

update

updateButtons

updateMessage

updateTitle

updateTreeFont

getCurrentPage

setCurrentPage

setTreeViewer

getPageContainer

setPageContainer

createPageControl

getSelectedPage

addPageChangedListener

removePageChangedListener

firePageChanged

isResizable

org.eclipse.jface.preference
Class PreferenceDialog