Eclipse Platform
Release 3.0

org.eclipse.ui.forms.editor
Class FormEditor

java.lang.Object
  extended byorg.eclipse.ui.part.WorkbenchPart
      extended byorg.eclipse.ui.part.EditorPart
          extended byorg.eclipse.ui.part.MultiPageEditorPart
              extended byorg.eclipse.ui.forms.editor.FormEditor
All Implemented Interfaces:
IAdaptable, IEditorPart, IExecutableExtension, ISaveablePart, IWorkbenchPart, IWorkbenchPart2

public abstract class FormEditor
extends MultiPageEditorPart

This class forms a base of multi-page form editors that typically use one or more pages with forms and one page for raw source of the editor input.

Pages are added 'lazily' i.e. adding a page reserves a tab for it but does not cause the page control to be created. Page control is created when an attempt is made to select the page in question. This allows editors with several tabs and complex pages to open quickly.

Subclasses should extend this class and implement addPages method. One of the two addPage methods should be called to contribute pages to the editor. One adds complete (standalone) editors as nested tabs. These editors will be created right away and will be hooked so that key bindings, selection service etc. is compatible with the one for the standalone case. The other method adds classes that implement IFormPage interface. These pages will be created lazily and they will share the common key binding and selection service.

Since:
3.0

Field Summary
protected  Vector pages
           
 
Fields inherited from interface org.eclipse.ui.IEditorPart
PROP_DIRTY, PROP_INPUT
 
Fields inherited from interface org.eclipse.ui.IWorkbenchPart
PROP_TITLE
 
Constructor Summary
FormEditor()
          The constructor.
 
Method Summary
 int addPage(Control control)
          Adds a simple SWT control as a page.
 int addPage(IEditorPart editor, IEditorInput input)
          Adds the complete editor part to the multi-page editor.
 int addPage(IFormPage page)
          Adds the form page to this editor.
protected abstract  void addPages()
          Subclass should implement this method to add pages to the editor using 'addPage(IFormPage)' method.
 void close(boolean save)
          Closes the editor programmatically.
protected  void configurePage(int index, IFormPage page)
          Configures the form page.
protected  void createPages()
          Creates the common toolkit for this editor and adds pages to the editor.
protected  FormToolkit createToolkit(Display display)
          Creates the form toolkit.
 void dispose()
          Disposes the pages and the toolkit after disposing the editor itself.
 void editorDirtyStateChanged()
          Called to indicate that the editor has been made dirty or the changes have been saved.
 IFormPage findPage(String pageId)
          Finds the page instance that has the provided id.
 IEditorPart getActiveEditor()
          Widens the visibility of the method in the superclass.
 IFormPage getActivePageInstance()
          Returns active page instance if the currently selected page index is not -1, or null if it is.
protected  int getCurrentPage()
          Returns the current page index.
 FormToolkit getToolkit()
          Returns the toolkit owned by this editor.
 void init(IEditorSite site, IEditorInput input)
          Overrides super to plug in a different selection provider.
protected  void pageChange(int newPageIndex)
          Notifies this multi-page editor that the page with the given id has been activated.
 void removePage(int pageIndex)
          Overrides the superclass to remove the page from the page table.
 IFormPage selectReveal(Object pageInput)
          Iterates through the pages calling similar method until a page is found that contains the desired page input.
protected  void setActivePage(int pageIndex)
          Sets the currently active page.
 IFormPage setActivePage(String pageId)
          Sets the active page using the unique page identifier.
 IFormPage setActivePage(String pageId, Object pageInput)
          Sets the active page using the unique page identifier and sets its input to the provided object.
protected  void updateActionBarContributor(int pageIndex)
          Notifies action bar contributor about page change.
 
Methods inherited from class org.eclipse.ui.part.MultiPageEditorPart
createPartControl, createSite, getActivePage, getContainer, getControl, getEditor, getPageCount, getPageImage, getPageText, handlePropertyChange, isDirty, setControl, setFocus, setPageImage, setPageText
 
Methods inherited from class org.eclipse.ui.part.EditorPart
doSave, doSaveAs, getEditorInput, getEditorSite, getTitleToolTip, isSaveAsAllowed, isSaveOnCloseNeeded, setContentDescription, setInitializationData, setInput, setPartName
 
Methods inherited from class org.eclipse.ui.part.WorkbenchPart
addPropertyListener, firePropertyChange, getAdapter, getConfigurationElement, getContentDescription, getDefaultImage, getPartName, getSite, getTitle, getTitleImage, removePropertyListener, setSite, setTitle, setTitleImage, setTitleToolTip, showBusy
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 
Methods inherited from interface org.eclipse.ui.IWorkbenchPart
addPropertyListener, getSite, getTitle, getTitleImage, removePropertyListener
 
Methods inherited from interface org.eclipse.core.runtime.IAdaptable
getAdapter
 

Field Detail

pages

protected Vector pages
Constructor Detail

FormEditor

public FormEditor()
The constructor.

Method Detail

init

public void init(IEditorSite site,
                 IEditorInput input)
          throws PartInitException
Overrides super to plug in a different selection provider.

Specified by:
init in interface IEditorPart
Overrides:
init in class MultiPageEditorPart
Parameters:
site - The site for which this part is being created; must not be null.
input - The input on which this editor should be created; must not be null.
Throws:
PartInitException - If the initialization of the part fails -- currently never.

createPages

protected void createPages()
Creates the common toolkit for this editor and adds pages to the editor.

Specified by:
createPages in class MultiPageEditorPart
See Also:
addPages()

createToolkit

protected FormToolkit createToolkit(Display display)
Creates the form toolkit. The method can be implemented to substitute a subclass of the toolkit that should be used for this editor. A typical use of this method would be to create the form toolkit using one shared FormColors object to share resources across the multiple editor instances.

Parameters:
display - the display to use when creating the toolkit
Returns:
the newly created toolkit instance

addPages

protected abstract void addPages()
Subclass should implement this method to add pages to the editor using 'addPage(IFormPage)' method.


addPage

public int addPage(IFormPage page)
            throws PartInitException
Adds the form page to this editor. Form page will be loaded lazily. Its part control will not be created until it is activated for the first time.

Parameters:
page - the form page to add
Throws:
PartInitException

addPage

public int addPage(Control control)
Adds a simple SWT control as a page. Overrides superclass implementation to keep track of pages.

Overrides:
addPage in class MultiPageEditorPart
Parameters:
control - the page control to add
Returns:
the 0-based index of the newly added page
See Also:
MultiPageEditorPart.setControl(int, Control)

addPage

public int addPage(IEditorPart editor,
                   IEditorInput input)
            throws PartInitException
Adds the complete editor part to the multi-page editor.

Overrides:
addPage in class MultiPageEditorPart
Parameters:
editor - the nested editor
input - the input for the nested editor
Returns:
the index of the new page
Throws:
PartInitException - if a new page could not be created
See Also:
the handler for property change events from the nested editor

configurePage

protected void configurePage(int index,
                             IFormPage page)
                      throws PartInitException
Configures the form page.

Parameters:
index - the page index
page - the page to configure
Throws:
PartInitException - if there are problems in configuring the page

removePage

public void removePage(int pageIndex)
Overrides the superclass to remove the page from the page table.

Overrides:
removePage in class MultiPageEditorPart
Parameters:
pageIndex - the 0-based index of the page in the editor
See Also:
MultiPageEditorPart.addPage(Control), MultiPageEditorPart.addPage(IEditorPart, IEditorInput)

editorDirtyStateChanged

public void editorDirtyStateChanged()
Called to indicate that the editor has been made dirty or the changes have been saved.


dispose

public void dispose()
Disposes the pages and the toolkit after disposing the editor itself. Subclasses must call 'super' when reimplementing the method.

Specified by:
dispose in interface IWorkbenchPart
Overrides:
dispose in class MultiPageEditorPart

getToolkit

public FormToolkit getToolkit()
Returns the toolkit owned by this editor.

Returns:
the toolkit object

getActiveEditor

public IEditorPart getActiveEditor()
Widens the visibility of the method in the superclass.

Overrides:
getActiveEditor in class MultiPageEditorPart
Returns:
the active nested editor

getCurrentPage

protected int getCurrentPage()
Returns the current page index. The value is identical to the value of 'getActivePage()' except during the page switch, when this method still has the old active page index.

Another important difference is during the editor closing. When the tab folder is disposed, 'getActivePage()' will return -1, while this method will still return the last active page.

Returns:
the currently selected page or -1 if no page is currently selected
See Also:
MultiPageEditorPart.getActivePage()

pageChange

protected void pageChange(int newPageIndex)
Description copied from class: MultiPageEditorPart
Notifies this multi-page editor that the page with the given id has been activated. This method is called when the user selects a different tab.

The MultiPageEditorPart implementation of this method sets focus to the new page, and notifies the action bar contributor (if there is one). This checks whether the action bar contributor is an instance of MultiPageEditorActionBarContributor, and, if so, calls setActivePage with the active nested editor. This also fires a selection change event if required.

Subclasses may extend this method.

Overrides:
pageChange in class MultiPageEditorPart
Parameters:
newPageIndex - the index of the activated page
See Also:
MultiPageEditorPart.pageChange(int)

setActivePage

public IFormPage setActivePage(String pageId)
Sets the active page using the unique page identifier.

Parameters:
pageId - the id of the page to switch to
Returns:
page that was set active or null if not found.

findPage

public IFormPage findPage(String pageId)
Finds the page instance that has the provided id.

Parameters:
pageId - the id of the page to find
Returns:
page with the matching id or null if not found.

setActivePage

public IFormPage setActivePage(String pageId,
                               Object pageInput)
Sets the active page using the unique page identifier and sets its input to the provided object.

Parameters:
pageId - the id of the page to switch to
pageInput - the page input
Returns:
page that was set active or null if not found.

selectReveal

public IFormPage selectReveal(Object pageInput)
Iterates through the pages calling similar method until a page is found that contains the desired page input.

Parameters:
pageInput - the object to select and reveal
Returns:
the page that accepted the request or null if no page has the desired object.
See Also:
setActivePage(java.lang.String)

getActivePageInstance

public IFormPage getActivePageInstance()
Returns active page instance if the currently selected page index is not -1, or null if it is.

Returns:
active page instance if selected, or null if no page is currently active.

setActivePage

protected void setActivePage(int pageIndex)
Description copied from class: MultiPageEditorPart
Sets the currently active page.

Overrides:
setActivePage in class MultiPageEditorPart
Parameters:
pageIndex - the index of the page to be activated; the index must be valid
See Also:
MultiPageEditorPart.setActivePage(int)

updateActionBarContributor

protected void updateActionBarContributor(int pageIndex)
Notifies action bar contributor about page change.

Parameters:
pageIndex - the index of the new page

close

public void close(boolean save)
Closes the editor programmatically.

Parameters:
save - if true, the content should be saved before closing.

Eclipse Platform
Release 3.0

Guidelines for using Eclipse APIs.

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