Interface IWorkbenchPart
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- All Superinterfaces:
IAdaptable
- All Known Subinterfaces:
IConsoleView
,IDebugView
,IEditorPart
,IFormPage
,IInPlaceEditor
,IResourceNavigator
,IReusableEditor
,ISaveableWorkbenchPart
,ISearchResultView
,ISearchResultViewPart
,ISynchronizeView
,ITextEditor
,IViewPart
,IWorkbenchPart2
,IWorkbenchPart3
- All Known Implementing Classes:
AbstractDebugView
,AbstractDecoratedTextEditor
,AbstractMultiEditor
,AbstractTextEditor
,CommonNavigator
,CommonSourceNotFoundEditor
,ContentOutline
,EditorPart
,org.eclipse.ui.internal.views.markers.ExtendedMarkersView
,FormEditor
,FormPage
,HistoryPageSaveablePart
,MarkerSupportView
,MultiEditor
,MultiPageEditor
,MultiPageEditorPart
,PageBookView
,PageSaveablePart
,ParticipantPageSaveablePart
,ProjectExplorer
,PropertySheet
,ResourceNavigator
,SaveablePartAdapter
,SharedHeaderFormEditor
,StatusTextEditor
,TemplatesView
,TextEditor
,ViewPart
,WorkbenchPart
public interface IWorkbenchPart extends IAdaptable
A workbench part is a visual component within a workbench page. There are two subtypes: view and editor, as defined byIViewPart
andIEditorPart
.A view is typically used to navigate a hierarchy of information (like the workspace), open an editor, or display properties for the active editor. Modifications made in a view are saved immediately.
An editor is typically used to edit or browse a document or input object. The input is identified using an
IEditorInput
. Modifications made in an editor part follow an open-save-close lifecycle model.This interface may be implemented directly. For convenience, a base implementation is defined in
WorkbenchPart
.The lifecycle of a workbench part is as follows:
- When a part extension is created:
- instantiate the part
- create a part site
- call
part.init(site)
- When a part becomes visible in the workbench:
- add part to presentation by calling
part.createPartControl(parent)
to create actual widgets - fire
partOpened
event to all listeners
- add part to presentation by calling
- When a part is activated or gets focus:
- call
part.setFocus()
- fire
partActivated
event to all listeners
- call
- When a part is closed:
- if save is needed, do save; if it fails or is canceled return
- if part is active, deactivate part
- fire
partClosed
event to all listeners - remove part from presentation; part controls are disposed as part of the SWT widget tree
- call
part.dispose()
After
createPartControl
has been called, the implementor may safely reference the controls created. When the part is closed these controls will be disposed as part of an SWT composite. This occurs before theIWorkbenchPart.dispose
method is called. If there is a need to free SWT resources the part should define a dispose listener for its own control and free those resources from the dispose listener. If the part invokes any method on the disposed SWT controls after this point anSWTError
will be thrown.The last method called on
IWorkbenchPart
isdispose
. This signals the end of the part lifecycle.An important point to note about this lifecycle is that following a call to init, createPartControl may never be called. Thus in the dispose method, implementors must not assume controls were created.
Workbench parts implement the
IAdaptable
interface; extensions are managed by the platform's adapter manager.- See Also:
IViewPart
,IEditorPart
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Field Summary
Fields Modifier and Type Field Description static int
PROP_TITLE
The property id forgetTitle
,getTitleImage
andgetTitleToolTip
.
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Method Summary
All Methods Instance Methods Abstract Methods Modifier and Type Method Description void
addPropertyListener(IPropertyListener listener)
Adds a listener for changes to properties of this workbench part.void
createPartControl(Composite parent)
Creates the SWT controls for this workbench part.void
dispose()
Disposes of this workbench part.IWorkbenchPartSite
getSite()
Returns the site for this workbench part.String
getTitle()
Returns the title of this workbench part.Image
getTitleImage()
Returns the title image of this workbench part.String
getTitleToolTip()
Returns the title tool tip text of this workbench part.void
removePropertyListener(IPropertyListener listener)
Removes the given property listener from this workbench part.void
setFocus()
Asks this part to take focus within the workbench.-
Methods inherited from interface org.eclipse.core.runtime.IAdaptable
getAdapter
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Field Detail
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PROP_TITLE
static final int PROP_TITLE
The property id forgetTitle
,getTitleImage
andgetTitleToolTip
.- See Also:
- Constant Field Values
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Method Detail
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addPropertyListener
void addPropertyListener(IPropertyListener listener)
Adds a listener for changes to properties of this workbench part. Has no effect if an identical listener is already registered.The property ids are defined in
IWorkbenchPartConstants
.- Parameters:
listener
- a property listener
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createPartControl
void createPartControl(Composite parent)
Creates the SWT controls for this workbench part.Clients should not call this method (the workbench calls this method when it needs to, which may be never).
For implementors this is a multi-step process:
- Create one or more controls within the parent.
- Set the parent layout as needed.
- Register any global actions with the site's
IActionBars
. - Register any context menus with the site.
- Register a selection provider with the site, to make it available to the
workbench's
ISelectionService
(optional).
- Parameters:
parent
- the parent control
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dispose
void dispose()
Disposes of this workbench part.This is the last method called on the
IWorkbenchPart
. At this point the part controls (if they were ever created) have been disposed as part of an SWT composite. There is no guarantee that createPartControl() has been called, so the part controls may never have been created.Within this method a part may release any resources, fonts, images, etc. held by this part. It is also very important to deregister all listeners from the workbench.
Clients should not call this method (the workbench calls this method at appropriate times).
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getSite
IWorkbenchPartSite getSite()
Returns the site for this workbench part. The site can benull
while the workbench part is being initialized. After the initialization is complete, this value must be non-null
for the remainder of the part's life cycle.- Returns:
- The part site; this value may be
null
if the part has not yet been initialized
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getTitle
String getTitle()
Returns the title of this workbench part. If this value changes the part must fire a property listener event withPROP_TITLE
.The title is used to populate the title bar of this part's visual container.
- Returns:
- the workbench part title (not
null
)
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getTitleImage
Image getTitleImage()
Returns the title image of this workbench part. If this value changes the part must fire a property listener event withPROP_TITLE
.The title image is usually used to populate the title bar of this part's visual container. Since this image is managed by the part itself, callers must not dispose the returned image.
- Returns:
- the title image
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getTitleToolTip
String getTitleToolTip()
Returns the title tool tip text of this workbench part. An empty string result indicates no tool tip. If this value changes the part must fire a property listener event withPROP_TITLE
.The tool tip text is used to populate the title bar of this part's visual container.
- Returns:
- the workbench part title tool tip (not
null
)
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removePropertyListener
void removePropertyListener(IPropertyListener listener)
Removes the given property listener from this workbench part. Has no effect if an identical listener is not registered.- Parameters:
listener
- a property listener
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setFocus
void setFocus()
Asks this part to take focus within the workbench. Parts must assign focus to one of the controls contained in the part's parent composite.Clients should not call this method (the workbench calls this method at appropriate times). To have the workbench activate a part, use
IWorkbenchPage.activate(IWorkbenchPart) instead
.
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