public class BaseWorkbenchContentProvider extends Object implements ITreeContentProvider
IWorkbenchAdapter.
This class may be instantiated, or subclassed.
IWorkbenchAdapter| Constructor and Description |
|---|
BaseWorkbenchContentProvider()
Creates a new workbench content provider.
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| Modifier and Type | Method and Description |
|---|---|
void |
dispose()
Disposes of this content provider.
|
protected IWorkbenchAdapter |
getAdapter(Object element)
Returns the implementation of IWorkbenchAdapter for the given
object.
|
Object[] |
getChildren(Object element)
Returns the child elements of the given parent element.
|
Object[] |
getElements(Object element)
Returns the elements to display in the viewer
when its input is set to the given element.
|
Object |
getParent(Object element)
Returns the parent for the given element, or
null
indicating that the parent can't be computed. |
boolean |
hasChildren(Object element)
Returns whether the given element has children.
|
void |
inputChanged(Viewer viewer,
Object oldInput,
Object newInput)
Notifies this content provider that the given viewer's input
has been switched to a different element.
|
public BaseWorkbenchContentProvider()
public void dispose()
IContentProviderThe viewer should not be updated during this call, as it is in the process of being disposed.
dispose in interface IContentProviderprotected IWorkbenchAdapter getAdapter(Object element)
element - the elementpublic Object[] getChildren(Object element)
ITreeContentProvider
The difference between this method and IStructuredContentProvider.getElements
is that getElements is called to obtain the
tree viewer's root elements, whereas getChildren is used
to obtain the children of a given parent element in the tree (including a root).
getChildren in interface ITreeContentProviderelement - the parent elementpublic Object[] getElements(Object element)
IStructuredContentProvidergetElements in interface IStructuredContentProviderelement - the input elementpublic Object getParent(Object element)
ITreeContentProvidernull
indicating that the parent can't be computed.
In this case the tree-structured viewer can't expand
a given node correctly if requested.getParent in interface ITreeContentProviderelement - the elementnull if it
has none or if the parent cannot be computedpublic boolean hasChildren(Object element)
ITreeContentProvider
Intended as an optimization for when the viewer does not
need the actual children. Clients may be able to implement
this more efficiently than getChildren.
hasChildren in interface ITreeContentProviderelement - the elementtrue if the given element has children,
and false if it has no childrenpublic void inputChanged(Viewer viewer, Object oldInput, Object newInput)
IContentProviderA typical use for this method is registering the content provider as a listener to changes on the new input (using model-specific means), and deregistering the viewer from the old input. In response to these change notifications, the content provider should update the viewer (see the add, remove, update and refresh methods on the viewers).
The viewer should not be updated during this call, as it might be in the process of being disposed.
inputChanged in interface IContentProviderviewer - the vieweroldInput - the old input element, or null if the viewer
did not previously have an inputnewInput - the new input element, or null if the viewer
does not have an inputGuidelines for using Eclipse APIs. Copyright (c) IBM Corp. and others 2000, 2006. All rights reserved.