public interface ITreeContentProvider extends IStructuredContentProvider
AbstractTreeViewer
Modifier and Type | Method and Description |
---|---|
Object[] |
getChildren(Object parentElement)
Returns the child elements of the given parent element.
|
Object[] |
getElements(Object inputElement)
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.
|
dispose, inputChanged
Object[] getElements(Object inputElement)
NOTE: The returned array must not contain the given
inputElement
, since this leads to recursion issues in
AbstractTreeViewer
(see
bug 9262).
getElements
in interface IStructuredContentProvider
inputElement
- the input elementObject[] getChildren(Object parentElement)
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).
parentElement
- the parent elementObject getParent(Object element)
null
indicating that the parent can't be computed.
In this case the tree-structured viewer can't expand
a given node correctly if requested.element
- the elementnull
if it
has none or if the parent cannot be computedboolean hasChildren(Object element)
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
.
element
- the elementtrue
if the given element has children,
and false
if it has no children
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