| org.eclipse.jface.viewers.ILazyTreeContentProvider
| ILazyTreeContentProvider | | public interface ILazyTreeContentProvider extends IContentProvider(Code) | | The ILazyTreeContentProvider is the content provider for tree viewers created
using the SWT.VIRTUAL flag that only wish to return their contents as they
are queried.
since:
3.2 |
| getParent | | public Object getParent(Object element)(Code) | | Returns the parent for the given element, or 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.
Parameters:
element - the element the parent element, or null if ithas none or if the parent cannot be computed |
| updateChildCount | | public void updateChildCount(Object element, int currentChildCount)(Code) | | Called when the TreeViewer needs an up-to-date child count for the given
element, for example from
TreeViewer.refresh and
TreeViewer.setInput(Object) . If the content provider knows the
given element, it should respond by calling
TreeViewer.setChildCount(Objectint) . If the given current
child count is already correct, no action has to be taken by this content
provider.
Parameters:
element - The element for which an up-to-date child count is needed, orthe viewer's input if the number of root elements is requested
Parameters:
currentChildCount - The current child count for the element that needs updating |
| updateElement | | public void updateElement(Object parent, int index)(Code) | | Called when a previously-blank item becomes visible in the TreeViewer. If
the content provider knows the child element for the given parent at this
index, it should respond by calling
TreeViewer.replace(ObjectintObject) . The content provider
should also update the child count for any replaced element by calling
TreeViewer.setChildCount(Objectint) . If the given current child
count is already correct, setChildCount does not have to be called since
a call to replace will not change the child count.
NOTE #updateElement(int index) can be used to determine
selection values. If TableViewer#replace(Object, int) is not called
before returning from this method, selections may have missing or stale
elements. In this situation it is suggested that the selection is asked
for again after replace() has been called.
Parameters:
parent - The parent of the element, or the viewer's input if theelement to update is a root element
Parameters:
index - The index of the element to update in the tree |
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