Package org.eclipse.ui.progress
Interface IDeferredWorkbenchAdapter
- All Superinterfaces:
IWorkbenchAdapter
- All Known Implementing Classes:
DeferredDebugElementWorkbenchAdapter
This adapter interface provides support for lazy initialization of UI
workbench elements that are displayed visually. This adapter is used with an
associated deferred content provider.
- Since:
- 3.0
- See Also:
-
Method Summary
Modifier and TypeMethodDescriptionvoid
fetchDeferredChildren
(Object object, IElementCollector collector, IProgressMonitor monitor) Called by a job run in a separate thread to fetch the children of this adapter.Returns the rule used to schedule the deferred fetching of children for this adapter.boolean
Returns whether this adapter may have children.Methods inherited from interface org.eclipse.ui.model.IWorkbenchAdapter
getChildren, getImageDescriptor, getLabel, getParent
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Method Details
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fetchDeferredChildren
Called by a job run in a separate thread to fetch the children of this adapter. The adapter should in return notify of new children via the collector. This is generally used when a content provider is getting elements.It is good practice to check the passed in monitor for cancellation. This will provide good responsiveness for cancellation requests made by the user.
- Parameters:
object
- the object to fetch the children forcollector
- the collector to notify about new children. Should not benull
.monitor
- a progress monitor that will never benull
to support reporting and cancellation.
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isContainer
boolean isContainer()Returns whether this adapter may have children. This is an optimized method used by content providers to allow showing the [+] expand icon without having yet fetched the children for the element.If
false
is returned, then the content provider may assume that this adapter has no children. Iftrue
is returned, then the job manager may assume that this adapter may have children.- Returns:
true
if the adapter may have childen, andfalse
otherwise.
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getRule
Returns the rule used to schedule the deferred fetching of children for this adapter.- Parameters:
object
- the object whose children are being fetched- Returns:
- the scheduling rule. May be
null
. - See Also:
-