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org.eclipse.ui.progress
Interface IDeferredWorkbenchAdapter
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All Superinterfaces:
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IWorkbenchAdapter
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All Known Implementing Classes:
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DeferredDebugElementWorkbenchAdapter
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public interface IDeferredWorkbenchAdapter
- extends
IWorkbenchAdapter
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.
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Since:
- 3.0
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See Also:
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DeferredTreeContentManager
fetchDeferredChildren
void fetchDeferredChildren(
Object object,
IElementCollector collector,
IProgressMonitor monitor)
- 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.
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Parameters:
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object - the object to fetch the children for -
collector - the collector to notify about new children. Should not
be null . -
monitor - a progress monitor that will never be null to
support reporting and cancellation.
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. If true is returned,
then the job manager may assume that this adapter may have children.
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Returns:
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true if the adapter may have childen, and false
otherwise.
getRule
ISchedulingRule getRule(
Object object)
- Returns the rule used to schedule the deferred fetching of children for this adapter.
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Parameters:
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object - the object whose children are being fetched
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Returns:
- the scheduling rule. May be
null . -
See Also:
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Job.setRule(ISchedulingRule)
Guidelines for using Eclipse APIs.
Copyright (c) Eclipse contributors and others 2000, 2008. All rights reserved.
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