Package org.eclipse.handly.ui.viewer
Class DeferredElementTreeContentProvider
java.lang.Object
org.eclipse.handly.ui.viewer.DeferredTreeContentProvider
org.eclipse.handly.ui.viewer.DeferredElementTreeContentProvider
- All Implemented Interfaces:
org.eclipse.jface.viewers.IContentProvider,org.eclipse.jface.viewers.IStructuredContentProvider,org.eclipse.jface.viewers.ITreeContentProvider
A deferred content provider for
IElements.
Uses the existing structure of the elements.- Since:
- 1.5
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected static final Object[]A zero-length array of the runtime typeObject[]. -
Constructor Summary
ConstructorsConstructorDescriptionDeferredElementTreeContentProvider(org.eclipse.jface.viewers.AbstractTreeViewer viewer, org.eclipse.ui.IWorkbenchPartSite site) Creates a new instance of the content provider. -
Method Summary
Modifier and TypeMethodDescriptionprotected voidfetchDeferredChildren(Object parentElement, org.eclipse.ui.progress.IElementCollector collector, org.eclipse.core.runtime.IProgressMonitor monitor) Called by a job to fetch the child elements of the given parent element.Object[]getChildren(Object parentElement) Object[]getElements(Object inputElement) protected Object[]getImmediateChildren(Object parentElement) Returns the child elements of the given parent element.protected org.eclipse.core.runtime.jobs.ISchedulingRuleReturns the rule used to schedule the deferred fetching of children for the given parent element.booleanhasChildren(Object element) protected booleanshouldDefer(Object element) Returns whether the given element should be processed via deferred tree content manager.Methods inherited from class org.eclipse.handly.ui.viewer.DeferredTreeContentProvider
getDeferredTreeContentManager, getLabel, inputChangedMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.eclipse.jface.viewers.IContentProvider
dispose
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Field Details
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NO_CHILDREN
A zero-length array of the runtime typeObject[].
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Constructor Details
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DeferredElementTreeContentProvider
public DeferredElementTreeContentProvider(org.eclipse.jface.viewers.AbstractTreeViewer viewer, org.eclipse.ui.IWorkbenchPartSite site) Creates a new instance of the content provider.- Parameters:
viewer- the tree viewer that will use this content provider (notnull)site- the site of the containing workbench part (may benull)
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Method Details
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getElements
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getChildren
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getParent
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hasChildren
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shouldDefer
Returns whether the given element should be processed via deferred tree content manager.- Parameters:
element- an element- Returns:
trueif the given element should be processed via deferred tree content manager, andfalseotherwise
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getImmediateChildren
Returns the child elements of the given parent element.Default implementation invokes
Elements.getChildren((IElement)parentElement)if the parent element is an IElement. Subclasses may override or extend.- Parameters:
parentElement- the parent element- Returns:
- an array of child elements (not
null)
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fetchDeferredChildren
protected void fetchDeferredChildren(Object parentElement, org.eclipse.ui.progress.IElementCollector collector, org.eclipse.core.runtime.IProgressMonitor monitor) Description copied from class:DeferredTreeContentProviderCalled by a job to fetch the child elements of the given parent element. This method should report the fetched elements via the given collector.- Specified by:
fetchDeferredChildrenin classDeferredTreeContentProvider- Parameters:
parentElement- the parent elementcollector- the element collector (nevernull)monitor- a progress monitor to support reporting and cancellation (nevernull)
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getRule
Returns the rule used to schedule the deferred fetching of children for the given parent element.DeferredElementTreeContentProvider's implementation of this method always returnsnull.- Overrides:
getRulein classDeferredTreeContentProvider- Parameters:
parentElement- the parent element- Returns:
- the scheduling rule. May be
null - See Also:
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