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view org.eclipse.jface.databinding/src/org/eclipse/jface/databinding/viewers/ObservableSetContentProvider.d @ 125:c43718956f21 default tip
Updated the snippets status.
author | Jacob Carlborg <doob@me.com> |
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date | Thu, 11 Aug 2011 19:55:14 +0200 |
parents | 0a55d2d5a946 |
children |
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/******************************************************************************* * Copyright (c) 2006, 2008 IBM Corporation and others. * All rights reserved. This program and the accompanying materials * are made available under the terms of the Eclipse Public License v1.0 * which accompanies this distribution, and is available at * http://www.eclipse.org/legal/epl-v10.html * * Contributors: * IBM Corporation - initial API and implementation * Brad Reynolds - bug 116920 * Matthew Hall - bugs 215531, 226765 *******************************************************************************/ module org.eclipse.jface.databinding.viewers.ObservableSetContentProvider; import java.lang.all; import java.util.Set; import org.eclipse.core.databinding.observable.IObservableCollection; import org.eclipse.core.databinding.observable.set.IObservableSet; import org.eclipse.core.databinding.observable.set.ISetChangeListener; import org.eclipse.core.databinding.observable.set.SetChangeEvent; import org.eclipse.core.runtime.Assert; import org.eclipse.jface.internal.databinding.viewers.ObservableCollectionContentProvider; import org.eclipse.jface.viewers.AbstractListViewer; import org.eclipse.jface.viewers.AbstractTableViewer; import org.eclipse.jface.viewers.IStructuredContentProvider; import org.eclipse.jface.viewers.Viewer; /** * A {@link IStructuredContentProvider content provider} for * {@link AbstractTableViewer} or {@link AbstractListViewer} that provides * elements of an {@link IObservableSet} when set as the viewer's input. Objects * of this class listen for changes to the observable set, and will insert and * remove viewer elements to reflect observed changes. * * <p> * This class is not intended to be subclassed by clients. * * @since 1.1 */ public class ObservableSetContentProvider : IStructuredContentProvider { private ObservableCollectionContentProvider impl; private static class Impl : ObservableCollectionContentProvider , ISetChangeListener { protected void checkInput(Object input) { Assert .isTrue(null !is cast(IObservableSet)input, "This content provider only works with input of type IObservableSet"); //$NON-NLS-1$ } protected void addCollectionChangeListener( IObservableCollection collection) { (cast(IObservableSet) collection).addSetChangeListener(this); } protected void removeCollectionChangeListener( IObservableCollection collection) { (cast(IObservableSet) collection).removeSetChangeListener(this); } public void handleSetChange(SetChangeEvent event) { if (isViewerDisposed()) return; Set removals = event.diff.getRemovals(); viewerUpdater.remove(removals.toArray()); knownElements.removeAll(removals); Set additions = event.diff.getAdditions(); knownElements.addAll(additions); viewerUpdater.add(additions.toArray()); } } /** * Constructs an ObservableSetContentProvider */ public this() { impl = new Impl(); } public void inputChanged(Viewer viewer, Object oldInput, Object newInput) { impl.inputChanged(viewer, oldInput, newInput); } public Object[] getElements(Object inputElement) { return impl.getElements(inputElement); } public void dispose() { impl.dispose(); } /** * Returns the set of elements known to this content provider. Label * providers may track this set if they need to be notified about additions * before the viewer sees the added element, and notified about removals * after the element was removed from the viewer. This is intended for use * by label providers, as it will always return the items that need labels. * * @return unmodifiable set of items that will need labels */ public IObservableSet getKnownElements() { return impl.getKnownElements(); } }