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view org.eclipse.jface.databinding/src/org/eclipse/jface/internal/databinding/viewers/ViewerUpdater.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 | 6be48cf9f95c |
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/******************************************************************************* * Copyright (c) 2008 Matthew Hall 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: * Matthew Hall - initial API and implementation (bug 226765) ******************************************************************************/ module org.eclipse.jface.internal.databinding.viewers.ViewerUpdater; import java.lang.all; import org.eclipse.jface.util.Util; import org.eclipse.jface.viewers.IElementComparer; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.jface.viewers.StructuredViewer; /** * NON-API - An interface for updating a viewer's elements. * * @since 1.2 */ public abstract class ViewerUpdater { private final StructuredViewer viewer; /** * Constructs a ViewerUpdater for updating the specified viewer. * * @param viewer * the viewer which will be updated through this instance. */ protected this(StructuredViewer viewer) { this.viewer = viewer; } /** * Insert the element into the viewer at the specified position. * * @param element * the element to add * @param position * the position of the element */ public abstract void insert(Object element, int position); /** * Remove the element from the viewer * * @param element * the element to remove * @param position * the position of the element */ public abstract void remove(Object element, int position); /** * Replace the specified element at the given position with the new element. * * @param oldElement * the element being replaced * @param newElement * the element that replaces <code>oldElement</code> * @param position * the position of the element being replaced. */ public void replace(Object oldElement, Object newElement, int position) { remove(oldElement, position); insert(newElement, position); } /** * Moves the specified element from the specified old position to the * specified new position. No action is taken if the viewer has a sorter or * filter(s). * * @param element * the element being moved * @param oldPosition * the position of the element before it is moved * @param newPosition * the position of the element after it is moved */ public void move(Object element, int oldPosition, int newPosition) { if (viewer.getComparator() is null && viewer.getFilters().length is 0) { IStructuredSelection selection = cast(IStructuredSelection) viewer .getSelection(); remove(element, oldPosition); insert(element, newPosition); // Preserve selection if (!selection.isEmpty()) { IElementComparer comparer = viewer.getComparer(); Object[] selectedElements = selection.toArray(); for (int i = 0; i < selectedElements.length; i++) { if (comparer is null ? Util.opEquals(element, selectedElements[i]) : comparer.opEquals(element, selectedElements[i])) { viewer.setSelection(selection); break; } } } } } /** * Adds the elements to the viewer. * * @param elements * the elements to add */ public abstract void add(Object[] elements); /** * Removes the elements from the viewer * * @param elements * the elements to remove */ public abstract void remove(Object[] elements); }