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1 /*******************************************************************************
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2 * Copyright (c) 2006, 2007 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 *******************************************************************************/
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11 module org.eclipse.core.internal.databinding.observable.tree.IChildrenUpdate;
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12
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13 import java.lang.all;
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14
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15 /**
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16 * Context sensitive children update request for a parent and subrange of its
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17 * children.
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18 *
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19 * @since 3.3
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20 */
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21 public interface IChildrenUpdate : IViewerUpdate {
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22
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23 /**
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24 * Returns the parent element that children are being requested for
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25 * as a tree path. An empty path identifies the root element.
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26 *
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27 * @return parent element as a tree path
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28 */
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29 public TreePath getParent();
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30
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31 /**
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32 * Returns the offset at which children have been requested for. This is
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33 * the index of the first child being requested.
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34 *
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35 * @return offset at which children have been requested for
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36 */
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37 public int getOffset();
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38
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39 /**
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40 * Returns the number of children requested.
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41 *
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42 * @return number of children requested
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43 */
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44 public int getLength();
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45
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46 /**
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47 * Sets the child for this request's parent at the given offset.
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48 *
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49 * @param child child
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50 * @param index child offset
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51 *
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52 * TODO: what to do with <code>null</code>
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53 */
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54 public void setChild(Object child, int index);
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55 }
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