1 /******************************************************************************* 2 * Copyright (c) 2011 Wind River Systems and others. 3 * 4 * This program and the accompanying materials 5 * are made available under the terms of the Eclipse Public License 2.0 6 * which accompanies this distribution, and is available at 7 * https://www.eclipse.org/legal/epl-2.0/ 8 * 9 * SPDX-License-Identifier: EPL-2.0 10 * 11 * Contributors: 12 * Wind River Systems - initial API and implementation 13 *******************************************************************************/ 14 package org.eclipse.debug.internal.ui.viewers.model.provisional; 15 16 17 /** 18 * A validator to be used with a VirtualTreeModelViewer to determine which viewer 19 * items should be updated by the viewer. 20 * 21 * @see VirtualTreeModelViewer 22 * @since 3.8 23 */ 24 public interface IVirtualItemValidator { 25 26 /** 27 * Allows the validator to determine whether the given item is to be deemed 28 * visible in the virtual tree. 29 * 30 * @param item Item to be tested. 31 * @return returns true if the item should be considered visible. 32 */ isItemVisible(VirtualItem item)33 boolean isItemVisible(VirtualItem item); 34 35 /** 36 * Indicates that the viewer requested to reveal the given item in viewer. 37 * 38 * @param item Item to show. 39 */ showItem(VirtualItem item)40 void showItem(VirtualItem item); 41 } 42