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+/*************************************************************************
+ *
+ * $RCSfile: DynamicAccessibilityNode.java,v $
+ *
+ * $Revision: 1.1 $
+ *
+ * last change: $Author: obr $ $Date: 2003/09/19 09:21:40 $
+ *
+ * The Contents of this file are made available subject to the terms of
+ * either of the following licenses
+ *
+ * - GNU Lesser General Public License Version 2.1
+ * - Sun Industry Standards Source License Version 1.1
+ *
+ * Sun Microsystems Inc., October, 2000
+ *
+ * GNU Lesser General Public License Version 2.1
+ * =============================================
+ * Copyright 2000 by Sun Microsystems, Inc.
+ * 901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ *
+ * Sun Industry Standards Source License Version 1.1
+ * =================================================
+ * The contents of this file are subject to the Sun Industry Standards
+ * Source License Version 1.1 (the "License"); You may not use this file
+ * except in compliance with the License. You may obtain a copy of the
+ * License at http://www.openoffice.org/license.html.
+ *
+ * Software provided under this License is provided on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ * See the License for the specific provisions governing your rights and
+ * obligations concerning the Software.
+ *
+ * The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ * Copyright: 2000 by Sun Microsystems, Inc.
+ *
+ * All Rights Reserved.
+ *
+ * Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+package org.openoffice.accessibility.awb.tree;
+
+import com.sun.star.uno.UnoRuntime;
+import com.sun.star.accessibility.XAccessible;
+import com.sun.star.accessibility.XAccessibleContext;
+
+/*
+ * This class is dynamic in the way that it does not contain any children
+ * until the node is going to be expanded. It also releases all children
+ * as soon as the node is collapsed again.
+ */
+class DynamicAccessibilityNode extends AccessibilityNode {
+
+ public DynamicAccessibilityNode(AccessibilityModel treeModel) {
+ super(treeModel);
+ }
+
+ // Populates the child list. Called by AccessibilityMode.treeWillExpand().
+ protected void populate() {
+ try {
+ XAccessibleContext xAC = getAccessibleContext();
+ if (xAC != null) {
+ int n = xAC.getAccessibleChildCount();
+ for (int i=0; i<n; i++) {
+ XAccessible xAccessible = xAC.getAccessibleChild(i);
+ AccessibilityNode node = treeModel.findNode(xAccessible);
+ if (node == null) {
+ node = treeModel.createNode(xAccessible);
+ }
+ if (node != null) {
+ // NOTE: do not send any tree notifications here !
+ add(node);
+ }
+ }
+ }
+ } catch (com.sun.star.lang.IndexOutOfBoundsException e) {
+ // This should never happen since we previously checked the child
+ // count.
+ // FIXME: error message
+ } catch (com.sun.star.uno.RuntimeException e) {
+ // FIXME: error message
+ }
+ }
+
+ // Clears the child list. Called by AccessibilityModel.treeCollapsed().
+ protected void clear() {
+ removeAllChildren();
+ }
+
+ /* This is called whenever the node is painted, no matter if collapsed
+ * or expanded. Making this a "life" value seems to be appropriate.
+ */
+ public boolean isLeaf() {
+ try {
+ XAccessibleContext xAC = getAccessibleContext();
+ if (xAC != null) {
+ return xAC.getAccessibleChildCount() == 0;
+ }
+ return true;
+ } catch (com.sun.star.uno.RuntimeException e) {
+ return true;
+ }
+ }
+
+}