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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;
}
}
}
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