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/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 .
*/
import com.sun.star.awt.XWindow;
import com.sun.star.awt.XExtendedToolkit;
import com.sun.star.accessibility.XAccessible;
import com.sun.star.accessibility.XAccessibleContext;
import com.sun.star.uno.UnoRuntime;
/** Listen for top window events and create or delete children of the tree
model accordingly.
*/
class TopWindowListener
{
TopWindowListener (AccessibilityTreeModel aModel, SimpleOffice aOffice)
{
maModel = aModel;
maOffice = aOffice;
}
/** Use this function to initially fill the accessibility object tree
view with nodes for top level windows.
*/
public void Initialize ()
{
XExtendedToolkit xToolkit = maOffice.getExtendedToolkit();
if (xToolkit != null)
{
maModel.lock ();
int nTopWindowCount = xToolkit.getTopWindowCount();
MessageArea.println ("There are " + nTopWindowCount + " top windows.");
for (int i=0; i<nTopWindowCount; i++)
{
try
{
XAccessible xAccessible = maOffice.getAccessibleObject(
xToolkit.getTopWindow (i));
// Uncomment the following line to get the real root of
// the accessible tree that xAccessible belongs to.
// xAccessible = maOffice.getAccessibleRoot(xAccessible);
AddTopLevelNode (xAccessible);
}
catch (Exception e)
{
System.out.println ("caught exception: " + e);
e.printStackTrace();
}
}
maModel.unlock ((AccessibleTreeNode)maModel.getRoot());
}
}
/** Add a new top level node which, to be exact, will be placed on the
second layer of the tree.
@param xNewTopLevelObject
The accessible object of the new top level window.
*/
private void AddTopLevelNode (XAccessible xNewTopLevelObject)
{
System.out.println ("adding top level window");
if (xNewTopLevelObject != null)
{
XAccessibleContext xContext = xNewTopLevelObject.getAccessibleContext();
if (xContext == null)
System.out.println ("top level window not accessible");
else
{
Object aRootObject = maModel.getRoot();
if (aRootObject instanceof VectorNode)
{
VectorNode aRoot = (VectorNode) aRootObject;
AccessibleTreeNode aNode =
NodeFactory.Instance().createDefaultNode (xNewTopLevelObject, aRoot);
aRoot.addChild (aNode);
maModel.fireTreeNodesInserted (maModel.createEvent (aRoot, aNode));
}
}
}
}
/** Remove an existing top level node from the tree.
@param xNewTopLevelObject
The accessible object to remove.
*/
private void RemoveTopLevelNode (XAccessible xTopLevelObject)
{
Object aObject = maModel.getRoot();
if (aObject instanceof VectorNode && xTopLevelObject != null)
{
System.out.println ("removing node " + xTopLevelObject);
maModel.removeNode (xTopLevelObject.getAccessibleContext());
}
}
// XTopWindowListener
public void windowOpened (final com.sun.star.lang.EventObject aEvent)
throws RuntimeException
{
if (maModel != null)
{
XWindow xWindow = UnoRuntime.queryInterface(
XWindow.class, aEvent.Source);
if (xWindow == null)
System.out.println ("event source is no XWindow");
else
{
XAccessible xAccessible = maOffice.getAccessibleObject(xWindow);
if (xAccessible == null)
System.out.println ("event source is no XAccessible");
else
AddTopLevelNode (xAccessible);
}
}
}
public void windowClosed (final com.sun.star.lang.EventObject aEvent)
throws RuntimeException
{
if (maModel != null)
{
XWindow xWindow = UnoRuntime.queryInterface(
XWindow.class, aEvent.Source);
if (xWindow == null)
System.out.println ("event source is no XWindow");
else
{
XAccessible xAccessible = maOffice.getAccessibleObject(xWindow);
if (xAccessible == null)
System.out.println ("event source is no XAccessible");
else
RemoveTopLevelNode (xAccessible);
}
}
}
public void disposing (final com.sun.star.lang.EventObject aEvent)
{
System.out.println ("Top window disposed: " + aEvent);
}
private final AccessibilityTreeModel
maModel;
private final SimpleOffice
maOffice;
}
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