/*******************************************************************************
* Copyright (c) 2000, 2006 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.keys;
import org.eclipse.swt.SWT;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Widget;
/**
* A listener that removes the out-of-order listener if a modification occurs
* before reaching it. This is a workaround for Bug 53497.
*
* @since 3.0
*/
final class CancelOnModifyListener implements Listener {
/**
* The listener to remove when this listener catches any event. This value
* should not be <code>null</code>.
*/
private final Listener chainedListener;
/**
* Constructs a new instance of <code>CancelOnModifyListener</code>
*
* @param listener
* The listener which should be removed in the event of a
* modification event arriving; should not be <code>null</code>.
*/
CancelOnModifyListener(Listener listener) {
chainedListener = listener;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.swt.widgets.Listener#handleEvent(org.eclipse.swt.widgets.Event)
*/
public void handleEvent(Event event) {
Widget widget = event.widget;
widget.removeListener(SWT.Modify, this);
widget.removeListener(SWT.KeyDown, chainedListener);
}
}