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/*******************************************************************************
* Copyright (c) 2005 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.debug.internal.ui.viewers.update;
import org.eclipse.debug.core.DebugEvent;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IExpression;
import org.eclipse.debug.internal.ui.viewers.IModelDelta;
import org.eclipse.debug.internal.ui.viewers.IModelDeltaNode;
import org.eclipse.debug.internal.ui.viewers.IModelProxy;
/**
* Event handler for an expression.
*
* @since 3.2
*
*/
public class ExpressionEventHandler extends DebugEventHandler {
public ExpressionEventHandler(IModelProxy proxy) {
super(proxy);
}
protected boolean handlesEvent(DebugEvent event) {
return event.getKind() == DebugEvent.CHANGE;
}
protected void handleChange(DebugEvent event) {
ModelDelta delta = new ModelDelta();
IModelDeltaNode node = delta.addNode(DebugPlugin.getDefault().getExpressionManager(), IModelDelta.NOCHANGE);
IExpression expression = null;
if (event.getSource() instanceof IExpression) {
expression = (IExpression) event.getSource();
} else {
expression = ((DefaultExpressionModelProxy)getModelProxy()).getExpression();
}
if (expression != null) {
node.addNode(expression, IModelDelta.CHANGED | IModelDelta.CONTENT | IModelDelta.STATE);
getModelProxy().fireModelChanged(delta);
}
}
protected void refreshRoot(DebugEvent event) {
ModelDelta delta = new ModelDelta();
delta.addNode(DebugPlugin.getDefault().getExpressionManager(), IModelDelta.CHANGED | IModelDelta.CONTENT);
getModelProxy().fireModelChanged(delta);
}
}
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