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/*******************************************************************************
* Copyright (c) 2004, 2009 Tasktop Technologies 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:
* Tasktop Technologies - initial API and implementation
*******************************************************************************/
package org.eclipse.mylyn.commons.ui;
import org.eclipse.core.commands.common.EventManager;
import org.eclipse.core.runtime.SafeRunner;
import org.eclipse.jface.util.SafeRunnable;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;
/**
* Provides an simple implementation of {@link ISelectionProvider} that propagates selection events to registered
* listeners.
*
* @author Steffen Pingel
* @since 3.7
*/
public class SelectionProviderAdapter extends EventManager implements ISelectionProvider, ISelectionChangedListener {
private ISelection selection;
/**
* Constructs a <code>SelectionProviderAdapter</code> and initializes the selection to <code>selection</code>.
*
* @param selection
* the initial selection
* @see #setSelection(ISelection)
*/
public SelectionProviderAdapter(ISelection selection) {
setSelection(selection);
}
/**
* Constructs a <code>SelectionProviderAdapter</code> with a <code>null</code> selection.
*/
public SelectionProviderAdapter() {
}
public void addSelectionChangedListener(ISelectionChangedListener listener) {
addListenerObject(listener);
}
public ISelection getSelection() {
return selection;
}
public void removeSelectionChangedListener(ISelectionChangedListener listener) {
removeListenerObject(listener);
}
public void selectionChanged(final SelectionChangedEvent event) {
this.selection = event.getSelection();
Object[] listeners = getListeners();
for (Object listener2 : listeners) {
final ISelectionChangedListener listener = (ISelectionChangedListener) listener2;
SafeRunner.run(new SafeRunnable() {
public void run() {
listener.selectionChanged(event);
}
});
}
}
public void setSelection(ISelection selection) {
selectionChanged(new SelectionChangedEvent(this, selection));
}
}
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