chartselectionprovider.java

EclipseTrader is a stock exchange analysis system, featuring shares pricing watch, intraday and hi

/*
 * Copyright (c) 2004-2006 Marco Maccaferri 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:
 *     Marco Maccaferri - initial API and implementation
 */

package net.sourceforge.eclipsetrader.charts.events;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

import net.sourceforge.eclipsetrader.core.ui.NullSelection;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;

public class ChartSelectionProvider implements ISelectionProvider
{
    private ISelection selection = new NullSelection();
    private List listeners = new ArrayList();

    public ChartSelectionProvider()
    {
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#addSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
     */
    public void addSelectionChangedListener(ISelectionChangedListener listener)
    {
        listeners.add(listener);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#getSelection()
     */
    public ISelection getSelection()
    {
        return selection;
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#removeSelectionChangedListener(org.eclipse.jface.viewers.ISelectionChangedListener)
     */
    public void removeSelectionChangedListener(ISelectionChangedListener listener)
    {
        listeners.remove(listener);
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.viewers.ISelectionProvider#setSelection(org.eclipse.jface.viewers.ISelection)
     */
    public void setSelection(ISelection selection)
    {
        this.selection = selection;
        SelectionChangedEvent event = new SelectionChangedEvent(this, selection);
        for (Iterator iter = listeners.iterator(); iter.hasNext(); )
            ((ISelectionChangedListener)iter.next()).selectionChanged(event);
    }
}