synergyviewmvc.media.ui.MediaPreviewControl.java Source code

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Here is the source code for synergyviewmvc.media.ui.MediaPreviewControl.java

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/**
  *  File: AbstractMediaPreviewControl.java
 *  Copyright (c) 2010
 *  phyo
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

package synergyviewmvc.media.ui;

import java.util.HashMap;
import java.util.Map;

import org.eclipse.core.databinding.observable.map.IMapChangeListener;
import org.eclipse.core.databinding.observable.map.IObservableMap;
import org.eclipse.core.databinding.observable.map.MapChangeEvent;
import org.eclipse.core.databinding.observable.map.WritableMap;
import org.eclipse.jface.databinding.swt.SWTObservables;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.DisposeEvent;
import org.eclipse.swt.events.DisposeListener;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;

import synergyviewmvc.media.model.AbstractMedia;

/**
 * @author phyo
 *
 */
public class MediaPreviewControl extends Composite {

    private Map<AbstractMedia, MediaSwtAwtComposite> mediaSwtAwtCompositeList = new HashMap<AbstractMedia, MediaSwtAwtComposite>();
    private IObservableMap observableMediaPreviewMap;
    private IMapChangeListener mapChangedListener;

    public IObservableMap getObservableMediaPreviewList() {
        return observableMediaPreviewMap;
    }

    /**
     * @param parent
     * @param style
     */
    public MediaPreviewControl(Composite parent, int style) {
        super(parent, style);
        this.setLayout(new FillLayout(SWT.HORIZONTAL));
        this.addDisposeListener(new DisposeListener() {

            public void widgetDisposed(DisposeEvent e) {
                disposeResourse();
            }

        });
        observableMediaPreviewMap = new WritableMap(SWTObservables.getRealm(parent.getDisplay()), String.class,
                AbstractMedia.class);
        mapChangedListener = new IMapChangeListener() {

            public void handleMapChange(MapChangeEvent arg0) {
                for (Object key : arg0.diff.getAddedKeys()) {
                    MediaSwtAwtComposite mediaComposite = new MediaSwtAwtComposite(MediaPreviewControl.this,
                            SWT.None);
                    mediaComposite.addMedia((AbstractMedia) observableMediaPreviewMap.get(key));
                    mediaSwtAwtCompositeList.put((AbstractMedia) observableMediaPreviewMap.get(key),
                            mediaComposite);
                }
                for (Object key : arg0.diff.getRemovedKeys()) {
                    AbstractMedia media = (AbstractMedia) arg0.diff.getOldValue(key);
                    mediaSwtAwtCompositeList.get(media).dispose();
                    mediaSwtAwtCompositeList.remove(media);
                }
                MediaPreviewControl.this.layout(true);

            }

        };

        observableMediaPreviewMap.addMapChangeListener(mapChangedListener);
    }

    private void disposeResourse() {
        observableMediaPreviewMap.clear();
        observableMediaPreviewMap.removeMapChangeListener(mapChangedListener);
    }
}