synergyviewcore.media.ui.MediaPreviewControl.java Source code

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Here is the source code for synergyviewcore.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 synergyviewcore.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 synergyviewcore.media.model.AbstractMedia;

/**
 * The Class MediaPreviewControl.
 * 
 * @author phyo
 */
public class MediaPreviewControl extends Composite {

    /** The _map changed listener. */
    private IMapChangeListener _mapChangedListener;

    /** The _observable media preview list. */
    private IObservableMap _observableMediaPreviewList;

    /** The media swt awt composite list. */
    private Map<AbstractMedia, MediaSwtAwtComposite> mediaSwtAwtCompositeList = new HashMap<AbstractMedia, MediaSwtAwtComposite>();

    /**
     * Instantiates a new media preview control.
     * 
     * @param parent
     *            the parent
     * @param style
     *            the 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();
            }

        });
        _observableMediaPreviewList = 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) _observableMediaPreviewList.get(key));
                    mediaSwtAwtCompositeList.put((AbstractMedia) _observableMediaPreviewList.get(key),
                            mediaComposite);
                }
                for (Object key : arg0.diff.getRemovedKeys()) {
                    AbstractMedia media = (AbstractMedia) arg0.diff.getOldValue(key);
                    if (media != null) {
                        mediaSwtAwtCompositeList.get(media).dispose();
                        mediaSwtAwtCompositeList.remove(media);
                    }
                }
                MediaPreviewControl.this.layout(true);

            }

        };

        _observableMediaPreviewList.addMapChangeListener(_mapChangedListener);
    }

    /**
     * Dispose resourse.
     */
    private void disposeResourse() {
        _observableMediaPreviewList.clear();
        _observableMediaPreviewList.removeMapChangeListener(_mapChangedListener);
    }

    /**
     * Gets the observable media preview list.
     * 
     * @return the observable media preview list
     */
    public IObservableMap getObservableMediaPreviewList() {
        return _observableMediaPreviewList;
    }
}