org.csstudio.utility.chat.GroupMemberLabelProvider.java Source code

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Here is the source code for org.csstudio.utility.chat.GroupMemberLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2011 Oak Ridge National Laboratory.
 * 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
 ******************************************************************************/
package org.csstudio.utility.chat;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.CellLabelProvider;
import org.eclipse.jface.viewers.ViewerCell;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Display;

/** Label provider for table that shows chat group members
 *  @author Kay Kasemir
 */
@SuppressWarnings("nls")
public class GroupMemberLabelProvider extends CellLabelProvider {
    private static final String ICON_NAME = "icons/person-small16.png";
    private Image icon = null;

    /** Dispose icon
     *  {@inheritDoc}
     */
    @Override
    public void dispose() {
        if (icon != null) {
            icon.dispose();
            icon = null;
        }
        super.dispose();
    }

    @Override
    public String getToolTipText(final Object element) {
        final Person person = (Person) element;
        return person.getAddress();
    }

    /** Display name of member with generic icon
     *  {@inheritDoc}
     */
    @Override
    public void update(final ViewerCell cell) {
        final Person person = (Person) cell.getElement();
        cell.setText(person.getName());

        if (icon == null) {
            final ImageDescriptor descr = Activator.getImage(ICON_NAME);
            if (descr == null) // Running as standalone demo?
                icon = new Image(Display.getCurrent(), ICON_NAME);
            else
                icon = descr.createImage();
        }
        cell.setImage(icon);
    }
}