org.kalypso.ogc.gml.outline.nodes.ThemeNodeLabelProvider.java Source code

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Here is the source code for org.kalypso.ogc.gml.outline.nodes.ThemeNodeLabelProvider.java

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/*----------------    FILE HEADER KALYPSO ------------------------------------------
 *
 *  This file is part of kalypso.
 *  Copyright (C) 2004 by:
 *
 *  Technical University Hamburg-Harburg (TUHH)
 *  Institute of River and coastal engineering
 *  Denickestrae 22
 *  21073 Hamburg, Germany
 *  http://www.tuhh.de/wb
 *
 *  and
 *
 *  Bjoernsen Consulting Engineers (BCE)
 *  Maria Trost 3
 *  56070 Koblenz, Germany
 *  http://www.bjoernsen.de
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *  Contact:
 *
 *  E-Mail:
 *  belger@bjoernsen.de
 *  schlienger@bjoernsen.de
 *  v.doemming@tuhh.de
 *
 *  ---------------------------------------------------------------------------*/
package org.kalypso.ogc.gml.outline.nodes;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.resource.LocalResourceManager;
import org.eclipse.jface.resource.ResourceManager;
import org.eclipse.jface.viewers.IFontProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Font;
import org.eclipse.swt.graphics.Image;
import org.kalypso.contribs.eclipse.jface.viewers.ITooltipProvider;

/**
 * The this label provider modifies some labels for handling themes, that have only one style.
 * 
 * @author Gernot Belger
 */
public class ThemeNodeLabelProvider extends LabelProvider implements IFontProvider, ITooltipProvider {
    private ResourceManager m_resourceManager;

    @Override
    public void dispose() {
        if (m_resourceManager != null) {
            m_resourceManager.dispose();
            m_resourceManager = null;
        }

        super.dispose();
    }

    /**
     * Lazy load the resource manager
     * 
     * @return The resource manager, create one if necessary
     */
    private ResourceManager getResourceManager() {
        if (m_resourceManager == null)
            m_resourceManager = new LocalResourceManager(JFaceResources.getResources());

        return m_resourceManager;
    }

    @Override
    public String getText(final Object element) {
        final IThemeNode node = (IThemeNode) element;
        return node.getLabel();
    }

    @Override
    public Image getImage(final Object element) {
        final IThemeNode node = (IThemeNode) element;
        final ImageDescriptor descriptor = node.getImageDescriptor();
        if (descriptor == null)
            return null;

        return (Image) getResourceManager().get(descriptor);
    }

    @Override
    public Font getFont(final Object element) {
        final IThemeNode node = (IThemeNode) element;
        return ((IFontProvider) node).getFont(element);
    }

    @Override
    public String getTooltip(final Object element) {
        final IThemeNode node = (IThemeNode) element;
        return node.getDescription();
    }
}