org.eclipse.servicesregistry.search.ui.internal.classifications.ClassificationsTreeLabelProvider.java Source code

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Here is the source code for org.eclipse.servicesregistry.search.ui.internal.classifications.ClassificationsTreeLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2012 SAP AG 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:
 *     SAP AG - initial API and implementation
 *******************************************************************************/
package org.eclipse.servicesregistry.search.ui.internal.classifications;

import java.net.URL;

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.LabelProvider;
import org.eclipse.servicesregistry.core.classifications.IClassificationSystemNode;
import org.eclipse.servicesregistry.core.classifications.IClassificationValueNode;
import org.eclipse.servicesregistry.core.classifications.ITreeNode;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.PlatformUI;

public class ClassificationsTreeLabelProvider extends LabelProvider {
    private final ResourceManager resourceManager;

    public ClassificationsTreeLabelProvider() {
        resourceManager = createResourceManager();
    }

    @Override
    public String getText(Object element) {
        assert element instanceof ITreeNode;

        return ((ITreeNode) element).getName();
    }

    @Override
    public Image getImage(Object element) {
        return resourceManager.createImage(imgDescriptorFor(element));
    }

    @Override
    public void dispose() {
        super.dispose();
        resourceManager.dispose();
    }

    private ResourceManager createResourceManager() {
        return new LocalResourceManager(JFaceResources.getResources(PlatformUI.getWorkbench().getDisplay()));
    }

    private URL iconURLFor(final Object element) {
        if (element instanceof IClassificationSystemNode) {
            return getIcon("classification-system.gif");
        }

        if (element instanceof IClassificationValueNode) {
            return iconUrlForClassificationValue((IClassificationValueNode) element);
        }

        return null;
    }

    private URL iconUrlForClassificationValue(final IClassificationValueNode element) {
        return element.isSelected() ? getIcon("selected-classification-value.gif")
                : getIcon("unselected-classification-value.gif");
    }

    private ImageDescriptor imgDescriptorFor(final Object element) {
        return ImageDescriptor.createFromURL(iconURLFor(element));
    }

    private URL getIcon(final String relFileName) {
        return getClass().getClassLoader().getResource("/icons/" + relFileName); //$NON-NLS-1$
    }
}