org.eclipse.rcptt.ui.jface.providers.BooleanLabelProvider.java Source code

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Here is the source code for org.eclipse.rcptt.ui.jface.providers.BooleanLabelProvider.java

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/*******************************************************************************
 * Copyright (c) 2009, 2014 Xored Software Inc 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:
 *     Xored Software Inc - initial API and implementation and/or initial documentation
 *******************************************************************************/
package org.eclipse.rcptt.ui.jface.providers;

import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.resource.ImageRegistry;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ColumnLabelProvider;
import org.eclipse.swt.graphics.Image;

/** Draws a checkbox */
public abstract class BooleanLabelProvider extends ColumnLabelProvider {

    private static Image loadImageCached(String cacheKey, String path) {
        ImageRegistry registry = JFaceResources.getImageRegistry();
        synchronized (registry) {
            Image rv = registry.get(cacheKey);
            if (rv == null) {
                registry.put(cacheKey,
                        ImageDescriptor.createFromFile(BooleanLabelProvider.class, "/icons/providers/" + path));
                rv = registry.get(cacheKey);
            }
            assert rv != null;
            return rv;
        }
    }

    static final Image checkedImage = loadImageCached("unchecked", "checked-win.png");
    static final Image uncheckedImage = loadImageCached("checked", "unchecked-win.png");

    @Override
    public final String getText(Object element) {
        return "";
    }

    @Override
    public final Image getImage(Object element) {
        if (isChecked(element)) {
            return checkedImage;
        } else {
            return uncheckedImage;
        }
    }

    public abstract boolean isChecked(Object element);

}