org.eclipse.mylyn.internal.java.ui.editor.MylarJavaElementDescriptor.java Source code

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Here is the source code for org.eclipse.mylyn.internal.java.ui.editor.MylarJavaElementDescriptor.java

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/*******************************************************************************
 * Copyright (c) 2004 - 2006 University Of British Columbia 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:
 *     University Of British Columbia - initial API and implementation
 *******************************************************************************/

package org.eclipse.mylyn.internal.java.ui.editor;

import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.util.Assert;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;

/**
 * @author Shawn Minto
 */
public class MylarJavaElementDescriptor extends CompositeImageDescriptor {

    private Image baseImage;

    private ImageDescriptor overlay;

    private Point fSize;

    public MylarJavaElementDescriptor(Image baseImage, ImageDescriptor overlay, Point size) {
        this.baseImage = baseImage;
        this.overlay = overlay;
        setImageSize(size);
    }

    @Override
    protected void drawCompositeImage(int width, int height) {
        if (baseImage == null)
            return;
        ImageData bg = baseImage.getImageData();

        drawImage(bg, 0, 0);

        // Point size= getSize();
        ImageData data = getImageData(overlay);
        drawImage(data, data.width, bg.height - data.height);
    }

    private ImageData getImageData(ImageDescriptor descriptor) {
        ImageData data = descriptor.getImageData(); // see bug 51965:
        // getImageData can return
        // null
        if (data == null) {
            data = DEFAULT_IMAGE_DATA;
            JavaPlugin.logErrorMessage("Image data not available: " + descriptor.toString()); //$NON-NLS-1$
        }
        return data;
    }

    /**
     * Sets the size of the image created by calling <code>createImage()</code>.
     * 
     * @param size
     *            the size of the image returned from calling
     *            <code>createImage()</code>
     * @see ImageDescriptor#createImage()
     */
    public void setImageSize(Point size) {
        Assert.isNotNull(size);
        Assert.isTrue(size.x >= 0 && size.y >= 0);
        fSize = size;
    }

    @Override
    protected Point getSize() {
        return new Point(fSize.x, fSize.y);
    }

}