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/*******************************************************************************
* Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.compare.internal;
import org.eclipse.swt.graphics.*;
import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
/**
* Combines an image with an overlay.
*/
public class DiffImage extends CompositeImageDescriptor {
static final int HEIGHT= 16;
private Image fBaseImage;
private ImageDescriptor fOverlayImage;
private int fWidth;
private boolean fLeft= true;
public DiffImage(Image base, ImageDescriptor overlay, int w) {
fBaseImage= base;
fOverlayImage= overlay;
fWidth= w;
}
public DiffImage(Image base, ImageDescriptor overlay, int w, boolean onLeft) {
fBaseImage= base;
fOverlayImage= overlay;
fWidth= w;
fLeft= onLeft;
}
protected Point getSize() {
return new Point(fWidth, HEIGHT);
}
protected void drawCompositeImage(int width, int height) {
if (fLeft) {
if (fBaseImage != null) {
ImageData base= fBaseImage.getImageData();
if (base == null)
base= DEFAULT_IMAGE_DATA;
drawImage(base, fWidth - base.width, 0);
}
if (fOverlayImage != null) {
ImageData overlay= fOverlayImage.getImageData();
if (overlay == null)
overlay= DEFAULT_IMAGE_DATA;
drawImage(overlay, 0, (HEIGHT - overlay.height) / 2);
}
} else {
if (fBaseImage != null) {
ImageData base= fBaseImage.getImageData();
if (base == null)
base= DEFAULT_IMAGE_DATA;
drawImage(base, 0, 0);
}
if (fOverlayImage != null) {
ImageData overlay= fOverlayImage.getImageData();
if (overlay == null)
overlay= DEFAULT_IMAGE_DATA;
drawImage(overlay, fWidth - overlay.width, (HEIGHT - overlay.height) / 2);
}
}
}
}
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