bundles/org.eclipse.ui.workbench/Eclipse UI/org/eclipse/ui/internal/misc/ProgramImageDescriptor.java

package org.eclipse.ui.internal.misc;

/*
 * (c) Copyright IBM Corp. 2000, 2001.
 * All Rights Reserved.
 */
import org.eclipse.ui.internal.WorkbenchImages;
import org.eclipse.ui.ISharedImages;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.*;

/**
 * An image descriptor that loads its data from a program file.
 */
public class ProgramImageDescriptor extends ImageDescriptor {
	private String filename;
	private int offset;
/**
 * Creates a new ImageDescriptor. The image is loaded 
 * from a file with the given name <code>name</code>.
 */
public ProgramImageDescriptor(String fullPath, int offsetInFile) {
	filename = fullPath;
	offset = offsetInFile;
}
/**
 * @see Object#equals
 */
public boolean equals(Object o) {
	if (!(o instanceof ProgramImageDescriptor)) {
		return false;
	}
	ProgramImageDescriptor other = (ProgramImageDescriptor)o;
	return filename.equals(other.filename) && offset == other.offset;
}
/**
 * Returns an SWT Image that is described by the information
 * in this descriptor.  Each call returns a new Image.
 */
public Image getImage() {
	return createImage();
}
/**
 * Returns an SWT Image that is described by the information
 * in this descriptor. 
 */
public ImageData getImageData() {
	/*This is a user defined offset into the file which always
	*returns us the defualt - return the default regardless*/

	return WorkbenchImages
		.getImageDescriptor(ISharedImages.IMG_OBJ_FILE)
		.getImageData();
}
/**
 * @see Object#hashCode
 */
public int hashCode() {
	return filename.hashCode() + offset;
}
}