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/*******************************************************************************
* Copyright (c) 2000, 2006 QNX Software Systems 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:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.debug.internal.ui;
import java.util.Arrays;
import org.eclipse.jface.resource.CompositeImageDescriptor;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.graphics.Point;
public class OverlayImageDescriptor extends CompositeImageDescriptor {
static final int DEFAULT_WIDTH = 16;
static final int DEFAULT_HEIGHT = 16;
public static final int TOP_LEFT = 0;
public static final int TOP_RIGHT = 1;
public static final int BOTTOM_LEFT = 2;
public static final int BOTTOM_RIGHT = 3;
// the base image
private Image fBase;
// the overlay images
private ImageDescriptor[] fOverlays;
// the size
private Point fSize;
public OverlayImageDescriptor( Image base, ImageDescriptor[] overlays ) {
this( base, overlays, new Point( DEFAULT_WIDTH, DEFAULT_HEIGHT ) );
}
public OverlayImageDescriptor( Image base, ImageDescriptor[] overlays, Point size ) {
setBase( base );
setOverlays( overlays );
setSize( size );
}
/**
* Draw the fOverlays for the reciever.
*/
protected void drawOverlays(ImageDescriptor[] overlays) {
Point size = getSize();
for ( int i = 0; i < overlays.length; i++ ) {
ImageDescriptor overlay = overlays[i];
if ( overlay == null )
continue;
ImageData overlayData = overlay.getImageData();
//Use the missing descriptor if it is not there.
if ( overlayData == null )
overlayData = ImageDescriptor.getMissingImageDescriptor().getImageData();
switch( i ) {
case TOP_LEFT:
drawImage( overlayData, 0, 0 );
break;
case TOP_RIGHT:
drawImage( overlayData, size.x - overlayData.width, 0 );
break;
case BOTTOM_LEFT:
drawImage( overlayData, 0, size.y - overlayData.height );
break;
case BOTTOM_RIGHT:
drawImage( overlayData, size.x - overlayData.width, size.y - overlayData.height );
break;
}
}
}
public boolean equals( Object o ) {
if ( !(o instanceof OverlayImageDescriptor) )
return false;
OverlayImageDescriptor other = (OverlayImageDescriptor)o;
return getBase().equals( other.getBase() ) && Arrays.equals( getOverlays(), other.getOverlays() );
}
public int hashCode() {
int code = getBase().hashCode();
for (int i = 0; i < getOverlays().length; i++) {
if ( getOverlays()[i] != null )
code ^= getOverlays()[i].hashCode();
}
return code;
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.resource.CompositeImageDescriptor#drawCompositeImage(int,
* int)
*/
protected void drawCompositeImage( int width, int height ) {
drawImage( getBase().getImageData(), 0, 0 );
drawOverlays( getOverlays() );
}
/*
* (non-Javadoc)
*
* @see org.eclipse.jface.resource.CompositeImageDescriptor#getSize()
*/
protected Point getSize() {
return this.fSize;
}
private Image getBase() {
return this.fBase;
}
private void setBase( Image base ) {
this.fBase = base;
}
private ImageDescriptor[] getOverlays() {
return this.fOverlays;
}
private void setOverlays( ImageDescriptor[] overlays ) {
this.fOverlays = overlays;
}
private void setSize( Point size ) {
this.fSize = size;
}
}
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