| /******************************************************************************* |
| * Copyright (c) 2002 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v0.5 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v05.html |
| * |
| * Contributors: |
| * IBM - Initial API and implementation |
| ******************************************************************************/ |
| package org.eclipse.ui.internal.decorators; |
| |
| import java.util.Arrays; |
| |
| import org.eclipse.jface.resource.CompositeImageDescriptor; |
| import org.eclipse.jface.resource.ImageDescriptor; |
| import org.eclipse.swt.graphics.*; |
| |
| /** |
| * An DecoratorOverlayIcon consists of a main icon and several adornments. |
| */ |
| class DecoratorOverlayIcon extends CompositeImageDescriptor { |
| // the base image |
| private Image base; |
| // the overlay images |
| private ImageDescriptor[] overlays; |
| // the size |
| private Point size; |
| |
| 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; |
| |
| /** |
| * OverlayIcon constructor. |
| * |
| * @param base the base image |
| * @param overlays the overlay images |
| * @param locations the location of each image |
| * @param size the size |
| */ |
| public DecoratorOverlayIcon( |
| Image base, |
| ImageDescriptor[] overlays, |
| Point size) { |
| this.base = base; |
| this.overlays = overlays; |
| this.size = size; |
| } |
| /** |
| * Draw the overlays 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 DecoratorOverlayIcon)) |
| return false; |
| DecoratorOverlayIcon other = (DecoratorOverlayIcon) o; |
| return base.equals(other.base) |
| && Arrays.equals(overlays, other.overlays); |
| } |
| |
| public int hashCode() { |
| int code = base.hashCode(); |
| for (int i = 0; i < overlays.length; i++) { |
| if(overlays[i] != null) |
| code ^= overlays[i].hashCode(); |
| } |
| return code; |
| } |
| |
| protected void drawCompositeImage(int width, int height) { |
| ImageDescriptor underlay = overlays[DecoratorRegistryReader.UNDERLAY]; |
| if(underlay != null) |
| drawImage(underlay.getImageData(),0,0); |
| drawImage(base.getImageData(), 0, 0); |
| drawOverlays(overlays); |
| } |
| |
| protected Point getSize() { |
| return size; |
| } |
| } |