/*******************************************************************************
* Copyright (c) 2005, 2006 IBM Corporation 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:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.ui.internal.cheatsheets.composite.explorer;
import org.eclipse.jface.resource.*;
import org.eclipse.swt.graphics.*;
/**
* An OverlayIcon consists of a main icon and several adornments.
*/
public abstract class AbstractOverlayIcon extends CompositeImageDescriptor {
static final int DEFAULT_WIDTH = 16;
static final int DEFAULT_HEIGHT = 16;
private Point fSize = null;
private ImageDescriptor fOverlays[][];
public AbstractOverlayIcon(ImageDescriptor[][] overlays) {
this(overlays, null);
}
public AbstractOverlayIcon(ImageDescriptor[][] overlays, Point size) {
fOverlays = overlays;
if (size != null)
fSize = size;
else
fSize = new Point(DEFAULT_WIDTH, DEFAULT_HEIGHT);
}
protected void drawBottomLeft(ImageDescriptor[] overlays) {
if (overlays == null)
return;
int length = overlays.length;
int x = 0;
for (int i = 0; i < 3; i++) {
if (i < length && overlays[i] != null) {
ImageData id = overlays[i].getImageData();
drawImage(id, x, getSize().y - id.height);
x += id.width;
}
}
}
protected void drawBottomRight(ImageDescriptor[] overlays) {
if (overlays == null)
return;
int length = overlays.length;
int x = getSize().x;
for (int i = 2; i >= 0; i--) {
if (i < length && overlays[i] != null) {
ImageData id = overlays[i].getImageData();
x -= id.width;
drawImage(id, x, getSize().y - id.height);
}
}
}
protected abstract ImageData getBaseImageData();
protected void drawCompositeImage(int width, int height) {
ImageData base = getBaseImageData();
drawImage(base, 0, 0);
if (fOverlays != null) {
if (fOverlays.length > 0)
drawTopRight(fOverlays[0]);
if (fOverlays.length > 1)
drawBottomRight(fOverlays[1]);
if (fOverlays.length > 2)
drawBottomLeft(fOverlays[2]);
if (fOverlays.length > 3)
drawTopLeft(fOverlays[3]);
}
}
protected void drawTopLeft(ImageDescriptor[] overlays) {
if (overlays == null)
return;
int length = overlays.length;
int x = 0;
for (int i = 0; i < 3; i++) {
if (i < length && overlays[i] != null) {
ImageData id = overlays[i].getImageData();
drawImage(id, x, 0);
x += id.width;
}
}
}
protected void drawTopRight(ImageDescriptor[] overlays) {
if (overlays == null)
return;
int length = overlays.length;
int x = getSize().x;
for (int i = 2; i >= 0; i--) {
if (i < length && overlays[i] != null) {
ImageData id = overlays[i].getImageData();
x -= id.width;
drawImage(id, x, 0);
}
}
}
protected Point getSize() {
return fSize;
}
}
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