1 /*

     2 * Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 *

    16 */

    17 package com.nokia.carbide.internal.discovery.ui.editor;

    18 

    19 import org.eclipse.swt.SWT;

    20 import org.eclipse.swt.events.PaintEvent;

    21 import org.eclipse.swt.events.PaintListener;

    22 import org.eclipse.swt.graphics.GC;

    23 import org.eclipse.swt.graphics.Image;

    24 import org.eclipse.swt.graphics.Rectangle;

    25 import org.eclipse.swt.widgets.Canvas;

    26 import org.eclipse.swt.widgets.Composite;

    27 

    28 class SharedBackgroundComposite extends Canvas {

    29 

    30 	private final Composite backgroundParent;

    31 

    32 	public SharedBackgroundComposite(Composite parent, Composite backgroundParent) {

    33 		super(parent, SWT.NO_BACKGROUND);

    34 		this.backgroundParent = backgroundParent;

    35 		addPaintListener(new PaintListener() {

    36 			@Override

    37 			public void paintControl(PaintEvent e) {

    38 				Rectangle b = getBounds();

    39 				drawBackground(e.gc, b.x, b.y, b.width, b.height);

    40 			}

    41 		});

    42 	}

    43 	

    44 	@Override

    45 	public void drawBackground(GC gc, int x, int y, int width, int height) {

    46 		Composite relParent = getParent();

    47 		while (relParent != backgroundParent) {

    48 			Rectangle relB = relParent.getBounds();

    49 			x += relB.x;

    50 			y += relB.y;

    51 			relParent = relParent.getParent();

    52 		}

    53 

    54 		Image image = backgroundParent.getBackgroundImage();

    55 		Rectangle imageBounds = image.getBounds();

    56 		width = Math.min(width, imageBounds.width - x);

    57 		height = Math.min(height, imageBounds.height - y);

    58 		if (width > 0 && height > 0)

    59 			gc.drawImage(image, x, y, width, height, 0, 0, width, height);

    60 //		gc.setForeground(gc.getDevice().getSystemColor(SWT.COLOR_WHITE));

    61 //		gc.drawRectangle(1, 1, width - 2, height - 2);

    62 	}

    63 

    64 }